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Sample records for acute pain models

  1. Acute pain.

    PubMed

    Good, M

    1999-01-01

    The review of acute pain describes the problem of unresolved pain and its effects on the neural, autonomic, and immune systems. Conceptualizations and mechanisms of pain are reviewed as well as theories of pain management. Descriptive studies of patient and nurse factors that inhibit effective pain management are discussed, followed by studies of pharmacological and nonpharmacological interventions. Critical analysis reveals that most studies were atheoretical, and therefore, this proliferation of information lacked conceptual coherence and organization. Furthermore, the nature and extent of barriers to pain management were described, but few intervention studies have been devised, as yet, to modify the knowledge, beliefs, and attitudes of nurses and patients that are barriers to pain management. Although some of the complementary therapies have sufficient research support to be used in clinical pain management, the physiological mechanisms and outcomes need to be studied. It is critical at this time to design studies of interventions to improve assessment, decision making, attentive care, and patient teaching. PMID:10418655

  2. Efficacy of disintegrating aspirin in two different models for acute mild-to-moderate pain: sore throat pain and dental pain.

    PubMed

    Voelker, M; Schachtel, B P; Cooper, S A; Gatoulis, S C

    2016-02-01

    A recently developed fast-release aspirin tablet formulation has been evaluated in two different pain models. The dental impaction pain model and the sore throat pain model are widely used for assessing analgesia, including acute mild-to-moderate pain. Both studies were double-blind, randomized, parallel group and compared a single dose of 1000 mg aspirin with 1000 mg paracetamol and with placebo and investigated the onset and overall time course of pain relief. Speed of onset was measured by the double-stopwatch method for time to meaningful pain relief and time to first perceptible pain relief. Pain intensity and pain relief were rated subjectively over a 6-h (dental pain) and 2-h (sore throat pain) time period. In both models fast-release aspirin and commercial paracetamol were statistically significantly different from placebo for onset of action, summed pain intensity differences and total pain relief. Meaningful pain relief was achieved within a median of 42.3 and 42.9 min for aspirin and paracetamol, respectively, in the dental pain model. The corresponding numbers in sore throat pain were 48.0 and 40.4 min. All treatments in both studies were safe and well tolerated. No serious adverse events were reported and no subject was discontinued due to an adverse event. Overall the two studies clearly demonstrated efficacy over placebo in the two pain models and a comparable efficacy and safety profile between aspirin and an equivalent dose of paracetamol under the conditions of acute dental pain and acute sore throat pain. Trial registration These trials were registered with ClinicalTrials.gov, registration number: NCT01420094, registration date: July 27, 2011 and registration number: NCT01453400, registration date: October 13, 2011. PMID:26603742

  3. Mouse models of acute, chemical itch and pain in humans

    PubMed Central

    LaMotte, Robert H.; Shimada, Steven G.; Sikand, Parul

    2011-01-01

    In psychophysical experiments, humans use different verbal responses to pruritic and algesic chemical stimuli to indicate the different qualities of sensation they feel. A major challenge for behavioral models in the mouse of chemical itch and pain in humans is to devise experimental protocols that provide the opportunity for the animal to exhibit a multiplicity of responses as well. One basic criterion is that chemicals that evoke primarily itch or pain in humans should elicit different types of responses when applied in the same way to the mouse. Meeting this criterion is complicated by the fact that the type of behavioral responses exhibited by the mouse depends in part on the site of chemical application such as the nape of the neck which evokes only scratching with the hind paw vs. the hind limb which elicits licking and biting. Here, we review to what extent mice behaviorally differentiate chemicals that elicit itch vs. pain in humans. PMID:21929688

  4. Frutalin reduces acute and neuropathic nociceptive behaviours in rodent models of orofacial pain.

    PubMed

    Damasceno, Marina B M V; de Melo Júnior, José de Maria A; Santos, Sacha Aubrey A R; Melo, Luana T M; Leite, Laura Hévila I; Vieira-Neto, Antonio E; Moreira, Renato de A; Monteiro-Moreira, Ana Cristina de O; Campos, Adriana R

    2016-08-25

    Orofacial pain is a highly prevalent clinical condition, yet difficult to control effectively with available drugs. Much attention is currently focused on the anti-inflammatory and antinociceptive properties of lectins. The purpose of this study was to evaluate the antinociceptive effect of frutalin (FTL) using rodent models of inflammatory and neuropathic orofacial pain. Acute pain was induced by formalin, glutamate or capsaicin (orofacial model) and hypertonic saline (corneal model). In one experiment, animals were pretreated with l-NAME and naloxone to investigate the mechanism of antinociception. The involvement of the lectin domain in the antinociceptive effect of FTL was verified by allowing the lectin to bind to its specific ligand. In another experiment, animals pretreated with FTL or saline were submitted to the temporomandibular joint formalin test. In yet another, animals were submitted to infraorbital nerve transection to induce chronic pain, followed by induction of thermal hypersensitivity using acetone. Motor activity was evaluated with the rotarod test. A molecular docking was performed using the TRPV1 channel. Pretreatment with FTL significantly reduced nociceptive behaviour associated with acute and neuropathic pain, especially at 0.5 mg/kg. Antinociception was effectively inhibited by l-NAME and d-galactose. In line with in vivo experiments, docking studies indicated that FTL may interact with TRPV1. Our results confirm the potential pharmacological relevance of FTL as an inhibitor of orofacial nociception in acute and chronic pain mediated by TRPA1, TRPV1 and TRPM8 receptor. PMID:27302204

  5. Distinct gender-related sleep pattern in an acute model of TMJ pain.

    PubMed

    Schütz, T C B; Andersen, M L; Silva, A; Tufik, S

    2009-05-01

    Since it is recognized that acute inflammation of the temporomandibular joint results in sleep disturbances in male rats, and that the orofacial region may display a site-specific effect of ovarian hormones on nociception, we hypothesized that distinct genders would respond differently when subjected to this inflammatory acute orofacial pain. Sleep was monitored after injection of saline/Freund's adjuvant into the temporomandibular joint in male and female (proestrus and diestrus phases) rats. Progesterone and stress-related hormones were also assessed. In males, Freund's adjuvant induced a significant nociceptive response and sleep disturbances. Behavior and sleep architecture in the females remained unaffected. Our results suggest that females and males present distinct responses to an acute model of orofacial pain. PMID:19493893

  6. An approach to model Right Iliac Fossa pain using pain-only-parameters for screening acute appendicitis.

    PubMed

    Chattopadhyay, Subhagata; Rabhi, Fethi; Acharya, U Rajendra; Joshi, Rohan; Gajendran, Rudhram

    2012-06-01

    Acute appendicitis (AA) is one of the commonest of multiple possible pathologies at the backdrop of Right Iliac Fossa (RIF) pain. RIF is the most common acute surgical condition of the abdomen. Even though AA is a recognized disease entity since decades, its diagnosis still lacks clinical confidence and mandates laboratory tests. Given the issue, this paper proposes a mathematical model using Pain-Only-Parameters (POP) obtained from available literature to screen AA. Weights have been assigned for each POP to create a training data matrix (N = 51) and used to calculate the cumulative effect or weighted sum, which is termed as the Pain Confidence Score (PCS). Based on PCS, a group of real-world patients (N = 40; AA and NA = 20 each) are classified as cases of AA or non-appendicitis (NA) with satisfactory results (sensitivity 85%, specificity 75%, precision 77%, and accuracy 80%). Most rural health centers (RHC) in developing nations lack specialist services and related infrastructure. Hence, such a tool could be useful in RHC to assist general physicians in screening AA and their timely referral to higher centers. PMID:20949312

  7. [Acute Chest Pain].

    PubMed

    Gmür, Christian

    2016-02-17

    Acute chest pain is a frequent consultation reason in general practice as well as in emergency departments. With the help of history, physical examination, ECG, laboratory and newly developed risk scores, potentially life-threatening diseases and high-risk patients may be detected and treated early, quickly and cost-effectively. New biomarkers and their combination with risk scores can increase the negative predictive value to exclude certain diseases. PMID:26886697

  8. Lamotrigine for acute and chronic pain

    PubMed Central

    Wiffen, Philip J; Derry, Sheena; Moore, R Andrew

    2014-01-01

    Background This is an update of the original Cochrane review published in Issue 2, 2007. Some antiepileptic medicines have a place in the treatment of neuropathic pain (pain due to nerve damage). This updated review adds five new additional studies looking at evidence for Lamotrigine as an effective treatment for acute and chronic pain. Objectives To assess analgesic efficacy and adverse effects of the antiepileptic drug lamotrigine in acute and chronic pain. Search methods Randomised controlled trials (RCTs) of lamotrigine in acute, and chronic pain (including cancer pain) were identified from MEDLINE, EMBASE and CENTRAL up to January 2011. Additional studies were sought from the reference list of the retrieved papers. Selection criteria RCTs investigating the use of lamotrigine (any dose, by any route, and for any study duration) for the treatment of acute or chronic pain. Assessment of pain intensity or pain relief, or both, using validated scales. Participants were adults aged 18 and over. Only full journal publication articles were included. Data collection and analysis Dichotomous data (ideally for the outcome of at least 50% pain relief) were used to calculate relative risk with 95% confidence intervals. Meta-analysis was undertaken using a fixed-effect model. Numbers needed to treat to benefit (NNTs) were calculated as the reciprocal of the absolute risk reduction. For unwanted effects, the NNT becomes the number needed to harm (NNH) and was calculated. Main results Twelve included studies in 11 publications (1511 participants), all with chronic neuropathic pain: central post stroke pain (1), chemotherapy induced neuropathic pain (1), diabetic neuropathy (4), HIV related neuropathy (2), mixed neuropathic pain (2), spinal cord injury related pain (1), and trigeminal neuralgia (1); none investigated lamotrigine in acute pain. The update had five additional studies (1111 additional participants). Participants were aged between 26 and 77 years. Study duration

  9. Low back pain - acute

    MedlinePlus

    ... as ice, mild painkillers, physical therapy, and proper exercises. Most of the time, back pain will get ... prevent getting back pain again. Stretching and strengthening exercises are important. But, starting these exercises too soon ...

  10. Rofecoxib modulates multiple gene expression pathways in a clinical model of acute inflammatory pain

    PubMed Central

    Wang, Xiao-Min; Wu, Tian-Xia; Hamza, May; Ramsay, Edward S.; Wahl, Sharon M.; Dionne, Raymond A.

    2007-01-01

    New insights into the biological properties of cyclooxygenase-2 (COX-2) and its response pathway challenge the hypothesis that COX-2 is simply pro-inflammatory and inhibition of COX-2 solely prevents the development of inflammation and ameliorates inflammatory pain. The present study performed a comprehensive analysis of gene/protein expression induced by a selective inhibitor of COX-2, rofecoxib, compared with a non-selective COX inhibitor, ibuprofen, and placebo in a clinical model of acute inflammatory pain (the surgical extraction of impacted third molars) using microarray analysis followed by quantitative RT-PCR verification and Western blotting. Inhibition of COX-2 modulated gene expression related to inflammation and pain, the arachidonic acid pathway, apoptosis/angiogenesis, cell adhesion and signal transduction. Compared to placebo, rofecoxib treatment increased the gene expression of ANXA3 (annexin 3), SOD2 (superoxide dismutase 2), SOCS3 (suppressor of cytokine signaling 3) and IL1RN (IL1 receptor antagonist) which are associated with inhibition of phospholipase A2 and suppression of cytokine signaling cascades, respectively. Both rofecoxib and ibuprofen treatment increased the gene expression of the pro-inflammatory mediators, IL6 and CCL2 (chemokine C-C motif ligand 2), following tissue injury compared to the placebo treatment. These results indicate a complex role for COX-2 in the inflammatory cascade in addition to the well-characterized COX-dependent pathway, as multiple pathways are also involved in rofecoxib-induced anti-inflammatory and analgesic effects at the gene expression level. These findings may also suggest an alternative hypothesis for the adverse effects attributed to selective inhibition of COX-2. PMID:17070997

  11. Acute pain management in children

    PubMed Central

    Verghese, Susan T; Hannallah, Raafat S

    2010-01-01

    The greatest advance in pediatric pain medicine is the recognition that untreated pain is a significant cause of morbidity and even mortality after surgical trauma. Accurate assessment of pain in different age groups and the effective treatment of postoperative pain is constantly being refined; with newer drugs being used alone or in combination with other drugs continues to be explored. Several advances in developmental neurobiology and pharmacology, knowledge of new analgesics and newer applications of old analgesics in the last two decades have helped the pediatric anesthesiologist in managing pain in children more efficiently. The latter include administering opioids via the skin and nasal mucosa and their addition into the neuraxial local anesthetics. Systemic opioids, nonsteroidal anti-inflammatory agents and regional analgesics alone or combined with additives are currently used to provide effective postoperative analgesia. These modalities are best utilized when combined as a multimodal approach to treat acute pain in the perioperative setting. The development of receptor specific drugs that can produce pain relief without the untoward side effects of respiratory depression will hasten the recovery and discharge of children after surgery. This review focuses on the overview of acute pain management in children, with an emphasis on pharmacological and regional anesthesia in achieving this goal. PMID:21197314

  12. Acute pain transfusion reaction.

    PubMed

    Hardwick, Jody; Osswald, Michael; Walker, Daniel

    2013-11-01

    A 34-year-old woman with a diagnosis of hemophagocytic lymphohistocytosis (HLH) received a double umbilical cord blood transplantation following a myeloablative chemotherapy preparative regimen with busulfan and cyclophosphamide. HLH is a rare, potentially fatal hematologic disorder characterized by the overactivation of histocytes and T lymphocytes, leading to organ infiltration and acute illness. On day 25 post-transplantation, the patient required a platelet transfusion for a platelet count of 6,000 per ml (normal range = 150,000-450,000 per ml). The patient's blood type prior to the cord blood transplantation was B positive and, although both umbilical cord blood donors were O positive, the patient was still B positive per blood bank testing on that day. Although the recipient of an allogenic stem cell transplantation will eventually become the blood type of the donor, the time for this process to occur varies for each person. That process must be monitored by the blood bank for the purpose of cross-matching blood products to decrease hemolysis as much as possible. The patient was premedicated with the facility's standard for platelet transfusions: acetaminophen 650 mg and diphenhydramine 25 mg about 30 minutes prior to the platelet transfusion. PMID:24161631

  13. Acute Abdominal Pain in Children.

    PubMed

    Reust, Carin E; Williams, Amy

    2016-05-15

    Acute abdominal pain accounts for approximately 9% of childhood primary care office visits. Symptoms and signs that increase the likelihood of a surgical cause for pain include fever, bilious vomiting, bloody diarrhea, absent bowel sounds, voluntary guarding, rigidity, and rebound tenderness. The age of the child can help focus the differential diagnosis. In infants and toddlers, clinicians should consider congenital anomalies and other causes, including malrotation, hernias, Meckel diverticulum, or intussusception. In school-aged children, constipation and infectious causes of pain, such as gastroenteritis, colitis, respiratory infections, and urinary tract infections, are more common. In female adolescents, clinicians should consider pelvic inflammatory disease, pregnancy, ruptured ovarian cysts, or ovarian torsion. Initial laboratory tests include complete blood count, erythrocyte sedimentation rate or C-reactive protein, urinalysis, and a pregnancy test. Abdominal radiography can be used to diagnose constipation or obstruction. Ultrasonography is the initial choice in children for the diagnosis of cholecystitis, pancreatitis, ovarian cyst, ovarian or testicular torsion, pelvic inflammatory disease, pregnancy-related pathology, and appendicitis. Appendicitis is the most common cause of acute abdominal pain requiring surgery, with a peak incidence during adolescence. When the appendix is not clearly visible on ultrasonography, computed tomography or magnetic resonance imaging can be used to confirm the diagnosis. PMID:27175718

  14. A Clinical Experimental Model to Evaluate Analgesic Effect of Remote Ischemic Preconditioning in Acute Postoperative Pain

    PubMed Central

    Pereira, Francisco Elano Carvalho; Mello, Irene Lopes; Pimenta, Fernando Heladio de Oliveira Medeiros; Costa, Debora Maia; Wong, Deysi Viviana Tenazoa; Fernandes, Claudia Regina; Lima Junior, Roberto César; Gomes, Josenília M. Alves

    2016-01-01

    This study aims to evaluate the viability of a clinical model of remote ischemic preconditioning (RIPC) and its analgesic effects. It is a prospective study with twenty (20) patients randomly divided into two groups: control group and RIPC group. The opioid analgesics consumption in the postoperative period, the presence of secondary mechanical hyperalgesia, the scores of postoperative pain by visual analog scale, and the plasma levels interleukins (IL-6) were evaluated. The tourniquet applying after spinal anesthetic block was safe, producing no pain for all patients in the tourniquet group. The total dose of morphine consumption in 24 hours was significantly lower in RIPC group than in the control group (p = 0.0156). The intensity analysis of rest pain, pain during coughing and pain in deep breathing, showed that visual analogue scale (VAS) scores were significantly lower in RIPC group compared to the control group: p = 0.0087, 0.0119, and 0.0015, respectively. There were no differences between groups in the analysis of presence or absence of mechanical hyperalgesia (p = 0.0704) and in the serum levels of IL-6 dosage over time (p < 0.0001). This clinical model of remote ischemic preconditioning promoted satisfactory analgesia in patients undergoing conventional cholecystectomy, without changing serum levels of IL-6. PMID:27446611

  15. A Clinical Experimental Model to Evaluate Analgesic Effect of Remote Ischemic Preconditioning in Acute Postoperative Pain.

    PubMed

    Pereira, Francisco Elano Carvalho; Mello, Irene Lopes; Pimenta, Fernando Heladio de Oliveira Medeiros; Costa, Debora Maia; Wong, Deysi Viviana Tenazoa; Fernandes, Claudia Regina; Lima Junior, Roberto César; Gomes, Josenília M Alves

    2016-01-01

    This study aims to evaluate the viability of a clinical model of remote ischemic preconditioning (RIPC) and its analgesic effects. It is a prospective study with twenty (20) patients randomly divided into two groups: control group and RIPC group. The opioid analgesics consumption in the postoperative period, the presence of secondary mechanical hyperalgesia, the scores of postoperative pain by visual analog scale, and the plasma levels interleukins (IL-6) were evaluated. The tourniquet applying after spinal anesthetic block was safe, producing no pain for all patients in the tourniquet group. The total dose of morphine consumption in 24 hours was significantly lower in RIPC group than in the control group (p = 0.0156). The intensity analysis of rest pain, pain during coughing and pain in deep breathing, showed that visual analogue scale (VAS) scores were significantly lower in RIPC group compared to the control group: p = 0.0087, 0.0119, and 0.0015, respectively. There were no differences between groups in the analysis of presence or absence of mechanical hyperalgesia (p = 0.0704) and in the serum levels of IL-6 dosage over time (p < 0.0001). This clinical model of remote ischemic preconditioning promoted satisfactory analgesia in patients undergoing conventional cholecystectomy, without changing serum levels of IL-6. PMID:27446611

  16. Aldehyde dehydrogenase-2 regulates nociception in rodent models of acute inflammatory pain

    PubMed Central

    Zambelli, Vanessa O.; Gross, Eric R.; Chen, Che-Hong; Gutierrez, Vanessa P.; Cury, Yara; Mochly-Rosen, Daria

    2014-01-01

    Exogenous aldehydes can cause pain in animal models, suggesting that aldehyde dehydrogenase 2 (ALDH2), which metabolizes many aldehydes, may regulate nociception. To test this hypothesis, we generated a knock-in mouse with an inactivating point mutation in ALDH2 (ALDH2*2), which is also present in human ALDH2 of ~540 million East Asians. The ALDH2*1/*2 heterozygotic mice exhibited a larger response to painful stimuli than their wild-type littermates, and this heightened nociception was inhibited by an ALDH2-selective activator (Alda-1). No effect on inflammation per se was observed. Using a rat model, we then showed that nociception tightly correlated with ALDH activity (R2=0.90) and that reduced nociception was associated with less early growth response protein 1 (EGR1) in the spinal cord and less reactive aldehyde accumulation at the insult site (including acetaldehyde and 4-hydroxynonenal). Further, acetaldehyde and formalin-induced nociceptive behavior was greater in the ALDH2*1/*2 mice than wild-type mice. Finally, Alda-1 treatment was also beneficial when given even after the inflammatory agent was administered. Our data in rodent models suggest that the mitochondrial enzyme ALDH2 regulates nociception and could serve as a molecular target for pain control, with ALDH2 activators, such as Alda-1, as potential non-narcotic cardiac-safe analgesics. Furthermore, our results suggest a possible genetic basis for East Asians’ apparent lower pain tolerance. PMID:25163478

  17. [Ultrasonography in acute pelvic pain].

    PubMed

    Kupesić, Sanja; Aksamija, Alenka; Vucić, Niksa; Tripalo, Ana; Kurjak, Asim

    2002-01-01

    Acute pelvic pain may be the manifestation of various gynecologic and non-gynecologic disorders from less alarming rupture of the follicular cyst to life threatening conditions such as rupture of ectopic pregnancy or perforation of inflamed appendix. In order to construct an algorithm for differential diagnosis we divide acute pelvic pain into gynecologic and non-gynecologic etiology, which is than subdivided into gastrointestinal and urinary causes. Appendicitis is the most common surgical emergency and should always be considered in differential diagnosis if appendix has not been removed. Apart of clinical examination and laboratory tests, an ultrasound examination is sensitive up to 90% and specific up to 95% if graded compression technique is used. Still it is user-depended and requires considerable experience in order to perform it reliably. Meckel's diverticulitis, acute terminal ileitis, mesenteric lymphadenitis and functional bowel disease are conditions that should be differentiated from other causes of low abdominal pain by clinical presentation, laboratory and imaging tests. Dilatation of renal pelvis and ureter are typical signs of obstructive uropathy and may be efficiently detected by ultrasound. Additional thinning of renal parenchyma suggests long-term obstructive uropathy. Ruptured ectopic pregnancy, salpingitis and hemorrhagic ovarian cysts are three most commonly diagnosed gynecologic conditions presenting as an acute abdomen. Degenerating leiomyomas and adnexal torsion occur less frequently. For better systematization, gynecologic causes of acute pelvic pain could be divided into conditions with negative pregnancy test and conditions with positive pregnancy test. Pelvic inflammatory disease may be ultrasonically presented with numerous signs such as thickening of the tubal wall, incomplete septa within the dilated tube, demonstration of hyperechoic mural nodules, free fluid in the "cul-de-sac" etc. Color Doppler ultrasound contributes to more

  18. Neuroligin 2 regulates spinal GABAergic plasticity in hyperalgesic priming, a model of the transition from acute to chronic pain.

    PubMed

    Kim, Ji-Young V; Megat, Salim; Moy, Jamie K; Asiedu, Marina N; Mejia, Galo L; Vagner, Josef; Price, Theodore J

    2016-06-01

    Plasticity in inhibitory receptors, neurotransmission, and networks is an important mechanism for nociceptive signal amplification in the spinal dorsal horn. We studied potential changes in GABAergic pharmacology and its underlying mechanisms in hyperalgesic priming, a model of the transition from acute to chronic pain. We find that while GABAA agonists and positive allosteric modulators reduce mechanical hypersensitivity to an acute insult, they fail to do so during the maintenance phase of hyperalgesic priming. In contrast, GABAA antagonism promotes antinociception and a reduction in facial grimacing after the transition to a chronic pain state. During the maintenance phase of hyperalgesic priming, we observed increased neuroligin (nlgn) 2 expression in the spinal dorsal horn. This protein increase was associated with an increase in nlgn2A splice variant mRNA, which promotes inhibitory synaptogenesis. Disruption of nlgn2 function with the peptide inhibitor, neurolide 2, produced mechanical hypersensitivity in naive mice but reversed hyperalgesic priming in mice previously exposed to brain-derived neurotrophic factor. Neurolide 2 treatment also reverses the change in polarity in GABAergic pharmacology observed in the maintenance of hyperalgesic priming. We propose that increased nlgn2 expression is associated with hyperalgesic priming where it promotes dysregulation of inhibitory networks. Our observations reveal new mechanisms involved in the spinal maintenance of a pain plasticity and further suggest that disinhibitory mechanisms are central features of neuroplasticity in the spinal dorsal horn. PMID:26859820

  19. Estimating the Risk of Chronic Pain: Development and Validation of a Prognostic Model (PICKUP) for Patients with Acute Low Back Pain

    PubMed Central

    Traeger, Adrian C.; Henschke, Nicholas; Hübscher, Markus; Williams, Christopher M.; Kamper, Steven J.; Maher, Christopher G.; Moseley, G. Lorimer; McAuley, James H.

    2016-01-01

    Background Low back pain (LBP) is a major health problem. Globally it is responsible for the most years lived with disability. The most problematic type of LBP is chronic LBP (pain lasting longer than 3 mo); it has a poor prognosis and is costly, and interventions are only moderately effective. Targeting interventions according to risk profile is a promising approach to prevent the onset of chronic LBP. Developing accurate prognostic models is the first step. No validated prognostic models are available to accurately predict the onset of chronic LBP. The primary aim of this study was to develop and validate a prognostic model to estimate the risk of chronic LBP. Methods and Findings We used the PROGRESS framework to specify a priori methods, which we published in a study protocol. Data from 2,758 patients with acute LBP attending primary care in Australia between 5 November 2003 and 15 July 2005 (development sample, n = 1,230) and between 10 November 2009 and 5 February 2013 (external validation sample, n = 1,528) were used to develop and externally validate the model. The primary outcome was chronic LBP (ongoing pain at 3 mo). In all, 30% of the development sample and 19% of the external validation sample developed chronic LBP. In the external validation sample, the primary model (PICKUP) discriminated between those who did and did not develop chronic LBP with acceptable performance (area under the receiver operating characteristic curve 0.66 [95% CI 0.63 to 0.69]). Although model calibration was also acceptable in the external validation sample (intercept = −0.55, slope = 0.89), some miscalibration was observed for high-risk groups. The decision curve analysis estimated that, if decisions to recommend further intervention were based on risk scores, screening could lead to a net reduction of 40 unnecessary interventions for every 100 patients presenting to primary care compared to a “treat all” approach. Limitations of the method include the model being

  20. Pain Management: Part 1: Managing Acute and Postoperative Dental Pain

    PubMed Central

    Becker, Daniel E.

    2010-01-01

    Abstract Safe and effective management of acute dental pain can be accomplished with nonopioid and opioid analgesics. To formulate regimens properly, it is essential to appreciate basic pharmacological principles and appropriate dosage strategies for each of the available analgesic classes. This article will review the basic pharmacology of analgesic drug classes, including their relative efficacy for dental pain, and will suggest appropriate regimens based on pain intensity. Management of chronic pain will be addressed in the second part of this series. PMID:20553137

  1. Does acute intraoral pain alter cutaneous sensibility?

    PubMed Central

    Hansson, P; Ekblom, A; Lindblom, U; Marchettini, P

    1988-01-01

    Cutaneous sensibility was tested in eight patients suffering from acute postoperative intraoral pain. Tactile-, cold-, warm-, and heat-pain thresholds as well as reaction time to cold pulses were unaffected by the presence of pain. However, reaction time to warm pulses was increased in the painful area on the day of pain compared to a non-painful state. The findings are discussed in relation to (1) functional convergence of different sensory fibres on central neurons (2) the phenomenon of diffuse noxious inhibitory controls and (3) secondary hyperalgesia. The observed effect of clinical pain on the warm pathway could be explained as an intrasegmental noxious inhibitory effect. PMID:3216205

  2. Pyruvate dehydrogenase kinase 2 and 4 gene deficiency attenuates nociceptive behaviors in a mouse model of acute inflammatory pain.

    PubMed

    Jha, Mithilesh Kumar; Rahman, Md Habibur; Park, Dong Ho; Kook, Hyun; Lee, In-Kyu; Lee, Won-Ha; Suk, Kyoungho

    2016-09-01

    Pyruvate dehydrogenase (PDH) kinases (PDKs) 1-4, expressed in peripheral and central tissues, regulate the activity of the PDH complex (PDC). The PDC is an important mitochondrial gatekeeping enzyme that controls cellular metabolism. The role of PDKs in diverse neurological disorders, including neurometabolic aberrations and neurodegeneration, has been described. Implications for a role of PDKs in inflammation and neurometabolic coupling led us to investigate the effect of genetic ablation of PDK2/4 on nociception in a mouse model of acute inflammatory pain. Deficiency in Pdk2 and/or Pdk4 in mice led to attenuation of formalin-induced nociceptive behaviors (flinching, licking, biting, or lifting of the injected paw). Likewise, the pharmacological inhibition of PDKs substantially diminished the nociceptive responses in the second phase of the formalin test. Furthermore, formalin-provoked paw edema formation and mechanical and thermal hypersensitivities were significantly reduced in Pdk2/4-deficient mice. Formalin-driven neutrophil recruitment at the site of inflammation, spinal glial activation, and neuronal sensitization were substantially lessened in the second or late phase of the formalin test in Pdk2/4-deficient animals. Overall, our results suggest that PDK2/4 can be a potential target for the development of pharmacotherapy for the treatment of acute inflammatory pain. © 2016 Wiley Periodicals, Inc. PMID:26931482

  3. [Intranasal opioids for acute pain].

    PubMed

    Añez Simón, C; Rull Bartomeu, M; Rodríguez Pérez, A; Fuentes Baena, A

    2006-12-01

    Intranasal drug administration is an easy, well-tolerated, noninvasive transmucosal route that avoids first-pass metabolism in the liver. The nasal mucosa provides an extensive, highly vascularized surface of pseudostratified ciliated epithelium. It secretes mucus that is subjected to mucociliary movement that can affect the time of contact between the drug and the surface. Absorption is influenced by anatomical and physiological factors as well as by properties of the drug and the delivery system. We review the literature on intranasal administration of fentanyl, meperidine, diamorphine, and butorphanol to treat acute pain. The adverse systemic effects are similar to those described for intravenous administration, the most common being drowsiness, nausea, and vomiting. Local effects reported are a burning sensation with meperidine and a bad taste. PMID:17302079

  4. Analgesic activity of Ugni molinae (murtilla) in mice models of acute pain.

    PubMed

    Delporte, C; Backhouse, N; Inostroza, V; Aguirre, M C; Peredo, N; Silva, X; Negrete, R; Miranda, H F

    2007-05-30

    Leaf extracts of Ugni molinae Turcz. (Myrtaceae) are used in Chilean folk medicine as analgesic and anti-inflammatory. The antinociceptive effect of dichloromethane (DCM), ethyl acetate (EA) and methanol (ME) leaf extracts was assessed by intraperitoneal, oral and topical administration in writhing, tail flick, and tail formalin tests in mice. The extracts showed a dose-dependent antinociceptive activity in all the assays under different administration routes. The ED(50) values for the different tests for the DCM, EA, ME extract and reference drug (ibuprofen) were as follows. Writhing test in acetic acid (i.p. administration): 0.21, 0.37, 1.37 and 0.85mg/kg, respectively; tail flick test (oral administration): 199, 189, 120 and 45.9mg/kg. The EC(50) values for tail flick test were (topical administration): 2.0, 0.35, 1.4 and 8.2% (w/v), respectively; and the topical analgesic effects were (formalin assay) 75.5, 77.5, 31.6 and 76.5%, respectively. Ugni molinae extracts produce antinociception in chemical and thermal pain models through a mechanism partially linked to either lipooxygenase and/or cyclooxygenase via the arachidonic acid cascade and/or opioid receptors. Flavonoid glycosides and triterpenoids have been isolated from the plant and can be associated with the observed effect. Our results corroborate the analgesic effects of Ugni molinae, and justify its traditional use for treating pain. PMID:17403589

  5. Anger regulation style, anger arousal and acute pain sensitivity: evidence for an endogenous opioid “triggering” model

    PubMed Central

    Burns, John W.; Bruehl, Stephen; Chont, Melissa

    2014-01-01

    Findings suggest that greater tendency to express anger is associated with greater sensitivity to acute pain via endogenous opioid system dysfunction, but past studies have not addressed the role of anger arousal. We used a 2 × 2 factorial design with Drug Condition (placebo or opioid blockade with naltrexone) crossed with Task Order (anger-induction/pain-induction or pain-induction/anger-induction), and with continuous Anger-out Subscale scores. Drug × Task Order × Anger-out Subscale interactions were tested for pain intensity during a 4-min ischemic pain task performed by 146 healthy people. A significant Drug × Task Order × Anger-out Subscale interaction was dissected to reveal different patterns of pain intensity changes during the pain task for high anger-out participants who underwent pain-induction prior to anger-induction compared to those high in anger-out in the opposite order. Namely, when angered prior to pain, high anger-out participants appeared to exhibit low pain intensity under placebo that was not shown by high anger-out participants who received naltrexone. Results hint that people with a pronounced tendency to express anger may suffer from inadequate opioid function under simple pain-induction, but may experience analgesic benefit to some extent from the opioid triggering properties of strong anger arousal. PMID:23624641

  6. Acute and Chronic Low Back Pain.

    PubMed

    Patrick, Nathan; Emanski, Eric; Knaub, Mark A

    2016-01-01

    Low back pain is an extremely common presenting complaint that occurs in upward of 80% of persons. Treatment of an acute episode of back pain includes relative rest, activity modification, nonsteroidal anti-inflammatories, and physical therapy. Patient education is also imperative, as these patients are at risk for further future episodes of back pain. Chronic back pain (>6 months' duration) develops in a small percentage of patients. Clinicians' ability to diagnose the exact pathologic source of these symptoms is severely limited, making a cure unlikely. Treatment of these patients should be supportive, the goal being to improve pain and function. PMID:26614726

  7. The effect of intra-articular vanilloid receptor agonists on pain behavior measures in a murine model of acute monoarthritis

    PubMed Central

    Abdullah, Mishal; Mahowald, Maren L; Frizelle, Sandra P; Dorman, Christopher W; Funkenbusch, Sonia C; Krug, Hollis E

    2016-01-01

    Arthritis is the most common cause of disability in the US, and the primary manifestation of arthritis is joint pain that leads to progressive physical limitation, disability, morbidity, and increased health care utilization. Capsaicin (CAP) is a vanilloid agonist that causes substance P depletion by interacting with vanilloid receptor transient receptor potential V1 on small unmyelinated C fibers. It has been used topically for analgesia in osteoarthritis with variable success. Resiniferatoxin (RTX) is an ultra potent CAP analog. The aim of this study was to measure the analgesic effects of intra-articular (IA) administration of CAP and RTX in experimental acute inflammatory arthritis in mice. Evoked pain score (EPS) and a dynamic weight bearing (DWB) device were used to measure nociceptive behaviors in a murine model of acute inflammatory monoarthritis. A total of 56 C57B16 male mice underwent EPS and DWB testing – 24 nonarthritic controls and 32 mice with carrageenan-induced arthritis. The effects of pretreatment with 0.1% CAP, 0.0003% RTX, or 0.001% RTX were measured. Nociception was reproducibly demonstrated by increased EPS and reduced DWB measures in the affected limb of arthritic mice. Pretreatment with 0.001% RTX resulted in statistically significant improvement in EPS and DWB measures when compared with those observed in carrageenan-induced arthritis animals. Pretreatment with IA 0.0003% RTX and IA 0.01% CAP resulted in improvement in some but not all of these measures. The remaining 24 mice underwent evaluation following treatment with 0.1% CAP, 0.0003% RTX, or 0.001% RTX, and the results obtained were similar to that of naïve, nonarthritic mice. PMID:27574462

  8. The effect of intra-articular vanilloid receptor agonists on pain behavior measures in a murine model of acute monoarthritis.

    PubMed

    Abdullah, Mishal; Mahowald, Maren L; Frizelle, Sandra P; Dorman, Christopher W; Funkenbusch, Sonia C; Krug, Hollis E

    2016-01-01

    Arthritis is the most common cause of disability in the US, and the primary manifestation of arthritis is joint pain that leads to progressive physical limitation, disability, morbidity, and increased health care utilization. Capsaicin (CAP) is a vanilloid agonist that causes substance P depletion by interacting with vanilloid receptor transient receptor potential V1 on small unmyelinated C fibers. It has been used topically for analgesia in osteoarthritis with variable success. Resiniferatoxin (RTX) is an ultra potent CAP analog. The aim of this study was to measure the analgesic effects of intra-articular (IA) administration of CAP and RTX in experimental acute inflammatory arthritis in mice. Evoked pain score (EPS) and a dynamic weight bearing (DWB) device were used to measure nociceptive behaviors in a murine model of acute inflammatory monoarthritis. A total of 56 C57B16 male mice underwent EPS and DWB testing - 24 nonarthritic controls and 32 mice with carrageenan-induced arthritis. The effects of pretreatment with 0.1% CAP, 0.0003% RTX, or 0.001% RTX were measured. Nociception was reproducibly demonstrated by increased EPS and reduced DWB measures in the affected limb of arthritic mice. Pretreatment with 0.001% RTX resulted in statistically significant improvement in EPS and DWB measures when compared with those observed in carrageenan-induced arthritis animals. Pretreatment with IA 0.0003% RTX and IA 0.01% CAP resulted in improvement in some but not all of these measures. The remaining 24 mice underwent evaluation following treatment with 0.1% CAP, 0.0003% RTX, or 0.001% RTX, and the results obtained were similar to that of naïve, nonarthritic mice. PMID:27574462

  9. Cortical theta is increased while thalamocortical coherence is decreased in rat models of acute and chronic pain.

    PubMed

    Leblanc, Brian W; Lii, Theresa R; Silverman, Andrew E; Alleyne, Robert T; Saab, Carl Y

    2014-04-01

    Thalamocortical oscillations are critical for sensory perception. Although pain is known to disrupt synchrony in thalamocortical oscillations, evidence in the literature is controversial. Thalamocortical coherence has been reported to be increased in patients with neurogenic pain but decreased in a rat model of central pain. Moreover, theta (4 to 8 Hz) oscillations in primary somatosensory (S1) cortex are speculated to predict pain in humans. To date, the link between pain and network oscillations in animal models has been understudied. Thus, we tested the hypothesis that pain disrupts thalamocortical coherence and S1 theta power in two rat models of pain. We recorded electrocorticography (ECoG) waveforms over S1 and local field potentials (LFP) within ventral posterolateral thalamus in freely behaving rats under spontaneous (stimulus-independent) pain conditions. Rats received intradermal capsaicin injection (Cap) in the hindpaw, followed hours later by chronic constriction injury (CCI) of the sciatic nerve lasting several days. Our results show that pain decreases coherence between LFP and ECoG waveforms in the 2- to 30-Hz range, and increases ECoG power in the theta range. These changes are short-lasting after Cap and longer-lasting after CCI. These data might be particularly relevant to preclinical correlates of spontaneous pain-like behavior, with potential implications to clinical biomarkers of ongoing pain. PMID:24457192

  10. Preventing Chronic Pain following Acute Pain: Risk Factors, Preventive Strategies, and their Efficacy

    PubMed Central

    McGreevy, Kai; Bottros, Michael M.; Raja, Srinivasa N.

    2011-01-01

    Chronic pain is the leading cause of disability in the United States. The transition from acute to persistent pain is thought to arise from maladaptive neuroplastic mechanisms involving three intertwined processes, peripheral sensitization, central sensitization, and descending modulation. Strategies aimed at preventing persistent pain may target such processes. Models for studying preventive strategies include persistent post-surgical pain (PPP), persistent post-trauma pain (PTP) and post-herpetic neuralgia (PHN). Such entities allow a more defined acute onset of tissue injury after which study of the long-term effects is more easily examined. In this review, we examine the pathophysiology, epidemiology, risk factors, and treatment strategies for the prevention of chronic pain using these models. Both pharmacological and interventional approaches are described, as well as a discussion of preventive strategies on the horizon. PMID:22102847

  11. Imaging for acute pelvic pain in pregnancy.

    PubMed

    Masselli, Gabriele; Brunelli, Roberto; Monti, Riccardo; Guida, Marianna; Laghi, Francesca; Casciani, Emanuele; Polettini, Elisabetta; Gualdi, Gianfranco

    2014-04-01

    Acute pelvic pain in pregnancy presents diagnostic and therapeutic challenges. Standard imaging techniques need to be adapted to reduce harm to the foetus from X-rays because of their teratogenic and carcinogenic potential. Ultrasound remains the primary imaging investigation of the pregnant abdomen. Magnetic resonance imaging (MRI) has been shown to be useful in the diagnosis of gynaecological and obstetric problems during pregnancy and in the setting of acute abdomen during pregnancy. MRI overcomes some of the limitations of ultrasound, mainly the size of the gravid uterus. MRI poses theoretical risks to the foetus and care must be taken to minimise these with the avoidance of contrast agents. Teaching Points • Ultrasound and MRI are the preferred investigations for acute pelvic pain during pregnancy. • Ultrasound remains the primary imaging investigation because of availability and portability. • MRI helps differentiate causes of acute pelvic pain when ultrasound is inconclusive. PMID:24535757

  12. A Comparison of Spinal Iba1 and GFAP expression in Rodent Models of Acute and Chronic Pain

    PubMed Central

    Romero-Sandoval, Alfonso; Chai, Nu; Nutile-McMenemy, Nancy; DeLeo, Joyce A.

    2008-01-01

    The treatment of acute and chronic pain is still deficient. The modulation of glial cells may provide novel targets to treat pain. We hypothesize that astrocytes and microglia participate in the initiation and maintenance of both, acute surgical and chronic neuropathic pain. Rats underwent paw incision, L5 nerve exposure or L5 nerve transection surgery. Behavioral mechanical allodynia was assessed using von Frey filaments. Immunohistochemistry was performed using anti-ionized calcium binding adaptor protein, Iba-1 (microglia), and anti-Glial Fibrillary Acidic Protein, GFAP (astrocytes) on day 1, 4 and 7 after surgery. Following paw incision and at spinal L5 segment GFAP expression was increased in laminae I-II and Iba1 in deep laminae on day 1, in the entire dorsal horn on day 4 and dissipate on day 7 after paw incision in parallel with the allodynia. L5 nerve transection induced mechanical allodynia from day 1 to 7 which correlated with Iba-1 increases on day 1, 4 (entire dorsal horn) and day 7 after nerve injury (deep laminae of the dorsal horn) at spinal L5 segment. Conversely, GFAP increased at later time points from day 4 (deep laminae) and on day 7 (entire dorsal horn). Our data demonstrates that astrocytes (GFAP expression) play a role in the initiation of acute pain and the maintenance of chronic pain while Iba-1 increases closely correlated with the early phase of neuropathic pain. Iba1 and GFAP increased rostrally, at L3 segment, after paw incision (day 4) and only Iba1 increased following L5 nerve transection (day 7). PMID:18538310

  13. Acute Painful Stress and Inflammatory Mediator Production

    PubMed Central

    Griffis, Charles A.; Breen, Elizabeth Crabb; Compton, Peggy; Goldberg, Alyssa; Witarama, Tuff; Kotlerman, Jenny; Irwin, Michael R.

    2014-01-01

    Pro-inflammatory pathways may be activated under conditions of painful stress, which is hypothesized to worsen the pain experience and place medically-vulnerable populations at risk for increased morbidity. Objectives To evaluate the effects of pain and subjective pain-related stress on pro-inflammatory activity. Methods A total of 19 healthy control subjects underwent a single standard cold-pressor pain test (CPT) and a no-pain control condition. Indicators of pain and stress were measured and related to inflammatory immune responses (CD811a, IL-1RA, and IL-6) immediately following the painful stimulus, and compared to responses under non-pain conditions. Heart rate and mean arterial pressure were measured as indicators of sympathetic stimulation. Results CPT was clearly painful and generated an activation of the sympathetic nervous system. CD811a increased in both conditions, but with no statistically significant greater increase following CPT (p < .06). IL-1RA demonstrated a non-statistically significant increase following CPT (p < .07). The change in IL-6 following CPT differed significantly from the response seen in the control condition (p < .02). Conclusions These findings suggest that CP acute pain may affect proinflammatory pathways, possibly through mechanisms related to adrenergic activation. PMID:23407214

  14. [Imaging of acute pelvic pain in women].

    PubMed

    Genevois, A; Marouteau, N; Lemercier, E; Dacher, J N; Thiebot, J

    2008-01-01

    Acute pelvic pain in women is a routine situation in any emergency unit. The radiologist should know how to explore the patient with regards to the history and clinical findings. Ultrasonography is the primary and sometimes the only necessary imaging tool in the assessment of acute pelvic pain in women. MRI is the preferred technique in pregnant or young women. CT is more valuable for assessing nongynecologic disorders or post-partum and post-operative infections. This article reviews the contribution of each imaging technique in this clinical situation. Emphasis is put on the importance of age and clinical findings in the diagnostic strategy. PMID:18288036

  15. Analyzing acute procedural pain in clinical trials.

    PubMed

    Lang, Elvira V; Tan, Gabriel; Amihai, Ido; Jensen, Mark P

    2014-07-01

    Because acute procedural pain tends to increase with procedure time, assessments of pain management strategies must take that time relationship into account. Statistical time-course analyses are, however, complex and require large patient numbers to detect differences. The current study evaluated the abilities of various single and simple composite measures such as averaged pain or individual patient pain slopes to detect treatment effects. Secondary analyses were performed with the data from 3 prospective randomized clinical trials that assessed the effect of a self-hypnotic relaxation intervention on procedural pain, measured every 10-15 minutes during vascular/renal interventions, breast biopsies, and tumor embolizations. Single point-in-time and maximal pain comparisons were poor in detecting treatment effects. Linear data sets of individual patient slopes yielded the same qualitative results as the more complex repeated measures analyses, allowing the use of standard statistical approaches (eg, Kruskal-Wallis), and promising analyses of smaller subgroups, which otherwise would be underpowered. With nonlinear data, a simple averaged score was highly sensitive in detecting differences. Use of these 2 workable and relatively simple approaches may be a first step towards facilitating the development of data sets that could enable meta-analyses of data from acute pain trials. PMID:24731852

  16. Markov chain evaluation of acute postoperative pain transition states.

    PubMed

    Tighe, Patrick J; Bzdega, Matthew; Fillingim, Roger B; Rashidi, Parisa; Aytug, Haldun

    2016-03-01

    Previous investigations on acute postoperative pain dynamicity have focused on daily pain assessments, and so were unable to examine intraday variations in acute pain intensity. We analyzed 476,108 postoperative acute pain intensity ratings, which were clinically documented on postoperative days 1 to 7 from 8346 surgical patients using Markov chain modeling to describe how patients are likely to transition from one pain state to another in a probabilistic fashion. The Markov chain was found to be irreducible and positive recurrent, with no absorbing states. Transition probabilities ranged from 0.0031, for the transition from state 10 to state 1, to 0.69 for the transition from state 0 to state 0. The greatest density of transitions was noted in the diagonal region of the transition matrix, suggesting that patients were generally most likely to transition to the same pain state as their current state. There were also slightly increased probability densities in transitioning to a state of asleep or 0 from the current state. An examination of the number of steps required to traverse from a particular first pain score to a target state suggested that overall, fewer steps were required to reach a state of 0 (range 6.1-8.8 steps) or asleep (range 9.1-11) than were required to reach a mild pain intensity state. Our results suggest that using Markov chains is a feasible method for describing probabilistic postoperative pain trajectories, pointing toward the possibility of using Markov decision processes to model sequential interactions between pain intensity ratings, and postoperative analgesic interventions. PMID:26588689

  17. Does a view of nature promote relief from acute pain?

    PubMed

    Kline, Grace A

    2009-09-01

    Inadequate control of acute pain is a well-recognized and serious problem. Distraction is one of the methods used in adjunct with medications to relieve pain. Nature-related sensory stimuli are frequently used for both distraction and relaxation. The human response model that focuses on individual adaptation to health conditions is used in this article to guide an analysis of relevant studies. Four studies in clinical settings evaluated the effect of nature (as a visual stimulus) to determine whether it promoted relief of acute pain. All these studies also used audio stimuli (nature sounds or music). Distracting visual and auditory stimuli used together provided stronger evidence of pain reduction than when either type of stimulus was used alone. PMID:19755566

  18. Psychometric properties of the Brazilian version of the Pain Catastrophizing Scale for acute low back pain.

    PubMed

    Lopes, Renata Antunes; Dias, Rosângela Corrêa; Queiroz, Bárbara Zille de; Rosa, Nayza Maciel de Britto; Pereira, Leani de Souza Máximo; Dias, João Marcos Domingues; Magalhães, Lívia de Castro

    2015-05-01

    Measurement instruments of pain catastrophizing for middle-aged and elderly individuals are needed to understand its impact on low back pain. The goals were to cross-culturally adapt the Pain Catastrophizing Scale, assess the construct validity through Rasch analysis, and verify reliability and convergent validity of pain catastrophizing with psychosocial factors. 131 individuals aged 55 years and older with acute low back pain were interviewed . The intra-rater reliability was Kp = 0.80 and interrater Kp = 0.75. The Rasch analysis found adequate reliability coefficients (0.95 for items and 0.90 for individuals ). The separation index for the elderly was 2.95 and 4.59 items. Of the 13 items, one did not fit the model, which was justified in the sample evaluated. The pain catastrophizing correlated with most psychosocial factors. The instrument proved to be clinically useful. Subsequent studies should carry out the same analysis in different populations. PMID:26017211

  19. Direct intrawound administration of dimethylsulphoxide relieves acute pain in rats.

    PubMed

    Gautam, Mayank; Prasoon, Pranav; Kumar, Rahul; Singh, Anurag; Shrimal, Prawal; Ray, Subrata B

    2016-04-01

    Wounds associated with injuries such as burns can produce moderate to severe pain. Besides causing distress to the patient, unrelieved pain could delay healing owing to stress-related problems. Thus, pain needs to be treated as early as possible after injury. It was hypothesised that local treatment of wounds with appropriate analgesic drugs could attenuate pain. HOE 140, a bradykinin receptor antagonist, reduced acute inflammatory pain in rats after intrawound administration. In this study, the analgesic effect of dimethylsulphoxide (DMSO) was investigated in a similar hind-paw incision model in rats. An extremely small quantity (10 µl) of 100% DMSO was administered into the incision site just before closure of the wound. It persistently attenuated guarding behaviour in rats over a period of 3 days without affecting thermal hyperalgesia or allodynia. Accumulated evidence indicates that guarding is equivalent to pain at rest in humans. The possible mechanisms of the analgesic effect could be inhibition of C group of peripheral nerve fibres or even free radical scavenging. Healing of the wound was found to be normal at the end of the study period. In conclusion, DMSO could be useful in the treatment of acute pain resulting from tissue injuries such as burns. PMID:24750992

  20. Emergency pulpotomy in relieving acute dental pain among Tanzanian patients

    PubMed Central

    Nyerere, Joachim W; Matee, Mecky I; Simon, Elison NM

    2006-01-01

    Background In Tanzania, oral health services are mostly in the form of dental extractions aimed at alleviating acute dental pain. Conservative methods of alleviating acute dental pain are virtually non-existent. Therefore, it was the aim of this study to determine treatment success of emergency pulpotomy in relieving acute dental pain. Methods Setting: School of Dentistry, Muhimbili National Hospital, Dar es Salaam, Tanzania. Study design: Longitudinal study. Participants: 180 patients who presented with dental pain due to acute irreversible pulpitis during the study period between July and August 2001. Treatment and evaluation: Patients were treated by emergency pulpotomy on permanent posterior teeth and were evaluated for pain after one, three and six week's post-treatment. Pain, if present, was categorised as either mild or acute. Results Of the patients with treated premolars, 25 (13.9%) patients did not experience pain at all while 19 (10.6%) experienced mild pain. None of the patients with treated premolars experienced acute pain. Among 136 patients with treated molars 56 (31%) did not experience any pain, 76 (42.2%) experienced mild pain and the other 4 (2.2%) suffered acute pain. Conclusion The short term treatment success of emergency pulpotomy was high being 100% for premolars and 97.1% for molars, suggesting that it can be recommended as a measure to alleviate acute dental pain while other conservative treatment options are being considered. PMID:16426455

  1. Acute chest pain emergencies - spouses' prehospital experiences.

    PubMed

    Forslund, Kerstin; Quell, Robin; Sørlie, Venke

    2008-10-01

    The call to the Emergency Medical Dispatch Centre is often a person's first contact with the health-care system in cases of acute illness or injury and acute chest pain is a common reason for calling. The aim was to illuminate how spouses to persons with acute chest pain experienced the alarm situation, the emergency call and the prehospital emergency care. Interviews were conducted with nineteen spouses. A phenomenological-hermeneutic approach was used for the analyses. The themes responsibility and uneasiness emerged as well as an overall theme of aloneness. Being a spouse to a person in need of acute medical and nursing assistance was interpreted as "Being responsible and trying to preserve life" and "Being able to manage the uneasiness and having trust in an uncertain situation." When their partners' life was at risk the spouses were in an escalating spiral of worry, uncertainty, stress, fear of loss, feeling of loneliness and desperation. They had to manage emotional distress and felt compelled to act to preserve life, a challenging situation. PMID:18929341

  2. Single dose dipyrone for acute postoperative pain

    PubMed Central

    Derry, Sheena; Faura, Clara; Edwards, Jayne; McQuay, Henry J; Moore, R Andrew

    2014-01-01

    Background Dipyrone (metamizole) is a non-steroidal anti-inflammatory drug used in some countries to treat pain (postoperative, colic, cancer, and migraine); it is banned in others because of an association with life-threatening blood agranulocytosis. This review updates a 2001 Cochrane review, and no relevant new studies were identified, but additional outcomes were sought. Objectives To assess the efficacy and adverse events of single dose dipyrone in acute postoperative pain. Search methods The earlier review searched CENTRAL, MEDLINE, EMBASE, LILACS and the Oxford Pain Relief Database to December 1999. For the update we searched CENTRAL, MEDLINE,EMBASE and LILACS to February 2010. Selection criteria Single dose, randomised, double-blind, placebo or active controlled trials of dipyrone for relief of established moderate to severe postoperative pain in adults. We included oral, rectal, intramuscular or intravenous administration of study drugs. Data collection and analysis Studies were assessed for methodological quality and data extracted by two review authors independently. Summed total pain relief over six hours (TOTPAR) was used to calculate the number of participants achieving at least 50% pain relief. Derived results were used to calculate, with 95% confidence intervals, relative benefit compared to placebo, and the number needed to treat (NNT) for one participant to experience at least 50% pain relief over six hours. Use and time to use of rescue medication were additional measures of efficacy. Information on adverse events and withdrawals was collected. Main results Fifteen studies tested mainly 500 mg oral dipyrone (173 participants), 2.5 g intravenous dipyrone (101), 2.5 g intramuscular dipyrone (99); fewer than 60 participants received any other dose. All studies used active controls (ibuprofen, paracetamol, aspirin, flurbiprofen, ketoprofen, dexketoprofen, ketorolac, pethidine, tramadol, suprofen); eight used placebo controls. Over 70% of participants

  3. A comparative analysis of the activity of ligands acting at P2X and P2Y receptor subtypes in models of neuropathic, acute and inflammatory pain

    PubMed Central

    Andó, RD; Méhész, B; Gyires, K; Illes, P; Sperlágh, B

    2010-01-01

    Background and purpose: This study was undertaken to compare the analgesic activity of antagonists acting at P2X1, P2X7, and P2Y12 receptors and agonists acting at P2Y1, P2Y2, P2Y4, and P2Y6 receptors in neuropathic, acute, and inflammatory pain. Experimental approach: The effect of the wide spectrum P2 receptor antagonist PPADS, the selective P2X7 receptor antagonist Brilliant Blue G (BBG), the P2X1 receptor antagonist (4,4′,4″,4-[carbonylbis(imino-5,1,3-benzenetriyl-bis(carbonylimino))]tetrakis-1,3-benzenedisulfonic acid, octasodium salt (NF449) and (8,8′-[carbonylbis(imino-3,1-phenylenecarbonylimino)]bis-1,3,5-naphthalene-trisulphonic acid, hexasodium salt (NF023), the P2Y12 receptor antagonist (2,2-dimethyl-propionic acid 3-(2-chloro-6-methylaminopurin-9-yl)-2-(2,2-dimethyl-propionyloxymethyl)-propylester (MRS2395), the selective P2Y1 receptor agonist ([[(1R,2R,3S,4R,5S)-4-[6-amino-2-(methylthio)-9H-purin-9-yl]-2,3-dihydroxybicyclo[3.1.0]hex-1-yl]methyl] diphosphoric acid mono ester trisodium salt (MRS2365), the P2Y2/P2Y4 agonist uridine-5′-triphosphate (UTP), and the P2Y4/P2Y6 agonist uridine-5′-diphosphate (UDP) were examined on mechanical allodynia in the Seltzer model of neuropathic pain, on acute thermal nociception, and on the inflammatory pain and oedema induced by complete Freund's adjuvant (CFA). Key results: MRS2365, MRS2395 and UTP, but not the other compounds, significantly alleviated mechanical allodynia in the neuropathic pain model, with the following rank order of minimal effective dose (mED) values: MRS2365 > MRS2395 > UTP. All compounds had a dose-dependent analgesic action in acute pain except BBG, which elicited hyperalgesia at a single dose. The rank order of mED values in acute pain was the following: MRS2365 > MRS2395 > NF449 > NF023 > UDP = UTP > PPADS. MRS2365 and MRS2395 had a profound, while BBG had a mild effect on inflammatory pain, with a following rank order of mED values: MRS2395 > MRS2365 > BBG. None of the tested

  4. The analgesic and toxic effects of nornicotine enantiomers alone and in interaction with morphine in rodent models of acute and persistent pain

    PubMed Central

    Holtman, Joseph R.; Crooks, Peter A.; Johnson-Hardy, Jaime K.; Wala, Elzbieta P.

    2009-01-01

    Neuronal nicotinic acetylcholinic receptors (nAChR) are promising targets for the development of novel analgesics. Nicotine and other nAChR-agonists produce profound analgesia in rodent models of acute and persistent pain. However, significant side-effects are of concern. Nornicotine (N-desmethyl-nicotine) appears to activate different nAChR subtypes, has a better pharmacokinetic profile, and produces less toxicity than nicotine. Little is known about its analgesic properties. In the present study, the S(−)- and R(+)- enantiomers of nornicotine were characterized with regard to analgesia and side-effects profile. Efficacy was demonstrated in rat models of pain where central sensitization is involved: i.e. the chronic constriction nerve injury model of peripheral neuropathy and the formalin model of tonic inflammatory pain. The desirable (analgesic) properties resided predominantly in the S(−)- rather than the R(+)- enantiomer. In contrast, undesirable effects (motor in-coordination, reduced locomotor activity, ataxia) were more pronounced with the R(+)- enantiomer. This is an interesting finding, which may suggest separation of toxicity from analgesia by utilization of S(−)-enantiomer of nornicotine. Maximum analgesic effectiveness without significant side-effects was achieved when S(−)-nornicotine (sub-analgesic dose) was combined with a low-dose of the μ-opioid, morphine. These preclinical data suggest that S(−)-nornicotine may be of value, either alone or in combination with an opioid, for treatment of a broad-spectrum of pain (i.e. nociceptive, neuropathic, mixed pain). PMID:19800911

  5. [Acute pain in children and its treatment].

    PubMed

    Dalens, B

    1991-01-01

    Pain in paediatrics has long been underestimated. The numerous scientific studies carried out during the last decade show that its existence can no longer be doubted: in fact, pain already exists during the neonatal period, and probably throughout the last trimester of gestation as well. Pain pathways mature during the embryonic period and peripheral receptors develop between the 7th and 20th week. A-delta and C fibers, as well as spinal roots and nerves, are completely differentiated before the end of the second month. The development of specific neurotransmitters and thalamic and cortical dendritic branching occurs later on; it is well enough developed to allow perception of painful stimuli (slow or protopathic component) from the beginning of the foetal period onwards. The discriminative rapid component develops in parallel to myelinisation, and the psycho-affective component, which requires a long and complex learning process, will not be fully operative until the end of puberty. Assessing pain, already a difficult task in the adult, is all the more so in children because of lesser verbal communicative capabilities, difficulty in handling abstract concepts, lack of experience of painful stimuli to make comparisons, and ignorance of their body image. In the very young child, diagnosing pain relies on suggestive circumstances, and an altered behaviour, knowing that no one symptom in pathognomonic. As the child grows up, methods for self-assessment of pain become usable, such as coloured scales and simplified verbal scales. However, behavioural tests remain the mainstay until the prepubertal period. The treatment of acute pain requires a reasoned approach which takes into account the state of the child, that of the aetiological investigations, the likely course of the lesions, as well as the patient's analgesic requirements. Therapeutic means do not differ from those for adult patients; however, the differences of distribution of body water, the small

  6. Acute psychosocial stress reduces pain modulation capabilities in healthy men.

    PubMed

    Geva, Nirit; Pruessner, Jens; Defrin, Ruth

    2014-11-01

    Anecdotes on the ability of individuals to continue to function under stressful conditions despite injuries causing excruciating pain suggest that acute stress may induce analgesia. However, studies exploring the effect of acute experimental stress on pain perception show inconsistent results, possibly due to methodological differences. Our aim was to systematically study the effect of acute stress on pain perception using static and dynamic, state-of-the-art pain measurements. Participants were 29 healthy men who underwent the measurement of heat-pain threshold, heat-pain intolerance, temporal summation of pain, and conditioned pain modulation (CPM). Testing was conducted before and during exposure to the Montreal Imaging Stress Task (MIST), inducing acute psychosocial stress. Stress levels were evaluated using perceived ratings of stress and anxiety, autonomic variables, and salivary cortisol. The MIST induced a significant stress reaction. Although pain threshold and pain intolerance were unaffected by stress, an increase in temporal summation of pain and a decrease in CPM were observed. These changes were significantly more robust among individuals with stronger reaction to stress ("high responders"), with a significant correlation between the perception of stress and the performance in the pain measurements. We conclude that acute psychosocial stress seems not to affect the sensitivity to pain, however, it significantly reduces the ability to modulate pain in a dose-response manner. Considering the diverse effects of stress in this and other studies, it appears that the type of stress and the magnitude of its appraisal determine its interactions with the pain system. PMID:25250721

  7. Topical NSAIDs for acute pain in adults

    PubMed Central

    Massey, Thomas; Derry, Sheena; Moore, R Andrew; McQuay, Henry J

    2014-01-01

    Background Use of topical NSAIDs to treat acute musculoskeletal conditions is widely accepted in some parts of the world, but not in others. Their main attraction is their potential to provide pain relief without associated systemic adverse events. Objectives To review the evidence from randomised, double-blind, controlled trials on the efficacy and safety of topically applied NSAIDs in acute pain. Search methods We searched MEDLINE, EMBASE, The Cochrane Library, and our own in-house database to December 2009. We sought unpublished studies by asking personal contacts and searching on-line clinical trial registers and manufacturers web sites. Selection criteria We included randomised, double-blind, active or placebo (inert carrier)-controlled trials in which treatments were administered to adult patients with acute pain resulting from strains, sprains or sports or overuse-type injuries (twisted ankle, for instance). There had to be at least 10 participants in each treatment arm, with application of treatment at least once daily. Data collection and analysis Two review authors independently assessed trial quality and validity, and extracted data. Numbers of participants achieving each outcome were used to calculate relative risk and numbers needed to treat (NNT) or harm (NNH) compared to placebo or other active treatment. Main results Forty-seven studies were included; most compared topical NSAIDs in the form of a gel, spray, or cream with a similar placebo, with 3455 participants in the overall analysis of efficacy. For all topical NSAIDs combined, compared with placebo, the number needed to treat to benefit (NNT) for clinical success, equivalent to 50% pain relief, was 4.5 (3.9 to 5.3) for treatment periods of 6 to 14 days. Topical diclofenac, ibuprofen, ketoprofen, and piroxicam were of similar efficacy, but indomethacin and benzydamine were not significantly better than placebo. Local skin reactions were generally mild and transient, and did not differ from

  8. [Excruciating flank pain: "acute renal colic"].

    PubMed

    Thomas, A; Andrianne, R

    2004-04-01

    The classic presentation of acute renal colic is the sudden onset of very severe pain in the flank primarily caused by the acute ureteral obstruction. The diagnosis is often made on clinical symptoms only, although confirmatory exams are generally performed because many others significant disorders may present with symptom of flank pain that mimics renal colic. Life threatening emergency such as abdominal aortic aneurysm must be ruled out. While non contrast CT has become the standard imaging modality, in some situations, a plain abdominal radiograph associated with a renal ultrasound or a contrast study such as intravenous pyelogram may be preferred. Hematuria is frequently present on urine analysis. The usual therapy represented by analgesic and nonsteroidal anti-inflammatory drugs should be started as soon as possible. Size and location of the stone are the most important predictors of spontaneous passage. Uncontrolled pain by medical therapy, fever, oligo-anuria suggest complicated stone disease. Such conditions require emergency treatment by drainage or stone extraction. Although recurrent stone rate is important, extensive metabolic explorations are not recommended after an uncomplicated first episode. Nevertheless fluid intake is encouraged and a stone chemical analysis should be performed whenever possible. PMID:15182032

  9. Pharmacological and pharmacokinetic characterization of the cannabinoid receptor 2 agonist, GW405833, utilizing rodent models of acute and chronic pain, anxiety, ataxia and catalepsy.

    PubMed

    Valenzano, Kenneth J; Tafesse, Laykea; Lee, Gary; Harrison, James E; Boulet, Jamie M; Gottshall, Susan L; Mark, Lilly; Pearson, Michelle S; Miller, Wendy; Shan, Shen; Rabadi, Leyana; Rotshteyn, Yakov; Chaffer, Suzanne M; Turchin, Paul I; Elsemore, David A; Toth, Mathew; Koetzner, Lee; Whiteside, Garth T

    2005-04-01

    To date, two cannabinoid receptors have been identified, CB1 and CB2. Activation of these receptors with non-selective cannabinoid receptor agonists reduces pain sensitivity in animals and humans. However, activation of CB1 receptors is also associated with central side effects, including ataxia and catalepsy. More recently, a role for selective CB2 agonists in pain modification has been demonstrated. GW405833, a selective CB2 agonist, was recently reported to partially reverse the inflammation and hyperalgesia in a rat model of acute inflammation. In the current report, we extend the characterization and therapeutic potential of this compound. For the first time, we show that GW405833 selectively binds both rat and human CB2 receptors with high affinity, where it acts as a partial agonist (approximately 50% reduction of forskolin-mediated cAMP production compared to the full cannabinoid agonist, CP55,940). We also report for the first time that intraperitoneal administration of GW405833 (0.3-100 mg/kg) to rats shows linear, dose-dependent increases in plasma levels and substantial penetration into the central nervous system. In addition, GW405833 (up to 30 mg/kg) elicits potent and efficacious antihyperalgesic effects in rodent models of neuropathic, incisional and chronic inflammatory pain, the first description of this compound in these models. In contrast, analgesia, sedation and catalepsy were not observed in this dose range, but were apparent at 100 mg/kg. Additionally, GW405833 was not antihyperalgesic against chronic inflammatory pain in CB2 knockout mice. These data support the tenet that selective CB2 receptor agonists have the potential to treat pain without eliciting the centrally-mediated side effects associated with non-selective cannabinoid agonists, and highlight the utility of GW405833 for the investigation of CB2 physiology. PMID:15814101

  10. Single dose oral ibuprofen for acute postoperative pain in adults

    PubMed Central

    Derry, Christopher J; Derry, Sheena; Moore, R Andrew; McQuay, Henry J

    2014-01-01

    Background This review updates a 1999 Cochrane review showing that ibuprofen at various doses was effective in postoperative pain in single dose studies designed to demonstrate analgesic efficacy. New studies have since been published. Ibuprofen is one of the most widely used non-steroidal anti-inflammatory (NSAID) analgesics both by prescription and as an over-the-counter medicine. Ibuprofen is used for acute and chronic painful conditions. Objectives To assess analgesic efficacy of ibuprofen in single oral doses for moderate and severe postoperative pain in adults. Search methods We searched Cochrane CENTRAL, MEDLINE, EMBASE and the Oxford Pain Relief Database for studies to May 2009. Selection criteria Randomised, double blind, placebo-controlled trials of single dose orally administered ibuprofen (any formulation) in adults with moderate to severe acute postoperative pain. Data collection and analysis Two review authors independently assessed trial quality and extracted data. Pain relief or pain intensity data were extracted and converted into the dichotomous outcome of number of participants with at least 50% pain relief over 4 to 6 hours, from which relative risk and number-needed-to-treat-to-benefit (NNT) were calculated. Numbers of participants using rescue medication over specified time periods, and time to use of rescue medication, were sought as additional measures of efficacy. Information on adverse events and withdrawals were collected. Main results Seventy-two studies compared ibuprofen and placebo (9186 participants). Studies were predominantly of high reporting quality, and the bulk of the information concerned ibuprofen 200 mg and 400 mg. For at least 50% pain relief compared with placebo the NNT for ibuprofen 200 mg (2690 participants) was 2.7 (2.5 to 3.0) and for ibuprofen 400 mg (6475 participants) it was 2.5 (2.4 to 2.6). The proportion with at least 50% pain relief was 46% with 200 mg and 54% with 400 mg. Remedication within 6 hours was less

  11. Acute pain management curriculum for emergency medicine residency programs.

    PubMed

    Motov, Sergey M; Marshall, John P

    2011-10-01

    Pain is the most common reason people visit emergency departments (EDs); this implies that emergency physicians (EPs) should be experts in managing acute painful conditions. The current trend in the literature, however, demonstrates that EPs possess inadequate knowledge and lack formal training in acute pain management. The purpose of this article is to create a formal educational curriculum that would assist emergency medicine (EM) residents in proper assessment and treatment of acute pain, as well as in providing a solid theoretical and practical knowledge base for managing acute pain in the ED. The authors propose a series of lectures, case-oriented study groups, practical small group sessions, and class-specific didactics with the goal of enhancing the theoretical and practical knowledge of acute pain management in the ED. PMID:21692900

  12. Does weather affect daily pain intensity levels in patients with acute low back pain? A prospective cohort study.

    PubMed

    Duong, Vicky; Maher, Chris G; Steffens, Daniel; Li, Qiang; Hancock, Mark J

    2016-05-01

    The aim of this study was to investigate the influence of various weather parameters on pain intensity levels in patients with acute low back pain (LBP). We performed a secondary analysis using data from the PACE trial that evaluated paracetamol (acetaminophen) in the treatment of acute LBP. Data on 1604 patients with LBP were included in the analysis. Weather parameters (precipitation, temperature, relative humidity, and air pressure) were obtained from the Australian Bureau of Meteorology. Pain intensity was assessed daily on a 0-10 numerical pain rating scale over a 2-week period. A generalised estimating equation analysis was used to examine the relationship between daily pain intensity levels and weather in three different time epochs (current day, previous day, and change between previous and current days). A second model was adjusted for important back pain prognostic factors. The analysis did not show any association between weather and pain intensity levels in patients with acute LBP in each of the time epochs. There was no change in strength of association after the model was adjusted for prognostic factors. Contrary to common belief, the results demonstrated that the weather parameters of precipitation, temperature, relative humidity, and air pressure did not influence the intensity of pain reported by patients during an episode of acute LBP. PMID:26759130

  13. ACUTE PELVIC PAIN IN THE ADOLESCENT: A CASE REPORT

    PubMed Central

    Samuels-Kalow, M.; Mollen, C.

    2015-01-01

    Diagnosis and treatment of acute pelvic pain in the adolescent female requires differentiating among a broad differential diagnosis that includes potentially serious illness across several organ systems. The case presented provides an illustration of the assessment and management of acute pelvic pain, and key teaching points about important potential causes. PMID:26273230

  14. Respiratory symptoms and acute painful episodes in sickle cell disease.

    PubMed

    Jacob, Eufemia; Sockrider, Marianna M; Dinu, Marlen; Acosta, Monica; Mueller, Brigitta U

    2010-01-01

    The authors examined the prevalence of respiratory symptoms and determined whether respiratory symptoms were associated with prevalence of chest pain and number of acute painful episodes in children and adolescents with sickle cell disease. Participants (N = 93; 44 females, 49 males; mean age 9.8 +/- 4.3 years) reported coughing in the morning (21.5%), at night (31.2%), and during exercise (30.1%). Wheezing occurred both when they had a cold or infection (29.0%) and when they did not have (23.7%) a cold or infection. Sleep was disturbed by wheezing in 20.4%. Among the 76 patients who were school-age (>5 years), 19.7% of patients missed more than 4 days of school because of respiratory symptoms. The majority of patients reported having acute painful episodes (82.8%), and most (66.7%) reported having chest pain during acute painful episodes in the previous 12 months. Participants with acute pain episodes greater than 3 during the previous 12 months had significantly higher reports of breathing difficulties (P = .01) and chest pain (P = .002). The high number of respiratory symptoms (cough and wheeze) among patients with sickle cell disease may trigger acute painful episodes. Early screening and recognition, ongoing monitoring, and proactive management of respiratory symptoms may minimize the number of acute painful episodes. PMID:20038672

  15. Substance P and Acute Pain in Patients Undergoing Orthopedic Surgery

    PubMed Central

    Lisowska, Barbara; Siewruk, Katarzyna; Lisowski, Aleksander

    2016-01-01

    Objective There is a limited information about the role of Substance P (SP) in acute pain nociception following surgical stimulation in patients with a chronic inflammatory state not to mention the link between this neuropeptide level changes and intensity of pain. The goal of the research was to find the correlation between SP level changes and acute pain intensity in patients with rheumatoid arthritis undergoing elective orthopedic surgery. Material and Methods Patients with rheumatoid arthritis (RA) were enrolled in the study. The correlation between acute pain intensity and concentration of SP in serum as well as in drainage fluid from postoperative wound was assessed in patients with RA who underwent Total Knee Replacement (TKA) under spinal anesthesia. Results In patients with RA a correlation between intensity of acute pain and serum SP was found postoperatively, whereas there was no correlation between intensity of acute pain and concentration of SP in drainage fluid. Conclusions 1. The correlation between acute pain intensity and SP serum concentration was found postoperatively in patients with RA. 2. The correlation between acute pain intensity and SP concentration in drainage fluid was not found postoperatively in patients with RA. PMID:26731421

  16. DoD–NCCAM/NIH Workshop on Acupuncture for Treatment of Acute Pain

    PubMed Central

    Belard, Jean Louis; Glowa, John; Khalsa, Partap; Weber, Wendy; Huntley, Kristen

    2013-01-01

    Abstract The Department of Defense (DoD) and the National Center for Complementary and Alternative Medicine (NCCAM) at the National Institutes of Health (NIH) cosponsored a workshop that explored the possible benefits of acupuncture treatment for acute pain. One goal of the workshop was to establish a roadmap to building an evidence base on that would indicate whether acupuncture is helpful for treating active-duty military personnel experiencing acute pain. The workshop highlighted brief presentations on the most current research on acupuncture and acute pain mechanisms. The impact of various modifiers (stress, genetics, population, phenotypes, etc.) on acute pain pathways and response to acupuncture treatment was discussed. Additional presentations focused on common neural mechanisms, an overview of real-world experience with using acupuncture to treat traumatic acute pain, and best tools and methods specific for acupuncture studies. Three breakout groups addressed the gaps, opportunities, and barriers to acupuncture use for acute pain in military and trauma settings. Different models of effectiveness research and optimal research designs for conducting trials in acute traumatic pain were also discussed. PMID:23020611

  17. Responses to acute pain and the nursing implications.

    PubMed

    Wells, N

    1984-01-01

    Management of acute pain offers many techniques--peripherally, to reduce the sensory input from the nociceptors and ascending fibres, and centrally by altering cognition, evaluation and emotional arousal to the sensory input. Scientifically-based nursing intervention is imperative. Therefore, nurses needed a better understanding of recent research regarding pain. As well, recognition that all individuals express and cope with pain in different ways, and therefore exhibit different pain behaviours, is necessary if effective nursing care is to be given. Finally, with all the interacting variables and methods of intervention available, pain medication should never be the only intervention used for the patient with pain. PMID:6142910

  18. Acetazolamide attenuates chemical-stimulated but not thermal-stimulated acute pain in mice

    PubMed Central

    Sun, Ya-jie; Chen, Ying; Pang, Chong; Wu, Ning; Li, Jin

    2014-01-01

    Aim: Acetazolamide (AZA), a carbonic anhydrase (CA) inhibitor, has been found to alleviate inflammatory and neuropathic pain in rats. In the present study, we investigated the effects of AZA on thermal- and chemical-stimulated acute pain in mice and the possible mechanisms underlying the effects. Methods: Five acute pain models based on thermal and chemical stimuli were established to investigate the effects of AZA on different types of nociception in mice. The antinociceptive effects of methazolamide (another CA inhibitor) and diazepam (a positive allosteric modulator of GABAA receptor) were also examined. The drugs were administered either intraperitoneally (ip) or intrathecally. Results: AZA (50–200 mg/kg, ip) did not produce analgesia in two thermal-stimulated acute pain models, ie, mouse tail-flick and hot-plate tests. In contrast, AZA (50–200 mg/kg, ip) dose-dependently reduced paw licking time in both capsaicin and formalin tests in mice. A similar result was observed in a mouse acetic acid-induced writhing test. However, AZA (10 nmol/mouse, intrathecally) did not produce significant analgesia in the 3 chemical-stimulated acute pain models. In addition, methazolamide (50–200 mg/kg, ip) and diazepam (0.25–1.0 mg/kg, ip) did not produce significant analgesia in either thermal- or chemical-stimulated acute pain. Conclusion: AZA produces analgesia in chemical-stimulated, but not thermal-stimulated acute pain in mice. The attenuation of chemical-stimulated acute pain by AZA may not be due to enhancement of GABAA receptor-mediated inhibition via inhibiting CA activity but rather a peripheral ion channel-related mechanism. PMID:24335844

  19. Topical analgesics in the management of acute and chronic pain.

    PubMed

    Argoff, Charles E

    2013-02-01

    Oral analgesics are commonly prescribed for the treatment of acute and chronic pain, but these agents often produce adverse systemic effects, which sometimes are severe. Topical analgesics offer the potential to provide the same analgesic relief provided by oral analgesics but with minimal adverse systemic effects. This article describes the results of a systematic review of the efficacy of topical analgesics in the management of acute and chronic pain conditions. A literature search of MEDLINE/PubMed was conducted using the keywords topical analgesic AND chronic pain OR acute pain OR neuropathic pain and focused only on individual clinical trials published in English-language journals. The search identified 92 articles, of which 65 were eligible for inclusion in the review. The most commonly studied topical analgesics were nonsteroidal anti-inflammatory drugs (n=27), followed by lidocaine (n=9), capsaicin (n=6), amitriptyline (n=5), glyceryl trinitrate (n=3), opioids (n=2), menthol (n=2), pimecrolimus (n=2), and phenytoin (n=2). The most common indications were acute soft tissue injuries (n=18), followed by neuropathic pain (n=17), experimental pain (n=6), osteoarthritis and other chronic joint-related conditions (n=5), skin or leg ulcers (n=5), and chronic knee pain (n=2). Strong evidence was identified for the use of topical diclofenac and topical ibuprofen in the treatment of acute soft tissue injuries or chronic joint-related conditions, such as osteoarthritis. Evidence also supports the use of topical lidocaine in the treatment of postherpetic neuralgia and diabetic neuropathy. Currently, limited evidence is available to support the use of other topical analgesics in acute and chronic pain. PMID:23374622

  20. Acute Pain Medicine in the United States: A Status Report

    PubMed Central

    Tighe, Patrick; Buckenmaier, Chester C.; Boezaart, Andre P.; Carr, Daniel B.; Clark, Laura L.; Herring, Andrew A.; Kent, Michael; Mackey, Sean; Mariano, Edward R.; Polomano, Rosemary C.; Reisfield, Gary M.

    2015-01-01

    Background Consensus indicates that a comprehensive, multimodal, holistic approach is foundational to the practice of acute pain medicine (APM), but lack of uniform, evidence-based clinical pathways leads to undesirable variability throughout U. S. healthcare systems. Acute pain studies are inconsistently synthesized to guide educational programs. Advanced practice techniques involving regional anesthesia assume the presence of a physician-led, multidisciplinary acute pain service, which is often unavailable or inconsistently applied. This heterogeneity of educational and organizational standards may result in unnecessary patient pain and escalation of healthcare costs. Methods A multidisciplinary panel was nominated through the Acute Pain Medicine Shared Interest Group (APMSIG) of the American Academy of Pain Medicine (AAPM). The panel met in Chicago, Illinois, in July 2014, to identify gaps and set priorities in APM research and education. Results The panel identified 3 areas of critical need: 1) an open-source acute pain data registry and clinical support tool to inform clinical decision making and resource allocation and to enhance research efforts; 2) a strong professional APM identity as an accredited subspecialty; and 3) educational goals targeted toward third-party payers, hospital administrators, and other key stakeholders to convey the importance of APM. Conclusion This report is the first step in a 3-year initiative aimed at creating conditions and incentives for the optimal provision of APM services to facilitate and enhance the quality of patient recovery after surgery, illness, or trauma. The ultimate goal is to reduce the conversion of acute pain to the debilitating disease of chronic pain. PMID:26535424

  1. A Lens Model Approach to the Communication of Pain.

    PubMed

    Ruben, Mollie A; Hall, Judith A

    2016-08-01

    Two studies examined the expression and detection of suppressed, genuine, and exaggerated pain. In Study 1, videotaped participants underwent an acute laboratory pain stressor and completed pain ratings. In Study 2, the lens model examined the cues encoders displayed while in pain (facial expressions of pain and viewers' global impressions), the cues decoders used to infer pain in the videotaped encoders, and decoders' accuracy in making judgments of pain. Results revealed expression differences between the suppressed, genuine, and exaggerated pain such that exaggerated expressions contained more tightened facial expressions while genuine expressions of pain contained more open facial expressions of pain. Decoders were accurate at detecting pain only in the exaggerated pain expressions. These results highlight the need for improving providers' accuracy in detecting pain intensity for suppressed, genuine, and exaggerated pain displays. Trainings should focus on teaching providers that patients who appear more agitated and less composed may be suppressing pain, while patients who appear more tense and determined may be exaggerating pain. Finally, patients who seem to not be in that much pain because they are not showing tightened facial expressions may actually be experiencing higher intensities of genuine pain. PMID:26752199

  2. Plant Derived Aporphinic Alkaloid S-(+)-Dicentrine Induces Antinociceptive Effect in Both Acute and Chronic Inflammatory Pain Models: Evidence for a Role of TRPA1 Channels

    PubMed Central

    Montrucchio, Deise Prehs; Córdova, Marina Machado; Soares Santos, Adair Roberto

    2013-01-01

    S-(+)-Dicentrine is an aporphinic alkaloid found in several plant species, mainly from Lauraceae family, which showed significant antinociceptive activity in an acute model of visceral pain in mice. In this work, we extended the knowledge on the antinociceptive properties of S-(+)-dicentrine and showed that this alkaloid also attenuates mechanical and cold hypersensitivity associated with cutaneous inflammation induced by Complete Freund’s Adjuvant in mice. Given orally, S-(+)-dicentrine (100 mg/kg) reversed CFA-induced mechanical hypersensitivity, evaluated as the paw withdrawal threshold to von Frey hairs, and this effect lasted up to 2 hours. S-(+)-Dicentrine also reversed CFA-induced cold hypersensitivity, assessed as the responses to a drop of acetone in the injured paw, but did not reverse the heat hypersensitivity, evaluated as the latency time to paw withdrawal in the hot plate (50°C). Moreover, S-(+)-dicentrine (100 mg/kg, p.o.) was effective in inhibit nociceptive responses to intraplantar injections of cinnamaldehyde, a TRPA1 activator, but not the responses induced by capsaicin, a TRPV1 activator. When administered either by oral or intraplantar routes, S-(+)-dicentrine reduced the licking time (spontaneous nociception) and increased the latency time to paw withdrawal in the cold plate (cold hypersensitivity), both induced by the intraplantar injection of cinnamaldehyde. Taken together, our data adds information about antinociceptive properties of S-(+)-dicentrine in inflammatory conditions, reducing spontaneous nociception and attenuating mechanical and cold hypersensitivity, probably via a TRPA1-dependent mechanism. It also indicates that S-(+)-dicentrine might be potentially interesting in the development of new clinically relevant drugs for the management of persistent pain, especially under inflammatory conditions. PMID:23861794

  3. Thermoregulatory vasomotor tone of the rat tail and paws in thermoneutral conditions and its impact on a behavioral model of acute pain.

    PubMed

    El Bitar, Nabil; Pollin, Bernard; Karroum, Elias; Pincedé, Ivanne; Mouraux, André; Le Bars, Daniel

    2014-11-01

    The tail and paws in rodents are heat exchangers involved in the maintenance of core body temperature (T(core)). They are also the most widely used target organs to study acute or chronic "models" of pain. We describe the fluctuations of vasomotor tone in the tail and paws in conditions of thermal neutrality and the constraints of these physiological processes on the responses to thermal nociceptive stimuli, commonly used as an index of pain. Skin temperatures were recorded with a calibrated thermal camera to monitor changes of vasomotor tone in the tail and paws of awake and anesthetized rats. In thermoneutral conditions, the sympathetic tone fluctuated at a rate of two to seven cycles/h. Increased mean arterial blood pressure (MAP; ∼46 mmHg) was followed by increased heart rate (HR; ∼45 beats/min) within 30 s, vasoconstriction of extremities (3.5-7°C range) within 3-5 min, and increased T(core) (∼0.7°C) within 6 min. Decreased MAP was followed by opposite events. There was a high correlation between HR and T(core) recorded 5-6 min later. The reaction time of the animal's response to a radiant thermal stimulus-heat ramp (6°C/s, 20 mm(2) spot) generated by a CO2 laser-directed to the tail depends on these variations. Consequently, the fluctuations in tail and paw temperature thus represent a serious confound for thermal nociceptive tests, particularly when they are conducted at thermal neutrality. PMID:25008410

  4. Chest Pain in Adolescent Japanese Male Mimicking Acute Coronary Syndrome

    PubMed Central

    Gupta, Sachin K.; Naheed, Zahra

    2014-01-01

    Acute chest pain with very elevated troponin level and abnormal EKG in adult population is considered sine qua non to acute coronary syndrome (ACS) unless proved otherwise. Similar presentation in adolescent population is seen less often but raises suspicion for ACS. Most common etiology for chest pain with cardiac enzyme elevation in adolescent population is usually viral myopericarditis. The adolescent population presenting with chest pain and elevated cardiac enzymes should be carefully evaluated for ACS and other etiologies including myocarditis, myopericarditis, pulmonary embolism, acute rheumatic fever, and trauma. We report one Japanese adolescent male with mycoplasma pneumoniae myocarditis who presented to the ER with chest pain, elevated cardiac enzymes, and abnormal EKG. PMID:25202456

  5. Acupuncture Anesthesia and Analgesia for Clinical Acute Pain in Japan

    PubMed Central

    2008-01-01

    Acupuncture anesthesia has been practiced in China since about 1960. In Japan, Hyodo reported 30 cases of acupuncture anesthesia in 1972. However, from around 1980, the direction of acupuncture investigations turned from anesthesia to analgesia. Acupuncture analgesia is presently considered a way to activate the body's endogenous analgesic system. Recently, with the rise of acupuncture as one of the most well known CAM therapies, acupuncture or moxibustion treatment has been reported for both acute and chronic pain. Even so, few clinical reports and original articles have been reported in Japan. This review illustrates how acupuncture is being used in Japan for acute pain such as surgical operations, post- operative pain (POP), neuropathic pain, pain associated with teeth extractions and after the extraction of impacted wisdom teeth. PMID:18604250

  6. Pain-related psychological correlates of pediatric acute post-surgical pain

    PubMed Central

    Pagé, M Gabrielle; Stinson, Jennifer; Campbell, Fiona; Isaac, Lisa; Katz, Joel

    2012-01-01

    Background Post-surgical pain is prevalent in children, yet is significantly understudied. The goals of this study were to examine gender differences in pain outcomes and pain-related psychological constructs postoperatively and to identify pain-related psychological correlates of acute post-surgical pain (APSP) and predictors of functional disability 2 weeks after hospital discharge. Methods Eighty-three children aged 8–18 (mean 13.8 ± 2.4) years who underwent major orthopedic or general surgery completed pain and pain-related psychological measures 48–72 hours and 2 weeks after surgery. Results Girls reported higher levels of acute postoperative anxiety and pain unpleasantness compared with boys. In addition, pain anxiety was significantly associated with APSP intensity and functional disability 2 weeks after discharge, whereas pain catastrophizing was associated with APSP unpleasantness. Conclusion These results highlight the important role played by pain-related psychological factors in the experience of pediatric APSP by children and adolescents. PMID:23204864

  7. Quick identification of acute chest pain patients study (QICS)

    PubMed Central

    Willemsen, Hendrik M; de Jong, Gonda; Tio, René A; Nieuwland, Wybe; Kema, Ido P; van der Horst, Iwan CC; Oudkerk, Mattijs; Zijlstra, Felix

    2009-01-01

    Background Patients with acute chest pain are often referred to the emergency ward and extensively investigated. Investigations are costly and could induce unnecessary complications, especially with invasive diagnostics. Nevertheless, chest pain patients have high mortalities. Fast identification of high-risk patients is crucial. Therefore several strategies have been developed including specific symptoms, signs, laboratory measurements, and imaging. Methods/Design The Quick Identification of acute Chest pain Study (QICS) will investigate whether a combined use of specific symptoms and signs, electrocardiography, routine and new laboratory measures, adjunctive imaging including electron beam (EBT) computed tomography (CT) and contrast multislice CT (MSCT) will have a high diagnostic yield for patients with acute chest pain. All patients will be investigated according a standardized protocol in the Emergency Department. Serum and plasma will be frozen for future analysis for a wide range of biomarkers at a later time point. The primary endpoint is the safe recognition of low-risk chest pain patients directly at presentation. Secondary endpoint is the identification of a wide range of sensitive predictive clinical markers, chemical biomarkers and radiological markers in acute chest pain patients. Chemical biomarkers will be compared to quantitative CT measurements of coronary atherosclerosis as a surrogate endpoint. Chemical biomarkers will also be compared in head to head comparison and for their additional value. Discussion This will be a very extensive investigation of a wide range of risk predictors in acute chest pain patients. New reliable fast and cheap diagnostic algorithm resulting from the test results might improve chest pain patients' prognosis, and reduce unnecessary costs and diagnostic complications. PMID:19527487

  8. [Mechanisms by which acute orofacial pain becomes chronic].

    PubMed

    Cahana, A; Forster, A

    2006-06-01

    Pain is a complex, multidimensional experience encompassing sensory-discriminative, cognitive, emotional and motivational dimensions. These dimensions in the orofacial region have particular expression since the face and mouth have special biological, emotional and psychological meaning to each individual. Orofacial pain is frequent. Epidemiological studies reveal a high prevalence of severe pain in syndromes such as temporomandibular disorders (TMD), burning mouth syndrome and toothaches, as well as an important role of psychosocial influences, contributing to the persistence of these syndromes. Many of the difficulties experienced by clinicians with the diagnosis and management of acute and chronic orofacial pain stem from a lack of recognition and understanding of these complex conditions, the various intricate bio-psycho-social interactions and the neurobiology behind the chronicisation of acute pain. This text strives to review the important advances and insights into the peripheral processes by which noxious stimuli activates or modulates nociceptive afferent input into the brainstem, the neural pathways in the brainstem and higher levels of the trigeminal (V) somatosensory system and the mechanisms involved in the plasticity of nociceptive transmission. We shall link this knowledge to clinical correlates and suggest a therapeutic approach in acute orofacial pain, in the attempt to avoid the development of chronic pain. PMID:16804482

  9. Acute psychosocial stress and emotion regulation skills modulate empathic reactions to pain in others.

    PubMed

    Buruck, Gabriele; Wendsche, Johannes; Melzer, Marlen; Strobel, Alexander; Dörfel, Denise

    2014-01-01

    Psychosocial stress affects resources for adequate coping with environmental demands. A crucial question in this context is the extent to which acute psychosocial stressors impact empathy and emotion regulation. In the present study, 120 participants were randomly assigned to a control group vs. a group confronted with the Trier Social Stress Test (TSST), an established paradigm for the induction of acute psychosocial stress. Empathy for pain as a specific subgroup of empathy was assessed via pain intensity ratings during a pain-picture task. Self-reported emotion regulation skills were measured as predictors using an established questionnaire. Stressed individuals scored significantly lower on the appraisal of pain pictures. A regression model was chosen to find variables that further predict the pain ratings. These findings implicate that acute psychosocial stress might impair empathic processes to observed pain in another person and the ability to accept one's emotion additionally predicts the empathic reaction. Furthermore, the ability to tolerate negative emotions modulated the relation between stress and pain judgments, and thus influenced core cognitive-affective functions relevant for coping with environmental challenges. In conclusion, our study emphasizes the necessity of reducing negative emotions in terms of empathic distress when confronted with pain of another person under psychosocial stress, in order to be able to retain pro-social behavior. PMID:24910626

  10. Acute psychosocial stress and emotion regulation skills modulate empathic reactions to pain in others

    PubMed Central

    Buruck, Gabriele; Wendsche, Johannes; Melzer, Marlen; Strobel, Alexander; Dörfel, Denise

    2014-01-01

    Psychosocial stress affects resources for adequate coping with environmental demands. A crucial question in this context is the extent to which acute psychosocial stressors impact empathy and emotion regulation. In the present study, 120 participants were randomly assigned to a control group vs. a group confronted with the Trier Social Stress Test (TSST), an established paradigm for the induction of acute psychosocial stress. Empathy for pain as a specific subgroup of empathy was assessed via pain intensity ratings during a pain-picture task. Self-reported emotion regulation skills were measured as predictors using an established questionnaire. Stressed individuals scored significantly lower on the appraisal of pain pictures. A regression model was chosen to find variables that further predict the pain ratings. These findings implicate that acute psychosocial stress might impair empathic processes to observed pain in another person and the ability to accept one's emotion additionally predicts the empathic reaction. Furthermore, the ability to tolerate negative emotions modulated the relation between stress and pain judgments, and thus influenced core cognitive-affective functions relevant for coping with environmental challenges. In conclusion, our study emphasizes the necessity of reducing negative emotions in terms of empathic distress when confronted with pain of another person under psychosocial stress, in order to be able to retain pro-social behavior. PMID:24910626

  11. Shaping attitudes to postoperative pain relief: the role of the acute pain team.

    PubMed

    McLeod, G A; Davies, H T; Colvin, J R

    1995-01-01

    Postoperative pain relief is often inadequate. Ignorance and misconceptions about opioids by ward staff contribute to this poor management. The introduction of acute pain teams has done much to improve pain relief for patients. It may also have contributed to changes in attitudes and knowledge of medical and nursing staff. We questioned 48 doctors and nurses on their knowledge and beliefs about postoperative pain relief. Staff members were questioned on two units, one with access to an acute pain team and one without. Over half those on the unit using traditional postoperative care thought patients did not receive adequate pain relief (58%). In comparison, only one respondent from the unit with the pain team thought this was the case (P < 0.001). More staff members that had experience of patient-controlled analgesia (PCA) were optimistic about its benefits than those in the unit with no experience; they were also less concerned about possible side effects. Only one respondent on the unit using PCA thought it carried a risk of drug dependence, compared to over half (55%) of those on the unit with no experience in this technique (P < 0.001). Over two-thirds of staff familiar with PCA thought nursing workload had decreased. Acute pain teams have an important role in educating ward staff. The impact of establishing such teams on staff knowledge and attitudes needs further study to ensure that they can carry out this role most effectively. PMID:7536228

  12. Support Vector Machine Diagnosis of Acute Abdominal Pain

    NASA Astrophysics Data System (ADS)

    Björnsdotter, Malin; Nalin, Kajsa; Hansson, Lars-Erik; Malmgren, Helge

    This study explores the feasibility of a decision-support system for patients seeking care for acute abdominal pain, and, specifically the diagnosis of acute diverticulitis. We used a linear support vector machine (SVM) to separate diverticulitis from all other reported cases of abdominal pain and from the important differential diagnosis non-specific abdominal pain (NSAP). On a database containing 3337 patients, the SVM obtained results comparable to those of the doctors in separating diverticulitis or NSAP from the remaining diseases. The distinction between diverticulitis and NSAP was, however, substantially improved by the SVM. For this patient group, the doctors achieved a sensitivity of 0.714 and a specificity of 0.963. When adjusted to the physicians' results, the SVM sensitivity/specificity was higher at 0.714/0.985 and 0.786/0.963 respectively. Age was found as the most important discriminative variable, closely followed by C-reactive protein level and lower left side pain.

  13. Single dose oral analgesics for acute postoperative pain in adults

    PubMed Central

    Moore, R Andrew; Derry, Sheena; McQuay, Henry J; Wiffen, Philip J

    2014-01-01

    Background Thirty-five Cochrane Reviews of randomised trials testing the analgesic efficacy of individual drug interventions in acute postoperative pain have been published. This overview brings together the results of all those reviews and assesses the reliability of available data. Objectives To summarise data from all Cochrane Reviews that have assessed the effects of pharmaceutical interventions for acute pain in adults with at least moderate pain following surgery, who have been given a single dose of oral analgesic taken alone. Methods We identified systematic reviews in The Cochrane Library through a simple search strategy. All reviews were overseen by a single Review Group, had a standard title, and had as their primary outcome numbers of participants with at least 50% pain relief over four to six hours compared with placebo. For individual reviews we extracted the number needed to treat (NNT) for this outcome for each drug/dose combination, and also the percentage of participants achieving at least 50% maximum pain relief, the mean of mean or median time to remedication, the percentage of participants remedicating by 6, 8, 12, or 24 hours, and results for participants experiencing at least one adverse event. Main results The overview included 35 separate Cochrane Reviews with 38 analyses of single dose oral analgesics tested in acute postoperative pain models, with results from about 45,000 participants studied in approximately 350 individual studies. The individual reviews included only high-quality trials of standardised design and outcome reporting. The reviews used standardised methods and reporting for both efficacy and harm. Event rates with placebo were consistent in larger data sets. No statistical comparison was undertaken. There were reviews but no trial data were available for acemetacin, meloxicam, nabumetone, nefopam, sulindac, tenoxicam, and tiaprofenic acid. Inadequate amounts of data were available for dexibuprofen, dextropropoxyphene 130

  14. The oral administration of trans-caryophyllene attenuates acute and chronic pain in mice.

    PubMed

    Paula-Freire, L I G; Andersen, M L; Gama, V S; Molska, G R; Carlini, E L A

    2014-02-15

    Trans-caryophyllene is a sesquiterpene present in many medicinal plants' essential oils, such as Ocimum gratissimum and Cannabis sativa. In this study, we evaluated the antinociceptive activity of trans-caryophyllene in murine models of acute and chronic pain and the involvement of trans-caryophyllene in the opioid and endocannabinoid systems. Acute pain was determined using the hot plate test (thermal nociception) and the formalin test (inflammatory pain). The chronic constriction injury (CCI) of the sciatic nerve induced hypernociception was measured by the hot plate and von Frey tests. To elucidate the mechanism of action, mice were pre-treated with naloxone or AM630 30 min before the trans-caryophyllene treatment. Afterwards, thermal nociception was evaluated. The levels of IL-1β were measured in CCI-mice by ELISA. Trans-caryophyllene administration significantly minimized the pain in both the acute and chronic pain models. The antinociceptive effect observed during the hot plate test was reversed by naloxone and AM630, indicating the participation of both the opioid and endocannabinoid system. Trans-caryophyllene treatment also decreased the IL-1β levels. These results demonstrate that trans-caryophyllene reduced both acute and chronic pain in mice, which may be mediated through the opioid and endocannabinoid systems. PMID:24055516

  15. Misdiagnosis of Abdominal Pain in Pregnancy: Acute Pancreatitis

    PubMed Central

    Samal, Sunita; Gupta, Shweta; Begum, Jasmina; Ghose, Seetesh

    2015-01-01

    We report a case of acute pancreatitis in a pregnant woman who presented to our emergency department with complaints of severe abdominal pain, was misdiagnosed as scar dehiscence and underwent emergency repeat caesarean section at 33 wks for fetal distress. The preterm baby developed severe respiratory distress and succumbed on the second postnatal day. Persistent severe pain in the postoperative period in the mother prompted further evaluation which led to a diagnosis of acute pancreatitis. Conservative and supportive management was instituted leading to an eventual favourable maternal outcome. PMID:25738042

  16. [Pain therapy in acute renal colic.].

    PubMed

    Tschuschke, C; Müller, S C; Hertle, L

    1993-09-01

    The severe pain of a renal colic is an emergency and requires a fast and sufficient analgesic therapy with few side-effects. The release of the ureteral obstruction is secondary to this initial treatment. Inhibition of prostaglandin synthesis directly interferes with the mechanism of renal colic pain. Dipyrone, indomethacin and diclofenac are the drugs of choice. They should be administered intravenously if possible. Narcotic agents and their derivatives are the second choice. Spasmolytic agents are unnecessary in the treatment of renal colic. PMID:18415401

  17. Acute augmentation of epoxygenated fatty acid levels rapidly reduces pain-related behavior in a rat model of type I diabetes.

    PubMed

    Inceoglu, Bora; Wagner, Karen M; Yang, Jun; Bettaieb, Ahmed; Schebb, Nils H; Hwang, Sung Hee; Morisseau, Christophe; Haj, Fawaz G; Hammock, Bruce D

    2012-07-10

    The nerve damage occurring as a consequence of glucose toxicity in diabetes leads to neuropathic pain, among other problems. This pain dramatically reduces the quality of life in afflicted patients. The progressive damage to the peripheral nervous system is irreversible although strict control of hyperglycemia may prevent further damage. Current treatments include tricyclic antidepressants, anticonvulsants, and opioids, depending on the severity of the pain state. However, available therapeutics have drawbacks, arguing for the need to better understand the pathophysiology of neuropathic pain and develop novel treatments. Here we demonstrate that stabilization of a class of bioactive lipids, epoxygenated fatty acids (EpFAs), greatly reduces allodynia in rats caused by streptozocin-induced type I diabetes. Inhibitors of the soluble epoxide hydrolase (sEHI) elevated and stabilized the levels of plasma and spinal EpFAs, respectively, and generated dose-dependent antiallodynic effects more potently and efficaciously than gabapentin. In acute experiments, positive modulation of EpFAs did not display differences in insulin sensitivity, glucose tolerance, or insulin secretion, indicating the efficacy of sEHIs are not related to the glycemic status. Quantitative metabolomic analysis of a panel of 26 bioactive lipids demonstrated that sEHI-mediated antiallodynic effects coincided with a selective elevation of the levels of EpFAs in the plasma, and a decrease in degradation products coincided with the dihydroxy fatty acids in the spinal cord. Overall, these results argue that further efforts in understanding the spectrum of effects of EpFAs will yield novel opportunities in treating neuropathic pain. PMID:22733772

  18. Evaluation of acute pelvic pain in women.

    PubMed

    Kruszka, Paul S; Kruszka, Stephen J

    2010-07-15

    Diagnosis of pelvic pain in women can be challenging because many symptoms and signs are insensitive and nonspecific. As the first priority, urgent life-threatening conditions (e.g., ectopic pregnancy, appendicitis, ruptured ovarian cyst) and fertility-threatening conditions (e.g., pelvic inflammatory disease, ovarian torsion) must be considered. A careful history focusing on pain characteristics, review of systems, and gynecologic, sexual, and social history, in addition to physical examination helps narrow the differential diagnosis. The most common urgent causes of pelvic pain are pelvic inflammatory disease, ruptured ovarian cyst, and appendicitis; however, many other diagnoses in the differential may mimic these conditions, and imaging is often needed. Transvaginal ultrasonography should be the initial imaging test because of its sensitivities across most etiologies and its lack of radiation exposure. A high index of suspicion should be maintained for pelvic inflammatory disease when other etiologies are ruled out, because the presentation is variable and the prevalence is high. Multiple studies have shown that 20 to 50 percent of women presenting with pelvic pain have pelvic inflammatory disease. Adolescents and pregnant and postpartum women require unique considerations. PMID:20642266

  19. Usefulness of the Pain Tracking Technique in Acute Mechanical Low Back Pain

    PubMed Central

    Bravo Acosta, Tania; Martín Cordero, Jorge E.; Hernández Tápanes, Solangel; Pedroso Morales, Isis; Fernández Cuesta, José Ignacio; Leyva Serrano, Maritza

    2015-01-01

    Objective. To evaluate the usefulness of the pain tracking technique in acute mechanical low back pain. Method. We performed an experimental prospective (longitudinal) explanatory study between January 2011 and September 2012. The sample was randomly divided into two groups. Patients were assessed at the start and end of the treatment using the visual analogue scale and the Waddell test. Treatment consisted in applying the pain tracking technique to the study group and interferential current therapy to the control group. At the end of treatment, cryotherapy was applied for 10 minutes. The Wilcoxon signed-rank test and the Mann Whitney test were used. They were performed with a predetermined significance level of p ≤ 0.05. Results. Pain was triggered by prolonged static posture and intense physical labor and intensified through trunk movements and when sitting and standing. The greatest relief was reported in lateral decubitus position and in William's position. The majority of the patients had contracture. Pain and disability were modified with the rehabilitation treatment in both groups. Conclusions. Both the pain tracking and interferential current techniques combined with cryotherapy are useful treatments for acute mechanical low back pain. The onset of analgesia is faster when using the pain tracking technique. PMID:26240758

  20. New formulations of fentanyl for acute pain management.

    PubMed

    Paech, M J; Bloor, M; Schug, S A

    2012-02-01

    Intravenous fentanyl citrate has stood the test of time as a valuable formulation for pain management. The desirable physicochemical properties of fentanyl have allowed the development of several alternative formulations for delivery using less invasive routes, for example, transmucosal (intranasal, oral buccal and oral sublingual) and transdermal. These new formulations have been applied to clinical settings in which rapid onset of analgesia is desired, using convenient but noninvasive methods. Recent commercialization of various formulations has been driven largely by the needs of cancer patients, for whom severe but self-limiting "breakthrough" pain is less suitably treated by parenteral or oral routes of opioid administration. However, these formulations are also used for acute analgesia in prehospital and in-hospital emergency department care, and for pediatric acute pain management. Finally, they are increasingly used by patients with chronic pain of nonmalignant origin, although there is considerable debate about their merit in this group. We searched the databases MEDLINE, PubMed, EMBASE, CINAHL and Cochrane up to October 2011, using search terms "fentanyl AND nasal; intranasal; transmucosal; buccal; sublingual; oral; inhaled; inhalation; transdermal". The characteristics of several formulations of fentanyl are reviewed, detailing their pharmacokinetics, pharmacodynamics and clinical experience with their use for acute pain management. PMID:22384452

  1. Common Questions About the Evaluation of Acute Pelvic Pain.

    PubMed

    Bhavsar, Amit K; Gelner, Elizabeth J; Shorma, Toni

    2016-01-01

    Acute pelvic pain is defined as lower abdominal or pelvic pain of less than three months' duration. It is a common presentation in primary care. Evaluation can be challenging because of a broad differential diagnosis and because many associated signs and symptoms are nonspecific. The most common diagnoses in reproductive-aged women with acute pelvic pain are idiopathic pelvic pain, pelvic inflammatory disease, acute appendicitis, ovarian cysts, ectopic pregnancy, and endometriosis. Among postmenopausal women, cancer must be considered. Findings from the history and physical examination can point to likely diagnoses, and laboratory testing and imaging can help confirm. Women of reproductive age should take a pregnancy test. In early pregnancy, transvaginal ultrasonography and beta human chorionic gonadotropin levels can help identify ectopic pregnancy and spontaneous abortion. For nonpregnant women, ultrasonography or computed tomography is indicated, depending on the possible diagnosis (e.g., ultrasonography is preferred when ovarian pathology is suspected). If ultrasonography results are nondiagnostic, magnetic resonance imaging can be helpful in pregnant women when acute appendicitis is suspected. If magnetic resonance imaging is unavailable, computed tomography may be indicated. PMID:26760839

  2. A Brain Signature to Differentiate Acute and Chronic Pain in Rats

    PubMed Central

    Guo, Yifei; Wang, Yuzheng; Sun, Yabin; Wang, Jin-Yan

    2016-01-01

    The transition from acute pain to chronic pain entails considerable changes of patients at multiple levels of the nervous system and in psychological states. An accurate differentiation between acute and chronic pain is essential in pain management as it may help optimize analgesic treatments according to the pain state of patients. Given that acute and chronic pain could modulate brain states in different ways and that brain states could greatly shape the neural processing of external inputs, we hypothesized that acute and chronic pain would show differential effects on cortical responses to non-nociceptive sensory information. Here by analyzing auditory-evoked potentials (AEPs) to pure tones in rats with acute or chronic pain, we found opposite influences of acute and chronic pain on cortical responses to auditory inputs. In particular, compared to no-pain controls, the N100 wave of rat AEPs was significantly enhanced in rats with acute pain but significantly reduced in rats with chronic pain, indicating that acute pain facilitated cortical processing of auditory information while chronic pain exerted an inhibitory effect. These findings could be justified by the fact that individuals suffering from acute or chronic pain would have different vigilance states, i.e., the vigilance level to external sensory stimuli would be increased with acute pain, but decreased with chronic pain. Therefore, this auditory response holds promise of being a brain signature to differentiate acute and chronic pain. Instead of investigating the pain system per se, the study of pain-induced influences on cortical processing of non-nocicpetive sensory information might represent a potential strategy to monitor the progress of pain chronification in clinical applications. PMID:27199727

  3. Actinomyces infection causing acute right iliac fossa pain

    PubMed Central

    Govindarajah, Narendranath; Hameed, Waseem; Middleton, Simon; Booth, Michael

    2014-01-01

    This is a case of a 75-year-old man being admitted to the on-call surgical department with acute abdominal pain. On arrival he was clinically dehydrated and shocked with localised pain over McBurney's point and examination findings were suggestive of appendiceal or other colonic pathology. Full blood testing revealed a white cell count of 38×109/L and a C reactive protein (CRP) of 278 mg/L. A CT scan revealed a gallbladder empyema that extended into the right iliac fossa. This case highlights the potential for a hyperdistended gallbladder empyema to present as acute right iliac fossa pain with blood tests suggestive of complicated disease. Further analysis confirmed Actinomyces infection as the underlying aetiology prior to a laparoscopic subtotal cholecystectomy. This case serves to remind clinicians of this as a rare potential cause of atypical gallbladder pathology. PMID:24872493

  4. TRPV1 sensitization mediates postinflammatory visceral pain following acute colitis.

    PubMed

    Lapointe, Tamia K; Basso, Lilian; Iftinca, Mircea C; Flynn, Robyn; Chapman, Kevin; Dietrich, Gilles; Vergnolle, Nathalie; Altier, Christophe

    2015-07-15

    Quiescent phases of inflammatory bowel disease (IBD) are often accompanied by chronic abdominal pain. Although the transient receptor potential vanilloid 1 (TRPV1) ion channel has been postulated as an important mediator of visceral hypersensitivity, its functional role in postinflammatory pain remains elusive. This study aimed at establishing the role of TRPV1 in the peripheral sensitization underlying chronic visceral pain in the context of colitis. Wild-type and TRPV1-deficient mice were separated into three groups (control, acute colitis, and recovery), and experimental colitis was induced by oral administration of dextran sulfate sodium (DSS). Recovery mice showed increased chemically and mechanically evoked visceral hypersensitivity 5 wk post-DSS discontinuation, at which point inflammation had completely resolved. Significant changes in nonevoked pain-related behaviors could also be observed in these animals, indicative of persistent discomfort. These behavioral changes correlated with elevated colonic levels of substance P (SP) and TRPV1 in recovery mice, thus leading to the hypothesis that SP could sensitize TRPV1 function. In vitro experiments revealed that prolonged exposure to SP could indeed sensitize capsaicin-evoked currents in both cultured neurons and TRPV1-transfected human embryonic kidney (HEK) cells, a mechanism that involved TRPV1 ubiquitination and subsequent accumulation at the plasma membrane. Importantly, although TRPV1-deficient animals experienced similar disease severity and pain as wild-type mice in the acute phase of colitis, TRPV1 deletion prevented the development of postinflammatory visceral hypersensitivity and pain-associated behaviors. Collectively, our results suggest that chronic exposure of colon-innervating primary afferents to SP could sensitize TRPV1 and thus participate in the establishment of persistent abdominal pain following acute inflammation. PMID:26021808

  5. Pregabalin for acute and chronic pain in adults

    PubMed Central

    Moore, R Andrew; Straube, Sebastian; Wiffen, Philip J; Derry, Sheena; McQuay, Henry J

    2014-01-01

    Background Antiepileptic drugs have been used in pain management since the 1960s. Pregabalin is a recently developed antiepileptic drug also used in management of chronic neuropathic pain conditions. Objectives To assess analgesic efficacy and associated adverse events of pregabalin in acute and chronic pain. Search methods We searched MEDLINE, EMBASE, and CENTRAL to May 2009 for randomised controlled trials (RCTs). Additional studies were identified from the reference lists of retrieved papers and on-line clinical trial databases. Selection criteria Randomised, double blind trials reporting on the analgesic effect of pregabalin, with subjective pain assessment by the patient as either the primary or a secondary outcome. Data collection and analysis Two independent review authors extracted data and assessed trial quality. Numbers-needed-to-treat-to-benefit (NNTs) were calculated, where possible, from dichotomous data for effectiveness, adverse events and study withdrawals. Main results There was no clear evidence of beneficial effects of pregabalin in established acute postoperative pain. No studies evaluated pregabalin in chronic nociceptive pain, like arthritis. Pregabalin at doses of 300 mg, 450 mg, and 600 mg daily was effective in patients with postherpetic neuralgia, painful diabetic neuropathy, central neuropathic pain, and fibromyalgia (19 studies, 7003 participants). Pregabalin at 150 mg daily was generally ineffective. Efficacy was demonstrated for dichotomous outcomes equating to moderate or substantial pain relief, alongside lower rates for lack of efficacy discontinuations with increasing dose. The best (lowest) NNT for each condition for at least 50% pain relief over baseline (substantial benefit) for 600 mg pregabalin daily compared with placebo were 3.9 (95% confidence interval 3.1 to 5.1) for postherpetic neuralgia, 5.0 (4.0 to 6.6) for painful diabetic neuropathy, 5.6 (3.5 to 14) for central neuropathic pain, and 11 (7.1 to 21) for fibromyalgia

  6. Acute Abdominal Pain Secondary to Chilaiditi Syndrome

    PubMed Central

    Pan, Andrew S.; Lopez, Michael A.; Buicko, Jessica L.; Lopez-Viego, Miguel

    2013-01-01

    Chilaiditi syndrome is a rare condition occurring in 0.025% to 0.28% of the population. In these patients, the colon is displaced and caught between the liver and the right hemidiaphragm. Patients' symptoms can range from asymptomatic to acute intermittent bowel obstruction. Diagnosis is best achieved with CT imaging. Identification of Chilaiditi syndrome is clinically significant as it can lead to many significant complications such as volvulus, perforation, and bowel obstruction. If the patient is symptomatic, treatment is usually conservative. Surgery is rarely indicated with indications including ischemia and failure of resolution with conservative management. PMID:23936720

  7. Acute low back pain: diagnostics and treatment.

    PubMed

    Becker, F C

    2001-03-01

    How many times have you heard from a patient or groaned yourself "Oh, my aching back?" Innocuous movements such as reaching, stooping, or leaning are halted mid-performance as you sense "something" give, catch, snap, grab, or slide in your lower back. Such subjective complaints may also include sensations of discomfort described as stabbing, sharp, dull, hot/burning, tingling, or numbing. In practice, you will be required to assess these subjective symptoms, effectively document objective data, formulate a diagnosis, and plan appropriate treatment for your patients. Careful attention to history, associated symptoms, and following a systematic approach to back pain can make the rule-in/out differentials less taxing on both the practitioner and the patient. PMID:11329554

  8. Topical rubefacients for acute and chronic pain in adults

    PubMed Central

    Matthews, Paul; Derry, Sheena; Moore, R Andrew; McQuay, Henry J

    2014-01-01

    Background Rubefacients (containing salicylates or nicotinamides) cause irritation of the skin, and are believed to relieve various musculoskeletal pains. They are available on prescription, and are common components in over-the-counter remedies. A non-Cochrane review in 2004 found limited evidence for efficacy. Objectives To review current evidence for efficacy and safety of topically applied rubefacients in acute and chronic painful musculoskeletal conditions in adults. Search methods Cochrane CENTRAL, MEDLINE, EMBASE, the Oxford Pain Relief Database, and reference lists of articles were searched; last search December 2008. Selection criteria Randomised, double blind, placebo or active controlled clinical trials of topical rubefacient for musculoskeletal pain in adults, with at least 10 participants per treatment arm, and reporting outcomes at close to 7 (minimum 3, maximum 10) days for acute conditions and 14 (minimum 7) days or longer for chronic conditions. Data collection and analysis Two review authors independently assessed trials for inclusion and quality, and extracted data. Relative benefit or risk and number needed to treat to benefit or harm (NNT or NNH) were calculated with 95% confidence intervals (CI). Acute and chronic conditions were analysed separately. Main results Six placebo and one active controlled studies (560 and 137 participants) in acute pain, and seven placebo and two active controlled studies (489 and 90 participants) in chronic pain were included. All used topical salicylates. The evidence in acute conditions was not robust; using only better quality, valid studies, there was no difference between topical rubefacient and topical control, though overall, including lower quality studies, the NNT for clinical success compared with placebo was 3.2 (95% CI: 2.4 to 4.9). In chronic conditions the NNT was 6.2 (95% CI: 4.0 to 13) compared with topical placebo. Adverse events and withdrawals occurred more often with rubefacients than placebo

  9. Roles of ASIC3, TRPV1, and NaV1.8 in the transition from acute to chronic pain in a mouse model of fibromyalgia

    PubMed Central

    2014-01-01

    Background Tissue acidosis is effective in causing chronic muscle pain. However, how muscle nociceptors contribute to the transition from acute to chronic pain is largely unknown. Results Here we showed that a single intramuscular acid injection induced a priming effect on muscle nociceptors of mice. The primed muscle nociceptors were plastic and permitted the development of long-lasting chronic hyperalgesia induced by a second acid insult. The plastic changes of muscle nociceptors were modality-specific and required the activation of acid-sensing ion channel 3 (ASIC3) or transient receptor potential cation channel V1 (TRPV1). Activation of ASIC3 was associated with increased activity of tetrodotoxin (TTX)-sensitive voltage-gated sodium channels but not protein kinase Cϵ (PKCϵ) in isolectin B4 (IB4)-negative muscle nociceptors. In contrast, increased activity of TTX-resistant voltage-gated sodium channels with ASIC3 or TRPV1 activation in NaV1.8-positive muscle nociceptors was required for the development of chronic hyperalgesia. Accordingly, compared to wild type mice, NaV1.8-null mice showed briefer acid-induced hyperalgesia (5 days vs. >27 days). Conclusion ASIC3 activation may manifest a new type of nociceptor priming in IB4-negative muscle nociceptors. The activation of ASIC3 and TRPV1 as well as enhanced NaV1.8 activity are essential for the development of long-lasting hyperalgesia in acid-induced, chronic, widespread muscle pain. PMID:24957987

  10. The analgesic efficacy of etoricoxib compared with oxycodone/acetaminophen in an acute postoperative pain model: a randomized, double-blind clinical trial.

    PubMed

    Chang, David J; Desjardins, Paul J; King, Thomas R; Erb, Tara; Geba, Gregory P

    2004-09-01

    Our objective in this study was to compare the analgesic effects of etoricoxib and oxycodone/acetaminophen in a postoperative dental pain model. Patients experiencing moderate to severe pain after extraction of two or more third molars were randomized to single doses of etoricoxib 120 mg (n = 100), oxycodone/acetaminophen 10/650 mg (n = 100), or placebo (n = 25). The primary end-point was total pain relief over 6 h. Other end-points included patient global assessment of response to therapy; onset, peak, and duration of effect; and rescue opioid analgesic use. Active treatments were statistically significantly superior to placebo for all efficacy measures. Total pain relief over 6 h for etoricoxib was significantly more than for oxycodone/acetaminophen (P < 0.001). Patient global assessment of response to therapy at 6 and 24 h was superior for etoricoxib. Both drugs achieved rapid onset, although the time was faster for oxycodone/acetaminophen by 5 min. The peak effect was similar for both drugs. Compared with oxycodone/acetaminophen patients, etoricoxib patients experienced a longer analgesic duration, had a smaller percentage requiring rescue opioids during 6 and 24 h, and required less rescue analgesia during 6 and 24 h. Oxycodone/acetaminophen treatment resulted in more frequent adverse events (AEs), drug-related AEs, nausea, and vomiting compared with etoricoxib treatment. In conclusion, etoricoxib 120 mg provided superior overall efficacy compared with oxycodone/acetaminophen 10/650 mg and was associated with significantly fewer AEs. PMID:15333415

  11. Pain management in the acute care setting: Update and debates.

    PubMed

    Palmer, Greta M

    2016-02-01

    Pain management in the paediatric acute care setting is underutilised and can be improved. An awareness of the analgesic options available and their limitations is an important starting point. This article describes the evolving understanding of relevant pharmacogenomics and safety data of the various analgesic agents with a focus on agents available in Australia and New Zealand. It highlights the concerns with the use of codeine in children and discusses alternative oral opioids. Key features of oral, parenteral, inhaled and intranasal analgesic agents are discussed, as well as evidence supported use of sweet tasting solutions and non-pharmacological interventions. One of the biggest changes in acute care pain management has been the advent of intranasal fentanyl providing reliable potent analgesia without the need for intravenous access. The article will also address the issue of multimodal analgesia where a single agent is insufficient. PMID:27062626

  12. Development and validation of a screening tool to predict the risk of chronic low back pain in patients presenting with acute low back pain: a study protocol

    PubMed Central

    Traeger, Adrian; Henschke, Nicholas; Hübscher, Markus; Williams, Christopher M; Kamper, Steven J; Maher, Chris G; Moseley, G Lorimer; McAuley, James H

    2015-01-01

    Introduction Around 40% of people presenting to primary care with an episode of acute low back pain develop chronic low back pain. In order to reduce the risk of developing chronic low back pain, effective secondary prevention strategies are needed. Early identification of at-risk patients allows clinicians to make informed decisions based on prognostic profile, and researchers to select appropriate participants for secondary prevention trials. The aim of this study is to develop and validate a prognostic screening tool that identifies patients with acute low back pain in primary care who are at risk of developing chronic low back pain. This paper describes the methods and analysis plan for the development and validation of the tool. Methods/analysis The prognostic screening tool will be developed using methods recommended by the Prognosis Research Strategy (PROGRESS) Group and reported using the Transparent Reporting of a multivariable prediction model for Individual Prognosis Or Diagnosis (TRIPOD) statement. In the development stage, we will use data from 1248 patients recruited for a prospective cohort study of acute low back pain in primary care. We will construct 3 logistic regression models to predict chronic low back pain according to 3 definitions: any pain, high pain and disability at 3 months. In the validation stage, we will use data from a separate sample of 1643 patients with acute low back pain to assess the performance of each prognostic model. We will produce validation plots showing Nagelkerke R2 and Brier score (overall performance), area under the curve statistic (discrimination) and the calibration slope and intercept (calibration). Ethics and dissemination Ethical approval from the University of Sydney Ethics Committee was obtained for both of the original studies that we plan to analyse using the methods outlined in this protocol (Henschke et al, ref 11-2002/3/3144; Williams et al, ref 11638). PMID:26179647

  13. Carbamazepine for acute and chronic pain in adults

    PubMed Central

    Wiffen, Philip J; Derry, Sheena; Moore, R Andrew; McQuay, Henry J

    2014-01-01

    Background Carbamazepine is used to treat chronic neuropathic pain. Objectives Evaluation of analgesic efficacy and adverse effects of carbamazepine for acute and chronic pain management (except headaches). Search methods Randomised controlled trials (RCTs) of carbamazepine in acute, chronic or cancer pain were identified, searching MEDLINE, EMBASE, SIGLE and Cochrane CENTRAL to June 2010, reference lists of retrieved papers, and reviews. Selection criteria RCTs reporting the analgesic effects of carbamazepine. Data collection and analysis Two authors independently extracted results and scored for quality. Numbers needed to treat to benefit (NNT) or harm (NNH) with 95% confidence intervals (CI) were calculated from dichotomous data for effectiveness, adverse effects and adverse event withdrawal. Issues of study quality, size, duration, and outcomes were examined. Main results Fifteen included studies (12 cross-over design; three parallel-group) with 629 participants. Carbamazepine was less effective than prednisolone in preventing postherpetic neuralgia following acute herpes zoster (1 study, 40 participants). No studies examined acute postoperative pain. Fourteen studies investigated chronic neuropathic pain: two lasted eight weeks, others were four weeks or less (mean 3 weeks, median 2 weeks). Five had low reporting quality. Ten involved fewer than 50 participants; mean and median maximum treatment group sizes were 34 and 29. Outcome reporting was inconsistent. Most placebo controlled studies indicated that carbamazepine was better than placebo. Five studies with 298 participants provided dichotomous results; 70% improved with carbamazepine and 12% with placebo. Carbamazepine at any dose, using any definition of improvement was significantly better than placebo (70% versus 12% improved; 5 studies, 298 participants); relative benefit 6.1 (3.9 to 9.7), NNT 1.7 (1.5 to 2.0). Four studies (188 participants) reporting outcomes equivalent to 50% pain reduction or more

  14. Topical NSAIDs for acute pain: a meta-analysis

    PubMed Central

    Mason, Lorna; Moore, R Andrew; Edwards, Jayne E; Derry, Sheena; McQuay, Henry J

    2004-01-01

    Background A previous systematic review reported that topical NSAIDs were effective in relieving pain in acute conditions like sprains and strains, with differences between individual drugs for efficacy. More trials, a better understanding of trial quality and bias, and a reclassification of certain drugs necessitate a new review. Methods Studies were identified by searching electronic databases and writing to manufacturers. We selected randomised double blind trials comparing topical NSAID with either placebo or another active treatment in adults with acute pain, and extracted dichotomous information approximating to a 50% reduction in pain at one week, together with details of adverse events and withdrawals. Relative benefit and number-needed-to-treat (NNT), and relative risk and number-needed-to-harm (NNH) were calculated, with sensitivity analyses where appropriate to investigate differences between individual drugs and aspects of trial design. Results Twenty-six double blind placebo controlled trials had information from 2,853 patients for evaluation of efficacy. Topical NSAID was significantly better than placebo in 19 of the 26 trials, with a pooled relative benefit of 1.6 (95% confidence interval 1.4 to 1.7), and NNT of 3.8 (95% confidence interval 3.4 to 4.4) compared with placebo for the outcome of half pain relief at seven days. Results were not affected by outcome reported, or condition treated, but smaller trials yielded a larger estimate of efficacy. Indirect comparisons of individual topical NSAIDs showed that ketoprofen was significantly better than all other topical NSAIDs, while indomethacin was barely distinguished from placebo. Three trials, with 433 patients, compared topical with oral NSAID (two trials compared the same drug, one compared different drugs) and found no difference in efficacy. Local adverse events, systemic adverse events, or withdrawals due to an adverse event were rare, and no different between topical NSAID and placebo

  15. Acute Abdominal Pain in the Bariatric Surgery Patient.

    PubMed

    Lewis, Kyle D; Takenaka, Katrin Y; Luber, Samuel D

    2016-05-01

    Obesity is present in epidemic proportions in the United States, and bariatric surgery has become more common. Thus, emergency physicians will undoubtedly encounter many patients who have undergone one of these procedures. Knowledge of the anatomic changes specific to these procedures aids the clinician in understanding potential complications and devising an organized differential diagnosis. This article reviews common bariatric surgery procedures, their complications, and the approach to acute abdominal pain in these patients. PMID:27133251

  16. Use of Scrambler Therapy in Acute Paediatric Pain: A Case Report and Review of the Literature

    PubMed Central

    Spadini, Silvia; De Tommasi, Valentina; Benini, Franca

    2016-01-01

    We report our clinical experience on the effect of Scrambler Therapy (ST) for a child with acute mixed pain refractory to pharmacological treatment. ST, recently proposed as an alternative treatment for chronic neuropathic pain in adults, is a noninvasive approach to relieve pain, by changing pain perception at brain level. It is safe and has no side effects. Further research is needed to assess its efficacy for acute pain and for paediatric population. PMID:26977329

  17. Cardiac computed tomography in patients with acute chest pain.

    PubMed

    Nieman, Koen; Hoffmann, Udo

    2015-04-14

    The efficient and reliable evaluation of patients with acute chest pain is one of the most challenging tasks in the emergency department. Coronary computed tomography (CT) angiography may play a major role, since it permits ruling out coronary artery disease with high accuracy if performed with expertise in properly selected and prepared patients. Several randomized trials have established early cardiac CT as a viable safe and potentially more efficient alternative to functional testing in the evaluation of acute chest pain. Ongoing investigations explore whether advanced anatomic and functional assessments such as high-risk coronary plaque, resting myocardial perfusion, and left ventricular function, or the simulation of the fractional coronary flow reserve will add information to the anatomic assessment for stenosis, which would allow expanding the benefits of cardiac CT from triage to treatment decisions. Especially, the combination of high-sensitive troponins and coronary computed tomography angiography may play a valuable role in future strategies for the management of patients presenting with acute chest pain. PMID:25687351

  18. Diagnosis of acute abdominal pain in older patients.

    PubMed

    Lyon, Corey; Clark, Dwayne C

    2006-11-01

    Acute abdominal pain is a common presenting complaint in older patients. Presentation may differ from that of the younger patient and is often complicated by coexistent disease, delays in presentation, and physical and social barriers. The physical examination can be misleadingly benign, even with catastrophic conditions such as abdominal aortic aneurysm rupture and mesenteric ischemia. Changes that occur in the biliary system because of aging make older patients vulnerable to acute cholecystitis, the most common indication for surgery in this population. In older patients with appendicitis, the initial diagnosis is correct only one half of the time, and there are increased rates of perforation and mortality when compared with younger patients. Medication use, gallstones, and alcohol use increase the risk of pancreatitis, and advanced age is an indicator of poor prognosis for this disease. Diverticulitis is a common cause of abdominal pain in the older patient; in appropriately selected patients, it may be treated on an outpatient basis with oral antibiotics. Small and large bowel obstructions, usually caused by adhesive disease or malignancy, are more common in the aged and often require surgery. Morbidity and mortality among older patients presenting with acute abdominal pain are high, and these patients often require hospitalization with prompt surgical consultation. PMID:17111893

  19. [Nurse's experience of using music therapy to relieve acute pain in a post-orthopedic surgery patient].

    PubMed

    Hsiao, Tsai-Yun; Hsieh, Hsiu-Fang

    2009-08-01

    This article describes the experience of a nurse who used music therapy as the intervention to reduce a patient's pain during wound care after orthopedic surgery. The intervention was applied between April 8th and April 29th 2008. The nurse applied Roy's adaptation model as the assessment tool. The major and primary health problem identified was acute pain accelerated by wound care. The pain of this client not only triggered negative feelings, but also affected negatively on his daily life and feelings of self-belongingness. Through an individual-tailored music therapy, the client's pain during wound care was greatly reduced and even completely disappeared. The ultimate outcome of decrease in pain included reductions in negative feelings and increased positive spiritual strength. It is recommended that nurses who are responsible for wound care use this simple and economical music intervention to reduce acute postoperative pain. PMID:19634107

  20. The Acute to Chronic Pain Transition: Can Chronic Pain Be Prevented?

    PubMed

    Pozek, John-Paul J; Beausang, David; Baratta, Jaime L; Viscusi, Eugene R

    2016-01-01

    Chronic postsurgical pain (CPSP) is a distressing disease process that can lead to long-term disability, reduced quality of life, and increased health care spending. Although the exact mechanism of development of CPSP is unknown, nerve injury and inflammation may lead to peripheral and central sensitization. Given the complexity of the disease process, no novel treatment has been identified. The preoperative use of multimodal analgesia has been shown to decrease acute postoperative pain, but it has no proven efficacy in preventing development of CPSP. PMID:26614716

  1. Does adherence to treatment mediate the relationship between patients' treatment outcome expectancies and the outcomes of pain intensity and recovery from acute low back pain?

    PubMed

    Haanstra, Tsjitske M; Kamper, Steven J; Williams, Christopher M; Spriensma, Alette S; Lin, Chung-Wei Christine; Maher, Christopher G; de Vet, Henrica C W; Ostelo, Raymond W J G

    2015-08-01

    It is believed that patients' expectancies about the effectiveness of treatment influence their treatment outcomes, but the working mechanism is rarely studied in patients with low back pain. Theoretical models suggest that adherence to treatment may be an important pathway. The aim of this study was to assess the mediating role of adherence to treatment in the relationship between expectancies and the outcomes of recovery and pain intensity in patients with acute low back pain. This study used data from a randomized placebo-controlled trial of paracetamol for acute low back pain. Expectancies were measured with the Credibility Expectancy Questionnaire. Adherence was measured with a medication diary. Pain intensity was recorded daily in a diary on a 0 to 10 pain scale, and recovery was defined as the first of 7 consecutive days scoring 0 or 1 on a 6-point pain scale. Cox regression (dependent variable: recovery) and linear mixed-model analyses (dependent variable: daily pain intensity scores) were performed. The "difference in coefficients" approach was used to establish mediation. A total of 1573 participants were included in current analyses. There was a small but highly significant relationship between expectancies and outcomes; 3.3% of the relationship between expectancies and recovery and 14.2% of the relationship between expectancies and pain intensity were mediated by adherence to treatment. This study does not convincingly support the theory that adherence is a key pathway in the relationship between treatment outcome expectancies and recovery and pain intensity in this acute low back pain population. PMID:25906348

  2. Computerized tomography of the acute left upper quadrant pain.

    PubMed

    Tirkes, Temel; Ballenger, Zachary; Steenburg, Scott D; Altman, Daniel J; Sandrasegaran, Kumaresan

    2016-08-01

    The purpose of this study was to evaluate the clinical utility of computerized tomography (CT) of the abdomen in the emergent setting of left upper quadrant pain. One hundred patients (average age: 45, range: 19-93 years, female: 57 %, male: 43 %) who presented to the emergency department (ED) and underwent CT scanning of abdomen with the given indication of left upper quadrant pain were included in this study. The results from CT examinations were compared to final diagnoses determined by either ED physician or clinician on a follow-up visit. Sensitivity of CT was 69 % (95 %CI: 52-83 %) for 39 patients who eventually were diagnosed with an acute abdominal abnormality. Twenty-seven patients had an acute abnormal finding on abdominal CT that represented the cause of the patient's pain (positive predictive value of 100 %, 95 %CI: 87-100 %). Of the remaining 73 patients with negative CT report, 12 were diagnosed clinically (either in the ED or on follow-up visit to specialist) with a pathology that was undetectable on the CT imaging (negative predictive value of 83 %, 95 %CI: 73-91 %). None of the remaining 61 patients with negative CT were found to have pathology by clinical evaluation (specificity of 100 %, 95 %CI: 94-100 %). CT is a useful examination for patients with acute left upper quadrant pain in the emergency department setting with moderate sensitivity and excellent specificity. PMID:27230731

  3. Endogenous pain inhibition is unrelated to autonomic responses in acute whiplash-associated disorders.

    PubMed

    De Kooning, Margot; Daenen, Liesbeth; Roussel, Nathalie; Cras, Patrick; Buyl, Ronald; Ickmans, Kelly; Struyf, Filip; Nijs, Jo

    2015-01-01

    Patients with acute whiplash-associated disorder (WAD) demonstrate an inefficient endogenous pain inhibition and may experience a dysfunction in autonomic nervous system reactivity to pain. This study compared the autonomic response to painful stimuli between patients with acute and chronic WAD and healthy controls. In addition, the role of the autonomic nervous system for explaining inefficient endogenous pain inhibition was examined in acute WAD. Seventeen patients with acute WAD, 30 patients with chronic WAD, and 31 healthy controls participated in an experiment evaluating the autonomic nervous system at rest and during painful stimuli. Skin conductance and heart rate variability (HRV) parameters were monitored continuously during conditioned pain modulation. A significant autonomic response to pain was present for skin conductance and two HRV parameters in all experimental groups. There was an interaction effect in the skin conductance response to pain but not in HRV responses in any of the groups. In patients with acute WAD, no significant correlations were present between pain, pressure pain thresholds, pain inhibition, and any of the autonomic parameters. This study refutes autonomic dysfunction at rest and in response to pain in acute WAD. The dysfunctional conditioned pain modulation appears unrelated to autonomic responses to pain. PMID:26348457

  4. Single dose oral diclofenac for acute postoperative pain in adults

    PubMed Central

    Derry, Philip; Derry, Sheena; Moore, R Andrew; McQuay, Henry J

    2014-01-01

    Background Diclofenac is a non-steroidal anti-inflammatory drug (NSAID), available as a potassium salt (immediate-release) or sodium salt (delayed-release). This review updates an earlier review published in The Cochrane Database of Systematic Reviews (Issue 2, 2004) on ‘Single dose oral diclofenac for postoperative pain’. Objectives To assess single dose oral diclofenac for the treatment of acute postoperative pain. Search methods Cochrane CENTRAL, MEDLINE, EMBASE, Biological Abstracts, the Oxford Pain Relief Database, and reference lists of articles were searched; last search December 2008. Selection criteria Randomised, double-blind, placebo-controlled clinical trials of single dose, oral diclofenac (sodium or potassium) for acute postoperative pain in adults. Data collection and analysis Two review authors independently assessed studies for inclusion and quality, and extracted data. The area under the pain relief versus time curve was used to derive the proportion of participants with at least 50% pain relief over 4 to 6 hours, using validated equations. Relative benefit (risk) and number needed to treat to benefit (NNT) were calculated. Information on adverse events, time to remedication, and participants needing additional analgesia was also collected. Main results Fifteen studies (eight additional studies) with 1512 participants more than doubled the information available at each dose. Overall 50% to 60% of participants experienced at least 50% pain relief over 4 to 6 hours at any dose with diclofenac, compared to 10 to 20% with placebo, giving NNTs of about 2.5 for doses of 25 mg to 100 mg (similar to earlier review); no dose response was demonstrated. At 50 mg and 100 mg, NNTs for diclofenac potassium (2.1 (1.8 to 2.4) and 1.9 (1.7 to 2.2)) were significantly lower (better) than for diclofenac sodium (6.7 (4.2 to 17) and 4.5 (3.2 to 7.7)). The median time to use of rescue medication was 2 hours for placebo, 4.3 hours for diclofenac 50 mg and 4.9 hours

  5. Acute radiation risk models

    NASA Astrophysics Data System (ADS)

    Smirnova, Olga

    Biologically motivated mathematical models, which describe the dynamics of the major hematopoietic lineages (the thrombocytopoietic, lymphocytopoietic, granulocytopoietic, and erythropoietic systems) in acutely/chronically irradiated humans are developed. These models are implemented as systems of nonlinear differential equations, which variables and constant parameters have clear biological meaning. It is shown that the developed models are capable of reproducing clinical data on the dynamics of these systems in humans exposed to acute radiation in the result of incidents and accidents, as well as in humans exposed to low-level chronic radiation. Moreover, the averaged value of the "lethal" dose rates of chronic irradiation evaluated within models of these four major hematopoietic lineages coincides with the real minimal dose rate of lethal chronic irradiation. The demonstrated ability of the models of the human thrombocytopoietic, lymphocytopoietic, granulocytopoietic, and erythropoietic systems to predict the dynamical response of these systems to acute/chronic irradiation in wide ranges of doses and dose rates implies that these mathematical models form an universal tool for the investigation and prediction of the dynamics of the major human hematopoietic lineages for a vast pattern of irradiation scenarios. In particular, these models could be applied for the radiation risk assessment for health of astronauts exposed to space radiation during long-term space missions, such as voyages to Mars or Lunar colonies, as well as for health of people exposed to acute/chronic irradiation due to environmental radiological events.

  6. Approach to chest pain and acute myocardial infarction.

    PubMed

    Pandie, S; Hellenberg, D; Hellig, F; Ntsekhe, M

    2016-03-01

    Patient history, physical examination, 12-lead electrocardiogram (ECG) and cardiac biomarkers are key components of an effective chest pain assessment. The first priority is excluding serious chest pain syndromes, namely acute coronary syndromes (ACSs), aortic dissection, pulmonary embolism, cardiac tamponade and tension pneumothorax. On history, the mnemonic SOCRATES (Site Onset Character Radiation Association Time Exacerbating/relieving factor and Severity) helps differentiate cardiac from non-cardiac pain. On examination, evaluation of vital signs, evidence of murmurs, rubs, heart failure, tension pneumothoraces and chest infections are important. A 12-lead ECG should be interpreted within 10 minutes of first medical contact, specifically to identify ST elevation myocardial infarction (STEMI). High-sensitivity troponins improve the rapid rule-out of myocardial infarction (MI) and confirmation of non-ST elevation MI (NSTEMI). ACS (STEMI and NSTEMI/unstable anginapectoris (UAP)) result from acute destabilisation of coronary atheroma with resultant complete (STEMI) or subtotal (NSTEMI/UAP) thrombotic coronary occlusion. The management of STEMI patients includes providing urgent reperfusion: primary percutaneous coronary intervention(PPCI) if available, deliverable within 60 - 120 minutes, and fibrinolysis if PPCI is not available. Essential adjunctive therapies include antiplatelet therapy (aspirin, P2Y12 inhibitors), anticoagulation (heparin or low-molecular-weight heparin) and cardiac monitoring. PMID:27303759

  7. Acute abdominal and pelvic pain in pregnancy: ESUR recommendations.

    PubMed

    Masselli, Gabriele; Derchi, Lorenzo; McHugo, Josephine; Rockall, Andrea; Vock, Peter; Weston, Michael; Spencer, John

    2013-12-01

    Acute abdominal pain in pregnancy presents diagnostic and therapeutic challenges. Standard imaging techniques need to be adapted to reduce harm to the fetus from X-rays due to their teratogenic and carcinogenic potential. Ultrasound remains the primary imaging investigation of the pregnant abdomen. Magnetic resonance imaging (MRI) has been shown to be useful in the diagnosis of gynaecological and obstetric problems during pregnancy and in the setting of acute abdomen during pregnancy. MRI overcomes some of the limitations of ultrasound, mainly the size of the gravid uterus. MRI poses theoretical risks to the fetus and care must be taken to minimise these with the avoidance of contrast agents. This article reviews the evolving imaging and clinical literature on appropriate investigation of acute abdominal and pelvic pain during established intrauterine pregnancy, addressing its common causes. Guidelines based on the current literature and on the accumulated clinico-radiological experience of the European Society of Urogenital Radiology (ESUR) working group are proposed for imaging these suspected conditions. PMID:23990045

  8. Heart rate analysis by sparse representation for acute pain detection.

    PubMed

    Tejman-Yarden, Shai; Levi, Ofer; Beizerov, Alex; Parmet, Yisrael; Nguyen, Tu; Saunders, Michael; Rudich, Zvia; Perry, James C; Baker, Dewleen G; Moeller-Bertram, Tobias

    2016-04-01

    Objective pain assessment methods pose an advantage over the currently used subjective pain rating tools. Advanced signal processing methodologies, including the wavelet transform (WT) and the orthogonal matching pursuit algorithm (OMP), were developed in the past two decades. The aim of this study was to apply and compare these time-specific methods to heart rate samples of healthy subjects for acute pain detection. Fifteen adult volunteers participated in a study conducted in the pain clinic at a single center. Each subject's heart rate was sampled for 5-min baseline, followed by a cold pressor test (CPT). Analysis was done by the WT and the OMP algorithm with a Fourier/Wavelet dictionary separately. Data from 11 subjects were analyzed. Compared to baseline, The WT analysis showed a significant coefficients' density increase during the pain incline period (p < 0.01) and the entire CPT (p < 0.01), with significantly higher coefficient amplitudes. The OMP analysis showed a significant wavelet coefficients' density increase during pain incline and decline periods (p < 0.01, p < 0.05) and the entire CPT (p < 0.001), with suggestive higher amplitudes. Comparison of both methods showed that during the baseline there was a significant reduction in wavelet coefficient density using the OMP algorithm (p < 0.001). Analysis by the two-way ANOVA with repeated measures showed a significant proportional increase in wavelet coefficients during the incline period and the entire CPT using the OMP algorithm (p < 0.01). Both methods provided accurate and non-delayed detection of pain events. Statistical analysis proved the OMP to be by far more specific allowing the Fourier coefficients to represent the signal's basic harmonics and the wavelet coefficients to focus on the time-specific painful event. This is an initial study using OMP for pain detection; further studies need to prove the efficiency of this system in different settings. PMID:26264057

  9. Microglia and monocytes synergistically promote the transition from acute to chronic pain after nerve injury

    PubMed Central

    Peng, Jiyun; Gu, Nan; Zhou, Lijun; B Eyo, Ukpong; Murugan, Madhuvika; Gan, Wen-Biao; Wu, Long-Jun

    2016-01-01

    Microglia and peripheral monocytes contribute to hypersensitivity in rodent models of neuropathic pain. However, the precise respective function of microglia and peripheral monocytes has not been investigated in these models. To address this question, here we combined transgenic mice and pharmacological tools to specifically and temporally control the depletion of microglia and monocytes in a mouse model of spinal nerve transection (SNT). We found that although microglia and monocytes are required during the initiation of mechanical allodynia or thermal hyperalgesia, these cells may not be as important for the maintenance of hypersensitivity. Moreover, we demonstrated that either resident microglia or peripheral monocytes are sufficient in gating neuropathic pain after SNT. We propose that resident microglia and peripheral monocytes act synergistically to initiate hypersensitivity and promote the transition from acute to chronic pain after peripheral nerve injury. PMID:27349690

  10. Varicella Zoster Infection: A Rare Cause of Abdominal Pain Mimicking Acute Abdomen

    PubMed Central

    Olmez, Deniz; Boz, Alper; Erkan, Nazif

    2009-01-01

    Varicella zoster is an acute viral infection that results from reactivation of a latent varicella zoster virus. It usually occurs in adult population and immune compromised patients. It rarely occurs in healthy children. Here we present a 14 years old male with varicella zoster that had abdominal pain mimicking acute abdomen to alert others who are consulted for the differentiation of acute abdomen and others who may be consulted for pain management. Keywords Varicella zoster; Abdominal pain PMID:22461879

  11. An 86-year-old man with acute abdominal pain.

    PubMed

    van Dam, Paul M E L; Posthouwer, Dirk

    2016-01-01

    An 86-year-old man presented with severe pain in the upper abdomen along with fever. On physical examination, we found an arterial blood pressure of 84/43 mm Hg, a heart rate of 80 bpm and a temperature of 38.3°C. The abdomen was painful and peristalsis was absent. Empiric antibiotic therapy for sepsis was started with amoxicillin/clavulanate and gentamicin. CT scan of the abdomen revealed an emphysematous cholecystitis. Percutaneous ultrasound-guided cholecystostomy was applied. Bile cultures revealed Clostridium perfringens. Emphysematous cholecystitis is a life-threatening form of acute cholecystitis that occurs as a consequence of ischaemic injury to the gallbladder, followed by translocation of gas-forming bacteria (ie, C. perfringens, Escherichia coli, Klebsiella and Streptococci). The mortality associated with emphysematous cholecystitis is higher than in non-emphysematous cholecystitis (15% vs 4%). Therefore, early diagnosis with radiological imaging is of vital importance. PMID:26869625

  12. Hypnosis for Acute Procedural Pain: A Critical Review.

    PubMed

    Kendrick, Cassie; Sliwinski, Jim; Yu, Yimin; Johnson, Aimee; Fisher, William; Kekecs, Zoltán; Elkins, Gary

    2016-01-01

    Clinical evidence for the effectiveness of hypnosis in the treatment of acute procedural pain was critically evaluated based on reports from randomized controlled clinical trials (RCTs). Results from the 29 RCTs meeting inclusion criteria suggest that hypnosis decreases pain compared to standard care and attention control groups and that it is at least as effective as comparable adjunct psychological or behavioral therapies. In addition, applying hypnosis in multiple sessions prior to the day of the procedure produced the highest percentage of significant results. Hypnosis was most effective in minor surgical procedures. However, interpretations are limited by considerable risk of bias. Further studies using minimally effective control conditions and systematic control of intervention dose and timing are required to strengthen conclusions. PMID:26599994

  13. A surprising cause of acute right upper quadrant pain

    PubMed Central

    Stitt, Rodger Scott; Greenwood, Robert; Laczek, Jeffrey

    2014-01-01

    A 42 year-old African-American woman was admitted for severe acute right upper quadrant pain. Her liver function tests showed a cholestatic pattern of hepatitis. She had no known history of liver disease or sarcoidosis. Imaging of her liver and biliary tree did not reveal any apparent cause for her right upper quadrant pain. A liver biopsy was performed which showed granulomatous disease. This prompted a CT chest that showed mediastinal lymphadenopathy. Biopsy of the mediastinal lymphnode revealed non-caseating granulomas. Despite having no pulmonary symptoms or history of pulmonary sarcoidosis, she was diagnosed with systemic pulmonary sarcoidosis. She was treated with corticosteroids and had complete resolution of symptoms over the next several weeks. PMID:25103316

  14. Diagnostic peritoneal lavage in evaluating acute abdominal pain.

    PubMed

    Barbee, C L; Gilsdorf, R B

    1975-06-01

    A study was performed to determine the value of peritoneal lavage in the acute abdomen not related to trauma. Lavage was performed in 33 patients in the evaluation of abdominal pain of sufficient degree to warrant consideration for surgical intervention. Peritoneal lavage was truly positive or truly negative in 64% of the cases. It showed false negative results in 28% and false positive results in 8%. The lavage was most accurate in the evaluation of appendicitis, colonic disease, and intra abdominal bleeding. It was highly inaccurate in the evaluation of cholecystitis and peptic ulcer disease. It was concluded that the peritoneal lavage can be a useful adjunct in the evaluation of patients with abdominal pain and should be considered in difficult diagnostic problems but not routinely employed. PMID:1138636

  15. Pain assessment in animal models of osteoarthritis.

    PubMed

    Piel, Margaret J; Kroin, Jeffrey S; van Wijnen, Andre J; Kc, Ranjan; Im, Hee-Jeong

    2014-03-10

    Assessment of pain in animal models of osteoarthritis is integral to interpretation of a model's utility in representing the clinical condition, and enabling accurate translational medicine. Here we describe behavioral pain assessments available for small and large experimental osteoarthritic pain animal models. PMID:24333346

  16. An Audit of Changes in Outcomes of Acute Pain Service

    PubMed Central

    Low, Sheng Jia; Wong, Stanley Sau Ching; Qiu, Qiu; Lee, Yvonne; Chan, Timmy Chi Wing; Irwin, Michael G.; Cheung, Chi Wai

    2015-01-01

    Abstract Acute pain services (APS) have evolved over time. Strategies nowadays emphasize multimodal analgesic regimes using a combination of nonopioid adjuvant analgesic drugs, peripheral nerve blocks, and local anaesthetic wound infiltration where appropriate. APS should be assessed over time to evaluate changes in outcomes which form the basis for future development. In this audit, data of patients under APS care in Queen Mary hospital, Hong Kong, between 2009 and 2012 were analyzed and compared with data from a previous audit between 1992 and 1995. The use of patient-controlled analgesia (PCA) was increased (from 69.3% to 86.5%, P < 0.001), while the use of epidural analgesia reduced (from 25.3% to 8.3%, P < 0.001) significantly. Although postoperative pain scores did not improve, PCA opioid consumption and the incidence of analgesia-related side effects were significantly less (all P < 0.001). More patients graded their postoperative analgesic techniques used as good when the results from these 2 audit periods were compared (P < 0.001 and P = 0.001 for PCA and epidural analgesia, respectively). In conclusion, there has been a change in analgesic management techniques, but there has been no improvement in overall pain relief. While changes over time have led to improvement in important parameters such as the incidence of side effects and patient satisfaction, further and continuous efforts and improvements are warrant to reduce acute pain relief and suffering of the patients after the surgery. PMID:26448012

  17. Efficacy of hepatobiliary imaging in acute abdominal pain: concise communication

    SciTech Connect

    Freitas, J.E.; Fink-Bennett, D.M.; Thrall, J.H.; Resinger, W.W.; Calderon, H.C.; Mirkes, S.H.; Shah, P.K.

    1980-10-01

    To assess prospectively the usefulness of hepatobiliary imaging in acute abdominal pain (72 hr or less), 36 patients were scintigraphed. Before the procedure, the referring physician completed Part I of a questionnaire indicating his differential diagnosis, diagnostic confidence (expressed as a percentage), and therapeutic plan. Immediately after the test, the same physician with knowledge of the results, completed Part II of the questionnaire indicating again his differential diagnosis, diagnostic confidence, and therapeutic plan. The impact of the imaging on the physician's diagnostic confidence was expressed as a log-likelihood-ratio (LLR).

  18. Acute Painful Ptosis Secondary to IgG4 Dacryoadenitis.

    PubMed

    Hussain, Rumana; El-Khyat, Abdul; Berry-Brincat, Antonella

    2016-01-01

    A 48-year-old lorry driver presented with 3 weeks of blurred vision, pain and diplopia. There was a right upper lid ptosis with some restriction of eye movements. A CT revealed an enlarged lacrimal gland and lacrimal gland biopsy showed IgG4-positive plasma cells. The patient responded to oral prednisolone and fully recovered. As a condition which mimics a number of diseases, an IgG4-related disease presents a diagnostic challenge and ought to be considered in both acute and chronic presentations. PMID:27293410

  19. [Caffeine as adjuvant analgeticum for treating acute pain].

    PubMed

    Nikolajsen, Lone; Haroutiunian, Simon

    2013-10-14

    Based on 19 studies (7,238 participants) a Cochrane review concludes that the addition of caffeine to an analgesic drug provides superior analgesia compared with the analgesic drug alone. The benefit is small, with a number needed to treat of approx. 16. The use of analgesics containing caffeine is associated with an increased risk of the development of physical dependence, overuse headache, and withdrawal symptoms upon abrupt discontinuation. Combination analgesics with caffeine should only be used temporarily and exclusively for the treatment of acute pain conditions. PMID:24629115

  20. Pain perception in neurodevelopmental animal models of schizophrenia.

    PubMed

    Franěk, M; Vaculín, S; Yamamotová, A; Stastný, F; Bubeníková-Valešová, V; Rokyta, R

    2010-01-01

    Animal models are important for the investigation of mechanisms and therapeutic approaches in various human diseases, including schizophrenia. Recently, two neurodevelopmental rat models of this psychosis were developed based upon the use of subunit selective N-methyl-D-aspartate receptor agonists--quinolinic acid (QUIN) and N-acetyl-aspartyl-glutamate (NAAG). The aim of this study was to evaluate pain perception in these models. QUIN or NAAG was infused into lateral cerebral ventricles neonatally. In the adulthood, the pain perception was examined. The rats with neonatal brain lesions did not show any significant differences in acute mechanical nociception and in formalin test compared to controls. However, the neonatally lesioned rats exhibited significantly higher pain thresholds in thermal nociception. Increased levels of mechanical hyperalgesia, accompanying the sciatic nerve constriction (neuropathic pain), were also observed in lesioned rats. Although hyperalgesia was more pronounced in QUIN-treated animals, the number of c-Fos-immunoreactive neurons of the lumbar spinal cord was similar in experimental and control rats. We conclude that neonatal brain lesions attenuated the thermal perception in both nociceptive and neuropathic pain whereas mechanical pain was increased in the model of neuropathic pain only. Thus, nociceptive and neuropathic pain belongs--in addition to behavioral changes--among the parameters which are affected in described animal models of schizophrenia. PMID:20406041

  1. Uncommon Causes of Acute Abdominal Pain – A Pictorial Essay

    PubMed Central

    Hariharan, Mahesh; Balasubramaniam, Rajan; Shetty, Sharath Kumar; Yadavalli, Shanthala; Ahetasham, Mohammed; Devarapalli, Sravya

    2016-01-01

    Acute abdomen is one of the most common clinical conditions requiring a radiological investigation. Ultrasound is the primary modality of choice which can diagnose some of the common causes of acute abdomen. However, sometimes the underlying cause for the pain is far more complicated than expected mandating a high degree of suspicion to suggest further investigation with contrast enhanced computed tomography or magnetic resonance imaging. Here, we have compiled a comprehensive series of selected cases to highlight the conditions which can be easily overlooked unless carefully sought for. This article also emphasizes the importance of multimodality approach to arrive at the final diagnosis with an increased overall diagnostic accuracy which in turn improves patient management and prognosis. PMID:27014500

  2. [Meloxicam-induced colitis revealed by acute abdominal pain].

    PubMed

    Seddik, H; Rabhi, M

    2013-03-01

    Whether intestinal toxicity of preferential or selective COX-2 inhibitors is reduced compared with that of standard NSAIDs is controversial. A 26-year-old woman presented with acute abdominal pain and bloody diarrhoea a few days after beginning meloxicam treatment. Endoscopic examination of the colon showed erythematous and ulcerative lesions involving 15 cm of the left colon. No aetiology has been found for colitis. Diarrhea disappeared 1 week after meloxicam was stopped. Total colonoscopy 3 months and 2 years later was normal. The role of meloxicam in the etiology of colitis was considered plausible. This report and a few other cases in the literature suggest that cyclooxygenase-2 selective non-steroidal anti-inflammatory drug inhibitor toxicity should be investigated in case of unexplained acute colitis. PMID:23537413

  3. Kaempferol, a dietary flavonoid, ameliorates acute inflammatory and nociceptive symptoms in gastritis, pancreatitis, and abdominal pain.

    PubMed

    Kim, Shi Hyoung; Park, Jae Gwang; Sung, Gi-Ho; Yang, Sungjae; Yang, Woo Seok; Kim, Eunji; Kim, Jun Ho; Ha, Van Thai; Kim, Han Gyung; Yi, Young-Su; Kim, Ji Hye; Baek, Kwang-Soo; Sung, Nak Yoon; Lee, Mi-nam; Kim, Jong-Hoon; Cho, Jae Youl

    2015-07-01

    Kaempferol (KF) is the most abundant polyphenol in tea, fruits, vegetables, and beans. However, little is known about its in vivo anti-inflammatory efficacy and mechanisms of action. To study these, several acute mouse inflammatory and nociceptive models, including gastritis, pancreatitis, and abdominal pain were employed. Kaempferol was shown to attenuate the expansion of inflammatory lesions seen in ethanol (EtOH)/HCl- and aspirin-induced gastritis, LPS/caerulein (CA) triggered pancreatitis, and acetic acid-induced writhing. PMID:25917334

  4. Interaction between Analgesic Effect of Nano and Conventional size of Zinc Oxide and Opioidergic System Activity in Animal Model of Acute Pain

    PubMed Central

    Kesmati, Mahnaz; Torabi, Mozhgan

    2014-01-01

    Introduction Today Nano-medicine tries to produce new drugs to reduce the dosage and side effects of their conventional forms. According to the interaction between zinc and opioidergic system activity, this study has investigated the effect of new kind of zinc supplement, nano zinc oxide (nZnO), in compared to its conventional form (cZnO), in presence and absence of opioidergic system activity on acute pain. Methods Adult male Wistar rats (weighting 200±20gr) divided into groups: control (receiving saline %0.9), nZnO (1, 5, 10, 20 mg/kg), cZnO (1, 5, 10, 20 mg/kg), naloxone 1mg/kg, morphine 6 mg/kg, and co-injected groups of morphine and/or naloxone with nZnO (5mg/kg) and/or cZnO 10 mg/kg. Hot plate assay was used to evaluation of nociception and post injected latencies were recorded every 30 min for 90 min after I.P. injections of drugs. In co-injected groups latency time recorded after 60 minutes. Results Data indicated that both of ZnO supplements reduced latency time in dose and time dependent on the effect of nZnO was higher than cZnO. Also these components could improve anti-nociception effect of morphine and naloxone could not change the effect of these supplements. Discussion It seems that nZnO has more efficacy than its conventional form to showing analgesic effect that probably is related to the physicochemical properties of nZnO. Also may be these supplements have interaction with opioideric system in body. PMID:25436088

  5. Rethinking Cocaine-Associated Chest Pain and Acute Coronary Syndromes

    PubMed Central

    Finkel, Jonathan B.; Marhefka, Gregary D.

    2011-01-01

    Every year more than 500,000 patients present to the emergency department with cocaine-associated complications, most commonly chest pain. Many of these patients undergo extensive work-up and treatment. Much of the evidence regarding cocaine’s cardiovascular effects, as well as the current management of cocaine-associated chest pain and acute coronary syndromes, is anecdotally derived and based on studies written more than 2 decades ago that involved only a few patients. Newer studies have brought into question many of the commonly held theories and practices regarding the etiology, diagnosis, and treatment of this common clinical scenario. However, there continues to be a paucity of prospective, randomized trials addressing this topic as it relates to clinical outcomes. We searched PubMed for English-language articles from 1960 to 2011 using the keywords cocaine, chest pain, coronary arteries, myocardial infarction, emergency department, cardiac biomarkers, electrocardiogram, coronary computed tomography, observation unit, β-blockers, benzodiazepines, nitroglycerin, calcium channel blockers, phentolamine, and cardiomyopathy; including various combinations of these terms. We reviewed the abstracts to confirm relevance, and then full articles were extracted. References from extracted articles were also reviewed for relevant articles. In this review, we critically evaluate the limited historical evidence underlying the current teachings on cocaine’s cardiovascular effects and management of cocaine-associated chest pain. We aim to update the reader on more recent, albeit small, studies on the emergency department evaluation and clinical and pharmacologic management of cocaine-associated chest pain. Finally, we summarize recent guidelines and review an algorithm based on the current best evidence. PMID:22134939

  6. Sublingual Sufentanil: A Review in Acute Postoperative Pain.

    PubMed

    Frampton, James E

    2016-04-01

    The sufentanil sublingual tablet system (SSTS; Zalviso(®)) is a novel patient-controlled analgesia (PCA) device intended to overcome some of the drawbacks of opioid-based intravenous PCA (IV-PCA). Based on the results of three phase III studies, the SSTS has been approved in the EU for the management of acute moderate to severe postoperative pain in adults in a hospital setting. In a head-to-head comparison with morphine, the gold standard for opioid-based IV-PCA, the SSTS was associated with a more rapid onset of analgesia and higher rates of success, based on patient and healthcare professional global assessments of the method of pain control. Patients and healthcare professionals also rated the SSTS as being easier to use and expressed a greater level of overall satisfaction with this device. The SSTS was generally well tolerated, with an adverse event profile typical of that of other opioids and generally similar to that of placebo. By virtue of its preprogrammed, noninvasive design, the SSTS avoids the risk of pump programming errors and other complications (e.g. infections and analgesic gaps) that can occur with IV-PCA technology; it also imposes less restriction on postoperative mobility. As such, the SSTS provides an effective alternative to opioid-based IV-PCA for the management of acute moderate to severe postoperative pain. Future studies should ideally focus on evaluating the relative cost effectiveness of the SSTS and comparing it with other available needle-free PCA modalities. PMID:27067596

  7. Diagnosis and treatment of acute low back pain.

    PubMed

    Casazza, Brian A

    2012-02-15

    Acute low back pain is one of the most common reasons for adults to see a family physician. Although most patients recover quickly with minimal treatment, proper evaluation is imperative to identify rare cases of serious underlying pathology. Certain red flags should prompt aggressive treatment or referral to a spine specialist, whereas others are less concerning. Serious red flags include significant trauma related to age (i.e., injury related to a fall from a height or motor vehicle crash in a young patient, or from a minor fall or heavy lifting in a patient with osteoporosis or possible osteoporosis), major or progressive motor or sensory deficit, new-onset bowel or bladder incontinence or urinary retention, loss of anal sphincter tone, saddle anesthesia, history of cancer metastatic to bone, and suspected spinal infection. Without clinical signs of serious pathology, diagnostic imaging and laboratory testing often are not required. Although there are numerous treatments for nonspecific acute low back pain, most have little evidence of benefit. Patient education and medications such as nonsteroidal anti-inflammatory drugs, acetaminophen, and muscle relaxants are beneficial. Bed rest should be avoided if possible. Exercises directed by a physical therapist, such as the McKenzie method and spine stabilization exercises, may decrease recurrent pain and need for health care services. Spinal manipulation and chiropractic techniques are no more effective than established medical treatments, and adding them to established treatments does not improve outcomes. No substantial benefit has been shown with oral steroids, acupuncture, massage, traction, lumbar supports, or regular exercise programs. PMID:22335313

  8. Unusual case of acute neck pain: acute calcific longus colli tendinitis.

    PubMed

    Joshi, Gunjan S; Fomin, Daren A; Joshi, Gargi S; Serano, Richard D

    2016-01-01

    Acute calcific longus colli tendinitis (ACLCT), a very rare cause of severe neck pain, dysphagia and odynophagia, is often mistaken for other common causes of neck pain. However, prompt recognition of this uncommon presentation is important to prevent unnecessary medical and surgical intervention. A 46-year-old Caucasian man presented with a 1-day history of severe neck pain, headache and odynophagia. The patient was afebrile with stable vital signs, however, the laboratory data showed mildly elevated C reactive protein and erythrocyte sedimentation rate. The physical examination was remarkable for markedly reduced cervical range of motion. MRI revealed the pathognomonic findings of paravertebral oedema and calcification. The definitive diagnosis of ACLCT was made and the patient was successfully managed with a short course of oral steroid, benzodiazepine and aural acupuncture, with complete resolution of the condition within a week. PMID:27257001

  9. Development and Validation of the Youth Acute Pain Functional Ability Questionnaire (YAPFAQ)

    PubMed Central

    Zempsky, William T; O’Hara, Emily A; Santanelli, James P; New, Tamara; Smith-Whitley, Kim; Casella, James; Palermo, Tonya M.

    2014-01-01

    Physical function and functional recovery are important aspects of the acute pain experience in children and adolescents in hospitalized settings. Measures of function related to pediatric acute pain do not exist currently, limiting understanding of recovery in youth undergoing acute and procedural pain. To address this gap, we developed and assessed the clinical utility and preliminary validity of the Youth Acute Pain Functional Ability Questionnaire (YAPFAQ). We evaluated psychometric properties of this measure in 159 patients with sickle cell disease, ages 7–21 years who were hospitalized for vasoocclusive episodes at four urban children’s hospitals. The YAPFAQ demonstrated strong internal reliability and test-retest reliability. An exploratory factor analysis (EFA) was conducted to examine the preliminary factor structure, and to help reduce the number of items for the final scale. Evidence for moderate construct validity was demonstrated among validated measures of pain burden, motor function, functional ability and quality of life. The YAPFAQ is a new measure of youth functional ability in the acute pain setting. Further evaluation of this measure in additional pediatric populations is needed to understand applicability across a spectrum of youth experiencing acute pain related to illness, trauma, and medical/surgical procedures. PERSPECTIVE Measures of function in response to acute pain are needed in order to more comprehensively evaluate acute pain interventions in pediatrics; however, no specific measures are available. Our preliminary psychometric evaluation of an acute pain functional ability measure for youth indicates that it may be a promising tool for further refinement in additional pediatric acute pain populations. PMID:25277425

  10. Pain Assessment with Cognitively Impaired Older People in the Acute Hospital Setting

    PubMed Central

    2011-01-01

    Research reveals that older people continue to experience much suffering from acute and chronic pain conditions. People with cognitive impairment receive less analgesia than their cognitively intact peers. Postoperative pain assessment with older people in the acute hospital setting remains a challenge. Context and culture have a significant impact of pain assessment practices. Due to a paucity of research exploring how pain assessment and management practices with cognitively impaired older people may be realised in the acute hospital setting, there is a need for further research to be conducted. PMID:26524985

  11. TRPM8 is the principal mediator of menthol-induced analgesia of acute and inflammatory pain.

    PubMed

    Liu, Boyi; Fan, Lu; Balakrishna, Shrilatha; Sui, Aiwei; Morris, John B; Jordt, Sven-Eric

    2013-10-01

    Menthol, the cooling natural product of peppermint, is widely used in medicinal preparations for the relief of acute and inflammatory pain in sports injuries, arthritis, and other painful conditions. Menthol induces the sensation of cooling by activating TRPM8, an ion channel in cold-sensitive peripheral sensory neurons. Recent studies identified additional targets of menthol, including the irritant receptor, TRPA1, voltage-gated ion channels and neurotransmitter receptors. It remains unclear which of these targets contribute to menthol-induced analgesia, or to the irritating side effects associated with menthol therapy. Here, we use genetic and pharmacological approaches in mice to probe the role of TRPM8 in analgesia induced by L-menthol, the predominant analgesic menthol isomer in medicinal preparations. L-menthol effectively diminished pain behavior elicited by chemical stimuli (capsaicin, acrolein, acetic acid), noxious heat, and inflammation (complete Freund's adjuvant). Genetic deletion of TRPM8 completely abolished analgesia by L-menthol in all these models, although other analgesics (acetaminophen) remained effective. Loss of L-menthol-induced analgesia was recapitulated in mice treated with a selective TRPM8 inhibitor, AMG2850. Selective activation of TRPM8 with WS-12, a menthol derivative that we characterized as a specific TRPM8 agonist in cultured sensory neurons and in vivo, also induced TRPM8-dependent analgesia of acute and inflammatory pain. L-menthol- and WS-12-induced analgesia was blocked by naloxone, suggesting activation of endogenous opioid-dependent analgesic pathways. Our data show that TRPM8 is the principal mediator of menthol-induced analgesia of acute and inflammatory pain. In contrast to menthol, selective TRPM8 agonists may produce analgesia more effectively, with diminished side effects. PMID:23820004

  12. TRPM8 is the Principal Mediator of Menthol-induced Analgesia of Acute and Inflammatory Pain

    PubMed Central

    Liu, Boyi; Fan, Lu; Balakrishna, Shrilatha; Sui, Aiwei; Morris, John B.; Jordt, Sven-Eric

    2013-01-01

    Menthol, the cooling natural product of peppermint, is widely used in medicinal preparations for the relief of acute and inflammatory pain in sports injuries, arthritis and other painful conditions. Menthol induces the sensation of cooling by activating TRPM8, an ion channel in cold-sensitive peripheral sensory neurons. Recent studies identified additional targets of menthol, including the irritant receptor, TRPA1, voltage-gated ion channels and neurotransmitter receptors. It remains unclear which of these targets contribute to menthol-induced analgesia, or to the irritating side effects associated with menthol therapy. Here, we use genetic and pharmacological approaches in mice to probe the role of TRPM8 in analgesia induced by L-menthol, the predominant analgesic menthol isomer in medicinal preparations. L-menthol effectively diminished pain behavior elicited by chemical stimuli (capsaicin, acrolein, acetic acid), noxious heat and inflammation (complete Freund's adjuvant). Genetic deletion of TRPM8 completely abolished analgesia by L-menthol in all these models, while other analgesics (acetaminophen) remained effective. Loss of L-menthol-induced analgesia was recapitulated in mice treated with a selective TRPM8 inhibitor, AMG2850. Selective activation of TRPM8 with WS-12, a menthol derivative we characterized as a specific TRPM8 agonist in cultured sensory neurons and in vivo, also induced TRPM8-dependent analgesia of acute and inflammatory pain. L-menthol and WS-12 induced analgesia was blocked by naloxone, suggesting activation of endogenous opioid-dependent analgesic pathways. Our data show that TRPM8 is the principal mediator of menthol-induced analgesia of acute and inflammatory pain. In contrast to menthol, selective TRPM8 agonists may produce analgesia more effectively with diminished side effects. PMID:23820004

  13. Genotyping Test with Clinical Factors: Better Management of Acute Postoperative Pain?

    PubMed Central

    Hajj, Aline; Peoc’h, Katell; Laplanche, Jean-Louis; Jabbour, Hicham; Naccache, Nicole; Abou Zeid, Hicham; Yazbeck, Patricia; Rabbaa Khabbaz, Lydia

    2015-01-01

    Individualization of acute postoperative pain treatment on an evidence-based decision process is a major health concern. The aim of this study is to investigate the influence of genetic and non-genetic factors on the variability of response to morphine in acute postoperative pain. A group of nighty-five patients undergoing major surgery were included prospectively. At 24 h, a logistic regression model was carried out to determine the factors associated with morphine doses given by a Patient Controlled Analgesia device. The dose of morphine was associated with age (p = 0.011), patient weight (p = 0.025) and the duration of operation (p = 0.030). This dose decreased with patient’s age and duration of operation and increased with patient’s weight. OPRM1 and ABCB1 polymorphisms were significantly associated with administered dose of morphine (p = 0.038 and 0.012 respectively). Patients with at least one G allele for c.118A>G OPRM1 polymorphism (AG/GG) needed 4 times the dose of morphine of AA patients. Additionally, patients with ABCB1 CT and CC genotypes for c.3435C>T polymorphism were 5.6 to 7.1 times more prone to receive higher dose of morphine than TT patients. Our preliminary results support the evidence that OPRM1/ABCB1 genotypes along with age, weight and duration of operation have an impact on morphine consumption for acute postoperative pain treatment. PMID:25809606

  14. Acute postoperative pain predicts chronic pain and long-term analgesic requirements after breast surgery for cancer.

    PubMed

    Fassoulaki, A; Melemeni, A; Staikou, C; Triga, A; Sarantopoulos, C

    2008-01-01

    Postoperative pain and analgesic requirements may be associated with chronic pain. The aim of the study was to investigate this association. We studied 98 patients who had cancer breast surgery and served as controls in four previous studies, receiving placebo. We compared the pain and analgesic requirements 0-9 h and 1-6 days postoperatively: a) between patients with chronic pain 3 months postoperatively versus patients without and b) between those patients who consumed analgesics at home versus those who did not. Patients with chronic pain had experienced higher intensity pain at rest the first 9 postoperative hours (VAS-rest p = 0.033). Patients requiring analgesics at home had consumed postoperatively more opioids (p = 0.005) and more paracetamol (p = 0.037). These patients had experienced pain of higher intensity the first 9 postoperative hours (VAS-rest p = 0.022, VAS-movement p = 0.009) as well as during the six postoperative days (VAS-rest p = 0.013, VAS-movement p = 0.001). Higher intensities of acute postoperative pain are associated with chronic pain development. Higher analgesic needs and higher acute postoperatively pain intensity are associated with long-term analgesic consumption. PMID:19235522

  15. [Postoperative pain management. Aims and organization of a strategy for postoperative acute pain therapy].

    PubMed

    Nolli, M; Nicosia, F

    2000-09-01

    The Health Services, not only the Italian one, is under pressure because of request for improving treatment quality and the financial need for reorganization and cost-saving. It's required a rationalization of intervention, together with a careful choice of the best and cheapest techniques and the demonstration of their efficacy. The anaesthesia service activity, in a period of cost rationalization and funds restriction should be aimed to appropriate outcome measures corrected by both patient's risk factors and surgical-anaesthesiological case-mix. The development of a complete strategy for surgical pain management might run into two phases. The first phase, internal and mono-specialistic, should develop like the creation of an Acute Pain Team. The main processes are: focusing the problem (charge of the care), training, information, teaching methodology (timing, methods, drugs, techniques, etc.) and the audit (before and after changes). The main aims are the evaluation of the level of analgesia and pain relief or patient's satisfaction which are partial endpoints useful to demonstrate the improvement and the efficacy of the new pain management strategies. The second phase, multidisciplinary, is directed toward the creation of a Postoperative Evaluation Team. The main objective is to set up a collaborative clinical group able to identify the criteria for quality, efficacy and safety. The major purpose is the evaluation of major outcome measures: surgical outcome, morbidity, mortality and length of hospitalization. The improvement in the quality of postoperative pain treatment goes through a better organization and a progressive increase of the already available therapy. The achievement of the result and the quality projects depend on the interaction among staff members with different behaviours and settings. Internal teaching and training, continuous education for doctors and nurses, and external information, marketing and improvement of attractive capability of

  16. Unintentional overdose of analgesia secondary to acute dental pain.

    PubMed

    Dodd, M D; Graham, C A

    2002-08-24

    Three cases of unintentional overdose with simple analgesics are presented. Over a two month period, these patients presented to the accident and emergency (A&E) department with acute dental pain, outside normal working hours, having been unable to access emergency dental care. In one case the patient's reason for attendance was to obtain further supplies of analgesics. The patients required admission for assessment of the severity of the overdose in addition to advice about appropriate use of analgesics and advice on access to dental care. None of the patients required treatment for the overdose. These cases serve as a timely reminder of the importance of taking an accurate drug history in emergency situations. They also raise issues of patient education for self medication and access to emergency dental services outside normal working hours. PMID:12222908

  17. A Patient with Acute Kidney Pain and High Blood Pressure

    PubMed Central

    Soulen, Michael C.

    2015-01-01

    This case presented challenging diagnostic and management issues in a young healthy man who presented with abdominal pain and new-onset hypertension. The differential diagnosis evolved over the course of the clinical presentation. The patient had severe vascular involvement of his renal and basal cerebral arteries that initially was assumed to be due to a vasculitic process or hypercoagulable state. Finally it became apparent that the patient did not have a systemic illness but rather a localized vascular disease most likely due to segmental arterial mediolysis, a rare, under-recognized condition that can potentially be fatal. This condition is often difficult to distinguish from fibromuscular dysplasia. It is important to recognize and correctly diagnose the condition, particularly in the acute phase of the disease, because delay in diagnosis can contribute to morbidity and mortality. PMID:25583291

  18. The pain of pain: challenges of animal behavior models.

    PubMed

    Barrett, James E

    2015-04-15

    Berend Olivier has had a long-standing interest in the utility of animal models for a wide variety of therapeutic indications. His work has spanned multiple types of models, blending ethological, or species typical and naturalistic behaviors, along with methodologies based on learned behavior. He has consistently done so, from an analytical as well as predictive perspective, and has made multiple contributions while working in both the pharmaceutical industry and within an academic institution. Although focused primarily on psychiatric disorders, Berend has conducted research in the area of pain in humans and in animals, demonstrating an expansive appreciation for the breadth, scope and significance of the science and applications of the discipline of pharmacology to these diverse areas. This review focuses on the use of animal models in pain research from the perspective of the long-standing deficiencies in the development of therapeutics in this area and from a preclinical perspective where the translational weaknesses have been quite problematic. The challenges confronting animal models of pain, however, are not unique to this area of research, as they cut across several therapeutic areas. Despite the deficiencies, failures and concerns, existing animal models of pain continue to be of widespread use and are essential to progress in pain research as well as in other areas. Although not focusing on specific animal models of pain, this paper seeks to examine general issues facing the use of these models. It does so by exploring alternative approaches which capture recent developments, which build upon principles and concepts we have learned from Berend's contributions, and which provide the prospect of helping to address the absence of novel therapeutics in this area. PMID:25583180

  19. [Management of acute pain therapy: guidelines, recommendations and current practice in german hospitals].

    PubMed

    Erlenwein, Joachim

    2016-01-01

    Organisational requirements and the education and training of stuff provide the basis for an adequate supply of quality in acute pain and should be the focus of efforts. Although organizational recommendations of the German guideline on "treatment of acute perioperative and post-traumatic pain" have been increasingly established in practice within the last few years, in many German hospitals there is still lagging far behind in the implementation of general supply conditions, such as regular pain measurement or the introduction of appropriate standardized treatment protocols for all areas of the hospital.As specialized care structures acute pain services have been implemented in 80% of the German hospitals, but only 45% of them meet quality criteria. Due to the heterogeneous realization of acute pain management in different hospitals, it comes apparent, that general guideline recommendations and binding definitions are required to achieve adequate supply conditions. PMID:26863643

  20. A multidimensional model for understanding cancer pain.

    PubMed

    Wool, Margaret S; Mor, Vincent

    2005-01-01

    The experience of pain pervades the physical and psychosocial domains of a patient's existence. It has a concrete underpinning in the form of an injury or disease process, yet subjective responses to pain sensations are psychosocial processes that influence the experience of pain and the capacity to cope with it. Anticipation of pain is one of the key fears associated with cancer, and uncontrolled pain strips away morale and quality of life. The interacting biopsychosocial dimensions are important areas for consideration in the comprehensive, skillful approach to assessment and treatment of cancer pain. This article addresses the interactive relationships between pain and mood using the biopsychosocial model as a heuristic for assessment. PMID:16377591

  1. Beyond pain: modeling decision-making deficits in chronic pain

    PubMed Central

    Hess, Leonardo Emanuel; Haimovici, Ariel; Muñoz, Miguel Angel; Montoya, Pedro

    2014-01-01

    Risky decision-making seems to be markedly disrupted in patients with chronic pain, probably due to the high cost that impose pain and negative mood on executive control functions. Patients’ behavioral performance on decision-making tasks such as the Iowa Gambling Task (IGT) is characterized by selecting cards more frequently from disadvantageous than from advantageous decks, and by switching often between competing responses in comparison with healthy controls (HCs). In the present study, we developed a simple heuristic model to simulate individuals’ choice behavior by varying the level of decision randomness and the importance given to gains and losses. The findings revealed that the model was able to differentiate the behavioral performance of patients with chronic pain and HCs at the group, as well as at the individual level. The best fit of the model in patients with chronic pain was yielded when decisions were not based on previous choices and when gains were considered more relevant than losses. By contrast, the best account of the available data in HCs was obtained when decisions were based on previous experiences and losses loomed larger than gains. In conclusion, our model seems to provide useful information to measure each individual participant extensively, and to deal with the data on a participant-by-participant basis. PMID:25136301

  2. Beyond pain: modeling decision-making deficits in chronic pain.

    PubMed

    Hess, Leonardo Emanuel; Haimovici, Ariel; Muñoz, Miguel Angel; Montoya, Pedro

    2014-01-01

    Risky decision-making seems to be markedly disrupted in patients with chronic pain, probably due to the high cost that impose pain and negative mood on executive control functions. Patients' behavioral performance on decision-making tasks such as the Iowa Gambling Task (IGT) is characterized by selecting cards more frequently from disadvantageous than from advantageous decks, and by switching often between competing responses in comparison with healthy controls (HCs). In the present study, we developed a simple heuristic model to simulate individuals' choice behavior by varying the level of decision randomness and the importance given to gains and losses. The findings revealed that the model was able to differentiate the behavioral performance of patients with chronic pain and HCs at the group, as well as at the individual level. The best fit of the model in patients with chronic pain was yielded when decisions were not based on previous choices and when gains were considered more relevant than losses. By contrast, the best account of the available data in HCs was obtained when decisions were based on previous experiences and losses loomed larger than gains. In conclusion, our model seems to provide useful information to measure each individual participant extensively, and to deal with the data on a participant-by-participant basis. PMID:25136301

  3. Pain relief model for a COX-2 inhibitor in patients with postoperative dental pain

    PubMed Central

    Rohatagi, Shashank; Kastrissios, Helen; Sasahara, Kunihiro; Truitt, Kenneth; Moberly, James B; Wada, Russell; Salazar, Daniel E

    2008-01-01

    AIM To develop a pain relief model for a cyclooxygenase (COX)-2 inhibitor, CS-706, that permits prediction of doses for acute pain relief in Japanese and Western populations. METHODS A categorical response model was developed to describe the probability of pain relief (PR) over time for a Phase 2a study. Models were also developed to describe patient's use of rescue medication and onset of pain relief. RESULTS The placebo response was described by a first-order increase in PR that achieved a stable response after 4 h. The effect of CS-706 on PR was described using an Emax model; the plasma concentration of CS-706 producing 50% of the maximum response was estimated to be 87 ng ml−1, the median peak plasma concentration achieved after a 50-mg oral dose. The probability of rescue medication (REMD) decreased over time and was a function of the last observed PR score. This probability was < 16% for patients with a PR score ≥2. The probability of experiencing meaningful PR was 98% in patients who did not require REMD and 47% in those who required REMD. For patients who did not require REMD, the median onset time of meaningful pain relief (TMPR) decreased with increasing doses. In patients who required REMD, there was a saturable decline in TMPR, with the greatest improvement occurring from placebo to 50-mg doses. CONCLUSIONS The set of models developed permitted compilation of multiple dose–response curves for dose selection of CS-706 in Westerners and facilitated scaling of doses to a Japanese population. WHAT IS ALREADY KNOWN ABOUT THIS SUBJECT Modelling and simulation are being increasingly used to support decision-making in new drug development.Novel modelling methods are required to capture the complexity of multiple end-points for a disease and to address questions such as dose selection in various populations.The focus of this study was to present a novel pain relief model to address such questions. WHAT THIS STUDY ADDS New contributions of this work to the

  4. Meperidine (pethidine) versus morphine in acute pain management of opioid-dependent patients

    PubMed Central

    Solhi, Hassan; Sanaei-Zadeh, Hossein; Solhi, Sadra; Azizi Nadian, Mohammad Ali; Gharibi, Morteza; Sadeghi Sedeh, Bahman

    2016-01-01

    The present study aimed to evaluate the effectiveness of morphine and meperidine (pethidine) as pain relief in opioid-dependent patients with acute pain. A total of 122 opioid-dependent patients with acute pain were included in the study. Their pain severity was assessed, using visual analog scale (VAS) scores ranging from 0 to 10. The patients randomly received intravenous morphine (up to 0.15 mg/kg) or meperidine (up to 1.5 mg/kg) for pain control by patient control analgesia (PCA) pump. The clinical opioid withdrawal scale (COWS) was employed for the assessment of withdrawal symptoms. The pain relief and the emergence of withdrawal symptoms were measured at 15, 30, and 60 minutes after drug administration. The patients who received morphine reported a better pain control compared to those who received meperidine (mean ± standard deviation [SD] VAS scores 4.11±1.90 vs 5.85±2.08 at the end of the study; P<0.001). On the other hand, the patients who received meperidine indicated prominent withdrawal symptoms (mean ± SD COWS scores 4.80±2.18 vs. 1.98±0.82 at the end of the study; P<0.001). Our findings revealed that morphine can be recommended in acute pain management of opioid-dependent patients. In addition, emergency physicians should ask their patients about any drug dependence before selecting the appropriate drug for their acute pain management.

  5. Meperidine (pethidine) versus morphine in acute pain management of opioid-dependent patients.

    PubMed

    Solhi, Hassan; Sanaei-Zadeh, Hossein; Solhi, Sadra; Azizi Nadian, Mohammad Ali; Gharibi, Morteza; Sadeghi Sedeh, Bahman

    2016-01-01

    The present study aimed to evaluate the effectiveness of morphine and meperidine (pethidine) as pain relief in opioid-dependent patients with acute pain. A total of 122 opioid-dependent patients with acute pain were included in the study. Their pain severity was assessed, using visual analog scale (VAS) scores ranging from 0 to 10. The patients randomly received intravenous morphine (up to 0.15 mg/kg) or meperidine (up to 1.5 mg/kg) for pain control by patient control analgesia (PCA) pump. The clinical opioid withdrawal scale (COWS) was employed for the assessment of withdrawal symptoms. The pain relief and the emergence of withdrawal symptoms were measured at 15, 30, and 60 minutes after drug administration. The patients who received morphine reported a better pain control compared to those who received meperidine (mean ± standard deviation [SD] VAS scores 4.11±1.90 vs 5.85±2.08 at the end of the study; P<0.001). On the other hand, the patients who received meperidine indicated prominent withdrawal symptoms (mean ± SD COWS scores 4.80±2.18 vs. 1.98±0.82 at the end of the study; P<0.001). Our findings revealed that morphine can be recommended in acute pain management of opioid-dependent patients. In addition, emergency physicians should ask their patients about any drug dependence before selecting the appropriate drug for their acute pain management. PMID:27621675

  6. Spared nerve injury model to study orofacial pain

    PubMed Central

    Pozza, Daniel Humberto; Castro-Lopes, José Manuel; Neto, Fani Lourença; Avelino, António

    2016-01-01

    Background & objectives: There are many difficulties in generating and testing orofacial pain in animal models. Thus, only a few and limited models that mimic the human condition are available. The aim of the present research was to develop a new model of trigeminal pain by using a spared nerve injury (SNI) surgical approach in the rat face (SNI-face). Methods: Under anaesthesia, a small incision was made in the infraorbital region of adult male Wistar rats. Three of the main infraorbital nerve branches were tightly ligated and a 2 mm segment distal to the ligation was resected. Control rats were sham-operated by exposing the nerves. Chemical hyperalgesia was evaluated 15 days after the surgery by analyzing the time spent in face grooming activity and the number of head withdrawals in response to the orofacial formalin test. Results: SNI-face rats presented a significant increase of the formalin-induced pain-related behaviours evaluated both in the acute and tonic phases (expected biphasic pattern), in comparison to sham controls. Interpretation & conclusions: The SNI-face model in the rat appears to be a valid approach to evaluate experimental trigeminal pain. Ongoing studies will test the usefulness of this model to evaluate therapeutic strategies for the treatment of orofacial pain. PMID:27241642

  7. Research design considerations for single-dose analgesic clinical trials in acute pain: IMMPACT recommendations.

    PubMed

    Cooper, Stephen A; Desjardins, Paul J; Turk, Dennis C; Dworkin, Robert H; Katz, Nathaniel P; Kehlet, Henrik; Ballantyne, Jane C; Burke, Laurie B; Carragee, Eugene; Cowan, Penney; Croll, Scott; Dionne, Raymond A; Farrar, John T; Gilron, Ian; Gordon, Debra B; Iyengar, Smriti; Jay, Gary W; Kalso, Eija A; Kerns, Robert D; McDermott, Michael P; Raja, Srinivasa N; Rappaport, Bob A; Rauschkolb, Christine; Royal, Mike A; Segerdahl, Märta; Stauffer, Joseph W; Todd, Knox H; Vanhove, Geertrui F; Wallace, Mark S; West, Christine; White, Richard E; Wu, Christopher

    2016-02-01

    This article summarizes the results of a meeting convened by the Initiative on Methods, Measurement, and Pain Assessment in Clinical Trials (IMMPACT) on key considerations and best practices governing the design of acute pain clinical trials. We discuss the role of early phase clinical trials, including pharmacokinetic-pharmacodynamic (PK-PD) trials, and the value of including both placebo and active standards of comparison in acute pain trials. This article focuses on single-dose and short-duration trials with emphasis on the perioperative and study design factors that influence assay sensitivity. Recommendations are presented on assessment measures, study designs, and operational factors. Although most of the methodological advances have come from studies of postoperative pain after dental impaction, bunionectomy, and other surgeries, the design considerations discussed are applicable to many other acute pain studies conducted in different settings. PMID:26683233

  8. Development of Cardiovascular Indices of Acute Pain Responding in Infants: A Systematic Review

    PubMed Central

    Waxman, Jordana A.; Pillai Riddell, Rebecca R.; Tablon, Paula; Schmidt, Louis A.; Pinhasov, Angelina

    2016-01-01

    Background. Cardiovascular indices of pain are pervasive in the hospital setting. However, no prospective research has examined the development of cardiac responses to acutely painful procedures in the first year of life. Objectives. Our main goal was to synthesize existing evidence regarding the development of cardiovascular responses to acutely painful medical procedures over the first year of life in preterm and term born infants. Methods. A systematic search retrieved 6994 articles to review against inclusion criteria. A total of 41 studies were included in the review. Results. In response to acutely painful procedures, most infants had an increase in mean heart rate (HR) that varied in magnitude both across and within gestational and postnatal ages. Research in the area of HR variability has been inconsistent, limiting conclusions. Conclusions. Longitudinal research is needed to further understand the inherent variability of cardiovascular pain responses across and within gestational and postnatal ages and the causes for the variability. PMID:27445630

  9. Abdominal Lymphatic Malformation Presenting as Acute Abdominal Pain: A Common Pediatric Complaint, but an Unusual Diagnosis.

    PubMed

    Cruz, Christopher I; Farrell, Caitlin A; Nelson, Kyle A; Levy, Jason A

    2016-05-01

    We present the clinical and radiological findings involving a mesenteric lymphatic malformation causing volvulus in a toddler presenting with acute abdominal pain, as well as its treatment options. PMID:27139293

  10. Computational modeling of peripheral pain: a commentary.

    PubMed

    Argüello, Erick J; Silva, Ricardo J; Huerta, Mónica K; Avila, René S

    2015-01-01

    This commentary is intended to find possible explanations for the low impact of computational modeling on pain research. We discuss the main strategies that have been used in building computational models for the study of pain. The analysis suggests that traditional models lack biological plausibility at some levels, they do not provide clinically relevant results, and they cannot capture the stochastic character of neural dynamics. On this basis, we provide some suggestions that may be useful in building computational models of pain with a wider range of applications. PMID:26062616

  11. Postoperative sleep disruptions: a potential catalyst of acute pain?

    PubMed

    Chouchou, Florian; Khoury, Samar; Chauny, Jean-Marc; Denis, Ronald; Lavigne, Gilles J

    2014-06-01

    Despite the substantial advances in the understanding of pain mechanisms and management, postoperative pain relief remains an important health care issue. Surgical patients also frequently report postoperative sleep complaints. Major sleep alterations in the postoperative period include sleep fragmentation, reduced total sleep time, and loss of time spent in slow wave and rapid eye movement sleep. Clinical and experimental studies show that sleep disturbances may exacerbate pain, whereas pain and opioid treatments disturb sleep. Surgical stress appears to be a major contributor to both sleep disruptions and altered pain perception. However, pain and the use of opioid analgesics could worsen sleep alterations, whereas sleep disruptions may contribute to intensify pain. Nevertheless, little is known about the relationship between postoperative sleep and pain. Although the sleep-pain interaction has been addressed from both ends, this review focuses on the impact of sleep disruptions on pain perception. A better understanding of the effect of postoperative sleep disruptions on pain perception would help in selecting patients at risk for more severe pain and may facilitate the development of more effective and safer pain management programs. PMID:24074687

  12. Evaluation of acute right upper quadrant pain: sonography and /sup 99m/Tc-PIPIDA cholescintigraphy

    SciTech Connect

    Shuman, W.P.; Mack, L.A.; Rudd, T.G.; Rogers, J.V.; Gibbs, P.

    1982-07-01

    A group of 75 patients with acute right upper quadrant pain was evaluated with both sonography and cholescintigraphy. Accuracy in screening for gallbladder disease was significantly greater with sonography (96%) than with cholescintigraphy (74%). For selecting patients with acute cholecystitis from this population that included acute and chronic cholecystitis as well as nonbiliary pathology, PIPIDA was less accurate (77%) than might be expected based on previous reports primarily due to false positive nonvisualization caused by chronic cholecystitis. Of patients with nonbiliary pathology, sonography was able to detect the cause of the right upper quadrant pain in 21%. Patients with acute right upper quadrant pain should first be screened with sonography. If cholescintigraphy is subsequently used for suspected acute cholecystitis, positive results should be interpreted with caution before surgery is planned.

  13. Multidetector CT in emergency radiology: acute and generalized non-traumatic abdominal pain.

    PubMed

    Paolantonio, Pasquale; Rengo, Marco; Ferrari, Riccardo; Laghi, Andrea

    2016-05-01

    Multidetector CT (MDCT) is an imaging technique that provides otherwise unobtainable information in the diagnostic work-up of patients presenting with acute abdominal pain. A correct working diagnosis depends essentially on understanding the individual patient's clinical data and laboratory findings. In haemodynamically stable patients with acute severe and generalized abdominal pain, MDCT is now the preferred imaging test and gives invaluable diagnostic information, also in unstable patients after stabilization. In this descriptive review, we focus our attention on acute, severe and generalized or undifferentiated non-traumatic abdominal pain. The main differential diagnoses are acute pancreatitis, gastrointestinal perforation, ruptured abdominal aneurysm and acute mesenteric ischaemia. We will provide radiologist readers with a technical guide to optimize MDCT imaging protocols and list the major CT signs essential to reach a correct diagnosis and guide the best treatment. PMID:26689097

  14. Abdominal pain and syndrome of inappropriate antidiuretic hormone secretion as clinical presentation of acute intermittent porphyria.

    PubMed

    Valle Feijóo, M L; Bermúdez Sanjurjo, J R; González Vázquez, L; Rey Martínez, M; de la Fuente Aguado, J

    2015-01-01

    Acute intermittent porphyria (AIP) is a rare condition characterized by abdominal pain and a wide range of nonspecific symptoms. We report the case of a woman with abdominal pain and syndrome of inappropriate antidiuretic hormone secretion (SIADH) as clinical presentation of AIP. The diagnosis was achieved through the etiologic study of the SIADH. PMID:25796467

  15. Individual Differences in Acute Pain-induced Endogenous Analgesia Predict Time to Resolution of Postoperative Pain in the Rat

    PubMed Central

    Peters, Christopher M.; Hayashida, Ken-ichiro; Suto, Takashi; Houle, Timothy T.; Aschenbrenner, Carol A.; Martin, Thomas J.; Eisenach, James C.

    2014-01-01

    Background Chronic post-surgical pain (CPSP), a significant public health problem, occurs in 10-50% of patients undergoing major surgery. Acute pain induces endogenous analgesia termed conditioned pain modulation (CPM), and the strength of CPM preoperatively predicts the likelihood of CPSP. The relationship between CPM and recovery from surgery has not been examined in preclinical models. Methods CPM was assessed in individual rats and correlated with each animal’s time course of recovery of hypersensitivity following partial spinal nerve ligation (pSNL). The role of descending noradrenergic pathways in the spinal cord to mechanisms of CPM and recovery was tested using idazoxan to block noradrenergic receptors or antidopamine β hydroxylase conjugated saporin (DβH-saporin) to ablate these pathways. Behavioral hypersensitivity, static weight bearing and spinal glial activation were measured after pSNL. Results The strength of CPM varied over two-fold between individuals and was directly correlated with the slope of recovery from hypersensitivity after surgery (P < 0.0001, r = 0.660). CPM induced release of norepinephrine in the spinal cord and was partially blocked by intrathecal idazoxan or DβH-saporin. DβH-saporin also slowed recovery and enhanced spinal glial activation following pSNL surgery. Ongoing activation of these pathways was critical to sustained recovery, since intrathecal DβH-saporin given 7 weeks after recovery reinstituted hypersensitivity, while having no effect in animals without previous surgery. Conclusions Collectively, these studies provide a clear back-translation from clinical observations of CPM and CPSP and suggest that the ability to engage ongoing descending endogenous noradrenergic signaling may be critical in determining time course of recovery from hypersensitivity after surgery. PMID:25581910

  16. Extended-release morphine sulfate in treatment of severe acute and chronic pain

    PubMed Central

    Balch, Robert J; Trescot, Andrea

    2010-01-01

    Morphine is the archetypal opioid analgesic. Because it is a short-acting opioid, its use has been limited to the management of acute pain. The development of extended-release formulations have resulted in the increased utilization of morphine in chronic pain conditions. This review documents the history of morphine use in pain treatment, and describes the metabolism, pharmacodynamics, formulations, and efficacy of the currently available extended-release morphine medications. PMID:21197323

  17. Effects of Parasternal Block on Acute and Chronic Pain in Patients Undergoing Coronary Artery Surgery.

    PubMed

    Doğan Bakı, Elif; Kavrut Ozturk, Nilgün; Ayoğlu, Rauf Umut; Emmiler, Mustafa; Karslı, Bilge; Uzel, Hanife

    2016-09-01

    Background Sternotomy causes considerable postoperative pain and postoperative pain management encompasses different analgesic regimens. In this study, we aimed to investigate the effect of peroperative parasternal block with levobupivacaine on acute and chronic pain after coronary artery bypass graft surgery. Materials and Methods A total of 81 patients undergoing coronary artery bypass graft surgery were included in this study. Patients were randomly allocated by opening an envelope to receive either parasternal block with pharmacologic analgesia (group P; before sternal wire placement: sternotomy and mediastinal tube sites were infiltrated with local anesthetics) or pharmacologic analgesia alone (group C) for postoperative pain relief. All patients received intravenous tramadol with patient-controlled analgesia at the end of the surgery. Demographic characteristics, vital signs, tramadol consumption, analgesic intake, and intensity of pain with a visual analogue scale were recorded for each patient. Six months after surgery, the patients' type of chronic pain was evaluated using the Leeds Assessment Neuropathic Symptoms and Signs pain scale questionnaire. Results Patients who received parasternal block experienced less pain and needed less opioid analgesic (125.75 ± 28.9 mg in group P vs 213.17 ± 61.25 mg in group C) for 24 hours postoperatively (P < .001). There was no significant difference in nociceptive and neuropathic pain between the groups. Conclusion Parasternal block had a benefical effect on the management of postoperative acute pain and decreased opioid consumption after surgery but had no significant effect in chronic post surgical pain. PMID:25900900

  18. Gender Differences in Acute and Chronic Pain in the Emergency Department: Results of the 2014 Academic Emergency Medicine Consensus Conference Pain Section

    PubMed Central

    Musey, Paul I.; Linnstaedt, Sarah D.; Platts-Mills, Timothy F.; Miner, James R.; Bortsov, Andrey V.; Safdar, Basmah; Bijur, Polly; Rosenau, Alex; Tsze, Daniel S.; Chang, Andrew K.; Dorai, Suprina; Engel, Kirsten; Feldman, James A.; Fusaro, Angela M.; Lee, David C.; Rosenberg, Mark; Keefe, Francis J.; Peak, David A.; Nam, Catherine S.; Patel, Roma G.; Fillingim, Roger B.; McLean, Samuel A.

    2015-01-01

    Pain is a leading public health problem in the United States, with an annual economic burden of more than $630 billion, and is one of the most common reasons that individuals seek emergency department (ED) care. There is a paucity of data regarding sex differences in the assessment and treatment of acute and chronic pain conditions in the ED. The Academic Emergency Medicine consensus conference convened in Dallas, Texas in May of 2014 to develop a research agenda to address this issue among others related to sex differences in the ED. Prior to the conference, experts and stakeholders from emergency medicine and the pain research field reviewed the current literature and identified eight candidate priority areas. At the conference, these eight areas were reviewed and all eight were ratified using a nominal group technique to build consensus. These priority areas were: 1) gender differences in the pharmacologic and non-pharmacologic interventions for pain, including differences in opioid tolerance, side effects, or misuse; 2) gender differences in pain severity perceptions, clinically meaningful differences in acute pain, and pain treatment preferences; 3) gender differences in pain outcomes of ED patients across the lifespan; 4) gender differences in the relationship between acute pain and acute psychological responses; 5) the influence of physician-patient gender differences and characteristics on the assessment and treatment of pain; 6) gender differences in the influence of acute stress and chronic stress on acute pain responses; 7) gender differences in biologic mechanisms and molecular pathways mediating acute pain in ED populations; and 8) gender differences in biologic mechanisms and molecular pathways mediating chronic pain development after trauma, stress, or acute illness exposure. These areas represent priority areas for future scientific inquiry, and gaining understanding in these will be essential to improving our understanding of sex and gender

  19. Gender differences in acute and chronic pain in the emergency department: results of the 2014 Academic Emergency Medicine consensus conference pain section.

    PubMed

    Musey, Paul I; Linnstaedt, Sarah D; Platts-Mills, Timothy F; Miner, James R; Bortsov, Andrey V; Safdar, Basmah; Bijur, Polly; Rosenau, Alex; Tsze, Daniel S; Chang, Andrew K; Dorai, Suprina; Engel, Kirsten G; Feldman, James A; Fusaro, Angela M; Lee, David C; Rosenberg, Mark; Keefe, Francis J; Peak, David A; Nam, Catherine S; Patel, Roma G; Fillingim, Roger B; McLean, Samuel A

    2014-12-01

    Pain is a leading public health problem in the United States, with an annual economic burden of more than $630 billion, and is one of the most common reasons that individuals seek emergency department (ED) care. There is a paucity of data regarding sex differences in the assessment and treatment of acute and chronic pain conditions in the ED. The Academic Emergency Medicine consensus conference convened in Dallas, Texas, in May 2014 to develop a research agenda to address this issue among others related to sex differences in the ED. Prior to the conference, experts and stakeholders from emergency medicine and the pain research field reviewed the current literature and identified eight candidate priority areas. At the conference, these eight areas were reviewed and all eight were ratified using a nominal group technique to build consensus. These priority areas were: 1) gender differences in the pharmacological and nonpharmacological interventions for pain, including differences in opioid tolerance, side effects, or misuse; 2) gender differences in pain severity perceptions, clinically meaningful differences in acute pain, and pain treatment preferences; 3) gender differences in pain outcomes of ED patients across the life span; 4) gender differences in the relationship between acute pain and acute psychological responses; 5) the influence of physician-patient gender differences and characteristics on the assessment and treatment of pain; 6) gender differences in the influence of acute stress and chronic stress on acute pain responses; 7) gender differences in biological mechanisms and molecular pathways mediating acute pain in ED populations; and 8) gender differences in biological mechanisms and molecular pathways mediating chronic pain development after trauma, stress, or acute illness exposure. These areas represent priority areas for future scientific inquiry, and gaining understanding in these will be essential to improving our understanding of sex and gender

  20. Reduced acute nociception and chronic pain in Shank2-/- mice.

    PubMed

    Ko, Hyoung-Gon; Oh, Seog-Bae; Zhuo, Min; Kaang, Bong-Kiun

    2016-01-01

    Autism spectrum disorder is a debilitating mental illness and social issue. Autism spectrum disorder patients suffer from social isolation, cognitive deficits, compulsive behavior, and sensory deficits, including hyposensitivity to pain. However, recent studies argued that autism spectrum disorder patients show physiological pain response and, in some cases, even extremely intense pain response to harmless stimulation. Recently, Shank gene family was reported as one of the genetic risk factors of autism spectrum disorder. Thus, in this study, we used Shank2(-) (/) (-) (Shank2 knock-out, KO) mice to investigate the controversial pain sensitivity issue and found that Shank2 KO mice showed reduced tactile perception and analgesia to chronic pain. PMID:27145803

  1. Acute Pain Speeds Skin Barrier Recovery in Healthy Men and Women

    PubMed Central

    Graham, Jennifer E.; Song, Sunmi; Engeland, Christopher G.

    2012-01-01

    Objective Psychological stress is known to impair skin barrier recovery, but little is known about the impact of pain on skin healing processes. Our primary goals were to examine the degree to which acute pain affects recovery from skin barrier disruption, and the potential mediating impact of cortisol and catecholamines. Methods Healthy non-smokers aged 18-43 (N=53, 65% women) underwent a 3-minute cold pressor pain stimulus to their foot. Tape-stripping of forearm skin occurred at two separate locations: before (site 1) and after (site 2) the pain stimulus. Transepidural water loss (TEWL) was assessed at baseline (pre-stripping), immediately post-stripping, and at 75 minutes to determine skin barrier recovery. Cortisol and catecholamine responses were obtained from multiple saliva and plasma samples, respectively. Results Contrary to expectations, greater pain was associated with faster skin barrier recovery, even after controlling for demographics, mood, anxiety, and other factors. Those who reported higher pain showed faster recovery at site 2 compared to a) individuals who experienced lower pain; and b) their own recovery at site 1. Greater increase in norepinephrine (but not in cortisol) was also associated with faster recovery at site 2, and mediated the impact of pain on recovery. Discussion Results bolster evidence that acute pain can affect immune-related processes. It is possible that acute pain may speed recovery from dermal abrasions, although pain is likely to impair recovery from more severe wounds. As pain is an important potential target for clinical intervention, further investigation of pain, stress, and healing processes is warranted. PMID:23148814

  2. Role of central arginine vasopressin receptors in the analgesic effect of CDP-choline on acute and neuropathic pain.

    PubMed

    Bagdas, Deniz; Yucel-Ozboluk, Hasret; Orhan, Fulya; Kanat, Ozkan; Isbil-Buyukcoskun, Naciye; Gurun, Mine S

    2013-12-01

    Recent studies have demonstrated that arginine vasopressin (AVP) plays a crucial role in pain modulation. In addition, our previous studies have proven that centrally administered cytidine-5'-diphosphate-choline (CDP-choline; citicoline) elicits an analgesic effect in different pain models in rats. Given that CDP-choline enhances central and peripheral vasopressin levels, the present study was designed to investigate the role of central AVP receptors in the analgesic effect of CDP-choline in acute and chronic constriction injury-induced neuropathic pain models. For this purpose, rats were pretreated intracerebroventricularly with the AVP V1 or AVP V2 receptor antagonist 15 min before intracerebroventricular injection of CDP-choline or saline, and pain threshold was determined using the Randall-Selitto test. AVP V1 and AVP V2 receptor antagonist blocked the CDP-choline-induced analgesic effect either in acute or neuropathic models of pain in rats. These results suggest, for the first time, that central AVP receptors are involved in the CDP-choline-elicited analgesic effect. PMID:24089014

  3. The role of experiential avoidance in acute pain tolerance: a laboratory test.

    PubMed

    Feldner, Matthew T; Hekmat, Hamid; Zvolensky, Michael J; Vowles, Kevin E; Secrist, Zachary; Leen-Feldner, Ellen W

    2006-06-01

    The present investigation examined the role of experiential avoidance in terms of acute pain tolerance and subsequent recovery. Seventy nonclinical participants completed the Acceptance and Action Questionnaire and underwent a well-established cold pressor task. Results indicated that individuals reporting higher levels of experiential avoidance had lower pain endurance and tolerance and recovered more slowly from this particular type of aversive event. Consistent with theoretical prediction, these findings suggest that experiential avoidance may play a role in tolerance of acute pain. PMID:15882839

  4. Integrated pain and palliative medicine model.

    PubMed

    Bhatnagar, Sushma; Gupta, Mayank

    2016-07-01

    Pain is one of the most common, distressing and feared symptom among cancer and other patients in need of palliative care. An estimated 25% of cancer patients and 25 million people die in pain each year. Effective pain and symptom management are the core elements of palliative care which aims at reducing suffering and improving quality of life (QOL) throughout the course of illness starting from diagnosis, in sync with curative treatments and at end of life. There is a prevailing shortage of manpower apt to deal with pain and providing cost-effective palliative care and with the rise of cancer, other chronic diseases and explosion of new life-prolonging therapeutic modalities, this 'Patient-pain and palliative physician' discrepancy is only going to increase, more so in developing countries. The need of the hour is to train all healthcare physicians and nurses especially those working in the field of chronic pain in principles of effective pain and symptom palliation, to integrate cancer pain and symptom management into existing pain management fellowships and to introduce a holistic pain and palliative care model at all levels of healthcare system. Simultaneously, of equal importance is to conduct research, evidence building and formulate policies and guidelines for meticulous symptom management among the diverse category of patients and diseases so as to have a personalized and individualistic approach to patient management. In this comprehensive review, we have pondered upon the need, advantages, barriers and recommendations to achieve ideal 'Integrated pain and palliative medicine' services, their equitable implementation and delivery to 'whomsoever in need of them'. PMID:27334349

  5. Translating Research into Practice Intervention Improves Management of Acute Pain in Older Hip Fracture Patients

    PubMed Central

    Titler, Marita G; Herr, Keela; Brooks, John M; Xie, Xian-Jin; Ardery, Gail; Schilling, Margo L; Marsh, J Lawrence; Everett, Linda Q; Clarke, William R

    2009-01-01

    Objective To test an interdisciplinary, multifaceted, translating research into practice (TRIP) intervention to (a) promote adoption, by physicians and nurses, of evidence-based (EB) acute pain management practices in hospitalized older adults, (b) decrease barriers to use of EB acute pain management practices, and (c) decrease pain intensity of older hospitalized adults. Study Design Experimental design with the hospital as the unit of randomization. Study Setting Twelve acute care hospitals in the Midwest. Data Sources (a) Medical records (MRs) of patients ≥65 years or older with a hip fracture admitted before and following implementation of the TRIP intervention and (b) physicians and nurses who care for those patients. Data Collection Data were abstracted from MRs and questions distributed to nurses and physicians. Principal Findings The Summative Index for Quality of Acute Pain Care (0–18 scale) was significantly higher for the experimental (10.1) than comparison group (8.4) at the end of the TRIP implementation phase. At the end of the TRIP implementation phase, patients in the experimental group had a lower mean pain intensity rating than those in the comparison group (p<.0001). Conclusion The TRIP intervention improved quality of acute pain management of older adults hospitalized with a hip fracture. PMID:19146568

  6. Salivary cortisol and psychological factors in women with chronic and acute oro-facial pain.

    PubMed

    Jasim, H; Louca, S; Christidis, N; Ernberg, M

    2014-02-01

    The aim of this study was to compare the salivary cortisol level, pain intensity and psychological factors between patients with chronic and acute oro-facial pain (OP) and pain-free subjects. Twenty-seven females with chronic OP (a diagnosis of myofascial pain according to the Research Diagnostic Criteria for Temporomandibular Disorders with at least 6 months duration), 24 females with acute OP (<10 days duration) and 27 pain-free females participated. Morning saliva was collected from all participants for analyses of the cortisol level. The pain intensity was assessed on a 0-10 numeric rating scale. The participants were evaluated by the Symptom Checklist 90-revised for levels of depression and somatisation, and the Perceived Stress Scale. The cortisol levels among the three patient groups were similar with no significant group differences. The median (interquartile range) current pain level did not differ between chronic and acute OP and was, respectively, 5 (4) and 5 (3). Patients with chronic OP showed significantly higher scores for depression, somatisation and perceived stress compared with patients with acute OP (Ps < 0.001), but there were no significant differences between acute OP and controls. To conclude, there were no differences in cortisol level between groups, despite significant higher levels of depression, somatisation and perceived stress in patients with chronic OP. This shows that psychological distress has a more important role in chronic than in acute OP. However, the relation between pain, adreno-cortical activity and psychological distress is complex and warrants further investigation. PMID:24313837

  7. Quality Assessment of Acute Inpatient Pain Management in an Academic Health Center.

    PubMed

    Lin, Richard J; Reid, M Carrington; Chused, Amy E; Evans, Arthur T

    2016-02-01

    The quality of acute inpatient pain management remains suboptimal and poorly understood. In this retrospective study, we analyze acute pain management practice in a large academic health center using several quality indicators. Not surprisingly, despite high rate of pain assessment, many patients still have frequent, prolonged, and unrelieved severe pain episodes. Upon examination of naloxone administration, we identify potential inappropriate opioid prescription practices such as the use of wrong opioids in hepatic and renal failure and simultaneous use of multiple short-acting opioids. Most importantly, we find that chronic opioid users appear to suffer the most in terms of undertreatment of pain as well as opioid overdose, highlighting the urgent need to target this underserved population of patients. PMID:25106418

  8. Graduated compression stockings to treat acute leg pain associated with proximal DVT. A randomised controlled trial.

    PubMed

    Kahn, S R; Shapiro, S; Ducruet, T; Wells, P S; Rodger, M A; Kovacs, M J; Anderson, D; Tagalakis, V; Morrison, D R; Solymoss, S; Miron, M-J; Yeo, E; Smith, R; Schulman, S; Kassis, J; Kearon, C; Chagnon, I; Wong, T; Demers, C; Hanmiah, R; Kaatz, S; Selby, R; Rathbun, S; Desmarais, S; Opatrny, L; Ortel, T L; Galanaud, J-P; Ginsberg, J S

    2014-12-01

    Acute deep venous thrombosis (DVT) causes leg pain. Elastic compression stockings (ECS) have potential to relieve DVT-related leg pain by diminishing the diameter of distended veins and increasing venous blood flow. It was our objective to determine whether ECS reduce leg pain in patients with acute DVT. We performed a secondary analysis of the SOX Trial, a multicentre randomised placebo controlled trial of active ECS versus placebo ECS to prevent the post-thrombotic syndrome.The study was performed in 24 hospital centres in Canada and the U.S. and included 803 patients with a first episode of acute proximal DVT. Patients were randomised to receive active ECS (knee length, 30-40 mm Hg graduated pressure) or placebo ECS (manufactured to look identical to active ECS, but lacking therapeutic compression). Study outcome was leg pain severity assessed on an 11-point numerical pain rating scale (0, no pain; 10, worst possible pain) at baseline, 14, 30 and 60 days after randomisation. Mean age was 55 years and 60% were male. In active ECS patients (n=409), mean (SD) pain severity at baseline and at 60 days were 5.18 (3.29) and 1.39 (2.19), respectively, and in placebo ECS patients (n=394) were 5.38 (3.29) and 1.13 (1.86), respectively. There were no significant differences in pain scores between groups at any assessment point, and no evidence for subgroup interaction by age, sex or anatomical extent of DVT. Results were similar in an analysis restricted to patients who reported wearing stockings every day. In conclusion, ECS do not reduce leg pain in patients with acute proximal DVT. PMID:25183442

  9. A human experimental model of episodic pain.

    PubMed

    Petrini, Laura; Hennings, Kristian; Li, Xi; Negro, Francesco; Arendt-Nielsen, Lars

    2014-12-01

    An experimental model of daily episodic pain was developed to investigate peripheral sensitization and cortical reorganization in healthy individuals. Two experiments (A and B) were conducted. Experiments A and B consisted of one and five consecutive days, respectively, in which the participants were subjected to 45 min of intense painful cutaneous electrical stimulation (episodic pain session), using a stimulus paradigm that in animals has been shown to induce long-term potentiation. These electrical stimulations produced a verbal pain rating of approximately 85 on a 0-100 verbal rating scale (VRS). Physiological (blood flow and axon flare reflex), psychophysical (perception threshold and verbal pain ratings) and electrophysiological (128 channels recorded somatosensory evoked potential (SEP)) measurements were recorded. The stimulation evoked a visible axon flare reflex and caused significantly increased cutaneous blood flow around the site of the stimulation. Axon flare reflex and blood flow reached a plateau on day one in all the subjects and no significant changes between the days were observed. The results showed that the effect of the electrical stimulations changed over the five days; pain potentiation was induced on the first day (significant increase in the verbal pain ratings during the 45 min stimulation) but not on any of the subsequent days. After five days of subsequent pain induction, the global field power showed a significant reduction in P2 amplitude in the late stage (200-370 ms, in the central-parietal area). In conclusion, the results suggest that in healthy individuals this model of episodic pain produces a rapid adaptation after day one and that generates significant SEP changes at day five. PMID:25128903

  10. Treatment of mild to moderate pain of acute soft tissue injury: diflunisal vs acetaminophen with codeine.

    PubMed

    Muncie, H L; King, D E; DeForge, B

    1986-08-01

    Acute soft tissue injuries create pain and limitation of function. Treatment requires analgesia and time for full recovery. Acetaminophen with codeine (650 mg plus 60 mg, respectively, every 4 to 6 hours) is used frequently as the analgesic of choice. Diflunisal (1,000 mg initially then 500 mg twice a day) vs acetaminophen with codeine was prospectively studied in the treatment of acute mild to moderate pain from soft tissue injuries. Thirty-five patients with acute strains, sprains, or low back pain were randomized to treatment (17 acetaminophen with codeine vs 18 diflunisal). Both groups were similar in the amount of pain and type of injury at initiation of therapy. Patient pain rating went from 3.3 +/- 0.6 to 1.6 +/- 1.5 for acetaminophen with codeine and from 3.3 +/- 0.6 to 1.3 +/- 1.1 for diflunisal. However, 65 percent of acetaminophen with codeine patients experienced side effects, with 35 percent of these patients stopping the medication because of intolerable side effects. In the diflunisal group, 28 percent of the patients experienced side effects and 5 percent had to stop the medication early. Diflunisal was found to be an effective analgesic in mild to moderate pain of acute soft tissue injuries, and caused fewer and more tolerable side effects than did acetaminophen with codeine. PMID:2942630

  11. Are prognostic indicators for poor outcome different for acute and chronic low back pain consulters in primary care?

    PubMed

    Grotle, Margreth; Foster, Nadine E; Dunn, Kate M; Croft, Peter

    2010-12-01

    Few studies have investigated whether prognostic indicators, which contribute to the transition from acute to chronic low back pain (LBP), are also those which contribute to continuing persistence of chronic LBP. We compared the contribution of physical, psychological and social indicators to predicting disability after one year between consulters with LBP of less than 3 months duration and more than 3 months duration. Data from two large prospective cohort studies of consecutive patients consulting with LBP in general practices were merged, providing complete data for 258 cases with acute/subacute LBP and 668 cases with chronic LBP at 12 months follow-up. There were significant differences between the two LBP groups in baseline characteristics and clinical course of disability, assessed by Roland Morris Disability Questionnaire, during the year of follow-up. Adjusted associations between potential prognostic indicators and disability at 12months were carried out in the two LBP subgroups. The final multivariable regression models showed that being non-employed, having widespread pain, a high level of Chronic Pain Grade, and catastrophising were the strongest prognostic indicators for disability at 12 months in both LBP groups. Fear of pain was significantly associated with disability in chronic LBP. Importantly, beyond baseline disability, the effect size of the other prognostic indicators for poor outcome was rather low. These findings must continue to challenge researchers to identify useful early predictors of outcome in persons with disabling back pain, as screening and targeted treatment approaches are dependent upon prognostic indicators with clinical significance. PMID:20932646

  12. CLINICAL ASPECTS OF ACUTE POST-OPERATIVE PAIN MANAGEMENT & ITS ASSESSMENT

    PubMed Central

    Gupta, Anuj; Kaur, Kirtipal; Sharma, Sheeshpal; Goyal, Shubham; Arora, Saahil; Murthy, R.S.R

    2010-01-01

    Management of postoperative pain relieve suffering and leads to earlier mobilization, shortened hospital stay, reduced hospital costs, and increased patient satisfaction. An effective postoperative management is not a standardized regime rather is tailored to the needs of the individual patient, taking into account medical, psychological, and physical condition; age; level of fear or anxiety; surgical procedure; personal preference; and response to therapeutic agents given. The major goal in the management of postoperative pain is to minimize the dose of medications to lessen side effects & provide adequate analgesia. Postoperative pain is still under managed due to obstacles in implementation of Acute Pain Services due to insufficient education, fear of complications associated with available analgesic drugs, poor pain assessment and inadequate staff. This review reflects the clinical aspects of postoperative pain & its assessment & management with an emphasis on research for new analgesic molecules & delivery system. PMID:22247838

  13. Systematic reviews of bed rest and advice to stay active for acute low back pain.

    PubMed Central

    Waddell, G; Feder, G; Lewis, M

    1997-01-01

    BACKGROUND: In the United Kingdom (UK), 9% of adults consult their doctor annually with back pain. The treatment recommendations are based on orthopaedic teaching, but the current management is causing increasing dissatisfaction. Many general practitioners (GPs) are confused about what constitutes effective advice. AIM: To review all randomized controlled trials of bed rest and of medical advice to stay active for acute back pain. METHOD: A systematic review based on a search of MEDLINE and EMBASE from 1966 to April 1996 with complete citation tracking for randomized controlled trials of bed rest or medical advice to stay active and continue ordinary daily activities. The inclusion criteria were: primary care setting, patients with low back pain of up to 3 months duration, and patient-centred outcomes (rate of recovery from the acute attack, relief of pain, restoration of function, satisfaction with treatment, days off work and return to work, development of chronic pain and disability, recurrent attacks, and further health care use). RESULTS: Ten trials of bed rest and eight trials of advice to stay active were identified. Consistent findings showed that bed rest is not an effective treatment for acute low back pain but may delay recovery. Advice to stay active and to continue ordinary activities results in a faster return to work, less chronic disability, and fewer recurrent problems. CONCLUSION: A simple but fundamental change from the traditional prescription of bed rest to positive advice about staying active could improve clinical outcomes and reduce the personal and social impact of back pain. PMID:9474831

  14. A systematic review of early prognostic factors for persistent pain following acute orthopedic trauma

    PubMed Central

    Clay, Fiona J; Watson, Wendy L; Newstead, Stuart V; McClure, Roderick J

    2012-01-01

    BACKGROUND: Acute orthopedic trauma contributes substantially to the global burden of disease. OBJECTIVES: The present systematic review aimed to summarize the current knowledge concerning prognostic factors for the presence of persistent pain, pain severity and pain-related disability following acute orthopedic trauma involving a spectrum of pathologies to working-age adults. METHODS: The Ovid MEDLINE and EMBASE databases were searched for level II prognostic studies published between January 1996 and October 2010. Studies that were longitudinal and reported results with multivariate analyses appropriate for prognostic studies were included. Studies that addressed two specific injury types that have been the subject of previous reviews, namely, injuries to the spinal column and amputations, were excluded. RESULTS: The searches yielded 992 studies; 10 studies met the inclusion criteria and were rated for methodological quality. Seventeen factors were considered in more than one cohort. There was strong evidence supporting the association of female sex, older age, high pain intensity, preinjury anxiety or depression, and fewer years of education with persistent pain outcomes. There was moderate evidence supporting the association between postinjury depression or anxiety with persistent pain, and that injury severity was not a risk factor for ongoing pain. CONCLUSION: Many individuals experience persistent pain following acute trauma. Due to the lack of studies, the use of different constructs to measure the same factor and the methodological limitations associated with many of the studies, the present review was only able to reliably identify a limited set of factors that predicted persistent pain. Recommendations for the conduct of future methodologically rigorous studies of persistent pain are provided. PMID:22518366

  15. The effect of an acute pain service on nurses' knowledge and beliefs about post-operative pain.

    PubMed

    Mackintosh, C; Bowles, S

    2000-01-01

    The management of post-operative pain has been an area of concern for many years, with many studies focusing on the knowledge and beliefs of nurses working in this area. Following the report of the Royal College of Surgeons & College of Anaesthetists (1990) in the UK, there has been a rapid expansion in the development of Acute Pain Services (APS) in an attempt to counter these concerns. This descriptive study considers the possible impact the introduction of an APS had on the knowledge and beliefs of nurses working in the surgical area. A closed-answer questionnaire was used to replicate an earlier study (Mackintosh, 1994) which took place before the introduction of the APS. Findings demonstrate a consistent but mainly statistically non-significant trend in all areas towards an improved knowledge base and more appropriate beliefs about pain. PMID:11022500

  16. Reduced Maximal Force during Acute Anterior Knee Pain Is Associated with Deficits in Voluntary Muscle Activation

    PubMed Central

    Salomoni, Sauro; Tucker, Kylie; Hug, François; McPhee, Megan; Hodges, Paul

    2016-01-01

    Although maximal voluntary contraction (MVC) force is reduced during pain, studies using interpolated twitch show no consistent reduction of voluntary muscle drive. The present study aimed to test if the reduction in MVC force during acute experimental pain could be explained by increased activation of antagonist muscles, weak voluntary activation at baseline, or changes in force direction. Twenty-two healthy volunteers performed maximal voluntary isometric knee extensions before, during, and after the effects of hypertonic (pain) and isotonic (control) saline injections into the infrapatellar fat pad. The MVC force, voluntary activation, electromyographic (EMG) activity of agonist, antagonist, and auxiliary (hip) muscles, and pain cognition and anxiety scores were recorded. MVC force was 9.3% lower during pain than baseline (p < 0.001), but there was no systematic change in voluntary activation. Reduced MVC force during pain was variable between participants (SD: 14%), and was correlated with reduced voluntary activation (r = 0.90), baseline voluntary activation (r = − 0.62), and reduced EMG amplitude of agonist and antagonist muscles (all r > 0.52), but not with changes in force direction, pain or anxiety scores. Hence, reduced MVC force during acute pain was mainly explained by deficits in maximal voluntary drive. PMID:27559737

  17. Streptococcus viridans osteomyelitis with endocarditis presenting as acute onset lower back pain.

    PubMed

    Buchman, A L

    1990-01-01

    An elderly male with a history of diabetes mellitus and a recent dental procedure presented to the emergency department with acute lumbosacral pain and low grade fever. Computerized tomography (CT scan) and magnetic resonance imaging (MRI) yielded a presumptive diagnosis of pyogenic vertebral osteomyelitis. A diagnosis of viridans Streptococcus vertebral osteomyelitis was confirmed by gallium scanning and blood culture. The literature has emphasized the occurrence of pyogenic vertebral osteomyelitis as a chronic process. A review suggests that viridans Streptococci, although an uncommon cause of this disorder, is usually associated with back pain of more acute onset. It is therefore recommended that pyogenic vertebral osteomyelitis be considered in any patient presenting to the emergency department with the acute onset of lower back pain, fever, leukocytosis and an elevated erythrocyte sedimentation rate. PMID:2142706

  18. A rare cause of acute abdominal pain: Herlyn-Werner-Wunderlich syndrome.

    PubMed

    Aydin, Ramazan; Ozdemir, Ayse Zehra; Ozturk, Bahadir; Bilgici, Meltem Ceyhan; Tosun, Migraci

    2014-01-01

    Herlyn-Werner-Wunderlich (HWW) syndrome is a rare müllerian duct anomaly with uterus didelphys, unilateral obstructed hemivagina, and ipsilateral renal agenesis. Patients with this syndrome generally present after menarche with pelvic pain and mass and, rarely, primary infertility in later years. Strong suspicion and knowledge of this syndrome are mandatory for an accurate diagnosis. A 14-year-old female patient presented with acute retention of urine and abdominopelvic pain. Her condition was diagnosed with the use ultrasonography and magnetic resonance imaging as a case of HWW syndrome. She was treated with vaginal hemiseptal resection. The HWW syndrome should be considered among the differential diagnoses in girls with renal anomalies presenting with pelvic mass, symptoms of acute abdominal pain, and acute urinary retention. PMID:24378860

  19. Role of the Cannabinoid System in Pain Control and Therapeutic Implications for the Management of Acute and Chronic Pain Episodes

    PubMed Central

    Manzanares, J; Julian, MD; Carrascosa, A

    2006-01-01

    Cannabis extracts and synthetic cannabinoids are still widely considered illegal substances. Preclinical and clinical studies have suggested that they may result useful to treat diverse diseases, including those related with acute or chronic pain. The discovery of cannabinoid receptors, their endogenous ligands, and the machinery for the synthesis, transport, and degradation of these retrograde messengers, has equipped us with neurochemical tools for novel drug design. Agonist-activated cannabinoid receptors, modulate nociceptive thresholds, inhibit release of pro-inflammatory molecules, and display synergistic effects with other systems that influence analgesia, especially the endogenous opioid system. Cannabinoid receptor agonists have shown therapeutic value against inflammatory and neuropathic pains, conditions that are often refractory to therapy. Although the psychoactive effects of these substances have limited clinical progress to study cannabinoid actions in pain mechanisms, preclinical research is progressing rapidly. For example, CB1mediated suppression of mast cell activation responses, CB2-mediated indirect stimulation of opioid receptors located in primary afferent pathways, and the discovery of inhibitors for either the transporters or the enzymes degrading endocannabinoids, are recent findings that suggest new therapeutic approaches to avoid central nervous system side effects. In this review, we will examine promising indications of cannabinoid receptor agonists to alleviate acute and chronic pain episodes. Recently, Cannabis sativa extracts, containing known doses of tetrahydrocannabinol and cannabidiol, have granted approval in Canada for the relief of neuropathic pain in multiple sclerosis. Further double-blind placebo-controlled clinical trials are needed to evaluate the potential therapeutic effectiveness of various cannabinoid agonists-based medications for controlling different types of pain. PMID:18615144

  20. Analyzing musculoskeletal neck pain, measured as present pain and periods of pain, with three different regression models: a cohort study

    PubMed Central

    Grimby-Ekman, Anna; Andersson, Eva M; Hagberg, Mats

    2009-01-01

    Background In the literature there are discussions on the choice of outcome and the need for more longitudinal studies of musculoskeletal disorders. The general aim of this longitudinal study was to analyze musculoskeletal neck pain, in a group of young adults. Specific aims were to determine whether psychosocial factors, computer use, high work/study demands, and lifestyle are long-term or short-term factors for musculoskeletal neck pain, and whether these factors are important for developing or ongoing musculoskeletal neck pain. Methods Three regression models were used to analyze the different outcomes. Pain at present was analyzed with a marginal logistic model, for number of years with pain a Poisson regression model was used and for developing and ongoing pain a logistic model was used. Presented results are odds ratios and proportion ratios (logistic models) and rate ratios (Poisson model). The material consisted of web-based questionnaires answered by 1204 Swedish university students from a prospective cohort recruited in 2002. Results Perceived stress was a risk factor for pain at present (PR = 1.6), for developing pain (PR = 1.7) and for number of years with pain (RR = 1.3). High work/study demands was associated with pain at present (PR = 1.6); and with number of years with pain when the demands negatively affect home life (RR = 1.3). Computer use pattern (number of times/week with a computer session ≥ 4 h, without break) was a risk factor for developing pain (PR = 1.7), but also associated with pain at present (PR = 1.4) and number of years with pain (RR = 1.2). Among life style factors smoking (PR = 1.8) was found to be associated to pain at present. The difference between men and women in prevalence of musculoskeletal pain was confirmed in this study. It was smallest for the outcome ongoing pain (PR = 1.4) compared to pain at present (PR = 2.4) and developing pain (PR = 2.5). Conclusion By using different regression models different aspects of neck

  1. Pain Documentation: Validation of a Reference Model.

    PubMed

    Gesner, Emily; Collins, Sarah A; Rocha, Roberto

    2015-01-01

    Over the last decade, interoperability of the Electronic Health Record (EHR) is becoming more of a reality. However, inconsistencies in documentation such as pain are considered a barrier to obtaining this goal. In order to be able to remedy this issue, it is necessary to validate reference models that have been created based upon requirements defined by Health Level 7 (HL7), Logical Names and Codes (LOINC) and the Intermountain Clinical Element Model using external published sources and guidelines. Using pain as an example of complex and inconsistent documentation, it was found that the reference model based upon these standards is valid because the data elements identified are broad and can meet the needs of each sub-domain within the primary domain of pain. PMID:26262163

  2. Single dose oral piroxicam for acute postoperative pain

    PubMed Central

    Moore, R Andrew; Edwards, Jayne; Loke, Yoon; Derry, Sheena; McQuay, Henry J

    2014-01-01

    Background This is an updated version of the original Cochrane review published in Issue 2, 2000. Piroxicam is a non-steroidal anti-inflammatory drug (NSAID) with analgesic properties, and is used mainly for treating rheumatic disorders. Some drugs have been directly compared against each other within a trial setting to determine their relative efficacies, whereas other have not. It is possible, however, to compare analgesics indirectly by examining the effectiveness of each drug against placebo when used in similar clinical situations. Objectives To determine the analgesic efficacy and adverse effects of single-dose piroxicam compared with placebo in moderate to severe postoperative pain. To compare the effects of piroxicam with other analgesics. Search methods Published studies were identified from systematic searching of MEDLINE, Biological Abstracts, EMBASE, CENTRAL and the Oxford Pain Relief Database in December 2007. Additional studies were identified from the reference lists of retrieved reports. Selection criteria The following inclusion criteria were used: full journal publication, randomised placebo controlled trial, double-blind design, adult participants, postoperative pain of moderate to severe intensity at the baseline assessment, postoperative administration of oral or intramuscular piroxicam. Data collection and analysis Summed pain intensity and pain relief data were extracted and converted into dichotomous information to yield the number of participants obtaining at least 50% pain relief. This was used to calculate estimates of relative benefit and number-needed-to-treat-to-benefit (NNT) for one participant to obtain at least 50% pain relief. Information was collected on adverse effects and estimates of relative risk and number-needed-to-treat-to-harm (NNH) were calculated. Main results In this update no further studies were found. The original search identified three studies (141 participants) which compared oral piroxicam 20 mg with placebo and

  3. Wilderness Medical Society practice guidelines for the treatment of acute pain in remote environments: 2014 update.

    PubMed

    Russell, Katie W; Scaife, Courtney L; Weber, David C; Windsor, Jeremy S; Wheeler, Albert R; Smith, William R; Wedmore, Ian; McIntosh, Scott E; Lieberman, James R

    2014-12-01

    The Wilderness Medical Society convened an expert panel to develop evidence-based guidelines for the management of pain in austere environments. Recommendations are graded on the basis of the quality of supporting evidence as defined by criteria put forth by the American College of Chest Physicians. This is an updated version of the original WMS Practice Guidelines for the Treatment of Acute Pain in Remote Environments published in Wilderness & Environmental Medicine 2014;25(1):41-49. PMID:25498266

  4. Dual Alleviation of Acute and Neuropathic Pain by Fused Opioid Agonist-Neurokinin 1 Antagonist Peptidomimetics.

    PubMed

    Betti, Cecilia; Starnowska, Joanna; Mika, Joanna; Dyniewicz, Jolanta; Frankiewicz, Lukasz; Novoa, Alexandre; Bochynska, Marta; Keresztes, Attila; Kosson, Piotr; Makuch, Wioletta; Van Duppen, Joost; Chung, Nga N; Vanden Broeck, Jozef; Lipkowski, Andrzej W; Schiller, Peter W; Janssens, Frans; Ceusters, Marc; Sommen, François; Meert, Theo; Przewlocka, Barbara; Tourwé, Dirk; Ballet, Steven

    2015-12-10

    Herein, the synthesis and biological evaluation of dual opioid agonists-neurokinin 1 receptor (NK1R) antagonists is described. In these multitarget ligands, the two pharmacophores do not overlap, and this allowed maintaining high NK1R affinity and antagonist potency in compounds 12 and 13. Although the fusion of the two ligands resulted in slightly diminished opioid agonism at the μ- and δ-opioid receptors (MOR and DOR, respectively), as compared to the opioid parent peptide, balanced MOR/DOR activities were obtained. Compared to morphine, compounds 12 and 13 produced more potent antinociceptive effects in both acute (tail-flick) and neuropathic pain models (von Frey and cold plate). Similarly to morphine, analgesic tolerance developed after repetitive administration of these compounds. To our delight, compound 12 did not produce cross-tolerance with morphine and high antihyperalgesic and antiallodynic effects could be reinstated after chronic administration of each of the two compounds. PMID:26713106

  5. Magnetic resonance imaging of acute abdominal and pelvic pain in pregnancy.

    PubMed

    Furey, Elizabeth A; Bailey, April A; Pedrosa, Ivan

    2014-08-01

    Evaluation of acute abdominal and pelvic pain in pregnancy presents a diagnostic challenge for clinicians and radiologists alike. The differential diagnosis includes obstetric and nonobstetric conditions unique to pregnancy, in addition to causes of acute abdominal and pelvic pain unrelated to the pregnancy. The clinical presentation and course of disease may be altered in pregnancy, and several pathologies are exacerbated by pregnancy. Discriminating clinical features in the diagnosis of abdominal and pelvic pain are often confounded by expected anatomic and physiologic changes in pregnancy. Moreover, while diagnostic pathways may be altered in pregnancy, the necessity for a timely and accurate diagnosis must be underscored, as delay in treatment may result in an undesirable increase in morbidity and/or mortality for both the patient and fetus. Advances in magnetic resonance imaging (MRI) through faster acquisition and motion-insensitive techniques, coupled with increased awareness and education regarding the value of MRI in diagnosing a wide range of pathology, have established MRI as a valuable strategy in the investigation of acute abdominal and pelvic pain in the pregnant patient. This review presents a practical approach to common obstetric and nonobstetric causes of acute abdominal and pelvic pain during pregnancy, as well as safety considerations for performing MRI in this patient population. PMID:25099561

  6. Flank pain and acute renal failure after binge drinking: a growing concern?

    PubMed

    Calviño, Jesús; Bravo, Juan; Millán, Beatriz; Gonzalez-Tabares, Lourdes

    2013-01-01

    We describe two cases of acute renal failure (ARF) after heavy alcohol intake. Remarkable features included a few days latency period after binge drinking, acute flank pain resembling pyelonephritis, lack of rhabdomyolysis or liver injury, and concomitant intake of non-steroidal anti-inflammatory drugs (NSAIDs). Renal function improved with conservative treatment, and despite NSAIDs use, hyperkalemia was not clinically significant. Since binge drinking is common in the Western population, early recognition of this syndrome may be helpful when examining a patient with flank pain and ARF of unclear etiology. PMID:23477481

  7. Clinical profile of non-traumatic acute abdominal pain presenting to an adult emergency department

    PubMed Central

    Chanana, Lakshay; Jegaraj, Moses A. K.; Kalyaniwala, Kimmin; Yadav, Bijesh; Abilash, Kundavaram

    2015-01-01

    Background: Abdominal pain is one of the most common reasons for presenting to the emergency depatment (ED) and the etiology is varied. Materials and Methods: This prospective observational study was conducted in a large ED of a tertiary care center in India. All patients older than 15 years and presenting with non-traumatic abdominal pain to the ED from May 2012 to October 2012 were recruited and the demographic characteristics, diagnosis and outcome were analyzed. Results: The study cohort included 264 patients over a 6 month period. More than half (55.6%) were aged between 15 and 40 years. There was a male predominance (56.8%). Majority of the patients (76.9%) presented with abdominal pain of less than 72 hour duration. The pain was sudden in onset in 54.9% of patients. Dull type was the most common character of pain (36%) followed by colicky type (22.3%). The most common site of pain was the lower abdomen (45.8%). Upper abdominal pain was seen in 26.9% and the pain was generalized in 27.3% of patients. The common causes were uretericcolic (16.3%), urinary tract infection (12.5%), acute pancreatitis (11%), acute appendicitis (10.6%) and acute gastritis (8%). More than half (51.9%) discharged from ED and 37% of cases were managed by the emergency physicians. Surgical intervention was required in 25.8% of patients. The mortality rate was 2.3%. Conclusions: Abdominal pain is a common ED symptom and clinicians must consider multiple diagnoses, especially those that require immediate intervention to limit morbidity and mortality. PMID:26288785

  8. Genetic Polymorphisms in the Dopamine Receptor 2 Predict Acute Pain Severity after Motor Vehicle Collision

    PubMed Central

    Qadri, Yawar J.; Bortsov, Andrey V.; Orrey, Danielle C.; Swor, Robert A.; Peak, David A.; Jones, Jeffrey S.; Rathlev, Niels K.; Lee, David C.; Domeier, Robert M.; Hendry, Phyllis L.; Mclean, Samuel A.

    2014-01-01

    Objectives: Dopaminergic signaling is implicated in nociceptive pathways. These effects are mediated largely through dopamine receptors and modulated in part by dopamine transporters. This study tests the hypothesis that genetic variants in the genes encoding dopamine receptor 2 (DRD2) and the dopamine active transporter (SLC6A3) influence acute pain severity after motor vehicle collision (MVC). Methods: European Americans presenting to the emergency department (ED) after MVC were recruited. Overall pain intensity in ED was assessed using a 0-10 numeric rating scale. DNA was extracted from blood samples and genotyping of single nucleotide polymorphisms (SNPs) in the DRD2 and SLC6A3 gene was performed. Results: A total of 948 patients completed evaluation. After correction for multiple comparisons, SNP rs6276 at DRD2 showed significant association with pain scores, with individuals with the A/A genotype reporting lower mean pain scores (5.3, 95% CI 5.1 to 5.5) than those with A/G (5.9, 95% CI 5.6 to 6.1) or G/G (5.7, 95%CI 5.2 to 6.2) genotypes (p=0.0027). Secondary analyses revealed an interaction between sex and DRD2 SNPs rs4586205 and rs4648318 on pain scores: females with two minor alleles had increased pain intensity, whereas males with two minor alleles had less pain than individuals with a major allele (interaction p=0.0019). Discussion: Genetic variants in DRD2 are associated with acute pain after a traumatic stressful event. These results suggest that dopaminergic agents may be useful for the treatment of individuals with acute post-traumatic pain as part of a multimodal opioid-sparing analgesic regimen. PMID:25370144

  9. Sensitization to Acute Procedural Pain in Pediatric Sickle Cell Disease: Modulation by Painful Vaso-occlusive Episodes, Age, and Endothelin-1

    PubMed Central

    Schlenz, Alyssa M.; McClellan, Catherine B.; Mark, Teresa R.M.; McKelvy, Alvin D.; Puffer, Eve; Roberts, Carla W.; Sweitzer, Sarah M.; Schatz, Jeffrey C.

    2012-01-01

    The impact of pain early in life is a salient issue for sickle cell disease (SCD), a genetic condition characterized by painful vaso-occlusive episodes (VOEs) that can begin in the first year of life and persist into adulthood. This study examined the effects of age and pain history (age of onset and frequency of recent VOEs) on acute procedural pain in children with SCD. Endothelin-1, a vaso-active peptide released during VOEs and acute tissue injury, and its precursor, Big Endothelin, were explored as markers of pain sensitization and vaso-occlusion. Sixty-one children with SCD (ages 2 to 18) underwent venipuncture at routine health visits. Procedural pain was assessed via child- and caregiver-reports and observational distress. Pain history was assessed using retrospective chart review. Three primary results were found: 1) younger age was associated with greater procedural pain across pain outcomes, 2) higher frequency of VOEs was associated with greater procedural pain based on observational distress (regardless of age), and 3) age was found to moderate the relationship between VOEs and procedural pain for child-reported pain and observational distress for children five years of age and older. Associations between the endothelin variables and pain prior to venipuncture were also observed. PMID:22633685

  10. Abdominal migraine in the differential diagnosis of acute abdominal pain.

    PubMed

    Cervellin, Gianfranco; Lippi, Giuseppe

    2015-06-01

    Although traditionally regarded as a specific pediatric disease, abdominal migraine may also be observed in adults. Unfortunately, however, this condition is frequently overlooked in the differential diagnosis of abdominal pain in the emergency department (ED). A 30-year-old woman presented to our ED complaining of abdominal pain and vomiting, lasting for 12 hours. The pain was periumbilical, continuous, and not associated with fever or diarrhea. The physical examination and the results of conventional blood tests were normal. The patient was treated with intravenous ketoprofen, metoclopramide, and ranitidine, obtaining a prompt relief of symptoms. She had a history of similar episodes in the last 15 years, with several ED visits, blood test examinations, ultrasonography of the abdomen, and upper gastrointestinal endoscopies. Celiac disease, porphyry, sickle cell disease, and inflammatory bowel disease were all excluded. In July 2012, she became pregnant, and she delivered a healthy baby on April 2013. Until November 2014, she has remained asymptomatic. Based on the clinical characteristics of the abdominal pain episodes, the exclusion of any alternative diagnosis, and the relief of symptoms during and after pregnancy, a final diagnosis of abdominal migraine could be established. A skilled emergency physician should always consider abdominal migraine in the differential diagnosis of patients admitted to the ED with abdominal pain, especially when the attacks are recurrent and no alternative diagnosis can be clearly established. PMID:25616589

  11. Evaluation and management of acute abdominal pain in the emergency department

    PubMed Central

    Macaluso, Christopher R; McNamara, Robert M

    2012-01-01

    Evaluation of the emergency department patient with acute abdominal pain is sometimes difficult. Various factors can obscure the presentation, delaying or preventing the correct diagnosis, with subsequent adverse patient outcomes. Clinicians must consider multiple diagnoses, especially those life-threatening conditions that require timely intervention to limit morbidity and mortality. This article will review general information on abdominal pain and discuss the clinical approach by review of the history and the physical examination. Additionally, this article will discuss the approach to unstable patients with abdominal pain. PMID:23055768

  12. Pain Relief for Acute Urolithiasis: The Case for Non-Steroidal Anti-Inflammatory Drugs.

    PubMed

    Steinberg, Peter L; Chang, Steven L

    2016-07-01

    Pain from renal colic is often severe and incapacitating. Many patients require emergent hospitalization and aggressive analgesia to relieve such discomfort. For many years, the optimal analgesic strategy has been sought to manage such severe pain. One of the mainstays of therapy for acute renal colic is with non-steroidal anti-inflammatory drugs (NSAIDs). This paper reviews the mechanism by which NSAIDs allow pain relief in renal colic, the evidence for their use in this condition, and the use of NSAIDs combined with other agents in renal colic. PMID:27286841

  13. Editor's Choice-Chest pain relief in patients with acute myocardial infarction.

    PubMed

    Parodi, Guido

    2016-06-01

    Chest pain is the prevalent symptom at presentation in patients with acute myocardial infarction (AMI). Despite the complete absence of rigorous studies designed to assess the impact of morphine administration in patients with AMI, clinical practice guidelines strongly recommend morphine for analgesia. However, when using morphine to relieve chest pain in AMI patients, physicians must be aware that hypotension, respiratory depression, vomiting, and delayed onset of action of antiplatelet agents are potential unwanted side effects of the drug. The purpose of this report is to review morphine's clinical and side effects and to propose strategies able to reduce chest pain in AMI patients. PMID:25904757

  14. Treatment of an elderly patient with acute abdominal pain with traditional Korean medicine.

    PubMed

    Son, Chang-Gue

    2014-10-01

    Abdominal pain in elderly patients leads to challenge due to diagnostic difficulty and high incidence of complications. This case report presents an elderly patient with acute and severe abdominal pain, who did not respond to Western treatments. The patient was diagnosed to have abdominal pain by Yang deficiency of spleen (脾陽虛). Acupuncture (mainly at LI4 and LR3), indirect moxibustion (CV4 and CV8), and a herbal drug [DaehwangBuja-Tang (大黃附子湯)] were given to the patient; the abdominal pain and related symptoms disappeared completely within 3 days. This study proved the potential use of traditional Korean medicine for treating abdominal pain in elderly patients. PMID:25441951

  15. The effect of music on pain and acute confusion in older adults undergoing hip and knee surgery.

    PubMed

    McCaffrey, Ruth; Locsin, Rozzano

    2006-01-01

    The purpose of this study was to examine the effects of music listening in older adults following hip or knee surgery. Acute confusion and pain after surgery can increase length of stay and reduce function. Study results demonstrate a reduction in acute confusion and pain and improved ambulation and higher satisfaction scores in older adults who listened to music. PMID:16974175

  16. Acute dental pain, Part II: Diagnosis and emergency treatment.

    PubMed

    Antonelli, J R

    1990-09-01

    Part II of this two-part series differentiates and explores endodontic-related emergencies with reversible and irreversible pulpitis. Indications and contra-indications for vital pulp therapy are explained, and treatment is outlined. The inflammatory process involved in irreversible pulpal disease is summarized, and the clinical signs, symptoms, and treatment of irreversible pulpitis (with and without acute periradicular involvement, with pulp necrosis, and acute periradicular abscess with and without cellulitis) are discussed. PMID:2097056

  17. Multidetector computed tomography in the evaluation of pediatric acute abdominal pain in the emergency department.

    PubMed

    Lin, Wei-Ching; Lin, Chien-Heng

    2016-06-01

    The accurate diagnosis of pediatric acute abdominal pain is one of the most challenging tasks in the emergency department (ED) due to its unclear clinical presentation and non-specific findings in physical examinations, laboratory data, and plain radiographs. The objective of this study was to evaluate the impact of abdominal multidetector computed tomography (MDCT) performed in the ED on pediatric patients presenting with acute abdominal pain. A retrospective chart review of children aged <18 years with acute abdominal pain who visited the emergency department and underwent MDCT between September 2004 and June 2007 was conducted. Patients with a history of trauma were excluded. A total of 156 patients with acute abdominal pain (85 males and 71 females, age 1-17 years; mean age 10.9 ± 4.6 years) who underwent abdominal MDCT in the pediatric ED during this 3-year period were enrolled in the study. One hundred and eighteen patients with suspected appendicitis underwent abdominal MDCT. Sixty four (54.2%) of them had appendicitis, which was proven by histopathology. The sensitivity of abdominal MDCT for appendicitis was found to be 98.5% and the specificity was 84.9%. In this study, the other two common causes of nontraumatic abdominal emergencies were gastrointestinal tract (GI) infections and ovarian cysts. The most common etiology of abdominal pain in children that requires imaging with abdominal MDCT is appendicitis. MDCT has become a preferred and invaluable imaging modality in evaluating uncertain cases of pediatric acute abdominal pain in ED, in particular for suspected appendicitis, neoplasms, and gastrointestinal abnormalities. PMID:27154197

  18. A Prevalence and Management Study of Acute Pain in Children Attending Emergency Departments by Ambulance.

    PubMed

    Murphy, Adrian; McCoy, Siobhan; O'Reilly, Kay; Fogarty, Eoin; Dietz, Jason; Crispino, Gloria; Wakai, Abel; O'Sullivan, Ronan

    2016-01-01

    Pain is the most common symptom in the emergency setting and remains one of the most challenging problems for emergency care providers, particularly in the pediatric population. The primary objective of this study was to determine the prevalence of acute pain in children attending emergency departments (EDs) in Ireland by ambulance. In addition, this study sought to describe the prehospital and initial ED management of pain in this population, with specific reference to etiology of pain, frequency of pain assessment, pain severity, and pharmacological analgesic interventions. A prospective cross-sectional study was undertaken over a 12-month period of all pediatric patients transported by emergency ambulance to four tertiary referral hospitals in Ireland. All children (<16 years) who had pain as a symptom (regardless of cause) at any stage during the prehospital phase of care were included in this study. Over the study period, 6,371 children attended the four EDs by emergency ambulance, of which 2,635 (41.4%, 95% confidence interval 40.2-42.3%) had pain as a documented symptom on the ambulance patient care report (PCR) form. Overall 32% (n = 856) of children who complained of pain were subject to a formal pain assessment during the prehospital phase of care. Younger age, short transfer time to the ED, and emergency calls between midnight and 6 am were independently associated with decreased likelihood of having a documented assessment of pain intensity during the prehospital phase of care. Of the 2,635 children who had documented pain on the ambulance PCR, 26% (n = 689) received some form of analgesic agent prior to ED arrival. Upon ED arrival 54% (n = 1,422) of children had a documented pain assessment and some form of analgesic agent was administered to 50% (n = 1,324). Approximately 41% of children who attend EDs in Ireland by ambulance have pain documented as their primary symptom. This study suggests that the management of acute pain in children transferred by

  19. Single dose oral tiaprofenic acid for acute postoperative pain in adults

    PubMed Central

    Moore, R Andrew; Derry, Sheena; Moore, Maura; McQuay, Henry J

    2014-01-01

    Background Tiaprofenic acid is a a non-steroidal anti-inflammatory drug (NSAID). It is widely available around the world, with indications for osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, periarticular disorders, and strains and sprains. This review sought to evaluate the efficacy and safety of oral tiaprofenic acid in acute postoperative pain, using clinical studies of patients with established pain, and with outcomes measured primarily over 6 hours using standard methods. This type of study has been used for many decades to establish that drugs have analgesic properties. Objectives To assess the efficacy of single dose oral tiaprofenic acid in acute postoperative pain, and any associated adverse events. Search methods We searched Cochrane CENTRAL, MEDLINE, EMBASE and the Oxford Pain Relief Database for studies to June 2009. Selection criteria Randomised, double blind, placebo-controlled trials of single dose orally administered tiaprofenic acid in adults with moderate to severe acute postoperative pain. Data collection and analysis Two review authors independently assessed trial quality and extracted data. We planned to use area under the “pain relief versus time” curve to derive the proportion of participants with tiaprofenic acid experiencing at least 50% pain relief over 4 to 6 hours, using validated equations; to use number needed to treat to benefit (NNT); the proportion of participants using rescue analgesia over a specified time period; time to use of rescue analgesia; information on adverse events and withdrawals. Main results Not one of eleven studies identified by the searches and examined in detail studied oral tiaprofenic acid against placebo in patients with established postoperative pain and therefore no results are available. Authors’ conclusions In the absence of evidence of efficacy for oral tiaprofenic acid in acute postoperative pain, its use in this indication is not justified at present. Because trials clearly

  20. Acute effect of essential oil of Eugenia caryophyllata on cognition and pain in mice.

    PubMed

    Halder, Sumita; Mehta, Ashish K; Mediratta, Pramod K; Sharma, Krishna K

    2012-06-01

    The essential oil of Eugenia caryophyllata (clove oil; Family: Myrtaceae) is used in dental care as an antiseptic and analgesic. The study aims to evaluate the effect of clove oil on experimental models of pain and cognition in mice. To observe the acute effects of clove oil at different doses, the elevated plus maze was used for the assessment of cognition, and the tail flick and formalin tests were used for the study of pain. The formalin test showed that clove oil (0.1 ml/kg, i.p.) demonstrated significantly reduced pain response in both the phases. The lower doses (0.025 and 0.05 ml/kg, i.p.) reduced the formalin-induced pain response significantly in the second phase only. The tail-flick test showed variable response. The dose 0.1 ml/kg, clove oil, significantly decreased the tail-flick latency at 30 min and this effect was reversed by naloxone (1 mg/kg). On the contrary, the dose 0.025 ml/kg of clove oil, at 30 and 60 min increased the mean tail-flick latency compared to control group, but this effect was not statistically significant. Yet naloxone significantly (p < 0.05) reversed the effect of clove oil 0.025 ml/kg at 30 min. Clove oil (0.025 and 0.05 ml/kg, i.p.) significantly reversed the scopolamine-induced retention memory deficit induced by scopolamine, but clove oil (0.1 ml/kg, i.p.) significantly reversed both acquisition as well as retention deficits in elevated plus maze induced by the scopolamine. Clove oil exhibits reduced pain response by a predominantly peripheral action as evidenced by formalin test and the tail flick test showed the involvement of opioid receptors. Clove oil also significantly improved scopolamine-induced retention memory deficit at all doses. PMID:22453493

  1. Pediatric fear-avoidance model of chronic pain: foundation, application and future directions.

    PubMed

    Asmundson, Gordon J G; Noel, Melanie; Petter, Mark; Parkerson, Holly A

    2012-01-01

    The fear-avoidance model of chronic musculoskeletal pain has become an increasingly popular conceptualization of the processes and mechanisms through which acute pain can become chronic. Despite rapidly growing interest and research regarding the influence of fear-avoidance constructs on pain-related disability in children and adolescents, there have been no amendments to the model to account for unique aspects of pediatric chronic pain. A comprehensive understanding of the role of fear-avoidance in pediatric chronic pain necessitates understanding of both child⁄adolescent and parent factors implicated in its development and maintenance. The primary purpose of the present article is to propose an empirically-based pediatric fear-avoidance model of chronic pain that accounts for both child⁄adolescent and parent factors as well as their potential interactive effects. To accomplish this goal, the present article will define important fear-avoidance constructs, provide a summary of the general fear-avoidance model and review the growing empirical literature regarding the role of fear-avoidance constructs in pediatric chronic pain. Assessment and treatment options for children with chronic pain will also be described in the context of the proposed pediatric fear-avoidance model of chronic pain. Finally, avenues for future investigation will be proposed. PMID:23248813

  2. Pediatric fear-avoidance model of chronic pain: Foundation, application and future directions

    PubMed Central

    Asmundson, Gordon JG; Noel, Melanie; Petter, Mark; Parkerson, Holly A

    2012-01-01

    The fear-avoidance model of chronic musculoskeletal pain has become an increasingly popular conceptualization of the processes and mechanisms through which acute pain can become chronic. Despite rapidly growing interest and research regarding the influence of fear-avoidance constructs on pain-related disability in children and adolescents, there have been no amendments to the model to account for unique aspects of pediatric chronic pain. A comprehensive understanding of the role of fear-avoidance in pediatric chronic pain necessitates understanding of both child/adolescent and parent factors implicated in its development and maintenance. The primary purpose of the present article is to propose an empirically-based pediatric fear-avoidance model of chronic pain that accounts for both child/adolescent and parent factors as well as their potential interactive effects. To accomplish this goal, the present article will define important fear-avoidance constructs, provide a summary of the general fear-avoidance model and review the growing empirical literature regarding the role of fear-avoidance constructs in pediatric chronic pain. Assessment and treatment options for children with chronic pain will also be described in the context of the proposed pediatric fear-avoidance model of chronic pain. Finally, avenues for future investigation will be proposed. PMID:23248813

  3. Iatrogenic Consequences of Early Magnetic Resonance Imaging in Acute, Work-Related, Disabling Low Back Pain

    PubMed Central

    Webster, Barbara S.; Bauer, Ann Z.; Choi, YoonSun; Cifuentes, Manuel; Pransky, Glenn S.

    2013-01-01

    Study Design. Retrospective cohort study. Objective. To determine the effect of early (receipt ≤30 d postonset) magnetic resonance imaging (MRI) on disability and medical cost outcomes in patients with acute, disabling, work-related low back pain (LBP) with and without radiculopathy. Summary of Background Data. Evidence-based guidelines suggest that, except for “red flags,” MRI is indicated to evaluate patients with persistent radicular pain, after 1 month of conservative management, who are candidates for surgery or epidural steroid injections. Prior research has suggested an independent iatrogenic effect of nonindicated early MRI, but it had limited clinical information and/or patient populations. Methods. A nationally representative sample of workers with acute, disabling, occupational LBP was randomly selected, oversampling those with radiculopathy diagnoses (N = 1000). Clinical information from medical reports was used to exclude cases for which early MRI might have been indicated, or MRI occurred more than 30 days postonset (final cohort = 555). Clinical information was also used to categorize cases into “nonspecific LBP” and “radiculopathy” groups and further divided into “early-MRI” and “no-MRI” subgroups. The Cox proportional hazards model examined the association of early MRI with duration of the first episode of disability. Multivariate linear regression models examined the association with medical costs. All models adjusted for demographic and medical severity measures. Results. In our sample, 37% of the nonspecific LBP and 79.9% of the radiculopathy cases received early MRI. The early-MRI groups had similar outcomes regardless of radiculopathy status: much lower rates of going off disability and, on average, $12,948 to $13,816 higher medical costs than the no-MRI groups. Even in a subgroup with relatively minimal disability impact (≤30 d of total lost time post-MRI), medical costs were, on average, $7643 to $8584 higher in the

  4. Chronic pain associated with the Chikungunya Fever: long lasting burden of an acute illness

    PubMed Central

    2010-01-01

    Background Chikungunya virus (CHIKV) is responsible for major epidemics worldwide. Autochthonous cases were recently reported in several European countries. Acute infection is thought to be monophasic. However reports on chronic pain related to CHIKV infection have been made. In particular, the fact that many of these patients do not respond well to usual analgesics suggests that the nature of chronic pain may be not only nociceptive but also neuropathic. Neuropathic pain syndromes require specific treatment and the identification of neuropathic characteristics (NC) in a pain syndrome is a major step towards pain control. Methods We carried out a cross-sectional study at the end of the major two-wave outbreak lasting 17 months in Réunion Island. We assessed pain in 106 patients seeking general practitioners with confirmed infection with the CHIK virus, and evaluated its impact on quality of life (QoL). Results The mean intensity of pain on the visual-analogical scale (VAS) was 5.8 ± 2.1, and its mean duration was 89 ± 2 days. Fifty-six patients fulfilled the definition of chronic pain. Pain had NC in 18.9% according to the DN4 questionnaire. Conversely, about two thirds (65%) of patients with NC had chronic pain. The average pain intensity was similar between patients with or without NC (6.0 ± 1.7 vs 6.1 ± 2.0). However, the total score of the Short Form-McGill Pain Questionnaire (SF-MPQ)(15.5 ± 5.2 vs 11.6 ± 5.2; p < 0.01) and both the affective (18.8 ± 6.2 vs 13.4 ± 6.7; p < 0.01) and sensory subscores (34.3 ± 10.7 vs 25.0 ± 9.9; p < 0.01) were significantly higher in patients with NC. The mean pain interference in life activities calculated from the Brief Pain Inventory (BPI) was significantly higher in patients with chronic pain than in patients without it (6.8 ± 1.9 vs 5.9 ± 1.9, p < 0.05). This score was also significantly higher in patients with NC than in those without such a feature (7.2 ± 1.5 vs 6.1 ± 1.9, p < 0.05). Conclusions There

  5. The evolution of the painful sensitivity in acute and chronic stress.

    PubMed

    Cristea, A; Ciobanu, A; Stoenescu, M; Rusei, I

    1994-01-01

    The clinical research was made on two groups of young volunteer students. We considered stress consisting in chronic informational overexposure during the examination session and the acute stress from their emotions before a hard examination. The painful sensitivity was analysed by measuring the retraction time of the finger from water at 55 degrees C. The experimental research was made on a group of 100 male mice. The acute stress was performed by subjecting each mouse to swim (behavioral despair test). Painful sensitivity was determined by the test of the hot plate heated at 50 degrees C. Individuals with hyper (H) and hypo (h) painful sensitivity were selected for the tests. In chronic stress, the results proved increased painful sensitivity (hyperalgia) more important at "h" compared to "H" (p < 0.05). In acute stress decreased painful sensitivity (stress analgesia) was noticed more significant at "H" compared to h" (p < 0.05). All these results suggested that the extreme "H" and "h" are two different stress behaviors with opposite mechanisms involved in stress analgesia. This hypothesis is related with studies which demonstrate the involvement in stress analgesia of non-opioid monoaminergic mechanisms together with the opioid mechanisms (Lewis, 1980). PMID:8640371

  6. The Relationship of Depression to Work Status during the Acute Period of Low Back Pain.

    ERIC Educational Resources Information Center

    Beaudet, Joanne; Rasch, John

    1988-01-01

    Investigated relationship of Beck Depression Inventory (BDI) scores to employment status and time since injury among persons with acute low back pain. Work status was unrelated to BDI scores. Participants 5 to 6 months post-injury scored higher than participants l month post-injury; participants working 5 to 6 months post-injury scored higher than…

  7. Acute Systemic Infusion of Bupropion Decrease Formalin Induced Pain Behavior in Rat

    PubMed Central

    Naderi, Somayyeh; Ashrafi Osalou, Mostafa; Cankurt, Ulker

    2014-01-01

    Background The chronic pain can disturb physical, psychological, and social performances. Analgesic agents are widely used but some antidepressants (ADs) showed analgesia also. Bupropion is using for smoke cessation but it can change morphine withdrawal signs such as pain. This study tested the acute systemic effect of bupropion on formalin induced pain behavior in rats. Methods Wistar male healthy rats were divided into 7 groups (control, sham, and 5 treated groups with 10, 30, 90, 120, and 200 mg/kg of bupropion, i.p.). The bupropion injected 3 hours prior to formalin induced pain behavior. Formalin (50 µl, 2.5%) was injected subcutaneously in dorsal region of right hindpaw in all animals. Nociceptive signs were observed continuously on-line and off-line each minute. Common pain scoring was used for pain assessment. Results The analysis of data by one-way ANOVA showed that bupropion can reduce pain scores in the second phase but not in first phase. Bupropion decreased the licking/biting duration significantly in first and second phase of formalin test. Conclusions The results showed that bupropion has analgesic effects at systemic application. The change of second phase of the pain behavior was significant and it revealed that central mechanisms involve in bupropion analgesia. PMID:24748939

  8. Regional anesthesia for management of acute pain in the intensive care unit

    PubMed Central

    De Pinto, Mario; Dagal, Armagan; O’Donnell, Brendan; Stogicza, Agnes; Chiu, Sheila; Edwards, William Thomas

    2015-01-01

    Pain is a major problem for Intensive Care Unit (ICU) patients. Despite numerous improvements it is estimated that as many as 70% of the patients experience moderate-to-severe postoperative pain during their stay in the ICU. Effective pain management means not only decreasing pain intensity, but also reducing the opioids’ side effects. Minimizing nausea, vomiting, urinary retention, and sedation may indeed facilitate patient recovery and it is likely to shorten the ICU and hospital stay. Adequate postoperative and post-trauma pain management is also crucial for the achievement of effective rehabilitation. Furthermore, recent studies suggest that effective acute pain management may be helpful in reducing the development of chronic pain. When used appropriately, and in combination with other treatment modalities, regional analgesia techniques (neuraxial and peripheral nerve blocks) have the potential to reduce or eliminate the physiological stress response to surgery and trauma, decreasing the possibility of surgical complications and improving the outcomes. Also they may reduce the total amount of opioid analgesics necessary to achieve adequate pain control and the development of potentially dangerous side effects. PMID:26557482

  9. Regional anesthesia for management of acute pain in the intensive care unit.

    PubMed

    De Pinto, Mario; Dagal, Armagan; O'Donnell, Brendan; Stogicza, Agnes; Chiu, Sheila; Edwards, William Thomas

    2015-01-01

    Pain is a major problem for Intensive Care Unit (ICU) patients. Despite numerous improvements it is estimated that as many as 70% of the patients experience moderate-to-severe postoperative pain during their stay in the ICU. Effective pain management means not only decreasing pain intensity, but also reducing the opioids' side effects. Minimizing nausea, vomiting, urinary retention, and sedation may indeed facilitate patient recovery and it is likely to shorten the ICU and hospital stay. Adequate postoperative and post-trauma pain management is also crucial for the achievement of effective rehabilitation. Furthermore, recent studies suggest that effective acute pain management may be helpful in reducing the development of chronic pain. When used appropriately, and in combination with other treatment modalities, regional analgesia techniques (neuraxial and peripheral nerve blocks) have the potential to reduce or eliminate the physiological stress response to surgery and trauma, decreasing the possibility of surgical complications and improving the outcomes. Also they may reduce the total amount of opioid analgesics necessary to achieve adequate pain control and the development of potentially dangerous side effects. PMID:26557482

  10. Acute Phase Protein Lipocalin-2 Is Associated with Formalin-induced Nociception and Pathological Pain

    PubMed Central

    Jha, Mithilesh Kumar; Jeon, Sangmin; Jin, Myungwon; Lee, Won-Ha

    2013-01-01

    Lipocalin-2 (LCN2) is an acute-phase protein induced by injury, infection, or other inflammatory stimuli. LCN2 binds small hydrophobic ligands and interacts with cell surface receptor to regulate diverse cellular processes. The role of LCN2 as a chemokine inducer in the central nervous system (CNS) has been previously reported. Based on the previous participation of LCN2 in neuroinflammation, we investigated the role of LCN2 in formalin-induced nociception and pathological pain. Formalin-induced nociceptive behaviors (licking/biting) and spinal microglial activation were significantly reduced in the second or late phase of the formalin test in Lcn2 knockout mice. Likewise, antibody-mediated neutralization of spinal LCN2 attenuated the mechanical hypersensitivity induced by peripheral nerve injury in mice. Taken together, our results suggest that LCN2 can be therapeutically targeted, presumably for both prevention and reversal of acute inflammatory pain as well as pathological pain. PMID:24385948

  11. Initial approach to patients with acute lower back pain.

    PubMed

    Joaquim, Andrei Fernandes

    2016-04-01

    Low back pain is in one of the most common reasons for seeking medical care in emergency care units, and also the second most common cause of work absenteeism. The recognition of red flags for serious diseases such as tumors and fractures, through proper history-taking and clinical examination, is essential for proper treatment and to rule out differential diagnoses. In the absence of suspected severe underlying disease, subsidiary radiological examinations are unnecessary. Analgesic and anti-inflammatory drugs are the treatment of choice and can be cautiously associated with muscle relaxants and opioids in more severe cases. Most patients will have complete improvement of symptoms after a few months, but a minority can develop chronic low back pain or present with recurrent episodes. The proper understanding of all of the above can optimize results and avoid diagnostic and therapeutic errors. PMID:27167551

  12. A case of Carney complex presenting as acute testicular pain

    PubMed Central

    Alleemudder, Adam; Pillai, Rajiv

    2016-01-01

    We describe the case of a 7-year-old boy who presented with testicular pain but was found to have bilateral testicular lesions later confirmed as Sertoli cell tumors. Genetic testing confirmed a PRKAR1A gene mutation consistent with Carney complex, a rare genetic disorder characterized by skin lesions, myxomas, and multiple endocrine neoplasms. A review of the condition is made highlighting the association with testicular tumors, particularly of Sertoli cell origin. PMID:27453662

  13. A case of Carney complex presenting as acute testicular pain.

    PubMed

    Alleemudder, Adam; Pillai, Rajiv

    2016-01-01

    We describe the case of a 7-year-old boy who presented with testicular pain but was found to have bilateral testicular lesions later confirmed as Sertoli cell tumors. Genetic testing confirmed a PRKAR1A gene mutation consistent with Carney complex, a rare genetic disorder characterized by skin lesions, myxomas, and multiple endocrine neoplasms. A review of the condition is made highlighting the association with testicular tumors, particularly of Sertoli cell origin. PMID:27453662

  14. Acute experimentally induced neck pain does not affect fatigability of the peripheral biceps brachii muscle.

    PubMed

    Hung, Laurie Y; Maracle, Emmalee; Srbely, John Z; Brown, Stephen H M

    2014-10-01

    Evidence has shown that upper limb muscles peripheral to the cervical spine, such as the biceps brachii, can demonstrate functional deficits in the presence of chronic neck pain. However, few studies have examined how neck pain can affect the fatigability of upper limb muscles; therefore we were motivated to investigate the effects of acutely induced neuropathic neck pain on the fatigability of the biceps brachii muscle during isometric contraction to exhaustion. Topical capsaicin was used to induce neck pain in 11 healthy male participants. Surface EMG signals were recorded from the biceps brachii during an isometric elbow flexion fatigue task in which participants held a weight equivalent to 30% of their MVC until exhaustion. Two experimental sessions, one placebo and one capsaicin, were conducted separated by two days. EMG mean power frequency and average normalized activation values were calculated over the course of the fatigue task. In the presence of pain, there was no statistically significant effect on EMG parameters during fatigue of the biceps brachii. These results demonstrate that acutely induced neuropathic neck pain does not affect the fatigability, under the tested conditions, of the biceps brachii. PMID:24718930

  15. Acute and Chronic Pain on the Battlefield: Lessons Learned from Point of Injury to the United States.

    PubMed

    Croll, Scott M; Griffith, Scott R

    2016-01-01

    Historically, war tends to accelerate innovation within military medicine. In this article, the authors argue this truism has recurred in the case of acute and chronic pain management for combatants in the global war on terrorism (GWOT). Advances in regional anesthesia techniques and multimodal acute pain care are highlighted in light of the typical weapons, injuries, and comorbid conditions of the modern combat era. Reported success of providing chronic pain care in the war theater during GWOT is discussed in the context of operational requirements for current and future wars. A description is provided of the Pain Management Task Force (PMTF) and Pain Campaign Plan which was initiated during GWOT. The PMTF effort enhanced pain education and clinical pain care through leadership and organizational changes, which created broader access to pain treatments for patients and more standardized treatment capabilities across the enterprise. PMID:27215875

  16. Coronary computed tomography angiography for the evaluation of patients with acute chest pain.

    PubMed

    Rajani, R; Brum, R L; Preston, R; Carr-White, G; Berman, D S

    2011-12-01

    Acute chest pain is a common presenting complaint of patients attending emergency room departments. Despite this, it can often be challenging to completely exclude a diagnosis of acute coronary syndrome following an initial standard clinical and biochemical evaluation. As a result of this, patients are often admitted to hospital until the treating clinician is satisfied that this diagnosis can be excluded. This process imparts a significant health economic burden by not only increasing hospital bed occupancy rates but also by the unnecessary layering of diagnostic investigations. With the rapid advances in coronary computed tomography angiography (CTA), there has been considerable interest in whether coronary CTA may be a viable alternative to this current standard care. We review the current literature and supporting evidence for utilising coronary CTA in the evaluation of patients presenting with acute chest pain in terms of its diagnostic accuracy, safety, cost-effectiveness and prognostic implications. PMID:22093533

  17. Acute Cytomegalovirus Hepatitis in an Immunocompetent Host as a Reason for Upper Right Abdominal Pain

    PubMed Central

    Jensen, Kai Oliver; Angst, Eliane; Hetzer, Franc Heinrich; Gingert, Christian

    2016-01-01

    Cytomegalovirus infections are widely distributed with a seroprevalence of up to 100%. The majority of the cases take a silent course or deal with unspecific clinical symptoms. Complications in immunocompetent patients are rare but may affect the liver and lead up to an acute organ failure. In this case report, we describe a 35-year-old immunocompetent female with an acute cytomegalovirus infection presenting as acute hepatitis with ongoing upper right abdominal pain after cholecystectomy. Upper right abdominal pain is a common symptom with a wide range of differential diagnoses. If common reasons can be excluded, we want to sensitize for cytomegalovirus infection as a minor differential diagnosis even in immunocompetent patients. PMID:27403100

  18. Conditioned place preference reveals tonic pain in an animal model of central pain

    PubMed Central

    Davoody, Leyla; Quiton, Raimi L.; Lucas, Jessica M.; Ji, Yadong; Keller, Asaf; Masri, Radi

    2011-01-01

    A limitation of animal models of central pain is their inability to recapitulate all clinical characteristics of the human condition. Specifically, many animal models rely on reflexive measures of hypersensitivity and ignore, or cannot assess spontaneous pain, the hallmark characteristic of central pain in humans. Here, we adopt a conditioned place preference paradigm to test if animals with lesions in the anterolateral quadrant of the spinal cord develop signs consistent with spontaneous pain. This paradigm relies on the fact that pain relief is rewarding to animals, and has been used previously to show that animals with peripheral nerve injury develop tonic pain. With the use of two analgesic treatments commonly used to treat patients with central pain (clonidine infusion and motor cortex stimulation), we demonstrate that analgesic treatments are rewarding to animals with spinal cord lesions but not sham operated controls. These findings are consistent with the conclusion that animals with spinal cord injury suffer from tonic pain. PMID:21515090

  19. Calcium/calmodulin-dependent protein kinase IV mediates acute nicotine-induced antinociception in acute thermal pain tests

    PubMed Central

    Jackson, Kia J.; Damaj, M. Imad

    2014-01-01

    Calcium activated second messengers such as calcium/calmodulin-dependent protein kinase II have been implicated in drug-induced antinociception. The less abundant calcium activated second messenger, calcium/calmodulin-dependent protein kinase IV (CaMKIV), mediates emotional responses to pain and tolerance to morphine analgesia; however its role in nicotine-mediated antinociception is currently unknown. The goal of this study was to evaluate the role of CaMKIV in the acute effects of nicotine, primarily acute nicotine- induced antinociception. CaMKIV knockout (−/−), heterozygote (+/−), and wild-type (+/+) mice were injected with various doses of nicotine and evaluated in a battery of tests, including the tail-flick and hot-plate tests for antinociception, body temperature, and locomotor activity. Our results show a genotype-dependent reduction in tail-flick and hot- plate latency in CaMKIV (+/−) and (−/−) mice after acute nicotine treatment, while no difference was observed between genotypes in the body temperature and locomotor activity assessments. The results of this study support a role for CaMKIV in acute nicotine-induced spinal and supraspinal pain mechanisms, and further implicate involvement of calcium-dependent mechanisms in drug-induced antinociception. PMID:24196027

  20. Synaptic plasticity in the anterior cingulate cortex in acute and chronic pain.

    PubMed

    Bliss, Tim V P; Collingridge, Graham L; Kaang, Bong-Kiun; Zhuo, Min

    2016-08-01

    The anterior cingulate cortex (ACC) is activated in both acute and chronic pain. In this Review, we discuss increasing evidence from rodent studies that ACC activation contributes to chronic pain states and describe several forms of synaptic plasticity that may underlie this effect. In particular, one form of long-term potentiation (LTP) in the ACC, which is triggered by the activation of NMDA receptors and expressed by an increase in AMPA-receptor function, sustains the affective component of the pain state. Another form of LTP in the ACC, which is triggered by the activation of kainate receptors and expressed by an increase in glutamate release, may contribute to pain-related anxiety. PMID:27307118

  1. No evidence of real progress in treatment of acute pain, 1993–2012: scientometric analysis

    PubMed Central

    Correll, Darin J; Vlassakov, Kamen V; Kissin, Igor

    2014-01-01

    Over the past 2 decades, many new techniques and drugs for the treatment of acute pain have achieved widespread use. The main aim of this study was to assess the progress in their implementation using scientometric analysis. The following scientometric indices were used: 1) popularity index, representing the share of articles on a specific technique (or a drug) relative to all articles in the field of acute pain; 2) index of change, representing the degree of growth in publications on a topic compared to the previous period; and 3) index of expectations, representing the ratio of the number of articles on a topic in the top 20 journals relative to the number of articles in all (>5,000) biomedical journals covered by PubMed. Publications on specific topics (ten techniques and 21 drugs) were assessed during four time periods (1993–1997, 1998–2002, 2003–2007, and 2008–2012). In addition, to determine whether the status of routine acute pain management has improved over the past 20 years, we analyzed surveys designed to be representative of the national population that reflected direct responses of patients reporting pain scores. By the 2008–2012 period, popularity index had reached a substantial level (≥5%) only with techniques or drugs that were introduced 30–50 years ago or more (epidural analgesia, patient-controlled analgesia, nerve blocks, epidural analgesia for labor or delivery, bupivacaine, and acetaminophen). In 2008–2012, promising (although modest) changes of index of change and index of expectations were found only with dexamethasone. Six national surveys conducted for the past 20 years demonstrated an unacceptably high percentage of patients experiencing moderate or severe pain with not even a trend toward outcome improvement. Thus, techniques or drugs that were introduced and achieved widespread use for acute pain management within the past 20 years have produced no changes in scientometric indices that would indicate real progress and

  2. MRI assessment of paraspinal muscles in patients with acute and chronic unilateral low back pain

    PubMed Central

    Wan, Q; Lin, C; Li, X; Zeng, W

    2015-01-01

    Objective: To investigate the changes in paraspinal muscle cross-sectional area (CSA) and composition, using the digital data from lumbar spine MRIs of patients with acute and chronic low back pain (LBP). Methods: In total, 178 patients with unilateral LBP who had lumbar MRI examination were recruited. The data were obtained by a retrospective documentation audit. The CSAs and mean signal intensities of the bilateral paraspinal muscles [psoas major (PM), quadratus lumborum, multifidus (MF) and erector spinae (ES)] were measured, and the percentage of fat infiltration was calculated. The data between the painful side and non-painful side were compared, and between-group comparisons were tested. 42 patients with chronic unilateral LBP could indicate the problem level, and the CSA and mean signal intensity of the MF muscle were analysed at the problem level, and one vertebral above and one vertebral level below the problem level. Results: The CSAs of the PM and ES muscles were significantly decreased in the acute LBP group, while in the chronic LBP group, significant reduction in CSA was found in the MF and ES muscles on the painful side compared with the non-painful side. The mean signal intensity and fat content of the ES muscle on the painful side in the chronic LBP group was significantly higher than that on the painful side in the acute LBP group. The significant decrease of CSA in the MF muscle was found at multiple levels on the painful side. Conclusion: The present findings show that there is selective ipsilateral atrophy of paraspinal muscles, specific to the symptomatic side, in patients with acute and chronic LBP. The reduction of the muscle CSA and increased fatty infiltration occurred synchronously, and the extent of change is significantly greater in chronic LBP in the ES muscle. Atrophy of the MF muscle appears to be at multiple levels but side specific in relation to symptoms in patients with chronic LBP, and the decreased muscle CSA may occur prior to

  3. Pain

    MedlinePlus

    ... realize you have a medical problem that needs treatment. Once you take care of the problem, pain ... Fortunately, there are many ways to treat pain. Treatment varies depending on the cause of pain. Pain ...

  4. Effect of ω-conotoxin MVIIA and Phα1β on paclitaxel-induced acute and chronic pain.

    PubMed

    Rigo, Flávia K; Dalmolin, Gerusa D; Trevisan, Gabriela; Tonello, Raquel; Silva, Mariane A; Rossato, Mateus F; Klafke, Jonatas Z; Cordeiro, Marta do N; Castro Junior, Célio J; Montijo, Danuza; Gomez, Marcus V; Ferreira, Juliano

    2013-12-01

    The treatment with the chemotherapeutic agent paclitaxel produces a painful peripheral neuropathy, and is associated with an acute pain syndrome in a clinically significant number of patients. However, no standard therapy has been established to manage the acute pain or the chronic neuropathic pain related to paclitaxel. In the present study, we evaluated the analgesic potential of two N-type voltage-gated calcium channel (VGCC) blockers, ω-conotoxin MVIIA and Phα1β, on acute and chronic pain induced by paclitaxel. Adult male rats were treated with four intraperitoneal injections of paclitaxel (1+1+1+1mg/kg, in alternate days) and the development of mechanical hyperalgesia was evaluated 24h (acute painful stage) or 15days (chronic painful stage) after the first paclitaxel injection. Not all animals showed mechanical hyperalgesia 24h after the first paclitaxel injection, but those that showed developed a more intense mechanical hyperalgesia at the chronic painful stage. Intrathecal administration (i.t.) of ω-conotoxin MVIIA (3-300pmol/site) or Phα1β (10-300pmol/site) reduced the mechanical hyperalgesia either at the acute or at the chronic painful stage induced by paclitaxel. When administered at the acute painful stage, ω-conotoxin MVIIA (300pmol/site, i.t.) and Phα1β (300pmol/site, i.t.) prevented the worsening of chronic mechanical hyperalgesia. Furthermore, Phα1β (30-300pmol/site, i.t.) elicited less adverse effects than ω-conotoxin MVIIA (10-300 pmol/site, i.t.). Taken together, our data evidence the involvement of N-type VGCC in pain sensitization induced by paclitaxel and point out the potential of Phα1β as a safer alternative than ω-conotoxin MVIIA to treat the pain related to paclitaxel. PMID:24148893

  5. Animal models and pharmacology of herpetic and postherpetic pain.

    PubMed

    Kuraishi, Yasushi; Sasaki, Atsushi

    2014-01-01

    Varicella-zoster virus (VZV) causes varicella upon primary infection and subsequently becomes latent in the sensory ganglia. Reactivation of latent VZV in the sensory ganglion results in herpes zoster, which usually begins with pain and dysesthesia. Pain that persists long after healing of the rash is termed postherpetic neuralgia. VZV inoculation into rats induces mechanical allodynia and thermal hyperalgesia without causing herpes zoster. As with VZV, herpes simplex virus 1 (HSV1) is an alphaherpesvirus. HSV1 also becomes latent in the sensory ganglia after primary infection, and reactivation of latent HSV1 in the sensory ganglion results in herpes simplex. HSV1 inoculation into mice causes zoster-like skin lesions together with mechanical allodynia and mechanical hyperalgesia. A marked difference between the two rodent models is whether the herpes virus proliferates in the nervous system after inoculation. VZV-inoculated rats are useful for investigating mechanical allodynia induced by latent infection with herpes virus. HSV1-inoculated mice are useful for investigating mechanical allodynia induced by the proliferation of herpes virus in sensory neurons and for assessing the effects of acute herpetic pain on the incidence of postherpetic allodynia. PMID:24496651

  6. Are Indians and females less tolerant to pain? An observational study using a laboratory pain model.

    PubMed

    Das Gupta, E; Zailinawati, A H; Lim, A W; Chan, J B; Yap, S H; Hla, Y Y; Kamil, M A; Teng, C L

    2009-06-01

    In Malaysia, it is a common belief among health care workers that females and Indians have lower pain threshold. This experience, although based on anecdotal experience in the healthcare setting, does not allow differentiation between pain tolerance, and pain expression. To determine whether there is a difference in the tolerance to pain between the three main ethnic groups, namely the Malays, Chinese and Indians as well as between males and females. This was a prospective study, using a laboratory pain model (ischaemic pain tolerance) to determine the pain tolerance of 152 IMU medical students. The mean age of the students was 21.8 years (range 18-29 years). All of them were unmarried. The median of ischaemic pain tolerance for Malays, Chinese and Indians were 639s, 695s and 613s respectively (p = 0.779). However, statistically significant difference in ischaemic pain tolerance for males and females Indian students were observed. Possible ethnic difference in pain tolerance in casual observation is not verified by this laboratory pain model. Difference in pain tolerance between genders is shown only for Indians. PMID:20058568

  7. The Gate Theory of Pain Revisited: Modeling Different Pain Conditions with a Parsimonious Neurocomputational Model.

    PubMed

    Ropero Peláez, Francisco Javier; Taniguchi, Shirley

    2016-01-01

    The gate control theory of pain proposed by Melzack and Wall in 1965 is revisited through two mechanisms of neuronal regulation: NMDA synaptic plasticity and intrinsic plasticity. The Melzack and Wall circuit was slightly modified by using strictly excitatory nociceptive afferents (in the original arrangement, nociceptive afferents were considered excitatory when they project to central transmission neurons and inhibitory when projecting to substantia gelatinosa). The results of our neurocomputational model are consistent with biological ones in that nociceptive signals are blocked on their way to the brain every time a tactile stimulus is given at the same locus where the pain was produced. In the computational model, the whole set of parameters, independently of their initialization, always converge to the correct values to allow the correct computation of the circuit. To test the model, other painful conditions were analyzed: phantom limb pain, wind-up and wind-down pain, breakthrough pain, and demyelinating syndromes like Guillain-Barré and multiple sclerosis. PMID:27088014

  8. The Gate Theory of Pain Revisited: Modeling Different Pain Conditions with a Parsimonious Neurocomputational Model

    PubMed Central

    Ropero Peláez, Francisco Javier; Taniguchi, Shirley

    2016-01-01

    The gate control theory of pain proposed by Melzack and Wall in 1965 is revisited through two mechanisms of neuronal regulation: NMDA synaptic plasticity and intrinsic plasticity. The Melzack and Wall circuit was slightly modified by using strictly excitatory nociceptive afferents (in the original arrangement, nociceptive afferents were considered excitatory when they project to central transmission neurons and inhibitory when projecting to substantia gelatinosa). The results of our neurocomputational model are consistent with biological ones in that nociceptive signals are blocked on their way to the brain every time a tactile stimulus is given at the same locus where the pain was produced. In the computational model, the whole set of parameters, independently of their initialization, always converge to the correct values to allow the correct computation of the circuit. To test the model, other painful conditions were analyzed: phantom limb pain, wind-up and wind-down pain, breakthrough pain, and demyelinating syndromes like Guillain-Barré and multiple sclerosis. PMID:27088014

  9. Serial assessment of laser Doppler flow during acute pain crises in sickle cell disease

    PubMed Central

    Shi, Patricia Ann; Manwani, Deepa; Olowokure, Olugbenga; Nandi, Vijay

    2014-01-01

    Changes in basal laser Doppler flowmetry (LDF) of skin blood flow in sickle cell disease are reported to have pathophysiologic relevance in pain crisis. This is the first study to strictly control for LDF variability in determining the value of serial, basal (unprovoked) skin LDF as a practical method to assess resolution of acute pain crisis in sickle cell patients. Daily LDF measurements were repeated on the exact same skin areas of the calf and forehead throughout each of 12 hospital admissions for uncomplicated acute pain crisis. A progressive increase in perfusion was observed in the calf throughout hospitalization as pain crisis resolved, but measurement reproducibility in the calf was poor. Reproducibility in the forehead was better, but no significant trend over time in perfusion was seen. There was no significant correlation between perfusion and pain scores over time. There was also no significant pattern of LDF oscillations over time. In conclusion, only perfusion units and not oscillatory pattern of LDF has probable pathophysiological significance in sickle cell disease vaso-occlusion. The reproducibility of basal skin LDF specifically in sickle cell disease needs to be confirmed. PMID:24857171

  10. [Use of animal models of clinical pain].

    PubMed

    Guilbaud, G

    1990-11-01

    For a better understanding of clinical pain, several groups involved in the study of basic pain mechanisms have proposed the use of various experimental models close to clinical situations. They are based either on neurogenic or inflammatory processes. Data obtained with three of these models will be developed in the paper: rats rendered arthritic by Freund's adjuvant injection into the tail, rats with an intraplantar injection of carrageenin in one hind-paw, rats with a moderate ligature of one common sciatic nerve. The various pharmacological approaches revealed dramatic changes of the analgesic effects of morphine and other opioid substances, and a spectacular modification of the endogenous opioid reactivity. A further enhancement of the initial hyperalgesia was observed with high doses (1-3 mg/kg iv) of naloxone (known as an antagonist of morphine), contrasting with the paradoxical analgesia induced with the low dose (peaking up for 3 micrograms/kg iv). Electrophysiological studies emphasized dramatic changes of neuronal responsiveness in structures involved in the transmission of the nociceptive messages. In each of these models, electrophysiological data provide new insights on the physiopathological mechanisms of the related clinical pain. PMID:2092200

  11. Effects of nicotinic acetylcholine receptor agonists in assays of acute pain-stimulated and pain-depressed behaviors in rats.

    PubMed

    Freitas, Kelen C; Carroll, F Ivy; Negus, S Stevens

    2015-11-01

    Agonists at nicotinic acetylcholine receptors (nAChRs) constitute one drug class being evaluated as candidate analgesics. Previous preclinical studies have implicated α4β2 and α7 nAChRs as potential mediators of the antinociceptive effects of (–)-nicotine hydrogen tartrate (nicotine) and other nAChR agonists; however, these studies have relied exclusively on measures of pain-stimulated behavior, which can be defined as behaviors that increase in frequency, rate, or intensity after presentation of a noxious stimulus. Pain is also associated with depression of many behaviors, and drug effects can differ in assays of pain-stimulated versus pain-depressed behavior. Accordingly, this study compared the effects of nicotine, the selective α4/6β2 agonist 5-(123I)iodo-3-[2(S)-2-azetidinylmethoxy]pyridine (5-I-A-85380), and the selective α7 agonist N-(3R)-1-azabicyclo(2.2.2)oct-3-yl-4-chlorobenzamide in assays of pain-stimulated and pain-depressed behavior in male Sprague-Dawley rats. Intraperitoneal injection of dilute lactic acid served as an acute noxious stimulus to either stimulate a stretching response or depress the operant responding, which is maintained by electrical brain stimulation in an intracranial self-stimulation (ICSS) procedure. Nicotine produced a dose-dependent, time-dependent, and mecamylamine-reversible blockade of both acid-stimulated stretching and acid-induced depression of ICSS. 5-I-A-85380 also blocked both acid-stimulated stretching and acid-induced depression of ICSS, whereas N-(3R)-1-azabicyclo(2.2.2)oct-3-yl-4-chlorobenzamide produced no effect in either procedure. Both nicotine and 5-I-A-85380 were ≥10-fold more potent in blocking the acid-induced depression of ICSS than in blocking the acid-induced stimulation of stretching. These results suggest that stimulation of α4β2 and/or α6β2 nAChRs may be especially effective to alleviate the signs of pain-related behavioral depression in rats; however, nonselective behavioral effects

  12. Changes in sleep, food intake, and activity levels during acute painful episodes in children with sickle cell disease.

    PubMed

    Jacob, Eufemia; Miaskowski, Christine; Savedra, Marilyn; Beyer, Judith E; Treadwell, Marsha; Styles, Lori

    2006-02-01

    As part of a larger study that examined pain experience, pain management, and pain outcomes among children with sickle cell disease, functional status (sleep, food intake, and activity levels) was examined during hospitalization for acute painful episodes. Children were asked to rate the amount of pain they experienced as well as the amount of time they slept, the amount of food they ate, and the amount of activity they had everyday. Children reported high levels of pain, which showed only a small decrease throughout hospitalization, and had disrupted sleep and wake patterns, decreased food intake, and decreased activity levels. Nurses need to routinely monitor functional status during acute painful episodes so that strategies to promote adequate sleep, food intake, and activity may be incorporated to minimize long-term negative outcomes in children with sickle cell disease. PMID:16428011

  13. Acute Pelvic Pain: A Ball Pen May Be a Cause?

    PubMed Central

    Rai, Garjesh Singh; Roshan, Rakesh; Vyas, Mahendra Mohan; Goel, Deepak

    2014-01-01

    Chronic Urinary tract infection (UTI) is a common problem in women and can be seen without any significant anatomical and functional pathology. Foreign bodies within the urinary bladder are not rare and should be considered as a cause of chronic and recurrent UTI. Intravesical foreign bodies can be self inflicted, iatrogenic or migration from adjacent organs. History in these cases is often misleading and presentation of foreign body mostly becomes apparent as suprapubic pain, dysuria with or without hematuria. We present a case of self-inflicted foreign body within the bladder of a young female who presented with recurrent urinary tract infections for six months that did not respond to medical treatment. PMID:25654009

  14. Spontaneous pneumomediastinum: an important differential in acute chest pain.

    PubMed

    Hogan, Francesca; McCullough, Chris; Rahman, Asif

    2014-01-01

    A 38-year-old man presented with pleuritic chest pain that was present on waking and localised to the left costal margin with no radiation. He was otherwise asymptomatic and denied preceding trauma, heavy lifting, coughing or recent vomiting. Observations and examination were unremarkable; however, a chest radiograph showed a pneumomediastinum. Spontaneous pneumomediastinum (SPM) is a rare condition that tends to follow a benign clinical course. A CT of the chest is generally only indicated if the chest X-ray fails to show an SPM in patients for whom there is a high index of clinical suspicion. A contrast-enhanced swallow study is only indicated if there is suspicion of an oesophageal tear or rupture. Evidence suggests that patients with SPM can be managed conservatively and observed for 24 h. PMID:25432910

  15. Tuberculosis of the cavum revealed by acute facial pain.

    PubMed

    Gilbert, Thomas; Chidiac, Christian; Bonnefoy, Marc; Ferry, Tristan

    2015-01-01

    An 85-year-old woman presented for assessment of recurring episodes of intense hemifacial pain, mimicking trigeminal neuralgia, associated with tinnitus. A necrotic tumour of the cavum with compression of the left Eustachian tube and skull-base invasion was discovered on brain MRI. Although the tumour was initially thought to be malignant, the histopathological findings on the biopsy were compatible with tuberculosis, later confirmed by the cultures. F-18-fluorodeoxyglucose positron emission tomography (PET)/CT showed an intense signal of the cavum, cervical and mediastinal lymph nodes, and also of two small nodules of the apex of each lung. Currently, after 9 months of combined antituberculosis antibiotics, the initial lesion has almost disappeared from both PET scan and MRI. This case highlights the importance of systematically screening for tuberculosis in the assessment of nasopharyngeal tumours. PMID:26567238

  16. Rofecoxib: a review of its use in the management of osteoarthritis, acute pain and rheumatoid arthritis.

    PubMed

    Matheson, A J; Figgitt, D P

    2001-01-01

    Rofecoxib is a selective cyclo-oxygenase (COX)-2 inhibitor which has little or no effect on the COX-1 isoenzyme at doses up to 1000 mg/day. Rofecoxib has greater selectivity for COX-2 than celecoxib, meloxicam, diclofenac and indomethacin. In well-controlled clinical trials, rofecoxib 12.5 to 500 mg/day has been evaluated for its efficacy in the treatment of osteoarthritis, acute pain and rheumatoid arthritis [lower dosages (5 to 125 mg/day) were generally used in the chronic pain indications]. In the treatment of patients with osteoarthritis, rofecoxib was more effective in providing symptomatic relief than placebo, paracetamol (acetaminophen) and celecoxib and was similar in efficacy to ibuprofen, diclofenac, naproxen and nabumetone. Overall, both the physician's assessment of disease status and the patient's assessment of response to therapy tended to favour rofecoxib. In patients with postsurgical dental pain, pain after spinal fusion or orthopaedic surgery, or primary dysmenorrhoea, rofecoxib provided more rapid and more sustained pain relief and reduced requirements for supplemental morphine use after surgery than placebo. Rofecoxib was more efficacious than celecoxib in patients with acute dental pain and pain after spinal fusion surgery, although celecoxib may have been used at a subtherapeutic dose. In comparison with traditional nonsteroidal anti-inflammatory drugs (NSAIDs) ibuprofen, diclofenac and naproxen sodium, rofecoxib was similar in efficacy in the treatment of acute pain. Although naproxen sodium provided more rapid pain relief than rofecoxib in patients with primary dysmenorrhoea, the reverse was true after orthopaedic surgery: rofecoxib provided more rapid pain relief and less supplemental morphine was needed. Rofecoxib was as effective as naproxen in providing symptomatic relief for over 8700 patients with rheumatoid arthritis. Compared with traditional NSAID therapy, rofecoxib had a significantly lower incidence of endoscopically confirmed

  17. Single dose oral naproxen and naproxen sodium for acute postoperative pain (Review)

    PubMed Central

    Mason, L; Edwards, JE; Moore, RA; McQuay, HJ

    2014-01-01

    Background Postoperative pain is often poorly managed. Treatment options include a range of drug therapies such as non-steroidal anti-inflammatory drugs (NSAIDs) of which naproxen is one. Naproxen is used to treat a variety of painful conditions including acute postoperative pain, and is often combined with sodium to improve its solubility for oral administration. Naproxen sodium 550 mg (equivalent to 500 mg of naproxen) is considered to be an effective dose for treating postoperative pain but to date no systematic review of the effectiveness of naproxen/naproxen sodium at different doses has been published. Objectives To assess the efficacy, safety and duration of action of a single oral dose of naproxen or naproxen sodium for acute postoperative pain in adults. Search strategy We searched The Cochrane Library, MEDLINE, EMBASE and the Oxford Pain Relief Database for relevant studies. Additional studies were identified from the reference list of retrieved reports. The most recent search was undertaken in July 2004. Selection criteria Included studies were randomised, double blind, placebo-controlled trials of a single dose of orally administered naproxen or naproxen sodium in adults with moderate to severe acute postoperative pain. Data collection and analysis Pain relief or pain intensity data were extracted and converted into dichotomous information to give the number of patients with at least 50% pain relief over four to six hours. Relative risk estimates (RR) and the number-needed-to-treat (NNT) for at least 50% pain relief were then calculated. Information was sought on the percentage of patients experiencing any adverse event, and the number-needed-to-harm was derived. Time to remedication was also estimated. Main results Ten trials (996 patients) met the inclusion criteria: nine assessed naproxen sodium; one combined the results from two small trials of naproxen alone. Included studies scored well for methodological quality. Meta-analysis of six trials (500

  18. Novel fentanyl-based dual μ/δ-opioid agonists for the treatment of acute and chronic pain

    PubMed Central

    Podolsky, Alexander T.; Sandweiss, Alexander; Hu, Jackie; Bilsky, Edward J; Cain, Jim P; Kumirov, Vlad K.; Lee, Yeon Sun; Hruby, Victor J; Vardanyan, Ruben S.; Vanderah, Todd W.

    2014-01-01

    Approximately one third of the adult U.S. population suffers from some type of on-going, chronic pain annually, and many more will have some type of acute pain associated with trauma or surgery. First-line therapies for moderate to severe pain include prescriptions for common mu opioid receptor agonists such as morphine and its various derivatives. The epidemic use, misuse and diversion of prescription opioids has highlighted just one of the adverse effects of mu opioid analgesics. Alternative approaches include novel opioids that target delta or kappa opioid receptors, or compounds that interact with two or more of the opioid receptors. Aims Here we report the pharmacology of a newly synthesized bifunctional opioid agonist (RV-Jim-C3) derived from combined structures of fentanyl and enkephalin in rodents. RV-Jim-C3 has high affinity binding to both mu and delta opioid receptors. Main Methods Mice and rats were used to test RV-Jim-C3 in a tailflick test with and without opioid selective antagonist for antinociception. RV-Jim-C3 was tested for anti-inflammatory and antihypersensitivity effects in a model of formalin-induced flinching and spinal nerve ligation. To rule out motor impairment, rotarod was tested in rats. Key findings RV-Jim-C3 demonstrates potent-efficacious activity in several in vivo pain models including inflammatory pain, antihyperalgesia and antiallodynic with no significant motor impairment. Significance This is the first report of a fentanyl-based structure with delta and mu opioid receptor activity that exhibits outstanding antinociceptive efficacy in neuropathic pain, reducing the propensity of unwanted side effects driven by current therapies that are unifunctional mu opioid agonists. PMID:24084045

  19. Acute abdominal pain in patients with lassa fever: Radiological assessment and diagnostic challenges

    PubMed Central

    Eze, Kenneth C.; Salami, Taofeek A.; Kpolugbo, James U.

    2014-01-01

    Background: To highlight the problems of diagnosis and management of acute abdomen in patients with lassa fever. And to also highlight the need for high index of suspicion of lassa fever in patients presenting with acute abdominal pain in order to avoid surgical intervention with unfavourable prognosis and nosocomial transmission of infections, especially in Lassa fever-endemic regions. Materials and Methods: A review of experiences of the authors in the management of lassa fever over a 4-year period (2004-2008). Literature on lassa fever, available in the internet and other local sources, was studied in November 2010 and reviewed. Results: Normal plain chest radiographic picture can change rapidly due to pulmonary oedema, pulmonary haemorrhage and acute respiratory distress syndrome. Plain abdominal radiograph may show dilated bowels with signs of paralytic ileus or dynamic intestinal obstruction due to bowel wall haemorrhage or inflamed and enlarged Peyer's patches. Ultrasound may show free intra-peritoneal fluid due to peritonitis and intra-peritoneal haemorrhage. Bleeding into the gall bladder wall may erroneously suggest infective cholecystitis. Pericardial effusion with or without pericarditis causing abdominal pain may be seen using echocardiography. High index of suspicion, antibody testing for lassa fever and viral isolation in a reference laboratory are critical for accurate diagnosis. Conclusion: Patients from lassa fever-endemic regions may present with features that suggest acute abdomen. Radiological studies may show findings that suggest acute abdomen but these should be interpreted in the light of the general clinical condition of the patient. It is necessary to know that acute abdominal pain and vomiting in lassa fever-endemic areas could be caused by lassa fever, which is a medical condition. Surgical option should be undertaken with restraint as it increases the morbidity, may worsen the prognosis and increase the risk of nosocomial transmission

  20. Pain referral and regional deep tissue hyperalgesia in experimental human hip pain models.

    PubMed

    Izumi, Masashi; Petersen, Kristian Kjær; Arendt-Nielsen, Lars; Graven-Nielsen, Thomas

    2014-04-01

    Hip disorder patients typically present with extensive pain referral and hyperalgesia. To better understand underlying mechanisms, an experimental hip pain model was established in which pain referrals and hyperalgesia could be studied under standardized conditions. In 16 healthy subjects, pain was induced by hypertonic saline injection into the gluteus medius tendon (GMT), adductor longus tendon (ALT), or gluteus medius muscle (GMM). Isotonic saline was injected contralaterally as control. Pain intensity was assessed on a visual analogue scale (VAS), and subjects mapped the pain distribution. Before, during, and after injections, passive hip joint pain provocation tests were completed, together with quantitative sensory testing as follows: pressure pain thresholds (PPTs), cuff algometry pain thresholds (cuff PPTs), cutaneous pin-prick sensitivity, and thermal pain thresholds. Hypertonic saline injected into the GMT resulted in higher VAS scores than hypertonic injections into the ALT and GMM (P<.05). Referred pain areas spread to larger parts of the leg after GMT and GMM injections compared with more regionalized pain pattern after ALT injections (P<.05). PPTs at the injection site were decreased after hypertonic saline injections into GMT and GMM compared with baseline, ALT injections, and isotonic saline. Cuff PPTs from the thigh were decreased after hypertonic saline injections into the ALT compared with baseline, GMT injections, and isotonic saline (P<.05). More subjects had positive joint pain provocation tests after hypertonic compared with isotonic saline injections (P<.05), indicating that this provocation test also assessed hyperalgesia in extra-articular soft tissues. The experimental models may open for better understanding of pain mechanisms associated with painful hip disorders. PMID:24447510

  1. Stability of conditioned pain modulation in two musculoskeletal pain models: investigating the influence of shoulder pain intensity and gender

    PubMed Central

    2013-01-01

    Background Several chronic pain populations have demonstrated decreased conditioned pain modulation (CPM). However there is still a need to investigate the stability of CPM paradigms before the measure can be recommended for implementation. The purpose of the present study was to assess whether shoulder pain intensity and gender influence CPM stability within and between sessions. Methods This study examined two different musculoskeletal pain models, clinical shoulder pain and an experimental model of shoulder pain induced with eccentric exercise in healthy participants. Patients in the clinical cohort (N = 134) were tested before surgery and reassessed 3 months post-surgery. The healthy cohort (N = 190) was examined before inducing pain at the shoulder, and 48 and 96 hours later. Results Our results provide evidence that 1) stability of inhibition is not related to changes in pain intensity, and 2) there are sex differences for CPM stability within and between days. Conclusions Fluctuation of pain intensity did not significantly influence CPM stability. Overall, the more stable situations for CPM were females from the clinical cohort and males from the healthy cohort. PMID:23758907

  2. Acute chest pain in a patient treated with capecitabine.

    PubMed

    Camaro, C; Danse, P W; Bosker, H A

    2009-08-01

    A 61-year-old male with a history of metastatic colorectal cancer was referred to our hospital for primary coronary intervention because of acute ST-elevation myocardial infarction. Coronary angiography, however, revealed no significant stenoses. When asked, the patient revealed that capecitabine (Xeloda(R)) was started by his oncologist one day before admission. It is known that this oral 5-FU analogue drug, used in metastatic colorectal cancer, can cause coronary artery spasms. The main treatment of capecitabine-induced vasospasm is discontinuation of the drug. Indeed, after cessation of the drug the patient remained free of symptoms and the ECG abnormalities normalised. (Neth Heart J 2009;17:288-91.). PMID:19789697

  3. Preoperative preemptive drug administration for acute postoperative pain: A systematic review and meta-analysis.

    PubMed

    Nir, R-R; Nahman-Averbuch, H; Moont, R; Sprecher, E; Yarnitsky, D

    2016-08-01

    Preoperative administration of pharmacological substances, such as non-steroidal anti-inflammatory drugs or opioids, has been gaining acclaim as a preemptive measure to minimize postoperative pain. This systematic review and meta-analysis aimed at evaluating the effectiveness of this approach in adults undergoing surgical procedures. MEDLINE, EMBASE and the Cochrane Central Register were searched from inception through January 2015. Data from randomized placebo-controlled trials were screened, extracted and assessed for risk of bias according to The Cochrane Collaboration's Tool by two independent authors. The primary outcome measure was reduction in postoperative analgesic consumption during 24 h post surgery; effects were described as mean differences between the drug and placebo arms with corresponding 95% confidence intervals (CIs) and were pooled using random-effects models. Potential publication bias was tested using funnel plots and Egger's regression test for funnel plot asymmetry. Screened were 511 records, of which 39 were included in the final synthesis with data from 3172 patients. A significant reduction in postoperative analgesic consumption was observed using preoperative administration of non-steroidal anti-inflammatory drugs (NSAIDs; 95% CI, -0.61 to -0.14; 31 comparisons), chiefly by the COX-2 inhibitors class (95% CI, -0.95 to -0.33; 13 comparisons). Significant reduction was also observed for gabapentin (95% CI, -1.60 to -0.38; 6 comparisons). No significant effects were observed using opioids, propionic acids or oxicam derivatives. WHAT DOES THIS REVIEW ADD?: Current analyses endorse the effectiveness of COX-2 inhibitors and gabapentin in reducing acute postoperative pain when administered preemptively presurgery. Such corroboration is not found for opioids and other NSAID classes. PMID:26991963

  4. Diclofenac Sodium Bolus Injection (Dyloject(TM)): A Review in Acute Pain Management.

    PubMed

    Hoy, Sheridan M

    2016-08-01

    An intravenous bolus formulation of the non-steroidal anti-inflammatory drug diclofenac sodium has been developed using hydroxypropyl-β-cyclodextrin (HPβCD) as a solubility enhancer. HPβCD diclofenac (Dyloject(TM)) is available for use in adults in the USA for the management of mild to moderate pain, and as monotherapy or in combination with opioid analgesics for the management of moderate to severe pain. In two multicentre, phase III studies in adults with acute moderate to severe postoperative pain, HPβCD diclofenac significantly reduced pain intensity and the need for rescue medication compared with placebo. In these studies, the tolerability profile of HPβCD diclofenac was generally similar to that of placebo and adverse events were mostly mild to moderate in severity. Constipation, infusion-site pain and dizziness were the most frequently reported adverse reactions occurring numerically more frequently with HPβCD diclofenac than placebo. Therapy with HPβCD diclofenac does not appear to be associated with an increased risk of cardiovascular, renal or bleeding-related adverse events versus placebo. Thus, HPβCD diclofenac extends the treatment options currently available for the management of moderate to severe postoperative pain in adults. PMID:27447189

  5. Intradermal Therapy (Mesotherapy) for the Treatment of Acute Pain in Carpal Tunnel Syndrome: A Preliminary Study

    PubMed Central

    Conforti, Giorgio; Capone, Loredana

    2014-01-01

    Background The carpal tunnel syndrome (CTS) is the most common cause of severe hand pain. In this study we treated acute pain in CTS patients by means of local intradermal injections of anti-inflammatory drugs (mesotherapy). Methods In twenty-five patients (forty-five hands), CTS diagnosis was confirmed by clinical and neurophysiological examination prior to mesotherapy. A mixture containing lidocaine 10 mg, ketoprophen lysine-acetylsalycilate 80 mg, xantinol nicotinate 100 mg, cyanocobalamine 1,000 mcg plus injectable water was used. Sites of injection were three parallel lines above the transverse carpal ligament and two v-shaped lines, one at the base of the thenar eminence, and the other at the base of the hypothenar eminence. Results The day after the treatment, all but four patients reported a significant reduction in pain and paresthesias. After 12 months, 17 patients had a complete pain relief, eight patients reported recurrence of pain and sensory symptoms and four out of them underwent surgical treatment. Conclusions With the obvious limits of a small-size open-label study, our results suggest that mesotherapy can temporary relieve pain and paresthesias in most CTS patients and in some cases its effect seems to be long-lasting. Further controlled studies are needed to confirm our preliminary findings and to compare mesotherapy to conventional approaches for the treatment of CTS. PMID:24478901

  6. Premedication With Oral Pregabalin for the Prevention of Acute Postsurgical Pain in Coronary Artery Bypass Surgery

    PubMed Central

    Ziyaeifard, Mohsen; Mehrabanian, Mohammad Javad; Faritus, Seyedeh Zahra; Khazaei Koohpar, Mehrdad; Ferasatkish, Rasool; Hosseinnejad, Heidar; Mehrabanian, Mohammadreza

    2015-01-01

    Background: For coronary artery bypass grafting (CABG) sternotomy should be performed. The pain after surgery is severe and requires medical intervention. Use of the analgesics is limited by their side effects and studies suggest that prevention with some medications before surgery is effective in controlling the postoperative pain. Objectives: We investigated the efficacy of pregabalin administration before surgery in the treatment of acute postoperative pain after CABG surgery. Patients and Methods: Sixty patients indicated for elective CABG surgery were randomly allocated to two groups. One group received placebo and the other received 150 mg of oral pregabalin before surgery. Heart rates, blood pressure, respiratory rate, intensive care unit (ICU) stay duration, morphine consumption, and pain score according to the visual analog scale (VAS) were measured and recorded at 4, 12, and 24 hours of surgery. Results: Pregabalin consumption did not alter hemodynamic parameters and was safe in patients after CABG. Its consumption was associated with significant reduction in the pain score (P values were 0.035, 0.026, and 0.047 respectively at 4, 12, and 24 hours of surgery). Its use was not associated with changes in the morphine consumption at 4, 12, and 24 hours of surgery (P > 0.05). Conclusions: Premedication with studied dose of pregabalin is effective for the prevention of postoperative pain in patients after CABG and has no adverse effects. Trials with other treating schedule and doses of the drug should be performed to determine the best treatment plan. PMID:25830118

  7. National Heart Attack Alert Program position paper: chest pain centers and programs for the evaluation of acute cardiac ischemia.

    PubMed

    Zalenski, R J; Selker, H P; Cannon, C P; Farin, H M; Gibler, W B; Goldberg, R J; Lambrew, C T; Ornato, J P; Rydman, R J; Steele, P

    2000-05-01

    The National Heart Attack Alert Program (NHAAP), which is coordinated by the National Heart, Lung, and Blood Institute (NHLBI), promotes the early detection and optimal treatment of patients with acute myocardial infarction and other acute coronary ischemic syndromes. The NHAAP, having observed the development and growth of chest pain centers in emergency departments with special interest, created a task force to evaluate such centers and make recommendations pertaining to the management of patients with acute cardiac ischemia. This position paper offers recommendations to assist emergency physicians in EDs, including those with chest pain centers, in providing comprehensive care for patients with acute cardiac ischemia. PMID:10783408

  8. Eugenol reduces acute pain in mice by modulating the glutamatergic and tumor necrosis factor alpha (TNF-α) pathways.

    PubMed

    Dal Bó, Wladmir; Luiz, Ana Paula; Martins, Daniel F; Mazzardo-Martins, Leidiane; Santos, Adair R S

    2013-10-01

    Eugenol is utilized together with zinc oxide in odontological clinical for the cementation of temporary prostheses and the temporary restoration of teeth and cavities. This work explored the antinociceptive effects of the eugenol in different models of acute pain in mice and investigated its possible modulation of the inhibitory (opioid) and excitatory (glutamatergic and pro-inflammatory cytokines) pathways of nociceptive signaling. The administration of eugenol (3-300 mg/kg, p.o., 60 min or i.p., 30 min) inhibited 82 ± 10% and 90 ± 6% of the acetic acid-induced nociception, with ID₅₀ values of 51.3 and 50.2 mg/kg, respectively. In the glutamate test, eugenol (0.3-100 mg/kg, i.p.) reduced the response behavior by 62 ± 5% with an ID₅₀ of 5.6 mg/kg. In addition, the antinociceptive effect of eugenol (10 mg/kg, i.p.) in the glutamate test was prevented by the i.p. treatment for mice with naloxone. The pretreatment of mice with eugenol (10 mg/kg, i.p.) was able to inhibit the nociception induced by the intrathecal (i.t.) injection of glutamate (37 ± 9%), kainic (acid kainite) (41 ± 12%), α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) (55 ± 5%), and substance P (SP) (39 ± 8%). Furthermore, eugenol (10 mg/kg, i.p.) also inhibited biting induced by tumor necrosis factor alpha (TNF-α, 65 ± 8%). These results extend our current knowledge of eugenol and confirm that it promotes significant antinociception against different mouse models of acute pain. The mechanism of action appears to involve the modulation of the opioid system and glutamatergic receptors (i.e., kainate and AMPA), and the inhibition of TNF-α. Thus, eugenol could represent an important compound in the treatment for acute pain. PMID:22775297

  9. TRPV1 and TRPA1 antagonists prevent the transition of acute to chronic inflammation and pain in chronic pancreatitis

    PubMed Central

    Schwartz, Erica S.; La, Jun-Ho; Scheff, Nicole N.; Davis, Brian M.; Albers, Kathryn M.; Gebhart, G.F.

    2013-01-01

    Visceral afferents expressing transient receptor potential channels TRPV1 and TRPA1 are thought to be required for neurogenic inflammation and development of inflammatory hyperalgesia. In a mouse model of chronic pancreatitis (CP) produced by repeated episodes (twice/wk) of caerulein-induced acute pancreatitis (AP), we studied involvement of these TRP channels in pancreatic inflammation and pain-related behaviors. Antagonists of the two TRP channels were administered at different times to block the neurogenic component of AP. Six bouts of AP (over 3 wks) increased pancreatic inflammation and pain-related behaviors, produced fibrosis, sprouting of pancreatic nerve fibers and increased TRPA1 and TRPV1 gene transcripts and a nociceptive marker, pERK, in pancreas afferent somata. Treatment with TRP antagonists, when initiated prior to week 3, decreased pancreatic inflammation and pain-related behaviors and also blocked development of histopathological changes in the pancreas and upregulation of TRPV1, TRPA1 and pERK in pancreatic afferents. Continued treatment with TRP antagonists blocked development of CP and pain behaviors even when mice were challenged with seven more weeks of twice/wk caerulein. When started after week 3, however, treatment with TRP antagonists was ineffective in blocking the transition from AP to CP and the emergence of pain behaviors. These results suggest 1) an important role for neurogenic inflammation in pancreatitis and pain-related behaviors, 2) there is transition from AP to CP, after which TRP channel antagonism is ineffective, and thus 3) that early intervention with TRP channel antagonists may effectively attenuate the transition to and development of CP. PMID:23536075

  10. [New model of acute pancreatitis].

    PubMed

    Cherkezova-Kinova, E; Lateva, E

    1981-01-01

    The authors propose a new model of acute pancreatitis by infusing duodenal content, obtained both from animals with experimental pancreatitis and from patients with pancreatitis, hepatitis and cholecystitis, into the duodenum of experimental animals without pressure for a period of several days. Pancreatitis was established functionally and histomorphologically. The control group of animals did not reveal deviations from the norm after infusion of duodenal content. The authors suggested the presence of pathogenic substances in the duodenal content of animals and sick persons, and these components damaged the pancreas, liver and kidneys by means of blood and lymph ways. PMID:7227280

  11. Interacting Effects of Trait Anger and Acute Anger Arousal on Pain: The Role of Endogenous Opioids

    PubMed Central

    Bruehl, Stephen; Burns, John W.; Chung, Ok Yung; Chont, Melissa

    2011-01-01

    Objective Elevated trait anger (TRANG; heightened propensity to experience anger) is associated with greater pain responsiveness, possibly via associations with deficient endogenous opioid analgesia. This study tested whether acute anger arousal moderates the impact of TRANG on endogenous opioid analgesia. Methods 94 chronic low back pain participants (LBP) and 85 healthy controls received opioid blockade (8mg naloxone) or placebo in randomized, counterbalanced order in separate sessions. Participants were randomly assigned to undergo either a 5-minute anger recall interview (ARI) or neutral control interview (NCI) across both drug conditions. Immediately following the assigned interview, participants engaged sequentially in finger pressure and ischemic forearm pain tasks. Opioid blockade effects were derived (blockade minus placebo condition pain ratings) to index opioid antinociceptive function. Results Placebo condition TRANG × Interview interactions (p’s<.05) indicated that TRANG was hyperalgesic only in the context of acute anger arousal (ARI condition; p’s<.05). Blockade effect analyses suggested these hyperalgesic effects were related to deficient opioid analgesia. Significant TRANG × Interview interactions (p’s<.05) for both pain tasks indicated that elevated TRANG was associated with smaller blockade effects (less endogenous opioid analgesia) only in the ARI condition (p’s<.05). Results for ischemic task VAS intensity blockade effects suggested that associations between TRANG and impaired opioid function were most evident in LBP participants when experiencing anger (Type × Interview × TRANG Interaction; p<.05). Conclusions Results indicate that hyperalgesic effects of TRANG are most prominent when acute anger is aroused, and suggest that endogenous opioid mechanisms contribute. PMID:21862829

  12. Validation and properties of the verbal numeric scale in children with acute pain.

    PubMed

    Bailey, Benoit; Daoust, Raoul; Doyon-Trottier, Evelyne; Dauphin-Pierre, Sabine; Gravel, Jocelyn

    2010-05-01

    Although the verbal numeric scale (VNS) is used frequently at patients' bedsides, it has never been formally validated in children with acute pain. In order to validate this scale, a prospective cohort study was performed in children between 8 and 17years presenting to a pediatric emergency department (ED) with acute pain. Pain was graded using the VNS, the visual analogue scale (VAS), and the verbal rating scale (VRS). A second assessment was done before discharge. We determined a priori that in order to be valid, the VNS would need to: correlate with the VAS (concurrent validity); decrease after intervention to reduce pain (construct validity); and be associated with the VRS categories (content validity). The VNS interchangeability with the VAS, its minimal clinically significant difference, and test-retest reliability were also determined. A total of 202 patients (mean age: 12.2+/-2.6years) were enrolled. The VNS correlated with the VAS: r(ic)=0.93, p<0.001. There were differences in the VNS before versus after interventions (p<0.001), and between VRS categories (mild versus moderate, p<0.001; moderate versus severe, p<0.001). The 95% limits of agreement (interchangeability) between VNS/VAS were outside the a priori set limit of +/-2.0: -1.8, 2.5. The VNS minimal clinically significant difference was 1. The VNS had good test-retest reliability with 95% limits of agreement of -0.9 and 1.2. In conclusion, the VNS provides a valid and reliable scale to evaluate acute pain in children aged 8-17years but is not interchangeable with the VAS. PMID:20188471

  13. Acute Hepatitis after Ingestion of a Preparation of Chinese Skullcap and Black Catechu for Joint Pain

    PubMed Central

    Papafragkakis, Charilaos; Ona, Mel A.; Reddy, Madhavi; Anand, Sury

    2016-01-01

    Many herbal preparations are routinely used and have been occasionally associated with a wide range of side effects, from mild to severe. Chinese skullcap and black catechu are herbal medications commonly used for their hepatoprotective and other properties. We report a case of acute toxic hepatitis associated with ingestion of Chinese skullcap and black catechu in one preparation for the alleviation of joint pain. PMID:27144042

  14. Using the Horse Grimace Scale (HGS) to Assess Pain Associated with Acute Laminitis in Horses (Equus caballus)

    PubMed Central

    Dalla Costa, Emanuela; Stucke, Diana; Dai, Francesca; Minero, Michela; Leach, Matthew C.; Lebelt, Dirk

    2016-01-01

    Simple Summary Acute laminitis is a common equine disease characterized by intense foot pain. This work aimed to investigate whether the Horse Grimace Scale (HGS), a facial-expression-based pain coding system, can be usefully applied to assess pain associated with acute laminitis in horses at rest. Ten horses, referred as acute laminitis cases with no prior treatment, were assessed at the admission and at seven days after the initial evaluation and treatment. The authors found that the Horse Grimace Scale is a potentially effective method to assess pain associated with acute laminitis in horses at rest, as horses showing high HGS scores also exhibited higher Obel scores, and veterinarians classified them in a more severe painful state. Abstract Acute laminitis is a common equine disease characterized by intense foot pain, both acutely and chronically. The Obel grading system is the most widely accepted method for describing the severity of laminitis by equine practitioners, however this method requires movement (walk and trot) of the horse, causing further intense pain. The recently developed Horse Grimace Scale (HGS), a facial-expression-based pain coding system, may offer a more effective means of assessing the pain associated with acute laminitis. The aims of this study were: to investigate whether HGS can be usefully applied to assess pain associated with acute laminitis in horses at rest, and to examine if scoring HGS using videos produced similar results as those obtained from still images. Ten horses, referred as acute laminitis cases with no prior treatment, were included in the study. Each horse was assessed using the Obel and HGS (from images and videos) scales: at the admission (before any treatment) and at seven days after the initial evaluation and treatment. The results of this study suggest that HGS is a potentially effective method to assess pain associated with acute laminitis in horses at rest, as horses showing high HGS scores also exhibited

  15. Single dose oral ketoprofen and dexketoprofen for acute postoperative pain in adults

    PubMed Central

    Barden, Jodie; Derry, Sheena; McQuay, Henry J; Moore, R Andrew

    2014-01-01

    Background Ketoprofen is a non-selective non-steroidal anti-inflammatory drug (NSAID) used to treat acute and chronic painful conditions. Dexketoprofen is the (S)-enantiomer, which is believed to confer analgesia. Theoretically dexketoprofen is expected to provide equivalent analgesia to ketoprofen at half the dose, with a consequent reduction in gastrointestinal adverse events. Objectives To assess efficacy, duration of action, and associated adverse events of single dose oral ketoprofen and dexketoprofen in acute postoperative pain in adults. Search methods We searched Cochrane CENTRAL, MEDLINE, EMBASE and the Oxford Pain Relief Database for studies to August 2009. Selection criteria Randomised, double blind, placebo-controlled trials of single dose orally administered ketoprofen and dexketoprofen in adults with moderate to severe acute postoperative pain. Data collection and analysis Two review authors independently assessed trial quality and extracted data. Pain relief or pain intensity data were extracted and converted into the dichotomous outcome of number of participants with at least 50% pain relief over 4 to 6 hours, from which relative risk and number-needed-to-treat-to-benefit (NNT) were calculated. Numbers of participants using rescue medication over specified time periods, and time to use of rescue medication, were sought as additional measures of efficacy. Information on adverse events and withdrawals was collected. Main results Fourteen studies compared ketoprofen (968 participants) at mainly 25 mg and 50 mg with placebo (520 participants). Seven studies compared dexketoprofen (681 participants) at mainly 10 mg to 25 mg with placebo (289 participants). Studies were of adequate reporting quality, and participants had pain following dental, orthopaedic, obstetric, gynaecological and general surgery. There was considerable clinical heterogeneity between studies in dental and other types of surgery, particularly bunionectomy, which limited analysis

  16. TRPA1 channels mediate acute neurogenic inflammation and pain produced by bacterial endotoxins

    NASA Astrophysics Data System (ADS)

    Meseguer, Victor; Alpizar, Yeranddy A.; Luis, Enoch; Tajada, Sendoa; Denlinger, Bristol; Fajardo, Otto; Manenschijn, Jan-Albert; Fernández-Peña, Carlos; Talavera, Arturo; Kichko, Tatiana; Navia, Belén; Sánchez, Alicia; Señarís, Rosa; Reeh, Peter; Pérez-García, María Teresa; López-López, José Ramón; Voets, Thomas; Belmonte, Carlos; Talavera, Karel; Viana, Félix

    2014-01-01

    Gram-negative bacterial infections are accompanied by inflammation and somatic or visceral pain. These symptoms are generally attributed to sensitization of nociceptors by inflammatory mediators released by immune cells. Nociceptor sensitization during inflammation occurs through activation of the Toll-like receptor 4 (TLR4) signalling pathway by lipopolysaccharide (LPS), a toxic by-product of bacterial lysis. Here we show that LPS exerts fast, membrane delimited, excitatory actions via TRPA1, a transient receptor potential cation channel that is critical for transducing environmental irritant stimuli into nociceptor activity. Moreover, we find that pain and acute vascular reactions, including neurogenic inflammation (CGRP release) caused by LPS are primarily dependent on TRPA1 channel activation in nociceptive sensory neurons, and develop independently of TLR4 activation. The identification of TRPA1 as a molecular determinant of direct LPS effects on nociceptors offers new insights into the pathogenesis of pain and neurovascular responses during bacterial infections and opens novel avenues for their treatment.

  17. Preventive Analgesic Efficacy of Nefopam in Acute and Chronic Pain After Breast Cancer Surgery

    PubMed Central

    Na, Hyo-Seok; Oh, Ah-Young; Koo, Bon-Wook; Lim, Dae-Jin; Ryu, Jung-Hee; Han, Ji-Won

    2016-01-01

    Abstract Breast cancer surgery is known to cause severe acute postoperative pain, which can persist for a long time. We administered nefopam preventively to patients undergoing lumpectomy with axillary lymph node dissection or sentinel lymph node biopsy, and evaluated its efficacy on acute and chronic postoperative pain. Enrolled patients were assigned to the nefopam (n = 41) or the control (n = 42) group. Before initiating the operation, 20 mg of nefopam was given to the patients of the nefopam group, and normal saline was used in the control group. Ketorolac was given at the end of surgery, and meloxicam was prescribed in the postoperative period to all patients in both groups. Pain was assessed using a numerical rating scale (NRS), and the rescue analgesic drug was given when the NRS was >5. Implementation of postoperative chemotherapy, radiotherapy (RT), or hormone therapy was evaluated. The NRS of postoperative pain was significantly lower in the nefopam than in the control group in the postanesthetic care unit (4.5 ± 2.2 vs 5.7 ± 1.5, respectively; P = 0.01), at postoperative 6 h (3.0 ± 1.6 vs 4.5 ± 1.3, respectively; P < 0.001), and at postoperative 24 h (3.1 ± 1.1 vs 3.8 ± 1.5, respectively; P = 0.01) with reduced use of rescue analgesic drugs. Significantly fewer patients suffered from chronic postoperative pain in the nefopam than in the control group at postoperative 3 months (36.6% vs 59.5%, P = 0.04). Considering only the cohort without postoperative adjuvant RT, the difference in the proportion of patients reporting chronic pain increased (23.5% in the nefopam group vs 61.5% in the control group, P = 0.04). Preventive nefopam was helpful in reducing the acute postoperative pain, with reduced use of rescue analgesic drugs, and it contributed to reduced occurrence of chronic pain at postoperative 3 months after breast cancer surgery. PMID:27196485

  18. Assessing efficacy of non-opioid analgesics in experimental pain models in healthy volunteers: an updated review

    PubMed Central

    Staahl, Camilla; Olesen, Anne Estrup; Andresen, Trine; Arendt-Nielsen, Lars; Drewes, Asbjørn Mohr

    2009-01-01

    AIM Experimental pain models may help to evaluate the mechanisms of analgesics and target the clinical indications for their use. This review, the second in a series of two, addresses how the efficacy of non-opioid analgesics have been assessed in human volunteers using experimental pain models. METHODS A literature search was completed for randomized controlled studies that included human experimental pain models, healthy volunteers and non-opioid analgesics. RESULTS Nonsteroidal anti-inflammatory drugs worked against various types of acute pain as well as in hyperalgesia. Analgesia from paracetamol was difficult to detect in experimental pain and the pain needed to be assessed with very sensitive methods like evoked brain potentials. The N-methyl-D-aspartate antagonists exemplified by ketamine generally needed strong, long-lasting or repeated pain in the skin for detectable analgesia, whereas pain in muscle and viscera generally was more easily attenuated. Gabapentin worked well in several models, particularly those inducing hyperalgesia, whereas lamotrigine was weak in modulation of experimental pain. Imipramine attenuated pain in most experimental models, whereas amitriptyline had weaker effects. Delta-9-tetrahydrocannabinol attenuated pain in only a few models. CONCLUSIONS Pain induction and assessment are very important for the sensitivity of the pain models. Generally, experimental pain models need to be designed with careful consideration of the pharmacological mechanisms and pharmacokinetics of analgesics. The drawback with the different study designs is also discussed. This knowledge can aid the decisions that need to be taken when designing experimental pain studies for compounds entering Phase I and II trials. PMID:19740390

  19. Enhanced cortisol increase upon awakening is associated with greater pain ratings but not salivary cortisol or soluble tumor necrosis factor-α receptor II responses to acute pain

    PubMed Central

    Goodin, Burel R.; Quinn, Noel B.; King, Christopher D.; Page, Gayle G.; Haythornthwaite, Jennifer A.; Edwards, Robert R.; Stapleton, Laura M.; McGuire, Lynanne

    2011-01-01

    Objectives The cortisol awakening response (CAR) is related with psychosocial factors and health in potentially significant ways, suggesting that it may be a distinctive marker of hypothalamic-pituitary-adrenal (HPA) axis function and dysfunction. This sought to expand upon previous work that examined the association between CAR and ratings of laboratory-evoked acute pain stimulation. In addition to evoked pain ratings, this study also tested whether CAR was prospectively related with salivary cortisol and soluble tumor necrosis factor-α receptor II (sTNFαRII) responses to acute pain stimulation. Methods This study included 36 healthy, pain-free volunteers of both sexes recruited via posted study flyers. Prior to completion of laboratory pain testing, salivary cortisol samples were obtained at home over the course of a single morning according to the following time frame: upon awakening, and 15, 30, and 60 min after awakening. Following collection of saliva, study participants brought their home saliva samples to the laboratory for assay and subsequently completed acute experimental pain testing procedures. Results Cluster analysis of CAR revealed two distinct groups with similar patterns of cortisol response to awakening; increased and flattened. Relative to flattened CAR, increased CAR was associated with greater ratings of pain intensity and unpleasantness. Salivary cortisol was significantly increased and sTNFαRII significantly decreased following pain testing, but neither of these responses differed as a function of increased versus flattened CAR. Discussion CAR may be a marker for stress sensitivity and/or the anticipation of impending stress, which could explain why the increased CAR cohort reported greater acute pain ratings. PMID:21904196

  20. Assessment of patient satisfaction with acute pain management service: Monitoring quality of care in clinical setting

    PubMed Central

    Farooq, Fizzah; Khan, Robyna; Ahmed, Aliya

    2016-01-01

    Background and Aims: Assessment of patient satisfaction is an important tool for monitoring the quality of care in hospitals. The aim of this survey was to develop a reliable tool to assess patient satisfaction with acute pain management service (APMS) and identify variables affecting this so that care can be improved. Methods: A questionnaire was developed and administered to patients after being discharged from APMS care by an unbiased person. Data collected from record included patient demographics, surgical procedure, analgesic modality, co-analgesics and dynamic and static pain scores. Questions included pain expected and pain experienced, APMS response time, quality of pain relief with treatment, professionalism of APMS team, overall experience of pain relief and choosing/suggesting same modality for themselves/family/friends again. Five-point Likert scale was used for most of the options. Statistical analysis was done using SPSS 19. Results: Frequency and percentages were computed for qualitative observation and presented on pie chart and histogram. Seventy-one per cent patients expected severe pain while 43% actually experienced it. About 79.4% would choose same analgesia modality in future for self/family/friends. Ninety-nine per cent found APMS staff courteous and professional. About 89% rated their experience of pain management as excellent to very good. Conclusion: The survey of patients’ satisfaction to monitor the quality of care provided by APMS provided positive inputs on its role. This also helps to identify areas requiring improvement in care and as a tool to gauge the quality of care. PMID:27141107

  1. Unusual cause of acute low-back pain: sudden annulus fibrosus rupture.

    PubMed

    Ozer, Ali Fahir; Oktenoglu, Tunc; Sasani, Mehdi; Kaner, Tuncay; Ercelen, Omur; Canbulat, Nazan

    2012-05-01

    Low-back pain is a common problem in neu-rosurgery practice, and an algorithm has been developed for assessing these cases. However, one subgroup of these patients shares several clinical features and these individuals are not easy to categorize and diagnose. We present our observations for 8 of these patients, individuals with low-back pain caused by atypical annulus fibrosus rupture (AAR). The aim of this study is to show the consequences of overlooked annular tears on acute onset of low back pain. Eight patients with acute-onset severe low-back pain were admitted. Physical examinations were normal and each individual was examined neurologically and assessed with neuroradiologic studies [plain x-rays, magnetic resonance imaging (MRI), discography and computed tomography (CT) discography]. AAR was ultimately diagnosed with provocative discography. In all cases, MRI showed a healthy disc or mild degeneration, whereas discography and CT discography demonstrated disc disease. Anterior interbody cage implantation was performed in 3 of the 8 cases and posterior dynamic stabilization was carried out in 3 cases. The other 2 individuals refused surgery, and we were informed that one of them developed disc herniation at the affected level 1 year after our diagnosis. Clinical and radiological outcomes were evaluated. In cases where AAR is suspected, MRI, discography, and CT discography should be performed in addition to routine neuroradiologic studies. PMID:22802990

  2. Nursing staff satisfaction with the acute pain service in a surgical ward setting.

    PubMed

    Gleeson, Erica; Carryer, Jenny

    2010-03-01

    Over the last 20 years significant advances in the management of pain have been made. Specifically, establishment during the 1990s of Acute Pain Services (APS) within hospitals both nationally and internationally resulted in improved awareness and management of pain. However there has been little research into staff satisfaction with the service, and no studies have been undertaken at a local hospital level. Nurses play a major role in the assessment and treatment of acute pain; therefore it is useful to determine the level of their satisfaction following introduction of APS. The purpose of the present study was to explore, by means of a survey, the level of nursing staff satisfaction with the APS in a large hospital in New Zealand (NZ). Questionnaires, predominantly quantitative in form, were distributed to 58 nursing staff who worked alongside the APS. Thirty six (62%) responded. The findings showed that while, overall, respondents were very satisfied, or satisfied with the APS, responses to open-ended section of the questionnaire brought to light areas that the researchers see as warranting further attention. PMID:20518440

  3. Assessment of thermal sensitivity in rats using the thermal place preference test: description and application in the study of oxaliplatin-induced acute thermal hypersensitivity and inflammatory pain models.

    PubMed

    Balayssac, David; Ling, Bing; Ferrier, Jérémy; Pereira, Bruno; Eschalier, Alain; Authier, Nicolas

    2014-04-01

    Thermal sensitivity is an essential characteristic of some painful states, including oxaliplatin-induced neuropathy. The thermal place preference test (TPPT) was designed to finely assess thermal sensitivity in rodents. The TPPT monitors the time spent by unrestrained rodents on a test plate at fixed temperatures (5-50°C) compared with an adjacent reference plate at a neutral temperature (25°C). Here, we report the results of a study designed (i) to validate the optimal methodological parameters for measuring thermal sensitivity in rats, (ii) to assess the thermal sensitivity of healthy rats and animal models of pain and (iii) to explore the pharmacological effects of analgesic drugs. The most reproducible conditions occurred when the TPPT was performed in the morning and in the dark for 3 min with the reference plate set to 25°C. The temperature preferences of healthy rats were more than 17°C and less than 40°C. When compared with control animals, oxaliplatin-treated rats showed thermal hypersensitivity at 12, 20 and 35°C, and carrageenan-treated rats showed thermal hypersensitivity at 15 and 45°C. Duloxetine (2.5 mg/kg, intraperitoneal) reversed oxaliplatin-induced cold hypersensitivity (20°C) and morphine (1 mg/kg, intravenous) reversed carrageenan-induced heat hypersensitivity (45°C). We conclude that the TPPT enables a fine-grained assessment of thermal sensitivity that is relevant to the pathophysiological exploration of animal pain models and to the pharmacological assessment of analgesic drugs. PMID:24525711

  4. Diagnostic importance of admission platelet volume indices in patients with acute chest pain suggesting acute coronary syndrome

    PubMed Central

    Dehghani, Mohammad Reza; Taghipour-Sani, Leila; Rezaei, Yousef; Rostami, Rahim

    2014-01-01

    Objective Acute coronary syndrome (ACS) is a challenging issue in cardiovascular medicine. Given platelet role in atherothrombosis, we sought to determine whether platelet indices can be used as diagnostic tests for patients who suffered from an acute chest discomfort. Methods We prospectively enrolled 862 patients with an acute chest pain and 184 healthy matched controls. They were divided into four groups: 184 controls, 249 of non-ACS, 421 of unstable angina (UA), and 192 of myocardial infarction (MI) cases. Blood samples were collected at admission to the emergency department for routine hematologic tests. Results The mean platelet volume (MPV), platelet distribution width (PDW), and platelet large cell ratio (P-LCR) were significantly greater in patients with MI compared with those of non-ACS or control subjects. Negative and significant correlations existed between MPV, PDW, and P-LCR values and platelet count (P < 0.001). Receiver operating characteristic (ROC) curves showed that the MPV, PDW, and P-LCR with cut-off values of 9.15 fL, 11.35 fL, and 20.25% and with area under the curves of 0.563, 0.557, and 0.560, respectively, detected MI patients among those who had chest discomfort. The sensitivities and specificities were found to be 72% and 40%, 73% and 37%, and 68% and 44% for MPV, PDW, and P-LCR, respectively. Conclusion An elevated admission MPV, PDW, and P-LCR may be of benefit to detect chest pain resulting in MI from that of non-cardiac one, and also for risk stratification of patients who suffered from an acute chest discomfort. PMID:25634396

  5. Surgical animal models of neuropathic pain: Pros and Cons.

    PubMed

    Challa, Siva Reddy

    2015-03-01

    One of the biggest challenges for discovering more efficacious drugs for the control of neuropathic pain has been the diversity of chronic pain states in humans. It is now acceptable that different mechanisms contribute to normal physiologic pain, pain arising from tissue damage and pain arising from injury to the nervous system. To study pain transmission, spot novel pain targets and characterize the potential analgesic profile of new chemical entities, numerous experimental animal pain models have been developed that attempt to simulate the many human pain conditions. Among the neuropathic pain models, surgical models have paramount importance in the induction of pain states. Many surgical animal models exist, like the chronic constriction injury (CCI) to the sciatic nerve, partial sciatic nerve ligation (pSNL), spinal nerve ligation (SNL), spared nerve injury (SNI), brachial plexus avulsion (BPA), sciatic nerve transaction (SNT) and sciatic nerve trisection. Most of these models induce responses similar to those found in causalgia, a syndrome of sustained burning pain often seen in the distal extremity after partial peripheral nerve injury in humans. Researchers most commonly use these surgical models in both rats and mice during drug discovery to screen new chemical entities for efficacy in the area of neuropathic pain. However, there is scant literature that provides a comparative discussion of all these surgical models. Each surgical model has its own benefits and limitations. It is very difficult for a researcher to choose a suitable surgical animal model to suit their experimental set-up. Therefore, particular attention has been given in this review to comparatively provide the pros and cons of each model of surgically induced neuropathic pain. PMID:24831263

  6. Social Modeling Influences on Pain Experience and Behaviour.

    ERIC Educational Resources Information Center

    Craig, Kenneth D.

    The impact of exposure to social models displaying variably tolerant pain behaviour on observers' expressions of pain is examined. Findings indicate substantial effects on verbal reports of pain, avoidance behaviour, psychophysiological indices, power function parameters, and sensory decision theory indices. Discussion centers on how social models…

  7. Validation of a New “Objective Pain Score” Vs. “Numeric Rating Scale” For the Evaluation of Acute Pain: A Comparative Study

    PubMed Central

    Tandon, Manish; Singh, Anshuman; Saluja, Vandana; Dhankhar, Mandeep; Pandey, Chandra Kant; Jain, Priyanka

    2016-01-01

    Background: Pain scores are used for acute pain management. The assessment of pain by the patient as well as the caregiver can be influenced by a variety of factors. The numeric rating scale (NRS) is widely used due to its easy application. The NRS requires abstract thinking by a patient to assign a score to correctly reflect analgesic needs, and its interpretation is subject to bias. Objectives: The study was done to validate a 4-point objective pain score (OPS) for the evaluation of acute postoperative pain and its comparison with the NRS. Patient and Methods: A total of 1021 paired readings of the OPS and NRS of 93 patients who underwent laparotomy and used patient-controlled analgesia were evaluated. Acute pain service (APS) personnel recorded the OPS and NRS. Rescue analgesia was divided into two incremental levels (level 1-paracetamol 1 g for NRS 2 - 5 and OPS 3, Level 2-Fentanyl 25 mcg for NRS ≥ 6 and OPS 1 and 2). In cases of disagreement between the two scores, an independent consultant decided the rescue analgesia. Results: The NRS and OPS agreed across the range of pain. There were 25 disagreements in 8 patients. On 24 occasions, rescue analgesia was increased from level 1 to 2, and one occasion it was decreased from level 2 to 1. On all 25 occasions, the decision to supplement analgesia went in favor of the OPS over the NRS. Besides these 25 disagreements, there were 17 occasions in which observer bias was possible for level 2 rescue analgesia. Conclusions: The OPS is a good stand-alone pain score and is better than the NRS for defining mild and moderate pain. It may even be used to supplement NRS when it is indicative of mild or moderate pain. PMID:27110530

  8. OPAL: a randomised, placebo-controlled trial of opioid analgesia for the reduction of pain severity in people with acute spinal pain. Trial protocol

    PubMed Central

    Lin, Chung-Wei Christine; McLachlan, Andrew J; Latimer, Jane; Day, Ric O; Billot, Laurent; Koes, Bart W; Maher, Chris G

    2016-01-01

    Introduction Low back pain and neck pain are extremely prevalent and are responsible for an enormous burden of disease globally. Strong analgesics, such as opioid analgesics, are recommended by clinical guidelines for people with acute low back pain or neck pain who are slow to recover and require more pain relief. Opioid analgesics are widely and increasingly used, but there are no strong efficacy data supporting the use of opioid analgesics for acute low back pain or neck pain. Concerns regarding opioid use are further heightened by the risks of adverse events, some of which can be serious (eg, dependency, misuse and overdose). Methods and analysis OPAL is a randomised, placebo-controlled, triple-blinded trial that will investigate the judicious use of an opioid analgesic in 346 participants with acute low back pain and/or neck pain who are slow to recover. Participants will be recruited from general practice and randomised to receive the opioid analgesic (controlled release oxycodone plus naloxone up to 20 mg per day) or placebo in addition to guideline-based care (eg, reassurance and advice of staying active) for up to 6 weeks. Participants will be followed-up for 3 months for effectiveness outcomes. The primary outcome will be pain severity. Secondary outcomes will include physical functioning and time to recovery. Medication-related adverse events will be assessed and a cost-effectiveness analysis will be conducted. We will additionally assess long-term use and risk of misuse of opioid analgesics for up to 12 months. Ethics and dissemination Ethical approval has been obtained. Trial results will be disseminated by publications and conference presentations, and via the media. Trial registration number ACTRN12615000775516: Pre-results. PMID:27558901

  9. Endoscopic Achilles tenolysis for management of heel cord pain after repair of acute rupture of Achilles tendon.

    PubMed

    Lui, Tun Hing

    2013-01-01

    Tendon pain after repair of an acute Achilles tendon rupture can result from suture granuloma formation, modification of the threshold of the pain receptors inside the tendon by scar tissue, expansion of the paratenon by tendon enlargement with secondary stimulation of mechanoreceptors, or underlying tendon degeneration. In the present technique report, an endoscopic technique of Achilles tenolysis for denervation and debulking is described that might be applicable in cases in which conservative treatment fails to alleviate the pain. PMID:23085384

  10. Comparison of Acute and Chronic Pain after Open Nephrectomy versus Laparoscopic Nephrectomy: A Prospective Clinical Trial.

    PubMed

    Alper, Isik; Yüksel, Esra

    2016-04-01

    We evaluated postoperative pain intensity and the incidence of chronic pain in patients with renal cell carcinoma undergoing laparoscopic or open radical nephrectomy.In this prospective study, 27 laparoscopic nephrectomy (Group LN) and 25 open nephrectomy (Group ON) patients were included. All patients received paracetamol infusion and intramuscular morphine 30 minutes before the end of the operation and intravenous patient controlled analgesia with morphine postoperatively. Data including patients' demographics, visual analog scale (VAS) pain scores at postoperative 0.5, 1, 2, 4, 6, 12, and 24 hours, postoperative morphine consumption, analgesic demand, analgesic delivery, number of patients requiring rescue analgesics, side effects because of analgesic medications, and overall patient satisfaction were recorded and compared between the two groups. Two and 6 months after the operation, patients were evaluated for chronic postsurgical pain (CPSP).Postoperative average VAS pain scores were not different between the two groups. However, only at 2 hours postoperatively, pain score was significantly higher in Group ON than in Group LN. In both groups, the highest pain scores were recorded at 30 minutes and 1 hour after surgery. Ninety-six percent of group ON patients and 88% of group LN patients required additional analgesia in the early postoperative period (P = 0.33). Postoperative morphine consumption and analgesic demand were found to be similar between the two groups. CPSP at 2 months after surgery was observed in 4 out of 25 patients (16%) in the ON group and 3 out of 27 patients (11.1%) in the LN group (P = 0.6). Chronic pain at 6 months after surgery was observed in 1 ON patient (4%) and 1 LN patient (3.7%, P = 0.9).This study demonstrated that postoperative acute pain scores were not different after laparoscopic or open nephrectomy and patients undergoing laparoscopic or open nephrectomy were at equal risk of developing CPSP. Pain control

  11. Comparison of Acute and Chronic Pain after Open Nephrectomy versus Laparoscopic Nephrectomy

    PubMed Central

    Alper, Isik; Yüksel, Esra

    2016-01-01

    Abstract We evaluated postoperative pain intensity and the incidence of chronic pain in patients with renal cell carcinoma undergoing laparoscopic or open radical nephrectomy. In this prospective study, 27 laparoscopic nephrectomy (Group LN) and 25 open nephrectomy (Group ON) patients were included. All patients received paracetamol infusion and intramuscular morphine 30 minutes before the end of the operation and intravenous patient controlled analgesia with morphine postoperatively. Data including patients’ demographics, visual analog scale (VAS) pain scores at postoperative 0.5, 1, 2, 4, 6, 12, and 24 hours, postoperative morphine consumption, analgesic demand, analgesic delivery, number of patients requiring rescue analgesics, side effects because of analgesic medications, and overall patient satisfaction were recorded and compared between the two groups. Two and 6 months after the operation, patients were evaluated for chronic postsurgical pain (CPSP). Postoperative average VAS pain scores were not different between the two groups. However, only at 2 hours postoperatively, pain score was significantly higher in Group ON than in Group LN. In both groups, the highest pain scores were recorded at 30 minutes and 1 hour after surgery. Ninety-six percent of group ON patients and 88% of group LN patients required additional analgesia in the early postoperative period (P = 0.33). Postoperative morphine consumption and analgesic demand were found to be similar between the two groups. CPSP at 2 months after surgery was observed in 4 out of 25 patients (16%) in the ON group and 3 out of 27 patients (11.1%) in the LN group (P = 0.6). Chronic pain at 6 months after surgery was observed in 1 ON patient (4%) and 1 LN patient (3.7%, P = 0.9). This study demonstrated that postoperative acute pain scores were not different after laparoscopic or open nephrectomy and patients undergoing laparoscopic or open nephrectomy were at equal risk of developing CPSP. Pain

  12. [Acute abdominal pain in the emergency department - a clinical algorithm for adult patients].

    PubMed

    Trentzsch, H; Werner, J; Jauch, K-W

    2011-04-01

    Acute abdominal pain represents the cardinal symptom behind a vast number of possible under-lying causes including several ones that re-quire surgical treatment. It is the most common sur-gical emergency, the most common cause for a surgical consultation in the emergency department and the most common cause for non-trauma related hospital admissions. The golden mis-sion statement is to rapidly identify whether the underlying cause requires an urgent or even immediate surgical intervention. However, behind the same cardinal symptom one may encounter harmless or non-urgent problems. By employing diagnostic means cost effectively and with the aim to avoid unnecessary exposure of the patient to X-rays in mind, the challenge remains to identify patients with an indication for emergency surgery from those who suffer from a less serious condition and thus can be treated conservatively and without any pressure of time. Dealing with such a highly complex decision-making process calls for a clinical algorithm. Many publications are available that have scrutinised the different aspects of the initial assessment and the emergency management of acute abdominal pain. How-ever, the large body of evidence seems to miss articles that describe a formally correct priority- and problem-based approach. Clinical algorithms apply to complex disease states such as acute abdominal pain and translate them into one clearly laid out, logically coordinated and systematic overall process. Our intention is to devel-op such an algorithm to approach acute abdominal pain from the surgeon's point of view. Based on daily practice and with reference to available literature, it is the aim of this study to define a work flow that simply summarises all steps in-volved and defines the required decision process in order to form the intellectual basis for an evidence-based clinical algorithm. The result is illustrated as a first draft of such an evidence-based algorithm to allow emergency evaluation of

  13. Acute non-traumatic gastrothorax: presentation of a case with chest pain and atypical radiologic findings.

    PubMed

    Singh, Deepwant; Mackeith, Pieter; Gopal, Dipesh Pravin

    2016-01-01

    A previously well 71-year-old woman presented to the Emergency Department with acute-onset left-sided chest pain. She was haemodynamically stable with unremarkable systemic examination. Her electrocardiogram and troponin were within normal limits and her chest radiograph showed a raised left hemi-diaphragm. Two hours after admission, this woman became acutely breathless, and suffered a pulseless electrical activity cardiac arrest. After cardiopulmonary resuscitation, there was a return of spontaneous circulation and regained consciousness. A repeat clinical assessment revealed a new left-sided dullness to percussion with contralateral percussive resonance on respiratory examination. CXR revealed a left pan-hemi-thoracic opacity whilst better definition using CT-pulmonary angiography (CTPA) indicated an acute tension gastrothorax secondary to a large left-sided diaphragmatic hernia. Nasogastric (NG) tube insertion was used to decompress the stomach and the patient underwent uncomplicated emergency laparoscopic hernia reduction. She remained well at 1-year follow-up. PMID:27027934

  14. [Acute inpatient multimodal pain therapy and rehabilitation: Framework conditions, tasks and differentiated patient allocation].

    PubMed

    Arnold, B; Casser, H-R; Klimczyk, K; Lutz, J; Brinkschmidt, T; Gralow, I; Irnich, D; Kaiser, U; Nagel, B; Schiltenwolf, M; Pfingsten, M; Sabatowski, R; Söllner, W

    2015-12-01

    Multimodal pain treatment programs are widely accepted as the medical treatment standard in the management of patients with chronic pain syndromes. The concepts and treatment strategies are based on the biopsychosocial model of pain and programs for early restoration of function. Although this concept is primarily implemented in the curative field, i.e. in hospitals for the treatment of patients with chronic pain diseases, modified programs based on the International Classification of Functioning (ICF) can now also be found in rehabilitation clinics. Despite the assumed similarities, significant differences in, for example the aims of the therapy and relevant structural and process variables have to be kept in mind when allocating patients to a program as provided by a hospital or a rehabilitation clinic. The aim of this article is to present the framework structures of both treatment levels with respect to the implementation of multimodal pain therapy programs and to elucidate the differential diagnostic approach to the indications. PMID:26452370

  15. Amygdala lesions produce analgesia in a novel, ethologically relevant acute pain test.

    PubMed

    Hebert, M A; Ardid, D; Henrie, J A; Tamashiro, K; Blanchard, D C; Blanchard, R J

    1999-08-01

    Acute pain tests using mechanical stimuli typically do not involve objects important in the evolutionary history of the subjects, and may fail to evaluate the contribution of biobehavioral defensive reactions to the total pain response. Spines are common structural defenses that protect plants and animals against predation. The present studies examined the reaction to contact with such natural, mechanical pain stimuli in the laboratory rat, utilizing a floor board with protruding pins located in the middle of a novel alley (the "fakir" test). Behavioral responses were characterized in 10-min tests (Experiment 1). Subjects showed voluntary contact with the pins followed by patterns of avoidance and risk assessment (stretch attend and stretch approach). Few subjects crossed the array of pins. The amygdala has been implicated in the perception of pain, particularly in stressful or fearful contexts. In Experiment 2, the fakir test was used to examine, concurrently, the effects of amygdala lesions on analgesiometric (frequency and duration of pin crossings) and anxiometric (risk assessment) measures. Large, bilateral, lesions of the amygdala significantly increased both the number of pin crossings and time spent on the pins without affecting the risk assessment measures. These findings suggest a possible dissociation between anxiety and pain perception with an important (nonaffective) role for the amygdala in the latter. PMID:10463635

  16. Acute Pain and Depressive Symptoms: Independent Predictors of Insomnia Symptoms among Adults with Sickle Cell Disease.

    PubMed

    Moscou-Jackson, Gyasi; Allen, Jerilyn; Kozachik, Sharon; Smith, Michael T; Budhathoki, Chakra; Haywood, Carlton

    2016-02-01

    No studies to date have systematically investigated insomnia symptoms among adults with sickle cell disease (SCD). The purpose of this study was to (1) describe the prevalence of insomnia symptoms and (2) identify biopsychosocial predictors in community-dwelling adults with SCD. Cross-sectional analysis of baseline data from 263 African American adults with SCD (aged 18 years or older). Measures included the Insomnia Severity Index (ISI), Center for Epidemiologic Studies in Depression scale, Urban Life Stress Scale, Brief Pain Inventory, and a chronic pain item. SCD genotype was extracted from the medical record. A slight majority (55%) of the sample reported clinically significant insomnia symptomatology (ISI ≥ 10), which suggests that insomnia symptoms are prevalent among community-dwelling African American adults with SCD. While insomnia symptoms were associated with a number of biopsychosocial characteristics, depressive symptoms and acute pain were the only independent predictors. Given the high number of participants reporting clinically significant insomnia symptoms, nurses should screen for insomnia symptoms and explore interventions to promote better sleep among adults with SCD, with an emphasis on recommending treatment for pain and depression. In addition, current pain and depression interventions in this population could add insomnia measures and assess the effect of the intervention on insomnia symptomatology as a secondary outcome. PMID:26673730

  17. Synthesis and Analgesic Effects of μ-TRTX-Hhn1b on Models of Inflammatory and Neuropathic Pain

    PubMed Central

    Liu, Yu; Tang, Jianguang; Zhang, Yunxiao; Xun, Xiaohong; Tang, Dongfang; Peng, Dezheng; Yi, Jianming; Liu, Zhonghua; Shi, Xiaoliu

    2014-01-01

    μ-TRTX-Hhn1b (HNTX-IV) is a 35-amino acid peptide isolated from the venom of the spider, Ornithoctonus hainana. It inhibits voltage-gated sodium channel Nav1.7, which has been considered as a therapeutic target for pain. The goal of the present study is to elucidate the analgesic effects of synthetic μ-TRTX-Hhn1b on animal models of pain. The peptide was first synthesized and then successfully refolded/oxidized. The synthetic peptide had the same inhibitory effect on human Nav1.7 current transiently expressed in HEK 293 cells as the native toxin. Furthermore, the analgesic potentials of the synthetic peptide were examined on models of inflammatory pain and neuropathic pain. μ-TRTX-Hhn1b produced an efficient reversal of acute nociceptive pain in the abdominal constriction model, and significantly reduced the pain scores over the 40-min period in the formalin model. The efficiency of μ-TRTX-Hhn1b on both models was equivalent to that of morphine. In the spinal nerve model, the reversal effect of μ-TRTX-Hhn1b on allodynia was longer and higher than mexiletine. These results demonstrated that μ-TRTX-Hhn1b efficiently alleviated acute inflammatory pain and chronic neuropathic pain in animals and provided an attractive template for further clinical analgesic drug design. PMID:25123556

  18. A Proposed Model of the Effective Management of Children's Pain.

    PubMed

    Simons, Joan

    2015-08-01

    The aim of this study was to understand the various factors that contribute to the delivery of effective pain management. The current picture of pain management is complex and contradictory, with children in the hospital still experiencing unnecessary pain, nurses reporting better pain care than is evidenced, and parents who are reluctant to report their child's pain. There is a real need to focus on areas of excellence where pain management innovations have been successfully implemented. Five hospitals were visited in three countries: the United Kingdom, Sweden, and Australia, spending a week in each country. In all, 28 health care professionals were interviewed exploring innovations in pain management; the effect of improvements on children, parents, and nurses; and what helped and hindered the delivery of effective pain management. Better pain management provides nurses with confidence, which in turn gives children and parents confidence in their care and reduces anxiety for nurses. Resources, on the other hand, were a common issue in relation to obstacles to innovation. A recurring theme in all areas visited was the issue of culture and how it affected both negatively and positively on the management of children's pain. Strong leadership was integral to moving practice forward and to introducing the innovations that led to effective pain management. The key findings identified that underpin the effective management of children's pain are effective leadership, resources, and confidence; the consequences are less stress for children and nurses, more trusting relationships, and greater job satisfaction. A model of effective pain management is proposed. PMID:26256220

  19. Treatment of acute, severe epigastric/chest pain in a patient with stomach cancer following gastrectomy: A case report

    PubMed Central

    ZAPOROWSKA-STACHOWIAK, IWONA; GORZELIŃSKA, LIDIA; SOPATA, MACIEJ; ŁUCZAK, JACEK

    2015-01-01

    The treatment of acute chest pain can be a challenge in palliative care. Firstly, because acute chest pain is a symptom of a paucity of diseases, which makes diagnosis difficult and time consuming, while there is also a time constraint, due to the extreme suffering of the patient. Secondly, the condition of a patient with advanced cancer disease and co-morbidities does not always allow for required diagnostic procedures. The present report describes a case of acute, severe epigastric/chest pain in a patient with dynamic disease progression, who was receiving palliative care. This study also demonstrates that the pathophysiology of pain in a terminal patient may determine the treatment strategy. The patient in the present case was a 41-year-old male, who had previously undergone gastrectomy for stomach cancer, followed by postoperative chemotherapy. The patient was treated with palliative chemotherapy for metastases to the lungs, liver and lymph nodes, which led to the development of iatrogenic peripheral neuropathy. The patient was subsequently admitted to the Palliative Medicine In-patient Unit of the University Hospital of Lord’s Transfiguration (Poznan, Poland) with the complaint of acute epigastric and chest pain. An electrocardiogram, echocardiogram, chest and abdomen computerized tomography scan, esophagoduodenoscopy and laboratory analyses were performed to determine the source of the pain. The patient was treated with morphine sulfate, metoclopramide, midazolam, diazepam, acetaminophen, ketamine, hyoscine butylbromide, propofol, dexamethasone and amoxycillin, and received parenteral nutrition. As the source of pain remained unclear, a second esophagoduodenoscopy was performed to determine a diagnosis, resulting in pain relief. Thus, in the present case, esophagoduodenoscopy was diagnostic and therapeutic. Furthermore, although the treatment of acute chest pain may be a challenge in palliative care, the present study indicates that pain treatment should be

  20. Dopamine and Pain Sensitivity: Neither Sulpiride nor Acute Phenylalanine and Tyrosine Depletion Have Effects on Thermal Pain Sensations in Healthy Volunteers

    PubMed Central

    Becker, Susanne; Ceko, Marta; Louis-Foster, Mytsumi; Elfassy, Nathaniel M.; Leyton, Marco; Shir, Yoram; Schweinhardt, Petra

    2013-01-01

    Based on animal studies and some indirect clinical evidence, dopamine has been suggested to have anti-nociceptive effects. Here, we investigated directly the effects of increased and decreased availability of extracellular dopamine on pain perception in healthy volunteers. In Study 1, participants ingested, in separate sessions, a placebo and a low dose of the centrally acting D2-receptor antagonist sulpiride, intended to increase synaptic dopamine via predominant pre-synaptic blockade. No effects were seen on thermal pain thresholds, tolerance, or temporal summation. Study 2 used the acute phenylalanine and tyrosine depletion (APTD) method to transiently decrease dopamine availability. In one session participants ingested a mixture that depletes the dopamine amino acid precursors, phenylalanine and tyrosine. In the other session they ingested a nutritionally balanced control mixture. APTD led to a small mood-lowering response following aversive thermal stimulation, but had no effects on the perception of cold, warm, or pain stimuli. In both studies the experimental manipulation of dopaminergic neurotransmission was successful as indicated by manipulation checks. The results contradict proposals that dopamine has direct anti-nociceptive effects in acute experimental pain. Based on dopamine’s well-known role in reward processing, we hypothesize that also in the context of pain, dopamine acts on stimulus salience and might play a role in the initiation of avoidance behavior rather than having direct antinociceptive effects in acute experimental pain. PMID:24236199

  1. Roles of Proton-Sensing Receptors in the Transition from Acute to Chronic Pain.

    PubMed

    Sun, W H; Chen, C C

    2016-02-01

    Chronic pain, when not effectively treated, is a leading health and socioeconomic problem and has a harmful effect on all aspects of health-related quality of life. Therefore, understanding the molecular mechanism of how pain transitions from the acute to chronic phase is essential for developing effective novel analgesics. Accumulated evidence has shown that the transition from acute to chronic pain is determined by a cellular signaling switch called hyperalgesic priming, which occurs in primary nociceptive afferents. The hyperalgesic priming is triggered by inflammatory mediators and is involved in a signal switch from protein kinase A (PKA) to protein kinase Cε (PKCε) located in both isolectin B4 (IB4)-positive (nonpeptidergic) and IB4-negative (peptidergic) nociceptors. Acidosis may be the decisive factor regulating the PKA-to-PKCε signal switch in a proton-sensing G-protein-coupled receptor-dependent manner. Protons can also induce the hyperalgesic priming in IB4-negative muscle nociceptors in a PKCε-independent manner. Acid-sensing ion channel 3 (ASIC3) and transient receptor potential/vanilloid receptor subtype 1 (TRPV1) are 2 major acid sensors involved in the proton-induced hyperalgesic priming. The proton-induced hyperalgesic priming in muscle afferents can be prevented by a substance P-mediated signaling pathway. In this review, we summarize the factors that modulate hyperalgesic priming in both IB4-positive and IB4-negative nociceptors and discuss the role of acid signaling in inflammatory and noninflammatory pain as well as orofacial muscle pain. PMID:26597969

  2. Intranasal ketamine for the treatment of patients with acute pain in the emergency department

    PubMed Central

    Shrestha, Roshana; Pant, Samita; Shrestha, Ashis; Batajoo, Kabita Hada; Thapa, Rashmi; Vaidya, Sumana

    2016-01-01

    BACKGROUND: Pain in the emergency department (ED) is common but undertreated. The objective of this study was to examine the efficacy and safety of intranasal (IN) ketamine used as an analgesic for patients with acute injury with moderate to severe pain. METHODS: This study was a cross sectional, observational study of patients more than 8 years old experiencing moderate to severe pain [visual analog score (VAS) >50 mm]. The initial dose of IN ketamine was 0.7 mg/kg with an additional dose of 0.3 mg/kg if VAS was more than 50 mm after 15 minutes. Pain scores and vital signs were recorded at 0, 15, 30 and 60 minutes. Side-effects, sedation level and patient’s satisfaction were also recorded. The primary outcome was the number of patients achieving ≥ 20 mm reductions in VAS at 15 minutes. Other secondary outcome measures were median reduction in VAS at 15, 30 and 60 minutes, changes of vital signs, adverse events, satisfaction of patients, and need for additional ketamine. RESULTS: Thirty-four patients with a median age of 29.5 years (IQR 17.5–38) were enrolled, and they had an initial median VAS of 80 mm (IQR 67–90). The VAS decreased more than 20 mm at 15 minutes in 27 (80%) patients. The reduction of VAS from baseline to 40 mm (IQR 20–40), 20 mm (IQR 14–20) and 20 mm (IQR 10–20) respectively at 15, 30 and 60 minutes (P<0.001). No critical changes of vital signs were noted and adverse effects were mild and transient. CONCLUSION: This study showed that IN ketamine is an analgesic choice for patients with acute injury in moderate to severe pain in an overcrowded and resource limited ED. PMID:27006733

  3. Management of acute neck pain in general practice: a prospective study

    PubMed Central

    Vos, Cees; Verhagen, Arianne; Passchier, Jan; Koes, Bart

    2007-01-01

    Background Research on neck pain in primary care is sparse. The role of GPs in taking care of patients with neck pain has not been described so far. This study focused on interested in the interaction between patients and GPs in their first contact on a new episode of neck pain. Aim To describe GPs' management of acute neck pain in patients and to detail the diagnostic and therapeutic procedures undertaken by GPs and self-care by patients. Design of study A prospective cohort study with 1-year follow up. Setting General practice in The Netherlands. Method Patients consulting their GP for non-specific acute neck pain lasting no longer than 6 weeks were invited to participate. Questionnaires were collected from patients at baseline and after 6, 12, 26, and 52 weeks. Patients rated their recovery on a 7-point ordinal scale. Results In total 187 patients were included. At baseline GPs prescribed medication for 42% of patients, mostly non-steroidal anti-inflammatory drugs (56%) or muscle relaxation medication (20%); 51% were referred to a physiotherapist. Seventy-four per cent of referred patients reported recovery at the end of the follow-up year, whereas 79% of non-referred patients reported recovery. Frequently-given advice by the GP was to ‘wait and see’ (23%), ‘improve posture’ and ‘stay active’ (22%) or to ‘take a rest’ (18%). Self-care by patients included different sources of heat application (79%) and exercises (57%). Complementary medicine was used in 12% of cases and 39% of patients visited their GP again during follow up. Consultation of a medical specialist and ordering of X-rays rarely occurred. Conclusion Management by GPs included a strategy to ‘wait and see’ for an expected favourable natural course supported by medication, or referral to a physiotherapist. PMID:17244420

  4. Acute pain management in opioid-tolerant patients: a growing challenge.

    PubMed

    Huxtable, C A; Roberts, L J; Somogyi, A A; MacIntyre, P E

    2011-09-01

    In Australia and New Zealand, in parallel with other developed countries, the number of patients prescribed opioids on a long-term basis has grown rapidly over the last decade. The burden of chronic pain is more widely recognised and there has been an increase in the use of opioids for both cancer and non-cancer indications. While the prevalence of illicit opioid use has remained relatively stable, the diversion and abuse of prescription opioids has escalated, as has the number of individuals receiving methadone or buprenorphine pharmacotherapy for opioid addiction. As a result, the proportion of opioid-tolerant patients requiring acute pain management has increased, often presenting clinicians with greater challenges than those faced when treating the opioid-naïve. Treatment aims include effective relief of acute pain, prevention of drug withdrawal, assistance with any related social, psychiatric and behavioural issues, and ensuring continuity of long-term care. Pharmacological approaches incorporate the continuation of usual medications (or equivalent), short-term use of sometimes much higher than average doses of additional opioid, and prescription of non-opioid and adjuvant drugs, aiming to improve pain relief and attenuate opioid tolerance and/or opioid-induced hyperalgesia. Discharge planning should commence at an early stage and may involve the use of a 'Reverse Pain Ladder' aiming to limit duration of additional opioid use. Legislative requirements may restrict which drugs can be prescribed at the time of hospital discharge. At all stages, there should be appropriate and regular consultation and liaison with the patient, other treating teams and specialist services. PMID:21970125

  5. Transcutaneous electrical nerve stimulation (TENS) as compared to placebo TENS for the relief of acute oro-facial pain.

    PubMed

    Hansson, P; Ekblom, A

    1983-02-01

    The present paper describes the effect of high frequency, low frequency and placebo TENS on acute oro-facial pain in 62 patients, attending to an emergency clinic for dental surgery; they had all suffered pain for 1-4 days. The patients were randomly assigned to one of three groups receiving either high frequency (100 Hz), low frequency (2 Hz) or placebo TENS. In the two groups receiving TENS (42 patients) 16 patients reported a reduction in pain intensity exceeding 50%; out of these 16 patients, 4 patients reported complete relief of pain. In the placebo group (20 patients) 2 patients reported a pain reduction of more than 50%; out of these 2 patients, none reported a complete pain relief. Mechanical vibratory stimulation augmented the pain reduction obtained by TENS in 5 out of 10 patients. PMID:6601789

  6. The Ising Model Applied on Chronification of Pain

    PubMed Central

    2016-01-01

    This is a hypothesis-article suggesting an entirely new framework for understanding and treating longstanding pain. Most medical and psychological models are described with boxes and arrows. Such models are of little clinical and explanatory use when describing the phenomenon of chronification of pain due to unknown causes. To date no models that have been provided - and tested in a scientific satisfactory way - lays out a plan for specific assessment due to a specific causal explanation, and in the end serves the clinicians, patients and researcher with tools on how to address the specific pain condition to every individual pain patient's condition. By applying the Ising model (from physics) on the phenomenon of chronification of pain, one is able to detangle all these factors, and thus have a model that both suggests an explanation of the condition and outlines how one might target the treatment of chronic pain patients with the use of network science. PMID:26398917

  7. Primary sensory and motor cortex function in response to acute muscle pain: A systematic review and meta-analysis.

    PubMed

    Burns, E; Chipchase, L S; Schabrun, S M

    2016-09-01

    Acute muscle pain has both motor and sensory consequences, yet the effect of muscle pain on the primary sensory (S1) and motor (M1) cortices has yet to be systematically evaluated. Here we aimed to determine the strength of the evidence for (1) altered activation of S1/M1 during and after pain, (2) the temporal profile of any change in activation and (3) the relationship between S1/M1 activity and the symptoms of pain. In September 2015, five electronic databases were systematically searched for neuroimaging and electrophysiological studies investigating the effect of acute experimental muscle pain on S1/M1 in healthy volunteers. Demographic data, methodological characteristics and primary outcomes for each study were extracted for critical appraisal. Meta-analyses were performed where appropriate. Twenty-five studies satisfied the inclusion criteria. There was consistent evidence from fMRI for increased S1 activation in the contralateral hemisphere during pain, but insufficient evidence to determine the effect at M1. Meta-analyses of TMS and EEG data revealed moderate to strong evidence of reduced S1 and corticomotor excitability during and following the resolution of muscle pain. A comprehensive understanding of the temporal profile of altered activity in S1/M1, and the relationship to symptoms of pain, is hampered by differences in methodological design, pain modality and pain severity between studies. Overall, the findings of this review indicate reduced S1 and corticomotor activity during and after resolution of acute muscle pain, mechanisms that could plausibly underpin altered sensorimotor function in pain. WHAT DOES THIS REVIEW ADD?: We provide the first systematic evaluation of the primary sensory (S1) and motor (M1) cortex response to acute experimental muscle pain in healthy volunteers. We present evidence from a range of methodologies to provide a comprehensive understanding of the effect of pain on S1/M1. Through meta-analyses we evaluate the strength

  8. Coordinated Digital-Assisted Program Improved Door-to-Balloon Time for Acute Chest Pain Patients.

    PubMed

    Chen, Hao; Liu, Jian; Xiang, Dingcheng; Qin, Weiyi; Zhou, Minwei; Tian, Yan; Wang, Mingyu; Yang, Jijiang; Gao, Qiang

    2016-05-25

    Emergency care for patients with chest pain can be a challenge in remote areas. Digital communication technology has the potential to improve outcomes by allowing early diagnosis and faster treatment. The aim of the present study was to investigate whether implementation of a coordinated digital-assisted program (CDAP) for Chinese hospitals can reduce the door-to-balloon (D2B) time for percutaneous coronary intervention (PCI) in acute chest pain patients in China. From March to December 2011, 609 patients (CDAP group) requiring an emergency response for acute chest pain were evaluated using this CDAP. The results were compared in terms of time interval reduction (including D2B) and economic indices with those of 528 patients (non-CDAP group) previously treated by conventional protocols after admission. We screened 154 and 127 eligible patients under PCI in the CDAP and non-CDAP groups, respectively. PCI patients achieved a D2B time < 90 minutes using CDAP (82.5 versus 26.0%, P < 0.001). CDAP reduced D2B time under PCI and reduced hospitalization lengths and costs (all P < 0.001). PMID:27150005

  9. ACR Appropriateness Criteria® Acute Pelvic Pain in the Reproductive Age Group.

    PubMed

    Bhosale, Priyadarshani R; Javitt, Marcia C; Atri, Mostafa; Harris, Robert D; Kang, Stella K; Meyer, Benjamin J; Pandharipande, Pari V; Reinhold, Caroline; Salazar, Gloria M; Shipp, Thomas D; Simpson, Lynn; Sussman, Betsy L; Uyeda, Jennifer; Wall, Darci J; Zelop, Carolyn M; Glanc, Phyllis

    2016-06-01

    Acute pelvic pain in premenopausal women frequently poses a diagnostic dilemma. These patients may exhibit nonspecific signs and symptoms such as nausea, vomiting and leukocytosis. The cause of pelvic pain includes a myriad of diagnostic possibilities such as obstetric, gynecologic, urologic, gastrointestinal, and vascular etiologies. The choice of the imaging modality is usually determined by a suspected clinical differential diagnosis. Thus the patient should undergo careful evaluation and the suspected differential diagnosis should be narrowed before an optimal imaging modality is chosen. Transvaginal and transabdominal pelvic sonography is the modality of choice, to assess for pelvic pain, when an obstetric or gynecologic etiology is suspected and computed tomography is often more useful when gastrointestinal or genitourinary pathology is thought to be more likely. Magnetic resonance imaging, when available in the acute setting, is favored over computed tomography for assessing pregnant patients for nongynecologic etiologies owing to its lack of ionizing radiation.The American College of Radiology Appropriateness Criteria® are evidence-based guidelines for specific clinical conditions that are reviewed every three years by a multidisciplinary expert panel. The guideline development and review include an extensive analysis of current medical literature from peer reviewed journals and the application of a well-established consensus methodology (modified Delphi) to rate the appropriateness of imaging and treatment procedures by the panel. In those instances where evidence is lacking or not definitive, expert opinion may be used to recommend imaging or treatment. PMID:26588104

  10. A systematic review of therapeutic interventions to reduce acute and chronic post-surgical pain after amputation, thoracotomy or mastectomy*

    PubMed Central

    Humble, SR; Dalton, AJ; Li, L

    2015-01-01

    Background Perioperative neuropathic pain is under-recognized and often undertreated. Chronic pain may develop after any routine surgery, but it can have a far greater incidence after amputation, thoracotomy or mastectomy. The peak noxious barrage due to the neural trauma associated with these operations may be reduced in the perioperative period with the potential to reduce the risk of chronic pain. Databases and data treatment A systematic review of the evidence for perioperative interventions reducing acute and chronic pain associated with amputation, mastectomy or thoracotomy. Results Thirty-two randomized controlled trials met the inclusion criteria. Gabapentinoids reduced pain after mastectomy, but a single dose was ineffective for thoracotomy patients who had an epidural. Gabapentinoids were ineffective for vascular amputees with pre-existing chronic pain. Venlafaxine was associated with less chronic pain after mastectomy. Intravenous and topical lidocaine and perioperative EMLA (eutectic mixture of local anaesthetic) cream reduced the incidence of chronic pain after mastectomy, whereas local anaesthetic infiltration appeared ineffective. The majority of the trials investigating regional analgesia found it to be beneficial for chronic symptoms. Ketamine and intercostal cryoanalgesia offered no reduction in chronic pain. Total intravenous anaesthesia (TIVA) reduced the incidence of post-thoracotomy pain in one study, whereas high-dose remifentanil exacerbated chronic pain in another. Conclusions Appropriate dose regimes of gabapentinoids, antidepressants, local anaesthetics and regional anaesthesia may potentially reduce the severity of both acute and chronic pain for patients. Ketamine was not effective at reducing chronic pain. Intercostal cryoanalgesia was not effective and has the potential to increase the risk of chronic pain. TIVA may be beneficial but the effects of opioids are unclear. PMID:25088289

  11. Epigenetic regulation of persistent pain

    PubMed Central

    Bai, Guang; Ren, Ke; Dubner, Ronald

    2014-01-01

    Persistent or chronic pain is tightly associated with various environmental changes and linked to abnormal gene expression within cells processing nociceptive signaling. Epigenetic regulation governs gene expression in response to environmental cues. Recent animal model and clinical studies indicate that epigenetic regulation plays an important role in the development/maintenance of persistent pain and, possibly the transition of acute pain to chronic pain, thus shedding light in a direction for development of new therapeutics for persistent pain. PMID:24948399

  12. Pediatric pain management.

    PubMed

    Lederhaas, G

    1997-01-01

    It is now recognized that from the newborn period onwards, children are capable of experiencing pain. This includes the premature infant. The challenge for healthcare providers is to incorporate methods of pain assessment and treatment into their daily practices. The child's understanding of pain closely follows the cognitive and behavioral model developed by Jean Piaget. Based on these developmental stages, pain assessment measures have been developed. Pharmacologic advances have accompanied this improved understanding of infant, child, and adolescent psychology. While acute pain accounts for the majority of children's experiences, recurrent/chronic pain states do occur (e.g. sickle cell related and neuropathic) and can be effectively treated. PMID:9037997

  13. The Effect of Gabapentin on Acute Postoperative Pain in Patients Undergoing Total Knee Arthroplasty

    PubMed Central

    Zhai, Lifeng; Song, Zhoufeng; Liu, Kang

    2016-01-01

    Abstract The purpose of this systematic review and meta-analysis of randomized controlled trials (RCTs) and non-RCTs was to evaluate the efficacy and safety of gabapentin versus placebo for pain control after total knee arthroplasty (TKA). In December 2015, a systematic computer-based search was conducted in the Medline, Embase, PubMed, Cochrane Controlled Trials Register (CENTRAL), Web of Science, Google, and Chinese Wanfang databases. This systematic review and meta-analysis were performed according to the preferred reporting items for systematic reviews and meta-analyses (PRISMA) statement criteria. The primary endpoint was the visual analogue scale (VAS) score after TKA with rest or mobilization at 24 and 48 hours, representing the efficacy of pain control after TKA. Cumulative morphine consumption via patient controlled anesthesia (PCA) was also assessed to determine the morphine-spare effect. Complications such as dizziness, pruritus, vomiting, nausea, and sedation were also compiled to assess the safety of gabapentin. Stata 12.0 software was used for the meta-analysis. After testing for publication bias and heterogeneity across studies, the data were aggregated for random-effects modeling whenever necessary. Six studies involving 769 patients met the inclusion criteria. Our meta-analysis revealed that gabapentin resulted in superior pain relief compared to the control group in terms of VAS score with rest at 24 hours (mean difference [MD] = −3.47; 95% confidence interval [CI] −6.16 to −0.77; P = 0.012) and at 48 hours postoperatively (MD = −2.25; 95% CI −4.21 to −0.30; P = 0.024). There was no statistically significant difference between the groups with respect to the VAS score at 24 hours postoperatively (MD = 1.05; 95% CI −3.31 to 5.42; P = 0.636) or at 48 hours (MD = 1.71; 95% CI −0.74 to 4.15; P = 0.171). These results indicated that the perioperative administration of gabapentin decreases the

  14. Double-blind study with dipyrone versus tramadol and butylscopolamine in acute renal colic pain.

    PubMed

    Stankov, G; Schmieder, G; Zerle, G; Schinzel, S; Brune, K

    1994-01-01

    To investigate the combined analgesic and spasmolytic effect of dipyrone, 104 patients suffering from "severe" or "excruciating" colic pain due to a confirmed calculus in the upper urinary tract were randomized to receive i.v. either 2.5 g dipyrone (36 patients), 100 mg tramadol (35 patients), or 20 mg butylscopolamine (33 patients) in a multicentre, observer-blind, parallel-group study conducted in 8 German centres. The three treatment groups were homogeneous when analyzed by age, sex, height, and baseline pain intensity. Dipyrone was significantly more effective than tramadol in reducing pain for the primary endpoint, pain intensity differences (PID) at 20, 30, and 50 min after drug administration, and was significantly more effective than butylscopolamine at 30 and 50 min for the secondary efficacy endpoint, pain intensity differences on a categorical scale. Dipyrone had the highest SPID0-2 h of the three drugs (P < 0.05). Only 5 patients receiving dipyrone needed "rescue" medication as compared with 13 patients given tramadol and 11 patients receiving butylscopolamine. Adverse events were observed in 4 patients receiving butylscopolamine and in 1 patient each given dipyrone and tramadol. "Distinct" pain relief as assessed on a visual analogue scale (VAS) is a reliable method of determining the onset of analgesic action in the colic pain model. PMID:7951343

  15. Faster, higher, stronger? Evidence for formulation and efficacy for ibuprofen in acute pain.

    PubMed

    Moore, R Andrew; Derry, Sheena; Straube, Sebastian; Ireson-Paine, Jocelyn; Wiffen, Phillip J

    2014-01-01

    A Cochrane review of ibuprofen in acute pain suggested that rapidly absorbed formulations of salts, or features to speed absorption, provided better analgesia than standard ibuprofen as the free acid. We examined several lines of evidence to investigate what benefit derived from fast-acting formulations. A systematic review of the kinetics of oral ibuprofen (30 studies, 1015 subjects) showed that median maximum plasma concentrations of fast-acting formulations occurred before 50 min (29-35 min for arginine, lysine, and sodium salts) compared with 90 min for standard formulations. An updated analysis of clinical trials (over 10,000 patients) showed that fast-acting formulations produced significantly better analgesia over 6h and fewer remedications than standard formulations in both indirect and direct comparisons. In dental studies, 200-mg fast-acting ibuprofen (number needed to treat 2.1; 95% confidence interval 1.9-2.4) was as effective as 400 mg standard ibuprofen (number needed to treat 2.4; 95% confidence interval 2.2-2.5), with faster onset of analgesia. Individual patient data analysis in dental pain demonstrated a strong correlation between more rapid reduction of pain intensity over 0-60 min and better pain relief over 0-6h. Rapid initial reduction of pain intensity was also linked with reduced need for remedication. Fast-acting formulations of ibuprofen demonstrated more rapid absorption, faster initial pain reduction, good overall analgesia in more patients at the same dose, and probably longer-lasting analgesia, but with no higher rate of patients reporting adverse events. Achieving a better analgesic effect with fast-acting nonsteroidal anti-inflammatory drug formulations has important implications for safety. Formulation chemistry is of potential importance for analgesics. PMID:23969325

  16. Pre-natal stress amplifies the immediate behavioural responses to acute pain in piglets.

    PubMed

    Rutherford, Kenneth M D; Robson, Sheena K; Donald, Ramona D; Jarvis, Susan; Sandercock, Dale A; Scott, E Marian; Nolan, Andrea M; Lawrence, Alistair B

    2009-08-23

    Pre-natal stress (PNS) or undernutrition can have numerous effects on an individual's biology throughout their lifetime. Some of these effects may be adaptive by allowing individuals to tailor their phenotype to environmental conditions. Here we investigated, in the domestic pig Sus scrofa, whether one possible consequence of a predicted adverse environment could be altered pain perception. The behavioural response of piglets to the surgical amputation ('docking') of their tail or a sham procedure was measured for 1 min in piglets born to mothers who either experienced mid-gestation social stress or were left undisturbed throughout pregnancy. A behavioural pain score was found to predict the docked status of piglets with high discriminant accuracy. Piglets exposed to PNS had a significantly higher pain score than controls, and for each litter of tail-docked piglets, the average pain score was correlated with mid-gestation maternal cortisol levels. The data presented here provide evidence that the experience of stress in utero can result in a heightened acute response to injury in early life. Speculatively, this may represent an adaptive alteration occurring as a consequence of a pre-natal 'early warning' of environmental adversity. PMID:19411272

  17. The role of intercostal nerve preservation in acute pain control after thoracotomy*

    PubMed Central

    Marchetti-Filho, Marco Aurélio; Leão, Luiz Eduardo Villaça; Costa-Junior, Altair da Silva

    2014-01-01

    OBJECTIVE: To evaluate whether the acute pain experienced during in-hospital recovery from thoracotomy can be effectively reduced by the use of intraoperative measures (dissection of the neurovascular bundle prior to the positioning of the Finochietto retractor and preservation of the intercostal nerve during closure). METHODS: We selected 40 patients who were candidates for elective thoracotomy in the Thoracic Surgery Department of the Federal University of São Paulo/Paulista School of Medicine, in the city of São Paulo, Brazil. The patients were randomized into two groups: conventional thoracotomy (CT, n = 20) and neurovascular bundle preservation (NBP, n = 20). All of the patients underwent thoracic epidural anesthesia and muscle-sparing thoracotomy. Pain intensity was assessed with a visual analog scale on postoperative days 1, 3, and 5, as well as by monitoring patient requests for/consumption of analgesics. RESULTS: On postoperative day 5, the self-reported pain intensity was significantly lower in the NBP group than in the CT group (visual analog scale score, 1.50 vs. 3.29; p = 0.04). No significant differences were found between the groups regarding the number of requests for/consumption of analgesics. CONCLUSIONS: In patients undergoing thoracotomy, protecting the neurovascular bundle prior to positioning the retractor and preserving the intercostal nerve during closure can minimize pain during in-hospital recovery. PMID:24831401

  18. Acute Painful Neuropathy in a Girl with Type 1 Diabetes: Long Term Follow-Up

    PubMed Central

    Jayaraman, Dhaarani; Sankhyan, Naveen; Singhi, Pratibha

    2016-01-01

    Acute Painful Diabetic Neuropathy (APDN) is a reversible neuropathy that occurs in patients with diabetes usually after a fast improvement in glycaemic control. The condition is extremely rare in children with Type 1 Diabetes (T1D). We describe a 12-year-old girl T1D who developed APDN shortly after diagnosis of T1D. Neurological examination and nerve conduction studies showed severe asymmetric lower limb sensorimotor neuropathy. She was treated with carbamazepine, benfotiamine (vitamin B1 analogue), and NSAID analgesics and showed complete recovery 9 months after the onset. The treating physicians should recognize and understand this entity in view of the current recommendations for quick achievement of glycaemic targets in T1D, the need to provide relief from severe pain and to lay emphasis on complete recovery. PMID:27437321

  19. Acute Painful Neuropathy in a Girl with Type 1 Diabetes: Long Term Follow-Up.

    PubMed

    Dayal, Devi; Jayaraman, Dhaarani; Sankhyan, Naveen; Singhi, Pratibha

    2016-05-01

    Acute Painful Diabetic Neuropathy (APDN) is a reversible neuropathy that occurs in patients with diabetes usually after a fast improvement in glycaemic control. The condition is extremely rare in children with Type 1 Diabetes (T1D). We describe a 12-year-old girl T1D who developed APDN shortly after diagnosis of T1D. Neurological examination and nerve conduction studies showed severe asymmetric lower limb sensorimotor neuropathy. She was treated with carbamazepine, benfotiamine (vitamin B1 analogue), and NSAID analgesics and showed complete recovery 9 months after the onset. The treating physicians should recognize and understand this entity in view of the current recommendations for quick achievement of glycaemic targets in T1D, the need to provide relief from severe pain and to lay emphasis on complete recovery. PMID:27437321

  20. An unusual cause of chest pain: Acute coronary syndrome following administration of ergotamine tartrate.

    PubMed

    Okutucu, Sercan; Karakulak, Ugur Nadir; Kabakcı, Giray; Aytemir, Kudret

    2012-01-01

    For many years, ergotamine has been used for the acute treatment of migraine. Ergotamine may produce coronary vasospasm, which is often associated with ischemic electrocardiography changes and angina pectoris. A 62-year-old woman who was admitted to the emergency department because of chest pain is described. She had a history of severe migraine attacks and started to use ergotamine tartrate 0.75 mg daily the day before. Electrocardiography revealed sinus tachycardia with left anterior hemiblock and T wave inversion in the precordial leads. Cardiac biomarker levels were elevated. After discontinuation of the drug and initiation of vasodilator treatment, her chest pain resolved. Patients with migraine may have an underlying vasospastic disorder predisposing them to coronary artery spasm. Physicians should be alerted to potential cardiac vasospastic effects of low-dose ergotamine in the treatment of migraine. PMID:23204901

  1. Topical Application of Ketoprofen Improves Gait Disturbance in Rat Models of Acute Inflammation

    PubMed Central

    Tanaka, Akane; Matsuda, Akira; Oida, Kumiko; Jung, Kyungsook; Nishikawa, Sho; Jang, Hyosun; Ishizaka, Saori; Matsuda, Hiroshi

    2013-01-01

    Arthritis is a disabling health problem and commonly develops in the late stages of life; the condition is typically accompanied by chronic pain. For the assessment of pain severity and therapeutic effects of analgesic drugs, we recently developed a gait analysis system, which provides an index of pain severity based on walking stride disturbance. Using this system, we evaluated the therapeutic effect of topical nonsteroidal anti-inflammatory drugs (NSAIDs) in rat models of acute inflammation. We found that the gait analysis system is more sensitive than conventional evaluation methods, such as measurement of swelling or analgesia, which indicated the superiority of our system for drug screening. The approach also indicated that ketoprofen is superior to other NSAIDs for providing pain relief because of its higher skin permeability. To the best of our knowledge, this is the first report demonstrating the effectiveness of topical NSAIDs in experimental animal models of acute inflammation. PMID:23991419

  2. Flexion Relaxation Ratio Not Responsive to Acutely Induced Low Back Pain from a Delayed Onset Muscle Soreness Protocol

    PubMed Central

    Horn, Maggie E.; Bishop, Mark D.

    2013-01-01

    Background. The flexion relaxation ratio (FRR) has been suggested as a measure of muscular performance in patients with low back pain (LBP). The purpose of this study was to investigate whether the FRR was responsive to acute LBP produced from a delayed onset muscle soreness (DOMS) protocol. Methods. Fifty-one pain-free volunteers performed DOMS to induce LBP. Current pain intensity, trunk flexion range of motion (ROM), and passive straight leg raise (SLR) were measured at baseline, 24 and 48 hours after DOMS. Participants were categorized into pain groups based on reported current pain intensity. Changes in FRR, trunk flexion ROM, and SLR ROM were examined using two-way repeated measures analysis of variance. Results. Pain group was not found to have a significant effect on FRR (F1,29 = 0.054, P = 0.818), nor were there any two-way interactions for changes in FRR. The pain group had decreased trunk flexion ROM compared to the minimal pain group (F1,38 = 7.21, P = 0.011), but no decreases in SLR ROM (F1,38 = 3.51, P = 0.057) over time. Interpretation. There were no differences in FRR based on reported pain intensity of LBP from a DOMS protocol. The responsiveness of FRR might be limited in patients with acute onset LBP of muscular origin. PMID:27335879

  3. Mesotherapy versus Systemic Therapy in the Treatment of Acute Low Back Pain: A Randomized Trial.

    PubMed

    Costantino, Cosimo; Marangio, Emilio; Coruzzi, Gabriella

    2011-01-01

    Pharmacological therapy of back pain with analgesics and anti-inflammatory drugs is frequently associated with adverse effects, particularly in the elderly. Aim of this study was to compare mesotherapic versus conventional systemic administration of nonsteroidal anti-inflammatory drugs (NSAIDs) and corticosteroids in patients with acute low back pain. Eighty-four patients were randomized to receive anti-inflammatory therapy according to the following protocols: (a) mesotherapy group received the 1st and 4th day 2% lidocaine (1 mL) + ketoprofen 160 mg (1 mL) + methylprednisolone 40 mg (1 mL), then on 7th, 10th, and 13th day, 2% lidocaine (1 mL) + ketoprofen 160 mg (1 mL) + methylprednisolone 20 mg (1 mL) (b) conventional therapy group received ketoprofen 80 mg × 2/die and esomeprazole 20 mg/die orally for 12 days, methylprednisolone 40 mg/die intramuscularly for 4 days, followed by methylprednisolone 20 mg/die for 3 days, and thereafter, methylprednisolone 20 mg/die at alternate days. Pain intensity and functional disability were assessed at baseline (T0), at the end of treatment (T1), and 6 months thereafter (T2) by using visual analogic scale (VAS) and Roland-Morris disability questionnaire (RMDQ). In both groups, VAS and RMDQ values were significantly reduced at the end of drug treatment and after 6 months, in comparison with baseline. No significant differences were found between the two groups. This suggests that mesotherapy may be a valid alternative to conventional therapy in the treatment of acute low back pain with corticosteroids and NSAIDs. PMID:20953425

  4. Effect of painless diabetic neuropathy on pressure pain hypersensitivity (hyperalgesia) after acute foot trauma

    PubMed Central

    Wienemann, Tobias; Chantelau, Ernst A.; Koller, Armin

    2014-01-01

    Introduction and objective Acute injury transiently lowers local mechanical pain thresholds at a limb. To elucidate the impact of painless (diabetic) neuropathy on this post-traumatic hyperalgesia, pressure pain perception thresholds after a skeletal foot trauma were studied in consecutive persons without and with neuropathy (i.e. history of foot ulcer or Charcot arthropathy). Design and methods A case–control study was done on 25 unselected clinical routine patients with acute unilateral foot trauma (cases: elective bone surgery; controls: sprain, toe fracture). Cases were 12 patients (11 diabetic subjects) with severe painless neuropathy and chronic foot pathology. Controls were 13 non-neuropathic persons. Over 1 week after the trauma, cutaneous pressure pain perception threshold (CPPPT) and deep pressure pain perception threshold (DPPPT) were measured repeatedly, adjacent to the injury and at the opposite foot (pinprick stimulators, Algometer II®). Results In the control group, post-traumatic DPPPT (but not CPPPT) at the injured foot was reduced by about 15–25%. In the case group, pre- and post-operative CPPPT and DPPPT were supranormal. Although DPPPT fell post-operatively by about 15–20%, it remained always higher than the post-traumatic DPPPT in the control group: over musculus abductor hallucis 615 kPa (kilopascal) versus 422 kPa, and over metatarsophalangeal joint 518 kPa versus 375 kPa (medians; case vs. control group); CPPPT did not decrease post-operatively. Conclusion Physiological nociception and post-traumatic hyperalgesia to pressure are diminished at the foot with severe painless (diabetic) neuropathy. A degree of post-traumatic hypersensitivity required to ‘pull away’ from any one, even innocuous, mechanical impact in order to avoid additional damage is, therefore, lacking. PMID:25397867

  5. A computational model unifies apparently contradictory findings concerning phantom pain

    PubMed Central

    Boström, Kim J.; de Lussanet, Marc H. E.; Weiss, Thomas; Puta, Christian; Wagner, Heiko

    2014-01-01

    Amputation often leads to painful phantom sensations, whose pathogenesis is still unclear. Supported by experimental findings, an explanatory model has been proposed that identifies maladaptive reorganization of the primary somatosensory cortex (S1) as a cause of phantom pain. However, it was recently found that BOLD activity during voluntary movements of the phantom positively correlates with phantom pain rating, giving rise to a model of persistent representation. In the present study, we develop a physiologically realistic, computational model to resolve the conflicting findings. Simulations yielded that both the amount of reorganization and the level of cortical activity during phantom movements were enhanced in a scenario with strong phantom pain as compared to a scenario with weak phantom pain. These results suggest that phantom pain, maladaptive reorganization, and persistent representation may all be caused by the same underlying mechanism, which is driven by an abnormally enhanced spontaneous activity of deafferented nociceptive channels. PMID:24931344

  6. A computational model unifies apparently contradictory findings concerning phantom pain

    NASA Astrophysics Data System (ADS)

    Boström, Kim J.; de Lussanet, Marc H. E.; Weiss, Thomas; Puta, Christian; Wagner, Heiko

    2014-06-01

    Amputation often leads to painful phantom sensations, whose pathogenesis is still unclear. Supported by experimental findings, an explanatory model has been proposed that identifies maladaptive reorganization of the primary somatosensory cortex (S1) as a cause of phantom pain. However, it was recently found that BOLD activity during voluntary movements of the phantom positively correlates with phantom pain rating, giving rise to a model of persistent representation. In the present study, we develop a physiologically realistic, computational model to resolve the conflicting findings. Simulations yielded that both the amount of reorganization and the level of cortical activity during phantom movements were enhanced in a scenario with strong phantom pain as compared to a scenario with weak phantom pain. These results suggest that phantom pain, maladaptive reorganization, and persistent representation may all be caused by the same underlying mechanism, which is driven by an abnormally enhanced spontaneous activity of deafferented nociceptive channels.

  7. A computational model unifies apparently contradictory findings concerning phantom pain.

    PubMed

    Boström, Kim J; de Lussanet, Marc H E; Weiss, Thomas; Puta, Christian; Wagner, Heiko

    2014-01-01

    Amputation often leads to painful phantom sensations, whose pathogenesis is still unclear. Supported by experimental findings, an explanatory model has been proposed that identifies maladaptive reorganization of the primary somatosensory cortex (S1) as a cause of phantom pain. However, it was recently found that BOLD activity during voluntary movements of the phantom positively correlates with phantom pain rating, giving rise to a model of persistent representation. In the present study, we develop a physiologically realistic, computational model to resolve the conflicting findings. Simulations yielded that both the amount of reorganization and the level of cortical activity during phantom movements were enhanced in a scenario with strong phantom pain as compared to a scenario with weak phantom pain. These results suggest that phantom pain, maladaptive reorganization, and persistent representation may all be caused by the same underlying mechanism, which is driven by an abnormally enhanced spontaneous activity of deafferented nociceptive channels. PMID:24931344

  8. Changing Paradigms for Acute Dental Pain: Prevention Is Better Than PRN.

    PubMed

    Dionne, Raymond A; Gordon, Sharon M

    2015-11-01

    A B S T R A C T The drugs available for the management of acute orofacial pain have changed very little since the introduction of ibuprofen into practice 40 years ago. Orally effective opioids, acetaminophen, aspirin and NSAIDs remain the mainstay of analgesic therapy. Increased recognition of the societal and personal impact of opioid diversion and abuse requires re-examination of the traditional approach of prescribing an opioid-containing analgesic combination to be administered by the patient "as needed" (PRN) starting postoperatively. PMID:26798882

  9. Recurrent abdominal and cervical pains. An unusual clinical presentation of acute rheumatic fever.

    PubMed

    Lahat, E; Azizi, E; Eshel, G; Mundel, G

    1986-03-01

    Most cases of acute rheumatic fever (ARF) present with arthritis, carditis or choreiform movements. However, a variety of clinical manifestations which are not included in the modified Jones criteria can be the presenting symptoms of the disease. We describe a case of a 10-year-old boy with ARF who presented with recurrent episodes of abdominal and cervical pain who later developed an active carditis which established the diagnosis of ARF. A high degree of suspicion and an awareness of the less common manifestations of ARF are necessary to make an early diagnosis and initiate appropriate treatment in certain cases of ARF. PMID:3583777

  10. Does a continuous local anaesthetic pain treatment after immediate tissue expander reconstruction in breast carcinoma patients more efficiently reduce acute postoperative pain - a prospective randomised study

    PubMed Central

    2014-01-01

    Background Immediate breast reconstruction with an expander is a reasonable option for properly selected patients. After reconstruction, patients have severe postoperative pain, which responds poorly to opioids. Our aim was to evaluate if continuous wound infusion of a local anaesthetic into the surgical wound reduces postoperative pain, consumption of opioids and incidence of chronic pain compared to standard intravenous piritramide after primary breast reconstruction in breast carcinoma patients. Methods Altogether, 60 patients were enrolled in our study; one half in the group with wound infusion of a local anaesthetic, and the other half in the standard (piritramide) group. Parameters measured included: pain intensity (visual analogue scale), drug requirements, alertness, hospitalisation, side-effects and late complications. A p-value of < 0.05 was considered statistically significant. Results In the recovery room, the test group reported less acute pain at rest (P = 0.03) and at activity (P = 0.01), and on the day of the surgical procedure they reported less pain at activity (P = 0.003). Consumption of piritramide and metoclopramide was lower in this group (P < 0.0001), but their alertness after the surgical procedure was higher compared to the standard group (P < 0.001). After three months, the test group reported less chronic pain (P = 0.01). Conclusions After primary tissue expander breast reconstruction, wound infusion of a local anaesthetic significantly reduces acute pain and enables reduced opioid consumption, resulting in less postoperative sedation and reduced need for antiemetic drugs. Wound infusion of a local anaesthetic reduces chronic pain. PMID:24433317

  11. ACR Appropriateness Criteria on acute pelvic pain in the reproductive age group.

    PubMed

    Andreotti, Rochelle F; Lee, Susanna I; Choy, Garry; DeJesus Allison, Sandra O; Bennett, Genevieve L; Brown, Douglas L; Glanc, Phyllis; Horrow, Mindy M; Javitt, Marcia C; Lev-Toaff, Anna S; Podrasky, Ann E; Scoutt, Leslie M; Zelop, Carolyn

    2009-04-01

    Premenopausal women who present with acute pelvic pain frequently pose a diagnostic dilemma, exhibiting nonspecific signs and symptoms, the most common being nausea, vomiting, and leukocytosis. Diagnostic considerations encompass multiple organ systems, including obstetric, gynecologic, urologic, gastrointestinal, and vascular etiologies. The selection of imaging modality is determined by the clinically suspected differential diagnosis. Thus, a careful evaluation of such a patient should be performed and diagnostic considerations narrowed before a modality is chosen. Transvaginal and transabdominal pelvic sonography is the modality of choice when an obstetric or gynecologic abnormality is suspected, and computed tomography is more useful when gastrointestinal or genitourinary pathology is more likely. Magnetic resonance imaging, when available in the acute setting, is favored over computed tomography for assessing pregnant patients for nongynecologic etiologies because of the lack of ionizing radiation. PMID:19327655

  12. Metabolic brain activity suggestive of persistent pain in a rat model of neuropathic pain

    PubMed Central

    Thompson, Scott J; Millecamps, Magali; Aliaga, Antonio; Seminowicz, David A; Low, Lucie A; Bedell, Barry J; Stone, Laura S; Schweinhardt, Petra; Bushnell, M Catherine

    2014-01-01

    Persistent pain is a central characteristic of neuropathic pain conditions in humans. Knowing whether rodent models of neuropathic pain produce persistent pain is therefore crucial to their translational applicability. We investigated the Spared Nerve Injury (SNI) model of neuropathic pain and the formalin pain model in rats using Positron Emission Tomography (PET) with the metabolic tracer [18F]fluorodeoxyglucose (FDG) to determine if there is ongoing brain activity suggestive of persistent pain. For the formalin model, under brief anesthesia we injected one hindpaw with 5% formalin and the FDG tracer into a tail vein. We then allowed the animals to awaken and observed pain behavior for 30 min during the FDG uptake period. The rat was then anesthetized and placed in the scanner for static image acquisition, which took place between minutes 45 and 75 post-tracer injection. A single reference rat brain magnetic resonance image (MRI) was used to align the PET images with the Paxinos and Watson rat brain atlas. Increased glucose metabolism was observed in the somatosensory region associated with the injection site (S1 hindlimb contralateral), S1 jaw/upper lip and cingulate cortex. Decreases were observed in the prelimbic cortex and hippocampus. Second, SNI rats were scanned 3 weeks post-surgery using the same scanning paradigm, and region-of-interest analyses revealed increased metabolic activity in the contralateral S1 hindlimb. Finally, a second cohort of SNI rats were scanned while anesthetized during the tracer uptake period, and the S1 hindlimb increase was not observed. Increased brain activity in the somatosensory cortex of SNI rats resembled the activity produced with the injection of formalin, suggesting that the SNI model may produce persistent pain. The lack of increased activity in S1 hindlimb with general anesthetic demonstrates that this effect can be blocked, as well as highlights the importance of investigating brain activity in awake and behaving

  13. Systematic review of efficacy of topical rubefacients containing salicylates for the treatment of acute and chronic pain

    PubMed Central

    Mason, Lorna; Moore, R Andrew; Edwards, Jayne E; McQuay, Henry J; Derry, Sheena; Wiffen, Philip J

    2004-01-01

    Objective To determine the efficacy and safety of topical rubefacients containing salicylates in acute and chronic pain. Data sources Electronic databases and manufacturers of salicylates. Study selection Randomised double blind trials comparing topical rubefacients with placebo or another active treatment, in adults with acute or chronic pain, and reporting dichotomous information, around a 50% reduction in pain, and analyses at one week for acute conditions and two weeks for chronic conditions. Data extraction Relative benefit and number needed to treat, analysis of adverse events, and withdrawals. Data synthesis Three double blind placebo controlled trials had information on 182 patients with acute conditions. Topical salicylate was significantly better than placebo (relative benefit 3.6, 95% confidence interval 2.4 to 5.6; number needed to treat 2.1, 1.7 to 2.8). Six double blind placebo controlled trials had information on 429 patients with chronic conditions. Topical salicylate was significantly better than placebo (relative benefit 1.5, 1.3 to 1.9; number needed to treat 5.3, 3.6 to 10.2), but larger, more valid studies were without significant effect. Local adverse events and withdrawals were generally rare in trials that reported them. Conclusions Based on limited information, topically applied rubefacients containing salicylates may be efficacious in the treatment of acute pain. Trials of musculoskeletal and arthritic pain suggested moderate to poor efficacy. Adverse events were rare in studies of acute pain and poorly reported in those of chronic pain. Efficacy estimates for rubefacients are unreliable owing to a lack of good clinical trials. PMID:15033879

  14. Using the Horse Grimace Scale (HGS) to Assess Pain Associated with Acute Laminitis in Horses (Equus caballus).

    PubMed

    Dalla Costa, Emanuela; Stucke, Diana; Dai, Francesca; Minero, Michela; Leach, Matthew C; Lebelt, Dirk

    2016-01-01

    Acute laminitis is a common equine disease characterized by intense foot pain, both acutely and chronically. The Obel grading system is the most widely accepted method for describing the severity of laminitis by equine practitioners, however this method requires movement (walk and trot) of the horse, causing further intense pain. The recently developed Horse Grimace Scale (HGS), a facial-expression-based pain coding system, may offer a more effective means of assessing the pain associated with acute laminitis. The aims of this study were: to investigate whether HGS can be usefully applied to assess pain associated with acute laminitis in horses at rest, and to examine if scoring HGS using videos produced similar results as those obtained from still images. Ten horses, referred as acute laminitis cases with no prior treatment, were included in the study. Each horse was assessed using the Obel and HGS (from images and videos) scales: at the admission (before any treatment) and at seven days after the initial evaluation and treatment. The results of this study suggest that HGS is a potentially effective method to assess pain associated with acute laminitis in horses at rest, as horses showing high HGS scores also exhibited higher Obel scores and veterinarians classified them in a more severe painful state. Furthermore, the inter-observer reliability of the HGS total score was good for both still images and video evaluation. There was no significant difference in HGS total scores between the still images and videos, suggesting that there is a possibility of applying the HGS in clinical practice, by observing the horse for a short time. However, further validation studies are needed prior to applying the HGS in a clinical setting. PMID:27527224

  15. An overview of animal models of pain: disease models and outcome measures

    PubMed Central

    Gregory, N; Harris, AL; Robinson, CR; Dougherty, PM; Fuchs, PN; Sluka, KA

    2013-01-01

    Pain is ultimately a perceptual phenomenon. It is built from information gathered by specialized pain receptors in tissue, modified by spinal and supraspinal mechanisms, and integrated into a discrete sensory experience with an emotional valence in the brain. Because of this, studying intact animals allows the multidimensional nature of pain to be examined. A number of animal models have been developed, reflecting observations that pain phenotypes are mediated by distinct mechanisms. Animal models of pain are designed to mimic distinct clinical diseases to better evaluate underlying mechanisms and potential treatments. Outcome measures are designed to measure multiple parts of the pain experience including reflexive hyperalgesia measures, sensory and affective dimensions of pain and impact of pain on function and quality of life. In this review we discuss the common methods used for inducing each of the pain phenotypes related to clinical pain syndromes, as well as the main behavioral tests for assessing pain in each model. PMID:24035349

  16. Dental impaction pain model as a potential tool to evaluate drugs with efficacy in neuropathic pain.

    PubMed

    Malmstrom, Kerstin; Kotey, Paul; McGratty, Megan; Ramakrishnan, Rohini; Gottesdiener, Keith; Reicin, Alise; Wagner, John A

    2006-08-01

    Intravenous lidocaine, a nonspecific Na-channel blocker, was used to assess the dental impaction model for evaluation of neuropathic pain drugs. Sixty patients, experiencing moderate or severe pain after removal of > or = 2 third molars, were randomized (2:2:1:1) to lidocaine (4 mg/kg; maximal dose 300 mg), oxycodone/acetaminophen (10/650 mg), placebo, and active placebo (diphenhydramine, 50 mg). Lidocaine provided a modest degree of pain relief. Predefined endpoints of total pain relief and sum of pain intensity at 2, 4, and 6 hours showed numerically, not statistically significantly, greater pain relief versus placebo. A significantly greater effect over placebo was observed in peak effect and at shorter time points (30 minutes and 1 hour), consistent with the pharmacokinetic profile (plasma concentration of approximately 2 mug/mL). Oxycodone/acetaminophen provided significantly greater analgesia versus placebo, validating study conduct, and significantly greater pain relief was observed versus lidocaine, which is consistent with a smaller portion of dental extraction pain being of neuropathic origin. PMID:16855076

  17. Ghosts in the Machine. Interoceptive Modeling for Chronic Pain Treatment.

    PubMed

    Di Lernia, Daniele; Serino, Silvia; Cipresso, Pietro; Riva, Giuseppe

    2016-01-01

    Pain is a complex and multidimensional perception, embodied in our daily experiences through interoceptive appraisal processes. The article reviews the recent literature about interoception along with predictive coding theories and tries to explain a missing link between the sense of the physiological condition of the entire body and the perception of pain in chronic conditions, which are characterized by interoceptive deficits. Understanding chronic pain from an interoceptive point of view allows us to better comprehend the multidimensional nature of this specific organic information, integrating the input of several sources from Gifford's Mature Organism Model to Melzack's neuromatrix. The article proposes the concept of residual interoceptive images (ghosts), to explain the diffuse multilevel nature of chronic pain perceptions. Lastly, we introduce a treatment concept, forged upon the possibility to modify the interoceptive chronic representation of pain through external input in a process that we call interoceptive modeling, with the ultimate goal of reducing pain in chronic subjects. PMID:27445681

  18. Ghosts in the Machine. Interoceptive Modeling for Chronic Pain Treatment

    PubMed Central

    Di Lernia, Daniele; Serino, Silvia; Cipresso, Pietro; Riva, Giuseppe

    2016-01-01

    Pain is a complex and multidimensional perception, embodied in our daily experiences through interoceptive appraisal processes. The article reviews the recent literature about interoception along with predictive coding theories and tries to explain a missing link between the sense of the physiological condition of the entire body and the perception of pain in chronic conditions, which are characterized by interoceptive deficits. Understanding chronic pain from an interoceptive point of view allows us to better comprehend the multidimensional nature of this specific organic information, integrating the input of several sources from Gifford's Mature Organism Model to Melzack's neuromatrix. The article proposes the concept of residual interoceptive images (ghosts), to explain the diffuse multilevel nature of chronic pain perceptions. Lastly, we introduce a treatment concept, forged upon the possibility to modify the interoceptive chronic representation of pain through external input in a process that we call interoceptive modeling, with the ultimate goal of reducing pain in chronic subjects. PMID:27445681

  19. Prevent Back Pain

    MedlinePlus

    ... Back Pain Print This Topic En español Prevent Back Pain Browse Sections The Basics Overview Am I at ... Health: Back Pain . There are different types of back pain. Back pain can be acute or chronic. It ...

  20. [The multivector nature of relief of acute and chronic pain and necessity of using pain coping strategies].

    PubMed

    Yakupov, E Z; Yakupova, S P; Muslimova, E A

    2015-01-01

    The paper is devoted to the urgent problem of pain syndromes of multimodal character developed in different pathologies. The diagnosis and treatment of pain is frequently complicated by nociceptive, neuropathic and dysfunctional components. Special attention is drawn to the dysfunctional component and its relation to depression. In this context, the authors consider psychological aspects of pain syndrome formation and methods of treatment using pharmacological medications and pain-coping strategies as well. Different coping strategies of active and passive pain-coping styles depending on sex, personality features, nosologic forms are presented. The necessity of using the active coping-strategies to relieve pain of different genesis is highlighted. PMID:26978501

  1. Combined neuromodulatory interventions in acute experimental pain: assessment of melatonin and non-invasive brain stimulation

    PubMed Central

    da Silva, Nádia Regina Jardim; Laste, Gabriela; Deitos, Alícia; Stefani, Luciana Cadore; Cambraia-Canto, Gustavo; Torres, Iraci L. S.; Brunoni, Andre R.; Fregni, Felipe; Caumo, Wolnei

    2015-01-01

    Transcranial direct current stimulation (tDCS) and melatonin can effectively treat pain. Given their potentially complementary mechanisms of action, their combination could have a synergistic effect. Thus, we tested the hypothesis that compared to the control condition and melatonin alone, tDCS combined with melatonin would have a greater effect on pain modulatory effect, as assessed by quantitative sensory testing (QST) and by the pain level during the Conditioned Pain Modulation (CPM)-task. Furthermore, the combined treatment would have a greater cortical excitability effect as indicated by the transcranial magnetic stimulation (TMS) and on the serum BDNF level. Healthy males (n = 20), (aged 18–40 years), in a blinded, placebo-controlled, crossover, clinical trial, were randomized into three groups: sublingual melatonin (0.25 mg/kg) + a-tDCS, melatonin (0.25 mg/kg) + sham-(s)-tDCS, or sublingual placebo+sham-(s)-tDCS. Anodal stimulation (2 mA, 20 min) was applied over the primary motor cortex. There was a significant difference in the heat pain threshold (°C) for melatonin+a-tDCS vs. placebo+s-tDCS (mean difference: 4.86, 95% confidence interval [CI]: 0.9 to 8.63) and melatonin+s-tDCS vs. placebo+s-tDCS (mean: 5.16, 95% CI: 0.84 to 8.36). There was no difference between melatonin+s-tDCS and melatonin+a-tDCS (mean difference: 0.29, 95% CI: −3.72 to 4.23). The mean change from the baseline on amplitude of motor evocate potential (MEP) was significantly higher in the melatonin+a-tDCS (−19.96% ± 5.2) compared with melatonin+s-tDCS group (−1.36% ± 5.35) and with placebo+s-tDCS group (3.61% ± 10.48), respectively (p < 0.05 for both comparisons). While melatonin alone or combined with a-tDCS did not significantly affect CPM task result, and serum BDNF level. The melatonin effectively reduced pain; however, its association with a-tDCS did not present an additional modulatory effect on acute induced pain. PMID:25873871

  2. Diclofenac evaluated in a human experimental model of central pain.

    PubMed

    Björkman, R; Elam, M

    1993-08-01

    The putative central analgesic activity of diclofenac was investigated in a human experimental pain model using intraneural electrical stimulation in the median nerve. Since pain is induced proximal to the peripheral nociceptors, the model can be used to test central analgesic properties of i.a. pharmacological interventions performed during series of repeated stimulations. A single intravenous dose of 50 mg diclofenac or saline was administered during an ongoing series of painful intraneural stimulations in a double-blind cross-over study in 10 healthy volunteers. Neither diclofenac nor saline caused any significant change in the level of pain experienced during stimulation. Thus, no central analgesic effect of diclofenac could be demonstrated in this model. The stability of individual visual analogue scale (VAS) scores throughout the experimental sessions, also after administration of the potent peripheral analgesic agent diclofenac, underlines the validity of intraneural stimulation as a central pain model in humans. PMID:8233534

  3. Fast Left Prefrontal rTMS Acutely Suppresses Analgesic Effects of Perceived Controllability on the Emotional Component of Pain Experience

    PubMed Central

    Borckardt, Jeffrey J.; Reeves, Scott T.; Frohman, Heather; Madan, Alok; Jensen, Mark P.; Patterson, David; Barth, Kelly; Smith, A. Richard; Gracely, Richard; George, Mark S.

    2010-01-01

    The prefrontal cortex may be a promising target for transcranial magnetic stimulation (TMS) in the management of pain. It is not clear how prefrontal TMS affects pain perception, but previous findings suggest that ventral lateral and medial prefrontal circuits may comprise an important part of a circuit of ‘perceived controllability’ regarding pain, stress and learned helplessness. While the left dorsolateral prefrontal cortex is a common TMS target for treating clinical depression as well as modulating pain, little is known about whether TMS over this area may affect perceived controllability. The present study explored the immediate effects of fast TMS over the left dorsolateral prefrontal cortex on the analgesic effects of perceived pain controllability. Twenty-four healthy volunteers underwent a laboratory pain task designed to manipulate perception of pain controllability. Real TMS, compared to sham, suppressed the analgesic benefits of perceived-control on the emotional dimension of pain, but not the sensory/discriminatory dimension. Findings suggest that, at least acutely, fast TMS over the left dorsolateral prefrontal cortex may interrupt the perceived-controllability effect on the emotional dimension of pain experience. While it is not clear whether this cortical area is directly involved with modulating perceived controllability or whether downstream effects are responsible for the present findings, it appears possible that left dorsolateral prefrontal TMS may produce analgesic effects by acting through a cortical ‘perceived control’ circuit regulating limbic and brainstem areas of the pain circuit. PMID:21122992

  4. Teaching a Machine to Feel Postoperative Pain: Combining High-Dimensional Clinical Data with Machine Learning Algorithms to Forecast Acute Postoperative Pain

    PubMed Central

    Tighe, Patrick J.; Harle, Christopher A.; Hurley, Robert W.; Aytug, Haldun; Boezaart, Andre P.; Fillingim, Roger B.

    2015-01-01

    Background Given their ability to process highly dimensional datasets with hundreds of variables, machine learning algorithms may offer one solution to the vexing challenge of predicting postoperative pain. Methods Here, we report on the application of machine learning algorithms to predict postoperative pain outcomes in a retrospective cohort of 8071 surgical patients using 796 clinical variables. Five algorithms were compared in terms of their ability to forecast moderate to severe postoperative pain: Least Absolute Shrinkage and Selection Operator (LASSO), gradient-boosted decision tree, support vector machine, neural network, and k-nearest neighbor, with logistic regression included for baseline comparison. Results In forecasting moderate to severe postoperative pain for postoperative day (POD) 1, the LASSO algorithm, using all 796 variables, had the highest accuracy with an area under the receiver-operating curve (ROC) of 0.704. Next, the gradient-boosted decision tree had an ROC of 0.665 and the k-nearest neighbor algorithm had an ROC of 0.643. For POD 3, the LASSO algorithm, using all variables, again had the highest accuracy, with an ROC of 0.727. Logistic regression had a lower ROC of 0.5 for predicting pain outcomes on POD 1 and 3. Conclusions Machine learning algorithms, when combined with complex and heterogeneous data from electronic medical record systems, can forecast acute postoperative pain outcomes with accuracies similar to methods that rely only on variables specifically collected for pain outcome prediction. PMID:26031220

  5. Acute Abdominal Pain after Intercourse: Adrenal Hemorrhage as the First Sign of Metastatic Lung Cancer

    PubMed Central

    Packer, Clifford D.

    2014-01-01

    Although the adrenal glands are a common site of cancer metastases, they are often asymptomatic and discovered incidentally on CT scan or autopsy. Spontaneous adrenal hemorrhage associated with metastatic lung cancer is an exceedingly rare phenomenon, and diagnosis can be difficult due to its nonspecific symptoms and ability to mimic other intra-abdominal pathologies. We report a case of a 65-year-old man with a history of right upper lobectomy seven months earlier for stage IB non-small cell lung cancer who presented with acute abdominal pain after intercourse. CT scan revealed a new right adrenal mass with surrounding hemorrhage, and subsequent FDG-PET scan confirmed new metabolic adrenal metastases. The patient's presentation of abdominal pain and adrenal hemorrhage immediately after sexual intercourse suggests that exertion, straining, or increased intra-abdominal pressure might be risk factors for precipitation of hemorrhage in patients with adrenal metastases. Management includes pain control and supportive treatment in mild cases, with arterial embolization or adrenalectomy being reserved for cases of severe hemorrhage. PMID:25126096

  6. Use of spinal manipulation in a rheumatoid patient presenting with acute thoracic pain: a case report

    PubMed Central

    Chung, Chadwick L. R.; Mior, Silvano A.

    2015-01-01

    Background: There is limited research related to spinal manipulation of uncomplicated thoracic spine pain and even less when pain is associated with comorbid conditions such as rheumatoid arthritis. In the absence of trial evidence, clinical experience and appropriate selection of the type of intervention is important to informing the appropriate management of these cases. Case presentation: We present a case of a patient with long standing rheumatoid arthritis who presented with acute thoracic pain. The patient was diagnosed with costovertebral joint dysfunction and a myofascial strain of the surrounding musculature. The patient was unresponsive to treatment involving a generalized manipulative technique; however, improved following the administration of a specific applied manipulation with modified forces. The patient was deemed recovered and discharged with ergonomic and home care recommendations. Discussion: This case demonstrates a clinical situation where there is a paucity of research to guide management, thus clinicians must rely on experience and patient preferences in the selection of an appropriate and safe therapeutic intervention. The case highlights the need to contextualize the apparent contraindication of manipulation in patients with rheumatoid arthritis and calls for further research. Finally the paper advances evidence based decision making that balances the available research, clinical experience, as well as patient preferences. PMID:26136606

  7. Transient Receptor Potential Vanilloid-1 in Epidermal Keratinocytes May Contribute to Acute Pain in Herpes Zoster.

    PubMed

    Han, Sang Bum; Kim, Hyeree; Cho, Sang Hyun; Lee, Jeong Deuk; Chung, Jin Ho; Kim, Hei Sung

    2016-03-01

    The role of transient receptor potential vanilloid-1 (TRPV1) in the initiation of neurogenic inflammation and transduction of pain is well established. In this study 33 patients with herpes zoster (HZ) were recruited from a single centre and underwent a questionnaire interview at their first visit. Punch biopsies from the HZ lesions and the contralateral unaffected skin were performed to localize and quantify the expression of TRPV1. Immunofluorescent staining for TRPV1 was most prominent in the epidermal keratinocytes. Both TRPV1 mRNA and protein levels were significantly higher in the HZ epidermis than in control epidermis (relative ratio 1.62 ± 0.27, p = 0.033 and 2.55 ± 0.51, p = 0.005, respectively). Protein TRPV1 ratio (HZ lesion/control) correlated with the degree of pain (measured on a visual analogue scale; VAS) (p = 0.017) and was significantly lower in patients who had taken either HZ medication or painkillers prior to their visit. These results suggest that non-neuronal TRPV1 may contribute to acute pain in herpes zoster. PMID:26390894

  8. Bone scintigraphy in acute renal failure with severe loin pain and patchy renal vasoconstriction.

    PubMed

    Han, J S; Kim, Y G; Kim, S; Lee, M C; Lee, J S; Kim, S H

    1991-01-01

    To evaluate the patterns of renal images and the diagnostic value as a screening test of the whole-body bone and renal scintigraphy with technetium-99m-methylene diphosphonate (99mTc-MDP) or -pyrophosphate (99mTc-PYP), we performed bone scintigraphy in 6 patients with acute renal failure (ARF) with severe loin pain and patchy renal vasoconstriction on postcontrast renal computed tomography (CT). All 6 patients were young and previously healthy but experienced severe loin pain after track events. Five took analgesics. Postcontrast renal CT showed patchy low-density areas or diffuse enhancement immediately after radiocontrast injection and then patchy wedge-shaped enhancement 24 or 48 h later, which subsequently disappeared 72 h later. On the whole-body bone scintigrams with 99mTc-MDP or 99mTc-PYP before obtaining renal CT, there was no increased uptake of isotope in the soft tissue, and multiple patchy increased accumulations of the isotope in the kidney were observed in 5 patients. In 2 patients, renal scintigraphies with technetium-99m-dimercaptosuccinate showed photon-deficient areas in the same areas of patchy isotope accumulation in the whole-body bone scintigraphies. Whole-body image and renal scintigraphy with bone-seeking agents may be useful as a screening test and in the search for the theoretical evidence of ARF with severe loin pain and patchy renal vasoconstriction. PMID:1835520

  9. Treatment with Adenosine Receptor Agonist Ameliorates Pain Induced by Acute and Chronic Inflammation.

    PubMed

    Montes, Guilherme Carneiro; Hammes, Nathalia; da Rocha, Miguel Divino; Montagnoli, Tadeu Lima; Fraga, Carlos Alberto Manssour; Barreiro, Eliezer J; Sudo, Roberto Takashi; Zapata-Sudo, Gisele

    2016-08-01

    Rheumatoid arthritis is an inflammatory autoimmune condition, and tumor necrosis factor-α (TNF-α) plays an important role in its pathophysiology. In vitro, (E)-N'-(3,4-dimethoxybenzylidene)-N-methylbenzohydrazide (LASSBio-1359) has exhibited anti-TNF-α properties, and in vivo these effects are mediated via activation of adenosine receptor. This work investigates the antinociceptive action of LASSBio-1359 in murine models of acute and chronic inflammatory pain. Male mice received an intraperitoneal injection of LASSBio-1359 and then were evaluated in formalin- and carrageenan-induced paw edema assays. Complete Freund's adjuvant (CFA) was used to induce a mouse model of monoarthritis. These mice were treated with LASSBio-1359 by oral gavage to evaluate thermal and mechanical hyperalgesia. TNF-α and inducible nitric oxide synthase (iNOS) expression as well as histologic features were analyzed. The time of reactivity to formalin in the neurogenic phase was reduced from 56.3 ± 6.0 seconds to 32.7 ± 2.2 seconds and 23.8 ± 2.6 seconds after treatment with LASSBio-1359 at doses of 10 mg/kg and 20 mg/kg, respectively. A reversal of the antinociceptive action of LASSBio-1359 was observed in the inflammatory phase after treatment with ZM 241385 [4-(2-[7-amino-2-(2-furly)[1,2,4]triazolo[2,3-a][1,3,5]triazin-5-ylamino]ethyl)phenol], an adenosine A2A antagonist. Carrageenan-induced thermal and mechanical hyperalgesia were reduced after treatment with LASSBio-1359. Similarly, CFA-induced thermal and mechanical hyperalgesia were reduced after treatment with LASSBio-1359 (25 and 50 mg/kg). Levels of TNF-α and iNOS expression increased in the monoarthritis model and were normalized in animals treated with LASSBio-1359, which was also associated with beneficial effects in the histologic analysis. These results suggest that LASSBio-1359 represents an alternative treatment of monoarthritis. PMID:27194479

  10. Think twice - Diagnostic delay in a patient with acute chest pain.

    PubMed

    Bang, Cæcilie Larsen; Porsbjerg, Celeste Michala

    2016-01-01

    Heart involvement is the most critical and potentially lethal systemic manifestation in eosinophilic granulomatosis with polyangiitis (EGPA). We present a case of acute chest pain in a 58-year-old male with severe asthma, which regressed after sublingual administration of nitroglycerine. At the time of hospital admission, there were non-specific ST-changes on the ecg, coronary enzymes were increased, and the patient was concluded to have a non-ST-elevation myocardial infarction, and treated as such. A subacute cardiac catheterization showed no signs of significant coronary stenosis. During the next days, there was increasing pain and reduced strength in both feet. Paraclinical imaging and neurological examinations could not explain the symptoms, and physiotherapy was initiated. At the time, no connection to patient's diagnosis of severe asthma was made. The patient was seen in the respiratory outpatient clinic for a routine check-up, three weeks after the initial hospital admission. At this point, there was increasing pain in both legs and the patient had difficulty walking and experienced increasing dyspnea. Blood eosinophils were elevated (12.7 × 10(9)/L), and an acute HRCT scan showed bilateral peribronchial infiltrates with ground glass opacification and small noduli. A diagnosis of EGPA was established, and administration of systemic glucocorticoids was initiated. A year and a half later, there is still reduced strength and sensory loss. This case illustrates that it is important to consider alternative diagnoses in patients with atypical symptoms and a low risk profile. Heart involvement is the most critical and potentially lethal systemic manifestation in eosinophilic granulomatosis with polyangiitis (EGPA, formerly known as Churg-Strauss syndrome), which makes a quick diagnosis and prompt initiation of correct treatment imperative. PMID:27625985

  11. Thai perspectives on pain.

    PubMed

    Mongkhonthawornchai, Siriporn; Sangchart, Bumpenchit; Sornboon, Ariya; Chantarasiri, Jongkolnee

    2013-09-01

    This qualitative research aimed to study the meaning, the characteristics, and the dimensions of pain from a Thai point of view. It was conducted under the research project on the development of the quality of pain management for people in the hospital. The subjects were 62 patients, experiencing pain and receiving treatment in 4 hospitals in northeast Thailand. Data were analyzed through content analysis. The findings included: 1) concept from experience of pain, perceived pain as suffering physically and psychologically, 2) different characteristics between acute and chronic pain, 3) four levels of pain intensity: mild, moderate, high and severe, 4) pain effects on four dimensions: physical, psychological, behavioral and societal (family-social-economy), 5) two factors related to pain: alleviating factor and predisposing factor, and 6) pain management relies on beliefs, culture and religion i.e. good deeds in Buddhism affected six dimensions: physical, psychological, social, spiritual, treatment seeking and asking health personnel for help. The results of the present study revealed the influence of culture beliefs on the meaning of pain, pain characteristics, and the effects of pain as well as pain management in terms of cultural contexts. The findings may be implemented for the development of pain assessment and the model development of pain management more appropriately according to cultural contexts. PMID:24386747

  12. Circulating microRNA Signatures in Rodent Models of Pain.

    PubMed

    Qureshi, Rehman A; Tian, Yuzhen; McDonald, Marguerite K; Capasso, Kathryn E; Douglas, Sabrina R; Gao, Ruby; Orlova, Irina A; Barrett, James E; Ajit, Seena K; Sacan, Ahmet

    2016-07-01

    MicroRNAs (miRNAs) remain stable in circulation and have been identified as potential biomarkers for a variety of conditions. We report miRNA changes in blood from multiple rodent models of pain, including spinal nerve ligation and spared nerve injury models of neuropathic pain; a complete Freund's adjuvant (CFA) model of inflammatory pain; and a chemotherapy-induced model of pain using the histone deacetylase inhibitor JNJ-26481585. The effect of celecoxib, a cyclooxygenase-2-selective nonsteroidal anti-inflammatory drug, was investigated in the CFA model as proof of principle for assessing the utility of circulating miRNAs as biomarkers in determining treatment response. Each study resulted in a unique miRNA expression profile. Despite differences in miRNAs identified from various models, computational target prediction and functional enrichment have identified biological pathways common among different models. The Wnt signaling pathway was affected in all models, suggesting a crucial role for this pathway in the pathogenesis of pain. Our studies demonstrate the utility of circulating miRNAs as pain biomarkers and suggest the potential for rigorous forward and reverse translational approaches. Evaluating alterations in miRNA fingerprints under different pain conditions and after administering therapeutic agents may be beneficial in evaluating clinical trial outcomes, predicting treatment response, and developing correlational outcomes between preclinical and human studies. PMID:26081151

  13. Descending pain modulation and chronification of pain

    PubMed Central

    Ossipov, Michael H.; Morimura, Kozo; Porreca, Frank

    2015-01-01

    Purpose of review Chronic pain is an important public health problem that negatively impacts quality of life of affected individuals and exacts an enormous socio-economic cost. Currently available therapeutics provide inadequate management of pain in many patients. Acute pain states generally resolve in most patients. However, for reasons that are poorly understood, in some individuals, acute pain can transform to a chronic state. Our understanding of the risk factors that underlie the development of chronic pain is limited. Recent studies have suggested an important contribution of dysfunction in descending pain modulatory circuits to pain ‘chronification’. Human studies provide insights into possible endogenous and exogenous factors that may promote the conversion of pain into a chronic condition. Recent findings Descending pain modulatory systems have been studied and characterized in animal models. Human brain imaging techniques, deep brain stimulation and the mechanisms of action of drugs that are effective in the treatment of pain confirm the clinical relevance of top-down pain modulatory circuits. Growing evidence supports the concept that chronic pain is associated with a dysregulation in descending pain modulation. Disruption of the balance of descending modulatory circuits to favour facilitation may promote and maintain chronic pain. Recent findings suggest that diminished descending inhibition is likely to be an important element in determining whether pain may become chronic. This view is consistent with the clinical success of drugs that enhance spinal noradrenergic activity, such as serotonin/norepinephrine reuptake inhibitors (SNRIs), in the treatment of chronic pain states. Consistent with this concept, a robust descending inhibitory system may be normally engaged to protect against the development of chronic pain. Imaging studies show that higher cortical and subcortical centres that govern emotional, motivational and cognitive processes

  14. Symptom control in end-of-life care: pain, eating, acute illnesses, panic attacks, and aggressive care.

    PubMed

    Lamers, William M

    2005-01-01

    This feature is based on actual questions and answers adapted from a service provided by the Hospice Foundation of America. Queries addressing the propriety of managing acute medical conditions in patients enrolled in a terminal care program and the mistaken belief that death from cancer is always painful are provided. Questions included in this set address management of acute medical conditions during end-of-life care, the lack of inevitability of pain with cancer, nutrition in advanced disease, managing panic attacks, and appropriate care for a dying 90 year old gentleman. PMID:16431836

  15. Prescribing Opioid Analgesics for Acute Dental Pain: Time to Change Clinical Practices in Response to Evidence and Misperceptions.

    PubMed

    Dionne, Raymond A; Gordon, Sharon M; Moore, Paul A

    2016-06-01

    As the nation comes to terms with a prescription opioid epidemic, dentistry is beginning to understand its own unintentional contribution and seek ways to address it. The article urges dental providers to reexamine entrenched prescribing habits and thought patterns regarding treatment of acute dental pain. It points to evidence suggesting that nonsteroidal anti-inflammatory drugs are nonaddictive and usually more effective for managing many cases of acute dental pain. The authors provide therapeutic recommendations to help dental providers change prescribing patterns. PMID:27517474

  16. Bifunctional Peptide-Based Opioid Agonist-Nociceptin Antagonist Ligands for Dual Treatment of Acute and Neuropathic Pain.

    PubMed

    Guillemyn, Karel; Starnowska, Joanna; Lagard, Camille; Dyniewicz, Jolanta; Rojewska, Ewelina; Mika, Joanna; Chung, Nga N; Utard, Valérie; Kosson, Piotr; Lipkowski, Andrzej W; Chevillard, Lucie; Arranz-Gibert, Pol; Teixidó, Meritxell; Megarbane, Bruno; Tourwé, Dirk; Simonin, Frédéric; Przewlocka, Barbara; Schiller, Peter W; Ballet, Steven

    2016-04-28

    Herein, the opioid pharmacophore H-Dmt-d-Arg-Aba-β-Ala-NH2 (7) was linked to peptide ligands for the nociceptin receptor. Combination of 7 and NOP ligands (e.g., H-Arg-Tyr-Tyr-Arg-Ile-Lys-NH2) led to binding affinities in the low nanomolar domain. In vitro, the hybrids behaved as agonists at the opioid receptors and antagonists at the nociceptin receptor. Intravenous administration of hybrid 13a (H-Dmt-d-Arg-Aba-β-Ala-Arg-Tyr-Tyr-Arg-Ile-Lys-NH2) to mice resulted in potent and long lasting antinociception in the tail-flick test, indicating that 13a was able to permeate the BBB. This was further supported by a cell-based BBB model. All hybrids alleviated allodynia and hyperalgesia in neuropathic pain models. Especially with respect to hyperalgesia, they showed to be more effective than the parent compounds. Hybrid 13a did not result in significant respiratory depression, in contrast to an equipotent analgesic dose of morphine. These hybrids hence represent a promising avenue toward analgesics for the dual treatment of acute and neuropathic pain. PMID:27035422

  17. Traumatization and chronic pain: a further model of interaction

    PubMed Central

    Egloff, Niklaus; Hirschi, Anna; von Känel, Roland

    2013-01-01

    Up to 80% of patients with severe posttraumatic stress disorder are suffering from “unexplained” chronic pain. Theories about the links between traumatization and chronic pain have become the subject of increased interest over the last several years. We will give a short summary about the existing interaction models that emphasize particularly psychological and behavioral aspects of this interaction. After a synopsis of the most important psychoneurobiological mechanisms of pain in the context of traumatization, we introduce the hypermnesia–hyperarousal model, which focuses on two psychoneurobiological aspects of the physiology of learning. This hypothesis provides an answer to the hitherto open question about the origin of pain persistence and pain sensitization following a traumatic event and also provides a straightforward explanatory model for educational purposes. PMID:24231792

  18. Traumatization and chronic pain: a further model of interaction.

    PubMed

    Egloff, Niklaus; Hirschi, Anna; von Känel, Roland

    2013-01-01

    Up to 80% of patients with severe posttraumatic stress disorder are suffering from "unexplained" chronic pain. Theories about the links between traumatization and chronic pain have become the subject of increased interest over the last several years. We will give a short summary about the existing interaction models that emphasize particularly psychological and behavioral aspects of this interaction. After a synopsis of the most important psychoneurobiological mechanisms of pain in the context of traumatization, we introduce the hypermnesia-hyperarousal model, which focuses on two psychoneurobiological aspects of the physiology of learning. This hypothesis provides an answer to the hitherto open question about the origin of pain persistence and pain sensitization following a traumatic event and also provides a straightforward explanatory model for educational purposes. PMID:24231792

  19. The role of gaseous neurotransmitters in the antinociceptive effects of morphine during acute thermal pain.

    PubMed

    Gou, Gemma; Leánez, Sergi; Pol, Olga

    2014-08-15

    Treatment with a carbon monoxide-releasing molecule (tricarbonyldichlororuthenium(II) dimer, CORM-2) or a classical inducible heme oxygenase (HO-1) inducer (cobalt protoporphyrin IX, CoPP) enhanced the antinociceptive effects of morphine during chronic pain but the role played by these compounds in acute thermal nociception was not evaluated. The effects of CORM-2 and CoPP treatments on the local antinociceptive actions of morphine and their interactions with nitric oxide during acute pain were evaluated by using wild type (WT), neuronal (nNOS-KO) or inducible (iNOS-KO) nitric oxide synthase knockout mice and assessing their thermal nociception to a hot stimulus with the hot plate test. Our results showed that the absence of nNOS or iNOS genes did not alter licking and jumping responses nor the antinociceptive effects produced by morphine indicating that the local thermal inhibitory effects produced by this drug in the absence of inflammation or injury are not mediated by the nitric oxide pathway triggered by nNOS or iNOS enzymes. Moreover, while the systemic administration of CORM-2 or CoPP inhibited licking and jumping latencies in all genotypes, these treatments only enhanced the local inhibition of jumping latencies produced by morphine in WT and nNOS-KO mice which effects were reversed by the peripheral administration of an HO-1 inhibitor. These data indicate that the co-administration of morphine with CORM-2 or CoPP produced remarkable local antinociceptive effects in WT and nNOS-KO mice and reveal that a significant interaction between carbon monoxide and nitric oxide systems occurs on the local antinociceptive effects produced by morphine during acute thermal nociception. PMID:24846012

  20. Persistent Pain Model Reveals Sex Difference in Morphine Potency

    PubMed Central

    Wang, Xiaoya; Traub, Richard J.; Murphy, Anne Z.

    2010-01-01

    Central or systemic administration of agonists directed at the mu or delta opiate receptors generally produce a greater degree of analgesia in males than in females. To date, the majority of studies examining sex based differences in opioid analgesia have employed acute noxious stimuli (i.e. tail-flick and hot plate test); thus, the potential dimorphic response of centrally acting opiates in the alleviation of persistent inflammatory pain is not well established. In the present study, right hindpaw withdrawal latency (PWL) to radiant thermal stimuli was measured in intact male and cycling female Sprague-Dawley rats before and after unilateral hindpaw injection of the inflammatory agent complete Freund’s adjuvant (CFA). Control animals received intraplantar injection of saline. Twenty four hours after CFA or saline injection, animals received either saline or morphine bisulfate (0.5 – 15 mg/kg; s.c.). Separate groups of control or inflamed animals were tested on their responsiveness to morphine at 7, 14 and 21 days post-CFA or saline. No sex differences were noted for baseline PWLs, and females displayed slightly less thermal hyperalgesia at 24 hrs post-CFA. At all morphine doses administered, both the antihyperalgesic effects of morphine in the inflamed animals, and the antinociceptive effects of morphine in control animals, were significantly greater in males in comparison to females. Similarly, in males, the antihyperalgesic effects of morphine increased significantly at 7–21 days post-CFA; no significant shift in morphine potency was noted for females. These studies demonstrate sex-based differences in the effects of morphine on thermal hyperalgesia in a model of persistent inflammatory pain. PMID:16497818

  1. Cortical activity evoked by an acute painful tissue-damaging stimulus in healthy adult volunteers

    PubMed Central

    Williams, Gemma; Lee, Amy; Meek, Judith; Slater, Rebeccah; Olhede, Sofia; Fitzgerald, Maria

    2013-01-01

    Everyday painful experiences are usually single events accompanied by tissue damage, and yet most experimental studies of cutaneous nociceptive processing in the brain use repeated laser, thermal, or electrical stimulations that do not damage the skin. In this study the nociceptive activity in the brain evoked by tissue-damaging skin lance was analyzed with electroencephalography (EEG) in 20 healthy adult volunteers (13 men and 7 women) aged 21–40 yr. Time-frequency analysis of the evoked activity revealed a distinct late event-related vertex potential (lance event-related potential, LERP) at 100–300 ms consisting of a phase-locked energy increase between 1 and 20 Hz (delta-beta bands). A pairwise comparison between lance and sham control stimulation also revealed a period of ultralate stronger desynchronization after lance in the delta band (1–5 Hz). Skin application of mustard oil before lancing, which sensitizes a subpopulation of nociceptors expressing the cation channel TRPA1, did not affect the ultralate desynchronization but reduced the phase-locked energy increase in delta and beta bands, suggesting a central interaction between different modalities of nociceptive inputs. Verbal descriptor screening of individual pain experience revealed that lance pain is predominantly due to Aδ fiber activation, but when individuals describe lances as C fiber mediated, an ultralate delta band event-related desynchronization occurs in the brain-evoked activity. We conclude that pain evoked by acute tissue damage is associated with distinct Aδ and C fiber-mediated patterns of synchronization and desynchronization of EEG oscillations in the brain. PMID:23427303

  2. Incident reporting by acute pain service at a tertiary care university hospital

    PubMed Central

    Ahmed, Aliya; Yasir, Muhammad

    2015-01-01

    Background and Aims: Provision of effective and safe postoperative pain management is the principal responsibility of acute pain services (APSs). Continuous quality assurance is essential for high-quality patient care. We initiated anonymous reporting of critical incidents by APS to ensure continuous quality improvement and here present prospectively collected data on the reported incidents. Our objective was to analyze the frequency and nature of incidents and to see if any harm was caused to patients. Material and Methods: Data were collected from January 1, 2012 to September 30, 2013. An incident related to pain management was defined as An incident that occurs in a patient receiving pain management supervised by APS, and causes or has the potential to cause harm or affects patient safety. A form was filled including incident type, personnel involved, any harm caused, and steps taken to rectify it. Frequencies and percentages were computed for categorical variables. Results: A total of 2042 patients were seen and 442 (21.64%) incidents reported during the study period, including documentation errors (136/31%), noncompliance with protocols (113/25.56%), wrong combination of drugs (56/12.66%), premature discontinuation (74/16.72%), prolonged delays in change of syringes (27/6.10%), loss to follow-up (19/4.29%), administration of contraindicated drugs (9/2.03%), catheter pull-outs (6/1.35%), and faulty equipment (2/0.45%). Steps were taken to rectify the errors accordingly. No harm was caused to any patient. Conclusion: Reporting of untoward incidents and their regular analysis by APS is recommended to ensure high-quality patient care and to provide guidance in making teaching strategies and guidelines to improve patient safety. PMID:26702208

  3. Seasonal variations of acute appendicitis and nonspecific abdominal pain in Finland

    PubMed Central

    Ilves, Imre; Fagerström, Anne; Herzig, Karl-Heinz; Juvonen, Petri; Miettinen, Pekka; Paajanen, Hannu

    2014-01-01

    AIM: To investigate whether seasonal changes had an effect on the incidence of acute appendicitis (AA) or nonspecific abdominal pain (NSAP). METHODS: We carried out a national register study of all patients with a hospital discharge diagnosis of AA and acute NSAP in Finland. Data were analyzed for the whole country and correlated to seasonal and weather parameters (temperature, humidity). Moreover, additional sub-analyses were performed for five geographically different area of Finland. RESULTS: The observation period spanned 21 years, with 186558 appendectomies, of which 137528 (74%) cases were reported as AA. The incidence of AA declined for 32% over the study period. The average incidence of the NSAP was 34/10000 per year. The mean annual temperature, but not relative humidity, showed clear geographical variations. The incidence of AA decreased significantly during the cold months of the year. No correlation was detected between temperature and incidence of NSAP. Humidity had a statistically significant impact on NSAP. CONCLUSION: The incidence of acute appendicitis is declining in Finland. We detected a clear seasonality in the incidence of AA and NSAP. PMID:24833844

  4. Acupuncture in acute herpes zoster pain therapy (ACUZoster) – design and protocol of a randomised controlled trial

    PubMed Central

    Fleckenstein, Johannes; Kramer, Sybille; Hoffrogge, Philipp; Thoma, Sarah; Lang, Philip M; Lehmeyer, Lukas; Schober, Gabriel M; Pfab, Florian; Ring, Johannes; Weisenseel, Peter; Schotten, Klaus J; Mansmann, Ulrich; Irnich, Dominik

    2009-01-01

    Background Acute herpes zoster is a prevalent condition. One of its major symptoms is pain, which can highly influence patient's quality of life. Pain therapy is limited. Acupuncture is supposed to soften neuropathic pain conditions and might therefore act as a therapeutic alternative. Objective of the present study is to investigate whether a 4 week semi-standardised acupuncture is non-inferior to sham laser acupuncture and the anticonvulsive drug gabapentine in the treatment of pain associated with herpes zoster. Methods/Design Three-armed, randomised, placebo-controlled trial with a total follow-up time of 6 months. Up to estimated 336 patients (interim analyses) with acute herpes zoster pain (VAS > 30 mm) will be randomised to one of three groups (a) semi-standardised acupuncture (168 patients); (b) gabapentine with individualised dosage between 900–3600 mg/d (84 patients); (c) sham laser acupuncture. Intervention takes place over 4 weeks, all patients will receive analgesic therapy (non-opioid analgesics: metamizol or paracetamol and opioids: tramadol or morphine). Therapy phase includes 4 weeks in which group (a) and (c) consist of 12 sessions per patient, (b) visits depend on patients needs. Main outcome measure is to assess the alteration of pain intensity before and 1 week after treatment sessions (visual analogue scale VAS 0–100 mm). Secondary outcome measure are: alteration of pain intensity and frequency of pain attacks; alteration of different aspects of pain evaluated by standardised pain questionnaires (NPI, PDI, SES); effects on quality of life (SF 36); analgesic demand; alteration of sensoric perception by systematic quantitative sensory testing (QST); incidence of postherpetic neuralgia; side effects and cost effectiveness. Credibility of treatments will be assessed. Discussion This study is the first large-scale randomised placebo controlled trial to evaluate the efficacy of acupuncture compared to gabapentine and sham treatment and will

  5. Effective management of intractable neuropathic pain using an intrathecal morphine pump in a patient with acute transverse myelitis

    PubMed Central

    Wu, Wei-Ting; Huang, Yu-Hui; Chen, Der-Cherng; Huang, Yu-Hsuan; Chou, Li-Wei

    2013-01-01

    Transverse myelitis is a rare inflammatory myelopathy characterized by loss of motor and sensory function below the affected level of the spinal cord, and causes neurogenic bowel and bladder. Occasionally, it also causes neuropathic pain with spasticity. Traditional therapies for neuropathic pain are multiple, including multimodal analgesic regimens, antiepileptic or antidepressant medications, opioids, sympathetic blocks, and spinal cord stimulation. Persistent neuropathic pain can cause emotional distress by affecting sleep, work, recreation, and emotional well-being. Here we report the case of a patient suffering from intractable neuropathic pain following acute transverse myelitis that was not relieved by combinations of nonsteroidal anti-inflammatory, anti-epileptic, antidepressant, and opioid medications, or by acupuncture. Implantation of an intrathecal morphine pump controlled the pain successfully without side effects, and enabled the patient to embark on intensive rehabilitation. The patient’s muscle strength has improved significantly and the patient may soon be able to use a walker with minimal assistance. PMID:23935366

  6. Supra-additive effects of tramadol and acetaminophen in a human pain model.

    PubMed

    Filitz, Jörg; Ihmsen, Harald; Günther, Werner; Tröster, Andreas; Schwilden, Helmut; Schüttler, Jürgen; Koppert, Wolfgang

    2008-06-01

    The combination of analgesic drugs with different pharmacological properties may show better efficacy with less side effects. Aim of this study was to examine the analgesic and antihyperalgesic properties of the weak opioid tramadol and the non-opioid acetaminophen, alone as well as in combination, in an experimental pain model in humans. After approval of the local Ethics Committee, 17 healthy volunteers were enrolled in this double-blind and placebo-controlled study in a cross-over design. Transcutaneous electrical stimulation at high current densities (29.6+/-16.2 mA) induced spontaneous acute pain (NRS=6 of 10) and distinct areas of hyperalgesia for painful mechanical stimuli (pinprick-hyperalgesia). Pain intensities as well as the extent of the areas of hyperalgesia were assessed before, during and 150 min after a 15 min lasting intravenous infusion of acetaminophen (650 mg), tramadol (75 mg), a combination of both (325 mg acetaminophen and 37.5mg tramadol), or saline 0.9%. Tramadol led to a maximum pain reduction of 11.7+/-4.2% with negligible antihyperalgesic properties. In contrast, acetaminophen led to a similar pain reduction (9.8+/-4.4%), but a sustained antihyperalgesic effect (34.5+/-14.0% reduction of hyperalgesic area). The combination of both analgesics at half doses led to a supra-additive pain reduction of 15.2+/-5.7% and an enhanced antihyperalgesic effect (41.1+/-14.3% reduction of hyperalgesic areas) as compared to single administration of acetaminophen. Our study provides first results on interactions of tramadol and acetaminophen on experimental pain and hyperalgesia in humans. Pharmacodynamic modeling combined with the isobolographic technique showed supra-additive effects of the combination of acetaminophen and tramadol concerning both, analgesia and antihyperalgesia. The results might act as a rationale for combining both analgesics. PMID:17709207

  7. Preoperative dexamethasone reduces acute but not sustained pain after lumbar disk surgery: a randomized, blinded, placebo-controlled trial.

    PubMed

    Nielsen, Rikke V; Siegel, Hanna; Fomsgaard, Jonna S; Andersen, Johnny D H; Martusevicius, Robertas; Mathiesen, Ole; Dahl, Jørgen B

    2015-12-01

    Glucocorticoids have attracted increasing attention as adjuvants in the treatment of acute postoperative pain. Furthermore, anecdotal reports may support glucocorticoids for preventing sustained postoperative pain. We explored preoperative dexamethasone combined with paracetamol and ibuprofen on acute and sustained pain after lumbar disk surgery. In this blinded study, 160 patients undergoing lumbar disk surgery were randomly assigned to 16 mg IV dexamethasone or placebo. All patients received perioperative paracetamol and ibuprofen, and postoperative IV patient-controlled analgesia with morphine. Primary outcome was pain during mobilization (visual analog scale) 2 to 24 hours postoperatively. Secondary outcomes were acute pain at rest, morphine consumption, nausea, vomiting, ondansetron consumption, sedation, and quality of sleep. Patients were followed up by written questionnaire 3 months postoperatively. Acute pain during mobilization (weighted average area under the curve, 2-24 hours) was significantly reduced in the dexamethasone group: 33 (22) mm vs placebo 43 (18) mm, (95% confidence interval [CI] 3-16) P = 0.005. Vomiting 0 to 24 hours postoperatively was reduced in the dexamethasone group (17 episodes) vs placebo (51 episodes) P = 0.036. No other differences were observed. However, 6.5% (95% CI 2-15) in the dexamethasone group vs placebo 0% had an antibiotically treated wound infection (P = 0.13). Sixteen percent (95% CI 7-26) vs 8% (95% CI 0-17) reported new weakness/paralysis of the legs in the dexamethasone and placebo groups, respectively, 3 months postoperatively (P = 0.20). In conclusion, preoperative dexamethasone significantly reduced pain during mobilization and vomiting, after lumbar disk surgery. No significant effects were observed 3 months postoperatively. PMID:26270586

  8. Longitudinal Multilevel Modeling of Facial Pain, Muscle Tension, and Stress.

    PubMed

    Glaros, A G; Marszalek, J M; Williams, K B

    2016-04-01

    The role of masticatory muscle activation on pain in temporomandibular muscle and joint disorders (TMJD) is controversial. This single-group, prospective panel study examined the relationships among masticatory muscle tension, emotional distress, and TMJD pain in a sample of 7,023 observations obtained from 171 individuals using longitudinal multilevel modeling. Three main hypotheses were tested. The first posited that emotional distress and muscle tension directly influenced pain (hypothesis 1a: Distress → TMJD Pain; hypothesis 1b: Muscle Tension → TMJD Pain). The second posited that emotional distress directly influenced muscle tension (Distress → Muscle Tension), and the third posited that the effect of emotional distress on pain was mediated by muscle tension (Distress → Muscle Tension → TMJD pain). We also examined the fit of the data to possible alternative models. All the data used in this study were collected via an experience sampling methodology. The fit of the preferred models was better than that of the alternative models, with the preferred models explaining large proportions of the data, especially for level 2 variance (hypothesis 1a = 41% variance; hypothesis 1b = 69% variance; hypothesis 2 = 48% variance). In the mediation model, the addition of muscle tension to the model reduced the impact of emotional distress. The findings support a causal role for masticatory muscle tension in TMJD pain. Clinically, the results suggest that addressing tension and other oral parafunctions in those diagnosed with TMJDs should be an important part of the conservative, noninvasive care of individuals diagnosed with the myofascial pain or arthralgia of TMJD. PMID:26758381

  9. Quercetin Inhibits Peripheral and Spinal Cord Nociceptive Mechanisms to Reduce Intense Acute Swimming-Induced Muscle Pain in Mice.

    PubMed

    Borghi, Sergio M; Pinho-Ribeiro, Felipe A; Fattori, Victor; Bussmann, Allan J C; Vignoli, Josiane A; Camilios-Neto, Doumit; Casagrande, Rubia; Verri, Waldiceu A

    2016-01-01

    The present study aimed to evaluate the effects of the flavonoid quercetin (3,3´,4´,5,7-pentahydroxyflavone) in a mice model of intense acute swimming-induced muscle pain, which resembles delayed onset muscle soreness. Quercetin intraperitoneal (i.p.) treatment dose-dependently reduced muscle mechanical hyperalgesia. Quercetin inhibited myeloperoxidase (MPO) and N-acetyl-β-D- glucosaminidase (NAG) activities, cytokine production, oxidative stress, cyclooxygenase-2 (COX-2) and gp91phox mRNA expression and muscle injury (creatinine kinase [CK] blood levels and myoblast determination protein [MyoD] mRNA expression) as well as inhibited NFκB activation and induced Nrf2 and HO-1 mRNA expression in the soleus muscle. Beyond inhibiting those peripheral effects, quercetin also inhibited spinal cord cytokine production, oxidative stress and glial cells activation (glial fibrillary acidic protein [GFAP] and ionized calcium-binding adapter molecule 1 [Iba-1] mRNA expression). Concluding, the present data demonstrate that quercetin is a potential molecule for the treatment of muscle pain conditions related to unaccustomed exercise. PMID:27583449

  10. Procaine Attenuates Pain Behaviors of Neuropathic Pain Model Rats Possibly via Inhibiting JAK2/STAT3

    PubMed Central

    Li, Donghua; Yan, Yurong; Yu, Lingzhi; Duan, Yong

    2016-01-01

    Neuropathic pain (NPP) is the main culprit among chronic pains affecting the normal life of patients. Procaine is a frequently-used local anesthesia with multiple efficacies in various diseases. However, its role in modulating NPP has not been reported yet. This study aims at uncovering the role of procaine in NPP. Rats were pretreated with procaine by intrathecal injection. Then NPP rat model was induced by sciatic nerve chronic compression injury (CCI) and behavior tests were performed to analyze the pain behaviors upon mechanical, thermal and cold stimulations. Spinal expression of Janus kinase 2 (JAK2) and signal transducer and activator of transcription 3 (STAT3) was detected by qRT-PCR and western blot. JAK2 was also overexpressed in procaine treated model rats for behavior tests. Results showed that procaine pretreatment improved the pain behaviors of model rats upon mechanical, thermal and cold stimulations, with the best effect occurring on the 15th day post model construction (p<0.05). Procaine also inhibited JAK2 and STAT3 expression in both mRNA (p<0.05) and protein levels. Overexpression of JAK2 increased STAT3 level and reversed the improvement effects of procaine in pain behaviors (p<0.01). These findings indicate that procaine is capable of attenuating NPP, suggesting procaine is a potential therapeutic strategy for treating NPP. Its role may be associated with the inhibition on JAK2/STAT3 signaling. PMID:27530113

  11. The Effect of a Clinical Practice Guideline for Acute Pelvic Pain on Length of Stay in the Emergency Department.

    PubMed

    Goff, Dana Humes; Klima, Carrie

    2015-01-01

    Length of stay (LOS) is a key measure of emergency department (ED) efficiency and a marker of overcrowding. The use of clinical practice guidelines (CPGs) has been shown to decrease the time spent in the ED. The objective of this study was to determine whether the utilization of a CPG for evaluation of acute pelvic pain in the ED would reduce patient LOS. This before-and-after study was conducted at a large urban Level II ED over the course of 2 years. A retrospective review of 134 electronic patient records: 67 charts prior to protocol implementation; 67 after implementation of a CPG for the evaluation of acute pelvic pain. Length of stay was based on the time from triage to discharge. The before-and-after protocol groups were compared using an independent-samples t test. Length of stay was actually increased in the protocol group (n = 67, M = 5:16, SD = 4:14 [hr:min]; p = 0.092). The use of diagnostic imaging was associated with longer LOS, varying with the specific imaging performed. Because of financial restructuring, the radiology unit reduced the availability of in-house sonography to 9:00 a.m.-5:00 p.m., Monday through Friday, which also possibly affected the LOS. Of significance was the willingness of the health care providers to utilize the CPG (86%). Time of day, availability of in-house ultrasound, and individual provider judgment influence ED LOS and subsequent imaging performed. Future research is necessary to determine how these and other factors can be incorporated into a model for predicting LOS, reducing provider disparities, and ensuring patient safety. PMID:26218488

  12. Pain assessment in animal models: do we need further studies?

    PubMed Central

    Gigliuto, Carmelo; De Gregori, Manuela; Malafoglia, Valentina; Raffaeli, William; Compagnone, Christian; Visai, Livia; Petrini, Paola; Avanzini, Maria Antonietta; Muscoli, Carolina; Viganò, Jacopo; Calabrese, Francesco; Dominioni, Tommaso; Allegri, Massimo; Cobianchi, Lorenzo

    2014-01-01

    In the last two decades, animal models have become important tools in understanding and treating pain, and in predicting analgesic efficacy. Although rodent models retain a dominant role in the study of pain mechanisms, large animal models may predict human biology and pharmacology in certain pain conditions more accurately. Taking into consideration the anatomical and physiological characteristics common to man and pigs (median body size, digestive apparatus, number, size, distribution and communication of vessels in dermal skin, epidermal–dermal junctions, the immunoreactivity of peptide nerve fibers, distribution of nociceptive and non-nociceptive fiber classes, and changes in axonal excitability), swines seem to provide the most suitable animal model for pain assessment. Locomotor function, clinical signs, and measurements (respiratory rate, heart rate, blood pressure, temperature, electromyography), behavior (bright/quiet, alert, responsive, depressed, unresponsive), plasma concentration of substance P and cortisol, vocalization, lameness, and axon reflex vasodilatation by laser Doppler imaging have been used to assess pain, but none of these evaluations have proved entirely satisfactory. It is necessary to identify new methods for evaluating pain in large animals (particularly pigs), because of their similarities to humans. This could lead to improved assessment of pain and improved analgesic treatment for both humans and laboratory animals. PMID:24855386

  13. Pain assessment in animal models: do we need further studies?

    PubMed

    Gigliuto, Carmelo; De Gregori, Manuela; Malafoglia, Valentina; Raffaeli, William; Compagnone, Christian; Visai, Livia; Petrini, Paola; Avanzini, Maria Antonietta; Muscoli, Carolina; Viganò, Jacopo; Calabrese, Francesco; Dominioni, Tommaso; Allegri, Massimo; Cobianchi, Lorenzo

    2014-01-01

    In the last two decades, animal models have become important tools in understanding and treating pain, and in predicting analgesic efficacy. Although rodent models retain a dominant role in the study of pain mechanisms, large animal models may predict human biology and pharmacology in certain pain conditions more accurately. Taking into consideration the anatomical and physiological characteristics common to man and pigs (median body size, digestive apparatus, number, size, distribution and communication of vessels in dermal skin, epidermal-dermal junctions, the immunoreactivity of peptide nerve fibers, distribution of nociceptive and non-nociceptive fiber classes, and changes in axonal excitability), swines seem to provide the most suitable animal model for pain assessment. Locomotor function, clinical signs, and measurements (respiratory rate, heart rate, blood pressure, temperature, electromyography), behavior (bright/quiet, alert, responsive, depressed, unresponsive), plasma concentration of substance P and cortisol, vocalization, lameness, and axon reflex vasodilatation by laser Doppler imaging have been used to assess pain, but none of these evaluations have proved entirely satisfactory. It is necessary to identify new methods for evaluating pain in large animals (particularly pigs), because of their similarities to humans. This could lead to improved assessment of pain and improved analgesic treatment for both humans and laboratory animals. PMID:24855386

  14. Differential analgesic effects of morphine and gabapentin on behavioural measures of pain and disability in a model of osteoarthritis pain in rats.

    PubMed

    Vonsy, Jean Laurent; Ghandehari, Javid; Dickenson, Anthony Henry

    2009-09-01

    Osteoarthritis (OA) is associated with chronic debilitating joint pain. Pain is the result of an emotional and sensory experience and preclinical models of OA can thus be useful to better understand the underlying mechanisms of the disease and test new therapeutic options. We induced unilateral knee OA in Sprague-Dawley rats using monosodium iodoacetate (MIA), a glycolysis inhibitor and assessed the effects of acute and chronic morphine and gabapentin using a battery of quantitative behavioural outcome measures of pain and disability. Animals received a single intra-articular injection of 2mg MIA in 25 microl saline, causing inflammation and progressive cartilage degradation. Mechanical and thermal sensitivity as well as ambulatory-evoked pain were then monitored using von Frey hairs, acetone and a rotarod. Once maximum nociceptive responses were reached, chronic bi-daily morphine (3mg/kg s.c.) or gabapentin (30 mg/kg s.c.) were administered for 5 days. We observed a marked biphasic mechanical hypersensitivity that increased and reached a plateau from day 14 (317.6% of control response, p<0.01, with von Frey 6g). Moreover we found a marked cooling hypersensitivity, and validated a novel ambulatory-evoked pain score. These measures were significantly reduced after both acute (13.3% of sham response, p<0.01, von Frey 6g) and chronic (38.3%, p<0.05) morphine whilst only chronic gabapentin (37.0%, p<0.05) had an effect. We show the reliability of the model in terms of mechanical hypersensitivity and demonstrate cooling hypersensitivity and ambulatory-evoked pain. In terms of translational research, the effects of morphine and gabapentin validate the model and suggest trials of these therapeutic approaches in OA patients. PMID:18955000

  15. Profile of extended-release oxycodone/acetaminophen for acute pain

    PubMed Central

    Bekhit, Mary Hanna

    2015-01-01

    This article provides a historical and pharmacological overview of a new opioid analgesic that boasts an extended-release (ER) formulation designed to provide both immediate and prolonged analgesia for up to 12 hours in patients who are experiencing acute pain. This novel medication, ER oxycodone/acetaminophen, competes with current US Food and Drug Administration (FDA)-approved opioid formulations available on the market in that it offers two benefits concurrently: a prolonged duration of action, and multimodal analgesia through a combination of an opioid (oxycodone) with a nonopioid component. Current FDA-approved combination analgesics, such as Percocet (oxycodone/acetaminophen), are available solely in immediate-release (IR) formulations. PMID:26527898

  16. MEDUSA: a fuzzy expert system for medical diagnosis of acute abdominal pain.

    PubMed

    Fathi-Torbaghan, M; Meyer, D

    1994-12-01

    Even today, the diagnosis of acute abdominal pain represents a serious clinical problem. The medical knowledge in this field is characterized by uncertainty, imprecision and vagueness. This situation lends itself especially to be solved by the application of fuzzy logic. A fuzzy logic-based expert system for diagnostic decision support is presented (MEDUSA). The representation and application of uncertain and imprecise knowledge is realized by fuzzy sets and fuzzy relations. The hybrid concept of the system enables the integration of rule-based, heuristic and case-based reasoning on the basis of imprecise information. The central idea of the integration is to use case-based reasoning for the management of special cases, and rule-based reasoning for the representation of normal cases. The heuristic principle is ideally suited for making uncertain, hypothetical inferences on the basis of fuzzy data and fuzzy relations. PMID:7869951

  17. Acute painful paraplegia in a 49-year-old man with allergic asthma.

    PubMed

    Sorino, Claudio; Agati, Sergio; Milani, Giuseppe; Maspero, Annarosa

    2014-01-01

    We present a case of a 49-year-old man, with a 10-year history of bronchial asthma and nasal polyposis, who developed acutely painful paraplegia and paresthesias. Laboratory data showed elevated blood creatine kinase levels and myoglobinuria, which were diagnostic for rhabdomyolysis but only partially explained the neurological deficit. Electrophysiological studies revealed a sensorimotor neuropathy of multiple mononeuritis type. The patient also had leucocytosis with marked eosinophilia and antineutrophil cytoplasmic autoantibodies. Bronchial biopsies showed inflammatory infiltrates with a prevalence of eosinophils. All these findings led us to diagnose eosinophilic granulomatosis with polyangiitis, a systemic vasculitis with almost constant respiratory tract involvement and good response to corticosteroid treatment. This can also affect other organs including the nervous system, while muscular involvement is unusual. Some diseases deserve attention in differential diagnosis. Histology can support the diagnosis which remains essentially clinical. Steroid sparing agents/immunosuppressants are suggested for extensive disease. PMID:24980994

  18. Evaluation of milnacipran, in comparison with amitriptyline, on cold and mechanical allodynia in a rat model of neuropathic pain.

    PubMed

    Berrocoso, Esther; Mico, Juan-Antonio; Vitton, Olivier; Ladure, Philippe; Newman-Tancredi, Adrian; Depoortère, Ronan; Bardin, Laurent

    2011-03-25

    Milnacipran, a serotonin/norepinephrine reuptake inhibitor (SNRI), has shown efficacy against several chronic pain conditions, including fibromyalgia. Here, we evaluated, in rats, its anti-allodynic effects following acute or sub-chronic treatment in a model of neuropathic pain (chronic constriction injury, CCI, of the sciatic nerve). Amitriptyline, a tricyclic antidepressant active pre-clinically and clinically against neuropathic pains, was added as a comparison compound. Upon acute i.p. administration, milnacipran was potently efficacious in the CCI model. It significantly reduced thermal allodynia in the cold (4°C) plate test (MED=2.5mg/kg), and attenuated mechanical allodynia in the von Frey filaments test (MED=10mg/kg). Given sub-chronically (7day, b.i.d.), milnacipran was effective at 10mg/kgi.p. in both tests. Acute amitriptyline (10mg/kgi.p.) was efficacious against mechanical, but less so against cold allodynia; under sub-chronic conditions, it was only active against mechanical allodynia. These data show that milnacipran is as efficacious as the reference compound amitriptyline in a pre-clinical model of injury-induced neuropathy, and demonstrate for the first time that it is active acutely and sub-chronically against cold allodynia. They also suggest that milnacipran has the potential to alleviate allodynia associated with nerve compression-induced neuropathic pain in the clinic (for example following discal hernia, avulsion or cancer-induced tissue damage). PMID:21277295

  19. The Sciatic Nerve Cuffing Model of Neuropathic Pain in Mice

    PubMed Central

    Yalcin, Ipek; Megat, Salim; Barthas, Florent; Waltisperger, Elisabeth; Kremer, Mélanie; Salvat, Eric; Barrot, Michel

    2014-01-01

    Neuropathic pain arises as a consequence of a lesion or a disease affecting the somatosensory system. This syndrome results from maladaptive changes in injured sensory neurons and along the entire nociceptive pathway within the central nervous system. It is usually chronic and challenging to treat. In order to study neuropathic pain and its treatments, different models have been developed in rodents. These models derive from known etiologies, thus reproducing peripheral nerve injuries, central injuries, and metabolic-, infectious- or chemotherapy-related neuropathies. Murine models of peripheral nerve injury often target the sciatic nerve which is easy to access and allows nociceptive tests on the hind paw. These models rely on a compression and/or a section. Here, the detailed surgery procedure for the "cuff model" of neuropathic pain in mice is described. In this model, a cuff of PE-20 polyethylene tubing of standardized length (2 mm) is unilaterally implanted around the main branch of the sciatic nerve. It induces a long-lasting mechanical allodynia, i.e., a nociceptive response to a normally non-nociceptive stimulus that can be evaluated by using von Frey filaments. Besides the detailed surgery and testing procedures, the interest of this model for the study of neuropathic pain mechanism, for the study of neuropathic pain sensory and anxiodepressive aspects, and for the study of neuropathic pain treatments are also discussed. PMID:25078668

  20. Antinociceptive effects of vitexin in a mouse model of postoperative pain

    PubMed Central

    Zhu, Qing; Mao, Li-Na; Liu, Cheng-Peng; Sun, Yue-Hua; Jiang, Bo; Zhang, Wei; Li, Jun-Xu

    2016-01-01

    Vitexin, a C-glycosylated flavone present in several medicinal herbs, has showed various pharmacological activities including antinociception. The present study investigated the antinociceptive effects of vitexin in a mouse model of postoperative pain. This model was prepared by making a surgical incision on the right hindpaw and von Frey filament test was used to assess mechanical hyperalgesia. Isobolographical analysis method was used to examine the interaction between vitexin and acetaminophen. A reliable mechanical hyperalgesia was observed at 2 h post-surgery and lasted for 4 days. Acute vitexin administration (3–10 mg/kg, i.p.) dose-dependently relieved this hyperalgesia, which was also observed from 1 to 3 days post-surgery during repeated daily treatment. However, repeated vitexin administration prior to surgery had no preventive value. The 10 mg/kg vitexin-induced antinociception was blocked by the opioid receptor antagonist naltrexone or the GABAA receptor antagonist bicuculline. The doses of vitexin used did not significantly suppress the locomotor activity. In addition, the combination of vitexin and acetaminophen produced an infra-additive effect in postoperative pain. Together, though vitexin-acetaminophen combination may not be useful for treating postoperative pain, vitexin exerts behaviorally-specific antinociception against postoperative pain mediated through opioid receptors and GABAA receptors, suggesting that vitexin may be useful for the control of postoperative pain. PMID:26763934

  1. Rethinking the Psychogenic Model of Complex Regional Pain Syndrome: Somatoform Disorders and Complex Regional Pain Syndrome

    PubMed Central

    Hill, Renee J.; Chopra, Pradeep; Richardi, Toni

    2012-01-01

    Abstract Explaining the etiology of Complex Regional Pain Syndrome (CRPS) from the psychogenic model is exceedingly unsophisticated, because neurocognitive deficits, neuroanatomical abnormalities, and distortions in cognitive mapping are features of CRPS pathology. More importantly, many people who have developed CRPS have no history of mental illness. The psychogenic model offers comfort to physicians and mental health practitioners (MHPs) who have difficulty understanding pain maintained by newly uncovered neuro inflammatory processes. With increased education about CRPS through a biopsychosocial perspective, both physicians and MHPs can better diagnose, treat, and manage CRPS symptomatology. PMID:24223338

  2. The Algoplus Score to Assess Acute Postoperative pain in Elderly patients-A Pilot Observational Study.

    PubMed

    Dualé, Christian; Pereira, Bruno; Abbal, Bertrand; Julien, Hugues; Rat, Patrice; Schoeffler, Pierre; Pickering, Gisèle

    2015-12-01

    Standard verbal or analogue scales may not be accurate to assess acute postoperative pain in elderly patients. This study was designed to field test the Algoplus tool, developed specifically for this population and based on observation of patient behavior. Prospective, observational cohort. Single center, French University hospital. Forty-eight patients, aged over 65, scheduled for surgery under general anesthesia, and observed on admission to the postanesthesia care unit, immediately after extubation, during the different steps of analgesic intervention (demand, relief with intravenous opioid titration, plus intermediate measures when relevant), and either at discharge or 3 hours after admission. A numerical rating scale (NRS) was used to guide analgesia. The Algoplus score and the state of alertness or sedation were noted. NRS scores and Algoplus scores were significantly related, and both scores significantly decreased under the effect of analgesia, but the correlation was low. In early observations, the Algoplus score was higher than that predicted by the NRS score, in relation to residual sedation. Female gender tended to lower the Algoplus score compared to the NRS score. When the NRS score exceeded 3/10, indicating the need for analgesic intervention, the Algoplus score was generally lower than the recommended trigger for analgesia (2/5). These results are promising, but further evidence of a clinical benefit to the use of Algoplus for acute postoperative pain is needed. In future studies, scoring should be adjusted to take into account the time from extubation, the state of sedation, and the patient's gender in order to interpret results. PMID:26697817

  3. Incident reporting in post-operative patients managed by acute pain service

    PubMed Central

    Hasan, Syeda Fauzia; Hamid, Mohammad

    2015-01-01

    Background and Aims: Incident reporting is a reliable and inexpensive tool used in anaesthesia to identify errors in patient management. A hospital incident reporting system was already present in our hospital, but we were unable to find any incident related to acute pain management. Hence, acute pain service (APS) was started for voluntary incident reporting in post-operative patients to identify critical incidents, review the root cause and suggest remedial measures. Methods: All post-operative patients managed by APS were included in this observational study. A proforma was developed by APS, which included information about the type of incident (equipment and patient-related, human errors), severity of incident, person responsible and suggestions to prevent the same incident in the future. Patients and medical staff were informed about the reporting system. Whenever an incident was identified, a proforma was filled out by APS resident and data entered in SPSS programme. Results: Total of 98 (1.80%) incidents were reported in 5432 patients managed by APS during 3 years period. Average age of the patients was 46 ± 17 years. Majority of incidents were related to epidural care (71%) and occurred in surgical wards (87%). Most of the incidents occurred due to human error and infusion delivery set-related defects. Conclusion: Incident reporting proved to be a feasible method of improving quality care in developing countries. It not only provides valuable information about areas which needed improvement, but also helped in developing strategies to improve care. Knowledge and attitudes of medical and paramedical staff are identified as the targeted area for improvement. PMID:26903672

  4. The Mu Opioid Receptor A118G Gene Polymorphism Moderates Effects of Trait Anger-Out on Acute Pain Sensitivity

    PubMed Central

    Bruehl, Stephen; Chung, Ok Y.; Burns, John W.

    2008-01-01

    Both trait anger-in (managing anger through suppression) and anger-out (managing anger through direct expression) are related to pain responsiveness, but only anger-out effects involve opioid mechanisms. Preliminary work suggested the effects of anger-out on post-operative analgesic requirements were moderated by the A118G single nucleotide polymorphism of the mu opioid receptor gene. This study further explored these potential genotype X phenotype interactions as they impact acute pain sensitivity. Genetic samples and measures of anger-in and anger-out were obtained in 87 subjects (from three studies) who participated in controlled laboratory acute pain tasks (ischemic, finger pressure, thermal). McGill Pain Questionnaire (MPQ) Sensory and Affective ratings for each pain task were standardized within studies, aggregated across pain tasks, and combined for analyses. Significant anger-out X A118G interactions were observed (p’s<.05). Simple effects tests for both pain measures revealed that whereas anger-out was nonsignificantly hyperalgesic in subjects homozygous for the wild-type allele, anger-out was significantly hypoalgesic in those with the variant G allele (p’s<.05). For the MPQ-Affective measure, this interaction arose both from low pain sensitivity in high anger-out subjects with the G allele and heightened pain sensitivity in low anger-out subjects with the G allele relative to responses in homozygous wild-type subjects. No genetic moderation was observed for anger-in, although significant main effects on MPQ-Affective ratings were noted (p<.005). Anger-in main effects were due to overlap with negative affect, but anger-out X A118G interactions were not, suggesting unique effects of expressive anger regulation. Results support opioid-related genotype X phenotype interactions involving trait anger-out. PMID:18579306

  5. The Design and Methods of Genetic Studies on Acute and Chronic Postoperative Pain in Patients after Total Knee Replacement

    PubMed Central

    Belfer, Inna; Greco, Carol M.; Lokshin, Anna; Vulakovich, Katie; Landsittel, Douglas; Dai, Feng; Crossett, Lawrence; Chelly, Jacques E.

    2015-01-01

    Objective Total knee replacement (TKR) is the treatment option of choice for the millions of individuals whose osteoarthritis pain can no longer be managed through non-invasive methods. Over 500,000 TKRs are performed annually in the United States. Although most patients report improvement in pain and functioning following TKR, up to 30% report persistent pain that interferes with daily function. However, the reasons for poor outcomes are not clear. To best determine which patients are at risk for pain post TKR, a detailed and comprehensive approach is needed. In this article, we present the methodology of a study designed to identify a set of genetic, proteomic, clinical, demographic, psychosocial, and psychophysical risk factors for severe acute and chronic pain post TKR. Design Prospective longitudinal observational study. Setting University Hospital System. Subjects Patients scheduled for unilateral TKR with a target number of 150. Methods Prior to surgery, we collect demographic, psychosocial, and pain data. Biological data, including blood samples for genetic analyses, and serum, urine, and joint fluid for cytokine assessment are collected intraoperatively. Pain assessments as well as medication use are collected during each of the three days postsurgery. Additionally, pain and psychosocial information is collected 6 and 12 months following surgery. Conclusions This study, for the first time, captures the information on both genetic and “environmental” risk factors for acute and chronic pain post-TKR and has the potential to lead to the next step—multicenter large-scale studies on predictors and biomarkers of poor TKR outcomes as well as on tailored interventions and personalized medicine approaches for those at risk. PMID:25040948

  6. A two-year old boy with recurrent bouts of acute abdominal pain.

    PubMed

    Blom, H; Bochner, A; Vervloessem, D; Desimpelaere, J; Devière, J; Veereman-Wauters, G

    2010-01-01

    In a small number of patients with pancreas divisum (with stenotic minor papilla) a relative obstruction to pancreatic exocrine secretory flow results in pancreatitis. We report a 2-year-old boy presenting with recurrent bouts of abdominal pain. The diagnosis of acute pancreatitis was made based on blood biochemistry results. Ultrasound, computed tomography and magnetic resonance imaging showed several abdominal pseudocysts, peritoneal exsudate and confirmed pancreatitis but initially failed to reveal the aetiology. Ascites and cysts contained pancreatic enzymes. After weeks of combined conservative and surgical treatment, a magnetic resonance cholangiopancreaticography with secretin, showed a pancreas divisum with a cyst between the ducts of Santorini and Wirsung. Based on these findings, two endoscopic papillotomies (minor and major papilla) were performed. Three years follow-up was uneventful. In a child with recurrent pancreatitis or pancreatitis with chronic recurrent abdominal pain it is crucial to search aggressively for congenital abnormalities, including pancreas divisum. Secretin-enhanced magnetic resonance cholangiopancreaticography or diffusion-weighted magnetic resonance imaging is a valuable diagnostic tool for visualizing pancreatic duct anatomy. PMID:21299165

  7. The Implications of Tobacco Smoking on Acute Postoperative Pain: A Prospective Observational Study

    PubMed Central

    Chiang, Han-Liang; Chia, Yuan-Yi; Lin, Huey-Shyan; Chen, Chen-Hsiu

    2016-01-01

    Background. The clinical importance of cigarette smoking on acute postoperative pain perception is not fully understood. Methods. To determine whether smokers who underwent major surgery need more postoperative opiate than do nonsmokers. We prospectively enrolled 407 male and 441 female participants who underwent in-hospital surgery. Current-smokers were compared with nonsmokers and past-smokers about opiate use during the first 72 h after surgery. Results. A greater proportion of males had more smoking history than females. The average age of male current-smokers is smaller than both nonsmokers and past-smokers. The surgical type (upper abdomen, lower abdomen, extremities, spine, and others) and duration of surgery have no differences between current-smokers, past-smokers, and nonsmokers. Statistically, the male current-smokers required more opiate analgesics during the first 72 h following surgery compared with the male nonsmokers and past-smokers; furthermore, the male current-smokers reported higher pain intensity when moving and at rest on day 1 after surgery. Conclusions. In this study, the male current-smokers required more morphine in the first 72 h after surgery than did the nonsmokers and past-smokers. Furthermore, smoking was more prevalent among the males than the females. Health care providers must be aware of the potential for increased narcotic requirements in male current-smokers. PMID:27445634

  8. [The use of nimesulide in the treatment of acute low back pain].

    PubMed

    Shikhkerimov, R K

    2016-01-01

    The objective is to study the efficacy and safety of nimesulide (nemulex) in the treatment of acute low back pain (LBP). The medical documentation of 54 patients with primary syndrome of LBP, which were treated in a polyclinic with nemulex at a dose of 200 mg per day had been studied. The assessment of patients' condition and efficacy and safety of the treatment was conducted based on the information after three visits (1-st, 5-th and 10-th day). The analysis took into account the data of clinical-neurological examination and the assessment of pain intensity at rest and at movement according to the visual analogue scale (VAS) and the severity of Lasegue symptom and limitation of movements in the lumbar spine. Safety of the therapy was evaluated on the basis of accounting of undesirable side reactions and data analysis and physical examination and laboratory testing. Cardiovascular safety was assessed by blood pressure and blood lipid profile on day 10. The use of nemulex at a dose of 200 mg per day resulted in relief of pain and increase of mobility in the lumbar spine on the 5th day of treatment that indicates the effectiveness of anti-inflammatory therapy to restore the previous functional status of patients with LBP. The use of nemulex was accompanied not only by statistically significant analgesic effect (0,78±0,14 points alone; 1,12±0,18 points when moving by VAS on the 10th day of the treatment) and high security (only 1 of the 54 patients was recorded to have elevation of hepatic transaminases; and 2 patients with dyspepsia without endoscopic changes of gastrointestinal tract). PMID:27240177

  9. Use of Therapeutic Neuroscience Education to address psychosocial factors associated with acute low back pain: a case report.

    PubMed

    Zimney, Kory; Louw, Adriaan; Puentedura, Emilio J

    2014-04-01

    Acute low back pain (LBP) from injuries is prevalent in the work place. It has been shown that patients with psychosocial factors often progress with persistent pain and lead to significant workers compensation costs. Therapeutic Neuroscience Education (TNE) has been shown to be beneficial in changing a patient's cognition regarding their pain state, which may result in decrease fear, anxiety and catastrophization. A 19-year-old female who developed LBP from a work injury was the patient for this case report. A physical examination, Numeric Pain Rating Scale (NRPS), Oswestry Disability Index (ODI), Fear-Avoidance Beliefs Questionnaire (FABQ), Keele STarT Back Screening Tool (Keele SBST) and Acute Low Back Pain Screening (ALBPS) Questionnaires were assessed during initial physical therapy visit and discharge. Treatment consisted of use of TNE, manual therapy and exercises. She attended five total visits over a 2-week period prior to full discharge. During the initial visit the patient reported NRPS = 3/10, ODI = 36%, FABQ-PA = 23, FABQ-W = 30, Keele SBST = 4/9, ALBPS = 101. At discharge the patient reported a 0 on all outcome questionnaires with ability to return to full work and no pain complaints. PMID:24252071

  10. Reward and motivation in pain and pain relief

    PubMed Central

    Navratilova, Edita; Porreca, Frank

    2015-01-01

    Pain is fundamentally unpleasant, a feature that protects the organism by promoting motivation and learning. Relief of aversive states, including pain, is rewarding. The aversiveness of pain, as well as the reward from relief of pain, is encoded by brain reward/motivational mesocorticolimbic circuitry. In this Review, we describe current knowledge of the impact of acute and chronic pain on reward/motivation circuits gained from preclinical models and from human neuroimaging. We highlight emerging clinical evidence suggesting that anatomical and functional changes in these circuits contribute to the transition from acute to chronic pain. We propose that assessing activity in these conserved circuits can offer new outcome measures for preclinical evaluation of analgesic efficacy to improve translation and speed drug discovery. We further suggest that targeting reward/motivation circuits may provide a path for normalizing the consequences of chronic pain to the brain, surpassing symptomatic management to promote recovery from chronic pain. PMID:25254980

  11. ACR Appropriateness Criteria® Acute Pelvic Pain in the Reproductive Age Group.

    PubMed

    Andreotti, Rochelle F; Lee, Susanna I; Dejesus Allison, Sandra O; Bennett, Genevieve L; Brown, Douglas L; Dubinsky, Theodore; Glanc, Phyllis; Javitt, Marcia C; Mitchell, Donald G; Podrasky, Ann E; Shipp, Thomas D; Siegel, Cary Lynn; Wong-You-Cheong, Jade J; Zelop, Carolyn M

    2011-09-01

    Premenopausal women who present with acute pelvic pain frequently pose a diagnostic dilemma, exhibiting nonspecific signs and symptoms, the most common being nausea, vomiting, and leukocytosis. Diagnostic considerations encompass multiple organ systems, including obstetric, gynecologic, urologic, gastrointestinal, and vascular etiologies. The selection of imaging modality is determined by the clinically suspected differential diagnosis. Thus, a careful evaluation of such a patient should be performed and diagnostic considerations narrowed before a modality is chosen. Transvaginal and transabdominal pelvic sonography is the modality of choice when an obstetric or gynecologic abnormality is suspected, and computed tomography is more useful when gastrointestinal or genitourinary pathology is more likely. Magnetic resonance imaging, when available in the acute setting, is favored over computed tomography for assessing pregnant patients for nongynecologic etiologies because of the lack of ionizing radiation. The American College of Radiology Appropriateness Criteria are evidence-based guidelines for specific clinical conditions that are reviewed every two years by a multidisciplinary expert panel. The guideline development and review include an extensive analysis of current medical literature from peer reviewed journals and the application of a well-established consensus methodology (modified Delphi) to rate the appropriateness of imaging and treatment procedures by the panel. In those instances where evidence is lacking or not definitive, expert opinion may be used to recommend imaging or treatment. PMID:21873877

  12. Consensus Modeling of Oral Rat Acute Toxicity

    EPA Science Inventory

    An acute toxicity dataset (oral rat LD50) with about 7400 compounds was compiled from the ChemIDplus database. This dataset was divided into a modeling set and a prediction set. The compounds in the prediction set were selected so that they were present in the modeling set used...

  13. Zebrafish Models for Human Acute Organophosphorus Poisoning

    PubMed Central

    Faria, Melissa; Garcia-Reyero, Natàlia; Padrós, Francesc; Babin, Patrick J.; Sebastián, David; Cachot, Jérôme; Prats, Eva; Arick II, Mark; Rial, Eduardo; Knoll-Gellida, Anja; Mathieu, Guilaine; Le Bihanic, Florane; Escalon, B. Lynn; Zorzano, Antonio; Soares, Amadeu M.V.M; Raldúa, Demetrio

    2015-01-01

    Terrorist use of organophosphorus-based nerve agents and toxic industrial chemicals against civilian populations constitutes a real threat, as demonstrated by the terrorist attacks in Japan in the 1990 s or, even more recently, in the Syrian civil war. Thus, development of more effective countermeasures against acute organophosphorus poisoning is urgently needed. Here, we have generated and validated zebrafish models for mild, moderate and severe acute organophosphorus poisoning by exposing zebrafish larvae to different concentrations of the prototypic organophosphorus compound chlorpyrifos-oxon. Our results show that zebrafish models mimic most of the pathophysiological mechanisms behind this toxidrome in humans, including acetylcholinesterase inhibition, N-methyl-D-aspartate receptor activation, and calcium dysregulation as well as inflammatory and immune responses. The suitability of the zebrafish larvae to in vivo high-throughput screenings of small molecule libraries makes these models a valuable tool for identifying new drugs for multifunctional drug therapy against acute organophosphorus poisoning. PMID:26489395

  14. Zebrafish Models for Human Acute Organophosphorus Poisoning.

    PubMed

    Faria, Melissa; Garcia-Reyero, Natàlia; Padrós, Francesc; Babin, Patrick J; Sebastián, David; Cachot, Jérôme; Prats, Eva; Arick Ii, Mark; Rial, Eduardo; Knoll-Gellida, Anja; Mathieu, Guilaine; Le Bihanic, Florane; Escalon, B Lynn; Zorzano, Antonio; Soares, Amadeu M V M; Raldúa, Demetrio

    2015-01-01

    Terrorist use of organophosphorus-based nerve agents and toxic industrial chemicals against civilian populations constitutes a real threat, as demonstrated by the terrorist attacks in Japan in the 1990 s or, even more recently, in the Syrian civil war. Thus, development of more effective countermeasures against acute organophosphorus poisoning is urgently needed. Here, we have generated and validated zebrafish models for mild, moderate and severe acute organophosphorus poisoning by exposing zebrafish larvae to different concentrations of the prototypic organophosphorus compound chlorpyrifos-oxon. Our results show that zebrafish models mimic most of the pathophysiological mechanisms behind this toxidrome in humans, including acetylcholinesterase inhibition, N-methyl-D-aspartate receptor activation, and calcium dysregulation as well as inflammatory and immune responses. The suitability of the zebrafish larvae to in vivo high-throughput screenings of small molecule libraries makes these models a valuable tool for identifying new drugs for multifunctional drug therapy against acute organophosphorus poisoning. PMID:26489395

  15. Back Pain

    MedlinePlus

    ... Awards Enhancing Diversity Find People About NINDS NINDS Back Pain Information Page Condensed from Low Back Pain Fact ... en Español Additional resources from MedlinePlus What is Back Pain? Acute or short-term low back pain generally ...

  16. Comparative Analysis of Pain Behaviours in Humanized Mouse Models of Sickle Cell Anemia.

    PubMed

    Lei, Jianxun; Benson, Barbara; Tran, Huy; Ofori-Acquah, Solomon F; Gupta, Kalpna

    2016-01-01

    Pain is a hallmark feature of sickle cell anemia (SCA) but management of chronic as well as acute pain remains a major challenge. Mouse models of SCA are essential to examine the mechanisms of pain and develop novel therapeutics. To facilitate this effort, we compared humanized homozygous BERK and Townes sickle mice for the effect of gender and age on pain behaviors. Similar to previously characterized BERK sickle mice, Townes sickle mice show more mechanical, thermal, and deep tissue hyperalgesia with increasing age. Female Townes sickle mice demonstrate more hyperalgesia compared to males similar to that reported for BERK mice and patients with SCA. Mechanical, thermal and deep tissue hyperalgesia increased further after hypoxia/reoxygenation (H/R) treatment in Townes sickle mice. Together, these data show BERK sickle mice exhibit a significantly greater degree of hyperalgesia for all behavioral measures as compared to gender- and age-matched Townes sickle mice. However, the genetically distinct "knock-in" strategy of human α and β transgene insertion in Townes mice as compared to BERK mice, may provide relative advantage for further genetic manipulations to examine specific mechanisms of pain. PMID:27494522

  17. Comparative Analysis of Pain Behaviours in Humanized Mouse Models of Sickle Cell Anemia

    PubMed Central

    Lei, Jianxun; Benson, Barbara; Tran, Huy; Ofori-Acquah, Solomon F.; Gupta, Kalpna

    2016-01-01

    Pain is a hallmark feature of sickle cell anemia (SCA) but management of chronic as well as acute pain remains a major challenge. Mouse models of SCA are essential to examine the mechanisms of pain and develop novel therapeutics. To facilitate this effort, we compared humanized homozygous BERK and Townes sickle mice for the effect of gender and age on pain behaviors. Similar to previously characterized BERK sickle mice, Townes sickle mice show more mechanical, thermal, and deep tissue hyperalgesia with increasing age. Female Townes sickle mice demonstrate more hyperalgesia compared to males similar to that reported for BERK mice and patients with SCA. Mechanical, thermal and deep tissue hyperalgesia increased further after hypoxia/reoxygenation (H/R) treatment in Townes sickle mice. Together, these data show BERK sickle mice exhibit a significantly greater degree of hyperalgesia for all behavioral measures as compared to gender- and age-matched Townes sickle mice. However, the genetically distinct “knock-in” strategy of human α and β transgene insertion in Townes mice as compared to BERK mice, may provide relative advantage for further genetic manipulations to examine specific mechanisms of pain. PMID:27494522

  18. Back pain and backpacks in children: biomedical or biopsychosocial model?

    PubMed

    Reneman, M F; Poels, B J J; Geertzen, J H B; Dijkstra, P U

    2006-10-30

    Public press, professional organisations and journals have been sending alarming messages about the rising prevalence of back pain in school age children. Carrying backpacks has been suggested as one of the key factors contributing to back pain in children. The basic assumption based on the biomedical model is that the maturing spine cannot handle the mechanical load of the backpack sufficiently. A review of the evidence in the professional literature, however, revealed very limited evidence to support this assumption. On the contrary, the literature does suggest that psychological and social factors may be of greater importance to explain back pain in children. We conclude this clinical commentary postulating that the public, children and their parents are better served with a more modest and balanced perspective of the professionals, and propose that back pain in children (as it is in adults) should be viewed from a biopsychosocial model. PMID:17023376

  19. H4 receptor antagonism exhibits anti-nociceptive effects in inflammatory and neuropathic pain models in rats.

    PubMed

    Hsieh, Gin C; Chandran, Prasant; Salyers, Anita K; Pai, Madhavi; Zhu, Chang Z; Wensink, Erica J; Witte, David G; Miller, Thomas R; Mikusa, Joe P; Baker, Scott J; Wetter, Jill M; Marsh, Kennan C; Hancock, Arthur A; Cowart, Marlon D; Esbenshade, Timothy A; Brioni, Jorge D; Honore, Prisca

    2010-03-01

    The histamine H(4) receptor (H(4)R) is expressed primarily on cells involved in inflammation and immune responses. To determine the potential role of H(4)R in pain transmission, the effects of JNJ7777120, a potent and selective H(4) antagonist, were characterized in preclinical pain models. Administration of JNJ7777120 fully blocked neutrophil influx observed in a mouse zymosan-induced peritonitis model (ED(50)=17 mg/kg s.c., 95% CI=8.5-26) in a mast cell-dependent manner. JNJ7777120 potently reversed thermal hyperalgesia observed following intraplantar carrageenan injection of acute inflammatory pain (ED(50)=22 mg/kg i.p., 95% CI=10-35) in rats and significantly decreased the myeloperoxide activity in the carrageenan-injected paw. In contrast, no effects were produced by either H(1)R antagonist diphenhydramine, H(2)R antagonists ranitidine, or H(3)R antagonist ABT-239. JNJ7777120 also exhibited robust anti-nociceptive activity in persistent inflammatory (CFA) pain with an ED(50) of 29 mg/kg i.p. (95% CI=19-40) and effectively reversed monoiodoacetate (MIA)-induced osteoarthritic joint pain. This compound also produced dose-dependent anti-allodynic effects in the spinal nerve ligation (ED(50)=60 mg/kg) and sciatic nerve constriction injury (ED(50)=88 mg/kg) models of chronic neuropathic pain, as well as in a skin-incision model of acute post-operative pain (ED(50)=68 mg/kg). In addition, the analgesic effects of JNJ7777120 were maintained following repeated administration and were evident at the doses that did not cause neurologic deficits in rotarod test. Our results demonstrate that selective blockade of H(4) receptors in vivo produces significant anti-nociception in animal models of inflammatory and neuropathic pain. PMID:20004681

  20. The Effect of Acute Intra Locus Coeruleus (LC) Microinfusion of Bupropion on Formalin-Induced Pain Behavior in Rat

    PubMed Central

    Jahanbani, Marzieh; Nasri, Sima; Pakdel, Firouz Ghaderi; Cankurt, Ulker; Shahabi, Parviz; Amirabadi, Sanaz; Naderi, Somayyeh; Osalou, Mostafa Ashrafi

    2014-01-01

    Introduction Inflammatory pain is a common sign of chronic diseases. Some brain regions such as locus coeruleus (LC) of the brainstem nor-epinephrine (NE) system have a key role in The mechanisms of the pain modulation and dependence. Bupropion synthesized as an antidepressant, but it is using for smoke cessation. It can change morphine withdrawal signs such as pain related behaviors. This study tested the acute effect of intra-LC microinfusion of bupropion on the formalin-induced pain behavior in rats. Methods Wistar male rats were divided into 6 groups (control-naïve, control-operated, shamoperated, and 3 treated groups with 10-2, 10-3, 10-4 mol/µl intra-LC of bupropion). The injection guide cannulae were implanted into LC nuclei bilaterally by stereotaxic coordinated surgery under sterile condition. The sham group received normal saline as drug vehicle but control groups had no intra-LC injections. Formalin (50 µl, 2.5%) was injected subcutaneously in plantar region of the right hindpaw in all animals (30 min after drug administration in treated animals). Nociceptive signs were observed continuously and registered on-line each minute. Common pain scoring was used for pain assessment. Results The analysis of data by one-way ANOVA showed that bupropion can reduce pain behavior scores significantly. Bupropion reduced total pain score in the phase 01 (60%) and phase 02 (52%) of maximal behavior compared to the sham group, dose dependently and significantly. The pain scores of controls and sham groups had no significant difference. Discussion The results showed that bupropion has analgesic effects on LC neurons and can alter the neurochemical involvement of LC in pain process. Bupropion has different and significant effect on early and late phases of formalin test. PMID:25436082

  1. Antinociceptive and anti-exudative synergism between dexketoprofen and tramadol in a model of inflammatory pain in mice.

    PubMed

    Miranda, Hugo F; Romero, Maria Asunción; Puig, Margarita M

    2012-06-01

    Preclinical studies have demonstrated antinociceptive synergism between dexketoprofen (DEX) and tramadol (TRM) in acute animal models of nociception. The aim of the present study was to investigate the type of interaction between DEX and TRM in a chronic musculoskeletal pain model in mice, which fairly replicates the characteristics of chronic osteoarticular pain in humans. Inflammation was induced by a subplantar injection of complete Freund's adjuvant (CFA) in male CF1 mice. Nociceptive thresholds were evaluated using the hot plate, the nocifensive spontaneous behavior and the acetone tests, while plasma extravasation (PE) was assessed with Evan's blue. We used the following experimental groups: control (no inflammation), acute (1 day after CFA injection), and chronic inflammation (7 days after CFA). Dose-response curves for DEX and TRM, individually and combined in a 1 : 1 proportion based on their potency were obtained, and the doses that produced a 50% inhibition calculated. The isobolographic analysis revealed that in all groups of study (no inflammation, acute, and chronic inflammation), the combination of DEX : TRM was synergistic, for both the inhibition of nociception and the PE. The results suggest that the DEX : TRM (1 : 1) combination could be useful in the management of acute and chronic inflammatory musculoskeletal pains in humans; in addition, the synergistic interaction between the drugs observed both during acute and chronic inflammation suggests that less doses would be required of each drug to obtain effective analgesia. PMID:22081874

  2. Simultaneous Inhibition of PGE2 and PGI2 Signals Is Necessary to Suppress Hyperalgesia in Rat Inflammatory Pain Models.

    PubMed

    Sugita, Ryusuke; Kuwabara, Harumi; Kubota, Kazufumi; Sugimoto, Kotaro; Kiho, Toshihiro; Tengeiji, Atsushi; Kawakami, Katsuhiro; Shimada, Kohei

    2016-01-01

    Prostaglandin E2 (PGE2) is well known as a mediator of inflammatory symptoms such as fever, arthritis, and inflammatory pain. In the present study, we evaluated the analgesic effect of our selective PGE2 synthesis inhibitor, compound I, 2-methyl-2-[cis-4-([1-(6-methyl-3-phenylquinolin-2-yl)piperidin-4-yl]carbonyl amino)cyclohexyl] propanoic acid, in rat yeast-induced acute and adjuvant-induced chronic inflammatory pain models. Although this compound suppressed the synthesis of PGE2 selectively, no analgesic effect was shown in both inflammatory pain models. Prostacyclin (PGI2) also plays crucial roles in inflammatory pain, so we evaluated the involvement of PGI2 signaling in rat inflammatory pain models using prostacyclin receptor (IP) antagonist, RO3244019. RO3244019 showed no analgesic effect in inflammatory pain models, but concomitant administration of compound I and RO3244019 showed analgesic effects comparable to celecoxib, a specific cyclooxygenase- (COX-) 2 inhibitor. Furthermore, coadministration of PGE2 receptor 4 (EP4) antagonist, CJ-023423, and RO3244019 also showed an analgesic effect. These findings suggest that both PGE2 signaling, especially through the EP4 receptor, and PGI2 signaling play critical roles in inflammatory pain and concurrent inhibition of both signals is important for suppression of inflammatory hyperalgesia. PMID:27478311

  3. Simultaneous Inhibition of PGE2 and PGI2 Signals Is Necessary to Suppress Hyperalgesia in Rat Inflammatory Pain Models

    PubMed Central

    Kuwabara, Harumi

    2016-01-01

    Prostaglandin E2 (PGE2) is well known as a mediator of inflammatory symptoms such as fever, arthritis, and inflammatory pain. In the present study, we evaluated the analgesic effect of our selective PGE2 synthesis inhibitor, compound I, 2-methyl-2-[cis-4-([1-(6-methyl-3-phenylquinolin-2-yl)piperidin-4-yl]carbonyl amino)cyclohexyl] propanoic acid, in rat yeast-induced acute and adjuvant-induced chronic inflammatory pain models. Although this compound suppressed the synthesis of PGE2 selectively, no analgesic effect was shown in both inflammatory pain models. Prostacyclin (PGI2) also plays crucial roles in inflammatory pain, so we evaluated the involvement of PGI2 signaling in rat inflammatory pain models using prostacyclin receptor (IP) antagonist, RO3244019. RO3244019 showed no analgesic effect in inflammatory pain models, but concomitant administration of compound I and RO3244019 showed analgesic effects comparable to celecoxib, a specific cyclooxygenase- (COX-) 2 inhibitor. Furthermore, coadministration of PGE2 receptor 4 (EP4) antagonist, CJ-023423, and RO3244019 also showed an analgesic effect. These findings suggest that both PGE2 signaling, especially through the EP4 receptor, and PGI2 signaling play critical roles in inflammatory pain and concurrent inhibition of both signals is important for suppression of inflammatory hyperalgesia. PMID:27478311

  4. Behavioral characteristics of a mouse model of cancer pain.

    PubMed

    Lee, Bae Hwan; Seong, Jinsil; Kim, Un Jeng; Won, Ran; Kim, Jiyoung

    2005-04-30

    Pain is a major symptom in cancer patients, and most cancer patients with advanced or terminal cancers suffer from chronic pain related to treatment failure and/or tumor progression. In the present study, we examined the development of cancer pain in mice. Murine hepatocarcinoma cells, HCa-1, were inoculated unilaterally into the thigh or the dorsum of the foot of male C3H/HeJ mice. Four weeks after inoculation, behavioral signs were observed for mechanical allodynia, cold allodynia, and hyperalgesia using a von Frey filament, acetone, and radiant heat, respectively. Bone invasion by the tumor commenced from 7 days after inoculation of tumor cells and was evident from 14 days after inoculation. Cold allodynia but neither mechanical allodynia nor hyperalgesia was observed in mice that received an inoculation into the thigh. On the contrary, mechanical allodynia and cold allodynia, but not hyperalgesia, were developed in mice with an inoculation into the foot. Sometimes, mirror-image pain was developed in these animals. These results suggest that carcinoma cells injected into the foot of mice may develop severe chronic pain related to cancer. This animal model of pain would be useful to elucidate the mechanisms of cancer pain in humans. PMID:15861499

  5. Topical diclofenac epolamine patch 1.3% for treatment of acute pain caused by soft tissue injury

    PubMed Central

    McCarberg, B H; Argoff, C E

    2010-01-01

    Acute pain caused by musculoskeletal disorders is very common and has a significant negative impact on quality-of-life and societal costs. Many types of acute pain have been managed with traditional oral non-steroidal anti-inflammatory drugs (NSAIDs) and selective cyclooxygenase-2 inhibitors (coxibs). Data from prospective, randomised controlled clinical trials and postmarketing surveillance indicate that use of oral traditional NSAIDs and coxibs is associated with an elevated risk of developing gastrointestinal, renovascular and/or cardiovascular adverse events (AEs). Increasing awareness of the AEs associated with NSAID therapy, including coxibs, has led many physicians and patients to reconsider use of these drugs and look for alternative treatment options. Treatment with NSAIDs via the topical route of administration has been shown to provide clinically effective analgesia at the site of application while minimising systemic absorption. The anti-inflammatory and analgesic potency of the traditional oral NSAID diclofenac, along with its physicochemical properties, makes it well suited for topical delivery. Several topical formulations of diclofenac have been developed. A topical patch containing diclofenac epolamine 1.3% (DETP, FLECTOR® Patch), approved for use in Europe in 1993, has recently been approved for use in the United States and is indicated for the treatment of acute pain caused by minor strains, sprains and contusions. In this article, we review the available clinical trial data for this product in the treatment of pain caused by soft tissue injury. PMID:20666849

  6. Pain Medicine in Crisis—A Possible Model toward a Solution: Empowering Community Medicine to Treat Chronic Pain

    PubMed Central

    Minerbi, Amir; Vulfsons, Simon

    2013-01-01

    Pain medicine in Israel and in the world has reached a crisis. The lack of available pain medicine services is resulting in the unsatisfactory treatment for chronic pain sufferers. The main causes of this crisis are: 1) the high prevalence of chronic pain, reaching levels of 17% in the adult population;2) the lack of appropriate training of primary care physicians in the field of chronic pain management; and 3) the paucity of consultation services in the field of chronic pain. In this journal article, we propose a possible model for the solution of the problem, based upon levels of treatment according to the severity of the disease and upon training of primary and secondary care physicians in the treatment of pain. According to the model, the vast majority of treatment and management will take place in the community after appropriate training of primary care physicians. More complex cases will be referred to secondary care community-based pain clinics manned by physicians with further in-depth training. Only the most complex of patients, or those needing specialized treatment such as invasive analgesic therapy, will be referred to tertiary pain centers manned by specialists in pain medicine. Implementation of this model will necessitate training of primary care physicians and the establishment of secondary care facilities and can, in our opinion, pose a pragmatic solution for the hundreds of thousands of patients suffering from chronic pain. PMID:24228170

  7. Triheptanoin in acute mouse seizure models.

    PubMed

    Thomas, Nicola K; Willis, Sarah; Sweetman, Lawrence; Borges, Karin

    2012-05-01

    Triheptanoin, the triglyceride of heptanoate, is used to treat certain hereditary metabolic diseases in USA because of its anaplerotic potential. In two chronic mouse seizure models this clear tasteless oil was found to be reproducibly anticonvulsant. Here we investigated the effects of triheptanoin feeding in C3H and CD1 mice using standard acute seizure models. Feeding 30-40% triheptanoin (caloric intake) consistently elevated blood propionyl-carnitines, but inconsistent anticonvulsant effects were observed in the fluorothyl, pentylenetetrazole and 6Hz seizure models. A 2mA consistent increase in the maximal electroshock threshold was found after 3 weeks of 35% triheptanoin feeding (p=0.018). In summary, triheptanoin shows a unique anticonvulsant profile in seizure models, compared to other treatments that are in the clinic. Therefore, despite small and/or inconsistent effects of triheptanoin in acute seizure models, triheptanoin remains of interest as a potential add-on treatment for patients with medically refractory epilepsy. PMID:22260920

  8. The relationship between the fear-avoidance model of pain and personality traits in fibromyalgia patients.

    PubMed

    Martínez, María Pilar; Sánchez, Ana Isabel; Miró, Elena; Medina, Ana; Lami, María José

    2011-12-01

    This study examined the relationship between several cognitive-affective factors of the fear-avoidance model of pain, the big five model of personality, and functional impairment in fibromyalgia (FM). Seventy-four FM patients completed the NEO Five-Factor Inventory, the Pain Catastrophizing Scale, the Pain Anxiety Symptoms Scale-20, the Pain Vigilance and Awareness Questionnaire, and the Impairment and Functioning Inventory. Results indicated that the cognitive-affective factors of pain are differentially associated with personality traits. Neuroticism and conscientiousness were significant predictors of pain catastrophizing, and neuroticism, openness, and agreeableness were significant predictors of pain anxiety. Personality traits did not contribute significantly to vigilance to pain. The effect of neuroticism upon pain anxiety was mediated by pain catastrophizing, and neuroticism showed a trend to moderate the relationship between impairment and pain anxiety. Results support the fear-avoidance model of pain. Implications of the findings for the understanding and management of FM are discussed. PMID:21964824

  9. Phantom limb pain: an energy/trauma model.

    PubMed

    Leskowitz, Eric

    2014-01-01

    Phantom limb pain (PLP) is a form of chronic neuropathic pain that responds poorly to treatment interventions derived from the neuroanatomic understanding of pain and analgesia. Several new psychological and behavioral treatments that have proven more effective have been explained by invoking neural plasticity as their mechanism of action. Other novel treatments that are based on an "energy medicine" model also appear to be quite effective, especially when addressing the psychological trauma of the amputation itself, a factor that is generally overlooked in the standard surgical approach to limb amputation. A speculative trauma/energy model for the etiology of PLP is proposed. This model is developed in some detail, and its utility in explaining several anomalous aspects of PLP, as well as the clinical efficacy of energy therapies, is outlined. This model is proposed as a step in the development of simple and effective energy/trauma treatment protocols for this widespread and largely treatment-resistant disorder. PMID:25264368

  10. Effects of intracutaneous injections of sterile water in patients with acute low back pain: a randomized, controlled, clinical trial

    PubMed Central

    Cui, J.Z.; Geng, Z.S.; Zhang, Y.H.; Feng, J.Y.; Zhu, P.; Zhang, X.B.

    2016-01-01

    Intracutaneous sterile water injection (ISWI) is used for relief of low back pain during labor, acute attacks of urolithiasis, chronic neck and shoulder pain following whiplash injuries, and chronic myofascial pain syndrome. We conducted a randomized, double-blinded, placebo-controlled trial to evaluate the effect of ISWI for relief of acute low back pain (aLBP). A total of 68 patients (41 females and 27 males) between 18 and 55 years old experiencing aLBP with moderate to severe pain (scores ≥5 on an 11-point visual analogue scale [VAS]) were recruited and randomly assigned to receive either ISWIs (n=34) or intracutaneous isotonic saline injections (placebo treatment; n=34). The primary outcome was improvement in pain intensity using the VAS at 10, 45, and 90 min and 1 day after treatment. The secondary outcome was functional improvement, which was assessed using the Patient-Specific Functional Scale (PSFS) 1 day after treatment. The mean VAS score was significantly lower in the ISWI group than in the control group at 10, 45, and 90 min, and 1 day after injection (P<0.05, t-test). The mean increment in PSFS score of the ISWI group was 2.9±2.2 1 day after treatment, while that in the control group was 0.9±2.2. Our study showed that ISWI was effective for relieving pain and improving function in aLBP patients at short-term follow-up. ISWI might be an alternative treatment for aLBP patients, especially in areas where medications are not available, as well as in specific patients (e.g., those who are pregnant or have asthma), who are unable to receive medications or other forms of analgesia because of side effects. PMID:26840703

  11. Effects of intracutaneous injections of sterile water in patients with acute low back pain: a randomized, controlled, clinical trial.

    PubMed

    Cui, J Z; Geng, Z S; Zhang, Y H; Feng, J Y; Zhu, P; Zhang, X B

    2016-03-01

    Intracutaneous sterile water injection (ISWI) is used for relief of low back pain during labor, acute attacks of urolithiasis, chronic neck and shoulder pain following whiplash injuries, and chronic myofascial pain syndrome. We conducted a randomized, double-blinded, placebo-controlled trial to evaluate the effect of ISWI for relief of acute low back pain (aLBP). A total of 68 patients (41 females and 27 males) between 18 and 55 years old experiencing aLBP with moderate to severe pain (scores ≥5 on an 11-point visual analogue scale [VAS]) were recruited and randomly assigned to receive either ISWIs (n=34) or intracutaneous isotonic saline injections (placebo treatment; n=34). The primary outcome was improvement in pain intensity using the VAS at 10, 45, and 90 min and 1 day after treatment. The secondary outcome was functional improvement, which was assessed using the Patient-Specific Functional Scale (PSFS) 1 day after treatment. The mean VAS score was significantly lower in the ISWI group than in the control group at 10, 45, and 90 min, and 1 day after injection (P<0.05, t-test). The mean increment in PSFS score of the ISWI group was 2.9±2.2 1 day after treatment, while that in the control group was 0.9±2.2. Our study showed that ISWI was effective for relieving pain and improving function in aLBP patients at short-term follow-up. ISWI might be an alternative treatment for aLBP patients, especially in areas where medications are not available, as well as in specific patients (e.g., those who are pregnant or have asthma), who are unable to receive medications or other forms of analgesia because of side effects. PMID:26840703

  12. Acute intermittent porphyria leading to posterior reversible encephalopathy syndrome (PRES): a rare cause of abdominal pain and seizures.

    PubMed

    Dagens, Andrew; Gilhooley, Michael James

    2016-01-01

    Acute intermittent porphyria (AIP) is an inherited deficiency in the haem biosynthesis pathway. AIP is rare, affecting around 1 in 75 000 people. Acute attacks are characterised by abdominal pain associated with autonomic, neurological and psychiatric symptoms. AIP is rarely associated with posterior reversible encephalopathy syndrome (PRES). PRES is a clinicoradiological condition caused by the failure of the posterior circulation to autoregulate, resulting in cerebral oedema, headaches, nausea and seizures. This association is important because drugs used in the management of seizures may worsen an attack of AIP. This article describes a case of AIP and PRES in a young woman. PMID:27277587

  13. Clinical Comparative Study: Efficacy and Tolerability of Tolperisone and Thiocolchicoside in Acute Low Back Pain and Spinal Muscle Spasticity

    PubMed Central

    Rao, Rajeev; Panghate, Atul; Chandanwale, Ajay; Sardar, Indrajeet; Ghosh, Mriganka; Roy, Modan; Banerjee, Bireswar; Goswami, Ankur

    2012-01-01

    Study Design We performed a multicentric, randomized, comparative clinical trial. Eligible patients were randomly assigned to receive 150 mg of Tolperisone thrice daily or 8 mg of Thiocolchicoside twice daily for 7 days. Purpose To assess the efficacy and tolerability of Tolperisone in comparison with Thiocolchicoside in the treatment of acute low back pain with spasm of spinal muscles. Overview of Literature No head on clinical trial of Tolperisone with Thiocolchicoside is available and so this study is done. Methods The assessment of muscle spasm was made by measuring the finger-to-floor distance (FFD), articular excursion in degrees on performing Lasegue's maneuver and modified Schober's test. Assessment of pain on movement and spontaneous pain (pain at rest) of the lumbar spine was made with the help of visual analogue scale score. Results The improvement in articular excursion on Lasegue's maneuver was significantly greater on day 3 (p = 0.017) and day 7 (p = 0.0001) with Tolperisone as compared to Thiocolchicoside. The reduction in FFD score was greater on day 7 (p = 0.0001) with Tolperisone. However there was no significant difference in improvement in Schober's test score on day 3 (p = 0.664) and day 7 (p = 0.192). The improvement in pain score at rest and on movement was significantly greater with Tolperisone (p = 0.0001). Conclusions Tolperisone is an effective and well tolerated option for treatment of patients with skeletal muscle spasm associated with pain. PMID:22708015

  14. The Emerging Roles of Coronary Computed Tomographic Angiography: Acute Chest Pain Evaluation and Screening for Asymptomatic Individuals

    PubMed Central

    Chien, Ning; Wang, Tzung-Dau; Chang, Yeun-Chung; Lin, Po-Chih; Tseng, Yao-Hui; Lee, Yee-Fan; Ko, Wei-Chun; Lee, Bai-Chin; Lee, Wen-Jeng

    2016-01-01

    Coronary computed tomographic angiography (CCTA) has been widely available since 2004. After that, the diagnostic accuracy of CCTA has been extensively validated with invasive coronary angiography for detection of coronary arterial stenosis. In this paper, we reviewed the updated evidence of the role of CCTA in both scenarios including acute chest pain and screening in asymptomatic adults. Several large-scale studies have been conducted to evaluate the diagnostic value of CCTA in the context of acute chest pain patients. CCTA could play a role in delivering more efficient care. For risk stratification of asymptomatic patients using CCTA, latest studies have revealed incremental benefits. Future studies evaluating the totality of plaque characteristics may be useful for determining the role of noncalcified plaque for risk stratification in asymptomatic individuals. PMID:27122947

  15. The Monoiodoacetate Model of Osteoarthritis Pain in the Mouse.

    PubMed

    Pitcher, Thomas; Sousa-Valente, João; Malcangio, Marzia

    2016-01-01

    A major symptom of patients with osteoarthritis (OA) is pain that is triggered by peripheral as well as central changes within the pain pathways. The current treatments for OA pain such as NSAIDS or opiates are neither sufficiently effective nor devoid of detrimental side effects. Animal models of OA are being developed to improve our understanding of OA-related pain mechanisms and define novel pharmacological targets for therapy. Currently available models of OA in rodents include surgical and chemical interventions into one knee joint. The monoiodoacetate (MIA) model has become a standard for modelling joint disruption in OA in both rats and mice. The model, which is easier to perform in the rat, involves injection of MIA into a knee joint that induces rapid pain-like responses in the ipsilateral limb, the level of which can be controlled by injection of different doses. Intra-articular injection of MIA disrupts chondrocyte glycolysis by inhibiting glyceraldehyde-3-phosphatase dehydrogenase and results in chondrocyte death, neovascularization, subchondral bone necrosis and collapse, as well as inflammation. The morphological changes of the articular cartilage and bone disruption are reflective of some aspects of patient pathology. Along with joint damage, MIA injection induces referred mechanical sensitivity in the ipsilateral hind paw and weight bearing deficits that are measurable and quantifiable. These behavioral changes resemble some of the symptoms reported by the patient population, thereby validating the MIA injection in the knee as a useful and relevant pre-clinical model of OA pain. The aim of this article is to describe the methodology of intra-articular injections of MIA and the behavioral recordings of the associated development of hypersensitivity with a mind to highlight the necessary steps to give consistent and reliable recordings. PMID:27214709

  16. [A better understanding of clinical pain. Experimental data on 3 animal models of pain].

    PubMed

    Guilbaud, G

    1991-01-01

    For a better understanding of clinical pain, several groups involved in the study of basic pain mechanisms have proposed the use of various experimental models close to clinical situations. These models are based either on neurogenic or inflammatory process. Data obtained with three of these models will be developed in the paper: rats rendered arthritic by Freund's adjuvant injection into the tail, rats with an intraplantar injection of carrageenin in one hindpaw, rats with a moderate ligature of one common sciatic nerve. The various pharmacological approaches revealed dramatic changes of the analgesic effects of morphine and other opioid substances, and a spectacular modification of the endogenous opioid reactivity. A further enhancement of the initial hyperalgesia was observed with high doses (1-3 mg/kg i.v.) of naloxone (known as an antagonist of morphine), contrasting with the paradoxical analgesia induced with the low dose (peaking up for 3 micrograms/kg i.v.). Electrophysiological studies emphasized dramatic changes of neuronal responsiveness in structures involved in the transmission of the nociceptive messages, from the periphery to the cortex. In each of these models electrophysiological data provide new insights on the physiopathological mechanisms of the related clinical pain. PMID:1922633

  17. Burkitt Lymphoma Presented as Acute Lower Back Pain and Revealed by 18F-NaF PET/CT.

    PubMed

    Zheng, Wenlu; Chen, Yue; Huang, Zhanwen; Cai, Liang

    2016-05-01

    A 15-year-old man with acute lower back pain for 7 days underwent F-NaF PET/CT to determine the cause of his symptoms. The PET images revealed irregularly increased F activity in the L1 vertebral body without definite sclerotic changes on CT. However, the corresponding CT images revealed an adjacent paravertebral mass extending into the vertebral foramen without elevated activity on PET. A diagnosis of Burkitt lymphoma was made after pathological examination. PMID:26825214

  18. Initial evaluation of a canine stifle arthrotomy post-operative pain model.

    PubMed

    Tomas, A; Bledsoe, D; Wall, S; Davidson, G; Lascelles, B D X

    2015-06-01

    Most models of acute post-operative orthopedic pain involve the injection of a clinically irrelevant pro-inflammatory agent. The ideal model should, however, be clinically relevant and allow full functional recovery of enrolled animals after research is completed. This study explored the validity of a model employing arthrotomy and objectively measured limb use. Six purpose-bred Beagles underwent arthrotomies on each stifle with a washout period in between. Using a randomized crossover design, each dog received placebo and an extended-release buprenorphine (ER-Bup) preparation. Static and dynamic ground reaction forces (GRFs) were measured prior to and for 72 h following surgery using a pressure sensitive walkway (PSW). GRFs for each hind limb were compared using difference (delta), and symmetry indices (SI). The effects of surgery and of treatment were analyzed using repeated measures ANCOVA. The results indicated significantly decreased limb use compared to baseline for placebo, and significantly increased limb use in the ER-Bup group over placebo at all times for % bodyweight distribution (%BWdistrib), peak vertical force (PVF) and vertical impulse (VI). There was a significant treatment by time interaction for velocity (P = 0.03) and %BWdistrib (P = 0.01, 0.003). Overall, the data show that reduced limb use was present for at least 72 h following arthrotomy. In addition, the use of the ER-Bup analgesic decreased lameness, confirming the validity of this approach as a model of post-operative pain. Subjective assessments did not detect the pain-inducing effects of arthrotomy or pain-alleviating effects of treatment, and subjective measures of procedural pain in research dogs need to be developed. PMID:25910516

  19. Application of Low Frequency and Medium Frequency Currents in the Management of Acute and Chronic Pain-A Narrative Review

    PubMed Central

    Samuel, Stephen Rajan; Maiya, G Arun

    2015-01-01

    Trancutaneous electrical nerve stimulation (TENS) and interferential therapy (IFT) have been a regular line of treatment for various types of acute and chronic pain. This review aims to compile the latest literature in pain management using these modalities which use low-frequency and medium-frequency currents. The Cochrane Library, Scopus, PubMed, MEDLINE, and CINAHL were searched and studies were examined from their inception till October 2013. After title and abstract screening the relevant studies were included for this review. We found through this review that even though TENS and IFT are used in management of pain, there is limited amount of high quality research available in this area. Most of the studies lack methodological quality and have a low sample size. PMID:25709199

  20. A Model-Based Approach for Joint Analysis of Pain Intensity and Opioid Consumption in Postoperative Pain.

    PubMed

    Juul, Rasmus V; Knøsgaard, Katrine R; Olesen, Anne E; Pedersen, Katja V; Kreilgaard, Mads; Christrup, Lona L; Osther, Palle J; Drewes, Asbjørn M; Lund, Trine M

    2016-07-01

    Joint analysis of pain intensity and opioid consumption is encouraged in trials of postoperative pain. However, previous approaches have not appropriately addressed the complexity of their interrelation in time. In this study, we applied a non-linear mixed effects model to simultaneously study pain intensity and opioid consumption in a 4-h postoperative period for 44 patients undergoing percutaneous kidney stone surgery. Analysis was based on 748 Numerical Rating Scale (NRS) scores of pain intensity and 51 observed morphine and oxycodone dosing events. A joint model was developed to describe the recurrent pattern of four key phases determining the development of pain intensity and opioid consumption in time; (A) Distribution of pain intensity scores which followed a truncated Poisson distribution with time-dependent mean score ranging from 0.93 to 2.45; (B) Probability of transition to threshold pain levels (NRS ≥ 3) which was strongly dependent on previous pain levels ranging from 2.8-15.2% after NRS of 0-2; (C) Probability of requesting opioid when allowed (NRS ≥ 3) which was strongly correlated with the number of previous doses, ranging from 89.8% for requesting the first dose to 26.1% after three previous doses; (D) Reduction in pain scores after opioid dosing which was significantly related to the pain intensity at time of opioid request (P < 0.001). This study highlights the importance of analyzing pain intensity and opioid consumption in an integrated manner. Non-linear mixed effects modeling proved a valuable tool for analysis of interventions that affect pain intensity, probability of rescue dosing or the effect of opioids in the postoperative pain period. PMID:27116023

  1. Efficacy and Safety of Acupuncture for Acute Low Back Pain in Emergency Department: A Pilot Cohort Study

    PubMed Central

    Liu, Yen-Ting; Chiu, Chih-Wen; Chang, Chin-Fu; Lee, Tsung-Chieh; Chen, Chia-Yun; Chang, Shun-Chang; Lee, Chia-Ying; Lo, Lun-Chien

    2015-01-01

    Introduction. Low back pain (LBP) is one of the most common complaints in the emergency department (ED). There are several research articles providing evidence for acupuncture for treating chronic LBP but few about treating acute LBP. This study assessed the efficacy and safety of acupuncture for the treatment of acute LBP in the ED. Materials and methods. A clinical pilot cohort study was conducted. 60 participants, recruited in the ED, were divided into experimental and control groups with 1 dropout during the study. Life-threatening conditions or severe neurological defects were excluded. The experimental group (n = 45) received a series of fixed points of acupuncture. The control group (n = 14) received sham acupuncture by pasting seed-patches near acupoints. Back pain was measured using the visual analog scale (VAS) at three time points: baseline and immediately after and 3 days after intervention as the primary outcome. The secondary outcomes were heart rate variability (HRV) and adverse events. Results. The VAS demonstrated a significant decrease (P value <0.001) for the experimental group after 15 minutes of acupuncture. The variation in HRV showed no significant difference in either group. No adverse event was reported. Conclusion. Acupuncture might provide immediate effect in reducing the pain of acute LBP safely. PMID:26346626

  2. Cardiac MR enables diagnosis in 90% of patients with acute chest pain, elevated biomarkers and unobstructed coronary arteries

    PubMed Central

    Emrich, K; Abegunewardene, N; Oberholzer, K; Dueber, C; Muenzel, T; Kreitner, K-F

    2015-01-01

    Objective: To assess the diagnostic value of cardiac MRI (CMR) in patients with acute chest pain, elevated cardiac enzymes and a negative coronary angiogram. Methods: This study included a total of 125 patients treated in the chest pain unit during a 39-month period. Each included patient underwent MRI within a median of 3 days after cardiac catheterization. The MRI protocol comprised cine, oedema-sensitive and late gadolinium-enhancement imaging. The standard of reference was a consensus diagnosis based on clinical follow-up and the synopsis of all clinical, laboratory and imaging data. Results: MRI revealed a multitude of diagnoses, including ischaemic cardiomyopathy (CM), dilated CM, myocarditis, Takotsubo CM, hypertensive heart disease, hypertrophic CM, cardiac amyloidosis and non-compaction CM. MRI-based diagnoses were the same as the final reference diagnoses in 113/125 patients (90%), with the two diagnoses differing in only 12/125 patients. In two patients, no final diagnosis could be established. Conclusion: CMR performed early after the onset of symptoms revealed a broad spectrum of diseases. CMR delivered a correct final diagnosis in 90% of patients with acute chest pain, elevated cardiac enzymes and a negative coronary angiogram. Advances in knowledge: Diagnosing patients with acute coronary syndrome but unobstructed coronary arteries remains a challenge for cardiologists. CMR performed early after catheterization reveals a broad spectrum of diseases with only a simple and quick examination protocol, and there is a high concordance between MRI-based diagnoses and final reference diagnoses. PMID:25782462

  3. Epiploic Appendagitis: A Rare Cause of Acute Abdominal Pain in Children. Report of a Case and Review of the Pediatric Literature.

    PubMed

    Redmond, Paul; Sawaya, David E; Miller, Kristen H; Nowicki, Michael J

    2015-10-01

    A 9-year-old boy presented with acute onset of abdominal pain and vomiting. History, physical examination, and initial laboratory testing failed to provide a diagnosis. A computed tomography scan revealed the rare finding of epiploic appendagitis. We review the literature of this rare, but increasingly recognized, condition that mimics appendicitis and needs to be considered in the child with acute abdominal pain. PMID:26427946

  4. Rapidly progressing, fatal and acute promyelocytic leukaemia that initially manifested as a painful third molar: a case report

    PubMed Central

    2009-01-01

    Introduction Acute promyelocytic leukaemia, an uncommon and devastating subtype of leukaemia, is highly prevalent in Latin American populations. The disease may be detected by a dentist since oral signs are often the initial manifestation. However, despite several cases describing oral manifestations of acute promyelocytic leukaemia and genetic analysis, reports of acute promyelocytic leukaemia in Hispanic populations are scarce. The identification of third molar pain as an initial clinical manifestation is also uncommon. This is the first known case involving these particular features. Case presentation A 24-year-old Latin American man without relevant antecedents consulted a dentist for pain in his third molar. After two dental extractions, the patient experienced increased pain, poor healing, jaw enlargement and bleeding. A physical examination later revealed that the patient had pallor, jaw enlargement, ecchymoses and gingival haemorrhage. Laboratory findings showed pancytopaenia, delayed coagulation times, hypoalbuminaemia and elevated lactate dehydrogenase. Splenomegaly was detected on ultrasonography. Peripheral blood and bone marrow analyses revealed a hypercellular infiltrate of atypical promyelocytic cells. Cytogenetic analysis showing genetic translocation t(15;17) further confirmed acute promyelocytic leukaemia. Despite early chemotherapy, the patient died within one week due to intracranial bleeding secondary to disseminated intravascular coagulation. Conclusion The description of this unusual presentation of acute promyelocytic leukaemia, the diagnostic difficulties and the fatal outcome are particularly directed toward dental surgery practitioners to emphasise the importance of clinical assessment and preoperative evaluation as a minimal clinically-oriented routine. This case may also be of particular interest to haematologists, since the patient's cytogenetic analysis, clinical course and therapeutic response are well documented. PMID:19946580

  5. Stress and visceral pain: from animal models to clinical therapies

    PubMed Central

    Larauche, Muriel; Mulak, Agata; Taché, Yvette

    2011-01-01

    Epidemiological studies have implicated stress (psychosocial and physical) as a trigger of first onset or exacerbation of irritable bowel syndrome (IBS) symptoms of which visceral pain is an integrant landmark. A number of experimental acute or chronic exteroceptive or interoceptive stressors induce visceral hyperalgesia in rodents although recent evidence also points to stress-related visceral analgesia as established in the somatic pain field. Underlying mechanisms of stress-related visceral hypersensitivity may involve a combination of sensitization of primary afferents, central sensitization in response to input from the viscera and dysregulation of descending pathways that modulate spinal nociceptive transmission or analgesic response. Biochemical coding of stress involves the recruitment of corticotropin releasing factor (CRF) signaling pathways. Experimental studies established that activation of brain and peripheral CRF receptor subtype 1 plays a primary role in the development of stress-related delayed visceral hyperalgesia while subtype 2 activation induces analgesic response. In line with stress pathways playing a role in IBS, non-pharmacologic and pharmacologic treatment modalities aimed at reducing stress perception using a broad range of evidence-based mind-body interventions and centrally-targeted medications to reduce anxiety impact on brain patterns activated by visceral stimuli and dampen visceral pain. PMID:21575632

  6. Allergic Contact Dermatitis: A Model of Inflammatory Itch and Pain in Human and Mouse.

    PubMed

    LaMotte, Robert H

    2016-01-01

    This chapter is an overview of published observations from our laboratory on the psychophysics and neurobiology of the persistent itch and pain of allergic contact dermatitis (ACD). ACD is a clinically significant problem with many features characteristic of other pruritic disorders. Our approach was to produce ACD experimentally in humans and in the mouse. The goal was to use the mouse as an animal model for investigating the peripheral neural mechanisms of itch and pain of ACD in humans. Humans and mice were each sensitized by cutaneous topical application of squaric acid dibutyl ester, a hapten not encountered in the environment. Subsequent challenge at another cutaneous site produced local inflammation ("ACD") with humans reporting persistent itch (lasting up to a week) and mice exhibiting persistent itch- and pain-like behaviors directed toward the ACD site. Enhanced mechanically evoked itch and pain in surrounding skin in humans were reversibly blocked by numbing the ACD site with cold, suggesting dependence on ongoing activity from the site. In mice, in vivo recordings revealed spontaneous activity in a subset of pruriceptive, mechanoheat-sensitive nociceptors with unmyelinated axons innervating the ACD site. These and a larger subpopulation of acutely dissociated small-diameter neurons innervating the ACD site exhibited an upregulation of the receptor CXCR3 and excitatory responses to one of its ligands, the chemokine CXCL10 (IP-10) that contributes to the pathogenesis of ACD. Preliminary findings point to possible therapeutic targets that could be investigated in inflammatory itch disorders in humans. PMID:26900060

  7. Psychological Factors in Chronic Pelvic Pain in Women: Relevance and Application of the Fear-Avoidance Model of Pain

    PubMed Central

    Bishop, Mark D.

    2011-01-01

    Chronic pelvic pain in women is a debilitating, costly condition often treated by physical therapists. The etiology of this condition is multifactorial and poorly understood, given the complex interplay of muscles, bones, and soft tissue that comprise the pelvis. There are few guidelines directing treatment interventions for this condition. In the last decade, several investigators have highlighted the role of psychological variables in conditions such as vulvodynia and painful bladder syndrome. Pain-related fear is the focus of the fear-avoidance model (FAM) of pain, which theorizes that some people are more likely to develop and maintain pain after an injury because of their emotional and behavioral responses to pain. The FAM groups people into 2 classes on the basis of how they respond to pain: people who have low fear, confront pain, and recover from injury and people who catastrophize pain—a response that leads to avoidance/escape behaviors, disuse, and disability. Given the presence of pain-related cognitions in women with chronic pelvic pain, including hypervigilance, catastrophizing, and anxiety, research directed toward the application of the FAM to guide therapeutic interventions is warranted. Isolated segments of the FAM have been studied to theorize why traditional approaches (ie, medications and surgery) may not lead to successful outcomes. However, the explicit application of the FAM to guide physical therapy interventions for women with chronic pelvic pain is not routine. Integrating the FAM might direct physical therapists' clinical decision making on the basis of the pain-related cognitions and behaviors of patients. The aims of this article are to provide information about the FAM of musculoskeletal pain and to provide evidence for the relevance of the FAM to chronic pelvic pain in women. PMID:21835893

  8. Altered cognition-related brain activity and interactions with acute pain in migraine.

    PubMed

    Mathur, Vani A; Khan, Shariq A; Keaser, Michael L; Hubbard, Catherine S; Goyal, Madhav; Seminowicz, David A

    2015-01-01

    Little is known about the effect of migraine on neural cognitive networks. However, cognitive dysfunction is increasingly being recognized as a comorbidity of chronic pain. Pain appears to affect cognitive ability and the function of cognitive networks over time, and decrements in cognitive function can exacerbate affective and sensory components of pain. We investigated differences in cognitive processing and pain-cognition interactions between 14 migraine patients and 14 matched healthy controls using an fMRI block-design with two levels of task difficulty and concurrent heat (painful and not painful) stimuli. Across groups, cognitive networks were recruited in response to a difficult cognitive task, and a pain-task interaction was found in the right (contralateral to pain stimulus) posterior insula (pINS), such that activity was modulated by decreasing the thermal pain stimulus or by engaging the difficult cognitive task. Migraine patients had less task-related deactivation within the left dorsolateral prefrontal cortex (DLPFC) and left dorsal anterior midcingulate cortex (aMCC) compared to controls. These regions have been reported to have decreased cortical thickness and cognitive-related deactivation within other pain populations, and are also associated with pain regulation, suggesting that the current findings may reflect altered cognitive function and top-down regulation of pain. During pain conditions, patients had decreased task-related activity, but more widespread task-related reductions in pain-related activity, compared to controls, suggesting cognitive resources may be diverted from task-related to pain-reduction-related processes in migraine. Overall, these findings suggest that migraine is associated with altered cognitive-related neural activity, which may reflect altered pain regulatory processes as well as broader functional restructuring. PMID:25610798

  9. Impact of d-Dimers on the Differential Diagnosis of Acute Chest Pain: Current Aspects Besides the Widely Known.

    PubMed

    Hahne, Kathrin; Lebiedz, Pia; Breuckmann, Frank

    2014-01-01

    d-dimers are cleavage products of fibrin that occur during plasmin-mediated fibrinolysis of blood clots. In the emergency department, d-dimer measurement represents a valuable and cost-effective tool in the differential diagnosis of acute chest pain including the main life-threatening entities: acute coronary syndrome, pulmonary embolism, and acute aortic syndrome. Whereas the diagnostic and prognostic values of d-dimer testing in acute coronary syndrome is of less priority, increases of d-dimers are frequently found in venous thromboembolism and acute aortic syndromes, especially acute aortic dissection. As to the high negative predictive value of d-dimer in those disorders, patients with low to intermediate pretest probability may profit in terms of less necessity of further non-invasive or even invasive imaging, simultaneously reducing potential complications and healthcare-related costs. However, because of the low specificity of the different d-dimer tests in contrast to its frequent usage, adequate interpretation is required. Age-related adjustment of d-dimer levels may be used to increase its diagnostic power. PMID:25392700

  10. Impact of d-Dimers on the Differential Diagnosis of Acute Chest Pain: Current Aspects Besides the Widely Known

    PubMed Central

    Hahne, Kathrin; Lebiedz, Pia; Breuckmann, Frank

    2014-01-01

    d-dimers are cleavage products of fibrin that occur during plasmin-mediated fibrinolysis of blood clots. In the emergency department, d-dimer measurement represents a valuable and cost-effective tool in the differential diagnosis of acute chest pain including the main life-threatening entities: acute coronary syndrome, pulmonary embolism, and acute aortic syndrome. Whereas the diagnostic and prognostic values of d-dimer testing in acute coronary syndrome is of less priority, increases of d-dimers are frequently found in venous thromboembolism and acute aortic syndromes, especially acute aortic dissection. As to the high negative predictive value of d-dimer in those disorders, patients with low to intermediate pretest probability may profit in terms of less necessity of further non-invasive or even invasive imaging, simultaneously reducing potential complications and healthcare-related costs. However, because of the low specificity of the different d-dimer tests in contrast to its frequent usage, adequate interpretation is required. Age-related adjustment of d-dimer levels may be used to increase its diagnostic power. PMID:25392700

  11. Practical Guide to the Management of Acute and Chronic Pain in the Presence of Drug Tolerance for the Healthcare Practitioner

    PubMed Central

    Vadivelu, Nalini; Singh-Gill, Harman; Kodumudi, Gopal; Kaye, Aaron Joshua; Urman, Richard D.; Kaye, Alan David

    2014-01-01

    Background Drug tolerance has been on the rise in recent years worldwide, and consequently, pain management in our population has become challenging. Methods Discussed in this review are commonly abused drugs and considerations for treating acute and chronic pain states in patients with substance disorders. Results After marijuana, alcohol, and tobacco, the most widely abused substances are oxycodone (Oxycontin), diazepam (Valium), and methylphenidate (Ritalin). Urine testing can detect metabolites of drugs used by patients and is useful for assessing drug abuse, medication diversion, and drug interactions. The comprehensive treatment of pain in a patient with addictive disorder or tolerance must address 3 issues: the patient's addiction, any associated psychiatric conditions, and the patient's pain. Eliciting a detailed history of drug abuse—illicit drugs as well as prescription drugs—and ascertaining if the patient is currently enrolled in a methadone maintenance program for the treatment of drug addiction is vital. Conclusion Medical observation, supportive care, multidisciplinary pain management, and timely interventions as necessary are the keys to safe outcomes in these patients. PMID:25249810

  12. Effect of a Simple Information Booklet on Pain Persistence after an Acute Episode of Low Back Pain: A Non-Randomized Trial in a Primary Care Setting

    PubMed Central

    Coudeyre, Emmanuel; Baron, Gabriel; Coriat, Fernand; Brin, Sylvie; Revel, Michel; Poiraudeau, Serge

    2007-01-01

    Objective Mass-media campaigns have been known to modify the outcome of low back pain (LBP). We assessed the impact on outcome of standardized written information on LBP given to patients with acute LBP. Methods Design: A 3-month pragmatic, multicenter controlled trial with geographic stratification. Setting: Primary care practice in France. Participants: 2752 patients with acute LBP. Intervention: An advice book on LBP (the “back book”). Main outcome measures: The main outcome measure was persistence of LBP three months after baseline evaluation. Results 2337 (85%) patients were assessed at follow-up and 12.4% of participants reported persistent LBP. The absolute risk reduction of reporting persistent back pain in the intervention group was 3.6% lower than in the control group (10.5% vs. 14.1%; 95% confidence interval [−6.3% ; −1.0%]; p value adjusted for cluster effect = 0.01). Patients in the intervention group were more satisfied than those in the control group with the information they received about physical activities, when to consult their physician, and how to prevent a new episode of LBP. However, the number of patients who had taken sick leave was similar, as was the mean sick-leave duration, in both arms, and, among patients with persistent pain at follow-up, the intervention and control groups did not differ in disability or fear-avoidance beliefs. Conclusions The level of improvement of an information booklet is modest, but the cost and complexity of the intervention is minimal. Therefore, the implications and generalizability of this intervention are substantial. Trial Registration ClinicalTrials.gov NCT00343057 PMID:17684553

  13. Hypnosis in the treatment of acute pain in the emergency department setting.

    PubMed Central

    Deltito, J. A.

    1984-01-01

    Emergency ward physicians are presented daily with patients in pain. Provisions of safe, quick pain control remains one of their major duties. Hypnosis can be used as an effective adjunct or substitute for analgesic medications when these drugs prove to be ineffective or contraindicated. Four such illustrative cases of attempted pain control are presented. The psychological foundations of pain and its assessment are discussed. The emergency ward physician can obtain facility in hypnotic techniques with only modest training. Hypnosis may then become a valuable tool in helping him provide safe and effective pain management. PMID:6728748

  14. Serum, Saliva, and Urine Irisin with and Without Acute Appendicitis and Abdominal Pain

    PubMed Central

    Bakal, Unal; Aydin, Suleyman; Sarac, Mehmet; Kuloglu, Tuncay; Kalayci, Mehmet; Artas, Gokhan; Yardim, Meltem; Kazez, Ahmet

    2016-01-01

    A 112-amino-acid protein irisin (IRI) is widely expressed in many organs, but we currently do not know whether appendix tissue and blood cells express it. If appendix tissue and neutrophil cells express IRI, measuring its concentration in biological fluids might be helpful in the diagnosis of acute appendicitis (AA), since neutrophil cells are the currently gold-standard laboratory parameters for the diagnosis of AA. Therefore, the purpose of this study was to investigate the suitability of enzyme-linked immunosorbent assay-based measurements of the proposed myokine IRI for the discrimination of patients with AA from those with acute abdominal pain (AP) and healthy controls. Moreover, immunoreactivity to IRI was investigated in appendix tissues and blood cells. Samples were collected on admission (T1), 24 hours (T2), and 72 hours (T3) postoperatively from patients with suspected AA and from patients with AP corresponding to T1–T3, whereas control subject blood was once corresponding to T1. IRI was measured in serum, saliva, and urine by using enzyme-linked immunosorbent assay, whereas in appendix tissue and blood cells, IRI was detected by immunohistohcemistry. Appendix tissue and blood cells (except for erythrocytes) are new sources of IRI. Basal saliva, urine, and serum levels were higher in children with AA compared with postoperative levels (T2) that start to decline after surgery. This is in line with the finding that IRI levels are higher in children with AA when compared with those with AP or control subject levels, most likely due to a large infiltration of neutrophil cells in AA that release its IRI into body fluids. Measurement of IRI in children with AA parallels the increase or decrease in the neutrophil count. This new finding shows that the measurement of IRI and neutrophil count can together improve the diagnosis of AA, and it can distinguish it from AP. IRI can be a candidate marker for the diagnosis of AA and offers an additional parameter to

  15. Animal models of acute lung injury

    PubMed Central

    Matute-Bello, Gustavo; Frevert, Charles W.; Martin, Thomas R.

    2008-01-01

    Acute lung injury in humans is characterized histopathologically by neutrophilic alveolitis, injury of the alveolar epithelium and endothelium, hyaline membrane formation, and microvascular thrombi. Different animal models of experimental lung injury have been used to investigate mechanisms of lung injury. Most are based on reproducing in animals known risk factors for ARDS, such as sepsis, lipid embolism secondary to bone fracture, acid aspiration, ischemia-reperfusion of pulmonary or distal vascular beds, and other clinical risks. However, none of these models fully reproduces the features of human lung injury. The goal of this review is to summarize the strengths and weaknesses of existing models of lung injury. We review the specific features of human ARDS that should be modeled in experimental lung injury and then discuss specific characteristics of animal species that may affect the pulmonary host response to noxious stimuli. We emphasize those models of lung injury that are based on reproducing risk factors for human ARDS in animals and discuss the advantages and disadvantages of each model and the extent to which each model reproduces human ARDS. The present review will help guide investigators in the design and interpretation of animal studies of acute lung injury. PMID:18621912

  16. Human models of acute lung injury

    PubMed Central

    Proudfoot, Alastair G.; McAuley, Danny F.; Griffiths, Mark J. D.; Hind, Matthew

    2011-01-01

    Acute lung injury (ALI) is a syndrome that is characterised by acute inflammation and tissue injury that affects normal gas exchange in the lungs. Hallmarks of ALI include dysfunction of the alveolar-capillary membrane resulting in increased vascular permeability, an influx of inflammatory cells into the lung and a local pro-coagulant state. Patients with ALI present with severe hypoxaemia and radiological evidence of bilateral pulmonary oedema. The syndrome has a mortality rate of approximately 35% and usually requires invasive mechanical ventilation. ALI can follow direct pulmonary insults, such as pneumonia, or occur indirectly as a result of blood-borne insults, commonly severe bacterial sepsis. Although animal models of ALI have been developed, none of them fully recapitulate the human disease. The differences between the human syndrome and the phenotype observed in animal models might, in part, explain why interventions that are successful in models have failed to translate into novel therapies. Improved animal models and the development of human in vivo and ex vivo models are therefore required. In this article, we consider the clinical features of ALI, discuss the limitations of current animal models and highlight how emerging human models of ALI might help to answer outstanding questions about this syndrome. PMID:21357760

  17. Preoperative pain treatment in acute abdomen in Osogbo, Nigeria: a randomized double-blind placebo-controlled study

    PubMed Central

    2013-01-01

    Background Withholding analgesics in acute abdomen for fear of masking clinical features and impairing diagnosis and decision-making is still being practiced despite recent evidence to the contrary. This study assesses the effect of preoperative analgesia on clinical findings, clinical diagnosis, and decision-making in patients with non-trauma acute abdomen. Method This is a randomized, double-blind, placebo-controlled study using Tramal, a brand of tramadol, at the ED of LAUTECH Teaching Hospital Osogbo, Nigeria. Ninety-five patients between 18–60 years received Tramal (n = 46) or placebo (n = 49). The pain score, clinical findings, provisional diagnosis, and treatment plan were noted before and 15–20 min after administration of the analgesic or placebo. The final diagnosis arrived at after adequate investigation or operation was considered the gold standard. The pain scores, diagnosis, treatment plan, and decision between the two groups were compared. Statistical analysis was by SPSS 16. Results were considered statistically significant at p < 0.05. Results Demography and case distribution were similar in both groups. The improvement in pain was greater in the Tramal group (p = 0.001). The abdominal palpation findings were also better in the Tramal group (p = 0.02). There were more changes in the diagnosis after use of Tramal (p = 0.01). There were more changes in the decision in the Tramal group (p = 0.03). Most of the changes in diagnosis and decision in the Tramal group were for the better. Conclusion The preoperative use of Tramal in acute abdomen improved the experience of pain and did not adversely affect the accuracy of the diagnosis or decision-making. PMID:23343476

  18. A preliminary evaluation of the motivational model of pain self-management in persons with spinal cord injury related pain

    PubMed Central

    Molton, Ivan R.; Jensen, Mark P.; Nielson, Warren; Cardenas, Diana; Ehde, Dawn M.

    2008-01-01

    Chronic pain commonly accompanies long-term disabilities such as spinal cord injury (SCI). Research suggests that patient motivation to engage in adaptive pain coping strategies, such as exercise/stretching and task persistence, is an important factor in determining the impact that this pain will have on quality of life. One recently proposed model (the “Motivational Model of Pain Self-Management”) suggests that motivation to manage pain is influenced by two primary variables: beliefs about the importance of engaging in pain self-management (i.e., “perceived importance”) and beliefs about one's own ability to engage in these behaviors (i.e., “self-efficacy”). The purpose of this study was to provide a preliminary test of this model in a sample of 130 adults with SCI who completed a return by mail survey. Measures included a numerical rating scale of pain intensity and the revised version of the Multidimensional Pain Readiness to Change Questionnaire. Mediation analyses were performed using multiple regression. Results suggested that the effects of perceived importance and self-efficacy on exercise behavior were mediated by readiness to engage in exercise, consistent with the proposed model. However, the model could not be established for the outcome of task persistence. Perspective: This study tests a model describing motivation to engage in pain management behaviors (i.e., “readiness to change”) in adults with spinal cord injury. This model could potentially aid clinicians in their conceptualization of the factors that affect patient motivation to manage pain. PMID:18359668

  19. Multimodal analgesia with gabapentin and local anesthetics prevents acute and chronic pain after breast surgery for cancer.

    PubMed

    Fassoulaki, Argyro; Triga, Argyro; Melemeni, Aikaterini; Sarantopoulos, Constantine

    2005-11-01

    We evaluated the effect of multimodal analgesia on acute and chronic pain after breast surgery for cancer. Fifty patients scheduled for breast cancer surgery were blindly randomized to receive gabapentin, eutectic mixture of local anesthetics cream, and ropivacaine in the wound or three placebos. Pain (visual analog scale) and analgesics were recorded in the postanesthesia care unit (PACU) 3, 6, and 9 h and 8 days after surgery. Three and 6 mo later, patients were assessed for chronic pain. The treatment group consumed less paracetamol in the PACU (469 versus 991 mg; P < 0.002) and less Lonalgal (1.0 versus 4.4 tablets; P = 0.003) than the controls, exhibited lower visual analog scale scores at rest in the PACU (P = 0.001) and on postoperative Days 1, 3, and 5 (P = 0.040, P = 0.015, and P = 0.045, respectively), and after movement in the PACU (P = 0.001) and on postoperative Days 2, 4, and 8 (P = 0.028, P = 0.007, and P = 0.032, respectively). Three and 6 mo after surgery, 18 of 22 (82%) and 12 of 21 (57%) of the controls reported chronic pain versus 10 of 22 (45%) and 6 of 20 (30%) in the treatment group (P = 0.028 and P = 0.424, respectively); 5 of 22 and 4 of 21 of the controls required analgesics versus 0 of 22 and 0 of 20 of those treated (P = 0.048 and P = 0.107, respectively). Multimodal analgesia reduced acute and chronic pain after breast surgery for cancer. PMID:16244006

  20. Efficacy of Pregabalin in Acute Postoperative Pain Under Different Surgical Categories

    PubMed Central

    Lam, David M.H.; Choi, Siu-Wai; Wong, Stanley S.C.; Irwin, Michael G.; Cheung, Chi-Wai

    2015-01-01

    Abstract The efficacy of pregabalin in acute postsurgical pain has been demonstrated in numerous studies; however, the analgesic efficacy and adverse effects of using pregabalin in various surgical procedures remain uncertain. We aim to assess the postsurgical analgesic efficacy and adverse events after pregabalin administration under different surgical categories using a systematic review and meta-analysis of randomized controlled trials. A search of the literature was performed between August 2014 to April 2015, using PubMed, Ovid via EMBASE, Google Scholar, and ClinicalTrials.gov with no limitation on publication year or language. Studies considered for inclusion were randomized controlled trials, reporting on relevant outcomes (2-, 24-hour pain scores, or 24 hour morphine-equivalent consumption) with treatment with perioperative pregabalin. Seventy-four studies were included. Pregabalin reduced pain scores at 2 hours in all categories: cardiothoracic (Hedge's g and 95%CI, −0.442 [−0.752 to −0.132], P = 0.005), ENT (Hedge g and 95%CI, −0.684 [−1.051 to −0.316], P < 0.0001), gynecologic (Hedge g, 95%CI, −0.792 [−1.235 to −0.350], P < 0.0001), laparoscopic cholecystectomy (Hedge g, 95%CI, –0.600 [–0.989 to –0.210], P = 0.003), orthopedic (Hedge g, 95%CI, −0.507 [−0.812 to −0.202], P = 0.001), spine (Hedge g, 95%CI, −0.972 [−1.537 to −0.407], P = 0.001), and miscellaneous procedures (Hedge g, 95%CI, −1.976 [−2.654 to −1.297], P < 0.0001). Pregabalin reduced 24-hour morphine consumption in gynecologic (Hedge g, 95%CI, −1.085 [−1.582 to −0.441], P = 0.001), laparoscopic cholecystectomy (Hedge g, 95%CI, –0.886 [–1.652 to –0.120], P = 0.023), orthopedic (Hedge g, 95%CI, −0.720 [−1.118 to −0.323], P < 0.0001), spine (Hedge g, 95%CI, −1.016 [−1.732 to −0.300], P = 0.005), and miscellaneous procedures (Hedge g, 95%CI, −1.329 [−2.286 to −0.372], P = 0

  1. Efficacy and safety profile of combination of tramadol-diclofenac versus tramadol-paracetamol in patients with acute musculoskeletal conditions, postoperative pain, and acute flare of osteoarthritis and rheumatoid arthritis: a Phase III, 5-day open-label study

    PubMed Central

    Chandanwale, Ajay S; Sundar, Subramanian; Latchoumibady, Kaliaperumal; Biswas, Swati; Gabhane, Mukesh; Naik, Manoj; Patel, Kamlesh

    2014-01-01

    Objective We aimed to evaluate the safety and efficacy of a fixed-dose combination (FDC) of tramadol and diclofenac versus a standard approved FDC of tramadol and paracetamol, in patients with acute moderate to severe pain. Methods A total of 204 patients with moderate to severe pain due to acute musculoskeletal conditions (n=52), acute flare of osteoarthritis (n=52), acute flare of rheumatoid arthritis (n=50), or postoperative pain (n=50) were enrolled in the study at baseline. Each disease category was then randomized to receive either of two treatments for 5 days: group A received an FDC of immediate-release tramadol hydrochloride (50 mg) and sustained-release diclofenac sodium (75 mg) (one tablet, twice daily), and group B received an FDC of tramadol hydrochloride (37.5 mg) and paracetamol (325 mg) (two tablets every 4–6 hours, up to a maximum of eight tablets daily). The primary efficacy end points were reductions in pain intensity from baseline at day 3 and day 5 as assessed by a Visual Analog Scale (VAS) score. Results Group A showed a significant reduction in the VAS score for overall pain from baseline on day 3 (P=0.001) and day 5 (P<0.0001) as compared with group B. The combination of tramadol-diclofenac resulted in few mild to moderate adverse events (nausea, vomiting, epigastric pain, and gastritis), which required minimal management, without any treatment discontinuation. The number of adverse events in group A was nine (8.82%) compared with 22 (21.78%) in group B, after 5 days of treatment. Conclusion An FDC of tramadol-diclofenac showed a significantly greater reduction in pain intensity and was well tolerated compared with tramadol-paracetamol, resulting in better analgesia in patients suffering from moderate to severe pain due to acute musculoskeletal conditions, postoperative pain following orthopedic surgery, or acute flare of osteoarthritis and rheumatoid arthritis. PMID:25152629

  2. Meteorological factors and the time of onset of chest pain in acute myocardial infarction

    NASA Astrophysics Data System (ADS)

    Thompson, David R.; Pohl, Jurgen E.; Tse, Yiu-Yu S.; Hiorns, Robert W.

    1996-09-01

    Analysis of the time of onset of chest pain in 2254 patients with a myocardial infarction admitted to a coronary care unit in Leicester during a 10-year period shows an association with temperature and humidity. During both the most cold and humid times of the year, the relationship is a strong one. A generalized linear model with a log link was used to fit the data and the backward elimination selection procedure suggested a humid, cold day might help to trigger the occurrence of myocardial infarction. In addition, cold weather was found to have a stronger effect on the male population while those men aged between 50 and 70 years were more sensitive to the effect of high humidity.

  3. Chronic Pain in a Couples Context: A Review and Integration of Theoretical Models and Empirical Evidence

    PubMed Central

    Leonard, Michelle T.; Cano, Annmarie; Johansen, Ayna B.

    2007-01-01

    Researchers have become increasingly interested in the social context of chronic pain conditions. The purpose of this article is to provide an integrated review of the evidence linking marital functioning with chronic pain outcomes including pain severity, physical disability, pain behaviors, and psychological distress. We first present an overview of existing models that identify an association between marital functioning and pain variables. We then review the empirical evidence for a relationship between pain variables and several marital functioning variables including marital satisfaction, spousal support, spouse responses to pain, and marital interaction. On the basis of the evidence, we present a working model of marital and pain variables, identify gaps in the literature, and offer recommendations for research and clinical work. Perspective The authors provide a comprehensive review of the relationships between marital functioning and chronic pain variables to advance future research and help treatment providers understand marital processes in chronic pain. PMID:16750794

  4. The Effect of Gabapentin on Acute Postoperative Pain in Patients Undergoing Total Knee Arthroplasty: A Meta-Analysis.

    PubMed

    Zhai, Lifeng; Song, Zhoufeng; Liu, Kang

    2016-05-01

    The purpose of this systematic review and meta-analysis of randomized controlled trials (RCTs) and non-RCTs was to evaluate the efficacy and safety of gabapentin versus placebo for pain control after total knee arthroplasty (TKA).In December 2015, a systematic computer-based search was conducted in the Medline, Embase, PubMed, Cochrane Controlled Trials Register (CENTRAL), Web of Science, Google, and Chinese Wanfang databases. This systematic review and meta-analysis were performed according to the preferred reporting items for systematic reviews and meta-analyses (PRISMA) statement criteria. The primary endpoint was the visual analogue scale (VAS) score after TKA with rest or mobilization at 24 and 48 hours, representing the efficacy of pain control after TKA. Cumulative morphine consumption via patient controlled anesthesia (PCA) was also assessed to determine the morphine-spare effect. Complications such as dizziness, pruritus, vomiting, nausea, and sedation were also compiled to assess the safety of gabapentin. Stata 12.0 software was used for the meta-analysis. After testing for publication bias and heterogeneity across studies, the data were aggregated for random-effects modeling whenever necessary.Six studies involving 769 patients met the inclusion criteria. Our meta-analysis revealed that gabapentin resulted in superior pain relief compared to the control group in terms of VAS score with rest at 24 hours (mean difference [MD] = -3.47; 95% confidence interval [CI] -6.16 to -0.77; P = 0.012) and at 48 hours postoperatively (MD = -2.25; 95% CI -4.21 to -0.30; P = 0.024). There was no statistically significant difference between the groups with respect to the VAS score at 24 hours postoperatively (MD = 1.05; 95% CI -3.31 to 5.42; P = 0.636) or at 48 hours (MD = 1.71; 95% CI -0.74 to 4.15; P = 0.171). These results indicated that the perioperative administration of gabapentin decreases the cumulative morphine

  5. A Self-Administered Method of Acute Pressure Block of Sciatic Nerves for Short-Term Relief of Dental Pain: A Randomized Study

    PubMed Central

    Wang, Xiaolin; Zhao, Wanghong; Wang, Ye; Hu, Jiao; Chen, Qiu; Yu, Juncai; Wu, Bin; Huang, Rong; Gao, Jie; He, Jiman

    2014-01-01

    Objectives While stimulation of the peripheral nerves increases the pain threshold, chronic pressure stimulation of the sciatic nerve is associated with sciatica. We recently found that acute pressure block of the sciatic nerve inhibits pain. Therefore, we propose that, the pain pathology-causing pressure is chronic, not acute. Here, we report a novel self-administered method: acute pressure block of the sciatic nerves is applied by the patients themselves for short-term relief of pain from dental diseases. Design This was a randomized, single-blind study. Setting Hospital patients. Patients Patients aged 16–60 years with acute pulpitis, acute apical periodontitis, or pericoronitis of the third molar of the mandible experiencing pain ≥3 on the 11-point numerical pain rating scale. Interventions Three-minute pressure to sciatic nerves was applied by using the hands (hand pressure method) or by having the patients squat to force the thigh and shin as tightly as possible on the sandwiched sciatic nerve bundles (self-administered method). Outcomes The primary efficacy variable was the mean difference in pain scores from the baseline. Results One hundred seventy-two dental patients were randomized. The self-administered method produced significant relief from pain associated with dental diseases (P ≤ 0.001). The analgesic effect of the self-administered method was similar to that of the hand pressure method. Conclusions The self-administered method is easy to learn and can be applied at any time for pain relief. We believe that patients will benefit from this method. PMID:24400593

  6. Acute-Onset of Multiple Painful Nodules over Forearms and Back.

    PubMed

    Kumar S, Praveen; Kamath, Sulatha M; Prasad, A L Shyam; Mysorekar, Vijaya V; Sumathy, T K

    2013-10-01

    Angiolipomas are benign encapsulated, well circumscribed tumours, which show excessive degree of vascular proliferation. Clinically, lesions present as sudden onset of multiple painful nodules. Pain usually does not respond to analgesics. We herein, report a case of a young male, presenting with multiple painful nodules over the forearm and back, which on histopathological examination revealed, encapsulated benign tumour, comprising of proliferated small-caliber vascular channels with microthrombi and variable amounts of mature adipose tissue. Pain subsided on treatment with intralesional steroids and the nodules were excised through a narrow-hole extrusion technique. PMID:24298516

  7. Effects of reflexotherapy on acute postoperative pain and anxiety among patients with digestive cancer.

    PubMed

    Tsay, Shiow-Luan; Chen, Hsiao-Ling; Chen, Su-Chiu; Lin, Hung-Ru; Lin, Kuan-Chia

    2008-01-01

    Even after receiving analgesia, patients with gastric and liver cancer still report moderate levels of postoperative pain. The purpose of the study was to investigate the efficacy of foot reflexotherapy as adjuvant therapy in relieving pain and anxiety in postoperative patients with gastric cancer and hepatocellular cancer. The study design was a randomized controlled trial. Data were collected from 4 surgical wards of a medical center in 2005 in Taipei, Taiwan. Sixty-one patients who had received surgery for gastric cancer or hepatocellular carcinoma were randomly allocated to an intervention (n = 30) or control (n = 31) group. Patients in the intervention group received the usual pain management plus 20 minutes of foot reflexotherapy during postoperative days 2, 3, and 4. Patients in the control group received usual pain management. Outcome measures included the short-form McGill Pain Questionnaire, visual analog scale for pain, summary of the pain medications consumed, and the Hospital Anxiety and Depression Scale. Results demonstrated that studied patients reported moderately high levels of pain and anxiety postoperatively while patients were managed with patient-controlled analgesia. Using generalized estimation equations and controlling for confounding variables, less pain (P < .05) and anxiety (P < .05) over time were reported by the intervention group compared with the control group. In addition, patients in the intervention group received significantly less opioid analgesics than the control group (P < .05). Findings from this study provide nurses with an additional treatment to offer postoperative digestive cancer patients. PMID:18490886

  8. The antinociceptive effects of the tetracyclic triterpene euphol in inflammatory and neuropathic pain models: The potential role of PKCε.

    PubMed

    Dutra, R C; Bicca, M A; Segat, G C; Silva, K A B S; Motta, E M; Pianowski, L F; Costa, R; Calixto, J B

    2015-09-10

    Evidences suggest protein kinase C epsilon (PKCε) activation is involved in both inflammatory and neuropathic pains. We have previously shown that tetracyclic triterpene euphol produces antinociception in different models of persistent pain, an action associated with its anti-inflammatory properties. Among these properties are the cannabinoid system activation and different PKC isozymes modulation. Herein, we sought to explore the potential role of PKCε modulation on euphol antinociceptive effect, in inflammatory and neuropathic pain models, in rodents. Also, we investigated further mechanisms associated with euphol effects. Oral treatment with euphol (30 mg/kg) prevented the putative effect of PGE2-induced acute and persistent mechanical hypersensitivity in mice and rats, respectively. In the PGE2-induced acute mechanical hypersensitivity euphol promoted an inhibitory effect similar to a PKCε inhibitor peptide. Likewise, in rats it prevented the mechanical hypersensitivity induced by a PKCε activator. Conversely, euphol effectiveness was not observed in a cAMP/PKA-induced mechanical hypersensitivity in mice. Single (1h prior) or repeated (twice daily during 3 or 13 days) treatments with euphol ameliorated painful peripheral neuropathy induced by paclitaxel and also the mechanical hypersensitivity induced by B16F10 melanoma cells injection, in mice. Additionally, in both inflammatory and neuropathic pain models, euphol consistently prevented PKCε up-regulation, as well as, inhibited the up-regulation of PKCε-activated intracellular pathways; namely nuclear factor-κB (NF-κB), cyclic AMP response element binding protein (CREB) and cyclo-oxygenase-2 (COX-2). The present results suggest the antinociceptive effect on persistent pain caused by euphol is likely dependent on the inhibition of pro-inflammatory mediators modulated by PKCε. PMID:26143011

  9. The effect of aging on the density of the sensory nerve fiber innervation of bone and acute skeletal pain

    PubMed Central

    Jimenez-Andrade, Juan M.; Mantyh, William G.; Bloom, Aaron P.; Freeman, Katie T.; Ghilardi, Joseph R.; Kuskowski, Michael A.; Mantyh, Patrick W.

    2010-01-01

    As humans age there is a decline in most sensory systems including vision, hearing, taste, smell, and tactile acuity. In contrast, the frequency and severity of musculoskeletal pain generally increases with age. To determine whether the density of sensory nerve fibers that transduce skeletal pain changes with age, calcitonin gene related peptide (CGRP) and neurofilament 200 kDa (NF200) sensory nerve fibers that innervate the femur were examined in the femurs of young (4 month old), middle-aged (13 month) and old (36 month) male F344/BNF1 rats. Whereas the bone quality showed a significant age-related decline, the density of CGRP+ and NF200+ nerve fibers that innervate the bone remained remarkably unchanged as well as the severity of acute skeletal fracture pain. Thus, while bone mass, quality and strength undergo a significant decline with age, the density of sensory nerve fibers that transduce noxious stimuli remain largely intact. These data may in part explain why musculoskeletal pain increases with age. PMID:20947214

  10. Likert pain score modeling: a Markov integer model and an autoregressive continuous model.

    PubMed

    Plan, E L; Elshoff, J-P; Stockis, A; Sargentini-Maier, M L; Karlsson, M O

    2012-05-01

    Pain intensity is principally assessed using rating scales such as the 11-point Likert scale. In general, frequent pain assessments are serially correlated and underdispersed. The aim of this investigation was to develop population models adapted to fit the 11-point pain scale. Daily Likert scores were recorded over 18 weeks by 231 patients with neuropathic pain from a clinical trial placebo group. An integer model consisting of a truncated generalized Poisson (GP) distribution with Markovian transition probability inflation was implemented in NONMEM 7.1.0. It was compared to a logit-transformed autoregressive continuous model with correlated residual errors. In both models, the score baseline was estimated to be 6.2 and the placebo effect to be 19%. Developed models similarly retrieved consistent underlying features of the data and therefore correspond to platform models for drug effect detection. The integer model was complex but flexible, whereas the continuous model can more easily be developed, although requires longer runtimes. PMID:22433987

  11. Toward an understanding of the rationale for the use of dietary supplementation for chronic pain management: the serotonin model.

    PubMed

    Haze, J J

    1991-10-01

    The use of dietary metabolic precursors to neurotransmitter in the management of chronic pain patients has received critical attention for several years. As pain evolves from acute to chronic, different neuronal pathways are used and diverse areas of the brain become involved in pain perception and modulation. The serotonergic system serves as a useful model for understanding the effect of metabolic precursors. Oral L-tryptophan administration decreases the perception of pain, appearing to act synergistically with the enkephalins and endorphins. Drugs that either increase the serotonin level or block reuptake are associated with decreased pain perception, increased pain threshold, and improved sleep. From a therapeutic standpoint, dietary modification would appear to be attractive, due to its low economic basis, decreased risk of addiction and dependence, as well as simplicity. However, potential risk from toxicity is only recently being recognized, along with difficulty in reliability of analgesic effect from one patient to another. Currently, L-tryptophan is unavailable for therapeutic use in the United States and is not recommended implicitly or explicitly by the author because of its potential health risk. PMID:1687935

  12. The Manchester Acute Coronary Syndromes (MACS) decision rule for suspected cardiac chest pain: derivation and external validation

    PubMed Central

    Body, Richard; Carley, Simon; McDowell, Garry; Pemberton, Philip; Burrows, Gillian; Cook, Gary; Lewis, Philip S; Smith, Alexander; Mackway-Jones, Kevin

    2014-01-01

    Objective We aimed to derive and validate a clinical decision rule (CDR) for suspected cardiac chest pain in the emergency department (ED). Incorporating information available at the time of first presentation, this CDR would effectively risk-stratify patients and immediately identify: (A) patients for whom hospitalisation may be safely avoided; and (B) high-risk patients, facilitating judicious use of resources. Methods In two sequential prospective observational cohort studies at heterogeneous centres, we included ED patients with suspected cardiac chest pain. We recorded clinical features and drew blood on arrival. The primary outcome was major adverse cardiac events (MACE) (death, prevalent or incident acute myocardial infarction, coronary revascularisation or new coronary stenosis >50%) within 30 days. The CDR was derived by logistic regression, considering reliable (κ>0.6) univariate predictors (p<0.05) for inclusion. Results In the derivation study (n=698) we derived a CDR including eight variables (high sensitivity troponin T; heart-type fatty acid binding protein; ECG ischaemia; diaphoresis observed; vomiting; pain radiation to right arm/shoulder; worsening angina; hypotension), which had a C-statistic of 0.95 (95% CI 0.93 to 0.97) implying near perfect diagnostic performance. On external validation (n=463) the CDR identified 27.0% of patients as ‘very low risk’ and potentially suitable for discharge from the ED. 0.0% of these patients had prevalent acute myocardial infarction and 1.6% developed MACE (n=2; both coronary stenoses without revascularisation). 9.9% of patients were classified as ‘high-risk’, 95.7% of whom developed MACE. Conclusions The Manchester Acute Coronary Syndromes (MACS) rule has the potential to safely reduce unnecessary hospital admissions and facilitate judicious use of high dependency resources. PMID:24780911

  13. Central noradrenergic mechanisms and the acute stress response during painful stimulation.

    PubMed

    Chapman, C Richard; Bradshaw, David H; Donaldson, Gary W; Jacobson, Robert C; Nakamura, Yoshio

    2014-12-01

    Events that threaten tissue integrity including noxious stimulation activate central noradrenergic circuits, particularly locus coeruleus and its projections. Recent advances in theory hold that an adaptive, defensive shift in brain activity takes place in response to threat. In principle, this shift may accentuate the autonomic and central biomarkers of the perception of painful events and the experience of pain itself. We have examined the effects of an alpha-2 agonist on pupil dilation responses, skin conductance responses, near field somatosensory evoked potentials and pain reports in normal volunteers undergoing repeated trials of painful fingertip stimulation delivered at low, medium and high intensities. In a double-blinded study, 114 healthy male and female volunteers underwent repeated noxious stimulation under baseline, placebo and active drug conditions where the active drug was the alpha-2 agonist tizanidine 4 mg. In contrast to baseline and placebo conditions, tizanidine 4 mg significantly reduced the magnitudes of the mean pupil dilation response, the mean skin conductance response, the mean near field somatosensory evoked potential peak-to-peak amplitude and the mean pain intensity rating. Stimulus intensity significantly altered all three biomarkers and the pain report in a graded fashion. There were no sex differences. These findings support the hypotheses that painful events activate central noradrenergic circuits, and that these circuits play a role in the autonomic and central arousal associated with pain. PMID:25122041

  14. Impact of healing touch with healing harp on inpatient acute care pain: a retrospective analysis.

    PubMed

    Lincoln, Valerie; Nowak, Emily Witrak; Schommer, Barb; Briggs, Tami; Fehrer, Amy; Wax, Gary

    2014-01-01

    This study examined the concomitant use of 2 complementary and alternative medicine modalities, Healing Harp and Healing Touch, to reduce pain, anxiety, and nausea in the postoperative patient population. The results demonstrate the effectiveness of using concomitant Healing Touch and Healing Harp to significantly reduce moderate to severe pain and anxiety in this patient population. Further research is warranted. PMID:24722611

  15. Characterization of the acute and persistent pain state present in K/BxN serum transfer arthritis

    PubMed Central

    Christianson, Christina A.; Corr, Maripat; Firestein, Gary S.; Mobargha, Anahita; Yaksh, Tony L.; Svensson, Camilla I.

    2010-01-01

    Rheumatoid arthritis (RA) is a chronic autoimmune arthritis that affects approximately 1% of the population. Synovial inflammation cannot fully explain the level of pain reported by patients and facilitation of pain processing at the spinal level has been implicated. We characterized the K/BxN serum transfer arthritis model as a model of joint inflammation-induced pain and examine pharmacologic responsiveness and spinal glia activation. Mechanical allodynia developed congruently with joint swelling. Surprisingly, allodynia persisted after resolution of inflammation. At the peak of joint inflammation, (days 4–10) hypersensitivity was attenuated with i.p. etanercept, gabapentin, and ketorolac. Following resolution of synovial inflammation (day 19–28), only gabapentin relieved allodynia. The superficial dorsal horn of arthritic mice displayed increased staining of microglia at early and late time points, but astrocyte staining increased only during the inflammatory phase. ATF3, a marker of nerve injury, was significantly increased in the lumbar dorsal root ganglia during the late phase (day 28). Hence, serum transfer in the K/BxN serum transfer arthritis model produces a persistent pain state, where the allodynia during the inflammatory state is attenuated by TNF and prostaglandin inhibitors, and the pharmacology and histochemistry data suggest a transition from an inflammatory state to a state that resembles a neuropathic condition over time. Therefore, the K/BxN serum transfer model represents a multifaceted model for studies exploring pain mechanisms in conditions of joint inflammation and may serve as a platform for exploring novel treatment strategies for pain in human arthritic conditions. K/BxN serum transfer arthritis produces persistent mechanical hypersensitivity despite resolution of clinical signs with evidence of transition from an inflammatory to neuropathic pain state. PMID:20739123

  16. Influences of the Aging Process on Acute Perioperative Pain Management in Elderly and Cognitively Impaired Patients

    PubMed Central

    Halaszynski, Thomas

    2013-01-01

    Background The aging process results in physiological deterioration and compromise along with a reduction in the reserve capacity of the human body. Because of the reduced reserves of mammalian organ systems, perioperative stressors may result in compromise of physiologic function or clinical evidence of organ insult secondary to surgery and anesthesia. The purpose of this review is to present evidence-based indications and best practice techniques for perioperative pain management in elderly surgical patients. Results In addition to pain, cognitive dysfunction in elderly surgical patients is a common occurrence that can often be attenuated with appropriate drug therapy. Modalities for pain management must be synthesized with intraoperative anesthesia and the type of surgical intervention and not simply considered a separate entity. Conclusions Pain in elderly surgical patients continues to challenge physicians and healthcare providers. Current studies show improved surgical outcomes for geriatric patients who receive multimodal therapy for pain control. PMID:23789010

  17. Reduced acute nociception and chronic pain in Shank2−/− mice

    PubMed Central

    Ko, Hyoung-Gon; Oh, Seog-Bae; Zhuo, Min

    2016-01-01

    Autism spectrum disorder is a debilitating mental illness and social issue. Autism spectrum disorder patients suffer from social isolation, cognitive deficits, compulsive behavior, and sensory deficits, including hyposensitivity to pain. However, recent studies argued that autism spectrum disorder patients show physiological pain response and, in some cases, even extremely intense pain response to harmless stimulation. Recently, Shank gene family was reported as one of the genetic risk factors of autism spectrum disorder. Thus, in this study, we used Shank2−/− (Shank2 knock-out, KO) mice to investigate the controversial pain sensitivity issue and found that Shank2 KO mice showed reduced tactile perception and analgesia to chronic pain. PMID:27145803

  18. Transplantation of adipose derived mesenchymal stem cells for acute thoracolumbar disc disease with no deep pain perception in dogs

    PubMed Central

    Kim, Yongsun; Lee, Seung Hoon; Kim, Wan Hee

    2016-01-01

    Thirty-four dogs with no deep pain perception due to acute thoracolumbar intervertebral disc disease underwent decompression surgery within 1 week of diagnosis. All dogs underwent hemilaminectomy. Adipose derived mesenchymal stem cells (AD-MSCs) were transplanted into the injured spinal cord parenchyma for the AD-MSCs transplant dogs. Long-term outcome was evaluated at the end of the follow-up period (> 6 months). AD-MSCs combination treatment showed better recovery outcomes compared to decompression surgery alone. These results indicate that this stem cell therapy is a potential therapeutic strategy to overcome the limitations of treatment for spinal cord injury in clinical medicine. PMID:27051350

  19. Influence of the application of inelastic taping on shoulder subluxation and pain changes in acute stroke patients

    PubMed Central

    Heo,, Min-Yeong; Kim,, Cheol-Yong; Nam, Chan-Woo

    2015-01-01

    [Purpose] The purpose of this study was to investigate the impact on the shoulder joints of performing inelastic taping and bed physical therapy for acute stroke. [Subjects and Methods] The intervention was conducted for eight weeks with an experimental group of 18 stroke patients who received bed physical therapy and inelastic taping and a control group of 18 stroke patients who received only bed physical therapy. [Results] After the intervention, the subluxation degree of the experimental group, which received bed physical therapy and inelastic taping, was found to be significantly different from that of the control group, which received only bed physical therapy. [Conclusion] In conclusion, the application of inelastic taping for acute stroke patients was confirmed to be effective at reducing shoulder subluxation and pain, and was confirmed to be a good physical therapy intervention, based on its efficacy. PMID:26696705

  20. A Biopsychosocial-Spiritual Model of Chronic Pain in Adults with Sickle Cell Disease

    PubMed Central

    Taylor, Lou Ella V.; Stotts, Nancy A.; Humphreys, Janice; Treadwell, Marsha J.; Miaskowski, Christine

    2011-01-01

    Chronic pain in adults with sickle cell disease (SCD) is a complex multidimensional experience that includes biological, psychological, sociological, and spiritual factors. To date, three models of pain associated with SCD (i.e., biomedical model; biopsychosocial model for SCD pain; Health Belief Model) are published. The biopsychosocial (BPS) multidimensional approach to chronic pain developed by Turk and Gatchel is a widely used model of chronic pain. However, this model has not been applied to chronic pain associated with SCD. In addition, a spiritual/religious dimension is not included in this model. Because spirituality/religion is central to persons affected by SCD, this dimension needs to be added to any model of chronic pain in adults with SCD. In fact, data from one study suggest that spirituality/religiosity is associated with decreased pain intensity in adults with chronic pain from SCD. A BPS-Spiritual model is proposed for adults with chronic pain from SCD since it embraces the whole person. This model includes the biological, psychological, sociological, and spiritual factors relevant to adults with SCD based on past and current research. The purpose of this paper is to describe an adaptation of Turk and Gatchel’s model of chronic pain for adults with SCD and to summarize research findings that support each component of the revised model (i.e., biological, psychological, sociological, spiritual). The paper concludes with a discussion of implications for the use of this model in research. PMID:24315252

  1. “When will I recover?” A national survey on patients’ and physicians’ expectations concerning the recovery time for acute back pain

    PubMed Central

    Allaert, F. A.; Concas, V.; Laroche, F.

    2009-01-01

    The objective of this study was to compare patients’ and physicians’ expectations concerning the recovery time for acute back pain, and their determinants. A French national observational survey was performed between October and December 2005. Each physician was asked to include the first three patients aged between 20 and 70 years presenting with acute back pain (VAS > 40 mm) of less than 1 month’s duration. A total number of 1982 patients, with a mean age of 48.4 ± 11.8 years (52.2% men), were enrolled by 834 physicians. Patients and their physicians expected recovery to take the same amount of time in 60.3% of cases (Kappa = 0.43). In 17.4% of cases, patients predicted a shorter recovery time than physicians, and in 22.4% of cases, patients predicted a longer recovery time. Both patients and physicians expected recovery time to be longer in women, and in older, unmarried, obese, and non working patients. Expected recovery time was also longer in patients with no sports activities, low back pain (as opposed to pain at other sites), a high level of disability, a history of back pain, and no triggering factor. The intensity of pain and the number of days of sick leave taken did not affect the patient’s prediction of recovery time, but did affect the physicians’ expectations. Physicians considered professional status, analgesic intake and previous sick leave to be independent predictive factors, whereas patients did not. Expected recovery time, assessed shortly after the onset of acute back pain is influenced by most of the clinical and demographic factors usually considered risk factors for chronic low back pain. Patients’ predictions of recovery time should be assessed in acute back pain, to identify risks for expected chronicity. PMID:19132411

  2. Dental (Odontogenic) Pain

    PubMed Central

    Renton, Tara

    2011-01-01

    This article provides a simple overview of acute trigeminal pain for the non dentist. This article does not cover oral mucosal diseases (vesiculobullous disorders) that may cause acute pain. Dental pain is the most common in this group and it can present in several different ways. Of particular interest for is that dental pain can mimic both trigeminal neuralgia and other chronic trigeminal pain disorders. It is crucial to exclude these disorders whilst managing patients with chronic trigeminal pain. PMID:26527224

  3. Toward the development of a motivational model of pain self-management.

    PubMed

    Jensen, Mark P; Nielson, Warren R; Kerns, Robert D

    2003-11-01

    Adaptive management of chronic pain depends to a large degree on how patients choose to cope with pain and its impact. Consequently, patient motivation is an important factor in determining how well patients learn to manage pain. However, the role of patient motivation in altering coping behavior and maintaining those changes is seldom discussed, and theoretically based research on motivation for pain treatment is lacking. This article reviews theories that have a direct application to understanding motivational issues in pain coping and presents a preliminary motivational model of pain self-management. The implications of this model for enhancing engagement in and adherence to chronic pain treatment programs are then discussed. The article ends with a call for research to better understand motivation as it applies to chronic pain self-management. In particular, there is a need to determine whether (and which) motivation enhancement interventions increase active participation in self-management treatment programs for chronic pain. PMID:14636816

  4. Comparison of Burrowing and Stimuli-Evoked Pain Behaviors as End-Points in Rat Models of Inflammatory Pain and Peripheral Neuropathic Pain

    PubMed Central

    Muralidharan, Arjun; Kuo, Andy; Jacob, Meera; Lourdesamy, Jacintha S.; Carvalho, Lara Melo Soares Pinho De; Nicholson, Janet R.; Corradini, Laura; Smith, Maree T.

    2016-01-01

    Establishment and validation of ethologically-relevant, non-evoked behavioral end-points as surrogate measures of spontaneous pain in rodent pain models has been proposed as a means to improve preclinical to clinical research translation in the pain field. Here, we compared the utility of burrowing behavior with hypersensitivity to applied mechanical stimuli for pain assessment in rat models of chronic inflammatory and peripheral neuropathic pain. Briefly, groups of male Sprague-Dawley rats were habituated to the burrowing environment and trained over a 5-day period. Rats that burrowed ≤ 450 g of gravel on any 2 days of the individual training phase were excluded from the study. The remaining rats received either a unilateral intraplantar injection of Freund's complete adjuvant (FCA) or saline, or underwent unilateral chronic constriction injury (CCI) of the sciatic nerve- or sham-surgery. Baseline burrowing behavior and evoked pain behaviors were assessed prior to model induction, and twice-weekly until study completion on day 14. For FCA- and CCI-rats, but not the corresponding groups of sham-rats, evoked mechanical hypersensitivity developed in a temporal manner in the ipsilateral hindpaws. Although burrowing behavior also decreased in a temporal manner for both FCA-and CCI- rats, there was considerable inter-animal variability. By contrast, mechanical hyperalgesia and mechanical allodynia in the ipsilateral hindpaws of FCA- and CCI-rats respectively, exhibited minimal inter-animal variability. Our data collectively show that burrowing behavior is altered in rodent models of chronic inflammatory pain and peripheral neuropathic pain. However, large group sizes are needed to ensure studies are adequately powered due to considerable inter-animal variability. PMID:27242458

  5. A Conceptual Model of Pain Assessment for Noncommunicative Persons with Dementia

    ERIC Educational Resources Information Center

    Snow, A. Lynn; O'Malley, Kimberly J.; Cody, Marisue; Kunik, Mark E.; Ashton, Carol M.; Beck, Cornelia; Bruera, Eduardo; Novy, Diane

    2004-01-01

    Purpose: Our objectives are to present a conceptual model of the pain assessment process in persons with dementia and discuss methods for validating our model within this population. Design and Methods: This conceptual work is based on an integrative review and current pain theory, pain assessment research in demented and nondemented populations,…

  6. Acute Effect of Topical Menthol on Chronic Pain in Slaughterhouse Workers with Carpal Tunnel Syndrome: Triple-Blind, Randomized Placebo-Controlled Trial

    PubMed Central

    Jakobsen, Markus D.; Jay, Kenneth; Colado, Juan Carlos

    2014-01-01

    Topical menthol gels are classified “topical analgesics” and are claimed to relieve minor aches and pains of the musculoskeletal system. In this study we investigate the acute effect of topical menthol on carpal tunnel syndrome (CTS). We screened 645 slaughterhouse workers and recruited 10 participants with CTS and chronic pain of the arm/hand who were randomly distributed into two groups to receive topical menthol (Biofreeze) or placebo (gel with a menthol scent) during the working day and 48 hours later the other treatment (crossover design). Participants rated arm/hand pain intensity during the last hour of work (scale 0–10) immediately before 1, 2, and 3 hours after application. Furthermore, global rating of change (GROC) in arm/hand pain was assessed 3 hours after application. Compared with placebo, pain intensity and GROC improved more following application of topical menthol (P = 0.026 and P = 0.044, resp.). Pain intensity of the arm/hand decreased by −1.2 (CI 95%: −1.7 to −0.6) following topical menthol compared with placebo, corresponding to a moderate effect size of 0.63. In conclusion, topical menthol acutely reduces pain intensity during the working day in slaughterhouse workers with CTS and should be considered as an effective nonsystemic alternative to regular analgesics in the workplace management of chronic and neuropathic pain. PMID:25298894

  7. Acute vulvar pain in a lady with post circumcision inclusion cyst of the vulva containing stones: a case report

    PubMed Central

    2014-01-01

    Background Despite global eradication efforts, female genital cutting is still deep routed practice in some parts of Asia and East Africa. The crude and unscientific natures of the practice lead to many complications. Epidermoid inclusion cysts of the vulva are one of the late complications of female genital cutting and typically present as painless cystic swellings. But clinical presentation as ‘stone’ containing, hard vulvar mass is reported only once in the literature and presentation with acute vulvar pain has never been documented. Case presentation A 21 yrs old, Ethiopian, unmarried, lady presented with sever acute vulvar pain, discharge, and a stony hard vulvar swelling 13 years after type-III female genital cutting (infibulation). Surgical excision of the cyst, which contained two ‘stones’ inside it, and defibulation were done. Histopathology confirmed calcified, keratinizing epidermoid inclusion cyst of the vulva. Conclusions Clinicians, in areas where female genital cutting is prevalent, should be aware of such unusual late vulvar complication of the practice which might be misdiagnosed for other solid vulvar swellings and be familiar with the appropriate management. PMID:24387298

  8. Role of Ketamine in Acute Postoperative Pain Management: A Narrative Review

    PubMed Central

    Radvansky, Brian M.; Shah, Khushbu; Parikh, Anant; Sifonios, Anthony N.; Le, Vanny; Eloy, Jean D.

    2015-01-01

    Objectives. The objective of this narrative review was to examine the usage of ketamine as a postoperative analgesic agent across a wide variety of surgeries. Design. A literature search was performed using the phrases “ketamine” and “postoperative pain.” The authors analyzed the studies that involved testing ketamine's effectiveness at controlling postoperative pain. Effectiveness was assessed through various outcomes such as the amount of opiate consumption, visual analog scale (VAS) pain scores, and persistent postoperative pain at long-term follow-up. Results. While many different administration protocols were evaluated, delivering ketamine both as a pre- or perioperative bolus and postoperative infusion for up to 48 hours appeared to be the most effective. These effects are dose-dependent. However, a number of studies analyzed showed no benefit in using ketamine versus placebo for controlling postoperative pain. While ketamine is a safe and well-tolerated drug, it does have adverse effects, and there are concerns for possible neurotoxicity and effects on memory. Conclusions. In a number of limited situations, ketamine has shown some efficacy in controlling postoperative pain and decreasing opioid consumption. More randomized controlled trials are necessary to determine the surgical procedures and administrations (i.e., intravenous, epidural) that ketamine is best suited for. PMID:26495312

  9. Emotional Contrast or Compensation? How Support Reminders Influence the Pain of Acute Peer Disapproval in Preadolescents

    ERIC Educational Resources Information Center

    Thomaes, Sander; Sedikides, Constantine; Reijntjes, Albert; Brummelman, Eddie; Bushman, Brad J.

    2015-01-01

    When children experience habitual peer difficulties, adults often remind them that many people care about them. How do such reminders of support impact children's emotional responses to acute experiences of peer disapproval? Intuitively, support reminders would exert compensatory effects attenuating the emotional impact of acute disapproval.…

  10. Acute exercise prevents the development of neuropathic pain and the sprouting of non-peptidergic (GDNF- and artemin-responsive) c-fibers after spinal cord injury

    PubMed Central

    Detloff, Megan Ryan; Smith, Evan J.; Molina, Daniel Quiros; Ganzer, Patrick D.; Houlé, John D

    2014-01-01

    Spinal cord injury (SCI) impaired sensory fiber transmission leads to chronic, debilitating neuropathic pain. Sensory afferents are responsive to neurotrophic factors, molecules that are known to promote survival and maintenance of neurons, and regulate sensory neuron transduction of peripheral stimuli. A subset of primary afferent fibers responds only to the glial cell-line derived neurotrophic factor (GDNF) family of ligands (GFLs) and are non-peptidergic. In peripheral nerve injury models, restoration of GDNF or artemin (another GFL) to pre-injury levels within the spinal cord attenuates neuropathic pain. One noninvasive approach to increase the levels of GFLs in the spinal cord is through exercise (Ex), and to date exercise training is the only ameliorative, nonpharmacological treatment for SCI-induced neuropathic pain. The purpose of this study was three fold: 1) to determine whether exercise affects the onset of SCI-induced neuropathic pain; 2) to examine the temporal profile of GDNF and artemin in the dorsal root ganglia and spinal cord dorsal horn regions associated with forepaw dermatomes after SCI and Ex; and 3) to characterize GFL-responsive sensory fiber plasticity after SCI and Ex. Adult, female, Sprague-Dawley rats received a moderate, unilateral spinal cord contusion at C5. A subset of rats was exercised (SCI+Ex) on automated running wheels for 20 minutes, 5d/week starting at 5 days post injury (dpi), continuing until 9 or 37 dpi. Hargreaves' and von Frey testing was performed preoperatively and weekly post SCI. Forty-two percent of rats in the unexercised group exhibited tactile allodynia of the forepaws while the other 58% retained normal sensation. The development of SCI-induced neuropathic pain correlated with a marked decrease in the levels of GDNF and artemin in the spinal cord and DRGs. Additionally, a dramatic increase in the density and the distribution throughout the dorsal horn of GFL-responsive afferents was observed in rats with SCI

  11. Chronic Low Back Pain: Toward an Integrated Psychosocial Assessment Model.

    ERIC Educational Resources Information Center

    Strong, Jenny; And Others

    1994-01-01

    Integrated six dimensions of chronic low back pain (pain intensity, functional disability, attitudes toward pain, pain coping strategies, depression, illness behavior) to provide multidimensional patient profile. Data from 100 patients revealed presence of three distinct patient groups: patients who were in control, patients who were depressed and…

  12. Electrical stimulation as a treatment intervention to improve function, edema or pain following acute lateral ankle sprains: A systematic review.

    PubMed

    Feger, Mark A; Goetschius, John; Love, Hailey; Saliba, Sue A; Hertel, Jay

    2015-11-01

    The purpose of this systematic review was to assess whether electrical stimulation (ES), when used in conjunction with a standard treatment, can reduce levels of functional impairment, edema, and pain compared to a standard treatment alone, in patients following a lateral ankle sprain. We searched PubMed, CINAHL, SportDiscus, and Medline (OVID) databases through June 2014 using the terms "ankle sprain or ankle sprains or ligament injury or ligamentous injury," and "electric stimulation or electric stimulation or electrotherapy." Our search identified four randomized control trials, of which, neuromuscular ES and high-voltage pulsed stimulation were the only two ES modalities utilized. Effect sizes and 95% confidence intervals (CI) were estimated using Cohen's d for comparison between treatment groups. Three of four effect sizes for function had 95% CI that crossed zero. Twenty-four of the thirty-two effect sizes for edema had 95% CI that crossed zero. All effect sizes for pain had 95% CI that crossed zero. Therefore, the use of ES is not recommended as a means to improve function, reduce edema, or decrease pain in the treatment of acute lateral ankle sprains. PMID:25791198

  13. Reversal of Acute Complex Regional Pain Syndrome Using the Practical Application of Neurodiagnostic Evaluation Process: A Case Study

    PubMed Central

    Anderson, Karen E

    2013-01-01

    In 2005, a patient in my practice developed complex regional pain syndrome type 1 (CRPS 1) after bunion surgery. The condition was properly diagnosed within 4 weeks with a diagnostic technique that I routinely use to diagnose chronic musculoskeletal pain, and it was successfully treated. The tests, which are based on primitive and postural reflexes in infants, were adapted to reflect normal and abnormal motor behaviors in adults after provocation of reflexes of the autonomic nervous system (afferent C fibers in peripheral nerves). Approximately 60 days after my patient’s operation, the tests indicated a positive reflex at the posterior tibial nerve in the operated foot. Surgery to remove an accessory ossicle from the talus adjacent to this nerve resolved the CRPS 1 within 2 weeks. Since CRPS 1 is a dysfunctional state of the autonomic regulatory control of pain, it was postulated that a test based on autonomic nerve function could isolate the source of CRPS 1. The Practical Application of Neurodiagnostic Evaluation process was shown to be diagnostic for the cause of acute CRPS 1 and to allow its reversal. Further evaluation of the test for diagnosis and treatment of CRPS is needed. PMID:24355904

  14. G9a Is Essential for Epigenetic Silencing of K+ Channel Genes in Acute-to-Chronic Pain Transition

    PubMed Central

    Laumet, Geoffroy; Garriga, Judit; Chen, Shao-Rui; Zhang, Yuhao; Li, De-Pei; Smith, Trevor M.; Dong, Yingchun; Jelinek, Jaroslav; Cesaroni, Matteo; Issa, Jean-Pierre; Pan, Hui-Lin

    2015-01-01

    Neuropathic pain is a debilitating clinical problem and difficult to treat. Nerve injury causes a long-lasting reduction in K+ channel expression in the dorsal root ganglion (DRG), but little is known about the epigenetic mechanisms involved. Here we show that nerve injury increased H3K9me2 occupancy at Kcna4, Kcnd2, Kcnq2 and Kcnma1 promoters but did not affect DNA methylation levels of these genes in DRGs. Nerve injury increased activity of G9a, histone deacetylases and EZH2, but only G9a inhibition consistently restored K+ channel expression. Selective G9a knockout in DRG neurons completely blocked K+ channel silencing and chronic pain development after nerve injury. Remarkably, RNA sequencing analysis revealed that G9a inhibition not only reactivated 40 of 42 silenced K+ channel genes but also normalized 638 genes down- or up-regulated by nerve injury. Thus G9a plays a dominant role in transcriptional repression of K+ channels and in acute-to-chronic pain transition after nerve injury. PMID:26551542

  15. Chiropractic care for patients with acute neck pain: results of a pragmatic practice-based feasibility study☆

    PubMed Central

    Haneline, Michael T.; Cooperstein, Robert

    2009-01-01

    Abstract Objective The purpose of this study was to determine the feasibility of a chiropractic practice-based research network to investigate the treatment of acute neck pain (ANP) and to report resulting findings. Methods Participating chiropractors recruited sequentially presenting ANP patients on their initial visit to the office. Patients were treated by the chiropractors using their usual methods. Data were prospectively collected by having patients complete the Neck Disability Index, Characteristic Pain Intensity score, and a patient satisfaction questionnaire. Questionnaires were completed during routine office visits at baseline and then at weeks 1, 2, 4, 8, and 26, either in the office or by mail. Results Ten chiropractors supplied data on 99 patients. The number of cases contributed by each of the participating chiropractors ranged from 1 to 54, with a mean (SD) of 9.2 (10.5). Mean (SD) Neck Disability Index scores were 36 (17.9) at baseline and 9.8 (12.2) at the final evaluation; the Characteristic Pain Intensity scores were initially 55.3 (20.4) and were 24.5 (21.5) at the final evaluation. Transient minimal adverse effects were reported by chiropractors for only 7 (7.8%) patients. No serious adverse reactions were reported. Conclusion The practice-based research methodology used in this study appears to be a feasible way to investigate chiropractic care for ANP, and its methodologies could be used to plan future research. PMID:19948305

  16. Treatment of acute, non-traumatic pain using a combination of diclofenac-cholestyramine, uridine triphosphate, cytidine monophosphate, and hydroxycobalamin.

    PubMed

    Mibielli, Marco Antonio; Nunes, Carlos Pereira; Cohen, José Carlos; Scussel, Ari Boulanger; Higashi, Rafael; Bendavit, Gabriel Gherman; Oliveira, Lisa; Geller, Mauro

    2010-01-01

    This randomized, controlled, double-blind clinical study in parallel groups evaluated the safety and efficacy of an oral combination diclofenac-cholestyramine, nucleotides (uridine and cytidine) and vitamin B12 versus the oral combination of nucleotides and vitamin B12 in the treatment of acute, non-traumatic pain. Subjects received twice-daily, 10-day oral administration of diclofenac-cholestyramine + uridine + cytidine + vitamin B12 (Group DN, n=40) or uridine + cytidine + vitamin B12 (Group NB, n=41). The primary study endpoint was the number of subjects with VAS reduction of >30mm after 10 days of treatment. Secondary endpoints included the number of patients with improvement >5 points in the Patient Functionality Questionnaire after 10 days of treatment, and the number of subjects presenting adverse events. Treatment with the combination of diclofenac-cholestyramine, nucleotides and Vitamin B12 resulted in a higher number of subjects with VAS score reductions >30mm after 10 days of treatment (87.5% subjects) than in the control group administered nucleotides and Vitamin B12 (51.23% of subjects), (p>0.0006). A significantly higher number of subjects in the DN group (80%) had a score reduction of >5 points in the Patient Functionality Questionnaire at after 10 days of treatment compared to Group NB (29.3%), (p<0.001). The number of subjects presenting AEs did not vary significantly between treatment groups (p=0.587). The combination of diclofenac-cholestyramine with uridine, cytidine and vitamin B12 was well-tolerated over a 10-day treatment period. The combination reduced pain and improved functionality among subjects presenting acute, non-traumatic pain in the lower back, hips, and neck. PMID:22128442

  17. Experimental human pain models in gastro-esophageal reflux disease and unexplained chest pain

    PubMed Central

    Drewes, Asbjørn Mohr; Arendt-Nielsen, Lars; Funch-Jensen, Peter; Gregersen, Hans

    2006-01-01

    Methods related to experimental human pain research aim at activating different nociceptors, evoke pain from different organs and activate specific pathways and mechanisms. The different possibilities for using mechanical, electrical, thermal and chemical methods in visceral pain research are discussed with emphasis of combinations (e.g., the multimodal approach). The methods have been used widely in assessment of pain mechanisms in the esophagus and have contributed to our understanding of the symptoms reported in these patients. Hence abnormal activation and plastic changes of central pain pathways seem to play a major role in the symptoms in some patients with gastro-esophageal reflux disease and in patients with functional chest pain of esophageal origin. These findings may lead to an alternative approach for treatment in patients that does not respond to conventional medical or surgical therapy. PMID:16718803

  18. Human experimental pain models: A review of standardized methods in drug development

    PubMed Central

    Reddy, K. Sunil kumar; Naidu, M. U. R.; Rani, P. Usha; Rao, T. Ramesh Kumar

    2012-01-01

    Human experimental pain models are essential in understanding the pain mechanisms and appear to be ideally suited to test analgesic compounds. The challenge that confronts both the clinician and the scientist is to match specific treatments to different pain-generating mechanisms and hence reach a pain treatment tailored to each individual patient. Experimental pain models offer the possibility to explore the pain system under controlled settings. Standardized stimuli of different modalities (i.e., mechanical, thermal, electrical, or chemical) can be applied to the skin, muscles, and viscera for a differentiated and comprehensive assessment of various pain pathways and mechanisms. Using a multimodel-multistructure testing, the nociception arising from different body structures can be explored and modulation of specific biomarkers by new and existing analgesic drugs can be profiled. The value of human experimental pain models is to link animal and clinical pain studies, providing new possibilities for designing successful clinical trials. Spontaneous pain, the main compliant of the neuropathic patients, but currently there is no human model available that would mimic chronic pain. Therefore, current human pain models cannot replace patient studies for studying efficacy of analgesic compounds, although being helpful for proof-of-concept studies and dose finding. PMID:23626642

  19. Can Chronic Pain Be Prevented?

    PubMed

    Badiola, Ignacio J

    2016-06-01

    All chronic pain begins at some discrete point in time. Significant strides in the understanding of mechanisms and risk factors associated with the transition from a new, or acute, pain experience to a chronic pain condition have been made over the past 20 years. These insights provide the hope of one day being able to modify or even halt this pathophysiologic progression. This article reviews some of the current knowledge of this transition as well as the evidence currently available to best prevent and treat it using persistent surgical pain as a model. PMID:27208712

  20. Evidence-based practice for pain management for cancer patients in an acute care setting.