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Sample records for catheterization indications techniques

  1. Catheterization.

    ERIC Educational Resources Information Center

    Lewis, Mary Bell; Moseley, James L.

    This module is designed to teach the fundamentals of clean intermittent urinary catheterization for the disabled child, particularly in the school setting. The text includes information on proper hand washing techniques, the supplies needed, suggested settings, and the preparations required before and after the catheter is inserted into the…

  2. Basic Surgical Techniques in the Göttingen Minipig: Intubation, Bladder Catheterization, Femoral Vessel Catheterization, and Transcardial Perfusion

    PubMed Central

    Ettrup, Kaare S.; Glud, Andreas N.; Orlowski, Dariusz; Fitting, Lise M.; Meier, Kaare; Soerensen, Jens Christian; Bjarkam, Carsten R.; Alstrup, Aage K. Olsen

    2011-01-01

    The emergence of the Göttingen minipig in research of topics such as neuroscience, toxicology, diabetes, obesity, and experimental surgery reflects the close resemblance of these animals to human anatomy and physiology 1-6.The size of the Göttingen minipig permits the use of surgical equipment and advanced imaging modalities similar to those used in humans 6-8. The aim of this instructional video is to increase the awareness on the value of minipigs in biomedical research, by demonstrating how to perform tracheal intubation, transurethral bladder catheterization, femoral artery and vein catheterization, as well as transcardial perfusion. Endotracheal Intubation should be performed whenever a minipig undergoes general anesthesia, because it maintains a patent airway, permits assisted ventilation and protects the airways from aspirates. Transurethral bladder catheterization can provide useful information about about hydration state as well as renal and cardiovascular function during long surgical procedures. Furthermore, urinary catheterization can prevent contamination of delicate medico-technical equipment and painful bladder extension which may harm the animal and unnecessarily influence the experiment due to increased vagal tone and altered physiological parameters. Arterial and venous catheterization is useful for obtaining repeated blood samples and monitoring various physiological parameters. Catheterization of femoral vessels is preferable to catheterization of the neck vessels for ease of access, when performing experiments involving frame-based stereotaxic neurosurgery and brain imaging. When performing vessel catheterization in survival studies, strict aseptic technique must be employed to avoid infections6. Transcardial perfusion is the most effective fixation method, and yields preeminent results when preparing minipig organs for histology and histochemistry2,9. For more information about anesthesia, surgery and experimental techniques in swine in general we refer to Swindle 2007. Supplementary information about premedication and induction of anesthesia, assisted ventilation, analgesia, pre- and postoperative care of Göttingen minipigs are available via the internet at http://www.minipigs.com10. For extensive information about porcine anatomy we refer to Nickel et al. Vol. 1-511. PMID:21730947

  3. Pediatric Catheterization Protocol.

    PubMed

    Sheikh, N

    2015-07-01

    During the last decade, significant technological progress has taken place in the pediatric cardiac catheterization laboratory. Improved noninvasive diagnostic techniques have narrowed down the indications for diagnostic cardiac catheterization, and these techniques are now increasingly being applied to therapeutic procedures. Recently, concern has been raised about the appropriateness of some these applications in pediatric therapeutic cardiac catheterization because of sheer increase in number of techniques being applied, the increase in the number of persons and centers using these techniques, and the increase in the number of lesion types thought to be amenable to catheter therapy. In comparison to diagnostic cardiac catheterization, therapeutic catheterization require more time and resources, involve higher cost and risk, and demand more technical competence and expertise. Higher level of skill and competency is requirement for the operator who performs the various therapeutic catheterization techniques. These procedures should only be performed in institutions equipped with appropriate facilities, personnel, and programs. These considerations, combined with the rapid increase in the number of laboratories and cardiologists performing therapeutic catheterization procedures, raises concern about the safety of patients and human subjects as well as credentials of hospital and level of training and skill of physician involved. Therapeutic catheterization training programs vary in type, extent, and quality. Due to the complexity and potential risks of these procedures, specific skill and competency benchmark should be developed for personnel undergoing training in therapeutic catheterization as well as for those who continue to perform various procedures. Competency in therapeutic catheterization in children requires specific training. Pediatric cardiology fellows should receive therapeutic catheterization training in one or more centers that specializes in angioplasties, valvuloplasties, and/or vascular occlusion procedures. Before performing a therapeutic catheterization as the primary operator, the fellow or practicing pediatric cardiologist should be required to receive procedure-specific training under the supervision of a qualified individual. Credential should be procedure specific. To maintain his or her credentials and skills, the cardiologist should perform or supervise an adequate number of cases annually, and the results must compare favorably with national experience. The cardiologist must keep himself up to date of new trends and progress in the field through scientific reading and attendance of meetings. Interventional pediatric cardiology has grown remarkably over the last two decades. Catheter based interventional procedures have become the treatment of choice for many cardiac lesions, and these procedures serve as alternatives or adjuncts to surgical treatment for many other relevant conditions. Keeping with the pace of development worldwide, catheter based interventional procedures are making good progress in Bangladesh as well. PMID:26329970

  4. Cardiac Catheterization

    MedlinePLUS

    ... done during a cardiac catheterization include: closing small holes inside the heart repairing leaky or narrow heart ... bandage. It's normal for the site to be black and blue, red, or slightly swollen for a ...

  5. Knowledge and attitude of doctors and nurses regarding indication for catheterization and prevention of catheter-associated urinary tract infection in a tertiary care hospital

    PubMed Central

    Jain, Manisha; Dogra, Vinita; Mishra, Bibhabati; Thakur, Archana; Loomba, Poonam Sood

    2015-01-01

    Background and Aims: Catheter-associated urinary tract infection (CAUTI) is one of the most common health care acquired infection encountered in clinical practice. The present study was planned to assess the knowledge and attitude of health care providers regarding the indications for catheterization and methods of preventing CAUTI. Methods: A prospective questionnaire-based survey was done from March 2011 to August 2011. A structured questionnaire comprising of 41 items related to demographic details of the respondents, their knowledge regarding indications for catheterization and methods of preventing CAUTI was given to 54 doctors and 105 nurses. The response was evaluated for statistical correlation using a computer software. Results: The mean years of experience of the respondents in the health care setup was 6.8 years. Only 57% of the respondents could identify all the measures for prevention of CAUTI. The knowledge regarding the indication for catheterization though suboptimal was significantly better amongst the doctors as compared to nurses. Conclusion: The knowledge regarding indication and preventive measures was suboptimal in our study group. There is a tremendous scope of improvement in catheterization practices in our hospital and education induced intervention would be the most appropriate effort toward reducing the incidence of CAUTI. PMID:25722548

  6. A simple sheath removal after open trans-femoral catheterization procedure: the ZIP technique.

    PubMed

    Du Cailar, Claude; Gandet, Thomas; Du Cailar, Marie; Albat, Bernard

    2014-04-01

    The ZIP technique, a surgical equivalent of the 'Preclose' technique, useful for transcatheter aortic valve implantation or endovascular aortic aneurysm repair is described. While percutaneous closure devices are expensive, need a long learning curve and are associated with primary failure, the ZIP technique is easy and allows a quick, safe and anatomical closure of the artery. This procedure avoids arterial cross-clamping and no purse-string effect was demonstrated using Doppler ultrasound examination. PMID:23886993

  7. The history of cardiac catheterization.

    PubMed

    Bourassa, Martial G

    2005-10-01

    The evolution of cardiac catheterization has occurred over at least four centuries. One of the first major steps was the description of the circulation of the blood by William Harvey in 1628. The next milestone was the measurement of arterial pressure by Stephen Hales, one century later. However, the 19th century represented the golden age of cardiovascular physiology, highlighted by the achievements of Carl Ludwig, Etienne-Jules Marey and Claude Bernard, among others. Human cardiac catheterization developed during the 20th century. The first right heart catheterization in a human was performed by Werner Forssmann on himself in 1929. Diagnostic cardiac catheterization was introduced by André Cournand and Dickinson Richards in the early 1940s, and selective coronary angiography was described by Mason Sones in the early 1960s. More recently, with the advent of catheter-based interventions, pioneered by Andreas Gruentzig in the late 1970s, there has been considerable progress in the refinement and expansion of these techniques. Currently, the Sones technique is used only infrequently, and coronary angiography and percutaneous coronary intervention rely mainly on percutaneous femoral and percutaneous radial artery approaches. On the occasion of the 50th anniversary of the Montreal Heart Institute, it seems appropriate to highlight the contribution of this institution in these two areas. PMID:16234881

  8. Endoscopic transcervical catheterization in the domestic cat.

    PubMed

    Zambelli, D; Bini, C; Cunto, M

    2015-02-01

    Feline-assisted reproduction is still not routinely performed in veterinary practice, although there is an increasing interest on the subject by cat breeders. In recent years, many techniques for artificial insemination in the domestic cat have been developed with regard to the intrauterine deposition of sperm through the catheterization of the cervix. Transcervical catheterization has been described also for diagnostic and therapeutic purposes. This article provides the first description of a new method for cervical catheterization, under the direct visualization of the cervix, using a rigid endoscope and a new specially designed transcervical catheter. The procedure was performed on 14 queens with a success rate of 85.71%. PMID:25358819

  9. Fallopian Tube Catheterization

    PubMed Central

    Thurmond, Amy Suzanne

    2013-01-01

    Fallopian tube catheterization is used for treatment of infertility caused by proximal tubal occlusion, and has replaced surgical treatment for this condition. More recently, fallopian tube catheterization has been used for tubal sterilization. Interventional radiologists tested numerous methods for tubal occlusion using the rabbit as an animal model. As a result, a tubal device has recently been Food and Drug Administration approved for permanent sterilization using hysteroscopic guidance; it can also be placed fluoroscopically by fallopian tube catheterization as an “off-label” procedure. This is a 5-year continuation and update on a procedure that has been done by interventional radiologists for 25 years; history of the development of fallopian tube catheterization in women has been published in detail in this journal. Highlighted in this article will be description of the basic components needed for fallopian tube catheterization. PMID:24436565

  10. Left heart catheterization

    MedlinePLUS

    Catheterization - left heart ... to help guide the catheters up into your heart and arteries. Dye will be injected into your ... in the blood vessels that lead to your heart. The catheter is then moved through the aortic ...

  11. Bladder catheterization, male (image)

    MedlinePLUS

    ... kept empty (decompressed) and urinary flow assured. The balloon holds the catheter in place for a duration of time. Catheterization in males is slightly more difficult and uncomfortable than in females because of the longer urethra.

  12. Midface-lifting: evolution, indications, and technique.

    PubMed

    Hachach-Haram, Nadine; Kirkpatrick, W Niall A

    2013-08-01

    The youthful face is often defined by malar and lateral cheek fullness with associated submalar concavity, giving a smooth contour between the different subunits coupled with an aesthetically pleasing convex lower eyelid-cheek continuum. This article reviews the key anatomical concepts of midfacial aging, the evolution of midface-lifting techniques, and indications and contraindications for their use. PMID:23884850

  13. Changing techniques and indications for lamellar keratoplasty.

    PubMed

    Facskó, A; Nagy, A; Balázs, K; Berta, A

    1997-01-01

    In recent decades, the number of lamellar keratoplasties (LKs) being performed worldwide has been gradually decreasing. However, new technical procedures have been developed and microsurgeons must consider modified indications for lamellar grafting. In the period 1946-1995, in the Department of Ophthalmology University Medical School of Debrecen, Hungary 3889 consecutive keratoplasties were performed of which 608 were LKs. In the period 1946-1960 special surgical material (biosutures) was used without operating microscopes and the leading indication for LK was corneal scar (leukomas). Between 1961 and 1979 with the development of microsurgical procedures (10/0 nylon sutures, operating microscope), the LK technique became more advanced. In the period 1979-1995 precision lamellar grafting could be performed with the widely available improved modern techniques. Changing indications for LK were noted in the second period and this tendency has subsequently continued. Currently the main indications for LK are "immediate" keratoplasty after chemical burns, and sclerokeratoplasty against recurrent pterygia. Their observations lead the authors to conclude that the possible reasons for the changing indications of LK are the new technical procedures, the increasing knowledge, the better immunological tests and the improved postoperative therapy. PMID:9408295

  14. Indications and surgical techniques for digit replantation.

    PubMed

    Kaplan, F T; Raskin, K B

    Finger amputations are devastating, life-changing injuries. They can occur from many different types of injury, but most often are caused by power tools or machinery in the workplace. Modern microvascular surgical techniques have enabled surgeons to successfully reattach fingers that have been amputated at almost level of injury. Patient outcome and digit viability have improved as surgeons have gained more experience with microvascular techniques, and have narrowed the operative indications for replantation. Currently, replantation is recommended for amputated thumbs, multiple digit amputations, and single digit amputations distal to the FDS insertion, as well as all amputations in children. Replantation surgery is technically demanding. Success relies on patient selection, meticulous operative technique, and postoperative monitoring. Most patients have successful outcomes with at least protective sensation and useful range of motion in the replanted digit. Though complications, including joint stiffness, tendon adhesions, malunion, and cold intolerance are not infrequent, patient satisfaction following replantation is high. PMID:12102407

  15. Indications, stains and techniques in chromoendoscopy

    PubMed Central

    Trivedi, P.J.

    2013-01-01

    Early detection of malignancies within the gastrointestinal tract is essential to improve the prognosis and outcome of affected patients. However, conventional white light endoscopy has a miss rate of up to 25% for gastrointestinal pathology, specifically in the context of small and flat lesions within the colon. Chromoendoscopy and other advanced imaging techniques aim at facilitating the visualization and detection of neoplastic lesions and have been applied throughout the gastrointestinal tract. Chromoendoscopy, particularly in combination with magnifying endoscopy has significantly improved means to detect neoplastic lesions in the gastrointestinal mucosa, particularly in ulcerative colitis and Crohn’s colitis. In addition, chromoendoscopy is beneficial in the upper gastrointestinal tract, especially when evaluating Barrett’s oesophagus (BO) for the presence of dysplasia. Furthermore, it also improves characterization, differentiation and diagnosis of endoscopically detected suspicious lesions, and helps to delineate the extent of neoplastic lesions that may be amenable to endoscopic resection. This review discusses the dyes, indications and advanced endoscopic imaging methods used in various chromoendoscopic techniques, and presents a critical overview of the existing evidence supporting their use in current practice with a particular emphasis on the role in inflammatory bowel disease and BO. PMID:23097386

  16. Doppler-guided retrograde catheterization system

    NASA Astrophysics Data System (ADS)

    Frazin, Leon J.; Vonesh, Michael J.; Chandran, Krishnan B.; Khasho, Fouad; Lanza, George M.; Talano, James V.; McPherson, David D.

    1991-05-01

    The purpose of this study was to investigate a Doppler guided catheterization system as an adjunctive or alternative methodology to overcome the disadvantages of left heart catheterization and angiography. These disadvantages include the biological effects of radiation and the toxic and volume effects of iodine contrast. Doppler retrograde guidance uses a 20 MHz circular pulsed Doppler crystal incorporated into the tip of a triple lumen multipurpose catheter and is advanced retrogradely using the directional flow information provided by the Doppler waveform. The velocity detection limits are either 1 m/second or 4 m/second depending upon the instrumentation. In a physiologic flow model of the human aortic arch, multiple data points revealed a positive wave form when flow was traveling toward the catheter tip indicating proper alignment for retrograde advancement. There was a negative wave form when flow was traveling away from the catheter tip if the catheter was in a branch or bent upon itself indicating improper catheter tip position for retrograde advancement. In a series of six dogs, the catheter was able to be accurately advanced from the femoral artery to the left ventricular chamber under Doppler signal guidance without the use of x-ray. The potential applications of a Doppler guided retrograde catheterization system include decreasing time requirements and allowing safer catheter guidance in patients with atherosclerotic vascular disease and suspected aortic dissection. The Doppler system may allow left ventricular pressure monitoring in the intensive care unit without the need for x-ray and it may allow left sided contrast echocardiography. With pulse velocity detection limits of 4 m/second, this system may allow catheter direction and passage into the aortic root and left ventricle in patients with aortic stenosis. A modification of the Doppler catheter may include transponder technology which would allow precise catheter tip localization once the catheter tip is placed in the aortic root. Such technology may conceivably assist in allowing selective coronary catheterization. These studies have demonstrated that Doppler guided retrograde catheterization provides an accurate method to catheterization the aortic root and left ventricular chamber without x-ray. In humans, it may prove useful in a variety of settings including the development of invasive ultrasonic diagnostic and therapeutic technology.

  17. [Discoscanner: indications, technique, tips and tricks, interpretation].

    PubMed

    Amoretti, N; Hauger, O; Poussange, N; Browaeys, P; Huwart, L; Marcy, P-Y; Amoretti, M-E; Hovorka, I; Coco, L; Benzaken, T; Nouri, Y; Bronsard, N; Ibba, C; Boileau, P

    2012-03-01

    Discography test associated with the scanner (discoscanner) is an exam that has been a renewed interest in recent few years. Thanks to the emergence of new interventions such as disc prosthesis, the procedures require confirmation of the disc level to deal with and the origin of discogenic symptoms. The aim of this paper is to describe the techniques, challenges and tips as well as the interpretation of functional and morphological examination. PMID:21821290

  18. Oncoplastic breast surgery: indications, techniques and perspectives

    PubMed Central

    Montag, Eduardo; Gemperli, Rolf

    2013-01-01

    Breast-conservation surgery (BCS) is established as a safe option for most women with early breast cancer. Recently, advances in oncoplastic techniques have reduced surgical trauma and thus are capable of preserving the breast form and quality of life. In spite of the most BCS defects can be managed with primary closure, the aesthetic outcome may be unpredictable. Oncoplastic reconstruction may begin at the time of BCS (immediate), weeks (delayed-immediate) or months to years afterwards (delayed). With immediate reconstruction, the surgical process is smooth, since both procedures can be associated in one operative setting. Additionally, it permits wider excision of the tumor, with a superior mean volume of the specimen and potentially reducing the incidence of margin involvement. The oncoplastic techniques are related to volume displacement or replacement procedures including local flaps, latissimus dorsi myocutaneous flap and reduction mammaplasty/masthopexy. Regardless of the fact that there is no consensus concerning the best approach, the criteria are determined by the surgeon’s experience and the size of the defect in relation to the size of the remaining breast. On the basis of our 15-year experience, it is possible to identify trends in types of breast defects and to develop an algorithm for immediate BCS reconstruction on the basis of the initial breast volume, the extent/location of glandular tissue ressection and the remaining available breast tissue. The main advantages of the technique utilized should include reproducibility, low interference with the oncologic treatment and long-term results. Surgical planning should include the patients’s preferences, and chiefly addressing individual reconstructive requirements, enabling each patient to receive an individual “custom-made” reconstruction. PMID:25083476

  19. Oncoplastic breast surgery: indications, techniques and perspectives.

    PubMed

    Munhoz, Alexandre Mendonça; Montag, Eduardo; Gemperli, Rolf

    2013-08-01

    Breast-conservation surgery (BCS) is established as a safe option for most women with early breast cancer. Recently, advances in oncoplastic techniques have reduced surgical trauma and thus are capable of preserving the breast form and quality of life. In spite of the most BCS defects can be managed with primary closure, the aesthetic outcome may be unpredictable. Oncoplastic reconstruction may begin at the time of BCS (immediate), weeks (delayed-immediate) or months to years afterwards (delayed). With immediate reconstruction, the surgical process is smooth, since both procedures can be associated in one operative setting. Additionally, it permits wider excision of the tumor, with a superior mean volume of the specimen and potentially reducing the incidence of margin involvement. The oncoplastic techniques are related to volume displacement or replacement procedures including local flaps, latissimus dorsi myocutaneous flap and reduction mammaplasty/masthopexy. Regardless of the fact that there is no consensus concerning the best approach, the criteria are determined by the surgeon's experience and the size of the defect in relation to the size of the remaining breast. On the basis of our 15-year experience, it is possible to identify trends in types of breast defects and to develop an algorithm for immediate BCS reconstruction on the basis of the initial breast volume, the extent/location of glandular tissue ressection and the remaining available breast tissue. The main advantages of the technique utilized should include reproducibility, low interference with the oncologic treatment and long-term results. Surgical planning should include the patients's preferences, and chiefly addressing individual reconstructive requirements, enabling each patient to receive an individual "custom-made" reconstruction. PMID:25083476

  20. [Indications and techniques of reconstruction after mastectomy].

    PubMed

    Koch, Nathalie; Delaloye, Jean-François; Raffoul, Wassim

    2012-10-24

    Reconstructive surgery takes an important place in breast cancer treatment. Immediate breast reconstruction is performed during the same operation as mastectomy. It is contraindicated following radiotherapy. Reconstruction performed after mastectomy is called differed breast reconstruction. It is completed 6 months after chemotherapy and 1 year after radiotherapy. Prosthetic breast reconstruction is indicated when tissues are of good qualities and breast are small. Autologous reconstruction is performed in case of radiotherapy or large breast. After breast reconstruction, imperfections can be corrected with autologous fat injection. PMID:23167073

  1. [Conservative treatment of breast cancer--indications and surgical technique].

    PubMed

    Murawa, P

    1994-11-01

    Comparison of the results of conservative surgery and radiotherapy with mastectomy in the treatment of the breast cancer are discussed. The indications, contraindications and surgical technique on conservative surgery are presented. PMID:7737545

  2. The effect of anesthetization and urinary bladder catheterization on renal function of rainbow trout

    USGS Publications Warehouse

    Hunn, J.B.; Willford, W.A.

    1970-01-01

    1. Rainbow trout were anesthetized with MS-222 (Sandoz) or methylpentynol and catheterized. Urine was collected at selected intervals up to 48 hr. 2. Effects of MS-222 anesthesia on urine flow and composition were isolated from the stress of catheterization by re-anesthetizing the fish 18 to 20 hr post catheterization. 3. Urine output patterns were similar following MS-222 or methylpentynol anesthesia and catheterization. Highest urine flows were measured 4 to 8 hr post treatment. The highest urine output after re-anesthetization with MS-222 was observed 2 to 4 hr post-anesthesia. 4. Highest concentrations of Na2+, K+, Ca2+, Cl- and inorganic PO4 in the urine were measured in the first 2 hr after anesthesia and catheterization. 5. Flow rates and chemical composition of urine indicate that "normal" renal function is re-established 12 to 24 hr post-treatment.

  3. Myocardial Perfusion Scintigraphy: Techniques, Interpretation, Indications and Reporting

    PubMed Central

    Fathala, Ahmed

    2011-01-01

    Myocardial perfusion single photon emission-computed tomography (MPS) has been one of the most important and common non-invasive diagnostic cardiac test. Gated MPS provides simultaneous assessment of myocardial perfusion and function with only one study. With appropriate attention to the MPS techniques, appropriate clinical utilization and effective reporting, gated MPS will remain a useful diagnostic test for many years to come. The aim of this article is to review the basic techniques of MPS, a simplified systematic approach for study interpretation, current clinical indications and reporting. After reading this article the reader should develop an understanding of the techniques, interpretation, current clinical indications and reporting of MPS studies. PMID:22048510

  4. Clean intermittent catheterization in the school setting.

    PubMed

    Katrancha, Elizabeth D

    2008-08-01

    Spina bifida (SB) is a neural tube defect that causes many physical and mental disabilities. Bowel and bladder incontinence is the disability seen most often in these students that requires the school nurse's attention. Clean intermittent catheterization (CIC) provides the student with SB a vehicle to reach a satisfactory level of continence, helps build self-esteem, and allows the student greater independence. The school nurse assists the student with SB with CIC in the school setting and reinforces the importance of correct technique with the student, family, and other personnel caring for the student. The success of a continence management program at school is dependent on all these individuals working together with the common goal of maintaining normal renal function, gaining urinary continence, and promoting independence of the student. PMID:18757352

  5. Venous catheterization with ultrasound navigation

    NASA Astrophysics Data System (ADS)

    Kasatkin, A. A.; Urakov, A. L.; Nigmatullina, A. R.

    2015-11-01

    By ultrasound scanning it was determined that respiratory movements made by chest of healthy and sick person are accompanied by respiratory chest rise of internal jugular veins. During the exhalation of an individual diameter of his veins increases and during the breath it decreases down to the complete disappearing if their lumen. Change of the diameter of internal jugular veins in different phases can influence significantly the results of vein puncture and cauterization in patients. The purpose of this research is development of the method increasing the efficiency and safety of cannulation of internal jugular veins by the ultrasound visualization. We suggested the method of catheterization of internal jugular veins by the ultrasound navigation during the execution of which the puncture of venous wall by puncture needle and the following conduction of J-guide is carried out at the moment of patient's exhalation. This method decreases the risk of complications development during catheterization of internal jugular vein due to exclusion of perforating wound of vein and subjacent tissues and anatomical structures.

  6. Full Endoscopic Spinal Surgery Techniques: Advancements, Indications, and Outcomes.

    PubMed

    Yue, James J; Long, William

    2015-01-01

    Advancements in both surgical instrumentation and full endoscopic spine techniques have resulted in positive clinical outcomes in the treatment of cervical, thoracic, and lumbar spine pathologies. Endoscopic techniques impart minimal approach related disruption of non-pathologic spinal anatomy and function while concurrently maximizing functional visualization and correction of pathological tissues. An advanced understanding of the applicable functional neuroanatomy, in particular the neuroforamen, is essential for successful outcomes. Additionally, an understanding of the varying types of disc prolapse pathology in relation to the neuroforamen will result in more optimal surgical outcomes. Indications for lumbar endoscopic spine surgery include disc herniations, spinal stenosis, infections, medial branch rhizotomy, and interbody fusion. Limitations are based on both non spine and spine related findings. A high riding iliac wing, a more posteriorly located retroperitoneal cavity, an overly distal or proximally migrated herniated disc are all relative contra-indications to lumbar endoscopic spinal surgery techniques. Modifications in scope size and visual field of view angulation have enabled both anterior and posterior cervical decompression. Endoscopic burrs, electrocautery, and focused laser technology allow for the least invasive spinal surgical techniques in all age groups and across varying body habitus. Complications include among others, dural tears, dysesthsia, nerve injury, and infection. PMID:26114086

  7. Identifying indicators through modified Delphi technique in polytechnics system

    NASA Astrophysics Data System (ADS)

    Nashir, Irdayanti Mat; Mustapha, Ramlee; Yusoff, Abdullah

    2015-02-01

    This study aims to examine how the panel has been selected as experts in assessing indicators of innovative instructional leadership (IIL) administrator in polytechnics based on 222 items were obtained through previous studies. A total of eleven people were selected as the expert panels in a study where expert selection criteria based on their background in the leadership. Experts were interviewed separately. Interviews were carried out for a half hour in their offices. The data obtained were analyzed using Atlas Ti. Overall findings indicate experts agree that a total of 188 items and 14 indicators should be maintained in this innovative instructional leadership instruments and next by using Modified Delphi Technique. The instrument will then be analyzed to obtain findings on the perception of lecturers on every administrator innovative instructional leadership in their respective polytechnics.

  8. Swan-Ganz - right heart catheterization

    MedlinePLUS

    ... you are in bed in an intensive care unit (ICU) of a hospital or in special procedure areas such as a cardiac catheterization laboratory. Before the test starts, you may be given medicine (sedative) to ...

  9. Propeller Flaps: A Review of Indications, Technique, and Results

    PubMed Central

    D'Arpa, Salvatore; Toia, Francesca; Pirrello, Roberto; Moschella, Francesco; Cordova, Adriana

    2014-01-01

    In the last years, propeller flaps have become an appealing option for coverage of a large range of defects. Besides having a more reliable vascular pedicle than traditional flap, propeller flaps allow for great freedom in design and for wide mobilization that extend the possibility of reconstructing difficult wounds with local tissues and minimal donor-site morbidity. They also allow one-stage reconstruction of defects that usually require multiple procedures. Harvesting of a propeller flap requires accurate patient selection, preoperative planning, and dissection technique. Complication rate can be kept low, provided that potential problems are prevented, promptly recognized, and adequately treated. This paper reviews current knowledge on propeller flaps. Definition, classification, and indications in the different body regions are discussed based on a review of the literature and on the authors' experience. Details about surgical technique are provided, together with tips to avoid and manage complications. PMID:24971367

  10. Idiopathic unilateral hypoplasia of internal jugular vein and coagulopathy: Unusual case for central venous catheterization

    PubMed Central

    Nama, Rajnish K.; Bhosale, Guruprasad P.; Shah, Veena R.

    2015-01-01

    Central venous catheterization (CVC) is routinely done procedure in ICU or during surgery for various indications. Right Internal jugular vein (IJV) is preferred vessel among different routes for CVC. Anatomic variations of neck vessels are not uncommon and may increase the complication rate especially in patients with altered coagulation profile. Anatomic landmark technique is commonly used for CVC but not without possibility of complications. Ultrasound (US) guided IJV Cannulation provides high success rate, less access time and lesser complications. Superiority of US over anatomic landmark technique has been established, but use of US in clinical practice is still limited. We report a case of idiopathic unilateral hypoplastic IJV in a patient with altered coagulation profile who required CVC, we also tried to find out the barriers for limited use of US. PMID:26712993

  11. The AO Ulnar Shortening Osteotomy System Indications and Surgical Technique

    PubMed Central

    Nagy, Ladislav; Jungwirth-Weinberger, Anna; Campbell, Douglas; Pino, Juan González del

    2014-01-01

    Ulnar shortening osteotomy is an established and frequently performed surgical procedure in wrist surgery. The technical aspects of the procedure have continued to develop in recent years, with instruments and implants being developed specifically for this purpose. Ulnar shortening osteotomy is required for different clinical indications and situations. These varying indications demand different amounts of shortening, but all must be precise and accurate. Controversy exists as to how this can best be achieved in terms of the location for osteotomy, the surgical approach and geometry of the osteotomy, as well as which implant to use to provide optimal stability. The goal of all techniques (besides successfully resolving the underlying problem) is to achieve reliable and rapid bone union without compromising early functional rehabilitation and also to avoid hardware complications. The AO Hand Expert Group has developed a specialized instrumentation system with dedicated and specifically designed implants to ensure exact and accurate cutting with precise and rigid stabilization of the ulna. The matched drill guides and double-blade saws allow accurate completion of the planned amount of shortening together with precise coaptation of the osteotomy fragments. The specific ulnar osteotomy LCP (locking compression plate) combines maximum stability with minimum bulk and soft tissue irritation. The features of the implant, its surgical technique, and early results are described. PMID:25077046

  12. Percutaneous endoscopic gastrostomy: indications, technique, complications and management.

    PubMed

    Rahnemai-Azar, Ata A; Rahnemaiazar, Amir A; Naghshizadian, Rozhin; Kurtz, Amparo; Farkas, Daniel T

    2014-06-28

    Percutaneous endoscopic gastrostomy (PEG) is the preferred route of feeding and nutritional support in patients with a functional gastrointestinal system who require long-term enteral nutrition. Besides its well-known advantages over parenteral nutrition, PEG offers superior access to the gastrointestinal system over surgical methods. Considering that nowadays PEG tube placement is one of the most common endoscopic procedures performed worldwide, knowing its indications and contraindications is of paramount importance in current medicine. PEG tubes are sometimes placed inappropriately in patients unable to tolerate adequate oral intake because of incorrect and unrealistic understanding of their indications and what they can accomplish. Broadly, the two main indications of PEG tube placement are enteral feeding and stomach decompression. On the other hand, distal enteral obstruction, severe uncorrectable coagulopathy and hemodynamic instability constitute the main absolute contraindications for PEG tube placement in hospitalized patients. Although generally considered to be a safe procedure, there is the potential for both minor and major complications. Awareness of these potential complications, as well as understanding routine aftercare of the catheter, can improve the quality of care for patients with a PEG tube. These complications can generally be classified into three major categories: endoscopic technical difficulties, PEG procedure-related complications and late complications associated with PEG tube use and wound care. In this review we describe a variety of minor and major tube-related complications as well as strategies for their management and avoidance. Different methods of percutaneous PEG tube placement into the stomach have been described in the literature with the "pull" technique being the most common method. In the last section of this review, the reader is presented with a brief discussion of these procedures, techniques and related issues. Despite the mentioned PEG tube placement complications, this procedure has gained worldwide popularity as a safe enteral access for nutrition in patients with a functional gastrointestinal system. PMID:24976711

  13. Percutaneous endoscopic gastrostomy: Indications, technique, complications and management

    PubMed Central

    Rahnemai-Azar, Ata A; Rahnemaiazar, Amir A; Naghshizadian, Rozhin; Kurtz, Amparo; Farkas, Daniel T

    2014-01-01

    Percutaneous endoscopic gastrostomy (PEG) is the preferred route of feeding and nutritional support in patients with a functional gastrointestinal system who require long-term enteral nutrition. Besides its well-known advantages over parenteral nutrition, PEG offers superior access to the gastrointestinal system over surgical methods. Considering that nowadays PEG tube placement is one of the most common endoscopic procedures performed worldwide, knowing its indications and contraindications is of paramount importance in current medicine. PEG tubes are sometimes placed inappropriately in patients unable to tolerate adequate oral intake because of incorrect and unrealistic understanding of their indications and what they can accomplish. Broadly, the two main indications of PEG tube placement are enteral feeding and stomach decompression. On the other hand, distal enteral obstruction, severe uncorrectable coagulopathy and hemodynamic instability constitute the main absolute contraindications for PEG tube placement in hospitalized patients. Although generally considered to be a safe procedure, there is the potential for both minor and major complications. Awareness of these potential complications, as well as understanding routine aftercare of the catheter, can improve the quality of care for patients with a PEG tube. These complications can generally be classified into three major categories: endoscopic technical difficulties, PEG procedure-related complications and late complications associated with PEG tube use and wound care. In this review we describe a variety of minor and major tube-related complications as well as strategies for their management and avoidance. Different methods of percutaneous PEG tube placement into the stomach have been described in the literature with the “pull” technique being the most common method. In the last section of this review, the reader is presented with a brief discussion of these procedures, techniques and related issues. Despite the mentioned PEG tube placement complications, this procedure has gained worldwide popularity as a safe enteral access for nutrition in patients with a functional gastrointestinal system. PMID:24976711

  14. Coil Embolization Treatment in Pulmonary Artery Branch Rupture During Swan-Ganz Catheterization

    SciTech Connect

    Gottwalles, Yannick; Wunschel-Joseph, Marie-Eve; Hanssen, Michel

    2000-11-15

    Rupture of the pulmonary artery or one of its branches during Swan-Ganz catheterization is a complication that is rare but remains fatal in almost 50% of cases. The risk factors and mechanisms involved in the pathogenesis of this accident have been widely reported. Management is twofold: resuscitation procedures and specific medical or even surgical treatment. We report a case of pulmonary artery rupture occurring during Swan-Ganz catheterization that was treated by coil embolization. This technique, which is quick and simple to use, would appear to be very promising. This is the first case of successful emergency treatment of pulmonary artery rupture using an endovascular technique.

  15. Clean Intermittent Catheterization in the School Setting

    ERIC Educational Resources Information Center

    Katrancha, Elizabeth D.

    2008-01-01

    Spina bifida (SB) is a neural tube defect that causes many physical and mental disabilities. Bowel and bladder incontinence is the disability seen most often in these students that requires the school nurse's attention. Clean intermittent catheterization (CIC) provides the student with SB a vehicle to reach a satisfactory level of continence,…

  16. La réparation sphinctérienne directe: points techniques, indications et résultats

    PubMed Central

    Laalim, Said Ait; Hrora, Abdelmalek; Raiss, Mohammed; Ibnmejdoub, Karim; Toughai, Imane; Ahallat, Mohammed; Mazaz, Khalid

    2013-01-01

    L'incontinence anale est un handicap physique, psychique et social majeur qui a de nombreuses causes différentes. Les méthodes actuellement disponibles pour améliorer les symptômes de cette incontinence sont les méthodes médicales et de rééducation d'une part et les méthodes chirurgicales d'autre part. Quatre techniques chirurgicales répondent à ces objectifs pour la plupart des malades: la sphinctérorraphie, la neuromodulation des racines sacrées, et les deux techniques de substitution que sont le sphincter artificiel et la graciloplastie dynamisée. La réparation sphinctérienne directe est la technique la plus utilisée dans le traitement chirurgical de l'incontinence anale (IA) par lésion sphinctérienne. Cette technique est envisageable chez les malades ayant une incontinence fécale en rapport avec des lésions limitées du sphincter anal externe. La technique chirurgicale est simple (myorraphie par suture directe ou en paletot) et bien codifiée. Les résultats fonctionnels sont imparfaits et se dégradent avec la durée du suivi. Une continence parfaite après réparation sphinctérienne est rarement acquise de façon durable: le malade candidat à cette approche thérapeutique doit en être averti. PMID:23504542

  17. Laparoscopic pyeloplasty. Indications, technique, and long-term outcome.

    PubMed

    Chen, R N; Moore, R G; Kavoussi, L R

    1998-05-01

    Laparoscopic pyeloplasty is one of several minimally invasive treatment options for UPJ obstruction. In fact, several endoscopically and fluoroscopically controlled methods of incising the obstructed UPJ are now available that are significantly less invasive and less morbid in comparison with open pyeloplasty. However, the long-term success rates of these incisional techniques are less than the rates reported for open pyeloplasty. Several causes of obstruction may be present in the primarily obstructed UPJ, including kinking or compression related to crossing vessels or intrinsic narrowing at the UPJ. One potential reason for the inferior success rates of incisional methods in comparison with open pyeloplasty is that the former techniques address the intrinsically narrowed UPJ but may not address extrinsic problems such as kinking of the ureter associated with fibrotic bands or compression from crossing vessels. Laparoscopic pyeloplasty addresses all potential causes of obstruction. Any fibrotic bands kinking the ureter are divided, and the ureter is spatulated through the level of the UPJ prior to completion of the anastomosis. If a crossing vessel is encountered, a dismembered pyeloplasty is performed, the ureter and renal pelvis are transposed to the opposite side of the vessels, and the anastomosis is completed. An additional disadvantage of incisional techniques is the significant risk of hemorrhage following incision of the UPJ, with as many as 3% to 11% of patients requiring blood transfusion. Hemorrhage may occur owing to an errant anterior incision, the presence of a crossing vessel, incision into the renal parenchyma adjacent to the UPJ, or as the result of bleeding from the percutaneous access site. In contrast, mean estimated blood loss in the authors' series of 57 laparoscopic pyeloplasties was 139 mL, and none of the patients required blood transfusion. Although it is more morbid in comparison with retrograde or fluoroscopically controlled endopyelotomy, laparoscopic pyeloplasty seems at least comparable to antegrade percutaneous endopyelotomy in terms of the length of hospitalization and patient convalescence. Laparoscopic pyeloplasty, however, offers a higher success rate than with incisional techniques, not only from a radiographic standpoint but from a subjective standpoint as determined by the results of the analogue pain and activity questionnaire. The major disadvantage of laparoscopic pyeloplasty is the need for proficiency in laparoscopic techniques and for a longer operative time. As a result, the literature on laparoscopic pyeloplasty consists primarily of small series. Janetschek and co-workers reported on a series of 17 patients who underwent laparoscopic pyeloplasty, including 14 via a transperitoneal approach and 3 via a retroperitoneal approach. Procedures performed included ureterolysis alone, dismembered pyeloplasty, and nondismembered (Fenger) pyeloplasty. "Fenger-plasty" is similar to Y-V pyeloplasty and is performed by incising the UPJ longitudinally and closing the incision transversely in a Heineke-Mikulicz fashion. Janetschek and colleagues reported a 100% success in the eight patients who underwent dismembered pyeloplasty but believed that this technique was too cumbersome and should be reserved for patients with long stenoses, dorsally crossing vessels, or large renal pelvis. Because two of the four patients undergoing ureterolysis alone failed treatment, Janetschek and colleagues have abandoned this technique. They now prefer the Fenger-plasty technique, even in the setting of ventrally crossing vessels, because the technique can be performed quickly with one to three sutures, and the anastomosis can be sealed with fibrin glue and a flap of Gerota's fascia. Their experience with this technique, however, remains relatively limited. Technologic advances such as the Endostitch device have facilitated reconstructive laparoscopic procedures such as pyeloplasty. (ABSTRACT TRUNCATED) PMID:9633588

  18. Venous Access Ports: Indications, Implantation Technique, Follow-Up, and Complications

    SciTech Connect

    Walser, Eric M.

    2012-08-15

    The subcutaneous venous access device (SVAD or 'port') is a critical component in the care of patients with chronic disease. The modern SVAD provides reliable access for blood withdrawal and medication administration with minimal disruption to a patient's lifestyle. Because of improved materials and catheter technology, today's ports are lighter and stronger and capable of high-pressure injections of contrast for cross-sectional imaging. The majority of SVAD placement occurs in interventional radiology departments due to their ability to provide this service at lower costs, lower, complication rates, and greater volumes. Port-insertion techniques vary depending on the operator, but all consist of catheter placement in the central venous circulation followed by subcutaneous pocket creation and port attachment to the catheter with fixation and closure of the pocket. Venous access challenges occasionally occur in patients with central vein occlusions, necessitating catheterization of collateral veins or port placement in alternate locations. Complications of SVADs include those associated with the procedure as well as short- (<30 days) and long-term problems. Procedural and early complications are quite rare due to the near-universal use of real-time ultrasound guidance for vein puncture, but they can include hematoma, catheter malposition, arrhythmias, and pneumothorax. Late problems include both thrombotic complications (native venous or port-catheter thrombosis) and infections (tunnel or pocket infections or catheter-associated bloodstream infections). Most guidelines suggest that 0.3 infections/1000 catheter days is an appropriate upper threshold for the insertion of SVADs.

  19. Incisal edge reattachment: indications for use and clinical technique.

    PubMed

    Murchison, D F; Burke, F J; Worthington, R B

    1999-06-26

    This article presents an overview of the evolution of the incisal edge reattachment procedure. Case reports are described of patients presenting with traumatised teeth in which the reattachment procedure was performed. A review is provided of present in vivo studies detailing long-term success rates in the clinical application of this procedure. Finally, a recommended technique for diagnosis and treatment is offered to improve success in this procedure which may benefit a significant segment of the paediatric and adolescent populations. PMID:10425806

  20. Frontofacial Surgery in Children and Adolescents: Techniques, Indications, Outcomes

    PubMed Central

    Britto, J.A.; Greig, A.; Abela, C.; Hearst, D.; Dunaway, D.J.; Evans, R.D.

    2014-01-01

    The techniques of frontofacial surgery are most valuable in the clinical management of complex craniofacial deformity to achieve a range of functional and aesthetic gains in children from infancy to maturity. A variety of complex craniofacial osteotomies that can be used to separate the orbits from the skull base have been described. In addition, the combination of circumorbital release and pterygomaxillary disjunction allows advancement of the orbitomaxillary segment for powerful clinical benefit. For the purpose of this article, the principal frontofacial strategies include the monobloc frontofacial advancement by distraction (MBD), frontofacial bipartition advancement by distraction (BpD), orbital box osteotomy (FFBx), and frontofacial bipartition (FFBp). These techniques are broadly used for two purposes: to allow for the translocation of one or both orbits to correct orbitofacial disproportion (hypertelorism, vertical orbital dystopia, or a combination of both), or to advance the orbitomaxillary segment for orbital volume expansion and protection of the eye in syndromes featuring severe exorbitism (oculo-orbital disproportion). Here we describe aspects of our experience of frontofacial surgery in the Craniofacial Centre at Great Ormond Street Hospital for Children, London, with reference to the principles underpinning frontofacial surgical techniques, their challenges, and their impact on function and aesthetics. PMID:25210505

  1. Frontofacial surgery in children and adolescents: techniques, indications, outcomes.

    PubMed

    Britto, J A; Greig, A; Abela, C; Hearst, D; Dunaway, D J; Evans, R D

    2014-08-01

    The techniques of frontofacial surgery are most valuable in the clinical management of complex craniofacial deformity to achieve a range of functional and aesthetic gains in children from infancy to maturity. A variety of complex craniofacial osteotomies that can be used to separate the orbits from the skull base have been described. In addition, the combination of circumorbital release and pterygomaxillary disjunction allows advancement of the orbitomaxillary segment for powerful clinical benefit. For the purpose of this article, the principal frontofacial strategies include the monobloc frontofacial advancement by distraction (MBD), frontofacial bipartition advancement by distraction (BpD), orbital box osteotomy (FFBx), and frontofacial bipartition (FFBp). These techniques are broadly used for two purposes: to allow for the translocation of one or both orbits to correct orbitofacial disproportion (hypertelorism, vertical orbital dystopia, or a combination of both), or to advance the orbitomaxillary segment for orbital volume expansion and protection of the eye in syndromes featuring severe exorbitism (oculo-orbital disproportion). Here we describe aspects of our experience of frontofacial surgery in the Craniofacial Centre at Great Ormond Street Hospital for Children, London, with reference to the principles underpinning frontofacial surgical techniques, their challenges, and their impact on function and aesthetics. PMID:25210505

  2. Myocardial blood flow: Roentgen videodensitometry techniques

    NASA Technical Reports Server (NTRS)

    Smith, H. C.; Robb, R. A.; Wood, E. H.

    1975-01-01

    The current status of roentgen videodensitometric techniques that provide an objective assessment of blood flow at selected sites within the coronary circulation were described. Roentgen videodensitometry employs conventional radiopaque indicators, radiological equipment and coronary angiographic techniques. Roentgen videodensitometry techniques developed in the laboratory during the past nine years, and for the past three years were applied to analysis of angiograms in the clinical cardiac catheterization laboratory.

  3. Patellofemoral Dysfunction in Sports Trochleoplasty: Indications and Techniques.

    PubMed

    Ryzek, Don-Felix; Schöttle, Philip

    2015-08-01

    Patellofemoral instability (PFI) is a pathological knee syndrome that frequently affects young patients. The patellofemoral joint's structural morphology is the determining factor in the extent of PFI. Structural factors that play leading roles in patellofemoral stability can be classified into static (bone morphology), passive (ligamentous), and active (muscular). The predominant static factor leading to patella dislocation and thus patellofemoral dysfunction is trochlear dysplasia, which we focus on in this review. After orienting clinical examinations, MRI can provide the best information about trochlear dysplasia. This includes trochlear shape, orientation, and tibial tuberosity to trochlear groove distance. In convex trochleas or trochlea dysplasia with PFI at flexion over 30 degrees, we recommend performing a deepening trochleoplasty to correct for static pathomorphology. In this review, we will focus on the pathology of trochlea dysplasia, its role in PFI, the correct indication for trochleoplasty as a primary intervention, and the role of a simultaneous medial patellofemoral ligament reconstruction. PMID:25581230

  4. The Indications, Surgical Techniques, and Limitations of Laparoscopic Myomectomy

    PubMed Central

    Kuwatsuru, Ryohei

    2003-01-01

    Objective: To assess the indications and limits of laparoscopic myomectomies (LM). Methods: We conducted a retrospective analysis of 89 consecutive cases of LM. Our LM procedures were as follows: Diluted vasopressin was injected into the myoma capsule, and a transverse incision was made by fine monopolar electrode. Traction was applied to the myoma with a myoma screw. The uterine wall was sutured with a curved needle. Fibrin glue spray was applied to prevent adhesion formation. Enucleated myomas were removed via trocar by using an electric morcellator. Results: We enucleated 195 nodules with diameters > 2 cm; the mean size of the dominant myomas was 5.3 cm. The mean number of myomas removed from each patient was 2. The uterine wall was sutured in all cases with a mean of 9 sutures. The mean blood loss was 102 mL, and the mean operating time was 111 minutes. No patients were converted to laparotomy. The average hospital stay was 2.4 days. When the myomas were larger than 10 cm, the blood loss and operating time were increased. However, the number of myomas did not correlate with blood loss. Conclusion: LM appears to offer a number of advantages if the myoma is not larger than 10 cm. PMID:12856836

  5. 21 CFR 870.1310 - Vessel dilator for percutaneous catheterization.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ...FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH AND HUMAN SERVICES (CONTINUED) MEDICAL DEVICES CARDIOVASCULAR DEVICES Cardiovascular Diagnostic Devices § 870.1310 Vessel dilator for percutaneous catheterization. (a)...

  6. Catheterization of the urethra in female pigs.

    PubMed

    Musk, G C; Zwierzchoniewska, M; He, B

    2015-10-01

    Female pigs are commonly utilized as an animal model for biomedical research and require urethral catheterization. Sixteen pigs were anaesthetized for research purposes and required the placement of a urethral catheter. Post-mortem examination of the vaginas revealed the urethral opening to be consistently halfway from the mucocutaneous junction of the vulva to the cervix. A shallow diverticulum was also observed on the ventral floor of the urethral opening. To optimize conditions for success the pig should be carefully positioned supine, a vaginal speculum and light source should be used, the pig should be adequately anaesthetized, and the anatomy of the vagina should be reviewed. PMID:25977261

  7. Qureshi-5 Catheter for Complex Supra- and Abdominal-Aortic Catheterization

    PubMed Central

    Qureshi, Adnan I.; Xiao, WeiGang; Liu, HongLiang

    2015-01-01

    Background The use of previously described catheter technique was expanded to complex supra- and abdominal- aortic catheterizations. Methods A new (Qureshi 5) catheter with curved shape at the distal end that has two lumens was used. One of lumens can accommodate a 0.035-inch guide wire and the second lumen can accommodate a 0.018-inch guide wire and terminates at the beginning of the distal curve of the first lumen. The manipulation and engagement of the curved distal end catheter was facilitated by rotation and movement of the J-shaped 0.018-inch guide wire extended coaxial and beyond the distal end of catheter. Subsequently, either contrast was injected or a 0.035-inch guide wire advanced into the target artery. Results The catheters were used in one patient to perform diagnostic cerebral and abdominal angiography through a 6F introducer sheath placed in the right common femoral artery. The catheterization was complex because of severe tortuosity of arch and descending aorta secondary to kyphosis. The left and right internal carotid arteries and left and right vertebral arteries, left renal artery, and superior mesenteric artery were catheterized in patient (fluoroscopy time 19:46 min). No complications were observed in the patient. Conclusions The Qureshi-5 catheter was successful in complex supra- and abdominal-aortic catheterizations.

  8. Development of a charge adjustment model for cardiac catheterization.

    PubMed

    Brennan, Andrew; Gauvreau, Kimberlee; Connor, Jean; O'Connell, Cheryl; David, Sthuthi; Almodovar, Melvin; DiNardo, James; Banka, Puja; Mayer, John E; Marshall, Audrey C; Bergersen, Lisa

    2015-02-01

    A methodology that would allow for comparison of charges across institutions has not been developed for catheterization in congenital heart disease. A single institution catheterization database with prospectively collected case characteristics was linked to hospital charges related and limited to an episode of care in the catheterization laboratory for fiscal years 2008-2010. Catheterization charge categories (CCC) were developed to group types of catheterization procedures using a combination of empiric data and expert consensus. A multivariable model with outcome charges was created using CCC and additional patient and procedural characteristics. In 3 fiscal years, 3,839 cases were available for analysis. Forty catheterization procedure types were categorized into 7 CCC yielding a grouper variable with an R (2) explanatory value of 72.6%. In the final CCC, the largest proportion of cases was in CCC 2 (34%), which included diagnostic cases without intervention. Biopsy cases were isolated in CCC 1 (12%), and percutaneous pulmonary valve placement alone made up CCC 7 (2%). The final model included CCC, number of interventions, and cardiac diagnosis (R (2) = 74.2%). Additionally, current financial metrics such as APR-DRG severity of illness and case mix index demonstrated a lack of correlation with CCC. We have developed a catheterization procedure type financial grouper that accounts for the diverse case population encountered in catheterization for congenital heart disease. CCC and our multivariable model could be used to understand financial characteristics of a population at a single point in time, longitudinally, and to compare populations. PMID:25113520

  9. A new simple method of converting a retrograde femoral access to an antegrade catheterization.

    PubMed

    Ysa, August; Lobato, Marta; Gómez, Roberto; Arruabarrena, Amaia; Metcalfe, Matthew; Fonseca, Juan L

    2014-09-01

    Antegrade puncture is a routinely used technique of obtaining access to the common femoral artery to perform infrainguinal interventions. However, antegrade arterial access can be challenging in the presence of hostile, scarred groins, obesity, or a high common femoral artery bifurcation. A simple method of converting a retrograde femoral access to an antegrade catheterization using an inexpensive and universally available monofilament suture is presented. PMID:24797552

  10. Use of structured personality survey techniques to indicate operator response to stressful situations

    SciTech Connect

    Waller, M.A.

    1990-01-01

    Under given circumstances, a person will tend to operate in one of four dominant orientations: (1) to perform tasks; (2) to achieve consensus; (3) to achieve understanding, or (4) to maintain structure. Historically, personality survey techniques, such as the Myers-Briggs type indicator, have been used to determine these tendencies. While these techniques can accurately reflect a person's orientation under normal social situations, under different sets of conditions, the same person may exhibit other tendencies, displaying a similar or entirely different orientation. While most do not exhibit extreme tendencies or changes of orientation, the shift in personality from normal to stressful conditions can be rather dramatic, depending on the individual. Structured personality survey techniques have been used to indicate operator response to stressful situations. These techniques have been extended to indicate the balance between orientations that the control room team has through the various levels of cognizance.

  11. Superciliary Keyhole Approach for Unruptured Anterior Circulation Aneurysms: Surgical Technique, Indications, and Contraindications

    PubMed Central

    2014-01-01

    Neurosurgeons have been trying to reduce surgical invasiveness by applying minimally invasive keyhole approaches. Therefore, this paper clarifies the detailed surgical technique, its limitations, proper indications, and contraindications for a superciliary keyhole approach as a minimally invasive modification of a pterional approach. Successful superciliary keyhole surgery for unruptured aneurysms requires an understanding of the limitations and the use of special surgical techniques. Essentially, this means the effective selection of surgical indications, usage of the appropriate surgical instruments with a tubular shaft, and refined surgical techniques, including straightforward access to the aneurysm, clean surgical dissection, and the application of clips with an appropriate configuration. A superciliary keyhole approach allows unruptured anterior circulation aneurysms to be clipped safely, rapidly, and less invasively on the basis of appropriate surgical indications. PMID:25535512

  12. Compliance With Guideline Statements for Urethral Catheterization in an Iranian Teaching Hospital

    PubMed Central

    Taleschian-Tabrizi, Negar; Farhadi, Fereshteh; Madani, Neda; Mokhtarkhani, Mohaddeseh; Kolahdouzan, Kasra; Hajebrahimi, Sakineh

    2015-01-01

    Background: It is believed that healthcare staff play an important role in minimizing complications related to urethral catheterization. The purpose of this study was to determine whether or not healthcare staff complied with the standards for urethral catheterization. Methods: This study was conducted in Imam Reza teaching hospital, Tabriz, Iran, from July to September 2013. A total of 109 catheterized patients were selected randomly from surgical and medical wards and intensive care units (ICUs). A questionnaire was completed by healthcare staff for each patient to assess quality of care provided for catheter insertion, while catheter in situ, draining and changing catheter bags. Items of the questionnaire were obtained from guidelines for the prevention of infection. Data analysis was performed with SPSS 16. Results: The mean age of the patients was 50.54 ± 22.13. Of the 109 patients, 56.88% were admitted to ICUs. The mean duration of catheter use was 15.86 days. Among the 25 patients who had a urinalysis test documented in their hospital records, 11 were positive for urinary tract infection (UTI). The lowest rate of hand-washing was reported before bag drainage (49.52%). The closed drainage catheter system was not available at all. Among the cases who had a daily genital area cleansing, in 27.63% cases, the patients or their family members performed the washing. In 66.35% of cases, multiple-use lubricant gel was applied; single-use gel was not available. The rate of documentation for bag change was 79%. Conclusion: The majority of the guideline statements was adhered to; however, some essential issues, such as hand hygiene were neglected. And some patients were catheterized routinely without proper indication. Limiting catheter use to mandatory situations and encouraging compliance with guidelines are recommended. PMID:26673464

  13. Development of Needle Insertion Manipulator for Central Venous Catheterization

    NASA Astrophysics Data System (ADS)

    Kobayashi, Yo; Hong, Jaesung; Hamano, Ryutaro; Hashizume, Makoto; Okada, Kaoru; Fujie, Masakatsu G.

    Central venous catheterization is a procedure, which a doctor insert a catheter into the patient’s vein for transfusion. Since there are risks of bleeding from arterial puncture or pneumothorax from pleural puncture. Physicians are strictly required to make needle reach up into the vein and to stop the needle in the middle of vein. We proposed a robot system for assisting the venous puncture, which can relieve the difficulties in conventional procedure, and the risks of complication. This paper reports the design structuring and experimental results of needle insertion manipulator. First, we investigated the relationship between insertion force and angle into the vein. The results indicated that the judgment of perforation using the reaction force is possible in case where the needling angle is from 10 to 20 degree. The experiment to evaluate accuracy of the robot also revealed that it has beyond 0.5 mm accuracy. We also evaluated the positioning accuracy in the ultrasound images. The results displays that the accuracy is beyond 1.0 mm and it has enough for venous puncture. We also carried out the venous puncture experiment to the phantom and confirm our manipulator realized to make needle reach up into the vein.

  14. Indwelling Catheterization in Caesarean Section: Time To Retire It!

    PubMed Central

    Mehta, Sumita; Grover, Anshul; Goel, Neerja

    2015-01-01

    Background Routine placement of indwelling catheter preoperatively in Caesarean Section is being practiced without justified scientific evidence. Aim To evaluate the effect of routine indwelling catheterization on the postoperative ambulation, morbidity and hospital stay in women undergoing Caesarean section. Settings and Design Case-Control study carried in a tertiary teaching hospital. Materials and Methods This study was carried over 150 women undergoing primary Caesarean section without any medical complication or pre-existing Urinary Tract Infections (UTI). The subjects were randomly allocated to 2 groups i.e. Group 1(Non-Catheterized; NC) and Group 2 (Catheterized for 24 hours postoperatively; C). Parameters noted were; duration of surgery, time of ambulation, postoperative voiding discomfort {graded as - no, mild, moderate-severe, by Visual Analog Scoring (VAS)}, incidence of UTI, postoperative urinary retention, need of postoperative antibiotics and duration of hospital stay. Statistical Analysis Results were analysed using unpaired t-test. Results There was no significant difference in duration of surgery and postoperative urinary retention in both groups. However, it was seen that non-catheterized patients had significantly earlier ambulation, shorter hospital stay, took less time for first voiding, lesser voiding discomfort, less incidence of UTI and lesser use of postoperative antibiotics. Conclusion The routine use of indwelling catheter in Caesarean section is unscientific and unnecessary. There should be selective rather than routine catheterization. PMID:26500959

  15. Assessment of a Novel Hybrid Delphi and Nominal Groups Technique to Evaluate Quality Indicators

    PubMed Central

    Davies, Sheryl; Romano, Patrick S; Schmidt, Eric M; Schultz, Ellen; Geppert, Jeffrey J; McDonald, Kathryn M

    2011-01-01

    Objective To test the implementation of a novel structured panel process in the evaluation of quality indicators. Data Source National panel of 64 clinicians rating usefulness of indicator applications in 2008–2009. Study Design Hybrid panel combined Delphi Group and Nominal Group (NG) techniques to evaluate 81 indicator applications. Principal Findings The Delphi Group and NG rated 56 percent of indicator applications similarly. Group assignment (Delphi versus Nominal) was not significantly associated with mean ratings, but specialty and research interests of panelists, and indicator factors such as denominator level and proposed use were. Rating distributions narrowed significantly in 20.8 percent of applications between review rounds. Conclusions The hybrid panel process facilitated information exchange and tightened rating distributions. Future assessments of this method might include a control panel. PMID:21790589

  16. Endovascular Aortic Aneurysm Repair with Chimney and Snorkel Grafts: Indications, Techniques and Results

    SciTech Connect

    Patel, Rakesh P.; Katsargyris, Athanasios Verhoeven, Eric L. G.; Adam, Donald J.; Hardman, John A.

    2013-12-15

    The chimney technique in endovascular aortic aneurysm repair (Ch-EVAR) involves placement of a stent or stent-graft parallel to the main aortic stent-graft to extend the proximal or distal sealing zone while maintaining side branch patency. Ch-EVAR can facilitate endovascular repair of juxtarenal and aortic arch pathology using available standard aortic stent-grafts, therefore, eliminating the manufacturing delays required for customised fenestrated and branched stent-grafts. Several case series have demonstrated the feasibility of Ch-EVAR both in acute and elective cases with good early results. This review discusses indications, technique, and the current available clinical data on Ch-EVAR.

  17. Combined Hip Arthroscopy and Periacetabular Osteotomy: Indications, Advantages, Technique, and Complications

    PubMed Central

    Domb, Benjamin; LaReau, Justin; Redmond, John M.

    2014-01-01

    Evaluation and treatment of concomitant intra-articular pathology may be beneficial before periacetabular osteotomy (PAO) is performed. Hip arthroscopy before PAO allows the surgeon to perform full inspection of the hip joint and can be used to treat hip pathology before osteotomy. The indications for hip arthroscopy before PAO are presented in this article. The combined surgical procedure is described, along with potential complications. The advantages and disadvantages of this technique are outlined. PMID:24843847

  18. Pelvic Fixation in Adult and Pediatric Spine Surgery: Historical Perspective, Indications, and Techniques: AAOS Exhibit Selection.

    PubMed

    Jain, Amit; Hassanzadeh, Hamid; Strike, Sophia A; Menga, Emmanuel N; Sponseller, Paul D; Kebaish, Khaled M

    2015-09-16

    Achieving solid osseous fusion across the lumbosacral junction has historically been, and continues to be, a challenge in spine surgery. Robust pelvic fixation plays an integral role in achieving this goal. The goals of this review are to describe the history of and indications for spinopelvic fixation, examine conventional spinopelvic fixation techniques, and review the newer S2-alar-iliac technique and its outcomes in adult and pediatric patients with spinal deformity. Since the introduction of Harrington rods in the 1960s, spinal instrumentation has evolved substantially. Indications for spinopelvic fixation as a means to achieve lumbosacral arthrodesis include a long arthrodesis (five or more vertebral levels) or use of three-column osteotomies in the lower thoracic or lumbar spine, surgical treatment of high-grade spondylolisthesis, and correction of lumbar deformity and pelvic obliquity. A variety of techniques have been described over the years, including Galveston iliac rods, Jackson intrasacral rods, the Kostuik transiliac bar, iliac screws, and S2-alar-iliac screws. Modern iliac screws and S2-alar-iliac screws are associated with relatively low rates of pseudarthrosis. S2-alar-iliac screws have the advantages of less implant prominence and inline placement with proximal spinal anchors. Collectively, these techniques provide powerful methods for obtaining control of the pelvis in facilitating lumbosacral arthrodesis. PMID:26378268

  19. Teaching Self-Catheterization Skills to a Child with Myelomeningocele in a Preschool Setting.

    ERIC Educational Resources Information Center

    Robertson, Jo; And Others

    1992-01-01

    Simulation training and a prompt hierarchy were found to facilitate acquisition of clean intermittent self-catheterization skills by a four-year-old male with myelomeningocele. The child was first taught to perform catheterization on a doll, then on himself. Skills were clustered into three tasks of diapering, cleansing, and catheterization.…

  20. Diagnostic aspiration of an iatrogenic hydrothorax following subclavian catheterization.

    PubMed Central

    Steiger, M. J.; Morgan, A. G.

    1990-01-01

    Central venous catheterization is not without hazard. Inadvertent placement in the pleural space can occur without the development of a pneumothorax and pressure measurements may appear misleadingly normal. This case report illustrates an effective method of diagnosing and draining an iatrogenic hydrothorax which resulted in this way. Images Figure 1 Figure 2 PMID:2217040

  1. A Review of Voltage Stability Assessment Techniques with an Improved Voltage Stability Indicator

    NASA Astrophysics Data System (ADS)

    Danish, Mir Sayed Shah; Yona, Atsushi; Senjyu, Tomonobu

    2015-04-01

    A blackout can take place in entire power system or a part of the system due to extreme voltage instability (voltage collapse) that can appear abruptly. Instability prediction and continuous monitoring of the power system performance is, therefore, known exigent. This paper is conducted with a broad overview of the voltage stability indices, which are previously studied in the literature, and have the same foundation during their formulation. Afterward, an improved voltage stability indicator is introduced as a result of the multi-criteria integration and enhancement of the original indices by employing linear algebra methods. It is found that the proposed algorithm can overcome on the probable limitations from calculating point view. Then comparative analysis of the indices is presented in order to reach a unique consensus about the typical techniques of modal analysis (sensitivity, eigenvalue, right eigenvectors, and bus participation factor) as a precise algorithm. Finally, the IEEE 14-bus, and 30-bus test systems are selected to verify the algorithm, and compare the performance of the improved indicator approach with the existing indices.

  2. The Kapandji-Sauvé operation. Its techniques and indications in non rheumatoid diseases.

    PubMed

    Kapandji, I A

    1986-01-01

    The Kapandji-Sauvé operation consists in the arthrodesis of the distal radioulnar joint surmounted with a segmentary resection of the lower ulna. This technique may be used not only in rheumatoid dislocations of the distal radioulnar joint instead of the resection of the distal end of the ulna (Moore-Darrach) but also in traumatic diseases such as dislocations, sprains, chronical instabilities of this joint and stiffness secondary to Colles fractures. Two techniques are described, following the original one proposed in 1936. The first one (Technique I) indicated to chronical instabilities secondary to sprains and distal radioulnar dislocations. In this case, the ulnar head is in right situation at the sigmoid notch level and may be blocked at this place with two screws in mid position of prono-supination. The gap between the two extremities of the ulna must be filled by the pronator quadratus to avoid bony reconstruction. The second one (Technique II) is especially designed for the limitations of the prono-supination motion after Colles fractures, with shortening of the radius which causes an incongruency of the distal radioulnar joint and a positive ulnar variance. In this case it is necessary to lift up the ulnar head before blocking it in the sigmoid notch. A proceeding doing this automatically is described. Technique I was used in three cases and Technique II in four. In all cases the range of the prono-supination motion was normal in three to six weeks. The pains disappeared except a slight one when holding a load in supination position and when resting the hand unsteadily. The stability of the wrist was recovered allowing to unwind screw caps and to turn door knobs. PMID:3813693

  3. Medicolegal characteristics of cardiac catheterization litigation in the United States, 1985 to 2009.

    PubMed

    Kim, Candice; Vidovich, Mladen I

    2013-11-15

    There are few assessments of patterns of medicolegal cases involving cardiac catheterizations. This descriptive study reviews the patterns of liability and medical outcomes involving cardiac catheterization litigation from the LexisNexis Academic database and the Physician Insurers Association of America registry. From 1985 to 2009, the Physician Insurers Association of America registry documented 1,361 closed coronary angiography claims. The cardiovascular disease specialty was involved in 699 with other specialties involved in the remaining cases. Of the 1,361 closed claims, 301 (22%) resulted in payments to the plaintiff (average indemnity of $230,987). The most common alleged error was for improper performance (35.4%; average indemnity of $255,542). The alleged error with the highest average indemnity of $270,916 was errors in diagnosis. Not performing an indicated procedure had the highest ratio of paid to closed claims (41%) with an average indemnity of $246,988. In regard to the severity of injury, death was the most common outcome (44%). The highest ratio of paid to total closed claims (43%) was for grave injuries (highest average indemnity of $555,625). Of the 116 LexisNexis cases, litigation against physicians occurred in 90.5% of cases with judgments in favor of the patients in 29.5%. When death was the outcome (31% of cases), physicians were highly likely to be sued (97%) and the judgment was more likely in the plaintiffs' favor (44%). In conclusion, in litigation related to cardiac catheterizations, most cases are due to medical malpractice and physicians are sued in a high percentage of cases. Cardiologists should recognize these patterns of litigation as these may impact and improve processes of care. PMID:24012022

  4. Preoperative portal vein embolization in liver cancer: indications, techniques and outcomes.

    PubMed

    Loffroy, Romaric; Favelier, Sylvain; Chevallier, Olivier; Estivalet, Louis; Genson, Pierre-Yves; Pottecher, Pierre; Gehin, Sophie; Krausé, Denis; Cercueil, Jean-Pierre

    2015-10-01

    Postoperative liver failure is a severe complication of major hepatectomies, in particular in patients with a chronic underlying liver disease. Portal vein embolization (PVE) is an approach that is gaining increasing acceptance in the preoperative treatment of selected patients prior to major hepatic resection. Induction of selective hypertrophy of the non-diseased portion of the liver with PVE in patients with either primary or secondary hepatobiliary, malignancy with small estimated future liver remnants (FLR) may result in fewer complications and shorter hospital stays following resection. Additionally, PVE performed in patients initially considered unsuitable for resection due to lack of sufficient remaining normal parenchyma may add to the pool of candidates for surgical treatment. A thorough knowledge of hepatic segmentation and portal venous anatomy is essential before performing PVE. In addition, the indications and contraindications for PVE, the methods for assessing hepatic lobar hypertrophy, the means of determining optimal timing of resection, and the possible complications of PVE need to be fully understood before undertaking the procedure. Technique may vary among operators, but cyanoacrylate glue seems to be the best embolic agent with the highest expected rate of liver regeneration for PVE. The procedure is usually indicated when the remnant liver accounts for less than 25-40% of the total liver volume. Compensatory hypertrophy of the non-embolized segments is maximal during the first 2 weeks and persists, although to a lesser extent during approximately 6 weeks. Liver resection is performed 2 to 6 weeks after embolization. The goal of this article is to discuss the rationale, indications, techniques and outcomes of PVE before major hepatectomy. PMID:26682142

  5. Preoperative portal vein embolization in liver cancer: indications, techniques and outcomes

    PubMed Central

    Favelier, Sylvain; Chevallier, Olivier; Estivalet, Louis; Genson, Pierre-Yves; Pottecher, Pierre; Gehin, Sophie; Krausé, Denis; Cercueil, Jean-Pierre

    2015-01-01

    Postoperative liver failure is a severe complication of major hepatectomies, in particular in patients with a chronic underlying liver disease. Portal vein embolization (PVE) is an approach that is gaining increasing acceptance in the preoperative treatment of selected patients prior to major hepatic resection. Induction of selective hypertrophy of the non-diseased portion of the liver with PVE in patients with either primary or secondary hepatobiliary, malignancy with small estimated future liver remnants (FLR) may result in fewer complications and shorter hospital stays following resection. Additionally, PVE performed in patients initially considered unsuitable for resection due to lack of sufficient remaining normal parenchyma may add to the pool of candidates for surgical treatment. A thorough knowledge of hepatic segmentation and portal venous anatomy is essential before performing PVE. In addition, the indications and contraindications for PVE, the methods for assessing hepatic lobar hypertrophy, the means of determining optimal timing of resection, and the possible complications of PVE need to be fully understood before undertaking the procedure. Technique may vary among operators, but cyanoacrylate glue seems to be the best embolic agent with the highest expected rate of liver regeneration for PVE. The procedure is usually indicated when the remnant liver accounts for less than 25-40% of the total liver volume. Compensatory hypertrophy of the non-embolized segments is maximal during the first 2 weeks and persists, although to a lesser extent during approximately 6 weeks. Liver resection is performed 2 to 6 weeks after embolization. The goal of this article is to discuss the rationale, indications, techniques and outcomes of PVE before major hepatectomy. PMID:26682142

  6. Can echocardiographic evaluation of cardiopulmonary hemodynamics decrease right heart catheterizations in end-stage heart failure patients awaiting transplantation?

    PubMed

    Kuppahally, Suman S; Michaels, Andrew D; Tandar, Anwar; Gilbert, Edward M; Litwin, Sheldon E; Bader, Feras M

    2010-12-01

    Candidacy for heart transplantation is influenced by the severity of pulmonary hypertension. In this study, invasive hemodynamics from right-sided cardiac catheterization were compared with values obtained by validated equations from Doppler 2-dimensional transthoracic echocardiography. This prospective study was conducted in 40 patients with end-stage heart failure evaluated for heart transplantation or ventricular assist device implantation. Transthoracic echocardiography and right-sided cardiac catheterization were performed within 4 hours. From continuous-wave Doppler of the tricuspid regurgitation jet, pulmonary artery systolic pressure was calculated as the peak gradient across the tricuspid valve plus right atrial pressure estimated from inferior vena cava filling. Mean pulmonary artery pressure was calculated as (0.61 × pulmonary artery systolic pressure) + 2. Pulmonary vascular resistance (PVR) was calculated as (tricuspid regurgitation velocity/right ventricular outflow tract time-velocity integral × 10) + 0.16. Pulmonary capillary wedge pressure was calculated as 1.91 + (1.24 × E/E'). Pearson's correlation and Bland-Altman analysis of mean differences between echocardiographic and right-sided cardiac catheterization measurements were statistically significant for all hemodynamic parameters (pulmonary artery systolic pressure: r = 0.82, p < 0.05, mean difference 3.1 mm Hg, 95% confidence interval [CI] -0.2 to 6.3; mean pulmonary artery pressure: r = 0.80, p < 0.05, mean difference 2.5 mm Hg, 95% CI 0.3 to 4.6; PVR: r = 0.52, p < 0.05, mean difference 0.8 Wood units, 95% CI 0.3 to 1.4; pulmonary capillary wedge pressure: r = 0.65, p < 0.05, mean difference 2.2 mm Hg, 95% CI 0.1 to 4.3). Compared with right-sided cardiac catheterization, PVR by Doppler echocardiography identified all patients with PVR > 4 Wood units (n = 4), 73% of patients with PVR <2 Wood units (n = 8), and 52% of patients with PVR from 2 to 4 Wood units (n = 10). In conclusion, echocardiographic estimation of cardiopulmonary hemodynamics is reliable in patients with end-stage cardiomyopathy. The noninvasive assessment of hemodynamics by echocardiography may be able to decrease the number of serial right-sided cardiac catheterizations in selected patients awaiting heart transplantation. However, in patients with borderline PVR, right-sided cardiac catheterization is indicated to assess eligibility for transplantation. PMID:21094370

  7. Jugular Venous Catheterization: A Case of Knotting

    PubMed Central

    Erk?l?ç, E.; Aksoy, M.; Gümü?, T.; Sar?, S.; Kesimci, E.

    2015-01-01

    A 79-year-old woman, diagnosed for cancer of the ovary, had a central catheter that was placed with difficulty through the right internal jugular vein intraoperatively. After oophorectomy, it was realized that the catheter was knotted. Thus, the central venous catheter was removed successfully using a traction technique in the operating room. Central venous catheter use may result in various complications, although it has been used as an invasive method for hemodynamic monitoring and fluid and drug infusion. Here, we present catheter knotting in a case with solutions for this complication, under literature review.

  8. Changes in Selected Biochemical Indices Resulting from Various Pre-sampling Handling Techniques in Broilers

    PubMed Central

    2011-01-01

    Background Since it is not yet clear whether it is possible to satisfactorily avoid sampling-induced stress interference in poultry, more studies on the pattern of physiological response and detailed quantification of stress connected with the first few minutes of capture and pre-sampling handling in poultry are required. This study focused on detection of changes in the corticosterone level and concentrations of other selected biochemical parameters in broilers handled in two different manners during blood sampling (involving catching, carrying, restraint, and blood collection itself) that lasted for various time periods within the interval 30-180 seconds. Methods Stress effects of pre-sampling handling were studied in a group (n = 144) of unsexed ROSS 308 broiler chickens aged 42 d. Handling (catching, carrying, restraint, and blood sampling itself) was carried out in a gentle (caught, held and carried carefully in an upright position) or rough (caught by the leg, held and carried with lack of care in inverted position) manner and lasted for 30 s, 60 s, 90 s, 120 s, 150 s, and 180 s. Plasma corticosterone, albumin, glucose, cholesterol, lactate, triglycerides and total protein were measured in order to assess the stress-induced changes to these biochemical indices following handling in the first few minutes of capture. Results Pre-sampling handling in a rough manner resulted in considerably higher plasma concentrations of all biochemical indices monitored when compared with gentle handling. Concentrations of plasma corticosterone after 150 and 180 s of handling were considerably higher (P < 0.01) than concentrations after 30-120 s of handling regardless of handling technique. Concentrations of plasma lactate were also increased by prolonged handling duration. Handling for 90-180 seconds resulted in a highly significant elevation of lactate concentration in comparison with 30 s handling regardless of handling technique. Similarly to corticosterone concentrations, a strong positive correlation was found between plasma lactate and duration of pre-sampling handling. Other biochemical indices monitored did not show any correlation pattern in connection with duration of pre-sampling handling. Conclusions These results indicate that the pre-sampling procedure may be a considerably stressful procedure for broilers, particularly when carried out with lack of care and exceeding 120 seconds. PMID:21569531

  9. Computed tomography colonography in 2014: an update on technique and indications.

    PubMed

    Laghi, Andrea

    2014-12-01

    Twenty years after its introduction, computed tomographic colonography (CTC) has reached its maturity, and it can reasonably be considered the best radiological diagnostic test for imaging colorectal cancer (CRC) and polyps. This examination technique is less invasive than colonoscopy (CS), easy to perform, and standardized. Reduced bowel preparation and colonic distention using carbon dioxide favor patient compliance. Widespread implementation of a new image reconstruction algorithm has minimized radiation exposure, and the use of dedicated software with enhanced views has enabled easier image interpretation. Integration in the routine workflow of a computer-aided detection algorithm reduces perceptual errors, particularly for small polyps. Consolidated evidence from the literature shows that the diagnostic performances for the detection of CRC and large polyps in symptomatic and asymptomatic individuals are similar to CS and are largely superior to barium enema, the latter of which should be strongly discouraged. Favorable data regarding CTC performance open the possibility for many different indications, some of which are already supported by evidence-based data: incomplete, failed, or unfeasible CS; symptomatic, elderly, and frail patients; and investigation of diverticular disease. Other indications are still being debated and, thus, are recommended only if CS is unfeasible: the use of CTC in CRC screening and in surveillance after surgery for CRC or polypectomy. In order for CTC to be used appropriately, contraindications such as acute abdominal conditions (diverticulitis or the acute phase of inflammatory bowel diseases) and surveillance in patients with a long-standing history of ulcerative colitis or Crohn's disease and in those with hereditary colonic syndromes should not be overlooked. This will maximize the benefits of the technique and minimize potential sources of frustration or disappointment for both referring clinicians and patients. PMID:25492999

  10. Computed tomography colonography in 2014: An update on technique and indications

    PubMed Central

    Laghi, Andrea

    2014-01-01

    Twenty years after its introduction, computed tomographic colonography (CTC) has reached its maturity, and it can reasonably be considered the best radiological diagnostic test for imaging colorectal cancer (CRC) and polyps. This examination technique is less invasive than colonoscopy (CS), easy to perform, and standardized. Reduced bowel preparation and colonic distention using carbon dioxide favor patient compliance. Widespread implementation of a new image reconstruction algorithm has minimized radiation exposure, and the use of dedicated software with enhanced views has enabled easier image interpretation. Integration in the routine workflow of a computer-aided detection algorithm reduces perceptual errors, particularly for small polyps. Consolidated evidence from the literature shows that the diagnostic performances for the detection of CRC and large polyps in symptomatic and asymptomatic individuals are similar to CS and are largely superior to barium enema, the latter of which should be strongly discouraged. Favorable data regarding CTC performance open the possibility for many different indications, some of which are already supported by evidence-based data: incomplete, failed, or unfeasible CS; symptomatic, elderly, and frail patients; and investigation of diverticular disease. Other indications are still being debated and, thus, are recommended only if CS is unfeasible: the use of CTC in CRC screening and in surveillance after surgery for CRC or polypectomy. In order for CTC to be used appropriately, contraindications such as acute abdominal conditions (diverticulitis or the acute phase of inflammatory bowel diseases) and surveillance in patients with a long-standing history of ulcerative colitis or Crohn’s disease and in those with hereditary colonic syndromes should not be overlooked. This will maximize the benefits of the technique and minimize potential sources of frustration or disappointment for both referring clinicians and patients. PMID:25492999

  11. Laparoscopic major hepatectomies: current trends and indications. A comparison with the open technique.

    PubMed

    Ratti, Francesca; Cipriani, Federica; Ariotti, Riccardo; Giannone, Fabio; Paganelli, Michele; Aldrighetti, Luca

    2015-06-01

    Diffusion of laparoscopic major hepatectomies is experiencing a steady increasing trend, although slower compared to minor resections. The aim of this single-center study is to discuss current trends and indications in the application of minimally invasive techniques to major hepatic resections. Preoperative patients and disease characteristics of 49 laparoscopic major hepatectomies (LPS group), performed between 2005 and 2015, were compared with 585 open hepatectomies (Open group) to analyze differences in patients recruitment. Factors which were found to be differently distributed between groups were used as covariates in a propensity score-based case-matched analysis with a 1:3 ratio between LPS group and 147 patients from the Open group (constituting Open-mat group). Short-term outcome was analyzed in matched groups. ASA score, previous abdominal surgery, previous interventional procedures, indication, lesion size and associated procedures were significantly different between the LPS and the Open group. Short-term outcome analysis revealed that blood loss (200 vs 350 mL, p = 0.044) and time for functional recovery (3 vs 4 days, p = 0.05) were reduced in the LPS compared to the Open-mat group, in spite of longer length of surgery (260 vs 170 min, p = 0.041) and comparable oncological adequacy. Even though data on technical feasibility of laparoscopic major resections and their benefits in terms of blood loss and functional recovery support the diffusion of minimally invasive approach, the limit of the technique is still represented by the reduced pool of suitable candidates. PMID:26133297

  12. A Modified Catheterization Procedure to Reduce Bladder Damage when Collecting Urine Samples from Holstein Cows

    PubMed Central

    TAMURA, Tetsuo; NAKAMURA, Hiroshi; SATO, Say; SEKI, Makoto; NISHIKI, Hideto

    2014-01-01

    ABSTRACT This study proposed a modified procedure, using a small balloon catheter (SB catheter, 45 ml), for reducing bladder damage in cows. Holstein cows and the following catheters were prepared: smaller balloon catheter (XSB catheter; 30 ml), SB catheter and standard balloon catheter (NB catheter; 70 ml, as the commonly used, standard size). In experiment 1, each cow was catheterized. The occurrence of catheter-associated hematuria (greater than 50 RBC/HPF) was lower in the SB catheter group (0.0%, n=7) than in the NB catheter group (71.4%, n=7; P<0.05). In experiment 2, general veterinary parameters, urine pH, body temperature and blood values in cows were not affected before or after insertion of SB catheters (n=6). The incidence of urinary tract infection (UTI) was 3.0% per catheterized day (n=22). In experiment 3, feeding profiles, daily excretion of urinary nitrogen (P<0.05) and rate from nitrogen intake in urine (P<0.01), were higher with use of the SB catheter (n=13) than with the use of the vulva urine cup (n=18), indicating that using the SB catheter can provide accurate nutritional data. From this study, we concluded that when using an SB catheter, the following results occur; reduction in bladder damage without any veterinary risks and accuracy in regard to feeding parameters, suggesting this modified procedure using an SB catheter is a useful means of daily urine collection. PMID:24561376

  13. Burnei’s “double X" internal fixation technique for supracondylar humerus fractures in children: indications, technique, advantages and alternative interventions

    PubMed Central

    Georgescu, I; Gavriliu, S; Pârvan, A; Martiniuc, A; Japie, E; Ghi??, R; Dr?ghici, I; Hamei, S; ?iripa, I; El Nayef, T; Dan, D

    2013-01-01

    Background. The Study and Research Group in Pediatric Orthopedics-2012 initated this retrospective study due to the fact that in Romania and in other countries, the numerous procedures do not ensure the physicians a definite point of view related to the therapeutic criteria in the treatment of supracondylar fractures. That is why the number of complications and their severity brought into notice these existent deficiencies. In order to correct some of these complications, cubitus varus or valgus, Prof. Al. Pesamosca communicated a paper called "Personal procedure in the treatment of posttraumatic cubitus varus" at the County Conference from Bac?u, in June 24, 1978. This procedure has next been made popular by Prof. Gh. Burnei and his coworkers by operating patients with cubitus varus or valgus due to supracondylar humeral fractures and by presenting papers related to the subject at the national and international congresses. The latest paper regarding this problem has been presented at the 29th Annual Meeting of the European Pediatric Orthopedic Society in Zagreb, Croatia, April 7-10, 2010, being titled “Distal humeral Z-osteotomy for posttraumatic cubitus varus or valgus", having as authors Gh. Burnei, Ileana Georgescu, ?tefan Gavriliu, Costel Vlad and Daniela Dan. As members of this group, based on the performed studies, we wish to make popular this type of osteosynthesis, which ensures a tight fixation, avoids complications and allows a rapid postoperative activity. Introduction. The acknowledged treatment for these types of fractures is the orthopedic one and it must be accomplished as soon as possible, in the first 6 hours, by reduction and cast immobilization or by closed or open reduction and fixation, using one of the several methods (Judet, Boehler, Kapandji, San Antonio, San Diego, Burnei’s double X technique). The exposed treatment is indicated in irreducible supracondylar humeral fractures, in reducible, but unstable type, in polytraumatized patients with supracondylar fractures, in supracondylar fractures with vascular injury, in late presenting fractures, in case of loss of reduction under cast immobilization or in case of surgery with other types of fixation that is deteriorated. We have been using Burnei’s osteosynthesis for about 10 years. Aim. This paper aims to present the operative technique, its results and advantages. Materials and methods. 56 cases were treated with Burnei’s "double X" osteosynthesis in "Alexandru Pesamosca" Surgery Clinics, from 2001 to 2011. We used the Kocher approach and the aim of surgery was to obtain a fixation that does not require cast immobilization and that allows motion 24 hours after the surgery. The wires placed in "double X" must not occupy the olecranon fossa. The reduction must be anatomical and the olecranon fossa free. Flexion and extension of the elbow must be in normal range after surgery without crackles or limitations. This surgery was performed on patients with: • Loss of reduction after 10 days with cast immobilization; • Surgery with other types of fixation, deteriorated; • Polytraumatized patients with supracondylar fracture; • After neglected or late presenting fractures, without the orthopedic reduction made in emergency; • Fractures with edema and blistering. Results and complications. The patients’ ages ranged 3 to12 years old, the mean age for girls was 7,3 years and 6,8 for boys. The hospitalization ranged 3 to 7 days, the average period being of 5 days. The wires had been pulled out after 21 days. The total recovery of the flexion and extension motion of the elbow was, depending on the age, between 21 and 40 days with an average period of 30 days. There were 5 cases of minor complications: in 3 cases the wires migrated outwards up to the 10th day and in 2 cases the wires were found in the olecranon fossa. The CT exam highlighted the impingement effect and the wire that passed through the olecranon fossa had to be removed between the 7th and the 9th day. No reported cas

  14. Iliopsoas abscess as a complication of tunneled jugular vein catheterization in a hemodialysis patient.

    PubMed

    Hsiao, Po-Jen; Tsai, Ming-Hsien; Leu, Jyh-Gang; Fang, Yu-Wei

    2015-04-01

    Iliopsoas abscess is a rare complication in hemodialysis patients that is mainly due to adjacent catheterization, local acupuncture, discitis, and bacteremia. Herein, we report a 47-year-old woman undergoing regular hemodialysis via a catheter in the internal jugular vein who presented with low back pain and dyspnea. A heart murmur suggested the presence of catheter-related endocarditis, and this was confirmed by an echocardiogram and a blood culture of methicillin-resistant Staphylococcus aureus. A computed tomography indicated a pulmonary embolism and an incidental finding of iliopsoas abscess. Following surgical intervention and intravenous daptomycin, the patient experienced full recovery and a return to usual activities. This case indicates that an iliopsoas abscess can be related to a jugular vein catheter, which is apparently facilitated by infective endocarditis. The possibility of iliopsoas abscess should be considered when a hemodialysis patient presents with severe low back pain, even when there is no history of adjacent mechanical intervention. PMID:25040197

  15. Transjugular intrahepatic portosystemic shunt for acute variceal gastrointestinal bleeding: Indications, techniques and outcomes.

    PubMed

    Loffroy, R; Favelier, S; Pottecher, P; Estivalet, L; Genson, P Y; Gehin, S; Krausé, D; Cercueil, J-P

    2015-01-01

    Acute variceal bleeding is a life-threatening condition that requires a multidisciplinary approach for effective therapy. The transjugular intrahepatic portosystemic shunt (TIPS) procedure is a minimally invasive image-guided intervention used for secondary prevention of bleeding and as salvage therapy in acute bleeding. Emergency TIPS should be considered early in patients with refractory variceal bleeding once medical treatment and endoscopic sclerotherapy fail, before the clinical condition worsens. Furthermore, admission to specialized centers is mandatory in such a setting and regional protocols are essential to be organized effectively. This procedure involves establishment of a direct pathway between the hepatic veins and the portal veins to decompress the portal venous hypertension that is the source of the patient's bleeding. The procedure is technically challenging, especially in critically ill patients, and has a mortality of 30%-50% in the emergency setting, but has an effectiveness greater than 90% in controlling bleeding from gastro-esophageal varices. This review focuses on the role of TIPS in the setting of variceal bleeding, with emphasis on current indications and techniques for TIPS creation, TIPS clinical outcomes, and the role of adjuvant embolization of varices. PMID:26094039

  16. Cardiovascular procedures/diagnostic techniques and therapeutic procedures

    SciTech Connect

    Tilkian, A.G.; Daily, E.K.

    1986-01-01

    This book covers the technical and therapeutic aspects of cardiovascular procedures in immense detail. There are large and appropriate diagrams and tables. The topics of the chapters are tools for catheterization, venous access, arterial access, hemodynamic monitoring, cardiac catheterization and coronary arteriography, ergonovine provocation testing for coronary artery spasm, pulmonary angiography, endomyocredial biopsy, electrophysiologic studies, pericardiocentesis and drainage, intraaortic balloon pumping, direct current cardioversion and defibrilaltion, pacemaker implantation of the automatic implantable cardioverter/defibrillator, coronary angioplasty, thrombolytic therapy, transluminal catheter extraction and resolution of intracardiac catheter knots, cardiopulmonary resuscitation, contrast media toxicity and allergic reactions, radiation hazards, and medicolegal concerns. An appendix and index follow these chapters. In general, each chapter covers historical aspects, indications, complications, techniques, and preoperative and postoperative care.

  17. Catheter cleaning for re-use in intermittent catheterization: new light on an old problem.

    PubMed

    Lavallée, D J; Lapierre, N M; Henwood, P K; Pivik, J R; Best, M; Springthorpe, V S; Sattar, S A

    1995-03-01

    Clean intermittent catheterization is a common method of urinary elimination for people with Spinal Cord Injuries. The methods of catheter cleaning for re-use, however, have not been validated with research studies. This study compared the effectiveness of Hydrogen Peroxide, vinegar, dishwashing detergent, and tap water alone to clean catheters contaminated with Pseudomonas aeruginosa and Escherichia coli. The effect of rinsing and drying before cleaning was also examined, as well as the effect of storage in paper or plastic bags after cleaning. Results indicated that rinsing and drying catheters immediately after use was the most effective at reducing bacteria to very near zero. Elements of a procedure are outlined, as well as plans for further development and testing of a rinse & dry procedure for catheter cleaning and re-use. PMID:7792576

  18. Modification of the Microtiter Technique for Antimicrobial Drug Susceptibility Testing by Incorporation of Indicators

    PubMed Central

    Tippett, L. O.; Zeleznick, L. D.; Robb, C. A.

    1970-01-01

    A pH indicator and dextrose were incorporated into growth media as a modification of microbial microtiter methods for determining the minimal inhibitory concentration of antimicrobial drugs. This modified method was tested to evaluate the ease of reading end points by changes in the indicator color. Application of the procedure to two media, three indicators, and eight species of bacteria indicated that definitive end points could be reached as a result of indicator color change caused by acid production during bacterial growth. This method is accurate and reproducible. It is a modification which eliminates a need for plating and facilitates the reading of minimal inhibitory concentration end points. PMID:5485717

  19. Urinary Catheterization May Not Adversely Impact Quality of Life in Multiple Sclerosis Patients

    PubMed Central

    Frasure, Heidi E.; Mahajan, Sangeeta T.

    2014-01-01

    Background. Multiple sclerosis (MS) healthcare providers (HCP) have undergone considerable educational efforts regarding the importance of evaluating and treating pelvic floor disorders, specifically, urinary dysfunction. However, limited data are available to determine the impact of catheterization on patient quality of life (QoL). Objectives. To describe the use of urinary catheterization among MS patients and determine the differences between those who report positive versus negative impact of this treatment on QoL. Methods. Patients were queried as part of the 2010 North American Research Committee On Multiple Sclerosis survey; topics included 1) urinary/bladder, bowel, or sexual problems; 2) current urine leakage; 3) current catheter use; 4) catheterizing and QoL. Results. Respondents with current urine leakage were 5143 (54.7%), of which 1201 reported current catheter use (12.8%). The types of catheters (intermittent self-catheterization and Foley catheter (indwelling and suprapubic)) did not differ significantly. Of the current catheter users, 304 (25.35%) respondents reported catheterization negatively impacting QoL, 629 (52.4%) reported a positive impact on QoL, and 223 (18.6%) reported neutral QoL. Conclusions. A large proportion of catheterized MS patients report negative or positive changes in QoL associated with urinary catheterization. Urinary catheterization does not appear to have a universally negative impact on patient QoL. PMID:25006498

  20. Anatomic shoulder arthroplasty: an update on indications, technique, results and complication rates

    PubMed Central

    MATTEI, LORENZO; MORTERA, STEFANO; ARRIGONI, CHIARA; CASTOLDI, FILIPPO

    2015-01-01

    A shoulder replacement is indicated in patients affected by glenohumeral arthropathy with severely reduced range of motion, persistent pain, especially at night, and loss of strength. There is much discussion in the scientific community about the prosthetic options for these cases: hemiarthroplasty, anatomic total shoulder arthroplasty, and reverse total shoulder arthroplasty. We analyzed the indications for, results of, and complications associated with this kind of surgery, focusing on anatomic arthroplasty and on the concept of modularity. PMID:26605254

  1. HYPERSPECTRAL TECHNIQUE AS AN INDICATOR OF EUTROPHICATION AND SEDIMENT LOAD FOR DEEP RIVERS

    EPA Science Inventory

    Remote sensing techniques were used to characterize and quantify spatial and temporal variation in water quality of the Great Miami River in Ohio. An initial feasibility study was conducted in the summer of 1999 using a non-imaging hand-held spectroradiometer to ascertain the pre...

  2. INDICATOR OF EUTROPHICATION AND SEDIMENT LOAD: HYPERSPECTRAL TECHNIQUE FOR CONTINUOUS COVERAGE OF DEEP RIVERS

    EPA Science Inventory

    Remote sensing techniques were used to characterize and quantify spatial and temporal variation in water quality of the Great Miami River in Ohio. An initial feasibility study was conducted in the summer of 1999 using a non-imaging hand-held spectroradiometer to ascertain the pr...

  3. Energy analysis of substorms based on remote sensing techniques, solar wind measurements, and geomagnetic indices

    E-print Network

    Ã?stgaard, Nikolai

    Energy analysis of substorms based on remote sensing techniques, solar wind measurements to balance the energy budget. We find that a viscous interaction that transfers 0.17% of the solar wind, is sufficient to balance the total energy dissipation UT. INDEX TERMS: 2784 Magnetospheric Physics: Solar wind

  4. Total Reconstruction of the Auricle: Our Experiences on Indications and Recent Techniques

    PubMed Central

    Storck, K.; Staudenmaier, R.; Buchberger, M.; Strenger, T.; Kreutzer, K.; von Bomhard, A.; Stark, T.

    2014-01-01

    Introduction. Auricular reconstruction is a great challenge in facial plastic surgery. With the advances in surgical techniques and biotechnology, different options are available for consideration. The aim of this paper is to review the knowledge about the various techniques for total auricular reconstruction based on the literature and our experience. Methods. Approximately 179 articles published from 1980 to 2013 were identified, and 59 articles were included. We have focused on the current status of total auricular reconstruction based on our personal experience and on papers of particular interest, published within the period of review. We have also included a prospective view on the tissue engineering of cartilage. Results. Most surgeons still practice total auricular reconstruction by employing techniques developed by Brent, Nagata, and Firmin with autologous rib cartilage. Within the last years, alloplastic frameworks for reconstruction have become well established. Choosing the reconstruction techniques depends mainly on the surgeon's preference and experience. Prosthetic reconstruction is still reserved for special conditions, even though the material is constantly improving. Tissue engineering has a growing potential for clinical applicability. Conclusion. Auricular reconstruction still receives attention of plastic/maxillofacial surgeons and otolaryngologists. Even though clinical applicability lags behind initial expectations, the development of tissue-engineered constructs continues its potential development. PMID:24822198

  5. Log-Linear Techniques for the Analysis of Categorical Data: A Demonstration with the Myers-Briggs Type Indicator.

    ERIC Educational Resources Information Center

    Salter, Daniel W.

    2003-01-01

    Log-linear analysis (LLA) techniques for categorical variables are demonstrated and evaluated using data from the Myers-Briggs Type Indicator. Symmetrical LLA and asymmetrical LLA address questions of association and inference, respectively. Configural frequency analysis is examined as a strategy for whole types research. LLA approaches seem…

  6. IMMUNOLOGICAL AND BIOSENSOR TECHNIQUES FOR DETECTING NON-MICROBIAL INDICATORS OF HUMAN FECAL POLLUTION

    EPA Science Inventory

    Limitations exist in applying the conventional microbial methods to the detection of human fecal contamination in water. Recently, there has been an increased interest in developing supplemental and/or alternate indicators of human contamination to better define water quality an...

  7. Experience of stenting for atherosclerotic renal artery stenosis in a cardiac catheterization laboratory: Technical considerations and complications

    PubMed Central

    Jokhi, Percy P; Ramanathan, Krishnan; Walsh, Simon; Fung, Anthony Y; Saw, Jacqueline; Fox, Rebecca S; Zalunardo, Nadia; Buller, Christopher E

    2009-01-01

    BACKGROUND Atherosclerotic renal artery (RA) stenosis contributes to hypertension, renal insufficiency and end stage renal disease, and is independently associated with adverse cardiovascular events. Percutaneous renal intervention is efficacious in treating renovascular hypertension and may be effective in stabilizing or improving renal function, thereby reducing cardiovascular risk. However, high rates of procedural complications have been reported. OBJECTIVES To determine the nature and frequency of complications of percutaneous renal intervention using contemporary techniques and equipment in a high-volume cardiac catheterization laboratory. METHODS Consecutive patients undergoing attempted RA stenting for atherosclerotic RA stenosis in the cardiac catheterization laboratory at the Vancouver General Hospital (Vancouver, British Columbia) between June 2000 and March 2007 were enrolled in a prospective registry. Baseline clinical characteristics, procedural and technical information, and complications were recorded. RESULTS A total of 132 RAs were stented in 106 patients during 108 procedures. The procedural success rate was 100%, with no related death, myocardial infarction, nephrectomy or dialysis. Major complications included three pseudoaneurysms (2.8%) and acute deterioration in renal function in six patients (5.5%), although renal function returned to baseline in one patient at 12 months. CONCLUSIONS RA stenting can be successfully and safely performed using contemporary techniques, and the low complication rates described should be the minimum standard for contemporary trials evaluating RA stenting. PMID:19668788

  8. Supporting 64-bit global indices in Epetra and other Trilinos packages : techniques used and lessons learned.

    SciTech Connect

    Jhurani, Chetan; Austin, Travis M.; Heroux, Michael Allen; Willenbring, James Michael

    2013-06-01

    The Trilinos Project is an effort to facilitate the design, development, integration and ongoing support of mathematical software libraries within an object-oriented framework. It is intended for large-scale, complex multiphysics engineering and scientific applications [2, 4, 3]. Epetra is one of its basic packages. It provides serial and parallel linear algebra capabilities. Before Trilinos version 11.0, released in 2012, Epetra used the C++ int data-type for storing global and local indices for degrees of freedom (DOFs). Since int is typically 32-bit, this limited the largest problem size to be smaller than approximately two billion DOFs. This was true even if a distributed memory machine could handle larger problems. We have added optional support for C++ long long data-type, which is at least 64-bit wide, for global indices. To save memory, maintain the speed of memory-bound operations, and reduce further changes to the code, the local indices are still 32-bit. We document the changes required to achieve this feature and how the new functionality can be used. We also report on the lessons learned in modifying a mature and popular package from various perspectives - design goals, backward compatibility, engineering decisions, C++ language features, effects on existing users and other packages, and build integration.

  9. Speech and swallowing rehabilitation following devastating caustic ingestion: techniques and indicators for success.

    PubMed

    Shikowitz, M J; Levy, J; Villano, D; Graver, L M; Pochaczevsky, R

    1996-02-01

    Caustic material ingestion, either accidental or intentional, may result in tissue and organ destruction leading to a wide range of complications, including loss of speech and the ability to eat. The esophagus can be reconstructed successfully, but reopening the larynx and upper airway poses a significant therapeutic dilemma. External reconstruction may put the neoesophagus at risk. Loss of the normal swallowing mechanism and the protective supraglottic structures often results in fatal aspiration. The authors present three cases of successful endoscopic laser recannulation of the larynx with esophageal replacement. The discussion includes surgical technique and the tools used to determine the success of the reconstruction, including computed tomographic scanning, modified barium swallow, placement of an upper esophageal anastomosis, psychologic support, and speech and swallowing therapy. PMID:8569409

  10. [Pancreas transplantation: a survey on indications, surgical techniques, immunosuppression, complications and outcome].

    PubMed

    Drognitz, O; Hopt, U T

    2003-10-01

    Since its introduction in 1966, pancreas transplantation has undergone considerable progress. Refinements in surgical technique, better organ preservation solutions, and more potent immunosuppressive therapies have improved patient and graft-survival rates dramatically. Survival rates for patient and pancreas at 1 year approach 95 and 83 %, resp., for simultaneous pancreas and kidney transplantation, and 97 and 78 %, resp., for pancreas alone. US pancreas graft and patient survival rates do not significantly differ from the results of the European centers. However, there is still a hesitant acceptance of combined pancreas-kidney transplantation in Germany. Combined pancreas-kidney transplantation is nowadays the treatment of choice in carefully selected patients with type 1 insulin-dependent diabetes mellitus and end-stage renal failure. Many US centers even advocate combined transplantation in diabetic patients at a pre-uremic stage. Pancreas transplantation significantly improves quality of life and provides excellent long-term glycemic control which halts or even ameliorates secondary diabetic complications such as microangiopathy and neuropathy. In addition, there is increasing evidence that successful pancreas transplantation significantly prolongs patient survival mainly by a reduction of cardiovascular-related mortality. Current 10-year patient survival rate after SPK exceeds 70 %. For diabetics with end-stage renal disease there is no alternative treatment available with comparable live expectancy. However, morbidity and mortality after SPK is still higher than for kidney transplantation alone in the first year. Outcome of isolated pancreas transplantation is also improving but this technique is still restricted to non-uremic patients with severe diabetic complications or with brittle diabetes and severe impairment of quality of life. PMID:14628231

  11. Cardiac magnetic resonance 'virtual catheterization' for the quantification of valvular regurgitations and cardiac shunt.

    PubMed

    Aquaro, Giovanni Donato; Barison, Andrea; Todiere, Giancarlo; Festa, Pierluigi; Ait-Ali, Lamia; Lombardi, Massimo; Di Bella, Gianluca

    2015-10-01

    Cardiac magnetic resonance (CMR) is considered the gold-standard noninvasive technique for the quantification of ventricular volumes by cine-imaging and of vascular flows by velocity-encoded phase contrast (VENC). In routine CMR scans, it is common to found clinical conditions, as valve regurgitations and cardiac shunts, producing a volume overload and significant mismatch between the right and left ventricular stroke volumes (RSV and LSV). In the presence of a valve regurgitation, the volume overload involves the respective ventricular chamber, whereas in cardiac shunts, the location of the volume overload depends on the site of the anatomic defect. Moreover, when a cardiac shunt is present, pulmonary and systemic cardiac outputs are different (Qp/Qs??1), whereas in the presence of valve regurgitation, Qp/Qs?=?1. Therefore, by combining the cine-imaging with the VENC technique, it is possible to investigate the cardiac physiology underlying different pathological conditions producing volume overload, and to quantify this overload (the regurgitant volume and/or shunt volume). In this report, we discussed the technical, theoretical and methodological aspects of this sort of 'virtual catheterization' by CMR, providing a simple algorithm to make the correct diagnosis. PMID:25643193

  12. Real-time MRI-guided right heart catheterization in adults using passive catheters

    PubMed Central

    Ratnayaka, Kanishka; Faranesh, Anthony Z.; Hansen, Michael S.; Stine, Annette M.; Halabi, Majdi; Barbash, Israel M.; Schenke, William H.; Wright, Victor J.; Grant, Laurie P.; Kellman, Peter; Kocaturk, Ozgur; Lederman, Robert J.

    2013-01-01

    Aims Real-time MRI creates images with superb tissue contrast that may enable radiation-free catheterization. Simple procedures are the first step towards novel interventional procedures. We aim to perform comprehensive transfemoral diagnostic right heart catheterization in an unselected cohort of patients entirely using MRI guidance. Methods and results We performed X-ray and MRI-guided transfemoral right heart catheterization in consecutive patients undergoing clinical cardiac catheterization. We sampled both cavae and both pulmonary arteries. We compared success rate, time to perform key steps, and catheter visibility among X-ray and MRI procedures using air-filled or gadolinium-filled balloon-tipped catheters. Sixteen subjects (four with shunt, nine with coronary artery disease, three with other) underwent paired X-ray and MRI catheterization. Complete guidewire-free catheterization was possible in 15 of 16 under both. MRI using gadolinium-filled balloons was at least as successful as X-ray in all procedure steps, more successful than MRI using air-filled balloons, and better than both in entering the left pulmonary artery. Total catheterization time and individual procedure steps required approximately the same amount of time irrespective of image guidance modality. Catheter conspicuity was best under X-ray and next-best using gadolinium-filled MRI balloons. Conclusion In this early experience, comprehensive transfemoral right heart catheterization appears feasible using only MRI for imaging guidance. Gadolinium-filled balloon catheters were more conspicuous than air-filled ones. Further workflow and device enhancement are necessary for clinical adoption. PMID:22855740

  13. Determination of the mean cross-sectional area of the thoracic aorta using a double indicator dilution technique.

    PubMed

    Kornet, L; Jansen, J R; Gussenhoven, E J; Versprille, A

    1996-10-01

    A double indicator dilution technique for determining the mean cross-sectional area (CSA) of a blood vessel in vivo is presented. Analogous to the thermodilution method, dilution of hypertonic saline was measured by an electrical conductance technique. Because the change in conductance rather than absolute conductance was used to calculate CSA, pulsatile changes in shear rate of blood and conductance of surrounding tissues had no effect on the data. To calculate CSA from an ion mass balance, cardiac output was needed and estimated from the thermodilution curve using the same "cold" (hypertonic) saline injection. The mean CSA, obtained from this double indicator dilution method (CSAGD), was compared with the CSA obtained from the intravascular ultrasound method (IVUS) in 44 paired observations in six piglets. The regression line is close to the line of identity (CSAGD = -1.83 + 1.06 . CSAIVUS, r = 0.96). The difference between both CSAs was independent of the diameter of the vessel, on average -0.99 mm2 +/- 2.64 mm2 (mean CSAGD = 46.84 +/- 8.21 mm2, mean CSAIVUS = 47.82 +/- 9.08 mm2) and not significant. The results show that the double indicator dilution method is a reliable technique for estimating the CSA of blood vessels in vivo. PMID:8781202

  14. Comparison of remote sensing techniques for measurements of aircraft emissions indices at airports

    NASA Astrophysics Data System (ADS)

    Schaefer, Klaus P.; Jahn, Carsten; Sturm, Peter J.; Lechner, Bernhard; Bacher, Michael; Gostomczyk, Adam; Kabarowska, Barbara; Zalewski, Leszec; Dahl, Guenter

    2004-02-01

    The emission indices of aircraft engine exhausts were measured at airports non-intrusively by FTIR emission spectrometry at the engine nozzle exit as well as by FTIR absorption spectrometry and DOAS (Differential Optical Absorption Spectrometry) behind the aircraft. Two measurement campaigns were performed to compare these different measurement methods. A kerosene powered burner was operated in that way that the different methods were applied for the exhaust gas investigations during the same time and at nearly the same exhaust gas volume. The burner was built with a nozzle exit diameter of 37 cm and a power of about 150 kW. Fresh air was pumped into the burner tube by a fan. Calibration gases as pure CO and NO were added in different amounts to vary the concentration of these gases in the exhaust. The sampling probe of an intrusive measurement system was installed in the centre of the exhaust stream near the exhaust exit for measurements of these gases and CO2 as well as NO2, UHC, SO2 and O2. An APU (GTCP36-300) in a test bed was used in the same way. CO was mixed into the exhausts near the nozzle exit. The passive FTIR instrument was operated in the test bed using special noise and vibration isolation. The open-path instruments were installed at the chimney exit on the roof of the test bed building. The deviations between the different measurement methods were in the order of +/-10 up to +/-20 %.

  15. Incidence and Predictors of Radial Artery Occlusion Associated Transradial Catheterization

    PubMed Central

    Tuncez, Abdullah; Kaya, Zeynettin; Aras, Dursun; Y?ld?z, Abdulkadir; Gül, Enes Elvin; Tekinalp, Mehmet; Karaka?, Mehmet Fatih; K?sac?k, Halil Lütfü

    2013-01-01

    In this study, we sought to assess the incidence and predictors of radial artery occlusion (RAO), which is a significant complication of transradial cardiac catheterization. We prospectively evaluated the results of 106 patients who underwent coronary angiography and percutaneous coronary intervention (PCI) via the transradial approach (TRA). At the 3rd h of intervention, the radial artery was checked by palpation; color doppler ultrasonography was performed at the 24th h. Fluoroscopy duration, procedure success, and complications of the radial artery were recorded. The procedure was successfully completed in all patients. RAO was detected in eight female and two male patients. In terms of RAO, there was a statistically significant difference between males and females (p=0.019). Other parameters did not show a significant correlation with RAO. Altough did not have any effect on procedural success, eight patients developed transient radial artery spasm. Gender was not associated with radial arterial spasms (p=0.19). TRA in the diagnosis and treatment of coronary artery disease has shown high procedural success and low complication rates; it addition, it presents a low economic burden. It should be used widely and be involved in the routine cardiology residency program. PMID:24151442

  16. Premedication with midazolam for urethral catheterization of febrile infants.

    PubMed

    Weiser, Giora; Cohen, Dana; Krauss, Baruch; Galbraith, Roger; Shavit, Itai

    2014-08-01

    Febrile infants undergoing urethral catheterization (UC) are often not treated for pain and distress. The aim was to evaluate the effectiveness of midazolam premedication. We compared a convenience sample of infants who underwent UC with midazolam with those who did not receive midazolam. Outcome measures were Visual Analog Scale assessment, duration of cry, and emergency department length of stay. Thirty-two study participants and 18 controls were prospectively enrolled. Midazolam premedication showed a 53% decrease in the mean Visual Analog Scale score when parents assessed distress (33.6 vs. 71.7, P<0.0001) and a 48% decrease when nurses assessed distress (28.7 vs. 55.5, P<0.0002); the median cry duration was significantly shorter (0 vs. 240 s). Serious adverse events were not observed during sedation and at 48 h after discharge. Study participants had longer emergency department length of stay compared with the controls (191.5 vs. 139 min, P<0.017). In this cohort, midazolam significantly reduced the distress associated with UC without causing serious adverse events. PMID:24323046

  17. Pharmacotherapy in the cardiac catheterization laboratory: evolution and recent developments

    PubMed Central

    Thind, Guramrinder S; Parida, Raunak; Gupta, Nishant

    2014-01-01

    Many recent innovations have been made in developing new antiplatelet and anticoagulant drugs in the last few years, with a total of nine new antithrombotic drugs approved by the Food and Drug Administration after the year 2000. This has revolutionized the medical therapy given to manage acute coronary syndrome and support cardiac catheterization. The concept of dual antiplatelet therapy has been emphasized, and clopidogrel has emerged as the most-popular second antiplatelet drug after aspirin. Newer P2Y12 inhibitors like prasugrel and ticagrelor have been extensively studied and compared to clopidogrel. The role of glycoprotein (Gp) IIb/IIIa inhibitors is being redefined. Other alternatives to unfractionated heparin have become available, of which enoxaparin and bivalirudin have been studied the most. Apart from these, many more drugs with novel therapeutic targets are being studied and are currently under development. In this review, current evidence on these drugs is presented and analyzed in a way that would facilitate decision making for the clinician. For this analysis, various high-impact clinical trials, pharmacological studies, meta-analyses, and reviews were accessed through the MEDLINE database. Adopting a unique interdisciplinary approach, an attempt has been made to integrate pharmacological and clinical evidence to better understand and appreciate the pros and cons of each of these classes of drugs. PMID:25364258

  18. Suprapubic Bladder Aspiration or Urethral Catheterization: Which is More Painful in Uncircumcised Male Newborns?

    PubMed Central

    Badiee, Zohreh; Sadeghnia, Alireza; Zarean, Noushin

    2014-01-01

    Background: The aim was to compare the intensity of pain caused by suprapubic aspiration (SPA) and urethral catheterization for urine sampling in premature infants. Methods: A prospective randomized controlled design with 80 premature infants in Alzahra University Hospital, Isfahan, Iran was conducted. Premature newborns who needed urine samples for microbiologic analysis were randomly assigned into two groups: SPA group and urethral catheterization group. Newborn faces and upper parts of the body were videotaped during the study and the pain was assessed during urine collection using Premature Infant Pain Profile (PIPP) score. Furthermore, crying time compared between groups. Results: The mean crying time was significantly higher in SPA than urethral catheterization group (77 vs. 34.4 s) (P < 0.001). The PIPP score was significantly lower in urethral catheterization group (13.4) than SPA group (11.5) P < 0.001. The success rate of SPA was 53% compared with 71% success rate of urethral catheterization. Conclusions: SPA is more painful than urethral catheterization in premature male infants as assessed by PIPP score and is more likely leads to procedure failure. PMID:25317295

  19. Shaping physiological indices, swimming technique, and their influence on 200m breaststroke race in young swimmers.

    PubMed

    Strzala, Marek; Stanula, Arkadiusz; G?ab, Grzegorz; Glodzik, Jacek; Ostrowski, Andrzej; Kaca, Marcin; Nosiadek, Leszek

    2015-03-01

    The aim of this study was to investigate somatic properties and physiological capacity, and analyze kinematic parameters in the 200 m breaststroke swimming race. Twenty-seven male swimmers participated in the study. They were 15.7±1.98 years old. Their average height was 1.80 ± 0.02 m and lean body mass (LBM) was 62.45 ± 8.29 kg. Physiological exercise capacity was measured in two separate 90 sec. all-out tests, one for the arms and second for legs. During the tests total work of arm cranking (TWAR) and cycling (TWLG) as well as peak of VO2 for arm (VO2peakAR) and leg (VO2peakLG) were measured. The underwater swimmers body movements were recorded during the all-out swimming 200m breaststroke speed test using an underwater camera installed on a portable trolley. The swimming kinematic parameters and propulsive or non-propulsive movement phases of the arms and legs as well as average speed (V200), surface speed (V200surface) and swimming speed in turn zones (V200turns) were extracted. V200surface was significantly related to the percentage of leg propulsion and was shown to have large effect on VO2peakLG in the Cohen analysis. V200turns depended significantly on the indicators of physiological performance and body structure: TWAR, VO2peak LG and LBM, LBM, which in turn strongly determined the measured results of TWAR, TWLG, VO2peakAR and VO2peakLG. The V200turns and V200surface were strongly associated with V200, 0.92, p < 0.001 and 0.91, p < 0.001 respectively. In each lap of the 200m swimming there was an increased percentage of propulsion of limb movement observed simultaneously with a reduction in the gliding phase in the breaststroke cycles. Key pointsThis study investigated the influence of the selected indicators of somatic properties and physiological capacity as well kinematic and coordination parameters on breaststroke swimming.In this observations the body's functional capacity have an important impact on achieving good breaststroke swimming results, the V200 was moderately associated on VO2peakLG, moreover, separate V200turns depended with VO2peakLG and on LBM and TWAR.The speed of surface breaststroke swimming - V200surface similarly as V200turns had a very strong influence on the end result of V200 , 0.91, p<0.001 and 0.92, p<0.001 respectively.The ability to swim fast on the surface (V200surface) was positively and significantly associated with the percentage time of propulsion generation -LP in the breaststroke cycle. PMID:25729298

  20. Shaping Physiological Indices, Swimming Technique, and Their Influence on 200m Breaststroke Race in Young Swimmers

    PubMed Central

    Strzala, Marek; Stanula, Arkadiusz; G?ab, Grzegorz; Glodzik, Jacek; Ostrowski, Andrzej; Kaca, Marcin; Nosiadek, Leszek

    2015-01-01

    The aim of this study was to investigate somatic properties and physiological capacity, and analyze kinematic parameters in the 200 m breaststroke swimming race. Twenty-seven male swimmers participated in the study. They were 15.7±1.98 years old. Their average height was 1.80 ± 0.02 m and lean body mass (LBM) was 62.45 ± 8.29 kg. Physiological exercise capacity was measured in two separate 90 sec. all-out tests, one for the arms and second for legs. During the tests total work of arm cranking (TWAR) and cycling (TWLG) as well as peak of VO2 for arm (VO2peakAR) and leg (VO2peakLG) were measured. The underwater swimmers body movements were recorded during the all-out swimming 200m breaststroke speed test using an underwater camera installed on a portable trolley. The swimming kinematic parameters and propulsive or non-propulsive movement phases of the arms and legs as well as average speed (V200), surface speed (V200surface) and swimming speed in turn zones (V200turns) were extracted. V200surface was significantly related to the percentage of leg propulsion and was shown to have large effect on VO2peakLG in the Cohen analysis. V200turns depended significantly on the indicators of physiological performance and body structure: TWAR, VO2peak LG and LBM, LBM, which in turn strongly determined the measured results of TWAR, TWLG, VO2peakAR and VO2peakLG. The V200turns and V200surface were strongly associated with V200, 0.92, p < 0.001 and 0.91, p < 0.001 respectively. In each lap of the 200m swimming there was an increased percentage of propulsion of limb movement observed simultaneously with a reduction in the gliding phase in the breaststroke cycles. Key points This study investigated the influence of the selected indicators of somatic properties and physiological capacity as well kinematic and coordination parameters on breaststroke swimming. In this observations the body’s functional capacity have an important impact on achieving good breaststroke swimming results, the V200 was moderately associated on VO2peakLG, moreover, separate V200turns depended with VO2peakLG and on LBM and TWAR. The speed of surface breaststroke swimming - V200surface similarly as V200turns had a very strong influence on the end result of V200 , 0.91, p<0.001 and 0.92, p<0.001 respectively. The ability to swim fast on the surface (V200surface) was positively and significantly associated with the percentage time of propulsion generation -LP in the breaststroke cycle. PMID:25729298

  1. Invasive treatment of non-ST-segment elevation acute coronary syndrome: cardiac catheterization/revascularization for all?

    PubMed

    Swahn, Eva; Alfredsson, Joakim

    2014-03-01

    Patients admitted to hospital with symptoms and signs of non-ST-segment elevation acute coronary syndromes have different risk profiles and are in need of an individualized approach that takes into consideration not only age and sex but also comorbidities such as diabetes, renal failure, hypertension, heart failure, peripheral artery disease, earlier revascularization, etc. According to evidence-based medicine and as documented in current guidelines, there is currently evidence for early catheterization and, if feasible, revascularization in high-risk patients, especially in men. Nevertheless, because of a lack of definitive evidence, there is uncertainty about treating women in the same way. Because women are usually older and have more comorbidities, they are frailer and revascularization should be indicated with greater caution. There is no evidence that catheterization as such is worse for women than for men; however, for both men and women with low risk, a less invasive approach, such as coronary computed tomography angiography, could be considered as a first diagnostic tool. PMID:24774397

  2. Ultrasound stylet for non-image-guided ventricular catheterization.

    PubMed

    Coulson, Nathaniel K; Chiarelli, Peter A; Su, David K; Chang, Jason J; MacConaghy, Brian; Murthy, Revathi; Toms, Peter; Robb, Terrence L; Ellenbogen, Richard G; Browd, Samuel R; Mourad, Pierre D

    2015-10-01

    OBJECT Urgent ventriculostomy placement can be a lifesaving procedure in the setting of hydrocephalus or elevated intracranial pressure. While external ventricular drain (EVD) insertion is common, there remains a high rate of suboptimal drain placement. Here, the authors seek to demonstrate the feasibility of an ultrasound-based guidance system that can be inserted into an existing EVD catheter to provide a linear ultrasound trace that guides the user toward the ventricle. METHODS The ultrasound stylet was constructed as a thin metal tube, with dimensions equivalent to standard catheter stylets, bearing a single-element, ceramic ultrasound transducer at the tip. Ultrasound backscatter signals from the porcine ventricle were processed by custom electronics to offer real-time information about ventricular location relative to the catheter. Data collected from the prototype device were compared with reference measurements obtained using standard clinical ultrasound imaging. RESULTS A study of porcine ventricular catheterization using the experimental device yielded a high rate of successful catheter placement after a single pass (10 of 12 trials), despite the small size of pig ventricles and the lack of prior instruction on porcine ventricular architecture. A characteristic double-peak signal was identified, which originated from ultrasound reflections off of the near and far ventricular walls. Ventricular dimensions, as obtained from the width between peaks, were in agreement with standard ultrasound reference measurements (p < 0.05). Furthermore, linear ultrasound backscatter data permitted in situ measurement of the stylet distance to the ventricular wall (p < 0.05), which assisted in catheter guidance. CONCLUSIONS The authors have demonstrated the ability of the prototype ultrasound stylet to guide ventricular access in the porcine brain. The alternative design of the device makes it potentially easy to integrate into the standard workflow for bedside EVD placement. The availability of a fast, easy-to-use, inexpensive guidance system can play a role in reducing the complication rate for EVD placement. PMID:26140670

  3. Effect of Music Therapy with Emotional-Approach Coping on Pre-Procedural Anxiety in Cardiac Catheterization

    E-print Network

    Ghetti, Claire

    2011-06-27

    of invasive procedures are used for diagnosis and treatment of CHD including bypass surgeries, percutaneous coronary interventions (PCI), diagnostic cardiac catheterizations, and implantation of defibrillators and pacemakers. Cardiac catheterization..., and electrophysiological studies. Common to each procedure is the insertion of a catheter, typically via the femoral or radial artery, that is guided toward the blood vessels of the heart. Cardiac catheterization allows visualization of physical structures, blood...

  4. Appropriate indication of fronto-orbital advancement by distraction osteogenesis in syndromic craniosynostosis: Beyond the conventional technique.

    PubMed

    Satoh, Kaneshige; Mitsukawa, Nobuyuki; Kubota, Yoshitaka; Akita, Shinsuku

    2015-12-01

    Currently the distraction technique could be very useful for posterior expansion in syndromic craniosynostosis. Even for fronto-orbital advancement (FOA), it is thought that distraction has the definitive advantage over the conventional technique. The authors describe the appropriate indication of distraction for FOA in our series of craniosynostosis patients. Since 1998, FOA by distraction has been used for 61 cases of simple and syndromic craniosynostosis. Among these, seven severe cases were extracted with a conspicuous craniofacial deformity with a multiple honeycomb appearance in 3DCT views. Early surgery for FOA by distraction to the extent possible was performed and a retrospective study was conducted. Seven children were identified. All of them exhibited a severe craniofacial deformity. Pfeiffer syndrome in 5 children and clover-leaf skull in two unidentified children were diagnosed. Mean age at surgery for FOA by distraction ranged 10-18 months. Mean operative time: 3-3.5 h. Blood loss: 230-320 mL. The mean advancement by distraction: 20-27 mm. We conclude FOA by distraction when a large amount of advancement is required for early severe cases as our series can be definitely one of the most appropriate candidates beyond the conventional technique, despite disadvantages. PMID:26463472

  5. Comparison of Ultrasonography-Guided Central Venous Catheterization Between Adult and Pediatric Populations

    SciTech Connect

    Tercan, Fahri Oguzkurt, Levent; Ozkan, Ugur; Eker, Hatice Evren

    2008-05-15

    The purpose of this study was to compare the technical success and complication rates of ultrasonography-guided central venous catheterization between adult and pediatric patients which have not been reported previously. In a 4-year period, 859 ultrasonography-guided central vein catheterizations in 688 adult patients and 247 catheterizations in 156 pediatric patients were retrospectively evaluated. Mean age was 56.3 years (range, 18 to 95 years) for adults and 3.3 years (range, 0.1 to 16.3 years) for children. The preferred catheterization site was internal jugular vein in 97% of adults and 85% of children. The technical success rate, mean number of punctures, and rate of single wall puncture were 99.4%, 1.04 (range, 1-3), and 83% for adults and 90.3%, 1.25 (range, 1-5), and 49% for children, respectively. All the differences were statistically significant (p < 0.05). Complication rates were 2.3% and 2.4% for adults and children, respectively (p > 0.05). Major complications such as pneumothorax and hemothorax were not seen in any group. In conclusion, ultrasonography-guided central venous catheterization has a high technical success rate, lower puncture attempt rate, and higher single wall puncture rate in adults compared to children. Complication rates are comparable in the two groups.

  6. Multispectral indices and advanced classification techniques to detect percent residue cover over agricultural crops using Landsat data

    NASA Astrophysics Data System (ADS)

    Pacheco, Anna; McNairn, Heather; Smith, Anne M.

    2006-08-01

    Detecting and quantifying crop residue cover on agricultural fields is essential in identifying conservation tillage practices and estimating carbon sequestration, both of which are important goals within the Agricultural Policy Framework of Agriculture and Agri-Food Canada. Crop residue is traditionally measured using ground survey techniques such as the line-transect method or visual (drive-by) assessment but these techniques are tedious, time-consuming and subjective. With the increased number of advanced earth observation satellites, remote sensing has now become a viable option for mapping agricultural land management practices and percent crop residue cover. A wide variety of indices such as the Normalized Difference Index (NDI) and the Modified Soil Adjusted Crop Residue Index (MSACRI) were developed using multispectral data for this purpose but results have been mixed. Advanced classification techniques including linear spectral mixture analysis (SMA) and spectral angle mapper (SAM) provide an alternative to derive percent crop residue cover. Landsat-7 SLC-Off data were acquired over an agricultural study site in Eastern Ontario on May 25 2005. Simultaneous ground data were collected to characterize residue type, position, direction and percent cover. NDI, MSACRI, SMA and SAM were all computed and used to derive percent crop residue cover information. Preliminary results indicate that the SMA model predicts percent crop residue cover over agricultural fields with the most success, especially over fields of corn residue with an R2 value of 0.85 (RMSE of 12.46 and D of 0.99). However, further investigation is needed where residue models are validated against a larger dataset with greater variability in percent crop residue cover.

  7. Can the Anesthesiologist Use the Radial Artery for Monitoring After Transradial Artery Catheterization?

    PubMed

    Awad, Hamdy; Quevedo, Eduardo; Abas, Motaz; Brown, Michelle; Satiani, Bhagwan; Capers, Quinn; Starr, Jean E

    2015-06-15

    The use of transradial coronary angiography and intervention is growing because of its advantages over the femoral approach. However, the small size of the radial artery can contribute to complications. We present a case of an in situ access complication of transradial coronary artery catheterization. It is important for the anesthesiologist to know about the short-term and long-term consequences of this intervention, which could lead to narrowing of the artery even beyond the site of puncture. Understanding these changes could help anesthesiologists make better decisions about using the radial artery for monitoring after transradial coronary artery catheterization procedures. PMID:26050247

  8. Evaluation of educational content of YouTube videos relating to neurogenic bladder and intermittent catheterization

    PubMed Central

    Ho, Matthew; Stothers, Lynn; Lazare, Darren; Tsang, Brian; Macnab, Andrew

    2015-01-01

    Introduction: Many patients conduct internet searches to manage their own health problems, to decide if they need professional help, and to corroborate information given in a clinical encounter. Good information can improve patients’ understanding of their condition and their self-efficacy. Patients with spinal cord injury (SCI) featuring neurogenic bladder (NB) require knowledge and skills related to their condition and need for intermittent catheterization (IC). Methods: Information quality was evaluated in videos accessed via YouTube relating to NB and IC using search terms “neurogenic bladder intermittent catheter” and “spinal cord injury intermittent catheter.” Video content was independently rated by 3 investigators using criteria based on European Urological Association (EAU) guidelines and established clinical practice. Results: In total, 71 videos met the inclusion criteria. Of these, 12 (17%) addressed IC and 50 (70%) contained information on NB. The remaining videos met inclusion criteria, but did not contain information relevant to either IC or NB. Analysis indicated poor overall quality of information, with some videos with information contradictory to EAU guidelines for IC. High-quality videos were randomly distributed by YouTube. IC videos featuring a healthcare narrator scored significantly higher than patient-narrated videos, but not higher than videos with a merchant narrator. About half of the videos contained commercial content. Conclusions: Some good-quality educational videos about NB and IC are available on YouTube, but most are poor. The videos deemed good quality were not prominently ranked by the YouTube search algorithm, consequently user access is less likely. Study limitations include the limit of 50 videos per category and the use of a de novo rating tool. Information quality in videos with healthcare narrators was not higher than in those featuring merchant narrators. Better material is required to improve patients’ understanding of their condition. PMID:26644803

  9. Correlation of continuous wave Doppler velocities with cardiac catheterization gradients: an experimental model of aortic stenosis.

    PubMed

    Smith, M D; Dawson, P L; Elion, J L; Booth, D C; Handshoe, R; Kwan, O L; Earle, G F; DeMaria, A N

    1985-12-01

    The purpose of this study was to use a canine preparation of experimental aortic stenosis to compare estimates of pressure gradient derived from continuous wave Doppler ultrasound with gradients measured directly by catheterization. Aortic stenosis was created in six mongrel dogs by placing an elastic band around the aorta. Eighty-eight different pressure gradients, ranging from 5 to 160 mm Hg, were produced by variable tightening of the aortic band. Pressure gradients were measured by micromanometer-tipped catheters placed in the left ventricle and aorta. Doppler spectral signals were simultaneously obtained using a 2.0 MHz nonimaging transducer placed directly on the surface of the ascending aorta. Doppler and pressure recordings were analyzed using a custom-designed software program to measure maximal instantaneous, mean and peak to peak gradients, as well as ejection and acceleration times. Maximal instantaneous Doppler gradient showed an excellent linear correlation with maximal instantaneous catheterization gradient (r = 0.98, SEE = 5.3 mm Hg). The correlation of Doppler-estimated maximal gradient to peak to peak catheterization gradient was also linear (r = 0.97, SEE = 6.2 mm Hg) but resulted in a systematic overestimation of pressure drop (mean overestimation = 9.0 mm Hg). Measurement of the Doppler gradient at mid-systole resulted in a more accurate correlation with the peak to peak catheterization gradient (r = 0.98, SEE = 6.1 mm Hg) and eliminated the problem of overestimation.(ABSTRACT TRUNCATED AT 250 WORDS) PMID:3905918

  10. History of Right Heart Catheterization: 100 Years of Experimentation and Methodology Development

    PubMed Central

    Nossaman, Bobby D.; Scruggs, Brittni A.; Nossaman, Vaughn E.; Murthy, Subramanyam N.; Kadowitz, Philip J.

    2010-01-01

    The development of right heart catheterization has provided the clinician the ability to diagnose patients with congenital and acquired right heart disease, and to monitor patients in the ICU with significant cardiovascular illnesses. The development of bedside pulmonary artery catheterization has become a standard of care for the critically ill patient since its introduction into the ICU almost 40 years ago. However, adoption of this procedure into the mainstream of clinical practice occurred without prior evaluation or demonstration of its clinical or cost-effectiveness. Moreover, current randomized, controlled trials provide little evidence in support of the clinical utility of pulmonary artery catheterization in the management of critically ill patients. Nevertheless, the right heart catheter is an important diagnostic tool to assist the clinician in the diagnosis of congenital heart disease and acquired right heart disease, and moreover, when catheter placement is proximal to the right auricle (atria), this catheter provides an important and safe route for administration of fluids, medications, and parenteral nutrition. The purpose of this manuscript is to review the development of right heart catheterization that led to the ability to conduct physiologic studies in cardiovascular dynamics in normal individuals and in patients with cardiovascular diseases, and to review current controversies of the extension of the right heart catheter, the pulmonary artery catheter. PMID:20160536

  11. Part versus Whole: A Randomized Trial of Central Venous Catheterization Education

    ERIC Educational Resources Information Center

    Chan, Angela; Singh, Sunita; Dubrowski, Adam; Pratt, Daniel D.; Zalunardo, Nadia; Nair, Parvarthy; McLaughlin, Kevin; Ma, Irene W. Y.

    2015-01-01

    Central venous catheterization (CVC) is a complex but commonly performed procedure. How best to teach this complex skill has not been clearly delineated. We conducted a randomized trial of the effects of two types of teaching of CVC on skill acquisition and retention. We randomly assigned novice internal medicine residents to learning CVC in-part…

  12. Radiation exposure of pediatric patients and physicians during cardiac catheterization and balloon pulmonary valvuloplasty

    SciTech Connect

    Wu, J.R.; Huang, T.Y.; Wu, D.K.; Hsu, P.C.; Weng, P.S. )

    1991-07-15

    Thermoluminescent dosimeters were applied to various areas of 61 pediatric patients and physicians to measure radiation doses during routine cardiac catheterization and during 4 cases of balloon pulmonary valvuloplasty. Radiation doses were measured during chest roentgenography, fluoroscopy and cineangiography. Average skin dose to the chest was 121 microGy during chest x-ray, 5,182 microGy during catheterization and 641 mGy during valvuloplasty. For the eyes, thyroid and gonads of the patients, the exposure during routine catheterization was equal to 0.4, 6 and 0.2 chest x-rays, respectively. Radiation dose of the operator was 3 microGy for the eyes and 6 miCroGy in the thyroid. About 56% of the operator's dose could be reduced by thyroid shields, and 80% by lead aprons. The assistant received only 1 microGy outside the thyroid shield. Therefore, the authors have concluded that the patients dose during routine catheterization is largely based on our experimental results, but the dose is acceptable based on the risk factor analysis. The skin dose to the right lateral chest of the patient during valvuloplasty is extremely high, perhaps as high as the equivalent of 1,000 chest x-rays. Besides the clinical benefits of valvuloplasty, the long-term radiation-related hazards to the patient should be carefully monitored.

  13. Direct measurement of a patient's entrance skin dose during pediatric cardiac catheterization.

    PubMed

    Sun, Lue; Mizuno, Yusuke; Iwamoto, Mari; Goto, Takahisa; Koguchi, Yasuhiro; Miyamoto, Yuka; Tsuboi, Koji; Chida, Koichi; Moritake, Takashi

    2014-11-01

    Children with complex congenital heart diseases often require repeated cardiac catheterization; however, children are more radiosensitive than adults. Therefore, radiation-induced carcinogenesis is an important consideration for children who undergo those procedures. We measured entrance skin doses (ESDs) using radio-photoluminescence dosimeter (RPLD) chips during cardiac catheterization for 15 pediatric patients (median age, 1.92 years; males, n = 9; females, n = 6) with cardiac diseases. Four RPLD chips were placed on the patient's posterior and right side of the chest. Correlations between maximum ESD and dose-area products (DAP), total number of frames, total fluoroscopic time, number of cine runs, cumulative dose at the interventional reference point (IRP), body weight, chest thickness, and height were analyzed. The maximum ESD was 80 ± 59 (mean ± standard deviation) mGy. Maximum ESD closely correlated with both DAP (r = 0.78) and cumulative dose at the IRP (r = 0.82). Maximum ESD for coiling and ballooning tended to be higher than that for ablation, balloon atrial septostomy, and diagnostic procedures. In conclusion, we directly measured ESD using RPLD chips and found that maximum ESD could be estimated in real-time using angiographic parameters, such as DAP and cumulative dose at the IRP. Children requiring repeated catheterizations would be exposed to high radiation levels throughout their lives, although treatment influences radiation dose. Therefore, the radiation dose associated with individual cardiac catheterizations should be analyzed, and the effects of radiation throughout the lives of such patients should be followed. PMID:24968708

  14. Acute kidney injury after using contrast during cardiac catheterization in children with heart disease.

    PubMed

    Hwang, Young Ju; Hyun, Myung Chul; Choi, Bong Seok; Chun, So Young; Cho, Min Hyun

    2014-08-01

    Acute kidney injury (AKI) is closely associated with the mortality of hospitalized patients and long-term development of chronic kidney disease, especially in children. The purpose of our study was to assess the evidence of contrast-induced AKI after cardiac catheterization in children with heart disease and evaluate the clinical usefulness of candidate biomarkers in AKI. A total of 26 children undergoing cardiac catheterization due to various heart diseases were selected and urine and blood samples were taken at 0 hr, 6 hr, 24 hr, and 48 hr after cardiac catheterization. Until 48 hr after cardiac catheterization, there was no significant increase in serum creatinine level in all patients. Unlike urine kidney injury molecule-1, IL-18 and neutrophil gelatinase-associated lipocalin, urine liver-type fatty acid-binding protein (L-FABP) level showed biphasic pattern and the significant difference in the levels of urine L-FABP between 24 and 48 hr. We suggest that urine L-FABP can be one of the useful biomarkers to detect subclinical AKI developed by the contrast before cardiac surgery. PMID:25120320

  15. A Simple Evaluation Method for the Quality of Dietary Protein in Rats Using an Indicator Amino Acid Oxidation Technique.

    PubMed

    Ogawa, Aki; Murayama, Haruka; Hayamizu, Kohsuke; Kobayashi, Yukiko; Kuwahata, Masashi; Kido, Yasuhiro

    2015-01-01

    We demonstrated that the indicator amino acid oxidation (IAAO) method could be employed for the evaluation of quality of dietary protein by comparing the protein intakes required to meet metabolic demand in rats fed different proteins. The objective of this study was to validate a simple evaluation method for determining the quality of dietary protein using the IAAO technique. Male Sprague-Dawley rats (5-6 wk old) were fed meals composed of graded protein, using either casein, wheat gluten (WG), soy protein isolate (SPI), or egg white protein (EW), every 3 h from 09:00 to 18:00. Administration of L-[1-(13)C]phenylalanine was performed hourly from 15:00 to 18:00. The (13)CO2 level in breath CO2 was measured at 18:30. The protein intake values required to meet the metabolic demand based on the breath (13)CO2 data for the dietary casein, WG, SPI, and EW intake were 18.0, 22.2, 17.5, and 10.1 g/kg BW/d, respectively. The breath (13)CO2 concentrations corresponding to the protein intake of 7.5 g/kg BW/d for casein, WG, SPI, and EW were 9.8, 10.9, 10.3, and 8.9 (‰)/100 g BW, respectively. A significant correlation was demonstrated between the protein intake required to meet the metabolic demands and the (13)CO2 concentration in the breath for a protein intake of 7.5 g/kg BW/d (r=0.967; p<0.05). These results demonstrated that the protein intake required to meet metabolic demand could be estimated and that the quality of the dietary protein could be evaluated using the (13)CO2 concentration in the breath with a protein intake of 7.5 g/kg BW/d. PMID:26052142

  16. Robot-assisted needle insertion for venous catheterization.

    PubMed

    Pasternak, Jacyr

    2015-09-01

    Vein access can be challenging for a variety of patients. The development of robots-assisted central or peripheral veins puncture would facilitate life of health professionals and patients. New robots are under development for this purpose and probably they will become available for practical use in the near future. These techniques may decrease significantly the cost of medicine, which currently uses less informatics resources than other industries. PMID:26313434

  17. CARDIAC CATHETERIZATION IN ADULT CONGENITAL HEART DISEASE—A Preliminary Report

    PubMed Central

    Griffith, George C.; Cosby, Richard S.; Levinson, David C.

    1950-01-01

    The diagnosis of uncomplicated ventricular septal defect and uncomplicated patent ductus arteriosus presents few hazards. Differential diagnosis of atrial septal defect and of transposed pulmonary veins is technically more difficult. The complex nature of most types of cyanotic congenital heart disease requires the combined use of catheterization, determination of circulation times, ventilation studies, and possibly angiocardiography. Reports of eight cases in which cardiac catheterization was carried out illustrate the common forms of acyanotic and cyanotic heart disease and the factors in diagnosis. ImagesFigure 1.Figure 1.Figure 2, AFigure 2, BFigure 2, CFigure 3, AFigure 3, BFigure 3, CFigure 4Figure 5, AFigure 5, BFigure 6, AFigure 6, BFigure 6, CFigure 7, AFigure 7, BFigure 8, AFigure 8, BFigure 8, CFigure 9, AFigure 9, B PMID:15414444

  18. Outcome CpE-k. Ability to use the techniques, skills, and modern tools in engineering practice. Course Performance indicators

    E-print Network

    Mohaghegh, Shahab

    process, various life cycle models, and process improvement techniques and standards. CS 230 Apply various of software engineering. CS 450 Demonstrate a working knowledge of basic OS concepts, especially process

  19. SU-E-P-10: Imaging in the Cardiac Catheterization Lab - Technologies and Clinical Applications

    SciTech Connect

    Fetterly, K

    2014-06-01

    Purpose: Diagnosis and treatment of cardiovascular disease in the cardiac catheterization laboratory is often aided by a multitude of imaging technologies. The purpose of this work is to highlight the contributions to patient care offered by the various imaging systems used during cardiovascular interventional procedures. Methods: Imaging technologies used in the cardiac catheterization lab were characterized by their fundamental technology and by the clinical applications for which they are used. Whether the modality is external to the patient, intravascular, or intracavity was specified. Specific clinical procedures for which multiple modalities are routinely used will be highlighted. Results: X-ray imaging modalities include fluoroscopy/angiography and angiography CT. Ultrasound imaging is performed with external, trans-esophageal echocardiography (TEE), and intravascular (IVUS) transducers. Intravascular infrared optical coherence tomography (IVOCT) is used to assess vessel endothelium. Relatively large (>0.5 mm) anatomical structures are imaged with x-ray and ultrasound. IVUS and IVOCT provide high resolution images of vessel walls. Cardiac CT and MRI images are used to plan complex cardiovascular interventions. Advanced applications are used to spatially and temporally merge images from different technologies. Diagnosis and treatment of coronary artery disease frequently utilizes angiography and intra-vascular imaging, and treatment of complex structural heart conditions routinely includes use of multiple imaging modalities. Conclusion: There are several imaging modalities which are routinely used in the cardiac catheterization laboratory to diagnose and treat both coronary artery and structural heart disease. Multiple modalities are frequently used to enhance the quality and safety of procedures. The cardiac catheterization laboratory includes many opportunities for medical physicists to contribute substantially toward advancing patient care.

  20. Thrombus Formation After Percutaneous Catheterization and Manual Compression of the Femoral Artery in Heparinized Sheep

    SciTech Connect

    Kim, Young Hwan; Pavcnik, Dusan Kakizawa, Hideyaki; Uchida, Barry T.; Burke, Allen; Loriaux, Marc; Keller, Frederick S.; Rosch, Josef

    2010-04-15

    The purpose of this study was to evaluate the angiographic and histopathologic changes in the superficial femoral artery (SFA) in heparinized sheep shortly after catheterization with an 8-Fr sheath and manual compression hemostasis either with standard manual compression (SMC) or with the use of a procoagulant chitosan-based HemCon Bandage. The evaluation was done in 38 SFAs of 19 heparinized (100 mg/kg) sheep. After a 5-min catheterization with an 8-Fr sheath, a 5-min compression was applied. Follow-up angiograms to evaluate hemostasis were done immediately after release of compression and then at 2.5-min intervals until no extravasation was present. Compression was reapplied between angiograms. Final angiograms were performed approximately 30 min after hemostasis and after 3 min of passive flexion and extension of sheep hind limbs. Sheep were then euthanized and SFA specimens with surrounding tissues excised for histopathologic evaluation. Both types of compression caused similar changes in the catheterized SFAs. Follow-up angiograms showed mild arterial narrowing in 14 SFAs and intraluminal clots in 9 SFAs. Histology revealed periarterial hematoma in all 38 specimens. Intraluminal thrombi consisting predominantly of platelets and fibrin were present in 32 SFAs. Their size varied from superficial elevations (8 arteries) to medium-sized, 1- to 2-mm, polypoid protrusions (15 arteries) to large polypoid clots, 3-4 mm long (9 arteries). In six SFAs, the arterial access sites were not included in the obtained specimens. In conclusion, hemostasis with manual compression is achieved in the acute phase by formation of a predominantly platelet-fibrin thrombus occluding the arterial wall access site and often extending significantly into the arterial lumen. The healing process of arterial access sites should be explored several days after catheterization.

  1. Methicillin-Resistant Staphylococcus aureus Vertebral Osteomyelitis Following Epidural Catheterization: A Case Report and Literature Review

    PubMed Central

    Krishnakumar, R.; Renjitkumar, J.

    2012-01-01

    Indwelling epidural catheters are frequently used to manage postoperative pain. This report describes a patient who developed methicillin-resistant Staphylococcus aureus (MRSA) vertebral osteomyelitis of the lumbar spine following epidural catheterization. To the best of our knowledge, this is the first reported case of MRSA vertebral osteomyelitis secondary to epidural catheter use in the English orthopedic literature. The patient and his family consented to publishing the data. PMID:24353973

  2. Predictors of Conversion from Radial Into Femoral Access in Cardiac Catheterization

    PubMed Central

    Carvalho, Maria Salomé; Calé, Rita; Gonçalves, Pedro de Araújo; Vinhas, Hugo; Raposo, Luís; Teles, Rui; Martins, Cristina; Gabriel, Henrique Mesquita; Pereira, Helder; Almeida, Manuel

    2015-01-01

    Background Fewer bleeding complications and early ambulation make radial access a privileged route for cardiac catheterization. However, transradial (TR) approach is not always successful, requiring its conversion into femoral access. Objectives To evaluate the rate of conversion from radial into femoral access in cardiac catheterization and to identify its predictors. Methods Prospective dual-center registry, including 7632 consecutive patients undergoing catheterization via the radial access between Jan/2009 and Oct/2012. We evaluated the incidence of conversion into femoral access and its predictors by logistic regression analysis. Results The patients’ mean age was 66 ± 11 years, and 32% were women. A total of 2969 procedures (38.4%) were percutaneous coronary interventions (PCI), and the most used first intention arterial access was the right radial artery (97.6%). Radial access failure rate was 5.8%. Independent predictors of conversion from radial into femoral access were the use of short introducer sheaths (OR 3.047, CI: 2.380-3.902; p < 0.001), PCI (OR 1.729, CI: 1.375-2.173; p < 0.001), female sex (OR 1.569, CI: 1.234-1.996; p < 0.001), multivessel disease (OR 1.457, CI: 1.167-1.819; p = 0.001), body surface area (BSA) ? 1.938 (OR 1.448, CI: 1.120-1.871; p = 0.005) and age > 66 years (OR 1.354, CI: 1.088-1.684; p = 0.007). Conclusion Transradial approach for cardiac catheterization has a high success rate and the need for its conversion into femoral access in this cohort was low. Female sex, older age, smaller BSA, the use of short introducer sheaths, multivessel disease and PCI were independent predictors of conversion into femoral access. PMID:25789883

  3. Risk of Bleeding in End-Stage Liver Disease Patients Undergoing Cardiac Catheterization

    PubMed Central

    Mahmoud, Ahmed M.; Elgendy, Islam Y.; Choi, Calvin Y.

    2015-01-01

    Patients with end-stage liver disease frequently have baseline coagulopathies. The international normalized ratio is in common use for the estimation of bleeding tendency in such patients, especially those undergoing an invasive procedure like cardiac catheterization. The practice of international normalized ratio measurement—followed by pharmacologic (for example, vitamin K or fresh frozen plasma) or nonpharmacologic intervention—is still debatable. The results of multiple randomized trials have shown the superiority of the radial approach over femoral access in reducing catheterization bleeding. This reduction in bleeding in turn decreases the risk and cost of blood-product transfusion. However, there is little evidence regarding the use of the radial approach in the end-stage liver disease patient population specifically. In this review, we summarize the studies that have dealt with cardiac catheterization in patients who have end-stage liver disease. We also discuss the role of the current measurements that are used to reduce the risk of bleeding in these same patients. PMID:26504433

  4. Spectrophotometric Determination of the Dissociation Constant of an Acid-Base Indicator Using a Mathematical Deconvolution Technique

    ERIC Educational Resources Information Center

    Alter, Krystyn P.; Molloy, John L.; Niemeyer, Emily D.

    2005-01-01

    A laboratory experiment reinforces the concept of acid-base equilibria while introducing a common application of spectrophotometry and can easily be completed within a standard four-hour laboratory period. It provides students with an opportunity to use advanced data analysis techniques like data smoothing and spectral deconvolution to…

  5. 07/07/2015 Toutes les informations donnes sur cette page sont indicatives et n'ont pas de valeur contractuelle LICENCE SCIENCES ET TECHNIQUES DES

    E-print Network

    Di Girolami, Cristina

    07/07/2015 Toutes les informations données sur cette page sont indicatives et n'ont pas de valeur contractuelle Page 1 / 9 LICENCE SCIENCES ET TECHNIQUES DES ACTIVITÉS PHYSIQUES ET SPORTIVES, SP. ACTIVITÉS PHYSIQUES ADAPTÉES ET SANTÉ Domaine ministériel : SCIENCES, TECHNOLOGIES, SANTÉ Mention : SCIENCES ET

  6. Transhepatic vascular access for diagnostic and interventional procedures: techniques, outcome, and complications.

    PubMed

    Ebeid, Makram R

    2007-03-01

    Early or multiple cardiac catheterizations may result in occlusion of the femoral veins prohibiting their use. The internal jugular or sub-clavian approach may be an appropriate alternative. However, these approaches may not be suitable in patients with surgical interruption of the superior vena cava. In other patients, they may not allow easy access to certain areas of the heart. The transhepatic approach is an important alternative route for performing cardiac catheterization and interventions. Depending on the planned procedure, it may be the preferred route to perform the cardiac catheterization even in the presence of patent femoral veins. The indications, technical details and potential complications of this approach are discussed. PMID:17152092

  7. Video-assisted thoracoscopic implantation of a diaphragmatic pacemaker in a child with tetraplegia: indications, technique, and results*

    PubMed Central

    Pinto, Darcy Ribeiro; Tedde, Miguel Lia; Avino, Alexandre José Gonçalves; Brandão, Suzan Lúcia Brancher; Zanatta, Iuri; Hahn, Rafael

    2015-01-01

    We report the case of a child with tetraplegia after cervical trauma, who subsequently underwent diaphragmatic pacemaker implantation. We reviewed the major indications for diaphragmatic pacing and the types of devices employed. We highlight the unequivocal benefit of diaphragmatic pacing in the social and educational reintegration of individuals with tetraplegia. PMID:25750678

  8. Video-assisted thoracoscopic implantation of a diaphragmatic pacemaker in a child with tetraplegia: indications, technique, and results.

    PubMed

    Filho Pinto, Darcy Ribeiro; Tedde, Miguel Lia; Avino, Alexandre José Gonçalves; Brandão, Suzan Lúcia Brancher; Zanatta, Iuri; Hahn, Rafael

    2015-01-01

    We report the case of a child with tetraplegia after cervical trauma, who subsequently underwent diaphragmatic pacemaker implantation. We reviewed the major indications for diaphragmatic pacing and the types of devices employed. We highlight the unequivocal benefit of diaphragmatic pacing in the social and educational reintegration of individuals with tetraplegia. PMID:25750678

  9. Clinical Application of Superior Vena Cava Spectra in Evaluation of Pulmonary Hypertension: A Comparative Echocardiography and Catheterization Study.

    PubMed

    Hou, Ying; Sun, Dan-Dan; Yuan, Li-Jun; Zhu, Xian-Yang; Shang, Fu-Jun; Hou, Chuan-Ju; Duan, Yun-You

    2016-01-01

    This study was designed to assess whether superior vena cava (SVC) Doppler flow velocities are associated with invasive measures of pulmonary arterial pressure. Eighty patients with unrepaired congenital heart disease who underwent cardiac catheterization were included (31 men, 49 women; mean age: 37.3 ± 14.7 y). Compared with the non-pulmonary hypertension group, the moderate and severe pulmonary hypertension groups had decreased SVC ventricular reserve flow velocity and a significantly increased ratio of atrial reverse flow to systolic flow (AR/S). AR/S correlated significantly with invasive pulmonary arterial systolic pressure (r = 0.426, p < 0.0001). A cutoff of 0.45 had a sensitivity and specificity of 74% and 80%, respectively, for prediction of pulmonary hypertension. Good correlation also existed between SVC AR/S and pulmonary arterial systolic pressure in cases without tricuspid regurgitation (r = 0.706, p = 0.034). These results indicate that SVC AR/S may be an alternative method for assessing pulmonary hypertension. PMID:26478279

  10. The Use of MMF Screws: Surgical Technique, Indications, Contraindications, and Common Problems in Review of the Literature

    PubMed Central

    Cornelius, Carl-Peter; Ehrenfeld, Michael

    2010-01-01

    Mandibulo-maxillary fixation (MMF) screws are inserted into the bony base of both jaws in the process of fracture realignment and immobilisation. The screw heads act as anchor points to fasten wire loops or rubber bands connecting the mandible to the maxilla. Traditional interdental chain-linked wiring or arch bar techniques provide the anchorage by attached cleats, hooks, or eyelets. In comparison to these tooth-borne appliances MMF screws facilitate and shorten the way to achieve intermaxillary fixation considerably. In addition, MMF screws help to reduce the hazards of glove perforation and wire stick injuries. On the downside, MMF screws are attributed with the risk of tooth root damage and a lack of versatility beyond the pure maintenance of occlusion such as stabilizing loose teeth or splinting fragments of the alveolar process. The surgical technique of MMF screws as well as the pros and cons of the clinical application are reviewed. The adequate screw placement to prevent serious tooth root injuries is still an issue to rethink and modify conceptual guidelines. PMID:22110819

  11. Recurrence Plot and Recurrence Quantification Analysis Techniques for Detecting a Critical Regime. Examples from Financial Market Indices

    E-print Network

    A. Fabretti; M. Ausloos

    2004-12-31

    Recurrence Plot (RP) and Recurrence Quantification Analysis (RQA) are signal numerical analysis methodologies able to work with non linear dynamical systems and non stationarity. Moreover they well evidence changes in the states of a dynamical system. We recall their features and give practical recipes. It is shown that RP and RQA detect the critical regime in financial indices (in analogy with phase transition) before a bubble bursts, whence allowing to estimate the bubble initial time. The analysis is made on DAX and NASDAQ daily closing price between Jan. 1998 and Nov. 2003. DAX is studied in order to set-up overall considerations, and as a support for deducing technical rules. The NASDAQ bubble initial time has been estimated to be on Oct. 19, 1999.

  12. Three-dimensional modelling of the venous system by direct multislice helical computed tomography venography: technique, indications and results.

    PubMed

    Uhl, J F

    2012-09-01

    The aim of multislice helical computed tomography venography (CTV) is to provide a precise, global and three-dimensional (3D) anatomical depiction of the venous network of the lower limbs. A multislice and multidetector spiral CT acquisition of the lower limbs with contrast injection of the dorsal foot produces about 1000 slices in 30 seconds. Dedicated volume-rendering software can compute a realistic and interactive 3D model of the venous system in realtime. This new tool furnishes an accurate 3D representation of the whole venous system of the lower limb with a realistic 3D model of the limbs, providing a road map of the varicose networks complementary to the duplex ultrasound (DUS). CTV allows a complete morphological study of the deep veins, including the detection of anatomical variations and proximal venous obstruction, not easily detectable by DUS. In the case of deep vein thrombosis, it has been shown to be a good diagnostic tool, well correlated with sonography. It also demonstrates, in some cases, haemodynamic patterns which are not available by DUS, particularly for perforator veins and congenital vascular malformations. The use of virtual reality techniques enables a complete anatomical study of both deep and superficial veins including a virtual dissection of the limbs. CTV is also a great educational tool to learn anatomy of the venous system and a powerful research tool to improve our knowledge of venous anatomy. PMID:23155152

  13. Measuring urban sprawl on geospatial indices characterized by leap frog development using remote sensing and GIS techniques

    NASA Astrophysics Data System (ADS)

    Noor, N. M.; Asmawi, M. Z.; Rusni, N. A.

    2014-02-01

    Characterizing urban sprawl using spatial measures requires a concise definition of what constitutes sprawling urban spatial patterns. This research attempts to study a measurement of defining sprawl by using leapfrog development index through remote sensing and GIS approach. The IKONOS pan-sharpened and SPOT-5 with 1 and 2.5 meter resolution were used and combined with Geographical information system (GIS) database to analyze the geospatial indicators using the leapfrog development index. Kuantan city has been selected as a study area to examine the leapfrog development based on land use pattern for year 2012. The findings show Kuantan has identified as non-sprawling cities with result from characterization in leapfrog development that has been tested. However, the gap between sprawl and non-sprawling was very low. It is anticipated this research will provide a new direction in sprawl nationally that address finding of sprawl at the atomic level and present a robust analytical approach for characterizing urban development in city scale at once promoting a city via GIS & Remote Sensing technology respectively towards Digital and Green cities.

  14. Arterial Catheterization

    MedlinePLUS

    ... mechanical ventilator (respirator; breathing machine) settings. The blood oxygen pres- sure measures from an arterial line give more de- tailed information than that from a pulse oximeter (a sensor that is clipped on to a patient’s finger, ...

  15. Technetium-99m dimercaptosuccinic acid uptake in long-term catheterized kidney. Comparison with renal function

    SciTech Connect

    Higashihara, E.; Tokuda, H.; Kishi, H.; Niijima, T.; Okada, Y.; Nishikawa, J.; Iio, M.

    1988-04-01

    We studied 23 long-term catheterized kidneys in 14 patients. The uptake of /sup 99m/Tc acid (/sup 99m/Tc-DMSA) was measured at one- and two-hour intervals after injection, and the uptake was corrected for variations in renal depth. These values were compared with inulin, creatinine, and para-amino hippurate (PAH) clearances which were measured in each kidney by collecting urine through long-term catheterization. Correlation coefficient was obtained between PAH clearance corrected for the body surface area and the two-hour uptake of /sup 99m/Tc-DMSA. The correlation coefficients between the two-hour uptake of /sup 99m/Tc-DMSA and the clearance values are not significantly different from those between the one-hour uptake and the clearance values. Corrections of the uptake for variations in renal depth did not improve the correlation coefficients. The results show that /sup 99m/Tc-DMSA is an excellent method to estimate the renal plasma flow and the one-hour uptake without correction for renal depth is clinically sufficient to evaluate the split renal function.

  16. New Echocardiographic Tehniques in Pulmonary Arterial Hypertension vs. Right Heart Catheterization – A Pilot Study

    PubMed Central

    CONSTANTINESCU, Tudor; MAGDA, Stefania Lucia; NICULESCU, Rodica; MINCU, Raluca Ileana; ZAHARIA, Dragos; TOMA, Claudia Lucia; CINTEZA, Mircea; BOGDAN, Miron Alexandru

    2013-01-01

    ABSTRACT Background: Pulmonary arterial hypertension (PAH) represents an emerging pathology in modern medicine. Transthoracic echocardiography is an inexpensive and reproducible method and it is the most commonly used non-invasive diagnostic tool to asses pulmonary artery pressure (PAP) and the function of the right ventricle. Although, the right heart catheterization is still considered as the standard for the diagnosis, according to the last guidelines, the new echocardiographic methods may offer an improved value in the PAH evaluation. Aim: To evaluate if cardiac ultrasonography data correlate with catheterization results in patients with PAH (Group I Dana Point 2008), and to compare the ultrasonography evaluation of PAH patients with that of normal. Methods: 15 consecutive patients (pts) (52±15 yrs, 5 men, time from onset of symptoms 1.6±1.7 years) with PAH of different aetiologies (12 pts with idiopathic PAH, 2 pts with PAH associated with scleroderma and one with persistent PAH after atrial septal defect (ASD) closure) were evaluated through: 1. clinical examination (NYHA class); 2. exercise capacity (6 minute walking test – 6MWT); 3. conventional echocardiography (diameter of right ventricle – RVD and right atrium, fractional area shortening – FAS, TAPSE, pulmonary ascension time – PA, systolic and mean PAP -sPAP, mPAP, tricuspid E/A ratio, cardiac index-CI) and 4. Tissue Doppler Imaging – TDI (systolic and diastolic myocardial velocities at the tricuspid annulus – S, D, A); 5. right heart catheterization (sPAP, mPAP, CI, pulmonary vascular resistance – PVR) We compared classical and TDI echo parameters with those obtained from 15 normal subjects, matched in age and sex. Results: PAH patients had high sPAP and mPAP with right heart dilation (RV - 44.8±7.3 mm), depressed TAPSE (16.2±5.9 mm) and cardiac index and low TDI systolic velocities at tricuspid level (7.3±2.9 cm/s). All parameters differed statistically significant from normal. There were no significant correlations between ultrasonography and catheterization (cath) parameters (sPAP 92±28.2 echo vs. 106.4±25.8 mmHg cath; mPAP 47.9±8.4 echo vs. 65.8±17.3 mmHg cath), excepting for CI 2.3±1.2 l/min/m2 vs. 2.08±0.3 ml/min/m2) and PVR (16.5 ± 15.3 Wood U echo, vs. 19.6 ± 7.9 cath). Conclusion: Classic and TDI cardiac ultrasonography represents a good screening and monitoring tool for PAH patients, but tends to underestimate the severity of the disease, leaving right heart catheterization as the essential diagnostic method for this rare disease. PMID:24371474

  17. Exercise right heart catheterization for inferior vena cava obstruction: confirming the hemodynamic significance of an anatomic lesion.

    PubMed

    Eleid, Mackram F; Bjarnason, Haraldur; Frye, Robert L; Nishimura, Rick A

    2014-01-01

    Retroperitoneal fibrosis is a rare condition characterized by the presence of inflammatory and fibrous retroperitoneal tissue that surrounds and often encases abdominal structures. In this report we describe an unusual presentation of retroperitoneal fibrosis and inferior vena cava (IVC) obstruction that was unidentified by noninvasive testing and ultimately diagnosed using exercise right heart catheterization and venography. Exercise hemodynamic catheterization revealed a high pressure gradient across the IVC obstruction during exercise that resulted in reduced preload and inappropriately low cardiac output reserve. The patient ultimately underwent angioplasty and stenting of the obstruction resulting in resolution of his symptoms. PMID:23766235

  18. Soluble CD40 Ligand in Aspirin-Treated Patients Undergoing Cardiac Catheterization

    PubMed Central

    Gremmel, Thomas; Frelinger, Andrew L.; Michelson, Alan D.

    2015-01-01

    Plasma soluble CD40 ligand (sCD40L) is mainly generated by cleavage of CD40L from the surface of activated platelets, and therefore considered a platelet activation marker. Although the predictive value of sCD40L for ischemic events has been demonstrated in patients with acute coronary syndromes (ACS), studies on the association of sCD40L with cardiovascular outcomes in lower risk populations yielded heterogeneous results. We therefore sought to investigate factors influencing sCD40L levels, and the predictive value of sCD40L for long-term ischemic events in unselected, aspirin-treated patients undergoing cardiac catheterization. sCD40L was determined by a commercially available enzyme-linked immunosorbent assay in 682 consecutive patients undergoing cardiac catheterization. Two-year follow-up data were obtained from 562 patients. Dual antiplatelet therapy with aspirin and clopidogrel was associated with significantly lower levels of sCD40L and lower platelet surface expressions of P-selectin and activated GPIIb/IIIa compared to aspirin monotherapy (all p?0.01). Hypertension was linked to lower plasma concentrations of sCD40L, whereas female sex, increasing high-sensitivity C-reactive protein, and hematocrit were associated with higher sCD40L concentrations (all p<0.05). sCD40L levels were similar in patients without and with the primary endpoint in the overall study population (p = 0.4). Likewise, sCD40L levels did not differ significantly between patients without and with the secondary endpoints (both p?0.4). Similar results were obtained when only patients with angiographically-proven coronary artery disease (n = 459), stent implantation (n = 205) or ACS (n = 125) were analyzed. The adjustment for differences in patient characteristics by multivariate regression analyses did not change the results. ROC curve analyses did not reveal cut-off values for sCD40L for the prediction of the primary or secondary endpoints. In conclusion, plasma sCD40L levels are reduced by antiplatelet therapy with clopidogrel, but not associated with long-term ischemic outcomes in unselected consecutive aspirin-treated patients undergoing cardiac catheterization. PMID:26237513

  19. Elevation of urinary liver-type fatty acid binding protein after cardiac catheterization related to cardiovascular events

    PubMed Central

    Kamijo-Ikemori, Atsuko; Hashimoto, Nobuyuki; Sugaya, Takeshi; Matsui, Katsuomi; Hisamichi, Mikako; Shibagaki, Yugo; Miyake, Fumihiko; Kimura, Kenjiro

    2015-01-01

    Purpose Contrast medium (CM) induces tubular hypoxia via endothelial damage due to direct cytotoxicity or viscosity. Urinary liver-type fatty acid binding protein (L-FABP) increases along with tubular hypoxia and may be a detector of systemic circulation injury. The aim of this study was to evaluate the clinical usefulness of detecting increases in urinary L-FABP levels due to administration of CM, as a prognostic biomarker for cardiovascular disease in patients without occurrence of CM-induced nephropathy undergoing cardiac catheterization procedure (CCP). Methods Retrospective longitudinal analyses of the relationship between urinary L-FABP levels and occurrence of cardiovascular events were performed (n=29). Urinary L-FABP was measured by ELISA before CCP, and at 6, 12, 24, and 48 hours after CCP. Results Urinary L-FABP levels were significantly higher at 12 hours (P<0.05) and 24 hours (P<0.005) after CCP compared with before CCP, only in the patients with occurrence of cardiovascular events (n=17), but not in those without cardiovascular events (n=12). The parameter with the largest area under the curve (0.816) for predicting the occurrence of cardiovascular events was the change in urinary L-FABP at 24 hours after CCP. The difference in urinary L-FABP levels (?L-FABP ?11.0 ?g/g creatinine) between before CCP and at 24 hours after CCP was a risk factor for the occurrence of cardiovascular events (hazard ratio, 4.93; 95% confidence interval, 1.27–19.13; P=0.021). Conclusion Measurement of urinary L-FABP before CCP and at 24 hours after CCP in patients with mild to moderate renal dysfunction may be an important indicator for risk stratification of onset of cardiovascular events. PMID:26316797

  20. Comparing the Use of Global Rating Scale with Checklists for the Assessment of Central Venous Catheterization Skills Using Simulation

    ERIC Educational Resources Information Center

    Ma, Irene W. Y.; Zalunardo, Nadia; Pachev, George; Beran, Tanya; Brown, Melanie; Hatala, Rose; McLaughlin, Kevin

    2012-01-01

    The use of checklists is recommended for the assessment of competency in central venous catheterization (CVC) insertion. To explore the use of a global rating scale in the assessment of CVC skills, this study seeks to compare its use with two checklists, within the context of a formative examination using simulation. Video-recorded performances of…

  1. Intrathecal catheterization alone reduces autotomy after sciatic cryoneurolysis in the rat.

    PubMed

    Serpell, M G; DeLeo, J A; Coombs, D W; Colburn, R W; Twitchell, B B; Willenbring, S; Fromm, C

    1993-01-01

    There is substantial evidence that sciatic cryoneurolysis (SCN, freeze lesion of the sciatic nerve) is a neuropathic pain model in the rat. During characterization of this model, SCN was performed 4 days after either a sham operation or the insertion of an indwelling intrathecal catheter preparatory to selective spinal drug administration. Body weight and autotomy scores were recorded for the next 22 days until sacrifice. The catheter group experienced significant weight loss (7.5%) by 4 days but rapidly regained to parity with the sham group. Autotomy scores and the frequency of severe autotomy (score > 3) were less at day 22 in the catheter group as compared with the sham-control group (p < 0.005, p < 0.03, respectively). Intrathecal catheterization itself effects the degree of behavioral response to neurogenic pain and thus, should be controlled for in studies using nociceptive animal models. PMID:8255149

  2. Radiation exposure to the pediatric patient during cardiac catheterization and angiocardiography. Emphasis on the thyroid gland

    SciTech Connect

    Martin, E.C.; Olson, A.P.; Steeg, C.N.; Casarella, W.J.

    1981-07-01

    Thermoluminescent dosimetry was used to measure the radiation exposure to the skin, thyroid and gonads in 50 consecutive pediatric patients undergoing cardiac catheterization and angiocariography using cine photofluorography. Average exposures were 17.1 R to the skin, 2.3 R to the thyroid and 0.1 R to the gonads. Fluoroscopy accounted for approximately 80% of the skin and thyroid exposure and cine photofluorography for 20 to 25%. Occasional primary-beam irradiation was the major contributor to gonad exposure. Internal scatter of the incident x-ray beam was primarily responsible for thyroid exposure, so that infants received relatively high exposures; one receiving 7.3 R. The thyroid was not frequently in the primary beam. The significance of high radiation exposure to the thyroid, and in particular its relationship to thyroid carcinoma, are discussed. The results are compared with other series in the literature and relative exposures of cine photofluorography and serial filming are contrasted.

  3. Radiation exposure to the pediatric patient during cardiac catheterization and angiocardiography. Emphasis on the thyroid gland

    SciTech Connect

    Martin, E.C.; Olson, A.P.; Steeg, C.N.; Casarella, W.J.

    1981-07-01

    Thermoluminescent dosimetry was used to measure the radiation exposure to the skin, thyroid and gonads in 50 consecutive pediatric patients undergoing cardiac catheterization and angiocardiography using cine photofluorography. Average exposures were 17.1 R to the skin, 2.3 R to the thyroid and 0.1 R to the gonads. Fluoroscopy accounted for approximately 80% of the skin and thyroid exposure and cine photofluorography for 20-25%. Occasional primary-beam irradiation was the major contributor to gonad exposure. Internal scatter of the incident x-ray beam was primarily responsible for thyroid exposure, so that infants received relatively high exposures; one receiving 7.3 R. The thyroid was not frequently in the primary beam. The significance of high radiation exposure to the thyroid, and in particular its relationship to thyroid carcinoma, are discussed. The results are compared with other series in the literature and relative exposures of cine photofluorography and serial filming are contrasted.

  4. Mycotic Saccular Abdominal Aortic Aneurysm in an Infant after Cardiac Catheterization: A Case Report.

    PubMed

    Benrashid, Ehsan; McCoy, Christopher C; Rice, Henry E; Shortell, Cynthia K; Cox, Mitchell W

    2015-10-01

    Abdominal aortic aneurysms (AAAs) are a rare entity in the pediatric population. Children with mycotic (infectious) AAA in particular are at risk of life-threatening rupture due to their rapid expansion coupled with aortic wall thinning and deterioration. Here, we present the case of a 10-month-old infant with prior 2-staged repair for hypoplastic left heart syndrome that was incidentally discovered to have a mycotic AAA on abdominal ultrasound (US) for evaluation of renovascular hypertension. Before the time of evaluation with US, the infant had developed methicillin-resistant Staphylococcus aureus bacteremia 3 days after cardiac catheterization with percutaneous thoracic aortic balloon angioplasty. She had normal aortic contours on contrasted computed tomography scan of the abdomen approximately 2 weeks before the aforementioned US evaluation. This infant subsequently underwent open aneurysmorrhaphy with cryopreserved vein patch angioplasty with resolution of her aneurysmal segment. PMID:26115611

  5. Unsteady non-Newtonian blood flow through a tapered overlapping stenosed catheterized vessel.

    PubMed

    Ali, N; Zaman, A; Sajid, M; Nieto, J J; Torres, A

    2015-11-01

    The unsteady flow characteristics of blood in a catheterized overlapping stenosed artery are analyzed in presence of body acceleration and magnetic field. The stenosed arterial segment is modeled as a rigid constricted tube. An improved shape of stenosis in the realm of the formulation of the arterial narrowing caused by atheroma is integrated in the present study. The catheter inside the artery is approximated by a thin rigid tube of small radius while the streaming blood in the artery is characterized by the Carreau model. Employing mild stenosis condition, the governing equation of the flow is derived which is then solving numerically using finite difference scheme. The variation of axial velocity, flow rate, resistance impendence and wall shear stress is shown graphically for various parameters of interest. The flow patterns illustrating the global behavior of blood are also presented. PMID:26361287

  6. Can we predict the need for clean intermittent catheterization after orthotopic neobladder construction?

    PubMed Central

    Murray, Katie S.; Arther, Andrew R.; Zuk, Keegan P.; Lee, Eugene K.; Lopez-Corona, Ernesto; Holzbeierlein, Jeffrey M.

    2015-01-01

    Introduction: We aimed to identify peri-operative and pathologic characteristics that may predict the need for clean intermittent catheterization (CIC) following radical cystectomy (RC) with orthotopic neobladder (ONB) in order to improve patient counseling on choice of urinary diversion. Materials and Methods: Between July 2004 and February 2013, all patients who underwent RC with ONB were identified. Peri-operative clinical and pathological features were evaluated and correlated with patients reported need for CIC. The independent T-test was performed for continuous variables and Chi-square test was performed for categorical variables. Multivariate forward stepwise logistic regression analysis was used to identify variables that correlated with need for CIC after ONB. Results: During the study period, 114 patients underwent RC with ONB creation. On univariate analysis, patients with higher body mass index, younger age, and non-vaginal or non-nerve-sparing procedures were more likely to require catheterization for complete emptying. Multivariate analysis demonstrates that conservative surgery (nerve sparing in males or vaginal sparing in females) was associated with a significantly lower rate of requiring CIC (Odds Ratio [OR] 0.20, P < 0.01). Surprisingly, older age was also associated with a slightly lower, but statistically significant, rate of requiring CIC (OR 0.92,P < 0.01). Conclusions: When counseling patients regarding the different types of diversions after RC, the potential need for long-term CIC after ONB must be discussed. The clinical factors that appear to increase the need for CIC include non-conservative RC (non-nerve sparing in males and non-vaginal sparing in females) and, to a certain degree, younger age.

  7. Rosuvastatin Treatment for Preventing Contrast-Induced Acute Kidney Injury After Cardiac Catheterization

    PubMed Central

    Yang, You; Wu, Yan-xian; Hu, Yun-zhao

    2015-01-01

    Abstract We performed a meta-analysis of randomized controlled trials (RCTs) to evaluate the protective effects of rosuvastatin on contrast-induced acute kidney injury (CI-AKI) and major adverse cardiovascular events (MACEs) in patients undergoing cardiac catherization. PubMed, MEDLINE, Web of Science, EMBASE, ClinicalTrials.gov, and the Cochrane Central RCTs were searched for RCTs from inception to May 2015, to compare rosuvastatin for preventing CI-AKI with placebo treatment in patients undergoing cardiac catherization. Five RCTs with a total of 4045 patients involving 2020 patients pretreated with rosuvastatin and 2025 control patients were identified and analyzed. Patients treated with rosuvastatin had a 51% lower risk of CI-AKI compared with the control group based on a fixed-effect model (OR?=?0.49, 95% CI?=?0.37–0.66, P?catheterization. However, rosuvastatin treatment did not seem to be effective for preventing CI-AKI in CKD patients undergoing elective cardiac catheterization. PMID:26222855

  8. Elementary Physics Considerations Indicate an Elegant Construction Technique For the Pyramids At Giza. Our Information Indicates They and the Sphinx Were Engineered and Built Around BCE 2500, Not Earlier!

    NASA Astrophysics Data System (ADS)

    Mc Leod, Roger D.; Mc Leod, David M.

    2002-10-01

    Archimedes articulated an applied physics experience of many children who observe the upward movement of floating objects when they get into their "tubs." This same principle can effectively allow massive Egyptian construction blocks and obelisks to be elevated and erected. Platform bases at Giza were leveled by means of water channels that were cut into the rock. There is a canal behind the pyramids. The bathtub technique can elevate or transport the water-borne block (or obelisk) to sites involved, including the Sphinx temple. Water outflow from the barge locks (tubs) can erode Sphinx surrounds, without invoking 7000+ year-ago rainy weather. Our previously detailed account of how constellations, Canis Major, Phoenix, Leo can be detected at sites like America's Stonehenge, while they are below the local horizon, also indicates ancient Egyptians may have done likewise. Orion, or Leo the Sphinx could have been detected while they were in the "underground," around BCE 2500, in alignments otherwise requiring a date of BCE 1050.

  9. A technique for determining the spectral refractive indices, size, and number density of soot particles from light scattering and spectral extinction measurements in flames

    SciTech Connect

    Felske, J.D. . Dept. of Mechanical and Aerospace Engineering); Ku, J.C. . Dept. of Mechanical Engineering)

    1992-10-01

    In this paper, the authors technique is presented that allows the spectral indices, size, and number density of soot particles in flames to be inferred from a combination of single-wavelength light scattering and multiwavelength extinction measurements. In contrast to previous schemes for inferring optical properties, the present approach does not require the introduction of a model for the spectral dispersion of the refractive index; it employs Kramers-Kronig theory instead. When applied to spherical particles, the only approximations involved are the usual ones associated with using Kramers-Kronig theory to analyze actual data, that is, for those spectral regions where experimental data are not obtainable, extrapolations and interpolations must be made. The influence of various spectral extrapolation schemes (required because of the finite spectral width of the transmittance data) is thoroughly investigated.

  10. Further fMRI validation of the visual half field technique as an indicator of language laterality: a large-group analysis.

    PubMed

    Van der Haegen, Lise; Cai, Qing; Seurinck, Ruth; Brysbaert, Marc

    2011-08-01

    The best established lateralized cerebral function is speech production, with the majority of the population having left hemisphere dominance. An important question is how to best assess the laterality of this function. Neuroimaging techniques such as functional Magnetic Resonance Imaging (fMRI) are increasingly used in clinical settings to replace the invasive Wada-test. We evaluated the usefulness of behavioral visual half field (VHF) tasks for screening a large sample of healthy left-handers. Laterality indices (LIs) calculated on the basis of the latencies in a word and picture naming VHF task were compared to the brain activity measured in a silent word generation task in fMRI (pars opercularis/BA44 and pars triangularis/BA45). Results confirmed the usefulness of the VHF-tasks as a screening device. None of the left-handed participants with clear right visual field (RVF) advantages in the picture and word naming task showed right hemisphere dominance in the scanner. In contrast, 16/20 participants with a left visual field (LVF) advantage in both word and picture naming turned out to have atypical right brain dominance. Results were less clear for participants who failed to show clear VHF asymmetries (below 20 ms RVF advantage and below 60 ms LVF advantage) or who had inconsistent asymmetries in picture and word naming. These results indicate that the behavioral tasks can mainly provide useful information about the direction of speech dominance when both VHF differences clearly point in the same direction. PMID:21708178

  11. DIAGNOSTIC CARDIAC CATHETERIZATION USING THE MEDRAD AVANTA FLUID MANAGEMENT SYSTEM AS COMPARED TO THE TRADITIONAL MANUAL INJECTION METHOD

    SciTech Connect

    Winniford, Michael D

    2013-02-08

    Nearly 4 million patient procedures performed annually in US cardiac catheterization laboratories utilize contrast media to achieve vessel opacification. The amount of contrast media used is variable and depends on the complexity of the procedure, the method of contrast delivery as well as the skill-level of the operator. Since the total amount of contrast used for each procedure can have both patient safety and economic implications, it is essential for cardiologists to have the ability to control contrast delivery such that optimal angiographic image quality is achieved using the least amount of contrast. Although the complication rate associated with cardiac catheterization remains low, the most common serious complication, contrast-induced nephropathy (CIN), is associated with poor prognosis and a high mortality rate. Numerous interventional strategies for preventing and reducing the severity of CIN have demonstrated varying degrees of clinical benefit, but none has been shown to reliably prevent this serious complication. To date, the most effective approach for reducing the risk of CIN is to properly hydrate the patient and to minimize the amount of contrast media administered. Automated injection systems are intended for use in virtually all cardiac catheterization procedures and have numerous features which can provide potential advantages over traditional methods. With automated injection technology the operator is able to control and precisely monitor contrast delivery. Additionally, the MEDRAD Avanta Fluid Management Injection System utilizes a sterile contrast reservoir which eliminates the need to discard unused contrast in individual opened containers following each procedure. Considering that an average of 50% of opened contrast media is wasted using manual injection methods, this savings can provide a substantial economic benefit. Automated systems also facilitate the use of smaller (5 French) catheter sizes. Precise flow control and the use of smaller diameter catheters have both been shown to reduce the volume of contrast administered. The use of smaller size catheters also permits more rapid hemostasis, thus allowing shorter ambulation time without the need for costly wound closure devices. These factors can result in enhanced patient satisfaction as well as more efficient management of post-procedure rooms. The intent of this study was to demonstrate that using the MEDRAD Avanta Fluid Management Injection System (MEDRAD, INC., Pittsburgh, PA) for coronary diagnostic procedures can produce a reduction in the volume of contrast administered without loss of operational quality or efficiency. In addition, this study will explore procedure time and efficiency in an effort to minimize the amount of ionizing radiation delivered to the patient as well as the diagnostic team members. Study Design This is a post-market study designed to collect data during diagnostic cardiac catheterization when utilizing 5FR or 6FR catheters in conjunction with the Avanta Fluid Management System or a manual manifold injection method control group. A minimum of 420 patients scheduled for diagnostic cardiac catheterization will be enrolled in the study cohort. Patients will be assigned into the following two groups. Group 1: Catheterization with 5FR or 6FR catheters, using the traditional manual manifold injection method for contrast media delivery which is defined as manual hand injection of contrast media through a 3 or 4 port manifold and left ventriculography performed via standard fixed rate power injection. Group 2: Catheterization with 5FR or 6FR catheters, using the MEDRAD Avanta system for contrast media delivery. Study endpoints include volume of contrast media administered during diagnostic cardiac catheterization, volume of contrast media wasted post-procedure, procedure time (defined as the time from first catheter insertion to last diagnostic catheter removal), fluoroscopy time and angiographic image quality. The study demonstrated that use of the Advanta system reduced overall contrast utilization by decreasing th

  12. Cancer mortality following cardiac catheterization: a preliminary follow-up study on 4,891 irradiated children

    SciTech Connect

    Spengler, R.F.; Cook, D.H.; Clarke, E.A.; Olley, P.M.; Newman, A.M.

    1983-02-01

    A retrospective cohort study was conducted on the risk of radiation-induced cancer mortality following cardiac catheterization. The study included 4,891 children with congenital heart disease who were assessed by cardiac catheterization during 1946 to 1968 at The Hospital for Sick Children, Toronto. The cohort was matched against the Ontario cancer death file from 1950 to 1975. The average period of follow-up was 13 years and more than 66,000 person-years have been accrued from the cohort. No deaths from breast cancer or thyroid cancer were identified. Five cancer deaths were observed and compared with 4.8 expected deaths based on Ontario cancer death rates. The five cancer deaths resulted from three leukemias, one Wilms' tumor, and one unspecified nervous system tumor. The preliminary findings did not demonstrate a significant leukemia risk arising from diagnostic cardiac catheterizations. Continued follow-up of this cohort is required to evaluate the risk of breast and thyroid cancers which can occur more than 20 years following radiation exposure.

  13. Cancer mortality following cardiac catheterization: a preliminary follow-up study on 4,891 irradiated children

    SciTech Connect

    Spengler, R.F.; Cook, D.H.; Clarke, E.A.; Olley, P.M.; Newman, A.M.

    1983-02-01

    A retrospective cohort study was conducted on the risk of radiation-induced cancer mortality following cardiac catheterization. The study included 4,891 children with congenital heart disease who were assessed by cardiac catheterization during 1946 to 1968 at The Hospital for Sick Children, Toronto. The cohort was matched against the Ontario cancer death file from 1950 to 1975. The average period of follow-up was 13 years and more than 66,000 person-years have been accrued from the cohort. No deaths from breast cancer or thyroid cancer were identified. Five cancer deaths were observed and compared with 4.8 expected deaths based on Ontario cancer death rates. The five cancer deaths resulted from three leukemias, one Wilms tumor, and one unspecified nervous system tumor. The preliminary findings did not demonstrate a significant leukemia risk arising from diagnostic cardiac catheterizations. Continued follow-up of this cohort is required to evaluate the risk of breast and thyroid cancers which can occur more than 20 years following radiation exposure.

  14. Validation of high-resolution echocardiography and magnetic resonance imaging vs. high-fidelity catheterization in experimental pulmonary hypertension.

    PubMed

    Urboniene, Dalia; Haber, Idith; Fang, Yong-Hu; Thenappan, Thenappan; Archer, Stephen L

    2010-09-01

    High-frequency echocardiography and high-field-strength magnetic resonance imaging (MRI) are new noninvasive methods for quantifying pulmonary arterial hypertension (PAH) and right ventricular (RV) hypertrophy (RVH). We compared these noninvasive methods of assessing the pulmonary circulation to the gold standard, cardiac catheterization (micromanometer-tipped catheters), in rats with monocrotaline-induced PAH and normal controls. Closed-chest, Sprague-Dawley rats were anesthetized with inhaled isoflurane (25 monocrotaline, 6 age-matched controls). Noninvasive studies used 37.5-MHz ultrasound (Vevo 770; VisualSonics) or a 9.4-T MRI (Bruker BioSpin). Catheterization used a 1.4-F micromanometer-tipped Millar catheter and a thermodilution catheter to measure cardiac output (CO). We compared noninvasive measures of pulmonary artery (PA) pressure (PAP) using PA acceleration time (PAAT) and CO, using the geometric PA flow method and RV free wall (RVFW) thickness/mass with cardiac catheterization and/or autopsy. Blinded operators performed comparisons using each method within 2 days of another. In a subset of rats with monocrotaline PAH, weekly echocardiograms, catheterization, and autopsy data assessed disease progression. Heart rate was similar during all studies (>323 beats/min). PAAT shortened, and the PA flow envelope displayed systolic "notching," reflective of downstream vascular remodeling/stiffening, within 3 wk of monocrotaline. MRI and echocardiography measures of PAAT were highly correlated (r(2) = 0.87) and were inversely proportional to invasive mean PAP (r(2) = 0.72). Mean PAP by echocardiography was estimated as 58.7 - (1.21 x PAAT). Invasive and noninvasive CO measurement correlated well (r(2) >or= 0.75). Noninvasive measures of RVFW thickness/mass correlated well with postmortem measurements. We conclude that high-resolution echocardiography and MRI accurately determine CO, PAP, and RV thickness/mass, offering similar results as high-fidelity right heart catheterization and autopsy, and that PAAT accurately estimates PAP and permits serial monitoring of experimental PAH. These tools are useful for assessment of the rodent pulmonary circulation and RVH. PMID:20581101

  15. Ultrasound or near-infrared vascular imaging to guide peripheral intravenous catheterization in children: a pragmatic randomized controlled trial

    PubMed Central

    Curtis, Sarah J.; Craig, William R.; Logue, Erin; Vandermeer, Ben; Hanson, Amanda; Klassen, Terry

    2015-01-01

    Background: Peripheral intravenous catheterization in children is challenging, and success rates vary greatly. We conducted a pragmatic randomized controlled trial to determine whether the use of ultrasound or near-infrared vascular imaging to guide catheterization would be more effective than the standard approach in achieving successful catheter placement on the first attempt. Methods: We enrolled a convenience sample of 418 children in a pediatric emergency department who required peripheral intravenous catheterization between June 2010 to August 2012. We stratified them by age (? 3 yr and > 3 yr) and randomly assigned them to undergo the procedure with the standard approach, or with the help of either ultrasound or near-infrared vascular imaging. The primary outcome was the proportion of patients who had successful placement of a catheter on the first attempt. Results: The rate of successful first attempts did not differ significantly between either of the 2 intervention groups and the standard approach group (differences in proportions ?3.9%, 95% confidence interval [CI] ?14.2% to 6.5%, for ultrasound imaging; ?8.7%, 95% CI ?19.4% to 1.9%, for near-infrared imaging). Among children 3 years and younger, the difference in success rates relative to standard care was also not significant for ultrasound imaging (?9.6%, 95% CI ?29.8% to 10.6%), but it was significantly worse for near-infrared imaging (?20.1%, 95% CI ?40.1% to ?0.2%). Among children older than 3 years, the differences in success rates relative to standard care were smaller but not significant (?2.3%, 95% CI ?13.6% to 9.0%, for ultrasound imaging; ?4.1%, 95% CI ?15.7% to 7.5%, for near-infrared imaging). None of the pairwise comparisons were statistically significant in any of the outcomes. Interpretation: Neither technology improved first-attempt success rates of peripheral intravenous catheterization in children, even in the younger group. These findings do not support investment in these technologies for routine peripheral intravenous catheterization in children. Trial registration: ClinicalTrials.gov, no. NCT01133652. PMID:25897047

  16. Modeling groundwater quality over a humid subtropical region using numerical indices, earth observation datasets, and X-ray diffraction technique: a case study of Allahabad district, India.

    PubMed

    Singh, Sudhir Kumar; Srivastava, Prashant K; Singh, Dharmveer; Han, Dawei; Gautam, Sandeep Kumar; Pandey, A C

    2015-02-01

    Water is undoubtedly the vital commodity for all living creatures and required for well-being of the human society. The present work is based on the surveys and chemical analyses performed on the collected groundwater samples in a part of the Ganga basin in order to understand the sources and evolution of the water quality in the region. The two standard indices such as water quality index and synthetic pollution index for the classification of water in the region are computed. The soil and sediment analysis are carried out with the help of X-ray diffractometer (XRD) for the identification of possible source of ions in water from rock and soil weathering. The dominant minerals which include quartz, muscovite, plagioclase, and orthoclase are reported in the area. The study further utilizes the multivariate statistical techniques for handling large and complex datasets in order to get better information about the groundwater quality. The following statistical methods such as cluster analysis (CA), factor analysis (FA), and principal component analysis (PCA) are applied to handle the large datasets and to understand the latent structure of the data. Through FA/PCAs, we have identified a total of 3 factors in pre-monsoon and 4 factors in post-monsoon season, which are responsible for the whole data structure. These factors explain 77.62 and 82.39% of the total variance of the pre- and post-monsoon datasets. On the other hand, CA depicted the regions that have similar pollutants origin. The average value of synthetic pollution index of groundwater during pre-monsoon is 9.27, while during post-monsoon, it has been recorded as 8.74. On the other hand, the average values of water quality index of groundwater during pre-monsoon and post-monsoon seasons are found as 217.59 and 233.02, respectively. The study indicates that there occurs an extensive urbanization with gradual vast development of various small- and large-scale industries, which is responsible for degradation in water quality. The overall analysis reveals that the agricultural runoff, waste disposal, leaching, and irrigation with wastewater are the main causes of groundwater pollution followed by some degree of pollution from geogenic sources such as rock and soil weathering, confirmed through XRD analysis. PMID:25086613

  17. A Bacterial Interference Strategy for Prevention of UTI in Persons Practicing Intermittent Catheterization

    PubMed Central

    Prasad, Aakansha; Cevallos, Manuel E.; Riosa, Sarah; Darouiche, Rabih O.; Trautner, Barbara W.

    2008-01-01

    Study Design Non-randomized pilot trial Objectives Determine whether Escherichia coli 83972-coated urinary catheters in persons with spinal cord injury (SCI) practicing an intermittent catheterization program (ICP) could (1) achieve bladder colonization with this benign organism, and (2) decrease the rate of symptomatic urinary tract infection (UTI). Setting Outpatient SCI clinic in a Veterans Affairs hospital (USA) Methods Participants had neurogenic bladders secondary to SCI, were practicing ICP, had experienced at least 1 UTI, and had documented bacteruria within the past year. All subjects received a urinary catheter that had been pre-inoculated with E. coli 83972. The catheter was left in place for 3 days then removed. Subjects were followed with urine cultures and telephone calls weekly for 28 days and then monthly until E. coli 83972 was lost from the urine. Outcome measures were (1) the rate of successful bladder colonization, defined as the detection (?102 cfu/ml) of E. coli 83972 in urine cultures for > 3 days after catheter removal and (2) the rate of symptomatic UTI while colonized with E. coli 83972. Results Thirteen subjects underwent 19 insertions of study catheters. Eight subjects (62%) became successfully colonized for > 3 days after catheter removal. In these 8 subjects, the rate of UTI while colonized was 0.77 per patient-year, in comparison to the rate of 2.27 UTI per patient-year prior to enrollment. Conclusions E. coli 83972-coated urinary catheters are a viable means to achieve bladder colonization with this potentially protective strain in persons practicing ICP. PMID:19139758

  18. Comparing the cost-effectiveness of simulation modalities: a case study of peripheral intravenous catheterization training.

    PubMed

    Isaranuwatchai, Wanrudee; Brydges, Ryan; Carnahan, Heather; Backstein, David; Dubrowski, Adam

    2014-05-01

    While the ultimate goal of simulation training is to enhance learning, cost-effectiveness is a critical factor. Research that compares simulation training in terms of educational- and cost-effectiveness will lead to better-informed curricular decisions. Using previously published data we conducted a cost-effectiveness analysis of three simulation-based programs. Medical students (n = 15 per group) practiced in one of three 2-h intravenous catheterization skills training programs: low-fidelity (virtual reality), high-fidelity (mannequin), or progressive (consisting of virtual reality, task trainer, and mannequin simulator). One week later, all performed a transfer test on a hybrid simulation (standardized patient with a task trainer). We used a net benefit regression model to identify the most cost-effective training program via paired comparisons. We also created a cost-effectiveness acceptability curve to visually represent the probability that one program is more cost-effective when compared to its comparator at various 'willingness-to-pay' values. We conducted separate analyses for implementation and total costs. The results showed that the progressive program had the highest total cost (p < 0.001) whereas the high-fidelity program had the highest implementation cost (p < 0.001). While the most cost-effective program depended on the decision makers' willingness-to-pay value, the progressive training program was generally most educationally- and cost-effective. Our analyses suggest that a progressive program that strategically combines simulation modalities provides a cost-effective solution. More generally, we have introduced how a cost-effectiveness analysis may be applied to simulation training; a method that medical educators may use to investment decisions (e.g., purchasing cost-effective and educationally sound simulators). PMID:23728476

  19. Balloon valvuloplasty as destination therapy in elderly with severe aortic stenosis: a cardiac catheterization study

    PubMed Central

    Kamperidis, Vasileios; Hadjimiltiades, Stavros; Ziakas, Antonios; Sianos, Georgios; Kazinakis, Georgios; Giannakoulas, George; Mouratoglou, Sophia-Anastasia; Sarafidou, Athanasia; Ventoulis, Ioannis; Efthimiadis, Georgios K; Parcharidis, Georgios; Karvounis, Haralambos

    2015-01-01

    Background In the current era of transcatheter aortic valve replacement, there is renewed interest in balloon aortic valvuloplasty (BAV) and invasive hemodynamic evaluation of aortic stenosis (AS). The current report aimed to study the invasive hemodynamics of severe AS patients treated with BAV as destination therapy and to identify factors associated with better hemodynamic outcome and prognosis. Methods From 2009 to 2012, 63 high risk elderly patients were treated with BAV as destination therapy for symptomatic severe AS and were all prospectively included in the study. Their hemodynamics were invasively evaluated during catheterization, pre- and post-BAV at the same session. All Post-BAV patients were regularly followed-up. Results The patients (82 ± 6 years, 52% male) had post-BAV aortic valve area index (AVAi) significantly increased and mean pressure gradient (MPG) significantly reduced. During the follow-up of 0.9 (maximum 3.3) years, those with post-BAV AVAi < 0.6 cm2/m2 compared with the AVAi ? 0.6 cm2/m2 group had significantly higher mortality (60% vs. 28%, log-rank P = 0.02), even after adjusting for age, gender, atrial fibrillation, chronic kidney disease, diabetes mellitus, coronary artery disease and EuroSCORE [HR: 5.58, 95% confidence interval (CI): 1.62?19.20, P = 0.006]. The only independent predictor of moderate AS post-BAV was the pre-BAV AVAi increase by 0.1cm2/m2 (OR: 3.81, 95% CI: 1.33?10.89, P = 0.01). Pre-BAV AVAi ? 0.39 cm2/m2 could predict with sensitivity 84% and specificity 70% the post-BAV hemodynamic outcome. Conclusions BAV as destination therapy for severe AS offered immediate and significant hemodynamic improvement. The survival was significantly better when a moderate degree of AS was present. PMID:26089844

  20. Lysine from cooked white rice consumed by healthy young men is highly metabolically available when assessed using the indicator amino acid oxidation technique.

    PubMed

    Prolla, Ivo R D; Rafii, Mahroukh; Courtney-Martin, Glenda; Elango, Rajavel; da Silva, Leila P; Ball, Ronald O; Pencharz, Paul B

    2013-03-01

    Cooked white rice (CWR) provides up to 71% of the dietary protein for many people worldwide. The protein digestibility-corrected amino acid (AA) score is the method adopted by FAO/WHO to evaluate protein quality. Our group has proposed the metabolic availability (MA) of AAs as another determinant of protein quality. It measures the percentage of an indispensable AA that is incorporated during protein synthesis. This study is the first to our knowledge to assess the MA of l-lysine (L-Lys) from CWR in humans using the indicator AA oxidation (IAAO) technique. Three amounts of L-Lys, 10, 15, and 19 mg?·?kg(-1)?·?d(-1) (= 28.5, 42.8, and 54.3% of the mean L-Lys requirement of 35 mg?·?kg(-1)?·?d(-1)), were studied in 5 healthy young men in a repeated-measures design. To test the principle that the Maillard reaction has an effect on the MA of LLys, we also assessed the MA of L-Lys in oven-browned, cooked rice (n = 3) in the amount of 19 mg?·?kg(-1)?·?d(-1) L-Lys. The MA of L-Lys was estimated by comparing the IAAO response with varying L-Lys intakes in rice compared with the IAAO response to varying l-Lys intakes in the reference protein (crystalline AA mixture patterned after egg protein) using the slope ratio method. The MA of L-Lys from CWR was high (97%), but the effect of the Maillard reaction reduced it to 70%. The results show that despite its relatively low content in rice, L-Lys has a high MA when the rice is cooked without being browned. PMID:23325920

  1. Measurement of oxygen consumption in children undergoing cardiac catheterization: comparison between mass spectrometry and the breath-by-breath method.

    PubMed

    Guo, Long; Cui, Yong; Pharis, Scott; Walsh, Mark; Atallah, Joseph; Tan, Meng-Wei; Rutledge, Jennifer; Coe, J Y; Adatia, Ian

    2014-06-01

    Accurate measurement of oxygen consumption (VO2) is important to precise calculation of blood flow using the Fick equation. This study aimed to validate the breath-by-breath method (BBBM) of measuring oxygen consumption VO2 compared with respiratory mass spectroscopy (MS) for intubated children during cardiac catheterization. The study used MS and BBBM to measure VO2 continuously and simultaneously for 10 min in consecutive anesthetized children undergoing cardiac catheterization who were intubated with a cuffed endotracheal tube, ventilated mechanically, and hemodynamically stable, with normal body temperature. From 26 patients, 520 data points were obtained. The mean VO2 was 94.5 ml/min (95 % confidence interval [CI] 65.7-123.3 ml/min) as measured by MS and 91.4 ml/min (95 % CI 64.9-117.9 ml/min) as measured by BBBM. The mean difference in VO2 measurements between MS and BBBM (3.1 ml/min; 95 % CI -1.7 to +7.9 ml/min) was not significant (p = 0.19). The MS and BBBM VO2 measurements were highly correlated (R (2) = 0.98; P < 0.0001). Bland-Altman analysis showed good correspondence between MS and BBBM, with a mean difference of -3.01 and 95 % limits of agreement ranging from -26.2 to +20.0. The mean VO2 indexed to body surface area did not differ significantly between MS and BBBM (3.4 ml/min m(2); 95 % CI -1.4 to 8.2; p = 0.162). The mean difference and limits of agreement were -3.8 ml/min m(2) (range, -19.9 to 26.7). Both MS and BBBM may be used to measure VO2 in anesthetized intubated children undergoing cardiac catheterization. The two methods demonstrated excellent agreement. However, BBBM may be more suited to clinical use with children. PMID:24352664

  2. Stenting as a Rescue Treatment of a Pulmonary Artery False Aneurysm Caused by Swan-Ganz Catheterization

    PubMed Central

    Keymel, Stefanie; Merx, Marc W.; Zeus, Tobias; Kelm, Malte; Steiner, Stephan

    2014-01-01

    Pulmonary vascular injury is a rare but life-threatening complication of Swan-Ganz catheterization. We report an 82-year old patient who underwent right heart catheterization by a balloon-tipped catheter because of suspected pulmonary hypertension. After deflation of the catheter in the wedge position, hemoptoe appeared associated with acute respiratory insufficiency requiring respiratory support by intubation and mechanical ventilation. Pulmonary angiography showed the formation of a false aneurysm of a segment artery of the left lower lobe. Immediate interventional therapy was performed by the implantation of two coated coronary stent grafts into the injured pulmonary artery thereby excluding the false aneurysm. Bleeding was stopped by this interventional approach while antegrade blood flow was maintained. Long term follow-up after 3 months showed an effective treatment with a completely thrombotic false aneurysm. However, despite oral anticoagulation and dual antiplatelet therapy, graft patency could not be achieved after 3 months. In summary, implantation of coated stents is a feasible and safe approach for the acute and long term treatment of potentially life-threatening condition of a pulmonary artery false aneurysm while treatment to achieve long term patency of the affected vessel still remains an issue to be resolved. PMID:25610693

  3. [Total body MRI in early detection of bone metastasis and its indication in comparison to bone scan and other imaging techniques].

    PubMed

    Luna, Antonio; Vilanova, Joan C; Alcalá Mata, Lidia

    2015-04-01

    Bone metastases are a recognized prognostic factor in patients with prostate cancer. Currently, Tc99 bone scan is the most frequently used imaging technique for their detection, showing a high sensitivity but a limited specificity. Thus, new morphological and mainly functional imaging techniques based on PET and MRI, or hybrid techniques such as PET-CT or PET-MRI have been introduced to improve metastases detection, estimation of total tumor load and for therapeutic monitoring. In this clinical scenario, total body MRI has arisen as a very promising technique in detection and therapeutic monitoring of bone metastases of prostate cancer, because it neither uses ionizing radiation nor needs the administration of contrast media. The incorporation of MR diffusion to the morphologic total body MRI protocols provides functional information, improving the sensitivity in oncological lesions detection in general and osteolytic bone metastases of PCa in particular. Its integration in protocols with morphological sequences and its quantification through ADC maps enables us to better understand metastatic bone disease patterns and their changes with different therapies. Total body D MRI enables the early classification of the response to treatment with evident advantages over other imaging techniques and the purely morphological approach with MRI. In any case, prospective and cost-effectiveness studies are necessary to establish the role of total-body D MRI in the management of patients with PCa. PMID:25948807

  4. Imaging with organic indicators and high-speed charge-coupled device cameras in neurons: some applications where these classic techniques have advantages.

    PubMed

    Ross, William N; Miyazaki, Kenichi; Popovic, Marko A; Zecevic, Dejan

    2015-04-01

    Dynamic calcium and voltage imaging is a major tool in modern cellular neuroscience. Since the beginning of their use over 40 years ago, there have been major improvements in indicators, microscopes, imaging systems, and computers. While cutting edge research has trended toward the use of genetically encoded calcium or voltage indicators, two-photon microscopes, and in vivo preparations, it is worth noting that some questions still may be best approached using more classical methodologies and preparations. In this review, we highlight a few examples in neurons where the combination of charge-coupled device (CCD) imaging and classical organic indicators has revealed information that has so far been more informative than results using the more modern systems. These experiments take advantage of the high frame rates, sensitivity, and spatial integration of the best CCD cameras. These cameras can respond to the faster kinetics of organic voltage and calcium indicators, which closely reflect the fast dynamics of the underlying cellular events. PMID:26157996

  5. Further fMRI Validation of the Visual Half Field Technique as an Indicator of Language Laterality: A Large-Group Analysis

    ERIC Educational Resources Information Center

    Van der Haegen, Lise; Cai, Qing; Seurinck, Ruth; Brysbaert, Marc

    2011-01-01

    The best established lateralized cerebral function is speech production, with the majority of the population having left hemisphere dominance. An important question is how to best assess the laterality of this function. Neuroimaging techniques such as functional Magnetic Resonance Imaging (fMRI) are increasingly used in clinical settings to…

  6. Resource Utilisation Performance Indicators in the Public Sector of Higher Education, or Never Mind the Technique Feel the Structure. Coombe Lodge Information Bank Number 1450.

    ERIC Educational Resources Information Center

    Birch, Derek W.; Cuthbert, R. E.

    A discussion is presented of the process of resource allocation and the use of performance indicators in public sector higher education in Britain. First, background is presented on the method of providing resources to institutions of advanced further education (AFE) and non-advanced further education (NAFE) on the basis of pooled recurrent…

  7. Thermal indicator for wells

    DOEpatents

    Gaven, Jr., Joseph V. (Oakton, VA); Bak, Chan S. (Newbury Park, CA)

    1983-01-01

    Minute durable plate-like thermal indicators are employed for precision measuring static and dynamic temperatures of well drilling fluids. The indicators are small enough and sufficiently durable to be circulated in the well with drilling fluids during the drilling operation. The indicators include a heat resistant indicating layer, a coacting meltable solid component and a retainer body which serves to unitize each indicator and which may carry permanent indicator identifying indicia. The indicators are recovered from the drilling fluid at ground level by known techniques.

  8. An evaluation of single-site statistical downscaling techniques in terms of indices of climate extremes for the Midwest of Iran

    NASA Astrophysics Data System (ADS)

    Farajzadeh, M.; Oji, R.; Cannon, A. J.; Ghavidel, Y.; Massah Bavani, A.

    2015-04-01

    Seven single-site statistical downscaling methods for daily temperature and precipitation, including four deterministic algorithms [analog model (ANM), quantile mapping with delta method extrapolation (QMD), cumulative distribution function transform (CDFt), and model-based recursive partitioning (MOB)] and three stochastic algorithms [generalized linear model (GLM), Conditional Density Estimation Network Creation and Evaluation (CaDENCE), and Statistical Downscaling Model-Decision Centric (SDSM-DC] are evaluated at nine stations located in the mountainous region of Iran's Midwest. The methods are of widely varying complexity, with input requirements that range from single-point predictors of temperature and precipitation to multivariate synoptic-scale fields. The period 1981-2000 is used for model calibration and 2001-2010 for validation, with performance assessed in terms of 27 Climate Extremes Indices (CLIMDEX). The sensitivity of the methods to large-scale anomalies and their ability to replicate the observed data distribution in the validation period are separately tested for each index by Pearson correlation and Kolmogorov-Smirnov (KS) tests, respectively. Combined tests are used to assess overall model performances. MOB performed best, passing 14.5 % (49.6 %) of the combined (single) tests, respectively, followed by SDSM, CaDENCE, and GLM [14.5 % (46.5 %), 13.2 % (47.1 %), and 12.8 % (43.2 %), respectively], and then by QMD, CDFt, and ANM [7 % (45.7 %), 4.9 % (45.3 %), and 1.6 % (37.9 %), respectively]. Correlation tests were passed less frequently than KS tests. All methods downscaled temperature indices better than precipitation indices. Some indices, notably R20, R25, SDII, CWD, and TNx, were not successfully simulated by any of the methods. Model performance varied widely across the study region.

  9. Study of Radially Varying Magnetic Field on Blood Flow through Catheterized Tapered Elastic Artery with Overlapping Stenosis

    NASA Astrophysics Data System (ADS)

    Nadeem, S.; Ijaz, S.

    2015-11-01

    A precise model has been developed for studying the influence of metallic nanoparticles on blood flow through catheterized tapered elastic arteries with radially varying magnetic field. The model is solved under the mild stenosis approximation by considering blood as viscous fluid. The influence of different flow parameters associated with this problem such as Hartmann number, nanoparticle volume fraction, Grashof number and heat source or sink parameter is analyzed by plotting the graphs of the wall shear stress, resistance impedance to blood flow and stream lines. The influence of the radially varying magnetic field on resistance impedance to flow is analyzed and it is observed that the significantly strong magnetic force tends to increase in resistance.

  10. ECOLOGICAL INDICATORS

    EPA Science Inventory

    An international symposium on ecological indicators was developed to explore both the potential of ecological indicators and the issues surrounding their development and implementation. his symposium presented state-of-the-science information on the identification, application re...

  11. Estimating the Incidence of Suspected Epidural Hematoma and the Hidden Imaging Cost of Epidural Catheterization: A Retrospective Review of 43,200 Cases

    PubMed Central

    Henneman, Justin P.; Sandberg, Warren S.

    2013-01-01

    Introduction Hematoma associated with epidural catheterization is rare, but the diagnosis might be suspected relatively frequently. We sought to estimate the incidence of suspected epidural hematoma after epidural catheterization, and to determine the associated cost of excluding or diagnosing an epidural hematoma through radiologic imaging. Methods We conducted an electronic retrospective chart review of 43,200 patient charts using 4 distinct search strategies and cost analysis, all from a single academic institution from 2001 through 2009. Charts were reviewed for use of radiological imaging studies to identify patients with suspected and confirmed epidural hematomas. Costs for imaging to exclude or confirm the diagnosis were related to the entire cohort. Results In our analysis, over a 9-year period that included 43,200 epidural catheterizations, 102 patients (1:430) underwent further imaging studies to exclude or confirm the presence of an epidural hematoma—revealing 6 confirmed cases and an overall incidence (per 10,000 epidural blocks) of epidural hematoma of 1.38 (95% CI 0, 0.002). Among our patients, 207 imaging studies, primarily lumbar spine MRI, were performed. Integrating Medicare cost expenditure data, the estimated additional cost over a 9-year period for imaging and hospital charges related to identifying epidural hematomas nets to approximately $232,000 or an additional $5.37 per epidural. Discussion About 1 in 430 epidural catheterization patients will be suspected to have an epidural hematoma. The cost of excluding the diagnosis, when suspected, is relatively low when allocated across all epidural catheterization patients. PMID:23924685

  12. Transcatheter Coronary Artery Diagnostic Techniques including Impedance-Catheter and Impedance-Guidewire Measurement of Absolute Coronary Blood Flow

    PubMed Central

    Vogel, Robert A.; Martin, Lisa W.

    1989-01-01

    Interventional cardiology requires precise assessment of coronary anatomy and physiology. Unfortunately, however, important interventional decisions are frequently made on the basis of arteriographic data alone. Increasing evidence suggests that visual interpretation of coronary arteriographic studies is irreproducible, inaccurate, and poorly predictive of coronary physiology. Moreover, arteriography is of little value in assessing endothelial ulceration and mural thrombus, which are important pathophysiologic features of unstable angina and acute myocardial infarction. In response to these limitations, several diagnostic transcatheter techniques have been developed that allow more complete assessment of coronary physiology and function. These include fiberoptic angioscopy, reflection spectroscopy (which can combine automated laser therapy with diagnosis), ultrasonic catheterization, and translesional gradient determination. Doppler catheterization permits the assessment of overall coronary flow reserve with the aid of induced hyperemia, whereas subselective digital radiography allows the evaluation of regional coronary flow reserve. The coronary flow reserve, however, may be falsely lowered immediately after balloon dilation, because of endothelial injury, repeated ischemia, or the administration of vasoactive drugs. To circumvent this problem, we have developed impedance-catheter and impedance-guidewire systems that, by applying impedance technology and the principles of indicator dilution, are capable of measuring absolute coronary blood flow. For a flow indicator, we use 0.5 mL of glucose solution (D5W), which has little effect on intrinsic blood flow. The validity of this approach has been demonstrated in experimental and clinical studies. The impedance guidewire is less obstructive than the catheter system, so it probably will become the method with clinical application. (Texas Heart Institute Journal 1989;16:195-203) Images PMID:15227207

  13. Evaluation of the probe dihydrocalcein acetoxymethylester as an indicator of reactive oxygen species formation and comparison with oxidative DNA base modification determined by modified alkaline elution technique.

    PubMed

    Rohnstock, A; Lehmann, L

    2007-12-01

    Reactive oxygen species (ROS) play a predominant role in various diseases and the development of fast and easy methods for the quantification of intracellular ROS represents an important goal. Therefore, the aim of the present study was the evaluation of the fluorogenic probe dihydrocalcein acetoxymethylester (AM) for the detection of intracellular ROS. A flow cytometric method was developed using MCF-7 cells and the kinetics of ester hydrolysis and the cellular distribution and stability of calcein were characterized using calcein AM. Then, MCF-7 cells were challenged with model agents for the generation of singlet oxygen (illumination with visible light), peroxyl and hydroxyl radicals (tert-butylhydroperoxide, tBHP), superoxide anion radicals (potassium dioxide), and the intracellular formation of superoxide anion radicals by redox cycling (menadione) and the formation of calcein was compared with the induction of oxidative DNA base modifications assessed by modified alkaline elution technique. Every model agent significantly induced formamidopyrimidine-DNA glycosylase-sensitive sites (i.e. oxidative DNA base modifications) and most also induced DNA strand breaks. In contrast, exclusively tBHP and illumination with visible light induced the intracellular formation of calcein. In conclusion, though intracellular oxidation of dihydrocalcein represents a fast screening method, it detects a limited spectrum of ROS. PMID:17574384

  14. Total Pancreatectomy and Islet Auto-Transplantation in Children for Chronic Pancreatitis. Indication, Surgical Techniques, Post Operative Management and Long-Term Outcomes

    PubMed Central

    Chinnakotla, Srinath; Bellin, Melena D.; Schwarzenberg, Sarah J.; Radosevich, David M.; Cook, Marie; Dunn, Ty B.; Beilman, Gregory J.; Freeman, Martin L.; Balamurugan, A.N.; Wilhelm, Josh; Bland, Barbara; Jimenez-Vega, Jose M; Hering, Bernhard J.; Vickers, Selwyn M.; Pruett, Timothy L.; Sutherland, David E.R.

    2014-01-01

    Objective Describe the surgical technique, complications and long term outcomes of total pancreatectomy and islet auto transplantation (TP-IAT) in a large series of pediatric patients. Summary Background Data Surgical management of childhood pancreatitis is not clear; partial resection or drainage procedures often provide transient pain relief, but long term recurrence is common due to the diffuse involvement of the pancreas. Total pancreatectomy (TP) removes the source of the pain, while islet auto transplantation (IAT) potentially can prevent or minimize TP-related diabetes. Methods Retrospective review of 75 children undergoing TP-IAT for chronic pancreatitis who had failed medical, endoscopic or surgical treatment between 1989–2012. Results Pancreatitis pain and the severity of pain statistically improved in 90% of patients after TP-IAT (p =<0.001). The relief from narcotics was sustained. Of the 75 patients undergoing TP-IAT, 31 (41.3%) achieved insulin independence. Younger age (p=0.032), lack of prior Puestow (p=0.018), lower body surface area (p=0.048), IEQ per Kg Body Weight (p=0.001) and total IEQ (100,000) (0.004) were associated with insulin independence. By multivariate analysis, 3 factors were associated with insulin independence after TP-IAT:(1) male gender, (2) lower body surface area and the (3) higher total IEQ per kilogram body weight. Total IEQ (100,000) was the single factor most strongly associated with insulin independence (OR = 2.62; p value < 0.001). Conclusions TP-IAT provides sustained pain relief and improved quality of life. The ? cell function is dependent on islet yield. TP-IAT is an effective therapy for children with painful pancreatitis that fail medical and or endoscopic management PMID:24509206

  15. Oxidation states of iron as an indicator of the techniques used to burn clays and handcraft archaeological Tupiguarani ceramics by ancient human groups in Minas Gerais, Brazil

    NASA Astrophysics Data System (ADS)

    Floresta, D. L.; Ardisson, J. D.; Fagundes, M.; Fabris, J. D.; Macedo, W. A. A.

    2014-01-01

    Ceramics of the Tupiguarani Tradition typically have in common the burning characteristics, their forms and decoration motifs. Dating such ceramic pieces with the radiocarbon method indicate that these artifacts were probably handcrafted between 1,500 and 500 years before the present. Fragments ceramic utensils were collected in the archaeological site of Beltrão, in the municipality of Corinto, state of Minas Gerais, Brazil. A fragment of about 50 mm in diameter and 15 mm thick, with a color gradation across the ceramic wall ranging from red, on one side, grayish, in the middle, and orange, on the opposite side, was selected for a more detailed examination. The fragment was transversely cut and a series of subsamples were separated from different points along the piece wall, in layer segments of ~3 mm. All subsamples were analyzed with Mössbauer spectroscopy at room temperature and 80 K. Results reveal that hematite is the magnetically ordered phase. A Fe2 + component (relative spectral area, 50 %) appears for the grayish subsample. According to these first results, the red subsample seems to be the side that had direct contact with fire used to burn the precursor clay in air. The grayish middle layer is probably due to the clay mixed with some ashes. Mössbauer data reveal that the orange layer, corresponding to the opposite side of the ceramic relatively to the direct fire, does contain about the same Fe2 + :Fe3 + ratio but much lower proportion of ?-Fe2O3 than the red layer.

  16. GIS modelling of seismic vulnerability of residential fabrics considering geotechnical, structural, social and physical distance indicators in Tehran city using multi-criteria decision-making (MCDM) techniques

    NASA Astrophysics Data System (ADS)

    Rezaie, F.; Panahi, M.

    2014-09-01

    The main issue in determining the seismic vulnerability is having a comprehensive view to all probable damages related to earthquake occurrence. Therefore, taking factors such as peak ground acceleration (PGA) in the time of earthquake occurrence, the type of structures, population distribution among different age groups, level of education, the physical distance to a hospitals (or medical care centers), etc. into account and categorized under four indicators of geotechnical, structural, social and physical distance to needed facilities and distance from dangerous ones will provide us with a better and more exact outcome. To this end in this paper using analytic hierarchy process (AHP), the amount of importance of criteria or alternatives are determined and using geographical information system (GIS), the vulnerability of Tehran metropolitan as a result of an earthquake, is studied. This study focuses on the fact that Tehran is surrounded by three active and major faults of the Mosha, North Tehran and Rey. In order to comprehensively determine the vulnerability, three scenarios are developed. In each scenario, seismic vulnerability of different areas in Tehran city is analysed and classified into four levels including high, medium, low and safe. The results show that regarding seismic vulnerability, the faults of Mosha, North Tehran and Rey respectively make 6, 16 and 10% of Tehran area highly vulnerable and also 34, 14 and 27% are safe.

  17. GIS modeling of seismic vulnerability of residential fabrics considering geotechnical, structural, social and physical distance indicators in Tehran using multi-criteria decision-making techniques

    NASA Astrophysics Data System (ADS)

    Rezaie, F.; Panahi, M.

    2015-03-01

    The main issue in determining seismic vulnerability is having a comprehensive view of all probable damages related to earthquake occurrence. Therefore, taking into account factors such as peak ground acceleration at the time of earthquake occurrence, the type of structures, population distribution among different age groups, level of education and the physical distance to hospitals (or medical care centers) and categorizing them into four indicators of geotechnical, structural, social and physical distance to needed facilities and from dangerous ones will provide us with a better and more exact outcome. To this end, this paper uses the analytic hierarchy process to study the importance of criteria or alternatives and uses the geographical information system to study the vulnerability of Tehran to an earthquake. This study focuses on the fact that Tehran is surrounded by three active and major faults: Mosha, North Tehran and Rey. In order to comprehensively determine the vulnerability, three scenarios are developed. In each scenario, seismic vulnerability of different areas in Tehran is analyzed and classified into four levels: high, medium, low and safe. The results show that, regarding seismic vulnerability, the faults of Mosha, North Tehran and Rey make, respectively, 6, 16 and 10% of Tehran highly vulnerable, while 34, 14 and 27% is safe.

  18. Community indicators

    PubMed Central

    Flynn, Andrea; Wells, Samantha

    2014-01-01

    Community indicators are used to assess the impact of alcohol on communities. This article reviews the main data sources for community indicators, discusses their strengths and limitations, and discusses indicators used in reference to four main topics relating to alcohol use and problems at the community level: alcohol use, patterns, and problems; alcohol availability; alcohol-related health outcomes/trauma; and alcohol-related crime and enforcement. It also reviews the challenges associated with collecting community indicator data, along with important innovations in the field that have contributed to better knowledge of how to collect and analyze community-level data on the impact of alcohol. PMID:24881322

  19. Determination of cytoplasmic calcium concentration in Dryopteris spores: a developmentally non-disruptive technique for loading of the calcium indicator fura-2

    NASA Technical Reports Server (NTRS)

    Scheuerlein, R.; Schmidt, K.; Poenie, M.; Roux, S. J.

    1991-01-01

    Germination of Dryopteris spores is mediated by the physiologically active, far-red-absorbing form of phytochrome, Pfr, and external Ca2+ is necessary for the transduction of the light signal. Because knowledge about the cytoplasmic calcium ion concentration, [Ca2+]i, is of great importance for understanding the role of calcium during signal transduction, this value was measured using fura-2 in fern spores undergoing the normal developmental progression into germination. Fura-2 was loaded into the spores by electroporation, which does not disrupt the normal process of germination. The intensity of the fluorescence emission of the loaded fura-2 was analysed by a microspectrophotometric assay of single spores, and successful loading could be obtained by the application of ten electrical pulses (field strength 7.5 kV cm-1, half-life (time constant) 230 microseconds). Fura-2 was alternately excited by light of wavelengths 355 and 385 nm through an inverted fluorescence microscope, and the emitted fura-2 fluorescence was collected by a silicon-intensified video camera. The cytoplasmic calcium ion concentration was calculated from the ratio of the camera output obtained for both wavelengths and displayed by a pseudo-color technique. Spores responded to changes of the extracellular Ca2+ concentration, and this observation is considered as evidence that fura-2 is loaded into the cytoplasm. The substitution of a low external [Ca2+] (1 mM ethyleneglycol-bis(2-aminoethylether)-N,N,N',N'-tetraacetic acid (EGTA)) by 1 mM CaCl2 caused a fast increase of [Ca2+]i from approx. 50 nM to above 500 nM. In contrast, the subsequent substitution of CaCl2 by EGTA decreased [Ca2+]i again below 100 nM within 0.5 h. Furthermore, the application of ionomycin could initiate a change in [Ca2+]i according to the Ca2+ gradient established between the extracellular medium and cytoplasm. In spores sown on a Ca(2+) -free medium, [Ca2+]i, analysed in a buffer containing EGTA, was found to be around 50 nM during the first days of cultivation, independent of the irradiation protocol. However, if spores were grown in darkness on a Ca(2+) -containing medium and analysed in EGTA, [Ca2+]i was significantly higher (> or = 500 nM). In red-light-irradiated spores, [Ca2+]i was found to decrease with increasing time after irradiation, and was determined to be less than 100 nM when analysis was done 44 h after germination was initiated by the light treatment.

  20. RBC indices

    MedlinePLUS

    ... hemoglobin concentration (MCHC); Mean corpuscular volume (MCV); Red blood cell indices ... hemoglobin. The MCV reflects the size of red blood cells. The MCH and MCHC reflect the hemoglobin content ...

  1. Radial Artery Coursing Behind the Biceps Brachii Tendon: Significance for the Transradial Catheterization and a Clinically Oriented Classification of the Radial Artery Variations

    SciTech Connect

    Jelev, L. Surchev, L.

    2008-09-15

    In routine clinical practice the variations of the radial artery are the main reason for technical failure during transradial catheterization. If these variations are well documented, however, they do not represent a problem in the transradial approach. Therefore, we report here a rare case of the radial artery which is very strange but potentially valuable for the clinical practice: it arises at a right angle from the brachial artery and passes behind the biceps brachii tendon. Based on our findings and on an extensive literature review, we propose for the first time a clinically oriented classification of the variations of the radial artery. This classification is related to the catheterization success at the usual access site of the radial artery at the wrist.

  2. Position indicator

    DOEpatents

    Tanner, David E. (Poway, CA)

    1981-01-01

    A nuclear reactor system is described in which a position indicator is provided for detecting and indicating the position of a movable element inside a pressure vessel. The movable element may be a valve element or similar device which moves about an axis. Light from a light source is transmitted from a source outside the pressure vessel to a first region inside the pressure vessel in alignment with the axis of the movable element. The light is redirected by a reflector prism to a second region displaced radially from the first region. The reflector prism moves in response to movement of the movable element about its axis such that the second region moves arcuately with respect to the first region. Sensors are arrayed in an arc corresponding to the arc of movement of the second region and signals are transmitted from the sensors to the exterior of the reactor vessel to provide indication of the position of the movable element.

  3. Image Fusion of Preprocedural CTA with Real-time Fluoroscopy to Guide Proper Hepatic Artery Catheterization During Transarterial Chemoembolization of Hepatocellular Carcinoma: A Feasibility Study

    SciTech Connect

    Bargellini, Irene Turini, Francesca; Bozzi, Elena; Lauretti, Dario; Cicorelli, Antonio; Lunardi, Alessandro; Cioni, Roberto; Bartolozzi, Carlo

    2013-04-15

    To assess feasibility of proper hepatic artery catheterization using a 3D model obtained from preprocedural computed tomographic angiography (CTA), fused with real-time fluoroscopy, during transarterial chemoembolization of hepatocellular carcinoma. Twenty consecutive cirrhotic patients with hepatocellular carcinoma undergoing transarterial chemoembolization were prospectively enrolled onto the study. The early arterial phase axial images of the preprocedural CTA were postprocessed on an independent workstation connected to the angiographic system (Innova 4100; GE Healthcare, Milwaukee, WI), obtaining a 3D volume rendering image (VR) that included abdominal aorta, splanchnic arteries, and first and second lumbar vertebrae. The VR image was manually registered to the real-time X-ray fluoroscopy, with the lumbar spine used as the reference. The VR image was then used as guidance to selectively catheterize the proper hepatic artery. The procedure was considered successful when performed with no need for intraarterial contrast injections or angiographic acquisitions. The procedure was successful in 19 (95 %) of 20 patients. In one patient, celiac trunk angiography was required for the presence of a significant ostial stenosis that was underestimated at computed tomography. Time for image reconstruction and registration was <10 min in all cases. The use of preprocedural CTA model with fluoroscopy enables confident and direct catheterization of the proper hepatic artery with no need for preliminary celiac trunk angiography, thus reducing radiation exposure and contrast media administration.

  4. Horner's syndrome in patients admitted to the intensive care unit that have undergone central venous catheterization: a prospective study.

    PubMed

    Butty, Z; Gopwani, J; Mehta, S; Margolin, E

    2016-01-01

    PurposeCentral venous catheterization (CVC) is estimated to be performed in millions of patients per year. Swan-Ganz catheters used for CVC are most often inserted into the internal jugular vein and during this procedure they may come into contact with the sympathetic chain. This study aims to determine the incidence of Horner's syndrome in patients admitted to intensive care unit that have undergone internal jugular CVC insertion during their admission and to determine whether ultrasonography-assisted insertion has decreased the frequency of this complication.Patients and methodsA total of 100 prospective patients admitted to the ICU were examined for the presence of anisocoria and ptosis after undergoing recent CVC. Presence of Horner's syndrome was confirmed by testing with 0.5% apraclonidine and looking for the reversal of anisocoria.ResultsFrequency of Horner's syndrome after CVC was 2% in a sample of 100 prospectively examined patients.ConclusionHorner's syndrome remains a relatively rare but definitive complication of CVC. ICU physicians should be educated about its existence and prevalence and ophthalmologists should inquire about any history of ICU admission necessitating CVC insertion in any patient presenting with Horner's syndrome. PMID:26381100

  5. The influence of patient size on dose conversion coefficients: a hybrid phantom study for adult cardiac catheterization

    NASA Astrophysics Data System (ADS)

    Johnson, Perry; Lee, Choonsik; Johnson, Kevin; Siragusa, Daniel; Bolch, Wesley E.

    2009-06-01

    In this study, the influence of patient size on organ and effective dose conversion coefficients (DCCs) was investigated for a representative interventional fluoroscopic procedure—cardiac catheterization. The study was performed using hybrid phantoms representing an underweight, average and overweight American adult male. Reference body sizes were determined using the NHANES III database and parameterized based on standing height and total body mass. Organ and effective dose conversion coefficients were calculated for anterior-posterior, posterior-anterior, left anterior oblique and right anterior oblique projections using the Monte Carlo code MCNPX 2.5.0 with the metric dose area product being used as the normalization factor. Results show body size to have a clear influence on DCCs which increased noticeably when body size decreased. It was also shown that if patient size is neglected when choosing a DCC, the organ and effective dose will be underestimated to an underweight patient and will be overestimated to an underweight patient, with errors as large as 113% for certain projections. Results were further compared with those published for a KTMAN-2 Korean patient-specific tomographic phantom. The published DCCs aligned best with the hybrid phantom which most closely matched in overall body size. These results highlighted the need for and the advantages of phantom-patient matching, and it is recommended that hybrid phantoms be used to create a more diverse library of patient-dependent anthropomorphic phantoms for medical dose reconstruction.

  6. Successful Ultrasound-Guided Femoral Nerve Blockade and Catheterization in a Patient with Von Willebrand Disease

    PubMed Central

    DiStefano, Youmna E.; Lazar, Michael D.

    2015-01-01

    Peripheral nerve blockade (PNB) is superior to neuraxial anesthesia and/or opioid therapy for perioperative analgesia in total knee replacement (TKR). Evidence on the safety of PNB in patients with coagulopathy is lacking. We describe the first documented account of continuous femoral PNB for perioperative analgesia in a patient with Von Willebrand Disease (vWD). Given her history of opioid tolerance and after an informative discussion, a continuous femoral PNB was planned for in this 34-year-old female undergoing TKR. A Humate-P intravenous infusion was started and the patient was positioned supinely. Using sterile technique with ultrasound guidance, a Contiplex 18 Gauge Tuohy needle was advanced in plane through the fascia iliaca towards the femoral nerve. A nerve catheter was threaded through the needle and secured without complications. Postoperatively, a levobupivacaine femoral catheter infusion was maintained, and twice daily Humate-P intravenous infusions were administered for 48 hours; enoxaparin thromboprophylaxis was initiated thereafter. The patient was discharged uneventfully on postoperative day 4. Given documentation of delayed, unheralded bleeding from PNB in coagulopathic patients, we recommend individualized PNB in vWD patients. Multidisciplinary team involvement is required to guide factor supplementation and thromboprophylaxis, as is close follow-up to elicit signs of bleeding throughout the delayed postoperative period. PMID:26113995

  7. Pathology of the lower nasolacrimal duct mucosa at multiple time points after lacrimal retrograde catheterization in rabbit.

    PubMed

    Ye, L; Peng, Y; Wang, Y; Zeng, K; Zhang, J X

    2015-01-01

    Lacrimal duct obstruction is a common eye disease, and obstruction of the nasolacrimal duct accounts for over 50% of these cases. Nasolacrimal duct obstruction is usually treated surgically. Lacrimal retrograde catheterization is a novel surgical approach with a high success rate and a relatively high recurrence rate. In this study, we examined the postoperative pathological changes in the lower nasolacrimal duct mucosa at multiple time points (2, 4, 6, 8, 10, 12, and 14 weeks) after retrograde lacrimal dilated drainage tube implantation in rabbits. One side of the nasolacrimal duct was obstructed in 14 rabbits. Compared to the control side, the 2-, 4-, 6-, and 8-week groups presented no obvious changes in hematoxylin and eosin (H&E)-stained tissue. The 10-week group presented isolated granulomas. The 12- and 14-week groups presented scattered granulomas. The granulomas were smaller and the density of fibroblasts was lower in the 12-week group compared with the 14-week group. Transforming growth factor-?1 immunohistochemistry resulted in strong immunoreactivity in the 14-week group and weak immunoreactivity in the 12-week group, and the difference was statistically significant (P < 0.05). Fibroblast apoptosis was observed in the 4- and 6-week groups, and disorganized fibers were observed in the 10-week group. Most fibroblasts in the 12- and 14-week groups were the active type with mechanocytes. Granulomas were induced after a long time by the implantation of silicone tubes in rabbits. Thus, recurrent obstructions of the nasolacrimal duct may be caused by granulomas, progressive fibrosis, and/or adhesion of the surrounding tissues. PMID:26214474

  8. Medical iPad use in the cardiac catheterization and echo laboratories.

    PubMed

    Lavi, Ifat; Malki, Guy; Kornowski, Ran

    2014-02-01

    The present study aims to describe a dedicated cardiac imaging application on a tablet and to assess the accuracy and reproducibility of this novel application for measurement on angiography and echocardiography data sets. Tablet devices have recently been used in radiological image interpretation and enable transfer of images. It allows the clinician to look up clinical information, search the Internet and communicate with colleagues and family. The study group consisted of 30 patients who had both echocardiographic and angiographic examinations. For each patient, a few measurements (i.e. length, area and angle) were performed using the iPad, and compared to the McKesson workstation, which is routinely used in the hospital. In order to show the equivalence between these two methods, a linear regression was fitted and the distribution of differences between measurements was examined. In addition, the variability of the measurements was compared between two different reviewers (inter-observer test) and between the measurements of the same reviewer at two different time settings (intra-observer test) by calculating the intraclass correlation coefficient (ICC). In all comparisons, the linear regression showed high correlation coefficient (r > 0.9), and the distribution of differences was around zero, implying that the two methods lead to equivalent results. The absolute mean difference between the two different observers demonstrated high agreement between the two observers' repeated measurements. The same conclusions can be deduced from the same observer's repeated measurements. The ICC indicates the resemblance between the two sets, and could be considered almost perfect (ICC > 0.968 for all cases). The newly developed cardiology iPad application offers the opportunity to accurately present the cardiac procedure in a visual, clear and professional manner. PMID:24337922

  9. Alternative technique for clot retrieval: The "tip of the iceberg" technique.

    PubMed

    Agid, Ronit; Power, Sarah

    2015-12-01

    We present a variation of the classical technique of stent retriever thrombectomy which we found helpful in two patients presenting with acute stroke. CT angiography in both patients demonstrated thrombus within a middle cerebral artery M2 branch. In both cases the occluded artery was not visualized on DSA and only the proximal tip of the clot could be seen as a filling defect "hanging" into the parent artery reminiscent of a "tip of an iceberg". Rather than selectively catheterizing the occluded branch we placed the stent retriever in the patent parent artery crossing only the tip of the clot. In both cases one pass of the stent retriever was sufficient to retrieve the whole clot by its tip and reopen the occluded branch. We suggest trying this technique whenever the clot is seated in the proximal part of a secondary branch such as an M2 segment of middle cerebral artery. This "tip of the iceberg" technique prevents the need to selectively catheterize the occluded branch which, if difficult, can prolong procedural and ischemic time. PMID:26472639

  10. Endovascular treatment of intracranial aneurysms: diversity in treatment techniques of varying anatomical presentations.

    PubMed

    Putu, Patriawan; Firman, Sitanggang; Ismail, Mohd Redzuan; Nik-Ismail, Nik Azuan; Yaacob, Nur Yazmin; Muda, Ahmad Sobri

    2014-01-01

    We discuss and illustrate various endovascular treatment options for intracranial aneurysms, to reflect common technique used in endovascular treatment of brain aneurysm. We select five cases of various aneurysm types to show assortments of endovascular treatment (EVT) are performed. Selective catheterization of the intracranial aneurysms and endovascular treatments are technically feasible, offering a viable alternative to the surgical approach. We discuss the radiographic features, clinical presentation, and strategies of endovascular treatment of intracranial aneurysms. PMID:24760813

  11. Comparison of Estimations Versus Measured Oxygen Consumption at Rest in Patients With Heart Failure and Reduced Ejection Fraction Who Underwent Right-Sided Heart Catheterization.

    PubMed

    Chase, Paul J; Davis, Paul G; Wideman, Laurie; Starnes, Joseph W; Schulz, Mark R; Bensimhon, Daniel R

    2015-12-01

    Cardiac output during right-sided heart catheterization is an important variable for patient selection of advanced therapies (cardiac transplantation and left ventricular assist device implantation). The Fick method to determine cardiac output is commonly used and typically uses estimated oxygen consumption (VO2) from 1 of 3 published empirical formulas. However, these estimation equations have not been validated in patients with heart failure and reduced ejection fraction (HFrEF). The objectives of the present study were to determine the accuracy of 3 equations for estimating VO2 compared with direct measurement of VO2 and determine the extent clinically significant error occurred in calculating cardiac output of patients with HFrEF. Breath-by-breath measurements of VO2 from 44 patients who underwent cardiac catheterization (66% men; age, 65 ± 11 years, left ventricular ejection fraction, 22 ± 6%) were compared with the derived estimations of LaFarge and Miettinen, Dehmer et al, and Bergstra et al. Single-sample t tests found only the mean difference between the estimation of LaFarge and Miettinen and the measured VO2 to be nonsignificant (-10.3 ml/min ± 6.2 SE, p = 0.053). Bland-Altman plots demonstrated unacceptably large limits of agreement for all equations. The rate of ?25% error in the equations by LaFarge and Miettinen, Dehmer et al, and Bergstra et al occurred in 11%, 23%, and 45% of patients, respectively. Misclassification of cardiac index derived from each equation for 2 clinically important classifications: cardiogenic shock-21%, 23%, and 32% and hypoperfusion-16%, 16%, and 25%; respectively. In conclusion, these findings do not support the use of these empiric formulas to estimate the VO2 at rest in patients with HFrEF who underwent right-sided heart catheterization. PMID:26443561

  12. Influence of Different Protocols of Urethral Catheterization after Pharmacological Induction (Ur.Ca.P.I.) on Semen Quality in the Domestic Cat.

    PubMed

    Cunto, M; Küster, D G; Bini, C; Cartolano, C; Pietra, M; Zambelli, D

    2015-12-01

    The aim of this study was to evaluate the influence that different protocols of urethral catheterization after pharmacological induction (Ur.Ca.P.I.) may have on the semen quality of the domestic cat. The study has been divided into two experiments: one in which different dosages of medetomidine administrated are evaluated and the second one in which the timing of the catheterization after pharmacological induction is tested. In the first experiment, 18 cats were sedated with the recommended dosage of medetomidine (130 ?g/kg i.m.) while the other 18 were sedated with a lower dose of the same drug (50 ?g/kg i.m.). In the second experiment, three groups were implemented, each containing 25 subjects. In group 1, the semen collection was performed immediately once the pharmacological effect of the drug was reached; in group 2, the semen collection was performed three times every 5 min after the pharmacological effect was reached; finally, in group 3, Ur.Ca.P.I. was performed 20 min after the pharmacological effect was reached. All the different protocols permitted sperm collection, nevertheless the first experiment showed a better quality in terms of volume, concentration, total number of spermatozoa (p < 0.01) and quality of the movement (motility p < 0.05 and forward progressive motility p < 0.01), using a high medetomidine dosage rather than 50 ?g/kg i.m. In the second experiment, forward motility was statistically higher (p < 0.01) in the first group and total volume was higher (p < 0.01) in the second and third group, while other parameters were statistically not different. Results suggest that a single catheterization immediately after the onset of the pharmacological effect leads to a good-quality semen with the lowest possibility of damaging the urethra and that a sedation with 130 ?g/kg of medetomidine leads to a better quality sperm collection than 50 ?g/kg does. PMID:26482317

  13. Pulmonary alveolar hemorrhage from a pulmonary artery false aneurysm after Swan-Ganz catheterization in a thoracic aortic aneurysm patient: a case report.

    PubMed

    Sugiyama, Daisuke; Ikeno, Shigeo; Tsuchihashi, Tetsuya; Yokota, Shigeru; Ina, Hiroaki; Kono, Tetsuya; Yamashita, Kunihiko; Kawamata, Mikito

    2014-11-01

    Pulmonary artery (PA) rupture caused by a PA Swan-Ganz catheter is a rare complication but remains fatal in almost 50% of cases. False aneurysm of the PA is a rare presentation of PA rupture and should be considered as a possible diagnosis in a patient with a new lung mass after PA catheterization. We present a case of sudden-onset pulmonary alveolar hemorrhage during cardiovascular surgery due to a traumatic PA false aneurysm. The Swan-Ganz catheter might have been displaced by the thoracic aortic aneurysm with displacement of the catheter causing the false aneurysm and bleeding. PMID:25473465

  14. [Current indications for intravenous numerical angiography in the study of the ilio-femoral axis].

    PubMed

    Raynaud, A; Seurot, M; Angel, C; Roth, J P; Gaux, J C

    1983-06-18

    A study of the arterial axis from the aortic bifurcation to the femoral bifurcation was conducted by intravenous digital angiography in 40 patients. In 92.5% of these, opacification and visualization of the arteries were good or excellent. In 12 out of 15 patients the images were judged to be of the same quality as those obtained by conventional arteriography. A limitation of the method is the size of the intensifying screen (23 cm), which only allows exploration of one segment at each injection. This, however, is a minor drawback when this technique is used for control examination after percutaneous angioplasty or to investigate an accident of catheterization. PMID:6224146

  15. Cardiac catheterization - discharge

    MedlinePLUS

    ... catheter was inserted into an artery in your groin or arm. Then it was carefully guided up ... You may feel pain in your groin or arm where the catheter was placed. You may also have some bruising around and below the incision that was made to ...

  16. Radial Artery Catheterization

    MedlinePLUS

    ... CIRCULATIONAHA.111.019802 Extract Free Figures Only Free » Full Text Free PDF Free PPT Slides of All Figures ... manager Request Permissions Metrics Total Downloads Abstract: 1684 Full-text: 80314 PDF: 3987 Citing Articles Load citing article ...

  17. Self catheterization - male

    MedlinePLUS

    ... is dry, store the catheter in a new plastic bag. Throw away the catheter when it becomes dry ... When away from your house, carry a separate plastic bag for storing used catheters. If possible, rinse the ...

  18. Safety after cardiac catheterization.

    PubMed

    Huber, Charlotte

    2009-08-01

    The Pennsylvania Patient Safety Authority's reporting system is a confidential, statewide Internet reporting system to which all Pennsylvania hospitals, outpatient-surgery facilities, and birthing centers, as well as some abortion facilities, must file information on medical errors. Safety Monitor is a column from the authority that informs nurses on issues that can affect patient safety and presents strategies they can easily integrate into practice. For more information on the authority, visit www.patientsafetyauthority.org. For the original article discussed in this column or for other articles on patient safety, click on "Patient Safety Advisories" and then "Advisory Library" in the left-hand navigation menu. PMID:19641415

  19. Urine culture - catheterized specimen

    MedlinePLUS

    ... you may feel pressure. If you have a urinary tract infection , you may have some pain when the catheter ... on their own If you might have a urinary tract infection If you cannot empty your bladder (urinary retention)

  20. Self catheterization - female

    MedlinePLUS

    ... steps to insert your catheter: Wash your hands well with soap and water. Collect your supplies: catheter (open and ready to ... may use cotton balls with mild soap and water. Rinse well and dry if you use soap and water. ...

  1. Relation of timing of cardiac catheterization to outcomes in patients with non-ST-segment elevation myocardial infarction or unstable angina pectoris enrolled in the multinational global registry of acute coronary events.

    PubMed

    Montalescot, Gilles; Dabbous, Omar H; Lim, Michael J; Flather, Marcus D; Mehta, Rajendra H

    2005-06-15

    We assessed whether timing of catheterization is associated with the type of non-ST-segment elevation acute coronary syndrome and/or outcome in patients who were enrolled in the Global Registry of Acute Coronary Events. Overall, 8,853 patients who had unstable angina pectoris or non-ST-elevation myocardial infarction were categorized according to timing of catheterization: expeditive (<24 hours), early (24 to 48 hours), and delayed (>48 hours). Patients in the delayed group were older, more frequently had previous myocardial infarction or stroke, and had a higher risk score compared with those in the expeditive and early groups (all p < or =0.001). Killip class IV at admission, non-ST-elevation myocardial infarction, and Q waves after the index electrocardiogram were more common in the expeditive group (all p <0.0001). Patients in the expeditive and early groups were treated more aggressively with medications than were those in the delayed group. The in-hospital composite end point (death, stroke, or major bleed) occurred most frequently in the expeditive group (expeditive 6.6%, early 3.9%, delayed 5.1%, p = 0.0005), as did in-hospital death (expeditive 3.5%, early 1.4%, delayed 2.0%, p <0.0001). The highest incidence of death during follow-up occurred in the delayed group (3.8% delayed vs 2.8% expeditive/early, p = 0.0210). Multivariate regression analysis suggested that expeditive catheterization was related to in-hospital death and death from time of catheterization to 6 months. We conclude that expeditive catheterization is associated with unstable presenting features that contribute significantly to the higher risk of death and death or myocardial infarction in hospital compared with patients who undergo later catheterization. PMID:15950559

  2. The intravaginal slingplasty operation, a minimally invasive technique for cure of urinary incontinence in the female.

    PubMed

    Petros, P P

    1996-11-01

    The aim was to evaluate the intravaginal slingplasty operation, a minimally invasive technique for cure of urinary incontinence. Fifty-four unselected patients, aged from 26 to 79 years, mainly with mixed incontinence symptoms, underwent this procedure. It works by tightening the suburethral vagina ('hammock'), and by creating an artificial pubourethral neoligament. Where indicated, repair of uterine prolapse (24 cases), or infracoccygeal sacropexy (17 cases) was also performed. Almost all patients were discharged on the day of, or day after surgery, without requirement for postoperative catheterization, and returned to fairly normal activities, including jobs, within 7 to 14 days. At a mean follow-up time of 15 months, the cure rates for preoperative symptoms were, frequency 88%, nocturia 77%, urge incontinence 89%, stress incontinence (SI) 85%, symptoms of abnormal emptying, 77%, and reduction of mean residual urine from 67.5 mL to 32 mL. The objective cure rate (exercise pad testing) for stress incontinence was 88.6%; taking the group as a whole, urine loss was reduced from a mean of 11.6 g preoperatively to a mean of 0.5 g postoperatively. Urodynamically diagnosed detrusor instability was not a predictor of surgical failure in this study. According to the concepts presented here, symptoms of urinary dysfunction are mainly symptomatic manifestations of abnormal laxity in the vagina or its supporting ligaments. The surgical methods used to correct these defects are fairly simple, safe and easily learnt by an practising gynaecologist. PMID:9006833

  3. Use of Genetically Encoded Calcium Indicators (GECIs) Combined with Advanced Motion Tracking Techniques to Examine the Behavior of Neurons and Glia in the Enteric Nervous System of the Intact Murine Colon

    PubMed Central

    Hennig, Grant W.; Gould, Thomas W.; Koh, Sang Don; Corrigan, Robert D.; Heredia, Dante J.; Shonnard, Matthew C.; Smith, Terence K.

    2015-01-01

    Genetically encoded Ca2+ indicators (GECIs) have been used extensively in many body systems to detect Ca2+ transients associated with neuronal activity. Their adoption in enteric neurobiology has been slower, although they offer many advantages in terms of selectivity, signal-to-noise and non-invasiveness. Our aims were to utilize a number of cell-specific promoters to express the Ca2+ indicator GCaMP3 in different classes of neurons and glia to determine their effectiveness in measuring activity in enteric neural networks during colonic motor behaviors. We bred several GCaMP3 mice: (1) Wnt1-GCaMP3, all enteric neurons and glia; (2) GFAP-GCaMP3, enteric glia; (3) nNOS-GaMP3, enteric nitrergic neurons; and (4) ChAT-GCaMP3, enteric cholinergic neurons. These mice allowed us to study the behavior of the enteric neurons in the intact colon maintained at a physiological temperature, especially during the colonic migrating motor complex (CMMC), using low power Ca2+ imaging. In this preliminary study, we observed neuronal and glial cell Ca2+ transients in specific cells in both the myenteric and submucous plexus in all of the transgenic mice variants. The number of cells that could be simultaneously imaged at low power (100–1000 active cells) through the undissected gut required advanced motion tracking and analysis routines. The pattern of Ca2+ transients in myenteric neurons showed significant differences in response to spontaneous, oral or anal stimulation. Brief anal elongation or mucosal stimulation, which evokes a CMMC, were the most effective stimuli and elicited a powerful synchronized and prolonged burst of Ca2+ transients in many myenteric neurons, especially when compared with the same neurons during a spontaneous CMMC. In contrast, oral elongation, which normally inhibits CMMCs, appeared to suppress Ca2+ transients in some of the neurons active during a spontaneous or an anally evoked CMMC. The activity in glial networks appeared to follow neural activity but continued long after neural activity had waned. With these new tools an unprecedented level of detail can be recorded from the enteric nervous system (ENS) with minimal manipulation of tissue. These techniques can be extended in order to better understand the roles of particular enteric neurons and glia during normal and disordered motility. PMID:26617487

  4. Right ventricle functional assessment: have new techniques supplanted the old faithful conductance catheter?

    PubMed

    McCabe, Colm; White, Paul A; Rana, Bushra S; Gopalan, Deepa; Agrawal, Bobby; Pepke-Zaba, Joanna; Hoole, Stephen P

    2014-01-01

    This review explores the historical development of conductance catheterization of the human right ventricle (RV) and its current diagnostic role in assessing RV function in an era of contemporary noninvasive imaging. Significant advances in echocardiography, cardiothoracic computed tomography, and cardiac magnetic resonance in the last decade have led a paradigm shift away from invasive hemodynamic assessment toward noninvasive measurement of RV function. However, imaging modalities are not without some disadvantages. For example, they do not provide the beat-to-beat pressure-volume assessment that is obtained by conductance catheterization, which is still arguably the gold standard for measuring cardiac performance. Right heart catheterization remains an integral part of the assessment of patients with RV dysfunction, and a burgeoning interest in early RV insufficiency in a range of cardiopulmonary diseases has brought the detailed interrogation of RV function back into focus. Although conductance volume assessment of the RV is more limited than the left ventricle, the scope for improving the understanding of RV adaptation to pulmonary and valvular pathologies and RV myocardial disease by using a conductance catheter still exists. We review the up-to-date functional applications of echocardiography and computed tomography/cardiac magnetic resonance to assess the RV and illustrate the potential of contemporary conductance catheter techniques to complement noninvasive imaging in the assessment of RV function. PMID:24621859

  5. A novel technique in the treatment of retroperitoneal lymphatic leakage: direct percutaneous embolization through the leakage pouch

    PubMed Central

    Dinç, Hasan; O?uz, ?ükrü; Sar?, Ahmet

    2015-01-01

    Lymphangiography and percutaneous embolization of injured lymphatics are minimally invasive and effective techniques for the diagnosis and treatment of thoracic and retroperitoneal lymphatic leaks. We present a 58-year-old man who had abdominal chylous collection developed after multiple abdominal surgeries. Retroperitoneal lymphatic duct leakage was detected by ultrasound-guided intranodal lymphangiography and treated successfully using computed tomography (CT)-guided transabdominal embolization with percutaneous N-butyl cyanoacrylate (NBCA) glue and percutaneous NBCA glue and coil embolization by directly catheterizing the leaking lymphatic channel through the chylous collection. To the best of our knowledge, this is the first report of a lymphatic leakage case treated by percutaneous direct catheterization and embolization of leaking lymphatic channels through the chylous fluid collection. PMID:26200485

  6. Virtual-Reality Simulator System for Double Interventional Cardiac Catheterization Using Fractional-Order Vascular Access Tracker and Haptic Force Producer

    PubMed Central

    Chen, Guan-Chun; Lin, Chia-Hung; Li, Chien-Ming; Hsieh, Kai-Sheng; Du, Yi-Chun; Chen, Tainsong

    2015-01-01

    This study proposes virtual-reality (VR) simulator system for double interventional cardiac catheterization (ICC) using fractional-order vascular access tracker and haptic force producer. An endoscope or a catheter for diagnosis and surgery of cardiovascular disease has been commonly used in minimally invasive surgery. It needs specific skills and experiences for young surgeons or postgraduate year (PGY) students to operate a Berman catheter and a pigtail catheter in the inside of the human body and requires avoiding damaging vessels. To improve the training in inserting catheters, a double-catheter mechanism is designed for the ICC procedures. A fractional-order vascular access tracker is used to trace the senior surgeons' consoled trajectories and transmit the frictional feedback and visual feedback during the insertion of catheters. Based on the clinical feeling through the aortic arch, vein into the ventricle, or tortuous blood vessels, haptic force producer is used to mock the elasticity of the vessel wall using voice coil motors (VCMs). The VR establishment with surgeons' consoled vessel trajectories and hand feeling is achieved, and the experimental results show the effectiveness for the double ICC procedures. PMID:26171419

  7. Underrated value of repeated right heart catheterization in pulmonary hypertension with heart failure—a case of persisted pulmonary arterial hypertension after treatment for biventricular failure

    PubMed Central

    Park, Shinhee; Yoon, Hee Young; Jeung, Soomin; Lee, Nah Kyum; Kim, Min-Seok; Ahn, Jung-Min; Kim, Dae-Hee

    2015-01-01

    Pulmonary hypertension (PH) is a common complication of left heart disease and its presence in patients with heart failure predicts worse clinical outcomes. Specific agents targeting pulmonary arterial hypertension (PAH) have been developed over the last few years, but the efficacy of these agents in pulmonary hypertension due to left heart disease (PH-LHD) is uncertain. We report a case of idiopathic pulmonary arterial hypertension (IPAH) initially presented with biventricular failure, which was misdiagnosed as PH-LHD. A 31-year-old man who had a history of recurrent hemoptysis was referred to our center with biventricular failure. Right heart catheterization (RHC) showed elevated mean pulmonary arterial pressure (mPAP) and pulmonary capillary wedge pressure (PCWP). He was diagnosed as having PH-LHD, specifically combined post-capillary and precapillary PH (CpcPH). We treated him for 2 years with diuretics, a beta blocker, an angiotensin-converting enzyme (ACE) inhibitor, and sildenafil, which was added to treat CpcPH. A follow-up echocardiography showed that biventricular function had improved, but not PH. A second RHC revealed elevated mPAP and normal PCWP, which made us change the diagnosis to IPAH. In conclusion, it is important to perform repeated RHC in CpcPH patients after the improvement of left heart dysfunction to distinguish CpcPH from IPAH. PMID:26623126

  8. Genetic determination of high-density lipoprotein-cholesterol and apolipoprotein A-1 plasma levels in a family study of cardiac catheterization patients

    SciTech Connect

    Prenger, V.L.; Beaty, T.H.; Kwiterovich, P.O. )

    1992-11-01

    Plasma levels of two lipoprotein risk factors, high-density lipoprotein-cholesterol (HDL-C) and apolipoprotein A-1 (apo A-1), have been shown to be negatively associated with the risk of developing coronary artery disease, and several reports have examined familial factors in HDL-C and apo A-1 levels. A number of studies suggest that shared genes influence familial resemblance of these lipoprotein levels far more than do shared environments. Possible mechanisms for the inheritance of these risk factors (HDL-C and apo A-1 plasma levels) are explored using data from 390 individuals in 69 families ascertained through probands undergoing diagnostic cardiac catheterization. Segregation analysis was used to test a series of specific models of inheritance. Evidence for single-locus control of apo A-1 levels, with Mendelian transmission of a dominant allele leading to elevated apo A-1 levels, was seen in these families, although there was additional correlation among sibs present. This locus accounted for 48.6% and 37.2% of the total variation in apo A-1 levels in males and females, respectively. Similar evidence of segregation at a single locus controlling HDL-C levels was not seen in these families. 27 refs., 3 figs., 5 tabs.

  9. Virtual-Reality Simulator System for Double Interventional Cardiac Catheterization Using Fractional-Order Vascular Access Tracker and Haptic Force Producer.

    PubMed

    Chen, Guan-Chun; Lin, Chia-Hung; Li, Chien-Ming; Hsieh, Kai-Sheng; Du, Yi-Chun; Chen, Tainsong

    2015-01-01

    This study proposes virtual-reality (VR) simulator system for double interventional cardiac catheterization (ICC) using fractional-order vascular access tracker and haptic force producer. An endoscope or a catheter for diagnosis and surgery of cardiovascular disease has been commonly used in minimally invasive surgery. It needs specific skills and experiences for young surgeons or postgraduate year (PGY) students to operate a Berman catheter and a pigtail catheter in the inside of the human body and requires avoiding damaging vessels. To improve the training in inserting catheters, a double-catheter mechanism is designed for the ICC procedures. A fractional-order vascular access tracker is used to trace the senior surgeons' consoled trajectories and transmit the frictional feedback and visual feedback during the insertion of catheters. Based on the clinical feeling through the aortic arch, vein into the ventricle, or tortuous blood vessels, haptic force producer is used to mock the elasticity of the vessel wall using voice coil motors (VCMs). The VR establishment with surgeons' consoled vessel trajectories and hand feeling is achieved, and the experimental results show the effectiveness for the double ICC procedures. PMID:26171419

  10. A novel transurethral resection technique for superficial flat bladder tumor: Grasp and bite technique

    PubMed Central

    Oh, Kyung Jin; Choi, Yoo-Duk; Chung, Ho Suck; Hwang, Eu Chang; Jung, Seung Il; Kwon, Dong Deuk

    2015-01-01

    Purpose Transurethral resection of bladder tumor (TURBT) can be a challenging procedure for an inexperienced surgeon. We suggest an easy technique for TURBT, which we have named the "grasp and bite" technique. We describe this technique and compare its effectiveness and safety with that of conventional TURBT. Materials and Methods Monopolar TURBT (24-Fr Karl Storz) was performed in 35 patients who had superficial bladder tumors. After defining the tumor margin, the tumor and surrounding mucosa were grasped by use of a loop electrode and resectoscope sheath. With tight grasping, linear moving resection was performed. The patients' demographic, intraoperative, and postoperative data were analyzed between the conventional and grasp and bite TURBT groups. Results Of 35 patients, 16 patients underwent conventional TURBT (group 1), and the other 19 patients underwent grasp and bite TURBT (group 2). Both groups were similar in age, tumor multiplicity, size, anesthesia method, and location. Grasp and bite TURBT could be performed as safely and effectively as conventional TURBT. There were no significant differences in irrigation duration, urethral catheterization, postoperative hemoglobin drop, or length of hospital stay. No significant side effects such as bladder perforation, severe obturator reflex, or persistent bleeding occurred. There were no significant pathological differences between specimens according to the type of resection technique. Conclusions The grasp and bite TURBT technique was feasible for superficial bladder tumors. It may be a good tool for inexperienced surgeons owing to its convenient and easy manner. PMID:25763127

  11. [sustainability indicators] : 2012 Description of indicator

    E-print Network

    of the total area of land in the Sunshine Coast Region available for agricultural production. Why for agricultural production. How is it measured? Data for this indicator have been sourced from the Australian related to the gross value of agricultural production is estimated for individual commodities

  12. Toward Master Social Indicators.

    ERIC Educational Resources Information Center

    Stanford Research Inst., Menlo Park, CA.

    This paper outlines an approach to devising master social indicators which reflect conditions in a major area of human concern. There are five principal sections: Section I is an introduction; Section II sketches a heuristic model for categorizing indicator concepts, and suggests how a hierarchically organized scheme of indicators can be…

  13. Risk Indicators Introduction

    E-print Network

    Neirotti, Juan Pablo

    1 Risk Indicators Introduction This paper is designed to prompt high-level discussion over potential indicators of the risk of the failure of a provider's quality assurance processes. It outlines Education (QAA) to determine such indicators some contextual considerations to their use in a `risk

  14. ECOLOGICAL INDICATOR OVERVIEW

    EPA Science Inventory

    The Ecological Indicator Program in NERL is developing indicators for two key purposes. The first is to characterize the biological condition of shallow streams and large rivers. The second is to develop diagnostic indicators to evaluate the causes of impairment to these commun...

  15. Flow characteristics of the proximal pulmonary arteries and vena cava in patients with chronic thromboembolic pulmonary hypertension: correlation between 3.0 T phase-contrast MRI and right heart catheterization

    PubMed Central

    Guo, Xiaojuan; Liu, Min; Ma, Zhanhong; Wang, Shuangkun; Yang, Yuanhua; Zhai, Zhenguo; Wang, Chen; Zhai, Renyou

    2014-01-01

    PURPOSE We aimed to determine the correlation between flow characteristics of the proximal pulmonary arteries and vena cava obtained by 3.0 T phase-contrast magnetic resonance imaging (MRI) and hemodynamic characteristics by right heart catheterization in patients with chronic thromboembolic pulmonary hypertension. MATERIALS AND METHODS Twenty consecutive patients with chronic thromboembolic pulmonary hypertension and 20 sex- and age-matched healthy volunteers were included prospectively. All patients and controls underwent phase-contrast MRI to determine the flow characteristics including peak velocity, mean velocity, and mean blood flow of the proximal pulmonary artery and vena cava. All patients underwent right heart catheterization to determine the hemodynamics. RESULTS Peak velocity and mean velocity of the proximal pulmonary artery were significantly lower in the patient group. In patients, both peak velocity and mean blood flow were sequentially decreased in the main pulmonary artery, left and right pulmonary arteries, and left and right interlobar pulmonary arteries. Inferior vena cava had higher peak velocity, mean velocity, and mean blood flow than superior vena cava. Peak velocity of the main pulmonary artery correlated with mean and diastolic pulmonary artery pressure. Peak velocity of both inferior and superior vena cava strongly correlated with the pulmonary vascular resistance index (PVRI) (r=?0.68, P < 0.001 and r=?0.74, P < 0.001, respectively). Mean velocity of the main pulmonary artery and right pulmonary artery strongly correlated with PVRI and mean pulmonary artery pressure. Mean velocity of the superior vena cava and mean blood flow of the main pulmonary artery strongly correlated with PVRI and right cardiac work index. CONCLUSION Blood flow in the proximal pulmonary artery and vena cava evaluated by phase-contrast MRI correlate with hemodynamic parameters of right heart catheterization and can be used to noninvasively evaluate the severity of chronic thromboembolic pulmonary hypertension and, potentially, to follow up the treatment response. PMID:25163757

  16. Energy-conservation indicators

    SciTech Connect

    Belzer, D.B.

    1982-06-01

    A series of Energy Conservation Indicators were developed for the Department of Energy to assist in the evaluation of current and proposed conservation strategies. As descriptive statistics that signify current conditions and trends related to efficiency of energy use, indicators provide a way of measuring, monitoring, or inferring actual responses by consumers in markets for energy services. Related sets of indicators are presented in some 30 one-page indicator summaries. Indicators are shown graphically, followed by several paragraphs that explain their derivation and highlight key findings. Indicators are classified according to broad end-use sectors: Aggregate (economy), Residential, Commercial, Industrial, and transportation. In most cases annual time series information is presented covering the period 1960 through 1981.

  17. Welding-Current Indicator

    NASA Technical Reports Server (NTRS)

    Hensley, Milton C.; Huston, Steven W.; Kroy, Ralph E.

    1990-01-01

    Light flashes on to indicate high current. Simple, inexpensive display circuit indicates when 3,000-A welding current flows in welding gun. Onset of welding current induces voltage and current in 1,000-turn, 28-gauge copper-wire coil. Single-transistor amplifier amplifies induced current, energizing light-emitting diode (LED) connected to collector of transistor. Light from LED gives simple, direct indication of welding current.

  18. Endoscopic papillectomy: The limits of the indication, technique and results

    PubMed Central

    Ardengh, José Celso; Kemp, Rafael; Lima-Filho, Éder Rios; dos Santos, José Sebastião

    2015-01-01

    In the majority of cases, duodenal papillary tumors are adenomas or adenocarcinomas, but the endoscopy biopsy shows low accuracy to make the correct differentiation. Endoscopic ultrasonography and endoscopic retrograde cholangiopancreatography are important tools for the diagnosis, staging and management of ampullary lesions. Although the endoscopic papillectomy (EP) represent higher risk endoscopic interventions, it has successfully replaced surgical treatment for benign or malignant papillary tumors. The authors review the epidemiology and discuss the current evidence for the use of endoscopic procedures for resection, the selection of the patient and the preventive maneuvers that can minimize the probability of persistent or recurrent lesions and to avoid complications after the procedure. The accurate staging of ampullary tumors is important for selecting patients to EP or surgical treatment. Compared to surgery, EP is associated with lower morbidity and mortality, and seems to be a preferable modality of treatment for small benign ampullary tumors with no intraductal extension. The EP procedure, when performed by an experienced endoscopist, leads to successful eradication in up to 85% of patients with ampullary adenomas. EP is a safe and effective therapy and should be established as the first-line therapy for ampullary adenomas. PMID:26265992

  19. Cobb's Red Cabbage Indicator.

    ERIC Educational Resources Information Center

    Cobb, Vicki

    1998-01-01

    Describes the use of an indicator made from the pigment in red cabbage. Cabbage is grated then soaked in water. When the water is a strong red, the cabbage is strained out. The cabbage-juice indicator is then used to test for acids and bases. Includes a list of good foods to test for acidity and alkalinity. (PVD)

  20. Retractable Visual Indicator Assembly

    NASA Technical Reports Server (NTRS)

    Hackler, George R. (Inventor); Gamboa, Ronald J. (Inventor); Dominquez, Victor (Inventor)

    1998-01-01

    A retractable indicator assembly may be mounted on a container which transmits air through the container and removes deleterious gases with an activated charcoal medium in the container. The assembly includes: an elongate indicator housing has a chamber therein; a male adaptor with an external threads is used for sealing engagement with the container; a plug located at the upper end of the housing; a housing that includes a transparent wall portion for viewing at least a portion of the chamber; a litmus indicator, moveable by a retractable rod from a retracted position within the container to an extended position within the chamber of the housing; and an outer housing that is secured to the upper end of the rod, and protects the indicator housing while the litmus indicator is in its normally retracted position. The assembly may be manually manipulated between its extended position wherein the litmus indicator may be viewed through the transparent wall of the indicator housing, and a retracted position wherein the outer housing encloses the indicator housing and engages the exterior of the container.

  1. Dark shading indicates shelving

    E-print Network

    Petta, Jason

    Dark shading indicates shelving for oversize books Campus Telephone N Nassau Street Studies Reading Room (SHS) History Reference Collection (SH) Graduate Study Graduate Study (SNE) Graduate Study Reading Room A-1D Reading Room A-1E A-18F A-17C Grey hatching indicates construction zone X 23

  2. School Readiness Indicator Items.

    ERIC Educational Resources Information Center

    Calkins, Julia; Ling, Thomson; Moore, Eric; Halle, Tamara; Hair, Beth; Moore, Kris; Zaslow, Marty

    This report provides a compilation of indicators of school readiness used in national, state, and local surveys in the United States, delineating the advantages and disadvantages for each indicator. The report begins with a legend to assist in interpreting the tables and includes contact information for national and state surveys. The remainder of…

  3. Carbon dioxide concentration indicator

    NASA Technical Reports Server (NTRS)

    King, P. H.

    1972-01-01

    Device will provide visual indication of concentration of carbon dioxide. It consists of small amounts of absorbent material contained in semipermeable membrane and device to detect color changes. Material will absorb quantity of carbon dioxide proportional to carbon dioxide concentration in atmosphere. Amount of absorption is indicated by color change.

  4. Treatment of High-Flow Vascular Malformations by Venous Embolization Aided by Flow Occlusion Techniques

    SciTech Connect

    Jackson, James E.; Mansfield, Averil O.; Allison, David J.

    1996-09-15

    Purpose: Transvenous embolization techniques may be helpful as alternatives to the arterial route when treating high-flow vascular malformations. We present our experience using these techniques in four patients. Methods: In one patient the venous portion of the arteriovenous malformation (AVM) was punctured directly; in the other three patients it was catheterized via a retrograde venous approach. Flow occlusion techniques were utilized in all patients during embolization, which was performed with absolute alcohol or N-butyl-2-cyanoacrylate.Results: Excellent clinical and angiographic results were obtained, with obliteration of arteriovenous shunting in all patients. There were no complications.Conclusion: The embolization of certain AVMs using a venous approach is a safe and effective treatment.

  5. Teaching Techniques 

    E-print Network

    Howard, Jeff W.

    2005-05-10

    that you know each member. Teaching Techniques Several teaching techniques are available: lecture, illus- trated talk, discussion, question and answer, demonstra- tion, work session or practical exercise, experimentation, tours and home visits..., and exhibits. Experience in the use of these techniques comes only with practice. 1. Lecture For this technique, the teacher usually speaks to groups from prepared notes without visual aids or opportunity for group questions. This method is useful when new...

  6. Tamper indicating bolt

    DOEpatents

    Blagin, Sergei V.; Barkanov, Boris P.

    2004-09-14

    A tamper-indicating fastener has a cylindrical body with threads extending from one end along a portion of the body, and a tamper indicating having a transducer for converting physical properties of the body into electronic data; electronics for recording the electronic data; and means for communicating the recorded information to a remote location from said fastener. The electronics includes a capacitor that varies as a function of force applied by the fastener, and non-volatile memory for recording instances when the capacitance varies, providing an indication of unauthorized access.

  7. Sustainability Indicators and Metrics

    EPA Science Inventory

    Sustainability is about preserving human existence. Indicators and metrics are absolutely necessary to provide at least a semi-quantitative assessment of progress towards or away from sustainability. Otherwise, it becomes impossible to objectively assess whether progress is bei...

  8. Industrial energy use indices 

    E-print Network

    Hanegan, Andrew Aaron

    2009-05-15

    Energy use index (EUI) is an important measure of energy use which normalizes energy use by dividing by building area. Energy use indices and associated coefficients of variation are computed for major industry categories ...

  9. Health expectancy indicators.

    PubMed Central

    Robine, J. M.; Romieu, I.; Cambois, E.

    1999-01-01

    An outline is presented of progress in the development of health expectancy indicators, which are growing in importance as a means of assessing the health status of populations and determining public health priorities. PMID:10083720

  10. ENVIRONMENTAL AND SOCIOECONOMIC INDICATORS

    E-print Network

    Pennycook, Steve

    between desirable features, costs, and feasibility often determine the choice of indicators. 4 Managed Feedstock Logistics Conversion Biofuel Distribution End use Resource conditions Fuel type Transport Storage Individual perspective: Feedstock production Feedstock Logistics Conversion to Biofuel Biofuel Logistics

  11. ENVIRONMENTAL PUBLIC HEALTH INDICATORS

    EPA Science Inventory

    Environmental Public Health Indicators (EPHIs), quantitative measures of health factors and environmental influences tracked over time, can be used to identify specific areas and populations for intervention and prevention efforts and to evaluate the outcomes of implemented polic...

  12. Dismantling techniques

    SciTech Connect

    Wiese, E.

    1998-03-13

    Most of the dismantling techniques used in a Decontamination and Dismantlement (D and D) project are taken from conventional demolition practices. Some modifications to the techniques are made to limit exposure to the workers or to lessen the spread of contamination to the work area. When working on a D and D project, it is best to keep the dismantling techniques and tools as simple as possible. The workers will be more efficient and safer using techniques that are familiar to them. Prior experience with the technique or use of mock-ups is the best way to keep workers safe and to keep the project on schedule.

  13. Indicator Systems and Evaluation

    NASA Technical Reports Server (NTRS)

    Canright, Shelley; Grabowski, Barbara

    1995-01-01

    Participants in the workshop session were actively engaged in a hands-on, minds-on approach to learning about indicators and evaluation processes. The six hour session was broken down into three two hour sessions. Each session was built upon an instructional model which moved from general understanding to specific IITA application. Examples and practice exercises served to demonstrate tand reinforce the workshop concepts. Each successive session built upon the previous session and addressed the major steps in the evaluation process. The major steps covered in the workshop included: project descriptions, writing goals and objectives for categories, determining indicators and indicator systems for specific projects, and methods and issues of data collection. The workshop served as a baseline upon which the field centers will build during the summer in undertaking a comprehensive examination and evaluation of their existing K-12 education projects.

  14. Enzymatic temperature change indicator

    DOEpatents

    Klibanov, Alexander M. (Newton, MA); Dordick, Jonathan S. (Iowa City, IA)

    1989-01-21

    A temperature change indicator is described which is composed of an enzyme and a substrate for that enzyme suspended in a solid organic solvent or mixture of solvents as a support medium. The organic solvent or solvents are chosen so as to melt at a specific temperature or in a specific temperature range. When the temperature of the indicator is elevated above the chosen, or critical temperature, the solid organic solvent support will melt, and the enzymatic reaction will occur, producing a visually detectable product which is stable to further temperature variation.

  15. Trends & Indicators: Enrollment Period

    ERIC Educational Resources Information Center

    Harney, John O.

    2011-01-01

    Since New England Board of Higher Education (NEBHE) began publishing tables and charts exploring "Trends & Indicators" in New England higher education more than a half-century ago, few figures have grabbed as much attention as college "enrollment" data. These local, state, regional and national data go beyond simple headcounts of students going to…

  16. Fluorescent Gage Indication

    NASA Technical Reports Server (NTRS)

    Barns, C. E.; Gilbaugh, B. L.; Gin, B.; Holt, W. L.; Lesak, P.; Mancini, R.; Spencer, H. F.

    1985-01-01

    Transfer of dye shows quality of contact between two mating parts. Mating parts checked for fit by spreading fluorescent dye on one, making brief light contact with other, and looking (under UV light) for transferred dye. Dye offers greater visibility under ultraviolet illumination, allowing better indication of how precisely parts match and what areas interfere.

  17. Dark shading indicates shelving

    E-print Network

    Petta, Jason

    Dark shading indicates shelving for oversize books Campus Telephone N Nassau Street Seminar Room Hellenic Studies Reading Room (SHS) History Reference Collection (SH) Graduate Study Graduate Study (SNE) Graduate Study Reading Room A-1D Reading Room A-1E Firestone Renovation Room A-19D A-18D A

  18. Landscape-based Indicators

    EPA Science Inventory

    The report is based on data and experience gained through the GLNPO-funded Great Lakes Coastal Wetland Consortium (GLCWC) and the EPA-STAR funded Great Lakes Ecological Indicators Project (GLEI). EPA-MED author Trebitz and other MED personnel were collaborators on the GLEI proje...

  19. Amniocentesis: indications and complications.

    PubMed

    Vrettos, A S; Koliopoulos, C; Panayotou, P P

    1975-02-01

    Transabdominal amniocentesis is described and our experience with this method is presented. No severe maternal complications were recorded. In two cases accidental puncture of fetal blood vessels in pregnancies over 40 weeks led to delivery by cesarean section. We believe that, although fetal complications are rare, the indications for amniocentesis should be significant enough to discount the hazards of the procedure. PMID:1116906

  20. Triboluminescent indicator system

    DOEpatents

    Goods, Steven H. (Livermore, CA); Dentinger, Paul M. (Sunol, CA); Whinnery, Jr., Leroy L. (Danville, CA)

    2003-06-24

    There is provided a light emitting device comprising a plurality of triboluminescent particles dispersed throughout a low density, frangible body and activated by rapidly crushing the body in order to transfer mechanical energy to some portion of the particles. The light emitted by these mechanically excited particles is collected and directed into a light conduit and transmitted to a detector/indicator means.

  1. [The hemodynamics of the lesser circulation and blood indices in rats under long-term high-altitude hypoxia].

    PubMed

    Razumnikova, O M; Shandaulov, A Kh; Mazhbich, B I

    1989-05-01

    Pulmonary hemodynamics in anesthetized rats was studied during long-term residence (2,5 and 10 months) at high altitude (3,200 m, Tien Shan). Transbronchial regional electroplethysmography and catheterization of pulmonary artery was used. It has been shown that at all periods of adaptation there was increased systolic pressure in pulmonary artery and practically unchanged diastolic one. Some regional redistributions of pulmonary blood flow and blood volume for five different lung parts were demonstrated. Hemoglobin content in erythrocytes was steadily increased while specific electric blood resistance, hematocrit, and number of erythrocytes did not change so significantly. The role of pulmonary arterial hypertension and changes of other studied indices of hemodynamics and red blood in adaptation to chronic high-altitude hypoxia are being discussed. PMID:2525407

  2. PARTICLE ASSOCIATION EFFECTS ON MICROBIAL INDICATOR CONCENTRATIONS AND CSO DISINFECTION

    EPA Science Inventory

    Combined sewer overflow (CSO) and wastewater disinfection effectiveness are evaluated by measuring microbial indicator concentrations before and after disinfection. The standard techniques for quantifying indicators are membrane filtration and multiple-tube fermentation/most pro...

  3. [Indications for parathyroidectomy].

    PubMed

    Oertli, D

    2007-06-13

    The standard of care for primary hyperparathyroidism is surgical removal of all hyperfunctional parathyroid tissue. In experienced hands, parathyroidectomy is successful in 95-99% of cases with a very low complication rate. Surgery is indicated for all patients with symptomatic primary hyperparathyroidism. Asymptomatic individuals should also be surgically treated when patients are younger than 50 years, have severe hypercalcemia, markedly reduced creatinine clearance and/or profound osteopenia (according to the NIH Consensus Conference 2002). A precise preoperative localisation of parathyroid adenomas using cervical ultrasound and Sestamibi scintigraphy enables to elect the minimally invasive parathyroidectomy in most of the cases. Nowadays, the former routine of open bilateral cervical exploration is indicated only if preoperative localisation was not successful and hyperplasia of all four parathyroid glands is anticipated. PMID:17616036

  4. LEADING WITH LEADING INDICATORS

    SciTech Connect

    PREVETTE, S.S.

    2005-01-27

    This paper documents Fluor Hanford's use of Leading Indicators, management leadership, and statistical methodology in order to improve safe performance of work. By applying these methods, Fluor Hanford achieved a significant reduction in injury rates in 2003 and 2004, and the improvement continues today. The integration of data, leadership, and teamwork pays off with improved safety performance and credibility with the customer. The use of Statistical Process Control, Pareto Charts, and Systems Thinking and their effect on management decisions and employee involvement are discussed. Included are practical examples of choosing leading indicators. A statistically based color coded dashboard presentation system methodology is provided. These tools, management theories and methods, coupled with involved leadership and employee efforts, directly led to significant improvements in worker safety and health, and environmental protection and restoration at one of the nation's largest nuclear cleanup sites.

  5. New indications for antidepressants.

    PubMed

    Schatzberg, A F

    2000-01-01

    The second and third generation of antidepressants, i.e., the selective serotonin reuptake inhibitors, nefazodone, venlafaxine, and mirtazapine, are proving to be useful in a variety of seemingly diverse disorders, including most anxiety disorders. In addition to receiving approval from the U.S. Food and Drug Administration (FDA) for major depressive disorder, some of the newer antidepressants have received FDA approval for other disorders, e.g., generalized anxiety disorder (venlafaxine), bulimia nervosa (fluoxetine), obsessive-compulsive disorder (fluvoxamine, paroxetine, sertraline, and fluoxetine), social phobia (paroxetine), panic disorder (sertraline, paroxetine), and posttraumatic stress disorder (sertraline). In controlled studies, these agents have also shown usefulness in premenstrual dysphoric disorder, borderline personality disorder, obesity, smoking cessation, and alcoholism. This article describes the new and potential indications for recently developed antidepressants and the studies that suggested these indications. PMID:10926050

  6. Indices of thyroid epidemiology

    PubMed Central

    Kalra, Sanjay; Kumar, Arun; Jarhyan, Prashant; Unnikrishnan, Ambika Gopalakrishnan

    2015-01-01

    This brief communication proposes various indices of epidemicity and endemicity which may be used to predict the future prevalence of hypothyroidism. Taking advantage of knowledge related to the natural progression of autoimmune thyroid disease, it uses data from two recent Indian epidemiological studies to assess the epidemicity or endemicity of thyroid disease in the country. The hypothesis generated in this communication will be of help to clinicians as well as policy makers.

  7. [French Society of Anesthesia and Intensive Care. Arterial catheterization and invasive measurement of blood pressure in anesthesia and intensive care in adults].

    PubMed

    1995-01-01

    A group of 13 experts appointed by the French Society of Anaesthesia and Intensive Care has produced the following guidelines for arterial catheterisation and invasive measurement of systemic arterial blood pressure in adults. Teflon or polyurethane catheters are recommended with a maximal size of 18 gauge for femoral and axillary arteries and 20 gauge for the others. For small arteries (radial and pedious arteries) a maximal length of 3-5 cm should be preferred. The benefit of heparin-coating is not documented. Incorporation of salts for radiopacity is useless and increases thrombogenicity. Use of a flush device with a constant flow of 2 mL.h-1 and a fast flush valve connected to normal saline under pressure is recommended. Manual intermittent flushing with a syringe is contra-indicated. Addition of heparin (2500 IU.500 mL-1 of flush solution) increases the duration of catheter patency and is recommended for catheterisations of more than 24 h duration. Ready for use devices are to be preferred. Distortion of pressure wave may be minimized by employing low volume, low compliance, low resistance devices. The number of connections should be as low as possible and all of Luer-lock type. The stopcocks should be clearly identified to minimize the risk of accidental intra-arterial injection. The device should be transparent for disclosure of bubbles, which lead to waveform distortion. For catheter placement the operator should follow the usual preparation as for any aseptic surgical procedure with cap, mask, gloves and sterile towel. The insertion site is prepped either with chlorhexidine or povidone-iodine. In the conscious patient, local anaesthesia by injection and/or topical application (EMLA) is recommended. Direct arterial puncture should be preferred rather than transfixion. Catheterisation of deep vessels is facilitated by Seldinger technique, which is recommended whatever the site of placement when long term monitoring and/or difficulties of insertion are foreseen. The radial artery is the site of choice for elective cases. The non-dominant hand should be preferred. Puncture must be preceded by assessment of adequacy of the collateral flow by the Alien test. The femoral artery is a valuable site for emergency situations. Before catheterisation, the artery should be auscultated for a murmur. Puncture of a vascular prosthesis is contra-indicated. The dressing should be changed every four days only. Sites of blood withdrawal should be manipulated with compresses soaked with chlorhexidine or povidone-iodine. The arterial catheter is only changed in case of evidence of local infection or ischaemia. The catheter removal should be considered as an aseptic surgical procedure. The catheter completeness has to be checked. A systematic culture of the catheter is not required. PMID:8572416

  8. Slickenside kinematic indicators

    NASA Astrophysics Data System (ADS)

    Doblas, Miguel

    1998-09-01

    A new classification of slickenside kinematic indicators is presented based on 61 criteria. These slickensides have been subdivided into eleven major groups: `V' or crescentic markings, steps, fractures, trains of inclined planar structures, trailed material, asymmetric elevations, deformed elements, mineralogical/crystallographic orientations, asymmetric plan-view features, asymmetric cavities, and asymmetric folds. This classification constitutes a useful tool for geologists interested in the determination of the shear sense in fault surfaces bearing slickensides. Examples of application of this classification to natural fault surfaces at different scales are presented.

  9. Tamper-indicating seal

    DOEpatents

    Fiarman, S.; Degen, M.F.; Peters, H.F.

    1982-08-13

    There is disclosed a tamper-indicating seal that permits in the field inspection and detection of tampering. Said seal comprises a shrinkable tube having a visible pattern of markings which is shrunk over th item to be sealed, and a second transparent tube, having a second visible marking pattern, which is shrunk over the item and the first tube. The relationship between the first and second set of markings produces a pattern so that the seal may not be removed without detection. The seal is particularly applicable to UF/sub 6/ cylinder valves.

  10. Stapedectomy technique.

    PubMed

    House, J W

    1993-06-01

    This article reviews the evolution of the author's stapedectomy technique from total footplate removal with single loop wire prosthesis and Gelfoam seal to small fenestra stapedectomy with platinum ribbon piston prosthesis and blood seal. The author concludes that the microdrill is effective, safe, and cost effective for performing this procedure. Since using this technique, the author has had no cases of sensorineural hearing loss and few complaints of dizziness or vertigo. PMID:8341570

  11. Tamper indicating packaging

    SciTech Connect

    Baumann, M.J.; Bartberger, J.C.; Welch, T.D.

    1994-08-01

    Protecting sensitive items from undetected tampering in an unattended environment is crucial to the success of non-proliferation efforts relying on the verification of critical activities. Tamper Indicating Packaging (TIP) technologies are applied to containers, packages, and equipment that require an indication of a tamper attempt. Examples include: the transportation and storage of nuclear material, the operation and shipment of surveillance equipment and monitoring sensors, and the retail storage of medicine and food products. The spectrum of adversarial tampering ranges from attempted concealment of a pin-hole sized penetration to the complete container replacement, which would involve counterfeiting efforts of various degrees. Sandia National Laboratories (SNL) has developed a technology base for advanced TIP materials, sensors, designs, and processes which can be adapted to various future monitoring systems. The purpose of this technology base is to investigate potential new technologies, and to perform basic research of advanced technologies. This paper will describe the theory of TIP technologies and recent investigations of TIP technologies at SNL.

  12. Breathiness in Indic languages

    NASA Astrophysics Data System (ADS)

    Esposito, Christina; Khan, Sameeruddowla; Hurst, Alex

    2005-04-01

    Previous work on breathiness in Indic languages has focused on the acoustic properties of breathy oral stops in languages like Hindi ([bal] hair versus [bhal] forehead) or Bengali ([baSa] house versus [bhaSa] language). However, breathiness in Indic languages often extends to nasals (e.g., Marathi ([maar] beat versus [mhaar] a caste). It is unclear if languages such as Hindi and Bengali have breathy nasals in addition to breathy oral stops. This study addresses the following questions: (1) Are breathy nasals (Nh) acoustically different from N+h sequences, both in languages where they are phonemic and ones where they are not? (2) In sequences of a breathy stop and a modal nasal (e.g., Hindi [udhmi] naughty) where is the breathiness realized, if at all? To answer these questions, audio, aerodynamic, and electroglottographic recordings will be made of Hindi, Bengali, and Marathi speakers. It is hypothesized that acoustically breathy nasals in Hindi and Bengali will not be distinct from sequences of N+ h. We believe that this will also be true for the oral stops. In addition, it is believed that in sequences of breathy oral stop followed by a modal nasal (e.g., ChN), the breathiness will be produced on the nasal.

  13. Oxygen Detection via Nanoscale Optical Indicators

    E-print Network

    Ghosh, Ruby N.

    developed an optical technique for monitoring oxygen in both gas and liquid phases utilizing nanoscale metal. INTRODUCTION Real-time detection of oxygen in liquids and gases is important for a variety of chemicalOxygen Detection via Nanoscale Optical Indicators Ruby N. Ghosh Dept. of Physics Michigan State

  14. Decomposition techniques

    USGS Publications Warehouse

    Chao, T.T.; Sanzolone, R.F.

    1992-01-01

    Sample decomposition is a fundamental and integral step in the procedure of geochemical analysis. It is often the limiting factor to sample throughput, especially with the recent application of the fast and modern multi-element measurement instrumentation. The complexity of geological materials makes it necessary to choose the sample decomposition technique that is compatible with the specific objective of the analysis. When selecting a decomposition technique, consideration should be given to the chemical and mineralogical characteristics of the sample, elements to be determined, precision and accuracy requirements, sample throughput, technical capability of personnel, and time constraints. This paper addresses these concerns and discusses the attributes and limitations of many techniques of sample decomposition along with examples of their application to geochemical analysis. The chemical properties of reagents as to their function as decomposition agents are also reviewed. The section on acid dissolution techniques addresses the various inorganic acids that are used individually or in combination in both open and closed systems. Fluxes used in sample fusion are discussed. The promising microwave-oven technology and the emerging field of automation are also examined. A section on applications highlights the use of decomposition techniques for the determination of Au, platinum group elements (PGEs), Hg, U, hydride-forming elements, rare earth elements (REEs), and multi-elements in geological materials. Partial dissolution techniques used for geochemical exploration which have been treated in detail elsewhere are not discussed here; nor are fire-assaying for noble metals and decomposition techniques for X-ray fluorescence or nuclear methods be discussed. ?? 1992.

  15. Precipitation Indices Low Countries

    NASA Astrophysics Data System (ADS)

    van Engelen, A. F. V.; Ynsen, F.; Buisman, J.; van der Schrier, G.

    2009-09-01

    Since 1995, KNMI published a series of books(1), presenting an annual reconstruction of weather and climate in the Low Countries, covering the period AD 763-present, or roughly, the last millennium. The reconstructions are based on the interpretation of documentary sources predominantly and comparison with other proxies and instrumental observations. The series also comprises a number of classifications. Amongst them annual classifications for winter and summer temperature and for winter and summer dryness-wetness. The classification of temperature have been reworked into peer reviewed (2) series (AD 1000-present) of seasonal temperatures and temperature indices, the so called LCT (Low Countries Temperature) series, now incorporated in the Millennium databases. Recently we started a study to convert the dryness-wetness classifications into a series of precipitation; the so called LCP (Low Countries Precipitation) series. A brief outline is given here of the applied methodology and preliminary results. The WMO definition for meteorological drought has been followed being that a period is called wet respectively dry when the amount of precipitation is considerable more respectively less than usual (normal). To gain a more quantitative insight for four locations, geographically spread over the Low Countries area (De Bilt, Vlissingen, Maastricht and Uccle), we analysed the statistics of daily precipitation series, covering the period 1900-present. This brought us to the following definition, valid for the Low Countries: A period is considered as (very) dry respectively (very) wet if over a continuous period of at least 60 days (~two months) cq 90 days (~three months) on at least two out of the four locations 50% less resp. 50% more than the normal amount for the location (based on the 1961-1990 normal period) has been measured. This results into the following classification into five drought classes hat could be applied to non instrumental observations: Very wet period (+2): Wide scale river flooding, marshy acres and meadows.-Farmers cope with poor harvests of hay, grains, fruit etc. resulting in famines.-Late grape harvests, poor yield quantity and quality of wine. Wet period (+1): High water levels cq discharges of major rivers, tributaries and brooks, local river floodings, marshy acres and meadows in the low lying areas.-Wearisome and hampered agriculture. Normal (0) Dry period (-1): Low water levels cq discharges of major rivers, tributaries and brooks. Some brooks may dry up.-Summer half year: local short of yield of grass, hay and other forage.-Summer half year: moor-, peat- and forest fires. Very dry period (-2): Very low water levels cq discharges of major rivers and tributaries. Brooks and wells dry up. Serious shortage of drinking water; especially in summer.-Major agricultural damage, shortage of water, mortality stock of cattle. Shortage of grain. Flour can not be produced due to water mills running out of water, shortage of bread, bread riots, famines.-Large scale forest and peat areas, resulting in serious air pollution. Town fires. By verifying the historical evidence on these criterions, a series of 5 step indices ranging from very dry to very wet for summer and winter half year of the Low Countries was obtained. Subsequently these indices series were compared with the instrumentally observed seasonal precipitation sums for De Bilt (1735-2008), which is considered to be representative for the Central Netherlands. For winter (Oct-March) and summer half year (Apr.-Sept.) the accumulated precipitation amounts are calculated; these amounts are approximately normally distributed. Based on this distribution, the cumulative frequency distribution is calculated. By tabulating the number of summers in the pre-instrumental period 1201-1750 for each of the drought classes, a distribution is calculated which is then related to the modern accumulated precipitation distribution. Assuming that the accumulated precipitation amount has not been below (above) the mean precipitation minus (plus) three standard deviations for

  16. International energy indicators

    SciTech Connect

    Bauer, E.K.

    1981-02-01

    Extensive data are compiled for energy on the international scene and for the US. Data are indicated from the date given and into 1980 as far as available. Data are given for the international scene on: world crude oil production, 1975-to date; Iran: crude oil capacity, production, and shut-in, 1974-to date; Saudi Arabia: crude oil capacity, production, and shut-in, 1974-to date; OPEC (Ex-Iran and Saudi Arabia): capacity, production, and shut-in, 1974-to date; oil stocks: Free World, US, Japan, and Europe (landed), 1973-to date; petroleum consumption by industrial countries, 1973-to date; USSR crude oil production, 1974-to date; Free World and US nuclear generation capacity, 1973-to date. Data are supplied specifically for the US on US gross imports of crude oil and products, 1973-to date; landed cost of Saudi crude in current and 1974 dollars; US trade in bituminous coal, 1973-to date; summary of US merchandise trade, 1976-to date; and energy/GNP ratio.

  17. Entanglement-breaking indices

    NASA Astrophysics Data System (ADS)

    Lami, L.; Giovannetti, V.

    2015-09-01

    We study a set of new functionals (called entanglement-breaking indices) which characterize how many local iterations of a given (local) quantum channel are needed in order to completely destroy the entanglement between the system of interest over which the transformation is defined and an external ancilla. The possibility of contrasting the noisy effects introduced by the channel iterations via the action of intermediate (filtering) transformations is analyzed. We provide some examples in which our functionals can be exactly calculated. The differences between unitary and non-unitary filtering operations are analyzed showing that, at least for systems of dimension d larger than or equal to 3, the non-unitary choice is preferable (the gap between the performances of the two cases being divergent in some cases). For d = 2 (qubit case), on the contrary, no evidences of the presence of such gap is revealed: we conjecture that for this special case unitary filtering transformations are optimal. The scenario in which more general filtering protocols are allowed is also discussed in some detail. The case of a depolarizing noise acting on a two-qubit system is exactly solved in a general case.

  18. Aseptic technique.

    PubMed

    Bykowski, Tomasz; Stevenson, Brian

    2008-11-01

    This chapter describes common laboratory procedures that can reduce the risk of culture contaminations (sepsis), collectively referred as "aseptic technique." Two major strategies of aseptic work are described: using a Bunsen burner and a laminar flow hood. Both methods are presented in the form of general protocols applicable to a variety of laboratory tasks such as pipetting and dispensing aliquots, preparing growth media, and inoculating, passaging, and spreading microorganisms on petri dishes. PMID:19016438

  19. Electrochemical Techniques

    SciTech Connect

    Chen, Gang; Lin, Yuehe

    2008-07-20

    Sensitive and selective detection techniques are of crucial importance for capillary electrophoresis (CE), microfluidic chips, and other microfluidic systems. Electrochemical detectors have attracted considerable interest for microfluidic systems with features that include high sensitivity, inherent miniaturization of both the detection and control instrumentation, low cost and power demands, and high compatibility with microfabrication technology. The commonly used electrochemical detectors can be classified into three general modes: conductimetry, potentiometry, and amperometry.

  20. Should researchers use single indicators, best indicators, or multiple indicators in structural equation models?

    PubMed Central

    2012-01-01

    Background Structural equation modeling developed as a statistical melding of path analysis and factor analysis that obscured a fundamental tension between a factor preference for multiple indicators and path modeling’s openness to fewer indicators. Discussion Multiple indicators hamper theory by unnecessarily restricting the number of modeled latents. Using the few best indicators – possibly even the single best indicator of each latent – encourages development of theoretically sophisticated models. Additional latent variables permit stronger statistical control of potential confounders, and encourage detailed investigation of mediating causal mechanisms. Summary We recommend the use of the few best indicators. One or two indicators are often sufficient, but three indicators may occasionally be helpful. More than three indicators are rarely warranted because additional redundant indicators provide less research benefit than single indicators of additional latent variables. Scales created from multiple indicators can introduce additional problems, and are prone to being less desirable than either single or multiple indicators. PMID:23088287

  1. Pipeline Leak Detection Techniques

    E-print Network

    Chis, Timur

    2009-01-01

    Leak detection systems range from simple, visual line walking and checking ones to complex arrangements of hard-ware and software. No one method is universally applicable and operating requirements dictate which method is the most cost effective. The aim of the paper is to review the basic techniques of leak detection that are currently in use. The advantages and disadvantages of each method are discussed and some indications of applicability are outlined.

  2. Relationship of echocardiographic indices to pulmonary capillary wedge pressures in healthy volunteers

    NASA Technical Reports Server (NTRS)

    Firstenberg, M. S.; Levine, B. D.; Garcia, M. J.; Greenberg, N. L.; Cardon, L.; Morehead, A. J.; Zuckerman, J.; Thomas, J. D.

    2000-01-01

    OBJECTIVES: We sought to determine the relationship between different echocardiographic indices and pulmonary capillary wedge pressures (PCWP) in normal volunteers. BACKGROUND: Indices based on tissue Doppler (TDE) and color M-mode (CMM) echocardiography have been proposed to reflect left (LV) ventricular filling pressures. These include the ratio of early diastolic transmitral velocity (E) to early myocardial velocity measured by TDE (E') and the ratio of E to the wave propagation velocity (Vp) measured from CMM images. These indices, however, have not been validated in normal individuals. METHODS: We studied seven volunteers during two phases of preload altering maneuvers, baseline, with two stages of lower body negative pressure, and repeat baseline with two stages of volume loading. The PCWP obtained from right heart catheterization was compared with diastolic indices using pulsed Doppler, TDE and CMM echocardiography. RESULTS: The PCWP ranged from 2.2 to 23.5 mm Hg. During preload alterations, significant changes in E and septal E' (both p < 0.05) but not lateral E' or Vp were observed. Furthermore, E, septal E' and E/Vp correlated with PCWP (all r > 0.80) but not combined E and TDE indices (both r < 0.15). Within individuals, a similar linear relationship was observed among E/Vp, E and septal E' (average r > 0.80). CONCLUSIONS: In subjects without heart disease, E, septal E' and E/Vp correlate with PCWP. Because the influence of ventricular relaxation is minimized, the ratio E/Vp may be the best overall index of LV filling pressures.

  3. Edible Acid-Base Indicators.

    ERIC Educational Resources Information Center

    Mebane, Robert C.; Rybolt, Thomas R.

    1985-01-01

    Reports on the colors observed during titrations of 15 natural indicators obtained from common fruits and vegetables. These edible indicators can be used for a variety of teacher demonstrations or for simple student experiments. (JN)

  4. Fecal Indicator Bacteria and Environmental Observations: Validation of Virtual Beach

    EPA Science Inventory

    Contamination of recreational waters by fecal material is often assessed using indicator bacteria such as enterococci. Enumeration based on culturing methods can take up to 48 hours to complete, limiting the accuracy of water quality evaluations. Molecular microbial techniques em...

  5. Cook and Riggs General Purpose/ Uses of Chemical Indicators

    E-print Network

    Glaser, Rainer

    Indicator Dyes: Wolfbeis, Otto F. Optical Fiber Sensing 1997, 4, 53-107. (2) What is a Titration: Purdue. Department of Chemistry; Titration. http://chemed.chem. purdue.edu/genchem/lab/techniques/titration

  6. Catheterization of the Carotid Artery and Jugular Vein to Perform Hemodynamic Measures, Infusions and Blood Sampling in a Conscious Rat Model

    PubMed Central

    Feng, Jing; Fitz, Yvonne; Li, Yan; Fernandez, Melinda; Cortes Puch, Irene; Wang, Dong; Pazniokas, Stephanie; Bucher, Brandon; Cui, Xizhong; Solomon, Steven B.

    2015-01-01

    The success of a small animal model to study critical illness is, in part, dependent on the ability of the model to simulate the human condition. Intra-tracheal inoculation of a known amount of bacteria has been successfully used to reproduce the pathogenesis of pneumonia which then develops into sepsis. Monitoring hemodynamic parameters and providing standard clinical treatment including infusion of antibiotics, fluids and drugs to maintain blood pressure is critical to simulate routine supportive care in this model but to do so requires both arterial and venous vascular access. The video details the surgical technique for implanting carotid artery and common jugular vein catheters in an anesthetized rat. Following a 72 hr recovery period, the animals will be re-anesthetized and connected to a tether and swivel setup attached to the rodent housing which connects the implanted catheters to the hemodynamic monitoring system. This setup allows free movement of the rat during the study while continuously monitoring pressures, infusing fluids and drugs (antibiotics, vasopressors) and performing blood sampling. PMID:25741606

  7. Knowledge Discovery from Remotely Sensed Vegetation Indices

    NASA Astrophysics Data System (ADS)

    White, A. B.; Kumar, P.

    2002-12-01

    The objective of this research is to develop KDD (knowledge discovery in databases) techniques for spatio-temporal geo-data, and use these techniques to examine seasonal and inter-annual vegetation health signals. The underlying hypothesis of the research is that the signatures of inter-annual variability of climate on vegetation dynamics as represented by the statistical descriptors of vegetation index variations depend upon a variety of attributes related to the climate, physiography, topography, and hydrology. Several scientific questions related to the identification and characterization of the inter-annual variability ensue as a consequence of this hypothesis. Various vegetation indices will be enlisted to represent vegetation health, such as NDVI (normalized difference vegetation index), EVI (enhanced vegetation index), LAI (leaf area index), FPAR (fraction of photosynthetically active radiation), PSN (photosynthesis), and NPP (net primary product). Relationships between these indices and topography and its derivatives (slope, aspect, etc.), nearness to water bodies, precipitation, temperature, etc. will be analyzed. Preliminary investigations were performed using 13 years of 1 km resolution NDVI data from the AVHRR instrument on NOAA's POES (polar-orbiting operational environmental satellite). Deviations from the 13-year average were utilized in order to identify anomalous behavior. The pilot KDD technique includes distance-based clustering algorithms and Apriori association rule algorithms adapted for spatial-temporal data. Future work will incorporate more complex algorithms such as density-based clustering and constraint-based association mining algorithms.

  8. Validation of the use of photogrammetry to register pre-procedure MR images to intra-procedure patient position for image-guided cardiac catheterization procedures

    NASA Astrophysics Data System (ADS)

    Gao, Gang; Tarte, Segolene; King, Andy; Ma, Yingliang; Chinchapatnam, Phani; Schaeffter, Tobias; Razavi, Reza; Hawkes, Dave; Hill, Derek; Rhode, Kawal

    2008-03-01

    A hybrid X-ray and magnetic resonance imaging system (XMR) has been proposed as an interventional guidance for cardiovascular catheterisation procedure. However, very few hospitals can benefit from the XMR system because of its limited availability. In this paper we describe a new guidance strategy for cardiovascular catheterisation procedure. In our technique, intra-operative patient position is estimated by using a chest surface reconstructed from a photogrammetry system. The chest surface is then registered with the same surface derived from pre-procedure magnetic resonance (MR) images. The catheterisation procedure can therefore be guided by a roadmap derived from the MR images. Patients were required to hold the breath at end expiration during MRI acquisition. The surface matching accuracy is improved by using a robust trimmed iterative closest point (ICP) matching algorithm, which is especially designed for incomplete surface matching. Compared to the XMR system, the proposed guidance strategy is low cost and easy to set up. Experimental data were acquired from 6 volunteers and 1 patient. The patient data were collected during an electrophysiology procedure. In 6 out of 7 subjects, the experimental results show our method is accurate in term of reciprocal residual error (range from 1.66m to 3.75mm) and constant (closed-loop TREs range from 1.49mm to 3.55mm). For one subject, trimmed ICP failed to find the optimal transform matrix (residual = 4.89, TRE = 9.32) due to the poor quality of the photogrammetry-reconstructed surface. More studies are being carried on in clinical trials.

  9. Transurethral plasmakinetic resection of the prostate is a reliable minimal invasive technique for benign prostate hyperplasia: a meta-analysis of randomized controlled trials

    PubMed Central

    Wang, Kai; Li, Yao; Teng, Jing-Fei; Zhou, Hai-Yong; Xu, Dan-Feng; Fan, Yi

    2015-01-01

    To evaluate the efficacy and safety of plasmakinetic resection of the prostate (PKRP) versus transurethral resection of the prostate (TURP) for the treatment of patients with benign prostate hyperplasia (BPH), a meta-analysis of randomized controlled trials was carried out. We searched PubMed, Embase, Web of Science and the Cochrane Library. The pooled estimates of maximum flow rate, International Prostate Symptom Score, operation time, catheterization time, irrigated volume, hospital stay, transurethral resection syndrome, transfusion, clot retention, urinary retention and urinary stricture were assessed. There was no notable difference in International Prostate Symptom Score between TURP and PKRP groups during the 1-month, 3 months, 6 months and 12 months follow-up period, while the pooled Qmax at 1-month favored PKRP group. PKRP group was related to a lower risk rate of transurethral resection syndrome, transfusion and clot retention, and the catheterization time and operation time were also shorter than that of TURP. The irrigated volume, length of hospital stay, urinary retention and urinary stricture rate were similar between groups. In conclusion, our study suggests that the PKRP is a reliable minimal invasive technique and may anticipatorily prove to be an alternative electrosurgical procedure for the treatment of BPH. PMID:25337839

  10. Indicating the Attitudes of High School Students to Environment

    ERIC Educational Resources Information Center

    Ozkan, Recep

    2013-01-01

    Within this work in which it has been aimed to indicate the attitudes of High School Students to environment, indication of the attitudes of high school students in Nigde has been regarded as the problem matter. This analysis has the qualification of survey model and techniques of questionnaire and observation have been used. The investigation has…

  11. Identifying Quality Indicators of SAE and FFA: A Delphi Approach

    ERIC Educational Resources Information Center

    Jenkins, Charles Cordell, III; Kitchel, Tracy

    2009-01-01

    The purpose of this study was to determine quality indicators for SAE and FFA according to 36 experts across the United States. This is a part of a larger study looking at all components of the traditional three-circle model. The study utilized the Delphi technique to garner expert opinion about quality indicators in Agricultural Education. For…

  12. Non-thermal myocardial electrical conduction block by photosensitization reaction with catheterization in right atrium isthmus of porcine heart in vivo

    NASA Astrophysics Data System (ADS)

    Ito, Arisa; Kajihara, Takuro; Suenari, Tsukasa; Takahashi, Mei; Kimura, Takehiro; Fukumoto, Kotaro; Takatsuki, Seiji; Miyoshi, Shunichiro; Arai, Tsunenori

    2011-03-01

    We have studied a new type of myocardial catheter ablation with photosensitization reaction to realize non-thermal therapy for atrial arrhythmia, such as atrial fibrillation. Photochemically-generated reactive oxygen species may induce myocardial electrophysiological damage without heat generation. In this study, to demonstrate photosensitization reaction-induced myocardial electrical conduction block, the inferior vena cava to tricuspid annulus (IVC-TA) isthmus linear ablation was conducted with photosensitization reaction in porcine heart in vivo, using a newly developed laser catheter (7 Fr.). The end point of the procedure was the production of IVC-TA isthmus block under the electrophysiological analysis by diagnostic catheter with 10-bipole electrodes placed in right atrium along the isthmus. Talaporfin sodium (NPe6) as a photosensitizer was injected intravenously to pigs at 2.5-5.0 mg/kg. About 15 min after the injection, the laser light at the wavelength of 663 nm with a catheter output power density of 40-60 W/cm2 in about 1.4 mm spot size was irradiated through the laser catheter point by point in line crossing the isthmus under the fluoroscopic guidance. Before the photosensitization procedure, pacing signal from the distal electrodes of the diagnostic catheter, propagated through the isthmus in order. During the irradiation, electrical potential at the irradiated area was diminished. After the completion of the irradiation line, the bidirectional conduction block on the IVC-TA isthmus was validated by pacing from the distal and proximal bipole. These results indicated that photosensitization reaction could achieve the electrical conduction block of myocardial tissue immediately after the irradiation. We think that photosensitization reaction could become a novel therapy for atrial arrhythmia.

  13. Fit Indices Versus Test Statistics

    ERIC Educational Resources Information Center

    Yuan, Ke-Hai

    2005-01-01

    Model evaluation is one of the most important aspects of structural equation modeling (SEM). Many model fit indices have been developed. It is not an exaggeration to say that nearly every publication using the SEM methodology has reported at least one fit index. Most fit indices are defined through test statistics. Studies and interpretation of…

  14. CRITICAL EVALUATION OF ECOLOGICAL INDICATORS

    EPA Science Inventory

    EPA's Office of Research and Development (ORD) has prepared fifteen technical guidelines to evaluate the suitability of an ecological indicator in a monitoring program. The guidelines were fashioned to provide a consistent framework for indicator review and to provide guidance fo...

  15. Sustainability Indicators: A Scientific Assessment

    Technology Transfer Automated Retrieval System (TEKTRAN)

    The book entitled "Sustainability Indicators: A Scientific Assessment," which was a product of a multi-location research effort and workshoip held in Prague Czech Republic, is reviewed for readers of the Journal of Enviromental Quality (JEQ). The overview and chapters on biodiversity indicators and ...

  16. Quality Indicators for Learning Analytics

    ERIC Educational Resources Information Center

    Scheffel, Maren; Drachsler, Hendrik; Stoyanov, Slavi; Specht, Marcus

    2014-01-01

    This article proposes a framework of quality indicators for learning analytics that aims to standardise the evaluation of learning analytics tools and to provide a mean to capture evidence for the impact of learning analytics on educational practices in a standardised manner. The criteria of the framework and its quality indicators are based on…

  17. A Primer on Performance Indicators.

    ERIC Educational Resources Information Center

    Research File, 1995

    1995-01-01

    This report discusses the use of performance indicators (PIs) in higher education, focusing on definitions, frameworks, examples, and implications for universities. It notes that demands for accountability have led to intense interest in university performance measures, and that early indicators simply described the university or the system and…

  18. Science Indicators and Science Priorities.

    ERIC Educational Resources Information Center

    Brooks, Harvey

    1982-01-01

    Discusses science/society interface and difficulties involved in developing realistic science indicators. Topics include: intrinsic vs. extrinsic indicators; four problems society faces as a result of technological activities (toxic chemicals, radioactive wastes, auto safety, cancer); research and development (R&D) priorities; international…

  19. Image compression technique

    DOEpatents

    Fu, Chi-Yung (San Francisco, CA); Petrich, Loren I. (Livermore, CA)

    1997-01-01

    An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace's equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image.

  20. Image compression technique

    DOEpatents

    Fu, C.Y.; Petrich, L.I.

    1997-03-25

    An image is compressed by identifying edge pixels of the image; creating a filled edge array of pixels each of the pixels in the filled edge array which corresponds to an edge pixel having a value equal to the value of a pixel of the image array selected in response to the edge pixel, and each of the pixels in the filled edge array which does not correspond to an edge pixel having a value which is a weighted average of the values of surrounding pixels in the filled edge array which do correspond to edge pixels; and subtracting the filled edge array from the image array to create a difference array. The edge file and the difference array are then separately compressed and transmitted or stored. The original image is later reconstructed by creating a preliminary array in response to the received edge file, and adding the preliminary array to the received difference array. Filling is accomplished by solving Laplace`s equation using a multi-grid technique. Contour and difference file coding techniques also are described. The techniques can be used in a method for processing a plurality of images by selecting a respective compression approach for each image, compressing each of the images according to the compression approach selected, and transmitting each of the images as compressed, in correspondence with an indication of the approach selected for the image. 16 figs.

  1. Critical evaluation of the AE indices

    SciTech Connect

    Kroehl, H.W.

    1989-01-01

    The computation of the total eastward and westward auroral electrojets from numerical modeling techniques for three different intervals during disturbed conditions provides a unique opportunity to evaluate the accuracy of the standard Auroral Electrojet indices AU(12) and AL(12). The effect on the indices of replacing the local magnetic coordinate system with a global system, of increasing the latitudinal coverage by increasing the number of stations from 12 to 57, and of integrating the current density to obtain the total current is considered as new indices are correlated with the standard ones. We conclude that AL(12) is a reasonable measure of the westward electrojet current in a statistical sense, that Au(12) is not as good a measure of the eastward current, and that values of AU(12) and AL(12) during quiet conditions, i.e., less than 50 nT, must be treated separately from disturbed conditions. It should also be noted that a rotation of the perturbation vectors into a global coordinate system improves the indices more than an increase in the number of stations. Reprints. (rrh)

  2. Analyzing Crisis in Global Financial Indices

    NASA Astrophysics Data System (ADS)

    Kumar, Sunil; Deo, Nivedita

    We apply the Random Matrix Theory and complex network techniques to 20 global financial indices and study the correlation and network properties before and during the financial crisis of 2008 respectively. We find that the largest eigenvalue deviate significantly from the upper bound which shows a strong correlation between financial indices. By using a sliding window of 25 days we find that largest eigenvalue represent the collective information about the correlation between global financial indices and its trend indicate the market conditions. It is confirmed that eigenvectors corresponding to second largest eigenvalue gives useful information about the sector formation in the global financial indices. We find that these clusters are formed on the basis of the geographical location. The correlation network is constructed using threshold method for different values of threshold ? in the range 0 to 0.9, at ?=0.2 the network is fully connected. At ?=0.6, the Americas, Europe and Asia/Pacific form different clusters before the crisis but during the crisis Americas and Europe are strongly linked. If we further increase the threshold to 0.9 we find that European countries France, Germany and UK consistently constitute the most tightly linked markets before and during the crisis. We find that the structure of Minimum Spanning Tree before the crisis is more star like whereas during the crisis it changes to be more chain like. Using the multifractal analysis, we find that Hurst exponents of financial indices increases during the period of crisis as compared to the period before the crisis. The empirical results verify the validity of measures, and this has led to a better understanding of complex financial markets.

  3. Developing indicators for European birds

    PubMed Central

    Gregory, Richard D; van Strien, Arco; Vorisek, Petr; Gmelig Meyling, Adriaan W; Noble, David G; Foppen, Ruud P.B; Gibbons, David W

    2005-01-01

    The global pledge to deliver ‘a significant reduction in the current rate of biodiversity loss by 2010’ is echoed in a number of regional and national level targets. There is broad consensus, however, that in the absence of conservation action, biodiversity will continue to be lost at a rate unprecedented in the recent era. Remarkably, we lack a basic system to measure progress towards these targets and, in particular, we lack standard measures of biodiversity and procedures to construct and assess summary statistics. Here, we develop a simple classification of biodiversity indicators to assist their development and clarify purpose. We use European birds, as example taxa, to show how robust indicators can be constructed and how they can be interpreted. We have developed statistical methods to calculate supranational, multi-species indices using population data from national annual breeding bird surveys in Europe. Skilled volunteers using standardized field methods undertake data collection where methods and survey designs differ slightly across countries. Survey plots tend to be widely distributed at a national level, covering many bird species and habitats with reasonable representation. National species' indices are calculated using log-linear regression, which allows for plot turnover. Supranational species' indices are constructed by combining the national species' indices weighted by national population sizes of each species. Supranational, multi-species indicators are calculated by averaging the resulting indices. We show that common farmland birds in Europe have declined steeply over the last two decades, whereas woodland birds have not. Evidence elsewhere shows that the main driver of farmland bird declines is increased agricultural intensification. We argue that the farmland bird indicator is a useful surrogate for trends in other elements of biodiversity in this habitat. PMID:15814345

  4. Endocrine response of gilts to various common stressors: a comparison of indicators and methods of analysis.

    PubMed

    Merlot, E; Mounier, A M; Prunier, A

    2011-03-01

    The first aim of the present study was to determine whether various common events encountered by pigs in commercial farms or experimental units induce activation of the sympathetic and hypothalamo-pituitary-adrenal (HPA) axes. The second aim was to compare the efficiency of various indicators and methods of analysis to detect the occurrence of a stress reaction. Responses to two blood sampling methods, immobilization by snaring, brief electric shocks, loud noise, ear tagging, tattooing, biopsy, pen relocation or delayed feeding time have been evaluated. Series of blood and saliva samplings (from 10 min before to 120 min after stressor application) were collected for each stressor on a total of 8 catheterized sows. Plasma glucose, lactate, cortisol and ACTH levels as well as salivary cortisol were measured. Acute increases of cortisol or ACTH (at least at time points +5 or +15 min) were observed for intense noise, electric shocks, ear tagging, tattooing, biopsy, cava blood sampling, snaring and pen relocation. Snaring, relocation and vena cava blood sampling generated longer stress responses whereas delayed meal and tail blood sampling had no influence. Plasma lactate was also significantly increased in several time-points after stressor application contrarily to plasma glucose. Comparison of successive time points with the starting basal level and comparison with the control group were more sensitive methods to detect a stress response to moderate stressors like electric shocks and tattooing, than comparing the area under the curve. These data confirmed that salivary cortisol is a good indicator to measure the HPA response to a stressor, provided that post-treatment levels can be compared with pre-treatment levels. PMID:21109031

  5. COLIPHAGES AS INDICATORS OF ENTEROVIRUSES

    EPA Science Inventory

    Coliphages were monitored in conjunction with indicator bacteria and enteric viruses in a drinking water plant modified to reduce trihalomethane (THM) production. Coliphages could be detected in the source water by direct innoculation and sufficient coliphages were detected in en...

  6. Investigation of Some Metallochromic Indicators.

    ERIC Educational Resources Information Center

    Jones, A. V.; Nelson, M.

    1979-01-01

    Presents some introductory experiments involving the reaction between EDTA and several metal ions using metallochromic indicators. The experiments represent familiar reactions and are followed by suggestions for extension into areas of discovery work by students. (Author/SA)

  7. EVALUATION GUIDELINES FOR ECOLOGICAL INDICATORS

    EPA Science Inventory

    This document presents fifteen technical guidelines to evaluate the suitability of an ecological indicator for a particular monitoring program. The guidelines are organized within four evaluation phrases: conceptual relevance, feasibility of implementation, response variability...

  8. Nephroureteral Stents: Principles and Techniques

    PubMed Central

    Makramalla, Abouelmagd; Zuckerman, Darryl A.

    2011-01-01

    Nephroureteral stents including antegrade, retrograde, or internal (double-J) stents are routinely placed by interventional radiologists. The purpose of this review is to provide a detailed and comprehensive description of indications, contraindications, technique, and various technical challenges of these procedures. Also pre- and postprocedure management of patients will be discussed including routine follow-up and dealing with potential complications. PMID:23204635

  9. Weld width indicates weld strength

    NASA Technical Reports Server (NTRS)

    Nunes, A. C. J.; Novak, H. L.; Mcllwain, M. C.

    1982-01-01

    Width of butt weld in 2219-T87 aluminum has been found to be more reliable indicator of weld strength than more traditional parameters of power input and cooling rate. Yield stress and ultimate tensile strength tend to decrease with weld size. This conclusion supports view of many professional welders who give priority to weld geometry over welding energy or cooling rate as indicator of weld quality.

  10. Environmental indices in irrigation management.

    PubMed

    Manoliadis, O G

    2001-10-01

    Irrigation management calls for objective criteria capable of representing the economy, reliability, and productivity of irrigation systems. These criteria must be compatible with long-term sustainability and conservation goals. The criteria representing the above goals are the economic effect of management on yield reduction, economic effect, and reliability referring to plant growth and operation of the network. In this study environmental indices are introduced to express the above criteria in quantitative terms. The inclusion of these indices at the farm and network level create a multicriteria framework for decision-making based on composite programming. An experimental study was conducted during the irrigation periods of 1989 and 1990 in Chania, Greece, concerning water delivered to 40 experimental plots, soil moisture content at the rootzone, and irrigation system operational failures. The data collected in real time were used for the calculation of the corresponding environmental indices. The variation in time and space is high and resulted in up to 62% of yield loss and low system performance (up to 7% of system temporal reliability). The study indicated that environmental indices could be incorporated to select alternatives and also to develop policies on water delivery. The final decision involves a trade-off analysis between cost of application and desired system performance. Measures of both primary objectives can be obtained using environmental indices that represent system operation aggregation at its basic levels (on farm and network). PMID:11494068

  11. Energy Efficiency Indicators Methodology Booklet

    SciTech Connect

    Sathaye, Jayant; Price, Lynn; McNeil, Michael; de la rue du Can, Stephane

    2010-05-01

    This Methodology Booklet provides a comprehensive review and methodology guiding principles for constructing energy efficiency indicators, with illustrative examples of application to individual countries. It reviews work done by international agencies and national government in constructing meaningful energy efficiency indicators that help policy makers to assess changes in energy efficiency over time. Building on past OECD experience and best practices, and the knowledge of these countries' institutions, relevant sources of information to construct an energy indicator database are identified. A framework based on levels of hierarchy of indicators -- spanning from aggregate, macro level to disaggregated end-use level metrics -- is presented to help shape the understanding of assessing energy efficiency. In each sector of activity: industry, commercial, residential, agriculture and transport, indicators are presented and recommendations to distinguish the different factors affecting energy use are highlighted. The methodology booklet addresses specifically issues that are relevant to developing indicators where activity is a major factor driving energy demand. A companion spreadsheet tool is available upon request.

  12. Novel tamper-indicating protective devices

    SciTech Connect

    DeVolpi, A.

    1995-07-01

    Several novel tamper-indicating devices, originally developed under DOE auspices for arms control applications, might be useful in nonproliferation. Some devices that have reached the laboratory prototype stage could provide specialized alternatives to established seals. As locks and cables, the following might be useful: (1) a brittle ceramic lock--impervious to toxic, radiation, and thermal extremes--interrogated for identification and continuity by ultrasonic means, (2) a flexible ceramic-fiber seal that also tolerates severe environments, (3) an ultrasonic smart-material strip seal, and (4) an RF-resonant coaxial cable, verified by radio frequency and microwave signals. To validate the identity of secured surfaces, joints, welds, and fasteners--two techniques are applicable: (1) the scanning electron microscope, which examines three- dimensional micron-level topography, and (2) the plastic-casting fingerprint, a simple low-cost technique, analogous to human fingerprinting. The techniques mentioned above have one or more of the potential advantages of low cost, immediate availability, security for large-area enclosures, application to hazardous environments, usability in the FSU, or suitability for covert use.

  13. Behavioral indicators of pilot workload

    NASA Technical Reports Server (NTRS)

    Galanter, E.; Hochberg, J.

    1983-01-01

    Using a technique that requires a subject to consult an imagined or remembered spatial array while performing a visual task, a reliable reduction in the number of directed eye movements that are available for the acquisition of visual information is shown.

  14. Behavioral indicators of pilot workload

    NASA Technical Reports Server (NTRS)

    Galanter, E.; Hochberg, J.

    1984-01-01

    Using a technique that requires a subject to consult an imagined or remembered spatial array while performing a visual task, a reliable reduction in the number of directed eye movements that are available for the acquisition of visual information is shown.

  15. Scaling drug indication curation through crowdsourcing

    PubMed Central

    Khare, Ritu; Burger, John D.; Aberdeen, John S.; Tresner-Kirsch, David W.; Corrales, Theodore J.; Hirchman, Lynette; Lu, Zhiyong

    2015-01-01

    Motivated by the high cost of human curation of biological databases, there is an increasing interest in using computational approaches to assist human curators and accelerate the manual curation process. Towards the goal of cataloging drug indications from FDA drug labels, we recently developed LabeledIn, a human-curated drug indication resource for 250 clinical drugs. Its development required over 40?h of human effort across 20 weeks, despite using well-defined annotation guidelines. In this study, we aim to investigate the feasibility of scaling drug indication annotation through a crowdsourcing technique where an unknown network of workers can be recruited through the technical environment of Amazon Mechanical Turk (MTurk). To translate the expert-curation task of cataloging indications into human intelligence tasks (HITs) suitable for the average workers on MTurk, we first simplify the complex task such that each HIT only involves a worker making a binary judgment of whether a highlighted disease, in context of a given drug label, is an indication. In addition, this study is novel in the crowdsourcing interface design where the annotation guidelines are encoded into user options. For evaluation, we assess the ability of our proposed method to achieve high-quality annotations in a time-efficient and cost-effective manner. We posted over 3000 HITs drawn from 706 drug labels on MTurk. Within 8?h of posting, we collected 18 775 judgments from 74 workers, and achieved an aggregated accuracy of 96% on 450 control HITs (where gold-standard answers are known), at a cost of $1.75 per drug label. On the basis of these results, we conclude that our crowdsourcing approach not only results in significant cost and time saving, but also leads to accuracy comparable to that of domain experts. Database URL: ftp://ftp.ncbi.nlm.nih.gov/pub/lu/LabeledIn/Crowdsourcing/. PMID:25797061

  16. Council High LevelCouncil High Level IndicatorsIndicators

    E-print Network

    INDICATORS,, ContinuedContinued LifeLife--cycle mortalitycycle mortality ·· Life stage survival estimates accessible.Additional habitat made accessible. Water.Water. ·· Additional water available for fish,Additional water available for fish, anadromousanadromous and resident.and resident. Land.Land. ·· Additional land

  17. Indo-China monsoon indices.

    PubMed

    Tsai, ChinLeong; Behera, Swadhin K; Waseda, Takuji

    2015-01-01

    Myanmar and Thailand often experience severe droughts and floods that cause irreparable damage to the socio-economy condition of both countries. In this study, the Southeastern Asian Summer Monsoon variation is found to be the main element of interannual precipitation variation of the region, more than the El Niño/Southern Oscillation (ENSO). The ENSO influence is evident only during the boreal spring season. Although the monsoon is the major factor, the existing Indian Monsoon Index (IMI) and Western North Pacific Monsoon Index (WNPMI) do not correlate well with the precipitation variation in the study regions of Southern Myanmar and Thailand. Therefore, a new set of indices is developed based on the regional monsoon variations and presented here for the first time. Precipitation variations in Southern Myanmar and Thailand differ as well as the elements affecting the precipitation variations in different seasons. So, separate indices are proposed for each season for Southern Myanmar and Thailand. Four new monsoon indices based on wind anomalies are formulated and are named as the Indochina Monsoon Indices. These new indices correlate better with the precipitation variations of the study region as compared to the existing IMI and WNPMI. PMID:25630503

  18. Indo-China Monsoon Indices

    PubMed Central

    Tsai, ChinLeong; Behera, Swadhin K.; Waseda, Takuji

    2015-01-01

    Myanmar and Thailand often experience severe droughts and floods that cause irreparable damage to the socio-economy condition of both countries. In this study, the Southeastern Asian Summer Monsoon variation is found to be the main element of interannual precipitation variation of the region, more than the El Niño/Southern Oscillation (ENSO). The ENSO influence is evident only during the boreal spring season. Although the monsoon is the major factor, the existing Indian Monsoon Index (IMI) and Western North Pacific Monsoon Index (WNPMI) do not correlate well with the precipitation variation in the study regions of Southern Myanmar and Thailand. Therefore, a new set of indices is developed based on the regional monsoon variations and presented here for the first time. Precipitation variations in Southern Myanmar and Thailand differ as well as the elements affecting the precipitation variations in different seasons. So, separate indices are proposed for each season for Southern Myanmar and Thailand. Four new monsoon indices based on wind anomalies are formulated and are named as the Indochina Monsoon Indices. These new indices correlate better with the precipitation variations of the study region as compared to the existing IMI and WNPMI. PMID:25630503

  19. Gear selector indicator adjustment mechanism

    SciTech Connect

    Kobylarz, L.P.

    1989-04-18

    A motor vehicle automatic transmission gear selector indicator assembly is described which indicates the position of a gear shifter and permits the indicated gear position to be adjusted comprising: a display having gear selector designations and movable means for indicating one of the gear selector designations, and compliant means urging the movable means in one direction, a cable assembly having an outer sheath with first and second mounting means for mounting the opposite ends of the sheath, the cable assembly further having a cable core sliding within the sheath with a first end connected to the display movable means and a second end connected to the gear shifter, wherein tension on the core urges the indicator movable means to move against the compliant means, and an adjustment mechanism including a hollow externally threaded tube with the sheath fixed to the tube with the core passing through the tube, an adjustment wheel having a threaded bore meshing with the external threads of the tube, and a bracket which traps the adjustment wheel, the tube and the bracket including anti-rotation means for preventing rotation of the tube.

  20. Indo-China Monsoon Indices

    NASA Astrophysics Data System (ADS)

    Tsai, Chinleong; Behera, Swadhin K.; Waseda, Takuji

    2015-01-01

    Myanmar and Thailand often experience severe droughts and floods that cause irreparable damage to the socio-economy condition of both countries. In this study, the Southeastern Asian Summer Monsoon variation is found to be the main element of interannual precipitation variation of the region, more than the El Niño/Southern Oscillation (ENSO). The ENSO influence is evident only during the boreal spring season. Although the monsoon is the major factor, the existing Indian Monsoon Index (IMI) and Western North Pacific Monsoon Index (WNPMI) do not correlate well with the precipitation variation in the study regions of Southern Myanmar and Thailand. Therefore, a new set of indices is developed based on the regional monsoon variations and presented here for the first time. Precipitation variations in Southern Myanmar and Thailand differ as well as the elements affecting the precipitation variations in different seasons. So, separate indices are proposed for each season for Southern Myanmar and Thailand. Four new monsoon indices based on wind anomalies are formulated and are named as the Indochina Monsoon Indices. These new indices correlate better with the precipitation variations of the study region as compared to the existing IMI and WNPMI.

  1. Noncontacting devices to indicate deflection and vibration of turbopump internal rotating parts

    NASA Technical Reports Server (NTRS)

    Hamilton, D. B.; Ensminger, D.; Grieser, D. R.; Plummer, A. M.; Saccocio, E. J.; Kissel, J. W.

    1974-01-01

    Published report discusses feasibility of ultrasonic techniques; neutron techniques; X-radiography; optical devices; gamma ray devices; and conventional displacement sensors. Use of signal transmitters in place of slip rings indicated possible improvement and will be subject of futher study.

  2. Welfare indicators during broiler slaughtering.

    PubMed

    Grilli, C; Loschi, A R; Rea, S; Stocchi, R; Leoni, L; Conti, F

    2015-01-01

    1. The aim of this study was to identify the most relevant welfare indicators for unloading, lairage, stunning, killing and post-mortem inspection in a poultry slaughter plant. Different indicators were unloading duration, lairage time, environmental variables in the lairage facilities, shackling time and electrical variables used in the water bath. 2. Lairage time did not correlate strongly with dead on arrival. Heat stress was limited by means of ventilation systems, correct cage placement and appropriate stocking density per crate. The acceptable shackling period was about 30 s. 3. The presence of a corneal reflex showed that an animal was alive, while spontaneous wing flapping, spontaneous eye blinking and response to a painful stimulus were regarded as indicators of stunning efficiency. 4. It was concluded that the presence of recent traumatic injuries during the post-mortem inspection could be a valid means to establish whether corrective measures concerning the handling, transport and loading procedures should be taken. PMID:25567419

  3. Extreme temperature indices over Serbia

    NASA Astrophysics Data System (ADS)

    Tosic, I.; Unkasevic, M.

    2012-04-01

    In this work, the extreme climate indices based on the daily maximum and minimum temperatures during the period 1949-2009 at fifteen stations distributed across Serbia were analyzed. The following temperature indices were considered: cold nights (Tn10), cold days (Tx10), warm nights (Tn90), warm days (Tx90) and frost days (FD). The results showed seasonal changes in the minimum and maximum temperature extremes. The most significant trends of temperature indices were revealed for the summer season. According to the seasonal analysis of five temperature extreme indices, it was found that a warming tendency was dominant. Tendencies significant at the 5 % level were obtained during the spring (Tx10) and summer (Tn10, Tn90 and Tx90). The largest warming tendencies of greater than 1 day per decade were found for Tx90 and Tn90 in the summer. A cooling tendency was revealed only during the autumn for Tx10 and FD, suggesting a rise in the number of cold and frost days. An analysis of the extreme temperature indices suggested that the Serbian climate generally tended to become warmer in the last 61 years. To describe the link of the extreme temperature indices with the large-scale atmospheric circulations, indexes of teleconnection patterns, such as the North Atlantic Oscillation (NAO), East Atlantic (EA) and East Atlantic/West Russia (EA-WR) were investigated. It was found that the Tn90 and Tx90 values were highly positively correlated with the EA index during the winter, spring and summer, while Tx10 and Tn10 values were negatively correlated. The Tn10 value probably decreased because of the trend to more positive phases of the EA. Opposite correlations with the EA-WR were found for the Tn10 and Tn90 values in the autumn.

  4. Coronary physiology assessment in the catheterization laboratory

    PubMed Central

    Díez-delhoyo, Felipe; Gutiérrez-Ibañes, Enrique; Loughlin, Gerard; Sanz-Ruiz, Ricardo; Vázquez-Álvarez, María Eugenia; Sarnago-Cebada, Fernando; Angulo-Llanos, Rocío; Casado-Plasencia, Ana; Elízaga, Jaime; Fernández Avilés Diáz, Francisco

    2015-01-01

    Physicians cannot rely solely on the angiographic appearance of epicardial coronary artery stenosis when evaluating patients with myocardial ischemia. Instead, sound knowledge of coronary vascular physiology and of the methods currently available for its characterization can improve the diagnostic and prognostic accuracy of invasive assessment of the coronary circulation, and help improve clinical decision-making. In this article we summarize the current methods available for a thorough assessment of coronary physiology. PMID:26413229

  5. Coronary physiology assessment in the catheterization laboratory.

    PubMed

    Díez-Delhoyo, Felipe; Gutiérrez-Ibañes, Enrique; Loughlin, Gerard; Sanz-Ruiz, Ricardo; Vázquez-Álvarez, María Eugenia; Sarnago-Cebada, Fernando; Angulo-Llanos, Rocío; Casado-Plasencia, Ana; Elízaga, Jaime; Fernández Avilés Diáz, Francisco

    2015-09-26

    Physicians cannot rely solely on the angiographic appearance of epicardial coronary artery stenosis when evaluating patients with myocardial ischemia. Instead, sound knowledge of coronary vascular physiology and of the methods currently available for its characterization can improve the diagnostic and prognostic accuracy of invasive assessment of the coronary circulation, and help improve clinical decision-making. In this article we summarize the current methods available for a thorough assessment of coronary physiology. PMID:26413229

  6. Pathogenesis of infections related to intravascular catheterization.

    PubMed Central

    Goldmann, D A; Pier, G B

    1993-01-01

    Over the past few decades, there have been major technological improvements in the manufacture of intravenous solutions and the manufacture and design of catheter materials. However, the risk of infection in patients receiving infusion therapy remains substantial, in part because of host factors (for example, increased use of immunosuppressive therapy, more aggressive surgery and life support, and improved survival at the extremes of life) and in part because of the availability of catheters that can be left in place for very long periods. Microbial components of normal skin flora, particularly coagulase-negative staphylococci, have emerged as the predominant pathogens in catheter-associated infections. Therefore, efforts to prevent skin microorganisms from entering the catheter wound (such as tunnelling of catheters and use of catheter cuffs and local antimicrobial agents) are logical and relatively effective. The specific properties of microorganisms that transform normally harmless commensals such as coagulase-negative staphylococci into formidable pathogens in the presence of a plastic foreign body are being explored. For example, Staphylococcus epidermidis elaborates a polysaccharide adhesin that also functions as a capsule and is a target for opsonic killing. However, the interactions between microorganism and catheter that lead to adherence, persistence, infection, and dissemination appear to be multifactorial. Images PMID:8472248

  7. Brazing Alloys Indicate Turbomachinery Temperatures

    NASA Technical Reports Server (NTRS)

    Schlaff, J. W.

    1985-01-01

    Foils serve as consumable thermometers. Stainless-steel tab with circular window holds brazing-foil sample in place. Tab tacked to object to be tested with capacitive-discharge spot welder operating in range 10 + 1 joules. After measurements, tabs and samples chiseled off, leaving tested object fairly well intact. Technique used on objects made of alloys with iron, nickel, or cobalt as principal ingredients.

  8. America's Children: Key National Indicators

    E-print Network

    Rau, Don C.

    Development http://www.nichd.nih.gov Maternal and Child Health Bureau http://www.mchb.hrsa.gov National CenterAmerica's Children: Key National Indicators of Well-Being, 2013 Federal Interagency Forum on Child Interagency Forum on Child and Family Statistics #12;Federal Interagency Forum on Child and Family Statistics

  9. Developing Indicators of Student Coursework.

    ERIC Educational Resources Information Center

    McDonnell, Lorraine M.; Ormseth, Tor

    The School Reform Assessment (SRA) project began in 1987 with the objective of developing indicators of student coursework that reliably and validly measure this central feature of schooling, while remaining sensitive to major policy changes and the information needs of policymakers, and efficiently collecting and reporting data. This paper…

  10. Can biological indicators predict the

    E-print Network

    Cai, Long

    /TAXI/GETTY Psychiatry has long been a second-class citizen in science and medicine. Despite much effort, the causes biomarkers into psychiatry (Fig. 1), and there is hope that such biological indicators will improve, there has been little discussion of the social, ethical and legal problems posed by their use in psychiatry

  11. Proximity Indicator for Remote Manipulator

    NASA Technical Reports Server (NTRS)

    Bejczy, A. K.

    1985-01-01

    Display indicates pitch, yaw, and distance of remote manipulator with respect to object to be grasped. Displays numerical values and bargraph simulation of position and orientation of hand. When errors in position and orientation are small enough to ensure successful grasp, unit alerts operator with audible and visible signals.

  12. Social Indicators and Social Reporting

    ERIC Educational Resources Information Center

    Parke, Robert; Seidman, David

    1978-01-01

    Describes the several research traditions which combine to form the social indicators movement. All the traditions share concern for measurement, analysis, and reporting of aspects of social conditions to a general audience. Journal available from: American Academy of Political and Social Science, 3937 Chestnut Street, Philadelphia, Pennsylvania…

  13. Scale-Independent Bibliometric Indicators

    ERIC Educational Resources Information Center

    Katz, J. Sylvan

    2005-01-01

    This article presents the author's critique of Anthony F. J. van Raan's article titled, "Measurement of Central Aspects of Scientific Research: Performance, Interdisciplinarity, Structure." van Raan makes an excellent case for using bibliometric data to measure some central aspects of scientific research and to construct indicators of groups:…

  14. College Readiness Indicator Systems Framework

    ERIC Educational Resources Information Center

    Borsato, Graciela N.; Nagaoka, Jenny; Folley, Ellen

    2013-01-01

    A new framework from the CRIS initiative provides guidance for schools and districts to implement a system of indicators and supports for students who are off track for post-secondary success. The CRIS framework is intended as a tool to help districts and schools implement the conditions, processes, and supports needed to increase the number of…

  15. MSPI False Indication Probability Simulations

    SciTech Connect

    Dana Kelly; Kurt Vedros; Robert Youngblood

    2011-03-01

    This paper examines false indication probabilities in the context of the Mitigating System Performance Index (MSPI), in order to investigate the pros and cons of different approaches to resolving two coupled issues: (1) sensitivity to the prior distribution used in calculating the Bayesian-corrected unreliability contribution to the MSPI, and (2) whether (in a particular plant configuration) to model the fuel oil transfer pump (FOTP) as a separate component, or integrally to its emergency diesel generator (EDG). False indication probabilities were calculated for the following situations: (1) all component reliability parameters at their baseline values, so that the true indication is green, meaning that an indication of white or above would be false positive; (2) one or more components degraded to the extent that the true indication would be (mid) white, and “false” would be green (negative) or yellow (negative) or red (negative). In key respects, this was the approach taken in NUREG-1753. The prior distributions examined were the constrained noninformative (CNI) prior used currently by the MSPI, a mixture of conjugate priors, the Jeffreys noninformative prior, a nonconjugate log(istic)-normal prior, and the minimally informative prior investigated in (Kelly et al., 2010). The mid-white performance state was set at ?CDF = ?10 ? 10-6/yr. For each simulated time history, a check is made of whether the calculated ?CDF is above or below 10-6/yr. If the parameters were at their baseline values, and ?CDF > 10-6/yr, this is counted as a false positive. Conversely, if one or all of the parameters are set to values corresponding to ?CDF > 10-6/yr but that time history’s ?CDF < 10-6/yr, this is counted as a false negative indication. The false indication (positive or negative) probability is then estimated as the number of false positive or negative counts divided by the number of time histories (100,000). Results are presented for a set of base case parameter values, and three sensitivity cases in which the number of FOTP demands was reduced, along with the Birnbaum importance of the FOTP.

  16. Efficacy of Intra-Arterial Infusion Chemotherapy for Head and Neck Cancers Using Coaxial Catheter Technique: Initial Experience

    SciTech Connect

    Tsurumaru, Daisuke Kuroiwa, Toshiro; Yabuuchi, Hidetake; Hirata, Hideki; Higaki, Yuichiro; Tomita, Kichinobu

    2007-04-15

    The aim of this study was to evaluate the efficacy of intra-arterial infusion chemotherapy for head and neck cancers using a coaxial catheter technique: the superficial temporal artery (STA)-coaxial catheter method. Thirty-one patients (21 males and 10 females; 37-83 years of age) with squamous cell carcinoma of the head and neck (maxilla, 2; epipharynx, 4; mesopharynx, 8; oral floor, 4; tongue, 10; lower gingiva, 1; buccal mucosa, 2) were treated by intra-arterial infusion chemotherapy. Four patients were excluded from the tumor-response evaluation because of a previous operation or impossibility of treatment due to catheter trouble. Forty-eight sessions of catheterization were performed. A guiding catheter was inserted into the STA and a microcatheter was advanced into the tumor-feeding artery via the guiding catheter under angiographic guidance. When the location of the tumor or its feeding artery was uncertain on angiography, computed tomographic angiography was performed. The anticancer agent carboplatin (CBDCA) was continuously injected for 24 h through the microcatheter from a portable infusion pump attached to the patient's waist. The total administration dose was 300-1300 mg per body. External radiotherapy was administered during intra-arterial chemotherapy at a total dose of 21-70.5 Gy.The initial response was complete response in 15 patients, partial response in 7 patients, and no change in 5 patients; the overall response rate was 81.5% (22/27). Complication-related catheter maintenance was observed in 15 of 48 sessions of catheterization. Injury and dislocation of the microcatheter occurred 10 times in 7 patients. Catheter infection was observed three times in each of two patients, and catheter occlusion and vasculitis occurred in two patients. Intra-arterial infusion chemotherapy via the STA-coaxial catheter method could have potential as a favorable treatment for head and neck tumors.

  17. Error indicators and accuracy improvements of finite element solutions

    NASA Technical Reports Server (NTRS)

    Noor, Ahmed K.; Peters, Jeanne M.

    1988-01-01

    Practical and reliable estimators of the discretization errors in engineering problems are developed. Error indicators for identifying the regions or elements of the solution domain which are likely to have the largest discretization errors are presented, and a simple computational procedure for improving the accuracy of the finite element solutions for shell problems is given. The similarities between the proposed procedure and a preconditioned conjugate gradient (PCG) technique are identified and exploited to generate pointwise error indicators from the PCG technique. Numerical examples in the linear static analysis of shells are presented.

  18. Inverse design technique for cascades

    NASA Technical Reports Server (NTRS)

    Zannetti, L.; Pandolfi, M.

    1984-01-01

    A numerical technique to generate cascades is presented. The basic prescribed parameters are: inlet angle, exit pressure, and distribution of blade thickness and lift along a blade. Other sets of parameters are also discussed. The technique is based on the lambda scheme. The problem of stability of the computation as a function of the prescribed set of parameters and the treatment of boundary conditions is discussed. A one dimensional analysis to indicate a possible way for assuring stability for any two dimensional calculation is provided.

  19. Covariance propagation in spectral indices

    DOE PAGESBeta

    Griffin, P. J.

    2015-01-09

    The dosimetry community has a history of using spectral indices to support neutron spectrum characterization and cross section validation efforts. An important aspect to this type of analysis is the proper consideration of the contribution of the spectrum uncertainty to the total uncertainty in calculated spectral indices (SIs). This study identifies deficiencies in the traditional treatment of the SI uncertainty, provides simple bounds to the spectral component in the SI uncertainty estimates, verifies that these estimates are reflected in actual applications, details a methodology that rigorously captures the spectral contribution to the uncertainty in the SI, and provides quantified examplesmore »that demonstrate the importance of the proper treatment the spectral contribution to the uncertainty in the SI.« less

  20. Chapter A7. Biological Indicators

    USGS Publications Warehouse

    Myers, Donna N.; Wilde, Franceska D.

    2003-01-01

    The National Field Manual for the Collection of Water-Quality Data (National Field Manual) provides guidelines and standard procedures for U.S. Geological Survey (USGS) personnel who collect data used to assess the quality of the Nation's surface-water and ground-water resources. This chapter of the manual includes procedures for the (1) determination of biochemical oxygen demand using a 5-day bioassay test; (2) collection, identification, and enumeration of fecal indicator bacteria; (3) collection of samples and information on two laboratory methods for fecal indicator viruses (coliphages); and (4) collection of samples for protozoan pathogens. Each chapter of the National Field Manual is published separately and revised periodically. Newly published and revised chapters are posted on the World Wide Web on the USGS page 'National Field Manual for the Collection of Water-Quality Data.' The URL for this page is http://pubs.water.usgs.gov/twri9A/ (accessed November 25, 2003).

  1. Covariance propagation in spectral indices

    SciTech Connect

    Griffin, P. J.

    2015-01-09

    The dosimetry community has a history of using spectral indices to support neutron spectrum characterization and cross section validation efforts. An important aspect to this type of analysis is the proper consideration of the contribution of the spectrum uncertainty to the total uncertainty in calculated spectral indices (SIs). This study identifies deficiencies in the traditional treatment of the SI uncertainty, provides simple bounds to the spectral component in the SI uncertainty estimates, verifies that these estimates are reflected in actual applications, details a methodology that rigorously captures the spectral contribution to the uncertainty in the SI, and provides quantified examples that demonstrate the importance of the proper treatment the spectral contribution to the uncertainty in the SI.

  2. Development of an Indicator to Monitor Mediterranean Wetlands

    PubMed Central

    Sanchez, Antonio; Abdul Malak, Dania; Guelmami, Anis; Perennou, Christian

    2015-01-01

    Wetlands are sensitive ecosystems that are increasingly subjected to threats from anthropogenic factors. In the last decades, coastal Mediterranean wetlands have been suffering considerable pressures from land use change, intensification of urban growth, increasing tourism infrastructure and intensification of agricultural practices. Remote sensing (RS) and Geographic Information Systems (GIS) techniques are efficient tools that can support monitoring Mediterranean coastal wetlands on large scales and over long periods of time. The study aims at developing a wetland indicator to support monitoring Mediterranean coastal wetlands using these techniques. The indicator makes use of multi-temporal Landsat images, land use reference layers, a 50m numerical model of the territory (NMT) and Corine Land Cover (CLC) for the identification and mapping of wetlands. The approach combines supervised image classification techniques making use of vegetation indices and decision tree analysis to identify the surface covered by wetlands at a given date. A validation process is put in place to compare outcomes with existing local wetland inventories to check the results reliability. The indicator´s results demonstrate an improvement in the level of precision of change detection methods achieved by traditional tools providing reliability up to 95% in main wetland areas. The results confirm that the use of RS techniques improves the precision of wetland detection compared to the use of CLC for wetland monitoring and stress the strong relation between the level of wetland detection and the nature of the wetland areas and the monitoring scale considered. PMID:25826210

  3. Development of an indicator to monitor mediterranean wetlands.

    PubMed

    Sanchez, Antonio; Abdul Malak, Dania; Guelmami, Anis; Perennou, Christian

    2015-01-01

    Wetlands are sensitive ecosystems that are increasingly subjected to threats from anthropogenic factors. In the last decades, coastal Mediterranean wetlands have been suffering considerable pressures from land use change, intensification of urban growth, increasing tourism infrastructure and intensification of agricultural practices. Remote sensing (RS) and Geographic Information Systems (GIS) techniques are efficient tools that can support monitoring Mediterranean coastal wetlands on large scales and over long periods of time. The study aims at developing a wetland indicator to support monitoring Mediterranean coastal wetlands using these techniques. The indicator makes use of multi-temporal Landsat images, land use reference layers, a 50m numerical model of the territory (NMT) and Corine Land Cover (CLC) for the identification and mapping of wetlands. The approach combines supervised image classification techniques making use of vegetation indices and decision tree analysis to identify the surface covered by wetlands at a given date. A validation process is put in place to compare outcomes with existing local wetland inventories to check the results reliability. The indicator´s results demonstrate an improvement in the level of precision of change detection methods achieved by traditional tools providing reliability up to 95% in main wetland areas. The results confirm that the use of RS techniques improves the precision of wetland detection compared to the use of CLC for wetland monitoring and stress the strong relation between the level of wetland detection and the nature of the wetland areas and the monitoring scale considered. PMID:25826210

  4. Thermodynamic indicators for environmental certification.

    PubMed

    Panzieri, Margherita; Porcelli, Marcello; Pulselli, Federico Maria

    2002-09-01

    The Earth is an open thermodynamic system, that remains in a steady state far from the equilibrium, through energy and matter exchanges with the surrounding environment. These natural constraints, which prevent the system from maximizing its entropy, are threatened by human action and our ecosystem needs urgent protection. In this viewpoint the environmental certification was born, according to international standards ISO 14001, ISO 14040, and European Regulation EMAS. These are voluntary adhesions to a program of environmental protection by companies, administrations and organizations which, starting from the respect of the existing environmental laws and regulations, decide to further improve their environmental performance. To obtain and maintain certification of a system is necessary to apply some indicators to evaluate its environmental performance and to demonstrate its progressive improvement. Here we propose to use for this purpose the thermodynamic indicators produced from energy analysis by Odum. The case study is Montalcino city (Italy) and energy indicators are used to evaluate environmental performance of this system where exist different activities, from agricultural productions, to tourism. Results show that energy analysis could become a valid standard monitoring method for environmental certification, especially in consideration of its wide application field. PMID:12407910

  5. DOE performance indicators guidance document

    SciTech Connect

    Not Available

    1992-12-01

    SEN-29-91 directed that a Department-wide uniform process for trending and analysis of operational data be established for DOE facilities. This Performance Indicator (PI) Program establishes a uniform system for trending and analyzing operational data providing an important tool to help assess and support progress in improving performance and strengthening both DOE and contractor line management control of operations. DOE, similar to the commercial nuclear industry, considers that facilities with good performance, as measured by an overall set of performance indicators, are well-managed facilities. The Performance Indicator Program established by SEN-29-91 is but one of several initiatives undertaken by DOE to instill a new DOE and DOE contractor line management culture committed to achieving a rising standard of acceptable performance. Line management trending and analysis of data depicting the performance of their facilities is an essential element in creating this culture of ``continuous improvement,`` where performance gains achieved are maintained and early identification of deteriorating environmental, safety, and health conditions is accomplished.

  6. Indications for eye removal surgeries

    PubMed Central

    Koylu, Mehmet T.; Gokce, Gokcen; Uysal, Yusuf; Ceylan, Osman M.; Ak?nc?oglu, Dorukcan; Gunal, Armagan

    2015-01-01

    Objectives: To analyze the indications and types of eye removals at a military tertiary care hospital in Turkey. Methods: The medical records (age, gender, affected eye, type of surgical procedure, indications of surgery) of 123 patients who underwent evisceration and enucleation in the course of a 15-year period (January 2000 to December 2014) at Gulhane Military Medical Academy, Ankara, Turkey were reviewed retrospectively. Results: The mean age was 35.61±18.52 (range 3-80 years). The number of male in the patient group was 92 (74.8%) and female was 31 (25.2%). Patients who underwent evisceration were 95 (77.2%), whereas 28 (22.8%) of them underwent enucleation. The mean age of the eviscerated patients was 30.63±13.08, whereas the mean age of the enucleated patients was 52.50±23.92 (p<0.001). The leading indications for eye amputations were trauma (n=62, 50.4%), malignancy (n=20, 16.3%), painful blind eye and absolute glaucoma (n=20, 16.3%), endophthalmitis (n=12, 9.7%), and phthisis bulbi, and cosmetic reasons (n=9, 7.3%). Conclusion: Trauma was the most common etiology for evisceration, and malignancy was the most common etiology for enucleation. Using protective eyewear and early detection of intraocular malignancy and glaucoma through routine ophthalmic examinations are essential for providing non-invasive treatment modalities instead of eye removal. PMID:26446332

  7. Indices of 1-forms, intersection indices, and Newton polyhedra

    NASA Astrophysics Data System (ADS)

    Esterov, A. I.

    2006-08-01

    The intersection indices of a certain kind of analytic set (resultant cycles) are expressed in terms of the Newton polyhedra of the corresponding defining systems of functions, provided that the principal parts of the functions are in general position. Among special cases of resultant cycles are complete intersections and the loci of matrix rank drop. Among special cases of the intersection indices of such sets are the index of a singularity of a Poincaré-Hopf vector field and its generalizations to the case of singular varieties, the index of a system of germs of 1-forms at an isolated singularity of a Gusein-Zade-Ebeling complete intersection, and the Suwa residue of a system of germs of sections of a vector bundle. One also obtains as a consequence the well-known Kushnirenko-Oka formula for the Milnor number of the germ of a map in terms of the Newton polyhedra of its components. A generalization of the well-known equality of the above-mentioned invariants of singularities to the dimensions of certain local rings is also presented.

  8. Highlighted Ca2+ imaging with a genetically encoded ‘caged’ indicator

    PubMed Central

    Matsuda, Tomoki; Horikawa, Kazuki; Saito, Kenta; Nagai, Takeharu

    2013-01-01

    Genetically encoded fluorescent indicators for bioimaging are powerful tools for visualizing biological phenomena in specified cell types or cellular compartments. However, available gene promoters or localization sequences are not applicable for visualizing all expression events. Furthermore, a visualization technique focusing on single cells or cellular compartments is required for characterizing specific cellular properties including individuality of cells in the cell population. To address these limitations, we developed a genetically encoded caged Ca2+ indicator for which expression timing and location could be controlled. This indicator, PA-TNXL, comprises a Ca2+-binding protein and troponin between a photoactivatable FRET donor (PA-GFP) and a FRET quencher (dim variant of YFP). Ultraviolet irradiation activates the FRET Ca2+ indicator. Using this indicator, we successfully imaged Ca2+ dynamics in a given set of HeLa cells and cultured hippocampal neurons. This technology can be applied for developing other photoactivatable indicators, thereby opening a new area of biological research. PMID:23474844

  9. STORMWATER MANAGEMENT MEASURES AND FECAL INDICATOR BACTERIA

    E-print Network

    STORMWATER MANAGEMENT MEASURES AND FECAL INDICATOR BACTERIA BY ROBERT A. WILDEY BA, New College............................................................................................................. 1 Regulatory Limits for Indicator Bacteria................................................................ 2 Indicator Bacteria in the Environment

  10. Construction and demolition waste indicators.

    PubMed

    Mália, Miguel; de Brito, Jorge; Pinheiro, Manuel Duarte; Bravo, Miguel

    2013-03-01

    The construction industry is one of the biggest and most active sectors of the European Union (EU), consuming more raw materials and energy than any other economic activity. Furthermore, construction waste is the commonest waste produced in the EU. Current EU legislation sets out to implement construction and demolition waste (CDW) prevention and recycling measures. However it lacks tools to accelerate the development of a sector as bound by tradition as the building industry. The main objective of the present study was to determine indicators to estimate the amount of CDW generated on site both globally and by waste stream. CDW generation was estimated for six specific sectors: new residential construction, new non-residential construction, residential demolition, non-residential demolition, residential refurbishment, and non-residential refurbishment. The data needed to develop the indicators was collected through an exhaustive survey of previous international studies. The indicators determined suggest that the average composition of waste generated on site is mostly concrete and ceramic materials. Specifically for new residential and new non-residential construction the production of concrete waste in buildings with a reinforced concrete structure lies between 17.8 and 32.9 kg m(-2) and between 18.3 and 40.1 kg m(-2), respectively. For the residential and non-residential demolition sectors the production of this waste stream in buildings with a reinforced concrete structure varies from 492 to 840 kg m(-2) and from 401 to 768 kg/m(-2), respectively. For the residential and non-residential refurbishment sectors the production of concrete waste in buildings lies between 18.9 and 45.9 kg/m(-2) and between 18.9 and 191.2 kg/m(-2), respectively. PMID:23315370

  11. Autographic Indicator for Tension Tests

    E-print Network

    Hood, George J.

    1902-01-01

    . The first class containing devices which have parts of the record* ing device fixed to some part of the testing machine of discon­ nected entirely* She second class, including all recording devices connected only to the test piece* The first class... is inaccurate because distortions in the frame of the testing machine itself9 enter into the autographic record* Examples of the first class may be found in •Handbook of Testing Materials9 by Adolf Martens, two volumes* In the second class, the indicators...

  12. Space Weathering: An Ultraviolet Indicator

    NASA Technical Reports Server (NTRS)

    Hendrix, A. R.; Vilas, F.

    2004-01-01

    We present evidence suggesting that the spectral slope of airless bodies in the UV-visible wavelength range can be used as an indicator of exposure to space weathering. While space weathering generally produces a reddening of spectra in the visible-NIR spectral regions, it tends to result in a bluing of the UV-visible portion of the spectrum, and may in some cases produce a spectral reversal. The bluing effect may be detectable with smaller amounts of weathering than are necessary to detect the longer-wavelength weathering effects.

  13. Space Weathering: An Ultraviolet Indicator

    NASA Technical Reports Server (NTRS)

    Hendrix, A. R.; Vilas, F.

    2003-01-01

    We present evidence suggesting that the spectral slope of airless bodies in the UV-visible wavelength range can be used as an indicator of exposure to space weathering. While space weathering generally produces a reddening of spectra in the visible-NIR spectral regions, it tends to result in a bluing of the UV-visible portion of the spectrum, and may in some cases produce a spectral reversal. The bluing effect may be detectable with smaller amounts of weathering than are necessary to detect the longer-wavelength weathering effects.

  14. Optical indices of lithiated electrochromic oxides

    SciTech Connect

    Rubin, M.; Rottkay, K. von; Wen, S.J.; Ozer, N.; Slack, J.

    1996-09-01

    Optical indices have been determined for thin films of several electrochromic oxide materials. One of the most important materials in electrochromic devices, WO{sub 3}, was thoroughly characterized for a range of electrochromic states by sequential injection of Li ions. Another promising material, Li{sub 0.5}Ni{sub 0.5}O, was also studied in detail. Less detailed results are presented for three other common lithium-intercalating electrochromic electrode materials: V{sub 2}O{sub 5}, LiCoO{sub 2}, and CeO{sub 2}-TiO{sub 2}. The films were grown by sputtering, pulsed laser deposition (PLD) and sol-gel techniques. Measurements were made using a combination of variable-angle spectroscopy ellipsometry and spectroradiometry. The optical constants were then extracted using physical and spectral models appropriate to each material. Optical indices of the underlying transparent conductors, determined in separate studies, were fixed in the models of this work. The optical models frequently agree well with independent physical measurements of film structure, particularly surface roughness by atomic force microscopy. Inhomogeneity due to surface roughness, gradient composition, and phase separation are common in both the transparent conductors and electrochromics, resulting sometimes in particularly complex models for these materials. Complete sets of data are presented over the entire solar spectrum for a range of colored states. This data is suitable for prediction of additional optical properties such as oblique transmittance and design of complete electrochromic devices.

  15. Low latency counter event indication

    DOEpatents

    Gara, Alan G. (Mount Kisco, NY); Salapura, Valentina (Chappaqua, NY)

    2008-09-16

    A hybrid counter array device for counting events with interrupt indication includes a first counter portion comprising N counter devices, each for counting signals representing event occurrences and providing a first count value representing lower order bits. An overflow bit device associated with each respective counter device is additionally set in response to an overflow condition. The hybrid counter array includes a second counter portion comprising a memory array device having N addressable memory locations in correspondence with the N counter devices, each addressable memory location for storing a second count value representing higher order bits. An operatively coupled control device monitors each associated overflow bit device and initiates incrementing a second count value stored at a corresponding memory location in response to a respective overflow bit being set. The incremented second count value is compared to an interrupt threshold value stored in a threshold register, and, when the second counter value is equal to the interrupt threshold value, a corresponding "interrupt arm" bit is set to enable a fast interrupt indication. On a subsequent roll-over of the lower bits of that counter, the interrupt will be fired.

  16. Low latency counter event indication

    DOEpatents

    Gara, Alan G. (Mount Kisco, NY); Salapura, Valentina (Chappaqua, NY)

    2010-08-24

    A hybrid counter array device for counting events with interrupt indication includes a first counter portion comprising N counter devices, each for counting signals representing event occurrences and providing a first count value representing lower order bits. An overflow bit device associated with each respective counter device is additionally set in response to an overflow condition. The hybrid counter array includes a second counter portion comprising a memory array device having N addressable memory locations in correspondence with the N counter devices, each addressable memory location for storing a second count value representing higher order bits. An operatively coupled control device monitors each associated overflow bit device and initiates incrementing a second count value stored at a corresponding memory location in response to a respective overflow bit being set. The incremented second count value is compared to an interrupt threshold value stored in a threshold register, and, when the second counter value is equal to the interrupt threshold value, a corresponding "interrupt arm" bit is set to enable a fast interrupt indication. On a subsequent roll-over of the lower bits of that counter, the interrupt will be fired.

  17. Advanced Fibre Bragg Grating and Microfibre Bragg Grating Fabrication Techniques

    NASA Astrophysics Data System (ADS)

    Chung, Kit Man

    Fibre Bragg gratings (FBGs) have become a very important technology for communication systems and fibre optic sensing. Typically, FBGs are less than 10-mm long and are fabricated using fused silica uniform phase masks which become more expensive for longer length or non-uniform pitch. Generally, interference UV laser beams are employed to make long or complex FBGs, and this technique introduces critical precision and control issues. In this work, we demonstrate an advanced FBG fabrication system that enables the writing of long and complex gratings in optical fibres with virtually any apodisation profile, local phase and Bragg wavelength using a novel optical design in which the incident angles of two UV beams onto an optical fibre can be adjusted simultaneously by moving just one optical component, instead of two optics employed in earlier configurations, to vary the grating pitch. The key advantage of the grating fabrication system is that complex gratings can be fabricated by controlling the linear movements of two translation stages. In addition to the study of advanced grating fabrication technique, we also focus on the inscription of FBGs written in optical fibres with a cladding diameter of several ten's of microns. Fabrication of microfibres was investigated using a sophisticated tapering method. We also proposed a simple but practical technique to filter out the higher order modes reflected from the FBG written in microfibres via a linear taper region while the fundamental mode re-couples to the core. By using this technique, reflection from the microfibre Bragg grating (MFBG) can be effectively single mode, simplifying the demultiplexing and demodulation processes. MFBG exhibits high sensitivity to contact force and an MFBG-based force sensor was also constructed and tested to investigate their suitability for use as an invasive surgery device. Performance of the contact force sensor packaged in a conforming elastomer material compares favourably to one of the best-performing commercial contact force sensors in catheterization applications. The proposed sensor features extremely high sensitivity up to 1.37-mN, miniature size (2.4-mm) that meets standard specification, excellent linearity, low hysteresis, and magnetic resonance imaging compatibility.

  18. [Nonablative fractional lasers: Acne scars and other indications].

    PubMed

    Degitz, K

    2015-10-01

    Nonablative photothermolysis has become an established technique in laser dermatology. It is mainly used for restructuring dermal connective tissue in order to treat, for example, acne scars or solar elastosis. It is also applied to the treatment of melasma and other benign cutaneous pigment disorders. This article discusses various indications in light of published observations and with regard to practical considerations. PMID:26253115

  19. Research Performance Evaluation: Some Critical Thoughts on Standard Bibliometric Indicators

    ERIC Educational Resources Information Center

    Anninos, Loukas N.

    2014-01-01

    The bibliometric methodology is an established technique for research evaluation as it offers an objective determination and comparison of research performance. This paper aims to critically assess some standard bibliometric indicators commonly used (based on publication and citation counts) to evaluate academic units, and examine whether there…

  20. INDICATORS OF RISK: AN ANALYSIS APPROACH FOR IMPROVED RIVER MANAGEMENT

    EPA Science Inventory

    A risk index is an approach to measuring the level of risk to the plants and/or animals (biota) in a certain area using water and habitat quality information. A new technique for developing risk indices was applied to data collected from Mid-Atlantic streams of the U.S. during 1...

  1. PARTICLE ASSOCIATION EFFECTS ON MICROBIAL INDICATOR CONCENTRATIONS FOR CSO DISINFECTION

    EPA Science Inventory

    The effect of blending on indicator microorganism concentrations in combined sewer overflow (CSO) was investigated due to concerns that standard techniques fail to measure particle-associated organisms found in sewage. It was shown that blending CSO samples diluted in a mixture ...

  2. 'Blueberry' Layers Indicate Watery Origins

    NASA Technical Reports Server (NTRS)

    2004-01-01

    This microscopic image, taken at the outcrop region dubbed 'El Capitan' near the Mars Exploration Rover Opportunity's landing site, reveals millimeter-scale (.04 inch-scale) layers in the lower portion. This same layering is hinted at by the fine notches that run horizontally across the sphere-like grain or 'blueberry' in the center left. The thin layers do not appear to deform around the blueberry, indicating that these geologic features are concretions and not impact spherules or ejected volcanic material called lapilli. Concretions are balls of minerals that form in pre-existing wet sediments. This image was taken by the rover's microscopic imager on the 29th martian day, or sol, of its mission. The observed area is about 3 centimeters (1.2 inches) across.

  3. [Ketamine: psychiatric indications and misuses].

    PubMed

    Delimbeuf, N; Petit, A; Karila, L; Lejoyeux, M

    2014-01-01

    Ketamine or -ketamine hydrochloride- is used as an anesthesic and a painkiller. It may also, in some indications, be prescribed in psychiatry and addictology. A literature review was conducted from 2003 to 2013, in PubMed, Google Scholar, Embase, and Psyclnfo, using the following key words (alone or combined): "ketamine", "abuse", "addiction", "dependence" and "misuse". Various studies have shown the benefit of kétamine in some psychiatric conditions such as major depressive episodes and electroconvulsive therapy. Others have demonstrated beneficial effects in alcohol or opiate abstinence maintenance. Ketamine seems to be a promising molecule in psychiatry and in the treatment of addictions, despite the absence of marketing approval for those specific uses. Being a strong psycho-stimulant, ketamine can be the source of abuse and dependence with somatic, psychiatric and cognitive complications. PMID:25158385

  4. Triboluminescent tamper-indicating device

    DOEpatents

    Johnston, Roger G. (Los Alamos, NM); Garcia, Anthony R. E. (Espanola, NM)

    2002-01-01

    A tamper-indicating device is described. The device has a transparent or translucent cylindrical body that includes triboluminescent material, and an outer opaque layer that prevents ambient light from entering. A chamber in the body holds an undeveloped piece of photographic film bearing an image. The device is assembled from two body members. One of the body members includes a recess for storing film and an optical assembly that can be adjusted to prevent light from passing through the assembly and exposing the film. To use the device with a hasp, the body members are positioned on opposite sides of a hasp, inserted through the hasp, and attached. The optical assembly is then manipulated to allow any light generated from the triboluminescent materials during a tampering activity that damages the device to reach the film and destroy the image on the film.

  5. Multiwavelength star formation indicators: Observations

    E-print Network

    H. R. Schmitt; D. Calzetti; L. Armus; M. Giavalisco; T. M. Heckman; R. C. Kennicutt Jr.; C. Leitherer; G. R. Meurer

    2006-02-03

    We present a compilation of multiwavelength data on different star formation indicators for a sample of nearby star forming galaxies. Here we discuss the observations, reductions and measurements of ultraviolet images obtained with STIS, on board the Hubble Space Telescope, ground-based Halpha, and VLA 8.46 GHz radio images. These observations are complemented with infrared fluxes, as well as large aperture optical radio and ultraviolet data from the literature. This database will be used in a forthcoming paper to compare star formation rates at different wavebands. We also present spectral energy distributions (SEDs) for those galaxies with at least one far-infrared measurements from ISO, longward of 100 um. These SEDs are divided in two groups, those which are dominated by the far-infrared emission, and those where the contribution from the far-infrared and optical emission is comparable. These SEDs are useful tools to study the properties of high redshift galaxies.

  6. Range indices of geomagnetic activity

    USGS Publications Warehouse

    Stuart, W.F.; Green, A.W., Jr.

    1988-01-01

    The simplest index of geomagnetic activity is the range in nT from maximum to minimum value of the field in a given time interval. The hourly range R was recommended by IAGA for use at observatories at latitudes greater than 65??, but was superceded by AE. The most used geomagnetic index K is based on the range of activity in a 3 h interval corrected for the regular daily variation. In order to take advantage of real time data processing, now available at many observatories, it is proposed to introduce a 1 h range index and also a 3 h range index. Both will be computed hourly, i.e. each will have a series of 24 per day, the 3 h values overlapping. The new data will be available as the range (R) of activity in nT and also as a logarithmic index (I) of the range. The exponent relating index to range in nT is based closely on the scale used for computing K values. The new ranges and range indices are available, from June 1987, to users in real time and can be accessed by telephone connection or computer network. Their first year of production is regarded as a trial period during which their value to the scientific and commercial communities will be assessed, together with their potential as indicators of regional and global disturbances' and in which trials will be conducted into ways of eliminating excessive bias at quiet times due to the rate of change of the daily variation field. ?? 1988.

  7. A sensitivity analysis of nine diversity and seven similarity indices

    USGS Publications Warehouse

    Boyle, Terrence P.; Smillie, Gary M.; Anderson, Jana C.; Beeson, David R.

    1990-01-01

    Indices summarizing community structure are used to evaluate fundamental community ecology, species interaction, biogeographical factors, and environmental stress. Some of these indices are insensitive to gross community changes induced by contaminants of pollution. Sixteen indices commonly used to assess the status of aquatic communities in water quality studies were evaluated using computer simulation techniques to determine specific index responses. Three communities of different initial structure (19 species, 38 species, and 83 species) were generated using the lognormal equation. Each community was then perturbed in three ways: common species disproportionally reduced, all species proportionally reduced, and rare species disproportionally reduced. The behavior of the indices was analyzed graphically and differential response due to initial community structure and type of community change was documented. Some recommendations of potential sources of error using community levels indices were developed.

  8. Indicating anthropogenic effectson urban water system - indicators and extension

    NASA Astrophysics Data System (ADS)

    Strauch, G.; Ufz-Team

    2003-04-01

    Urban water systems are polluted by diffusive and direct contribution of anthropogenic activities. Besides industrial contaminants like aromatic and chlorinated HC and other persistent organic compounds, the urban aquatic environment is increasingly polluted by low concentrated but high eco-toxic compounds as pharmaceuticals, fragrances, plasticizers which most have disrupt endocrine functions, and trace elements carried in by surface and sub-surface waste water and seeping processes. This contamination could have a longtime impact on the urban ecosystem and on the human health. The interdisciplinary project on risk assessment of water pollution was initiated to explore new methodologies for assessing human activities on the urban water system and processes among urban watersheds. In a first assumption we used a flow model concept with in- and output and surface water transport represented by the city of Halle, Germany, and the river Saale. The river Saale acts as surface water system collecting waste water inputs along the city traverse. We investigated the anthropogenic effect on the urban water system using the indicators hydrological parameters, compound specific pattern of complex organic substances and trace elements, isotopic signatures of water (H, O) and dissolved substances (sulfate, DIC, nitrate), pathogens, and microbiota. A first balance modeling showed that main ions are not very sensitive concerning the direct urban input into the river. Depending on the discharge of the river in high and low flood stages the load of dissolved matter has no specific urban effect. However, the concentration pattern of fragrances (tonalid, galaxolid) and endocrine disrupters (t-nonylphenol) point to a different pollution along the city traverse: downstream of the sewage plant a higher load was observed in comparison to the upstream passage. Furthermore, a degradation ability of fungi and bacteria occurred in the bank sediments could be detected in lab experiments concerning the fragrances, and endocrine disrupters (t-nonylphenol, phthalate). The Saale water samples contain components able to eco-toxic and immunomodulated effects as measured on the vitality and cytokine-secretion profile of human peripheral blood mononuclear cells (PBMC). Even fragrances caused such effects which are unknown so far. The study of assessing urban effects onto the water system is still under investigation.

  9. Optically broadcasting wind direction indicator

    NASA Technical Reports Server (NTRS)

    Zysko, Jan A. (inventor)

    1994-01-01

    An optically broadcasting wind direction indicator generates flashes of light which are separated by a time interval that is directly proportional to the angle of the wind direction relative to a fixed direction, such as north. An angle/voltage transducer generates a voltage that is proportional to the wind direction relative to the fixed direction, and this voltage is employed by timing circuitry or a microprocessor that generates pulses for actuating a light source trigger circuit first at the start of the time interval, and then at the end of the time interval. To aid an observer in distinguishing between the beginning and end of the interval, two stop flashes can be provided in quick succession. The time scale is preferably chosen so that each second of the time interval corresponds to 30 deg of direction relative to north. In this manner, an observer can easily correlate the measured time interval to the wind direction by visualizing the numbers on a conventional clock face, each of which correspond to one second of time and 30 deg of angle.

  10. Criteria to indicate testosterone administration.

    PubMed Central

    Kicman, A T; Brooks, R V; Collyer, S C; Cowan, D A; Nanjee, M N; Southan, G J; Wheeler, M J

    1990-01-01

    A detection method for testosterone administration was developed using radioimmunoassay to measure the urinary ratios of testosterone (T) to epitestosterone (E) and to luteinizing hormone (LH). A comparative study of the effect on these ratios of a single intramuscular injection of testosterone heptanoate followed by stimulation with human chorionic gonadotrophin (HCG) in three normal men was undertaken. To allow immediate investigation, a commercially supplied epitestosterone antiserum was used. This study showed that both T/E and T/LH ratios could be used to detect testosterone administration, the latter also being an indicator of HCG use due to cross-reactivity with the LH antiserum. Subsequently, an epitestosterone antiserum of superior specificity was raised and used in a study to demonstrate the insignificant effect of exercise on these ratios. Finally, an intramuscular injection of a combined preparation of testosterone/epitestosterone heptanoates resulted in raised ratios of T/LH but not of T/E. This demonstrated the importance of the T/LH ratio in circumstances where the T/E ratio can be easily circumvented. PMID:2097025

  11. Integrated Initiating Event Performance Indicators

    SciTech Connect

    S. A. Eide; Dale M. Rasmuson; Corwin L. Atwood

    2005-09-01

    The U.S. Nuclear Regulatory Commission Industry Trends Program (ITP) collects and analyses industry-wide data, assesses the safety significance of results, and communicates results to Congress and other stakeholders. This paper outlines potential enhancements in the ITP to comprehensively cover the Initiating Events Cornerstone of Safety. Future work will address other cornerstones of safety. The proposed Tier 1 activity involves collecting data on ten categories of risk-significant initiating events, trending the results, and comparing early performance with prediction limits (allowable numbers of events, above which NRC action may occur). Tier 1 results would be used to monitor industry performance at the level of individual categories of initiating events. The proposed Tier 2 activity involves integrating the information for individual categories of initiating events into a single risk-based indicator, termed the Baseline Risk Index for Initiating Events or BRIIE. The BRIIE would be evaluated yearly and compared against a threshold. BRIIE results would be reported to Congress on a yearly basis.

  12. Butterflied bivalves as paleoenvironmental indicators

    SciTech Connect

    Allmon, R.A.

    1985-01-01

    Fossil bivalves are seldom preserved in a flat-open, yet still articulated position, or butterflied. A study of butterflied bivalves in the Delphi Station of the Hamilton Fm. suggests that this preservation mode is limited to one or possibly two sedimentary environments: deltaic and fluvial. Three parameters control the mode of preservation of fossil bivalves: 1) rate of sedimentation, 2) depth of bioturbation, and 3) time of ligament failure. Using these three parameters a model for the occurrence of butterflied bivalves can be constructed: bioturbation depth divided by sedimentation rate gives the disturbance time (DST), during which shells on one bedding plane would be subject to reworking. This can be seen as a time window into which ligament failure times - or disarticulation time (DAT) - can be fitted. If DATindicators of conditions prevailing in environments of deposition.

  13. Improved Search Techniques

    NASA Technical Reports Server (NTRS)

    Albornoz, Caleb Ronald

    2012-01-01

    Thousands of millions of documents are stored and updated daily in the World Wide Web. Most of the information is not efficiently organized to build knowledge from the stored data. Nowadays, search engines are mainly used by users who rely on their skills to look for the information needed. This paper presents different techniques search engine users can apply in Google Search to improve the relevancy of search results. According to the Pew Research Center, the average person spends eight hours a month searching for the right information. For instance, a company that employs 1000 employees wastes $2.5 million dollars on looking for nonexistent and/or not found information. The cost is very high because decisions are made based on the information that is readily available to use. Whenever the information necessary to formulate an argument is not available or found, poor decisions may be made and mistakes will be more likely to occur. Also, the survey indicates that only 56% of Google users feel confident with their current search skills. Moreover, just 76% of the information that is available on the Internet is accurate.

  14. Tamper-indicating barcode and method

    SciTech Connect

    Cummings, Eric B.; Even, Jr., William R.; Simmons, Blake A.; Dentinger, Paul Michael

    2005-03-22

    A novel tamper-indicating barcode methodology is disclosed that allows for detection of alteration to the barcode. The tamper-indicating methodology makes use of a tamper-indicating means that may be comprised of a particulate indicator, an optical indicator, a deformable substrate, and/or may be an integrated aspect of the barcode itself. This tamper-indicating information provides greater security for the contents of containers sealed with the tamper-indicating barcodes.

  15. MCH indicators in south Asia.

    PubMed

    Ramji, S

    1997-05-01

    This article presents some statistical indicators of maternal and child health in countries of South Asia, including Afghanistan, Bangladesh, Bhutan, India, Nepal, Pakistan, and Sri Lanka. Statistical tables aggregate data for the entire South Asia region and industrialized countries, for comparative purposes. South Asia has about 22% of world population, 33% of births annually, about 37% of annual global child mortality (CM), and the second highest maternal mortality ratio (MMR). In 1995, Sri Lanka had the lowest CM. Afghanistan had the highest CM. CM in the region was 121, or 15 times more than in industrialized countries. Countries with higher CM rates tended to have higher birthrates. Total fertility rates ranged from 2.4 in Sri Lanka, to 6.6 in Afghanistan. The total fertility rate in the region was 3.9. 29% of births in the region were attended by a trained attendant during 1990-96. Under 10% of births were attended by a trained attendant in Nepal (7%) and Afghanistan (9%). India had the highest proportion of births attended by a trained attendant (34%). Contraceptive prevalence ranged from a low of 2% in Afghanistan, to a high of 66% in Sri Lanka. Contraceptive prevalence for the region was 38%. Female literacy was lowest in Nepal (14%) and Afghanistan (15%). Sri Lanka had the highest female literacy of 87%, followed by India with 38%. Female literacy for the region was 36%. Countries with high fertility rates tended to have high MMRs. MMR was inversely related to contraceptive prevalence rates, presence of trained attendants during delivery, and adult female literacy rates. 90% of the region had coverage with BCG immunization, followed by DPT, OPV, and measles immunization. Maternal tetanus toxoid was 69%. PMID:9332117

  16. Nondestructive evaluation technique guide

    NASA Technical Reports Server (NTRS)

    Vary, A.

    1973-01-01

    A total of 70 individual nondestructive evaluation (NDE) techniques are described. Information is presented that permits ease of comparison of the merits and limitations of each technique with respect to various NDE problems. An NDE technique classification system is presented. It is based on the system that was adopted by the National Materials Advisory Board (NMAB). The classification system presented follows the NMAB system closely with the exception of additional categories that have been added to cover more advanced techniques presently in use. The rationale of the technique is explained. The format provides for a concise description of each technique, the physical principles involved, objectives of interrogation, example applications, limitations of each technique, a schematic illustration, and key reference material. Cross-index tabulations are also provided so that particular NDE problems can be referred to appropriate techniques.

  17. Seals and Sealing Techniques

    NASA Technical Reports Server (NTRS)

    1972-01-01

    Developments by the aerospace industry in seals and sealing techniques are announced for possible use in other areas. The announcements presented are grouped as: sealing techniques for cryogenic fluids, high pressure applications, and modification for improved performance.

  18. The radiocarbon hydroxyl technique

    NASA Technical Reports Server (NTRS)

    Campbell, Malcolm J.; Sheppard, John C.

    1994-01-01

    The Radiocarbon Technique depends upon measuring the rate of oxidation of CO in an essentially unperturbed sample of air. The airborne technique is slightly different. Hydroxyl concentrations can be calculated directly; peroxyl concentrations can be obtained by NO doping.

  19. PROGRAMME GROUP RESEARCH UPDATE: Biodiversity indicators &

    E-print Network

    1 PROGRAMME GROUP RESEARCH UPDATE: Biodiversity indicators & knowledge management programme group Introduction Duncan Ray The programme group Biodiversity Indicators and Knowledge Management (BIKM) was established by the merger of the Biodiversity Indicators & Evaluation Programme and the Decision Support

  20. Rangeland health attributes and indicators for qualitative assessment

    USGS Publications Warehouse

    Pyke, David A.; Herrick, J.E.; Pellant, Mike

    2002-01-01

    Panels of experts from the Society for Range Management and the National Research Council proposed that status of rangeland ecosystems could be ascertained by evaluating an ecological site's potential to conserve soil resources and by a series of indicators for ecosystem processes and site stability. Using these recommendations as a starting point, we developed a rapid, qualitative method for assessing a moment-in-time status of rangelands. Evaluators rate 17 indicators to assess 3 ecosystem attributes (soil and site stability, hydrologic function, and biotic integrity) for a given location. Indicators include rills, water flow patterns, pedestals and terracettes, bare ground, gullies, wind scour and depositional areas, litter movement, soil resistance to erosion, soil surface loss or degradation, plant composition relative to infiltration, soil compaction, plant functional/structural groups, plant mortality, litter amount, annual production, invasive plants, and reproductive capability. In this paper, we detail the development and evolution of the technique and introduce a modified ecological reference worksheet that documents the expected presence and amount of each indicator on the ecological site. In addition, we review the intended applications for this technique and clarify the differences between assessment and monitoring that lead us to recommend this technique be used for moment-in-time assessments and not be used for temporal monitoring of rangeland status. Lastly, we propose a mechanism for adapting and modifying this technique to reflect improvements in understanding of ecosystem processes. We support the need for quantitative measures for monitoring rangeland health and propose some measures that we believe may address some of the 17 indicators.

  1. 49 CFR 230.68 - Speed indicators.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders Speed Indicators § 230.68 Speed indicators. Steam locomotives that operate at speeds in excess...

  2. 49 CFR 230.68 - Speed indicators.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders Speed Indicators § 230.68 Speed indicators. Steam locomotives that operate at speeds in excess...

  3. 49 CFR 230.68 - Speed indicators.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders Speed Indicators § 230.68 Speed indicators. Steam locomotives that operate at speeds in excess...

  4. 49 CFR 230.68 - Speed indicators.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders Speed Indicators § 230.68 Speed indicators. Steam locomotives that operate at speeds in excess...

  5. 49 CFR 230.68 - Speed indicators.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ..., DEPARTMENT OF TRANSPORTATION STEAM LOCOMOTIVE INSPECTION AND MAINTENANCE STANDARDS Steam Locomotives and Tenders Speed Indicators § 230.68 Speed indicators. Steam locomotives that operate at speeds in excess...

  6. A Rat Model of Ventricular Fibrillation and Resuscitation by Conventional Closed-chest Technique.

    PubMed

    Lamoureux, Lorissa; Radhakrishnan, Jeejabai; Gazmuri, Raúl J

    2015-01-01

    A rat model of electrically-induced ventricular fibrillation followed by cardiac resuscitation using a closed chest technique that incorporates the basic components of cardiopulmonary resuscitation in humans is herein described. The model was developed in 1988 and has been used in approximately 70 peer-reviewed publications examining a myriad of resuscitation aspects including its physiology and pathophysiology, determinants of resuscitability, pharmacologic interventions, and even the effects of cell therapies. The model featured in this presentation includes: (1) vascular catheterization to measure aortic and right atrial pressures, to measure cardiac output by thermodilution, and to electrically induce ventricular fibrillation; and (2) tracheal intubation for positive pressure ventilation with oxygen enriched gas and assessment of the end-tidal CO2. A typical sequence of intervention entails: (1) electrical induction of ventricular fibrillation, (2) chest compression using a mechanical piston device concomitantly with positive pressure ventilation delivering oxygen-enriched gas, (3) electrical shocks to terminate ventricular fibrillation and reestablish cardiac activity, (4) assessment of post-resuscitation hemodynamic and metabolic function, and (5) assessment of survival and recovery of organ function. A robust inventory of measurements is available that includes - but is not limited to - hemodynamic, metabolic, and tissue measurements. The model has been highly effective in developing new resuscitation concepts and examining novel therapeutic interventions before their testing in larger and translationally more relevant animal models of cardiac arrest and resuscitation. PMID:25938619

  7. Evaluation of Mesoscale Model Phenomenological Verification Techniques

    NASA Technical Reports Server (NTRS)

    Lambert, Winifred

    2006-01-01

    Forecasters at the Spaceflight Meteorology Group, 45th Weather Squadron, and National Weather Service in Melbourne, FL use mesoscale numerical weather prediction model output in creating their operational forecasts. These models aid in forecasting weather phenomena that could compromise the safety of launch, landing, and daily ground operations and must produce reasonable weather forecasts in order for their output to be useful in operations. Considering the importance of model forecasts to operations, their accuracy in forecasting critical weather phenomena must be verified to determine their usefulness. The currently-used traditional verification techniques involve an objective point-by-point comparison of model output and observations valid at the same time and location. The resulting statistics can unfairly penalize high-resolution models that make realistic forecasts of a certain phenomena, but are offset from the observations in small time and/or space increments. Manual subjective verification can provide a more valid representation of model performance, but is time-consuming and prone to personal biases. An objective technique that verifies specific meteorological phenomena, much in the way a human would in a subjective evaluation, would likely produce a more realistic assessment of model performance. Such techniques are being developed in the research community. The Applied Meteorology Unit (AMU) was tasked to conduct a literature search to identify phenomenological verification techniques being developed, determine if any are ready to use operationally, and outline the steps needed to implement any operationally-ready techniques into the Advanced Weather Information Processing System (AWIPS). The AMU conducted a search of all literature on the topic of phenomenological-based mesoscale model verification techniques and found 10 different techniques in various stages of development. Six of the techniques were developed to verify precipitation forecasts, one to verify sea breeze forecasts, and three were capable of verifying several phenomena. The AMU also determined the feasibility of transitioning each technique into operations and rated the operational capability of each technique on a subjective 1-10 scale: (1) 1 indicates that the technique is only in the initial stages of development, (2) 2-5 indicates that the technique is still undergoing modifications and is not ready for operations, (3) 6-8 indicates a higher probability of integrating the technique into AWIPS with code modifications, and (4) 9-10 indicates that the technique was created for AWIPS and is ready for implementation. Eight of the techniques were assigned a rating of 5 or below. The other two received ratings of 6 and 7, and none of the techniques a rating of 9-10. At the current time, there are no phenomenological model verification techniques ready for operational use. However, several of the techniques described in this report may become viable techniques in the future and should be monitored for updates in the literature. The desire to use a phenomenological verification technique is widespread in the modeling community, and it is likely that other techniques besides those described herein are being developed, but the work has not yet been published. Therefore, the AMIU recommends that the literature continue to be monitored for updates to the techniques described in this report and for new techniques being developed whose results have not yet been published. 111

  8. Developments in functional neuroimaging techniques

    SciTech Connect

    Aine, C.J.

    1995-03-01

    A recent review of neuroimaging techniques indicates that new developments have primarily occurred in the area of data acquisition hardware/software technology. For example, new pulse sequences on standard clinical imagers and high-powered, rapidly oscillating magnetic field gradients used in echo planar imaging (EPI) have advanced MRI into the functional imaging arena. Significant developments in tomograph design have also been achieved for monitoring the distribution of positron-emitting radioactive tracers in the body (PET). Detector sizes, which pose a limit on spatial resolution, have become smaller (e.g., 3--5 mm wide) and a new emphasis on volumetric imaging has emerged which affords greater sensitivity for determining locations of positron annihilations and permits smaller doses to be utilized. Electromagnetic techniques have also witnessed growth in the ability to acquire data from the whole head simultaneously. EEG techniques have increased their electrode coverage (e.g., 128 channels rather than 16 or 32) and new whole-head systems are now in use for MEG. But the real challenge now is in the design and implementation of more sophisticated analyses to effectively handle the tremendous amount of physiological/anatomical data that can be acquired. Furthermore, such analyses will be necessary for integrating data across techniques in order to provide a truly comprehensive understanding of the functional organization of the human brain.

  9. Newer lumbar interbody fusion techniques.

    PubMed

    Nasca, Richard J

    2013-01-01

    The purpose of this review is to update the reader on more recent, less invasive lumbar interbody fusion procedures. The article contains a brief history on the development of lumbar interbody fusion methods, as well as the indications and descriptions of the various open and minimally invasive procedures, their complications, and outcomes. In contrast to the more traditional open methods of performing anterior and posterior interbody fusions, surgeons doing the less invasive techniques of transforaminal lumbar interbody fusion, extreme lateral and direct lateral interbody fusion, and the presacral axial approach are reporting less morbidity, shorter hospital stays, high rates of fusion, and improved patient outcomes. Although each technique has a different anatomical plane of approach, the goal is to achieve a solid interbody fusion of the pain generating segment(s) without complications. PMID:23628562

  10. DC KIDS COUNT e-Databook Indicators

    ERIC Educational Resources Information Center

    DC Action for Children, 2012

    2012-01-01

    This report presents indicators that are included in DC Action for Children's 2012 KIDS COUNT e-databook, their definitions and sources and the rationale for their selection. The indicators for DC KIDS COUNT represent a mix of traditional KIDS COUNT indicators of child well-being, such as the number of children living in poverty, and indicators of…

  11. 34 CFR 361.84 - Performance indicators.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 34 Education 2 2010-07-01 2010-07-01 false Performance indicators. 361.84 Section 361.84 Education... Standards and Performance Indicators § 361.84 Performance indicators. (a) The performance indicators establish what constitutes minimum compliance with the evaluation standards. (b) The performance...

  12. Visualization Techniques for Single Channel DPF Systems

    SciTech Connect

    Dillon, Heather E.; Maupin, Gary D.; Carlson, Shelley J.; Saenz, Natalio T.; Gallant, Thomas R.

    2007-04-01

    New techniques have been developed to visualize soot deposition in both traditional and new diesel particulate filter (DPF) substrate materials using a modified cyanoacrylate fuming technique. Loading experiments have been conducted on a variety of single channel DPF substrates to develop a deeper understanding of soot penetration, soot deposition characteristics, and to confirm modeling results. Early results indicate that stabilizing the soot layer using a vapor adhesive may allow analysis of the layer with new methods.

  13. Technique as a Consideration in Modern Dance Injuries.

    ERIC Educational Resources Information Center

    Solomon, Ruth L.; Micheli, Lyle J.

    1986-01-01

    The many different techniques of modern dance each make unique demands on the dancer's body. A study of 164 modern dancers compared injury sites and frequency with the dance technique. Results indicate technique is a factor in injuries. (Author/MT)

  14. Evaluation of a native vegetation masking technique

    NASA Technical Reports Server (NTRS)

    Kinsler, M. C.

    1984-01-01

    A crop masking technique based on Ashburn's vegetative index (AVI) was used to evaluate native vegetation as an indicator of crop moisture condition. A mask of the range areas (native vegetation) was generated for each of thirteen Great Plains LANDSAT MSS sample segments. These masks were compared to the digitized ground truth and accuracies were computed. An analysis of the types of errors indicates a consistency in errors among the segments. The mask represents a simple quick-look technique for evaluating vegetative cover.

  15. Indications and approach to surgical resection of lung metastases.

    PubMed

    Kaifi, Jussuf T; Gusani, Niraj J; Deshaies, Isabelle; Kimchi, Eric T; Reed, Michael F; Mahraj, Rickhesvar P; Staveley-O'Carroll, Kevin F

    2010-08-01

    Pulmonary metastasectomy is a curative option for selected patients with cancer spread to the lungs. Complete surgical removal of pulmonary metastases can improve survival and is recommended under certain criteria. Specific issues that require consideration in a multidisciplinary setting when planning pulmonary metastasectomy include: adherence to established indications for resection, the surgical strategy including the use of minimally invasive techniques, pulmonary parenchyma preservation, and the role of lymphadenectomy. PMID:20648593

  16. Subspace Hamiltonian Technique 

    E-print Network

    Allen, Roland E.; MENON, M.

    1986-01-01

    VOLUME 33, NUMBER 8 Subspace Hamiltonian technique 15 APRIL 1986 Roland E. Allen and Madhu Menon Department ofPhysics, Texas AckM University, College Station, Texas 77843 424-2 (Received 22 July 1985) The subspace Hamiltonian technique, introduced... simulations. %e prove several theorems and report numerical calculations that help to explain the usefulness of the technique in practical applications. I. INTRODUCTION Green's-function methods are useful for at least two reasons: (1) They often allow an N...

  17. Prefabricated composite veneers: historical perspectives, indications and clinical application.

    PubMed

    Dietschi, Didier; Devigus, Alessandro

    2011-01-01

    Veneering anterior teeth is a well-established technique, which was brought to Dentistry by Dr Pincus as early as 1937. From the mid-1970s, boosted by the development of composites and adhesive techniques, various concepts emerged including direct composite restorations, prefabricated composite veneers and of course, individualized porcelain indirect veneers. The prefabricated composite veneer option was however soon abandoned due to former technological limitations. Recently, the creation of a new shade guide comprising enamel shells revitalized this "old idea," and in combination with a high pressure and temperature molding process followed by a laser surface vitrification, a novel, improved composite prefabricated system (Venear, Edelweiss Dentistry) was born. This paper provides an overview of the potential indications and clinical protocol of this original veneering technique. PMID:21734966

  18. Bi-unicompartmental and combined uni plus patellofemoral replacement: indications and surgical technique

    PubMed Central

    ROMAGNOLI, SERGIO; MARULLO, MATTEO; MASSARO, MICHELE; RUSTEMI, ENIS; D’AMARIO, FEDERICO; CORBELLA, MICHELE

    2015-01-01

    The anatomy and orientation of the condyles and the trochlea are not standard, but related to morphotype, gender and race. Consequently, the extreme variability in their dimension, and in the distance and angle between the axis of the condyles and of the trochlea, often necessitates a “custom-made” replacement. This may be achieved through the use of small implants. Bicompartmental osteoarthritis with intact ligaments should be addressed with bi-unicompartmental (bi-UKR) or UKR plus patellofemoral replacement (PFR). These options allow selective replacement of the worn compartments and a customised fit of the small implants to the native knee anatomy. Clinical consequences are restoration of the native knee kinematics and overall better function. PMID:26151039

  19. Knee salvage procedures: The indications, techniques and outcomes of large osteochondral allografts

    PubMed Central

    Chui, Karen; Jeys, Lee; Snow, Martyn

    2015-01-01

    The overall incidence of osteochondral defect in the general population is estimated to be 15 to 30 per 100000 people. These lesions can become symptomatic causing pain, swelling and decreased function of the knee, and may eventually progress to osteoarthritis. In the young and active population, partial or total knee arthroplasty (TKA) is rarely the treatment of choice due to risk of early failure. Osteochondral allograft transplantation has been demonstrated to be a safe and effective treatment of large osteochondral and chondral defects of the knee in appropriately selected patients. The treatment reduces pain, improves function and is a viable limb salvage procedure for patients, especially young and active patients for whom TKA is not recommended. Either large dowels generated with commercially available equipment or free hand shell allografts can be implanted in more posterior lesions. Current recommendations for fresh allografts stored at 4C advise implantation within 21-28 d of procurement for optimum chondrocyte viability, following screening and testing protocols. Higher rates of successful allograft transplantation are observed in younger patients, unipolar lesions, normal or corrected malalignment, and defects that are treated within 12 mo of symptom onset. Patients with bipolar lesions, uncorrectable malalignment, advanced osteoarthritis, and those over 40 tend to have less favourable outcomes. PMID:25893177

  20. Different techniques of static/dynamic guided implant surgery: modalities and indications.

    PubMed

    Vercruyssen, Marjolein; Fortin, Thomas; Widmann, Gerlig; Jacobs, Reinhilde; Quirynen, Marc

    2014-10-01

    For computer-guided surgery a static surgical guide is used that transfers the virtual implant position from computerized tomographic data to the surgical site. These guides are produced by computer-aided design/computer-assisted manufacture technology, such as stereolithography, or manually in a dental laboratory (using mechanical positioning devices or drilling machines). With computer-navigated surgery the position of the instruments in the surgical area is constantly displayed on a screen with a three-dimensional image of the patient. In this way, the system allows real-time transfer of the preoperative planning and visual feedback on the screen. A workflow of the different systems is presented in this review. PMID:25123770

  1. Optical Techniques Nanomicroscopy

    E-print Network

    Fischer, Wolfgang

    Optical Techniques Nanomicroscopy Drug Development Medicinal Plants Sessions Nanomicroscopy Medical Biophysics Structure and Mechanics of F nction Medicinal Plants Nano Medicine Drug Encapsulation and Deli er

  2. Which is the easiest and safest technique for central venous access? A retrospective survey of more than 5,400 cases.

    PubMed

    Pittiruti, M; Malerba, M; Carriero, C; Tazza, L; Gui, D

    2000-01-01

    There is an ongoing debate on the technique for central venous catheterization associated with the lowest complication rate and the highest success rate. In an attempt to better define the easiest and safest venous approach, we have reviewed our 7-year experience with 5479 central venous percutaneous punctures (by Seldinger's technique) for the insertion of short-term (n=2109), medium/long-term (n=2627) catheters, as well as double-lumen, large-bore catheters for hemodialysis and/or hemapheresis (n=743). We have analyzed the incidence of the most frequent in-sertion-related complications by comparing seven different venous approaches: jugular vein, low lateral approach; jugular vein, high lateral approach; jugular vein, low axial approach; subclavian vein, infraclavicular approach; subclavian vein, supraclavicular approach; external jugular vein; femoral vein. The results of our retrospective study suggest that the 'low lateral' approach to the internal jugular vein, as described by Jernigan and modified according to our protocol, appears to be the easiest and safest technique for percutaneous insertion of central venous access, being characterized by the lowest incidence of accidental arte-rial puncture (1.2%) and malposition (0.8%), no pneumothorax, and an extremely low rate of repeated attempts (i.e. more than two punctures before successful cannulation) (3.3%). We advocate the 'low lateral' approach to the internal jugular vein as first-choice technique for venipuncture in both adults and children, for both short-term and long-term central venous percutaneous cannulation. PMID:17638235

  3. Techniques for Teachers Section

    ERIC Educational Resources Information Center

    Tait, A., Ed.

    1973-01-01

    Includes a simple technique to demonstrate Millikan's oil drop experiment, an environmental studies experiment to measure dissolved oxygen in water samples, and a technique to demonstrate action-reaction. Science materials described are the Pol-A-Star Tomiscope, Nuffield chemistry film loops, air pucks and pH meters. (JR)

  4. Contamination Control Techniques

    SciTech Connect

    EBY, J.L.

    2000-05-16

    Welcome to a workshop on contamination Control techniques. This work shop is designed for about two hours. Attendee participation is encouraged during the workshop. We will address different topics within contamination control techniques; present processes, products and equipment used here at Hanford and then open the floor to you, the attendees for your input on the topics.

  5. Emerging optical nanoscopy techniques

    PubMed Central

    Montgomery, Paul C; Leong-Hoi, Audrey

    2015-01-01

    To face the challenges of modern health care, new imaging techniques with subcellular resolution or detection over wide fields are required. Far field optical nanoscopy presents many new solutions, providing high resolution or detection at high speed. We present a new classification scheme to help appreciate the growing number of optical nanoscopy techniques. We underline an important distinction between superresolution techniques that provide improved resolving power and nanodetection techniques for characterizing unresolved nanostructures. Some of the emerging techniques within these two categories are highlighted with applications in biophysics and medicine. Recent techniques employing wider angle imaging by digital holography and scattering lens microscopy allow superresolution to be achieved for subcellular and even in vivo, imaging without labeling. Nanodetection techniques are divided into four subcategories using contrast, phase, deconvolution, and nanomarkers. Contrast enhancement is illustrated by means of a polarized light-based technique and with strobed phase-contrast microscopy to reveal nanostructures. Very high sensitivity phase measurement using interference microscopy is shown to provide nanometric surface roughness measurement or to reveal internal nanometric structures. Finally, the use of nanomarkers is illustrated with stochastic fluorescence microscopy for mapping intracellular structures. We also present some of the future perspectives of optical nanoscopy. PMID:26491270

  6. Simulation verification techniques study

    NASA Technical Reports Server (NTRS)

    Schoonmaker, P. B.; Wenglinski, T. H.

    1975-01-01

    Results are summarized of the simulation verification techniques study which consisted of two tasks: to develop techniques for simulator hardware checkout and to develop techniques for simulation performance verification (validation). The hardware verification task involved definition of simulation hardware (hardware units and integrated simulator configurations), survey of current hardware self-test techniques, and definition of hardware and software techniques for checkout of simulator subsystems. The performance verification task included definition of simulation performance parameters (and critical performance parameters), definition of methods for establishing standards of performance (sources of reference data or validation), and definition of methods for validating performance. Both major tasks included definition of verification software and assessment of verification data base impact. An annotated bibliography of all documents generated during this study is provided.

  7. A gas flow indicator for portable life support systems

    NASA Technical Reports Server (NTRS)

    Bass, R. L., III; Schroeder, E. C.

    1975-01-01

    A three-part program was conducted to develop a gas flow indicator (GFI) to monitor ventilation flow in a portable life support system. The first program phase identified concepts which could potentially meet the GFI requirements. In the second phase, a working breadboard GFI, based on the concept of a pressure sensing diaphragm-aneroid assembly connected to a venturi, was constructed and tested. Extensive testing of the breadboard GFI indicated that the design would meet all NASA requirements including eliminating problems experienced with the ventilation flow sensor used in the Apollo program. In the third program phase, an optimized GFI was designed by utilizing test data obtained on the breadboard unit. A prototype unit was constructed using prototype materials and fabrication techniques, and performance tests indicated that the prototype GFI met or exceeded all requirements.

  8. Laplacian Estrada and normalized Laplacian Estrada indices of evolving graphs.

    PubMed

    Shang, Yilun

    2015-01-01

    Large-scale time-evolving networks have been generated by many natural and technological applications, posing challenges for computation and modeling. Thus, it is of theoretical and practical significance to probe mathematical tools tailored for evolving networks. In this paper, on top of the dynamic Estrada index, we study the dynamic Laplacian Estrada index and the dynamic normalized Laplacian Estrada index of evolving graphs. Using linear algebra techniques, we established general upper and lower bounds for these graph-spectrum-based invariants through a couple of intuitive graph-theoretic measures, including the number of vertices or edges. Synthetic random evolving small-world networks are employed to show the relevance of the proposed dynamic Estrada indices. It is found that neither the static snapshot graphs nor the aggregated graph can approximate the evolving graph itself, indicating the fundamental difference between the static and dynamic Estrada indices. PMID:25822506

  9. Classroom Assessment Techniques

    NASA Astrophysics Data System (ADS)

    Narayanan, M.

    2003-12-01

    Provost David L. Potter of George Mason University chaired a joint task force and presented a report entitled ``Powerful Partnerships : A Shared Responsibility for Learnin'' in June 1998. The main goal is to make a difference in the quality of student learning. Further, it is important to assess this difference and document it. Clifford O. Young, Sr., & Laura Howzell Young of California State University, San Bernardino argue that a new paradigm for assessment, a learning paradigm, must be constructed to measure the success of new kinds of educational practices. Using two survey instruments, the Instruction Model Learning Model Questionnaire (IMLMQ) and the Student Evaluation of Teaching Effectiveness (SETE), they compared students' responses to the course when taught with traditional methods and with interactive methods. The results suggest that neither instrument effectively measures the kinds of learning promoted under the new paradigm. Linn, Baker, & Dunbar recommend that these newer assessment practices should be more authentic, that is, to involve students in the actual or simulated performance of a task or the documentation of the desired competency in a portfolio. Cerbin says that one of the most unfortunate consequences of a summative emphasis is that it inhibits open and productive discussions about teaching; in essence, it marginalizes the types of activity that could lead to better teaching (Cerbin, 1992). William Cerbin, who is the Director of the Center for Effective Teaching and learning, University Assessment Coordinator, and Professor of Psychology at the University of Wisconsin-LaCrosse is a recognized expert in the areas of cognition, language, and development. Edgerton, Hutchings, & Quinlan indicate that Teaching Portfolios may contain evidence of students' learning, but such information is optional, and when included, it may be only one of many pieces of material. Seldin, also supports this and stresses that the interplay between the instructor and the learner should be carefully observed and monitored. Forrest says that Student Portfolios, which document learning in more detail, seldom reveal how teaching contributes to students' progress. Cerbin further indicates that a course portfolio is essentially, a like a manuscript of scholarly work in progress. In this example, it is a work that explains what, how, and why students learn or do not learn in a course. In this paper, the author reports on a dozen techniques that could perhaps be used to document assessment of student learning. References : Cerbin, W. (1993). Fostering a culture of teaching as scholarship. The Teaching Professor, 7(3), 1-2. Edgerton, R., Hutchings, P., & Quinlan, P. (1991). The teaching portfolio: Capturing the scholarship in teaching. Washington, DC: American Association for Higher Education. Forrest, A. (1990). Time will tell: Portfolio-assisted assessment of general education. Washington, DC: American Association for Higher Education. Linn, R., Baker, E., & Dunbar, S. (1991). Complex, Performance-based Assessment: Expectations and Validation Criteria. Educational Researcher, 20 (8), 15-21. Narayanan, M. (2003). Assessment in Higher Education: Partnerships in Learning. Paper presented at the 23rd Annual Lilly Conference on College Teaching, Miami University, Oxford, OH. Seldin, P. (1991). The teaching portfolio. Bolton, MA: Anker. Young, C. O., Sr., & Young, L. H. (1999). Assessing Learning in Interactive Courses. Journal on Excellence in College Teaching, 10 (1), 63-76.

  10. THE MULTIDISCIPLINARY INFLUENCE OF COMMON SUSTAINABILITY INDICES

    EPA Science Inventory

    Sustainability is often poorly defined and difficult to measure. We describe several concepts based in ecology, economics, and physics that have contributed to sustainability indices, and discuss their positive and negative aspects. Indices range from mostly ecological (such as e...

  11. Performance indicator report for operation surety

    SciTech Connect

    1991-05-01

    This report for the month of May, 1991, summarizes performance indicators which are being monitored at the Pinellas Plant. These indicators range over maintenance related items, radiation incidents, overtime hours, hazardous spills, discharges of gases and liquids, etc.

  12. 47 CFR 73.258 - Indicating instruments.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Indicating instruments. 73.258 Section 73.258 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES FM Broadcast Stations § 73.258 Indicating instruments. (a) Each FM broadcast station shall be equipped with indicating instruments...

  13. 47 CFR 73.58 - Indicating instruments.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 4 2012-10-01 2012-10-01 false Indicating instruments. 73.58 Section 73.58 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) BROADCAST RADIO SERVICES RADIO BROADCAST SERVICES AM Broadcast Stations § 73.58 Indicating instruments. (a) Each AM broadcast station must be equipped with indicating instruments...

  14. 49 CFR 229.117 - Speed indicators.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 4 2010-10-01 2010-10-01 false Speed indicators. 229.117 Section 229.117... § 229.117 Speed indicators. (a) After December 31, 1980, each locomotive used as a controlling locomotive at speeds in excess of 20 miles per hour shall be equipped with a speed indicator which is—...

  15. Laboratory Indices of Nutritional Status in Pregnancy.

    ERIC Educational Resources Information Center

    National Academy of Sciences-National Research Council, Washington, DC. Food and Nutrition Board.

    This report reviews the current state of knowledge regarding laboratory indices of nutritional and metabolic status during normal pregnancy in order to provide normative data with respect to such indices in healthy pregnant women. The report contains seven chapters: Physiologic Adjustments in General; Hematologic Indices; Electrolytes in Normal…

  16. CFCC: A Report on Indicators of Excellence.

    ERIC Educational Resources Information Center

    Campion, William J.

    The planning and evaluation process at Central Florida Community College (CFCC) is based on the identification of demonstrable outcomes measures, referred to as indicators of excellence (IE's). The indicators were developed during a 4-year long, institution-wide effort in which every employee had the opportunity to comment on proposed indicators.…

  17. Choosing Aggregation Rules for Composite Indicators

    ERIC Educational Resources Information Center

    Munda, Giuseppe

    2012-01-01

    From a formal point of view, a composite indicator is an aggregate of all dimensions, objectives, individual indicators and variables used for its construction. This implies that what defines a composite indicator is the set of properties underlying its mathematical aggregation convention. In this article, I try to revise the theoretical debate on…

  18. Educational Indicators: Monitoring the State of Education.

    ERIC Educational Resources Information Center

    Educational Testing Service, Princeton, NJ.

    The l975 Educational Testing Service (ETS) Invitational Conference provided an overview of the social indicators movement, and the relationship between schooling and quality of life. The concept of educational indicators was discussed. Educational indicators are defined as statistics used to provide information regarding the status of particular…

  19. Facilities Performance Indicators Report, 2008-09

    ERIC Educational Resources Information Center

    Hills, Christina, Ed.

    2010-01-01

    This paper features another expanded Web-based Facilities Performance Indicators Report (FPI). The purpose of APPA's Facilities Performance Indicators is to provide a representative set of statistics about facilities in educational institutions. The 2008-09 iteration of the Web-based Facilities Performance Indicators Survey was posted and…

  20. 30 CFR 57.19009 - Position indicator.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Position indicator. 57.19009 Section 57.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... Hoists § 57.19009 Position indicator. An accurate and reliable indicator of the position of the...

  1. 30 CFR 57.19009 - Position indicator.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Position indicator. 57.19009 Section 57.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... Hoists § 57.19009 Position indicator. An accurate and reliable indicator of the position of the...

  2. 30 CFR 56.19009 - Position indicator.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Position indicator. 56.19009 Section 56.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... § 56.19009 Position indicator. An accurate and reliable indicator of the position of the cage,...

  3. 30 CFR 56.19009 - Position indicator.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Position indicator. 56.19009 Section 56.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... § 56.19009 Position indicator. An accurate and reliable indicator of the position of the cage,...

  4. 30 CFR 57.19009 - Position indicator.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Position indicator. 57.19009 Section 57.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... Hoists § 57.19009 Position indicator. An accurate and reliable indicator of the position of the...

  5. 30 CFR 56.19009 - Position indicator.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 30 Mineral Resources 1 2012-07-01 2012-07-01 false Position indicator. 56.19009 Section 56.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... § 56.19009 Position indicator. An accurate and reliable indicator of the position of the cage,...

  6. 30 CFR 56.19009 - Position indicator.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 30 Mineral Resources 1 2010-07-01 2010-07-01 false Position indicator. 56.19009 Section 56.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... § 56.19009 Position indicator. An accurate and reliable indicator of the position of the cage,...

  7. 30 CFR 56.19009 - Position indicator.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 30 Mineral Resources 1 2011-07-01 2011-07-01 false Position indicator. 56.19009 Section 56.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... § 56.19009 Position indicator. An accurate and reliable indicator of the position of the cage,...

  8. 30 CFR 57.19009 - Position indicator.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 30 Mineral Resources 1 2013-07-01 2013-07-01 false Position indicator. 57.19009 Section 57.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... Hoists § 57.19009 Position indicator. An accurate and reliable indicator of the position of the...

  9. 30 CFR 57.19009 - Position indicator.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 30 Mineral Resources 1 2014-07-01 2014-07-01 false Position indicator. 57.19009 Section 57.19009 Mineral Resources MINE SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR METAL AND NONMETAL MINE... Hoists § 57.19009 Position indicator. An accurate and reliable indicator of the position of the...

  10. Climate Indicators for Energy and Infrastructure

    NASA Astrophysics Data System (ADS)

    Wilbanks, T. J.

    2014-12-01

    Two of the key categories of climate indicators are energy and infrastructure. For energy supply and use, many indicators are available for energy supply and consumption; and some indicators are available to assess implications of climate change, such as changes over time in heating and cooling days. Indicators of adaptation and adaptive capacity are more elusive. For infrastructure, which includes more than a dozen different sectors, general indicators are not available, beyond counts of major disasters and such valuable contributions as the ASCE "report cards." In this case, research is needed, for example to develop credible metrics for assessing the resilience of built infrastructures to climate change and other stresses.

  11. Island custom blocking technique

    SciTech Connect

    Carabetta, R.J. )

    1988-03-01

    The technique of Island blocking is being used more frequently since the advent of our new head and neck blocking techniques and the implementation of a newly devised lung protocol. The system presented affords the mould room personnel a quick and accurate means of island block fabrication without the constant remeasuring or subtle shifting to approximate correct placement. The cookie cutter is easily implemented into any department's existing block cutting techniques. The device is easily and inexpensively made either in a machine shop or acquired by contacting the author.

  12. Electrical termination techniques

    NASA Technical Reports Server (NTRS)

    Oakey, W. E.; Schleicher, R. R.

    1976-01-01

    A technical review of high reliability electrical terminations for electronic equipment was made. Seven techniques were selected from this review for further investigation, experimental work, and preliminary testing. From the preliminary test results, four techniques were selected for final testing and evaluation. These four were: (1) induction soldering, (2) wire wrap, (3) percussive arc welding, and (4) resistance welding. Of these four, induction soldering was selected as the best technique in terms of minimizing operator errors, controlling temperature and time, minimizing joint contamination, and ultimately producing a reliable, uniform, and reusable electrical termination.

  13. Adaptive algebraic reconstruction technique

    SciTech Connect

    Lu Wenkai; Yin Fangfang

    2004-12-01

    Algebraic reconstruction techniques (ART) are iterative procedures for reconstructing objects from their projections. It is proven that ART can be computationally efficient by carefully arranging the order in which the collected data are accessed during the reconstruction procedure and adaptively adjusting the relaxation parameters. In this paper, an adaptive algebraic reconstruction technique (AART), which adopts the same projection access scheme in multilevel scheme algebraic reconstruction technique (MLS-ART), is proposed. By introducing adaptive adjustment of the relaxation parameters during the reconstruction procedure, one-iteration AART can produce reconstructions with better quality, in comparison with one-iteration MLS-ART. Furthermore, AART outperforms MLS-ART with improved computational efficiency.

  14. Right ventricular infarction: identification by hemodynamic measurements before and after volume loading and correlation with noninvasive techniques

    SciTech Connect

    Dell'Italia, L.J.; Starling, M.R.; Crawford, M.H.; Boros, B.L.; Chaudhuri, T.K.; O'Rourke, R.A.

    1984-11-01

    To evaluate the potential occurrence of right ventricular infarction, 53 patients with acute inferior transmural myocardial infarction were studied within 36 hours of symptoms by right heart catheterization, equilibrium radionuclide angiography and two-dimensional echocardiography. Technetium-99m pyrophosphate myocardial scintigraphy was performed 3 days after the onset of symptoms. The hemodynamic standard for right ventricular infarction was defined as both a right atrial pressure of 10 mm Hg or more and a right atrial/pulmonary artery wedge pressure ratio of 0.8 or more. Eight (15%) of the 53 patients had hemodynamic measurements at rest characteristic of right ventricular infarction, and 6 (11%) additional patients met these criteria after volume loading. Nineteen (37%) of the 51 patients who had radionuclide angiography had right ventricular dysfunction manifested by both a reduced right ventricular ejection fraction (less than 40%) and right ventricular regional wall motion abnormalities (akinesia or dyskinesia). An abnormal radionuclide angiogram was observed in 12 of 13 patients with hemodynamic measurements indicating right ventricular infarction. In 12 patients with an abnormal radionuclide angiographic study, right ventricular ejection fraction improved 6 to 12 weeks after infarction. Twenty-two (49%) of the 45 patients with adequate two-dimensional echocardiograms had a right ventricular regional wall motion abnormality. An abnormal two-dimensional echocardiogram was seen in 9 of 11 patients with hemodynamic measurements characteristic of right ventricular infarction. Technetium-99m pyrophosphate scintigraphy was positive for right ventricular infarction in 3 of 12 patients who had hemodynamic measurements indicating right ventricular infarction.

  15. Small Scale Organic Techniques

    ERIC Educational Resources Information Center

    Horak, V.; Crist, DeLanson R.

    1975-01-01

    Discusses the advantages of using small scale experimentation in the undergraduate organic chemistry laboratory. Describes small scale filtration techniques as an example of a semi-micro method applied to small quantities of material. (MLH)

  16. Analysis of Citric Acid in Beverages: Use of an Indicator Displacement Assay

    ERIC Educational Resources Information Center

    Umali, Alona P.; Anslyn, Eric V.; Wright, Aaron T.; Blieden, Clifford R.; Smith, Carolyne K.; Tian, Tian; Truong, Jennifer A.; Crumm, Caitlin E.; Garcia, Jorge E.; Lee, Soal; Mosier, Meredith; Nguyen, Chester P.

    2010-01-01

    The use of an indicator displacement assay permits the visualization of binding events between host and guest molecules. An undergraduate laboratory experiment is described to demonstrate the technique in the determination of citric acid content in commercially available beverages such as soda pop and fruit juices. Through the technique, students…

  17. Discovering Indicators of Successful Collaboration Using Tense: Automated Extraction of Patterns in Discourse

    ERIC Educational Resources Information Center

    Thompson, Kate; Kennedy-Clark, Shannon; Wheeler, Penny; Kelly, Nick

    2014-01-01

    This paper describes a technique for locating indicators of success within the data collected from complex learning environments, proposing an application of e-research to access learner processes and measure and track group progress. The technique combines automated extraction of tense and modality via parts-of-speech tagging with a visualisation…

  18. Evaluation of SuperMAG auroral electrojet indices as indicators of substorms and auroral power

    E-print Network

    Bergen, Universitetet i

    Evaluation of SuperMAG auroral electrojet indices as indicators of substorms and auroral power P. T, a generalization of the auroral electrojet indices calculated from 100 or more sites instead of the 12 used in the official auroral electrojet indices, AE(12) = AU(12) - AL(12). We investigate how these various indices

  19. Techniques for colorectal anastomosis

    PubMed Central

    Ho, Yik-Hong; Ashour, Mohamed Ahmed Tawfik

    2010-01-01

    Colorectal anastomotic leak remains one of the most feared post-operative complications, particularly after anterior resection of the rectum with, the shift from abdomino-peritoneal resections to total mesorectal excision and primary anastomosis. The literature fails to demonstrate superiority of stapled over hand-sewn techniques in colorectal anastomosis, regardless of the level of anastomosis, although a high stricture rate was noted in the former technique. Thus, improvements in safety aspects of anastomosis and alternatives to hand-sewn and stapled techniques are being sought. Here, we review alternative anastomotic techniques used to fashion bowel anastomosis. Compression anastomosis using compression anastomotic clips, endoluminal compression anastomotic rings, AKA-2, biofragmental anastomotic rings, or Magnamosis all involve the concept of creating a sutureless end-to-end anastomosis by compressing two bowel ends together, leading to a simultaneous necrosis and healing process that joins the two lumens. Staple line reinforcement is a new approach that reduce the drawbacks of staplers used in colorectal practice, i.e. leakage, bleeding, misfiring, and inadequate tissue approximation. Various non-absorbable, semi or fully absorbable materials are now available. Two other techniques can provide alternative anastomotic support to the suture line: a colorectal drain and a polyester stent, which can be utilized in ultra-low rectal excision and can negate the formation of a defunctioning stoma. Doxycycline coated sutures have been used to overcome the post-operative weakness in anastomosis secondary to rapid matrix degradation mediated by matrix metalloproteinase. Another novel technique, the electric welding system, showed promising results in construction of a safe, neat, smooth sutureless bowel anastomosis. Various anastomotic techniques have been shown to be comparable to the standard techniques of suturing and stapling. However, most of these alternatives need to be accepted and optimized for future use. PMID:20355239

  20. Apollo Onboard Navigation Techniques

    NASA Technical Reports Server (NTRS)

    Intervartolo, Michael

    2009-01-01

    This viewgraph presentation reviews basic navigation concepts, describes coordinate systems and identifies attitude determination techniques including Primary Guidance, Navigation and Control System (PGNCS) IMU management and Command and Service Module Stabilization and Control System/Lunar Module (LM) Abort Guidance System (AGS) attitude management. The presentation also identifies state vector determination techniques, including PGNCS coasting flight navigation, PGNCS powered flight navigation and LM AGS navigation.

  1. Next generation initiation techniques

    NASA Technical Reports Server (NTRS)

    Warner, Tom; Derber, John; Zupanski, Milija; Cohn, Steve; Verlinde, Hans

    1993-01-01

    Four-dimensional data assimilation strategies can generally be classified as either current or next generation, depending upon whether they are used operationally or not. Current-generation data-assimilation techniques are those that are presently used routinely in operational-forecasting or research applications. They can be classified into the following categories: intermittent assimilation, Newtonian relaxation, and physical initialization. It should be noted that these techniques are the subject of continued research, and their improvement will parallel the development of next generation techniques described by the other speakers. Next generation assimilation techniques are those that are under development but are not yet used operationally. Most of these procedures are derived from control theory or variational methods and primarily represent continuous assimilation approaches, in which the data and model dynamics are 'fitted' to each other in an optimal way. Another 'next generation' category is the initialization of convective-scale models. Intermittent assimilation systems use an objective analysis to combine all observations within a time window that is centered on the analysis time. Continuous first-generation assimilation systems are usually based on the Newtonian-relaxation or 'nudging' techniques. Physical initialization procedures generally involve the use of standard or nonstandard data to force some physical process in the model during an assimilation period. Under the topic of next-generation assimilation techniques, variational approaches are currently being actively developed. Variational approaches seek to minimize a cost or penalty function which measures a model's fit to observations, background fields and other imposed constraints. Alternatively, the Kalman filter technique, which is also under investigation as a data assimilation procedure for numerical weather prediction, can yield acceptable initial conditions for mesoscale models. The third kind of next-generation technique involves strategies to initialize convective scale (non-hydrostatic) models.

  2. Sensitivity Analysis of Dynamic Stability Indicators in Power Systems

    SciTech Connect

    Nguyen, Tony B.; Pai, M. A.

    2006-01-01

    Real time stability evaluation and preventive scheduling in power systems offers many challenges in a stressed power system. Through fast simulation of contingencies in real time it is possible to extract suitable information from the data and develop reliable metrics or indices to evaluate proximity of the system to an unstable condition. In this chapter we review the recent applications of the trajectory sensitivity analysis (TSA) technique in developing such indicators. Trajectory sensitivities can be used to compute critical parameters such as clearing time of circuit breakers, tie line flow, etc. in a power system by developing suitable norms for ease of interpretation. Alternatively it can be used along with the notion of Principal Singular Surfaces (PSS) to detect mode of instability (MOI). The TSA technique has the advantage that model complexity is not a limitation and the sensitivities are computed numerically. Suitable metrics are developed from these sensitivities. In addition to computing critical parameters, the TSA technique can be extended to do preventive rescheduling. A brief discussion of other applications of TSA is included as well as future areas of research.

  3. Efficient binning for bitmap indices on high-cardinality attributes

    SciTech Connect

    Rotem, Doron; Stockinger, Kurt; Wu, Kesheng

    2004-11-17

    Bitmap indexing is a common technique for indexing high-dimensional data in data warehouses and scientific applications. Though efficient for low-cardinality attributes, query processing can be rather costly for high-cardinality attributes due to the large storage requirements for the bitmap indices. Binning is a common technique for reducing storage costs of bitmap indices. This technique partitions the attribute values into a number of ranges, called bins, and uses bitmap vectors to represent bins (attribute ranges) rather than distinct values. Although binning may reduce storage costs, it may increase the access costs of queries that do not fall on exact bin boundaries (edge bins). For this kind of queries the original data values associated with edge bins must be accessed, in order to check them against the query constraints.In this paper we study the problem of finding optimal locations for the bin boundaries in order to minimize these access costs subject to storage constraints. We propose a dynamic programming algorithm for optimal partitioning of attribute values into bins that takes into account query access patterns as well as data distribution statistics. Mathematical analysis and experiments on real life data sets show that the optimal partitioning achieved by this algorithm can lead to a significant improvement in the access costs of bitmap indexing systems for high-cardinality attributes.

  4. Identifying performance indicators for family practice

    PubMed Central

    Barnsley, Jan; Berta, Whitney; Cockerill, Rhonda; MacPhail, Judith; Vayda, Eugene

    2005-01-01

    OBJECTIVE To identify performance indicators for family practice that focus on organizational structures and clinical processes of care, to review evidence linking indicators to patient outcomes, to have providers select indicators they consider important for performance assessment, and to obtain provider views on challenges to developing a performance assessment system. DESIGN Review of published and unpublished literature and contact with international experts resulted in a list of 131 structure and process indicators and associated evidence. This information was used in a two-round modified Delphi consensus process, which was followed by interviews with each of the 12 consensus panel members. SETTING Ontario family practices. PARTICIPANTS Eleven family physicians and one nurse practitioner from Ontario. MAIN OUTCOME MEASURES Survey package with 131 indicators and associated evidence was mailed to panel members who rated each of the indicators on a Likert scale from 1 (not at all important for performance assessment) to 9 (essential for performance assessment). Interviews were conducted with panel members to discuss indicator feasibility and data sources. Consensus score and median importance score for each indicator were main outcome measures; interviews identified barriers to performance assessment. RESULTS Fifty-one indicators achieved high consensus, 19 moderate consensus, and 38 low consensus. Clinical indicators that reached a high level of consensus were generally supported by grade A or B recommendations and level I to III evidence. Clinical indicators that achieved moderate consensus often had fair support in the literature. Low consensus was mainly associated with fair or equivocal evidence. During follow-up interviews, consensus panel members voiced frustration with inconsistencies in the evidence and practice guidelines upon which indicators are often based, and with poor transfer of patient information between health care providers. Lack of detail in patient care documentation and inconsistent documentation were mentioned frequently as threats to data quality. CONCLUSION Despite challenges to performance measurement noted by the panel, study results support the continued development, refinement, and testing of primary care performance indicators. PMID:16926927

  5. Maximum-likelihood estimation for indicator dilution analysis.

    PubMed

    Kuenen, Maarten P J; Herold, Ingeborg H F; Korsten, Hendrikus H M; de la Rosette, Jean J M C H; Wijkstra, Hessel; Mischi, Massimo

    2014-03-01

    Indicator-dilution methods are widely used by many medical imaging techniques and by dye-, lithium-, and thermodilution measurements. The measured indicator dilution curves are typically fitted by a mathematical model to estimate the hemodynamic parameters of interest. This paper presents a new maximum-likelihood algorithm for parameter estimation, where indicator dilution curves are considered as the histogram of underlying transit-time distribution. Apart from a general description of the algorithm, semianalytical solutions are provided for three well-known indicator dilution models. An adaptation of the algorithm is also introduced to cope with indicator recirculation. In simulations as well as in experimental data obtained by dynamic contrast-enhanced ultrasound imaging, the proposed algorithm shows a superior parameter estimation accuracy over nonlinear least-squares regression. The feasibility of the algorithm for use in vivo is evaluated using dynamic contrast-enhanced ultrasound recordings obtained with the purpose of prostate cancer detection. The proposed algorithm shows an improved ability (increase in receiver-operating characteristic curve area of up to 0.13) with respect to existing methods to differentiate between healthy tissue and cancer. PMID:24239967

  6. March 2011 Physical Indicators Workshop Summary Report

    NASA Technical Reports Server (NTRS)

    Roberts, Brent

    2011-01-01

    The National Climate Assessment (NCA) convened a workshop on Physical Climate Indicators from 29-30 March 2011, as part of a series on Monitoring Climate Change and its Impacts . The overarching goal of this workshop was to identify a few broad categories of potential physical climate indicators using a set of priorities developed by the NCA, and to provide a clear justification for how they would inform the Nation about climate change. Additional goals included providing input on the overall NCA framework for selecting the indicators and suggesting methodologies to construct indicators. Although one of the workshop goals was to address the status of current observational networks to support indicators, this was not a main focus of any single discussion. However, participants agreed with the NCA indicator vision that high quality data were needed to develop indicators, and generally focused on identifying indicator categories that current observation systems could support. The nearly 60 participants, primarily from Federal agencies, received a white paper in advance of the workshop that detailed the NCA vision for a coordinated suite of climate-related physical, ecological, and societal indicators. The intent of these national indicators of change is to develop a way to evaluate and communicate over time both the rate of change in impacts and the capacity to respond to climate drivers. These indicators will be tracked as a part of ongoing, long-term assessment activities, with adjustments as necessary to adapt to changing conditions and understanding. An initial framework was provided to workshop participants to ensure that everyone understood the audience, scope, and purpose of the indicators. A common lexicon was defined since indicator terminology varies widely. In addition, several potential approaches to grouping or categorizing the indicators were presented. Participants spent most of their time in small breakout groups with facilitators, working to address a common set of questions. The workshop was structured to start with the broadest issue and then focus down as the workshop progressed. The first breakout therefore solicited comments on the NCA indicator framework, followed by discussion of the potential approaches to organizing the physical climate indicators. Once several approaches were identified, the groups then worked to define specific measurements, or types of measurements, that could be used to create the indicators.

  7. Monitoring activity in neural circuits with genetically encoded indicators

    PubMed Central

    Broussard, Gerard J.; Liang, Ruqiang; Tian, Lin

    2014-01-01

    Recent developments in genetically encoded indicators of neural activity (GINAs) have greatly advanced the field of systems neuroscience. As they are encoded by DNA, GINAs can be targeted to genetically defined cellular populations. Combined with fluorescence microscopy, most notably multi-photon imaging, GINAs allow chronic simultaneous optical recordings from large populations of neurons or glial cells in awake, behaving mammals, particularly rodents. This large-scale recording of neural activity at multiple temporal and spatial scales has greatly advanced our understanding of the dynamics of neural circuitry underlying behavior—a critical first step toward understanding the complexities of brain function, such as sensorimotor integration and learning. Here, we summarize the recent development and applications of the major classes of GINAs. In particular, we take an in-depth look at the design of available GINA families with a particular focus on genetically encoded calcium indicators (GCaMPs), sensors probing synaptic activity, and genetically encoded voltage indicators. Using the family of the GCaMP as an example, we review established sensor optimization pipelines. We also discuss practical considerations for end users of GINAs about experimental methods including approaches for gene delivery, imaging system requirements, and data analysis techniques. With the growing toolbox of GINAs and with new microscopy techniques pushing beyond their current limits, the age of light can finally achieve the goal of broad and dense sampling of neuronal activity across time and brain structures to obtain a dynamic picture of brain function. PMID:25538558

  8. Safety models incorporating graph theory based transit indicators.

    PubMed

    Quintero, Liliana; Sayed, Tarek; Wahba, Mohamed M

    2013-01-01

    There is a considerable need for tools to enable the evaluation of the safety of transit networks at the planning stage. One interesting approach for the planning of public transportation systems is the study of networks. Network techniques involve the analysis of systems by viewing them as a graph composed of a set of vertices (nodes) and edges (links). Once the transport system is visualized as a graph, various network properties can be evaluated based on the relationships between the network elements. Several indicators can be calculated including connectivity, coverage, directness and complexity, among others. The main objective of this study is to investigate the relationship between network-based transit indicators and safety. The study develops macro-level collision prediction models that explicitly incorporate transit physical and operational elements and transit network indicators as explanatory variables. Several macro-level (zonal) collision prediction models were developed using a generalized linear regression technique, assuming a negative binomial error structure. The models were grouped into four main themes: transit infrastructure, transit network topology, transit route design, and transit performance and operations. The safety models showed that collisions were significantly associated with transit network properties such as: connectivity, coverage, overlapping degree and the Local Index of Transit Availability. As well, the models showed a significant relationship between collisions and some transit physical and operational attributes such as the number of routes, frequency of routes, bus density, length of bus and 3+ priority lanes. PMID:22831497

  9. Energy conservation indicators. 1982 annual report

    SciTech Connect

    Belzer, D.B.

    1982-09-01

    A series of Energy Conservation Indicators were developed for the Department of Energy to assist in the evaluation of current and proposed conservation strategies. As descriptive statistics that signify current conditions and trends related to efficiency of energy use, indicators provide a way of measuring, monitoring, or inferring actual responses by consumers in markets for energy services. Related sets of indicators are presented in some 40 one-page indicator summaries. Indicators are shown graphically, followed by several paragraphs that explain their derivation and highlight key findings. Indicators are classified according to broad end-use sectors: Aggregate (economy), Residential, Commercial, Industrial, Transportation and Electric Utilities. In most cases annual time series information is presented covering the period 1960 through 1981.

  10. Reliability of indicators of decline in abundance.

    PubMed

    Porszt, Erin J; Peterman, Randall M; Dulvy, Nicholas K; Cooper, Andrew B; Irvine, James R

    2012-10-01

    Although there are many indicators of endangerment (i.e., whether populations or species meet criteria that justify conservation action), their reliability has rarely been tested. Such indicators may fail to identify that a population or species meets criteria for conservation action (false negative) or may incorrectly show that such criteria have been met (false positive). To quantify the rate of both types of error for 20 commonly used indicators of declining abundance (threat indicators), we used receiver operating characteristic curves derived from historical (1938-2007) data for 18 sockeye salmon (Oncorhynchus nerka) populations in the Fraser River, British Columbia, Canada. We retrospectively determined each population's yearly status (reflected by change in abundance over time) on the basis of each indicator. We then compared that population's status in a given year with the status in subsequent years (determined by the magnitude of decline in abundance across those years). For each sockeye population, we calculated how often each indicator of past status matched subsequent status. No single threat indicator provided error-free estimates of status, but indicators that reflected the extent (i.e., magnitude) of past decline in abundance (through comparison of current abundance with some historical baseline abundance) tended to better reflect status in subsequent years than the rate of decline over the previous 3 generations (a widely used indicator). We recommend that when possible, the reliability of various threat indicators be evaluated with empirical analyses before such indicators are used to determine the need for conservation action. These indicators should include estimates from the entire data set to take into account a historical baseline. PMID:22741815

  11. [Indications for ambulatory therapy of alcohol dependence].

    PubMed

    John, U

    1993-01-01

    The aim of the contribution is the discussion of client characteristics in regard to the indication of alcohol dependence outpatient therapy. In a first part issues of outpatient compared with inpatient treatment, in a second part results concerning indication criteria are presented. The third part shows differentiating factors in regard to the indication criteria and outcome of the clients. This part includes reabstinence, the ability to reach the goal of abstinence after relapse, the help of significant others, and arguments for the understanding of indication criteria in a broad sense. PMID:8212773

  12. The main indicators for Iranian hospital ethical accreditation

    PubMed Central

    ENJOO, SEYED ALI; AMINI, MITRA; TABEI, SEYED ZIAADIN; MAHBUDI, ALI; KAVOSI, ZAHRA; SABER, MAHBOOBEH

    2015-01-01

    Introduction The application of organizational ethics in hospitals is one of the novel ways to improve medical ethics. Nowadays achieving efficient and sufficient ethical hospital indicators seems to be inevitable. In this connection, the present study aims to determine the best indicators in hospital accreditation. Methods 69 indicators in 11 fields to evaluate hospital ethics were achieved through a five-step qualitative and quantitative study including literature review, expert focus group, Likert scale survey, 3 rounded Delphi, and content validity measurement. Expert focus group meeting was conducted, employing Nominal Group Technique (NGT). After running NGT, a three rounded Delphi and parallel to Delphi and a Likert scale survey were performed to obtain objective indicators for each domain. The experts were all healthcare professionals who were also medical ethics researchers, teachers, or PhD students. Content validity measurements were computed, using the viewpoints of two different expert groups, some ethicists, and some health care professionals (n=46). Results After conducting NGT, Delphi, Likert survey, 11 main domains were listed including:  Informed consent, Medical confidentiality, Physician-patient economic relations, Ethics consultation policy in the hospital, Ethical charter of hospital, Breaking bad medical news protocol, Respect for the patients’ rights, Clinical ethics committee, Spiritual and palliative care unit programs in the hospitals, Healthcare professionals’ communication skills, and Equitable access to the healthcare. Also 71 objective indicators for these 11 domains were listed in 11 tables with 5 to 8 indicators per table. Content Validity Ratio (CVR) measurements were done and 69 indicators were highlighted. Conclusion The domains listed in this study seem to be the most important ones for evaluating hospital ethics programs and services. Healthcare organizations’ accreditation and ranking are crucial for the improvement of healthcare services. Ethics programs would also motivate hospitals to improve their services and move towards patients’ satisfaction. In this regard, more involvement of bioethicists can help healthcare organizations to develop ethics programs and ensure ethics-based practice in hospitals. PMID:26269789

  13. ISIM3D: AN ANSI-C THREE-DIMENSIONAL MULTIPLE INDICATOR CONDITIONAL SIMULATION PROGRAM

    EPA Science Inventory

    The indicator conditional simulation technique provides stochastic simulations of a variable that (i) honor the initial data and (ii) can feature a richer family of spatial structures not limited by Gaussianity. he data are encoded into a series of indicators which then are used ...

  14. Sensorimotor System Measurement Techniques

    PubMed Central

    Riemann, Bryan L.; Myers, Joseph B.; Lephart, Scott M.

    2002-01-01

    Objective: To provide an overview of currently available sensorimotor assessment techniques. Data Sources: We drew information from an extensive review of the scientific literature conducted in the areas of proprioception, neuromuscular control, and motor control measurement. Literature searches were conducted using MEDLINE for the years 1965 to 1999 with the key words proprioception, somatosensory evoked potentials, nerve conduction testing, electromyography, muscle dynamometry, isometric, isokinetic, kinetic, kinematic, posture, equilibrium, balance, stiffness, neuromuscular, sensorimotor, and measurement. Additional sources were collected using the reference lists of identified articles. Data Synthesis: Sensorimotor measurement techniques are discussed with reference to the underlying physiologic mechanisms, influential factors and locations of the variable within the system, clinical research questions, limitations of the measurement technique, and directions for future research. Conclusions/Recommendations: The complex interactions and relationships among the individual components of the sensorimotor system make measuring and analyzing specific characteristics and functions difficult. Additionally, the specific assessment techniques used to measure a variable can influence attained results. Optimizing the application of sensorimotor research to clinical settings can, therefore, be best accomplished through the use of common nomenclature to describe underlying physiologic mechanisms and specific measurement techniques. PMID:16558672

  15. Digital vibration control techniques

    NASA Technical Reports Server (NTRS)

    Chapman, P.; Kim, B. K.; Boctor, W.

    1974-01-01

    Analog vibration control techniques are reviewed and are compared with digital techniques. The advantages of the digital methods over the analog methods are demonstrated. The following topics are covered: (1) methods of computer-controlled random vibration and reverberation acoustic testing; (2) methods of computer-controlled sinewave vibration testing; and (3) methods of computer-controlled shock testing. Basic concepts are stressed rather than specific techniques or equipment. General algorithms are described in the form of block diagrams and flow diagrams. Specific problems and potential problems are discussed. The material is computer sciences oriented but is kept at a level that facilitates an understanding of the basic concepts of computer-controlled induced environmental test systems.

  16. 34 CFR 361.84 - Performance indicators.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    .... (i) Performance Indicator 1.1. The number of individuals exiting the VR program who achieved an... VR program after achieving an employment outcome during the previous performance period. (ii) Performance Indicator 1.2. Of all individuals who exit the VR program after receiving services, the...

  17. 34 CFR 361.84 - Performance indicators.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    .... (i) Performance Indicator 1.1. The number of individuals exiting the VR program who achieved an... VR program after achieving an employment outcome during the previous performance period. (ii) Performance Indicator 1.2. Of all individuals who exit the VR program after receiving services, the...

  18. 34 CFR 361.84 - Performance indicators.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    .... (i) Performance Indicator 1.1. The number of individuals exiting the VR program who achieved an... VR program after achieving an employment outcome during the previous performance period. (ii) Performance Indicator 1.2. Of all individuals who exit the VR program after receiving services, the...

  19. 34 CFR 361.84 - Performance indicators.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    .... (i) Performance Indicator 1.1. The number of individuals exiting the VR program who achieved an... VR program after achieving an employment outcome during the previous performance period. (ii) Performance Indicator 1.2. Of all individuals who exit the VR program after receiving services, the...

  20. Performance Indicators and University Distance Education Providers.

    ERIC Educational Resources Information Center

    Shale, Doug; Gomes, Jean

    1998-01-01

    Discusses problems with using performance measures for distance education that are meant for traditional education, based on experiences at the Open University/Open College of British Columbia and Athabasca University in Alberta (Canada). Considers performance indicators and accountability, and suggests indicators more appropriate for distance…

  1. INDICATORS OF ECOSYSTEM INTEGRITY FOR ESTUARIES

    EPA Science Inventory

    Jordan, Stephen J. and Lisa M. Smith. In press. Indicators of Ecosystem Integrity for Estuaries. In: Proceedings of the Estuarine Indicators Workshop, 29-31 October 2003, Sanibel Island, FL. Sanibel-Captiva Conservation Foundation, Sanibel, FL. 23 p. (ERL,GB 1194).

    Ideal ...

  2. Community Interests and Indicator System Success

    ERIC Educational Resources Information Center

    Holden, Meg

    2009-01-01

    Testing the validity of indicator systems is a task almost always left to the scientific community, in standard practice and in keeping with the quest for objectivity prevalent in politics and in society as a whole. This paper calls for a reinvigorated agenda within indicators research to question this practice and develop alternative…

  3. Composite Indicators between Analysis and Advocacy

    ERIC Educational Resources Information Center

    Saltelli, Andrea

    2007-01-01

    We explore to what extent composite indicators, capable of aggregating multi-dimensional processes into simplified, stylised concepts, are up to the task of underpinning the development of data-based narratives for political advocacy. A recent OECD working paper (Nardo et al., 2005, Handbook on constructing composite indicators: methodology and…

  4. Life Potential as a Basic Demographic Indicator

    ERIC Educational Resources Information Center

    Goerlich, Francisco J.; Soler, Angel

    2013-01-01

    This paper proposes an indicator that integrates life expectancy with the demographic structure of the population for a given society. By doing this, we have a simple indicator of mortality and aging combined, which could be very useful for developed societies. As is widely known, life expectancy at birth is independent of the demographic…

  5. Model Selection Indices for Polytomous Items

    ERIC Educational Resources Information Center

    Kang, Taehoon; Cohen, Allan S.; Sung, Hyun-Jung

    2009-01-01

    This study examines the utility of four indices for use in model selection with nested and nonnested polytomous item response theory (IRT) models: a cross-validation index and three information-based indices. Four commonly used polytomous IRT models are considered: the graded response model, the generalized partial credit model, the partial credit…

  6. Climate Change Indicators for the United States

    EPA Science Inventory

    EPA’s publishes the Climate Change Indicators for the United States report to communicate information about the science and impacts of climate change, track trends in environmental quality, and inform de¬cision-making. This report presents a set of key indicators to help readers ...

  7. Selection of the Argentine indicator region

    NASA Technical Reports Server (NTRS)

    Ramirez, C. J.; Reed, C. R. (principal investigators)

    1982-01-01

    Determined from available Argentine crop statistics, selection of the Indicator Region was based on the highest wheat, corn, and soybean producing provinces, which were: Buenos Aires, Cordoba, Entre Rios, and Santa Fe. Each province in Argentina was examined for the availability of LANDSAT data; area, yield and production statistics; crop calendars; and other ancillary data. The Argentine Indicator Region is described.

  8. INDICATORS OF SOCIAL AND ECONOMIC VULNERABILITY TO

    E-print Network

    Bateman, Ian J.

    INDICATORS OF SOCIAL AND ECONOMIC VULNERABILITY TO CLIMATE CHANGE IN VIETNAM by W. Neil Adger CSERGE Working Paper GEC 98-02 #12;INDICATORS OF SOCIAL AND ECONOMIC VULNERABILITY TO CLIMATE CHANGE Programme, under the project `Socio-economic and Physical Approaches to Vulnerability to Climate Change

  9. MACROPHAGE AGGREGATES AS INDICATORS OF ENVIRONMENTAL STRESS

    EPA Science Inventory

    The growing awareness of adverse effects of environmental contamination has lead to scrutiny of various biomarkers as early indicators of these effects. he use of splenic macrophage aggregates (MA) as indicators of fish health and environmental degradation was evaluated using thr...

  10. Comparing southern P indices to runoff data

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Forty-eight states in the U.S. have decided to use phosphorus (P) Indices to meet the requirements of their NRCS Code 590 Standard. The majority of the states chose to develop these Indices without consultation or coordination with neighboring states in order to meet specific local conditions and p...

  11. Quality measurement indicators for Iranian Health Centers

    PubMed Central

    Moslehi, Shandiz; Atefi Manesh, Pezhman; Sarabi Asiabar, Ali

    2015-01-01

    Background: Recently, quality is a serious concern in development of organizations. There are various indicators to assess quality and the purpose of this study was to identify the main indicators for quality measurement of Iranian health centers. Methods: This qualitative study was conducted in three stages: first, review of the literature was performed to identify different indicators for quality measurement in health centers; second, a tworound Delphi process was used with participation of 18 experts in both rounds; third, Analytical Hierarchy Process (AHP) method was applied to give weights to each indicator. Results: Twenty-seven indicators were identified from the literature review stage. The Delphi method reduced the list to 4 indicators. Developing a quality plan in the health center had the highest weight (38%) and percentage of followed complaints the lowest (12%). The consistency rate was 7.2% indicating appropriateness of the data. Conclusion: This list of indicators can be used as a template for measuring quality of health centers in Iran and possibly in other developing countries. PMID:26034730

  12. INDICATORS OF GREAT BASIN RANGELAND HEALTH

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Early-warning indicators of rangeland health can be used to estimate the functional integrity of a site and may allow sustainable management of desert rangelands. The utility of several vegetation canopy-based indicators of rangeland health at 32 Great Basin rangeland locations was investigated. T...

  13. Fingerprint Quality Indices for Predicting Authentication Performance

    E-print Network

    Dass, Sarat C.

    Fingerprint Quality Indices for Predicting Authentication Performance Yi Chen1 , Sarat Dass2 of an automatic fingerprint authentication system relies heavily on the quality of the captured fingerprint images. In this paper, two new quality indices for fingerprint images are devel- oped. The first index measures

  14. INTERPRETING INDICATORS OF RANGELAND HEALTH, VERSION 4

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Land managers are in need of an assessment tool that provides a preliminary evaluation of rangeland health. Interpreting Indicators of Rangeland Health, Version 4 is the second published version of a protocol that uses 17 easily observed indicators summarized as three rangeland health attributes (s...

  15. The Exploration of Indicators of Imagination

    ERIC Educational Resources Information Center

    Liang, Chaoyun; Chang, Chi-Cheng; Chang, Yuhsuan; Lin, Li-Jhong

    2012-01-01

    Although early studies in the fields of education and psychology appreciated the value of imagination, little work has been done pertaining to indicators of imagination. This study synthesized early works on imagination done between 1900 and 2011 to clarify its meaning and identify potential indicators. Then, two groups of samples were collected…

  16. Technical guidance for assessing phosphorus indices

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Disparate nutrient and land management recommendations generated by P Indices among states, a perceived lack of change in P-based management, and persistent P loading problems in many of the nation’s waters, led to a revision of the 590 Standard. The revision requires an assessment of P Indices acro...

  17. GIFT, ZIFT, and related techniques.

    PubMed

    Abyholm, T; Tanbo, T

    1993-10-01

    This review focuses on the theoretical backgrounds for tubal gamete and zygote/embryo transfer, as well as the clinical results of gamete intrafallopian transfer (GIFT), which are compared with other non-fertilization procedures in infertile women with patent fallopian tubes. While GIFT and zygote intrafallopian transfer (ZIFT) probably result in a more synchronized entry of embryos into the uterine cavity, prospective, randomized studies have not shown these methods to be preferable to conventional in-vitro fertilization and embryo transfer. Nevertheless, co-culture with various cell types seems to yield more viable embryos with a high rate of implantation. The promising results with co-culture do not seem to be a cell- or species-specific phenomenon. This non-specific positive or negative conditioning effect of co-culture on embryo quality indicates that more optimal culture media for in-vitro fertilization can probably be devised. The requirements of laparoscopy and general anesthesia with GIFT have prompted the development of simpler methods based on fertilization in vivo. Various methods of artificial insemination combined with controlled ovarian hyperstimulation yield comparable results with GIFT in unexplained infertility. In endometriosis, GIFT seems to give better results compared with insemination techniques. Less invasive transcervical gamete and embryo transfer techniques have now been established, obviating the need for operating theater facilities. PMID:8241437

  18. Voltage stability and controllability indices for multimachine power systems

    SciTech Connect

    Vournas, C.D.

    1995-08-01

    This paper presents a voltage stability index (VSI) and a voltage controllability index (VCI), related to the eigenvalues of mxm matrices in a multimachine power system made up of m synchronous generators and a number of infinite buses. System loads can have an arbitrary voltage sensitivity described by generalized voltage exponents. These nonlinear loads are linearized around an operating point and incorporated into a modified admittance matrix, which is subsequently reduced to the generator terminals using an efficient algorithm and sparsity techniques. The indices proposed are tested in a practical system and it is demonstrated that they provide a timely warning during a sequence of events leading to voltage collapse.

  19. [Moderately severe kidney injuries. Changes in therapeutic indications].

    PubMed

    Biserte, J; Mazeman, E; Lemaitre, L; Bertrand, P

    1996-01-01

    The choice of treatment for moderately severe blunt trauma to the kidney is a controversial issue. Modern imaging techniques, especially computed tomography and more recently 3-D imaging, have greatly improved analysis of the lesions. Ultrasonography and computed tomography allow for precise noninvasive follow-up, widening indications for non-surgical management. The question is raised as to whether retarding surgery may have a consequence on the development of late complications which were long the reason for routine surgical treatment in case of infection, urinary extravasation, large interfragment gaps, or devascularization. PMID:8945842

  20. Microencapsulation of Corrosion Indicators for Smart Coatings

    NASA Technical Reports Server (NTRS)

    Li, Wenyan; Buhrow, Jerry W.; Jolley, Scott T.; Calle, Luz M.; Hanna,Joshua S.; Rawlins, James W.

    2011-01-01

    A multifunctional smart coating for the autonomous detection, indication, and control of corrosion is been developed based on microencapsulation technology. This paper summarizes the development, optimization, and testing of microcapsules specifically designed for early detection and indication of corrosion when incorporated into a smart coating. Results from experiments designed to test the ability of the microcapsules to detect and indicate corrosion, when blended into several paint systems, show that these experimental coatings generate a color change, indicative of spot specific corrosion events, that can be observed with the naked eye within hours rather than the hundreds of hours or months typical of the standard accelerated corrosion test protocols.. Key words: smart coating, corrosion detection, microencapsulation, microcapsule, pH-sensitive microcapsule, corrosion indicator, corrosion sensing paint

  1. The Broadening Functions Technique

    NASA Astrophysics Data System (ADS)

    Rucinski, Slavek M.

    2012-04-01

    Essential assumptions and features of the Broadening Function (BF) technique are presented. A distinction between BF determination and the BF concept and utilization is made. The BF's can be determined in various ways. The approach based on linear deconvolution involving stellar templates, as used during the DDO program (1999 - 2008) is described, but the LSD technique would also give excellent results. The BF concept to prove and/or verify photometric light-curve solutions has so far been very limited to only a few W UMa-type binaries, with AW UMa giving particularly unexpected results.

  2. Carbon isotope techniques

    SciTech Connect

    Coleman, D.C. ); Fry, B. )

    1991-01-01

    This book is a hands-on introduction to using carbon isotope tracers in experimental biology and ecology. It is a bench-top reference with protocols for the study of plants, animals, and soils. The {sup 11}C, {sup 12}C, {sup 13}C, and {sup 14}C carbon isotopes are considered and standard techniques are described by established authors. The compilation includes the following features: specific, well-established, user-oriented techniques; carbon cycles in plants, animals, soils, air, and water; isotopes in ecological research; examples and sample calculations.

  3. An empirical, graphical, and analytical study of the relationship between vegetation indices. [derived from LANDSAT data

    NASA Technical Reports Server (NTRS)

    Lautenschlager, L.; Perry, C. R., Jr. (principal investigators)

    1981-01-01

    The development of formulae for the reduction of multispectral scanner measurements to a single value (vegetation index) for predicting and assessing vegetative characteristics is addressed. The origin, motivation, and derivation of some four dozen vegetation indices are summarized. Empirical, graphical, and analytical techniques are used to investigate the relationships among the various indices. It is concluded that many vegetative indices are very similar, some being simple algebraic transforms of others.

  4. An Entangled Model for Sustainability Indicators

    PubMed Central

    Cedano, Karla G.; Martínez, Manuel; Jensen, Henrik J.

    2015-01-01

    Nowadays the challenge for humanity is to find pathways towards sustainable development. Decision makers require a set of sustainability indicators to know if the sustainability strategies are following those pathways. There are more than one hundred sustainability indicators but they differ on their relative importance according to the size of the locality and change on time. The resources needed to follow these sustainability indicators are scarce and in some instances finite, especially in smaller regions. Therefore strategies to select set of these indicators are useful for decision makers responsible for monitoring sustainability. In this paper we propose a model for the identification and selection of a set of sustainability indicators that adequately represents human systems. In developing this model, we applied evolutionary dynamics in a space where sustainability indicators are fundamental entities interconnected by an interaction matrix. we used a fixed interaction that simulates the current context for the city of Cuernavaca, México as an example. We were able to identify and define relevant sets indicators for the system by using the Pareto principle. In this case we identified a set of sixteen sustainability indicators with more than 80% of the total strength. This set presents resilience to perturbations. For the Tangled Nature framework we provided a manner of treating different contexts (i.e., cities, counties, states, regions, countries, continents or the whole planet), dealing with small dimensions. This model provides decision makers with a valuable tool to select sustainability indicators set for towns, cities, regions, countries, continents or the entire planet according to a coevolutionary framework. The social legitimacy can arise from the fact that each individual indicator must be selected from those that are most important for the subject community. PMID:26295948

  5. An Entangled Model for Sustainability Indicators.

    PubMed

    Vázquez, Pável; Del Río, Jesús A; Cedano, Karla G; Martínez, Manuel; Jensen, Henrik J

    2015-01-01

    Nowadays the challenge for humanity is to find pathways towards sustainable development. Decision makers require a set of sustainability indicators to know if the sustainability strategies are following those pathways. There are more than one hundred sustainability indicators but they differ on their relative importance according to the size of the locality and change on time. The resources needed to follow these sustainability indicators are scarce and in some instances finite, especially in smaller regions. Therefore strategies to select set of these indicators are useful for decision makers responsible for monitoring sustainability. In this paper we propose a model for the identification and selection of a set of sustainability indicators that adequately represents human systems. In developing this model, we applied evolutionary dynamics in a space where sustainability indicators are fundamental entities interconnected by an interaction matrix. we used a fixed interaction that simulates the current context for the city of Cuernavaca, México as an example. We were able to identify and define relevant sets indicators for the system by using the Pareto principle. In this case we identified a set of sixteen sustainability indicators with more than 80% of the total strength. This set presents resilience to perturbations. For the Tangled Nature framework we provided a manner of treating different contexts (i.e., cities, counties, states, regions, countries, continents or the whole planet), dealing with small dimensions. This model provides decision makers with a valuable tool to select sustainability indicators set for towns, cities, regions, countries, continents or the entire planet according to a coevolutionary framework. The social legitimacy can arise from the fact that each individual indicator must be selected from those that are most important for the subject community. PMID:26295948

  6. 49 CFR 176.704 - Requirements relating to transport indices and criticality safety indices.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 49 Transportation 2 2010-10-01 2010-10-01 false Requirements relating to transport indices and criticality safety indices. 176.704 Section 176.704 Transportation Other Regulations Relating to... Requirements relating to transport indices and criticality safety indices. (a) The sum of the transport...

  7. A Titration Technique for Demonstrating a Magma Replenishment Model.

    ERIC Educational Resources Information Center

    Hodder, A. P. W.

    1983-01-01

    Conductiometric titrations can be used to simulate subduction-setting volcanism. Suggestions are made as to the use of this technique in teaching volcanic mechanisms and geochemical indications of tectonic settings. (JN)

  8. [Radiological exploration of the thorax. Strategy and indications].

    PubMed

    Arrivé, L; Nahum, H

    1994-05-21

    The widespread use of computed tomography and the advent of magnetic resonance imagery have considerably modified the methods and strategies of thoracic exploration over the last 10 years. Standard radiography remains the first-line examination for all thoracic diseases, and often is the only imagery required; further explorations are indicated on the basis of the information seen on standard films. Computed tomography has become an essential element in the work-up of all diseases involving a tumoural process in the lung. It is also indicated in bronchiestasis and for the exploration of chronic lung diseases. Further information may be obtained with magnetic resonance imagery. Although this method cannot be used to explore the pulmonary parenchyma, it is particularly adapted in cases involving the pleura, mediastinum (tumours and vessels) and the thoracic wall. Scintigraphy is mainly used to detect pulmonary migrations and to investigate lung function before thoracic surgery. Pulmonary angiography remains the reference imagery for the diagnosis of pulmonary embolism but has lost its other indications. Tomobronchography is exceptionally required. Current strategy in infectious diseases is to always begin with standard radiography, then to complete the work-up with further examinations only when necessary. Correct evaluation of tumoural processes relies heavily on tomography even for very small masses since it provides essential information on localization and extension. Management of primary bronchogenic cancers also requires repeated tomographic studies. Magnetic resonance images are indicated on the basis of the tomography results and are particularly useful in tumours of the apex and extension to the spinal column or mediastinum. For chronic bronchopathy, pulmonary scintigraphy is performed after standard films in the preoperative work-up then is sometimes completed with other techniques. In cases of suspected pulmonary emboli, a normal scintigraphy can eliminate the diagnosis. Inversely, certain teams propose coupling perfusion scintigraphy with ventilation scintigraphy to detect mismatches, particularly distinctive signs of pulmonary emboli. When the diagnosis remains uncertain, pulmonary angiography is the reference imagery technique. PMID:7937620

  9. September 2006 FORENSIC TECHNIQUES

    E-print Network

    SECURITY INCIDENTS FORENSIC TECHNIQUES: HELPING ORGANIZATIONS IMPROVE THEIR RESPONSES TO INFORMATION SECURITY INCIDENTS Shirley Radack, EditorShirley Radack, Editor Computer Security DivisionComputer Security of science to the identification, collection, examination, and analysis of data in ways that preserve

  10. Creating Interaction Techniques by

    E-print Network

    Myers, Brad A.

    Creating Interaction Techniques by Demonstration Brad A. Myers University of ]bronto* Peridot interfaces. A previous article' presented an overview of Peridot, concentrating on how the static displays of the user interface can be specified by demonstration. The full description of Peridot and the research

  11. DATA ANALYSIS TECHNIQUES

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Food scientists use standards and calibrations to relate the concentration of a compound of interest to the instrumental response. The techniques used include classical, single point, and inverse calibrations, as well as standard addition and internal standards. Several fundamental criteria -- sel...

  12. FACILITIES INSTRUCTIONS, STANDARDS, & TECHNIQUES

    E-print Network

    Laughlin, Robert B.

    FACILITIES INSTRUCTIONS, STANDARDS, & TECHNIQUES VOLUME 2-5 TURBINE REPAIR Internet Version of This Manual Created September 2000 FACILITIES ENGINEERING BRANCH ENGINEERING DIVISION DENVER OFFICE DENVER to the repair of hydraulic turbine runners and large pump impellers. Reclamation operates and maintains a wide

  13. Art Appreciation and Technique.

    ERIC Educational Resources Information Center

    Dean, Diane R.; Milam, Debora

    1985-01-01

    Presents examples of independent study units for gifted high school students in a resource room setting. Both art appreciation and technique are covered in activities concerned with media (basics of pencil, India ink, pastels, crayons, oil, acrylics, and watercolors), subject matter (landscapes, animals, the human figure), design and illustration…

  14. Music: Instrumental Techniques, Conducting.

    ERIC Educational Resources Information Center

    Grozan, Carl

    A course in introduction to the conducting of music groups of voices or instruments is presented. The approach used is a laboratory approach in which pupils will develop skills in score reading, physical gestures, rehearsal techniques, transpositions, voice and instrument ranges. Course objectives include: (1) The pupil will identify all…

  15. Super Techniques for Teachers.

    ERIC Educational Resources Information Center

    Foley, Michael K.

    A variety of techniques can help a teacher create the atmosphere of a "quality circle," a Japanese management method in which each member of a group shares and contributes to the learning experience. "Creating a Commercial" allows students to create original oratory for presentation to the class. In "The Good News First," students improve their…

  16. Techniques for Numerical Difficulties

    E-print Network

    Louvet, Violaine

    waves, ...), example in medicine Dynamics involving many species and reactions : complex chemistry Solution with high gradients Time and space multi-scales problems #12;Splitting Techniques for Low Mach2C) Chemical "waves" (spiral waves, scroll waves, ...), example in medicine Dynamics involving many

  17. Counseling Couples: Cognitive Techniques.

    ERIC Educational Resources Information Center

    Berman, Ellen M., Ed.

    1982-01-01

    Contains six articles illustrating techniques used in working with adult dyads at the Marriage Council of Philadelphia. Describes cognitive therapy, values analysis, and individual interview methods. Discusses effects of rape on couple adjustment, interrelationships of sexual adjustment and marital satisfaction, and a 20-year longitudinal study of…

  18. Mathematical techniques: A compilation

    NASA Technical Reports Server (NTRS)

    1975-01-01

    Articles on theoretical and applied mathematics are introduced. The articles cover information that might be of interest to workers in statistics and information theory, computational aids that could be used by scientists and engineers, and mathematical techniques for design and control.

  19. Blood Typing--Technique.

    ERIC Educational Resources Information Center

    Johnstone, W. T., Jr.

    This instructional packet deals with the study of hematology. It is recommended for all high school students of biology. A general understanding of antigen-antibody reactions is necessary before attempting this learning activity. Behavioral objectives place emphasis on the techniques of and understanding of blood typing. The equipment and…

  20. Correlative Techniques in Microscopy

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Imaging is an important component in basic research, product development and understanding structure/function relationships in agricultural commodities and products. An array of microscopes and techniques can be used illustrate the structure and microchemistry of diverse samples. Examples of the var...

  1. Assessing Classroom Assessment Techniques

    ERIC Educational Resources Information Center

    Simpson-Beck, Victoria

    2011-01-01

    Classroom assessment techniques (CATs) are teaching strategies that provide formative assessments of student learning. It has been argued that the use of CATs enhances and improves student learning. Although the various types of CATs have been extensively documented and qualitatively studied, there appears to be little quantitative research…

  2. Murine Kidney Transplant Technique.

    PubMed

    Plenter, Robert; Jain, Swati; Ruller, Chelsea M; Nydam, Trevor L; Jani, Alkesh H

    2015-01-01

    The first mouse kidney transplant technique was published in 1973(1) by the Russell laboratory. Although it took some years for other labs to become proficient in and utilize this technique, it is now widely used by many laboratories around the world. A significant refinement to the original technique using the donor aorta to form the arterial anastomosis instead of the renal artery was developed and reported in 1993 by Kalina and Mottram (2) with a further advancement coming from the same laboratory in 1999 (3). While one can become proficient in this model, a search of the literature reveals that many labs still experience a high proportion of graft loss due to arterial thrombosis. We describe here a technique that was devised in our laboratory that vastly reduces the arterial thrombus reported by others (4,5). This is achieved by forming a heel-and-toe cuff of the donor infra-renal aorta that facilitates a larger anastomosis and straighter blood flow into the kidney. PMID:26555373

  3. Moving Towards Leading Indicators for Global Change

    NASA Astrophysics Data System (ADS)

    Janetos, A.

    2014-12-01

    The development and implementation of a national indicators network relevant to climate change, impacts, and response options has taken advantage of the scientific expertise of a large number of disciplines related to global change. Like many previous and current indicators networks, this effort is focused on describing changes in the condition of a small number of indicators of current status and condition of important resources and processes. But an additional challenge remains, which is critically important for indicators that are meant to be used not only scientifically, but also to inform decision-makers: how should we think about indicators that are meant to impart information on future trajectories of the Earth system? In this presentation, I examine two different ways in which this might be accomplished - first is the use of leading indicators that are measures of current conditions, but for which their change over time is strongly correlated with future directions. The second is the use of model-based indicators. Both have strengths and weaknesses, and we explore how each can be approached in the context of global change.

  4. Comparison of UTCI to selected thermal indices

    NASA Astrophysics Data System (ADS)

    Blazejczyk, Krzysztof; Epstein, Yoram; Jendritzky, Gerd; Staiger, Henning; Tinz, Birger

    2012-05-01

    Over the past century more than 100 indices have been developed and used to assess bioclimatic conditions for human beings. The majority of these indices are used sporadically or for specific purposes. Some are based on generalized results of measurements (wind chill, cooling power, wet bulb temperature) and some on the empirically observed reactions of the human body to thermal stress (physiological strain, effective temperature). Those indices that are based on human heat balance considerations are referred to as "rational indices". Several simple human heat balance models are known and are used in research and practice. This paper presents a comparative analysis of the newly developed Universal Thermal Climate Index (UTCI), and some of the more prevalent thermal indices. The analysis is based on three groups of data: global data-set, synoptic datasets from Europe, and local scale data from special measurement campaigns of COST Action 730. We found the present indices to express bioclimatic conditions reasonably only under specific meteorological situations, while the UTCI represents specific climates, weather, and locations much better. Furthermore, similar to the human body, the UTCI is very sensitive to changes in ambient stimuli: temperature, solar radiation, wind and humidity. UTCI depicts temporal variability of thermal conditions better than other indices. The UTCI scale is able to express even slight differences in the intensity of meteorological stimuli.

  5. Comparison of UTCI to selected thermal indices.

    PubMed

    Blazejczyk, Krzysztof; Epstein, Yoram; Jendritzky, Gerd; Staiger, Henning; Tinz, Birger

    2012-05-01

    Over the past century more than 100 indices have been developed and used to assess bioclimatic conditions for human beings. The majority of these indices are used sporadically or for specific purposes. Some are based on generalized results of measurements (wind chill, cooling power, wet bulb temperature) and some on the empirically observed reactions of the human body to thermal stress (physiological strain, effective temperature). Those indices that are based on human heat balance considerations are referred to as "rational indices". Several simple human heat balance models are known and are used in research and practice. This paper presents a comparative analysis of the newly developed Universal Thermal Climate Index (UTCI), and some of the more prevalent thermal indices. The analysis is based on three groups of data: global data-set, synoptic datasets from Europe, and local scale data from special measurement campaigns of COST Action 730. We found the present indices to express bioclimatic conditions reasonably only under specific meteorological situations, while the UTCI represents specific climates, weather, and locations much better. Furthermore, similar to the human body, the UTCI is very sensitive to changes in ambient stimuli: temperature, solar radiation, wind and humidity. UTCI depicts temporal variability of thermal conditions better than other indices. The UTCI scale is able to express even slight differences in the intensity of meteorological stimuli. PMID:21614619

  6. DEVELOPMENT OF A CERAMIC TAMPER INDICATING SEAL: SRNL CONTRIBUTIONS

    SciTech Connect

    Krementz, D.; Brinkman, K.; Martinez-Rodriguez, M.; Mendez-Torres, A.; Weeks, G.

    2013-06-03

    Savannah River National Laboratory (SRNL) and Sandia National Laboratories (SNL) are collaborating on development of a Ceramic Seal, also sometimes designated the Intrinsically Tamper Indicating Ceramic Seal (ITICS), which is a tamper indicating seal for international safeguards applications. The Ceramic Seal is designed to be a replacement for metal loop seals that are currently used by the IAEA and other safeguards organizations. The Ceramic Seal has numerous features that enhance the security of the seal, including a frangible ceramic body, protective and tamper indicating coatings, an intrinsic unique identifier using Laser Surface Authentication, electronics incorporated into the seal that provide cryptographic seal authentication, and user-friendly seal wire capture. A second generation prototype of the seal is currently under development whose seal body is of Low Temperature Co-fired Ceramic (LTCC) construction. SRNL has developed the mechanical design of the seal in an iterative process incorporating comments from the SNL vulnerability review team. SRNL is developing fluorescent tamper indicating coatings, with recent development focusing on optimizing the durability of the coatings and working with a vendor to develop a method to apply coatings on a 3-D surface. SRNL performed a study on the effects of radiation on the electronics of the seal and possible radiation shielding techniques to minimize the effects. SRNL is also investigating implementation of Laser Surface Authentication (LSA) as a means of unique identification of each seal and the effects of the surface coatings on the LSA signature.

  7. Open Reduction Techniques for Supracondylar Humerus Fractures in Children.

    PubMed

    Wingfield, Jessica Jane; Ho, Christine Ann; Abzug, Joshua M; Ritzman, Todd F; Brighton, Brian K

    2015-12-01

    Supracondylar humerus fractures are the most common elbow fractures in children. Displaced supracondylar humerus fractures that are associated with neurologic and/or vascular injuries are treated with timely reduction through closed techniques. When closed techniques fail, reduction by open methods is indicated. Controversy exists as to which surgical approach yields the best outcomes in terms of cosmetic and functional results, while minimizing postoperative complications. Open reduction, when indicated, has been shown to yield good outcomes when closed reduction methods fail. PMID:26507292

  8. Three Cs in Measurement Models: Causal Indicators, Composite Indicators, and Covariates

    PubMed Central

    Bollen, Kenneth A.; Bauldry, Shawn

    2013-01-01

    In the last two decades attention to causal (and formative) indicators has grown. Accompanying this growth has been the belief that we can classify indicators into two categories, effect (reflective) indicators and causal (formative) indicators. This paper argues that the dichotomous view is too simple. Instead, there are effect indicators and three types of variables on which a latent variable depends: causal indicators, composite (formative) indicators, and covariates (the “three Cs”). Causal indicators have conceptual unity and their effects on latent variables are structural. Covariates are not concept measures, but are variables to control to avoid bias in estimating the relations between measures and latent variable(s). Composite (formative) indicators form exact linear combinations of variables that need not share a concept. Their coefficients are weights rather than structural effects and composites are a matter of convenience. The failure to distinguish the “three Cs” has led to confusion and questions such as: are causal and formative indicators different names for the same indicator type? Should an equation with causal or formative indicators have an error term? Are the coefficients of causal indicators less stable than effect indicators? Distinguishing between causal and composite indicators and covariates goes a long way toward eliminating this confusion. We emphasize the key role that subject matter expertise plays in making these distinctions. We provide new guidelines for working with these variable types, including identification of models, scaling latent variables, parameter estimation, and validity assessment. A running empirical example on self-perceived health illustrates our major points. PMID:21767021

  9. Scintillation probe with photomultiplier tube saturation indicator

    DOEpatents

    Ruch, Jeffrey F. (Bethel Park, PA); Urban, David J. (Glassport, PA)

    1996-01-01

    A photomultiplier tube saturation indicator is formed by supplying a supplemental light source, typically an light emitting diode (LED), adjacent to the photomultiplier tube. A switch allows the light source to be activated. The light is forwarded to the photomultiplier tube by an optical fiber. If the probe is properly light tight, then a meter attached to the indicator will register the light from the LED. If the probe is no longer light tight, and the saturation indicator is saturated, no signal will be registered when the LED is activated.

  10. Experience with the CyberKnife for intracranial stereotactic radiosurgery: Analysis of dosimetry indices

    SciTech Connect

    Floriano, Alejandro Santa-Olalla, Iciar; Sanchez-Reyes, Alberto

    2014-04-01

    We evaluated coverage, dose homogeneity, dose conformity, and dose gradient in CyberKnife VSI treatment plans. Several dosimetric indices were calculated, and the results were compared with those of previous publications. The effect of target volume on the radiosurgical treatment indices selected was also investigated. The study population comprised the first 40 patients treated at our department from March 2011 to September 2012. Dosimetric indices were calculated and compared with published results for other frame-based and frameless intracranial stereotactic radiotherapy techniques. A comparison of the indices confirmed the ability of the CyberKnife VSI system to provide very high-quality dosing plans. The results were independent of target volume for coverage, homogeneity, and dose conformity. However, a dependence on target volume was observed for the dose-gradient indices analyzed. Based on the indices proposed, CyberKnife provides very good treatment plans and compares favorably with other techniques in most cases. However, greater consensus on the radiosurgery indices calculated would be desirable to facilitate comparison of the various techniques or the same techniques when applied by different users.

  11. Managerial Techniques in Educational Administration.

    ERIC Educational Resources Information Center

    Lane, John J.

    1983-01-01

    Management techniques developed during the past 20 years assume the rational bureaucratic model. School administration requires contingent techniques. Quality Circle, Theory Z, and the McKenzie 7-Framework are discussed as techniques to increase school productivity. (MD)

  12. EDITORIAL: Imaging systems and techniques Imaging systems and techniques

    NASA Astrophysics Data System (ADS)

    Yang, Wuqiang; Giakos, George; Nikita, Konstantina; Pastorino, Matteo; Karras, Dimitrios

    2009-10-01

    The papers in this special issue focus on providing the state-of-the-art approaches and solutions to some of the most challenging imaging areas, such as the design, development, evaluation and applications of imaging systems, measuring techniques, image processing algorithms and instrumentation, with an ultimate aim of enhancing the measurement accuracy and image quality. This special issue explores the principles, engineering developments and applications of new imaging systems and techniques, and encourages broad discussion of imaging methodologies, shaping the future and identifying emerging trends. The multi-faceted field of imaging requires drastic adaptation to the rapid changes in our society, economy, environment and technological evolution. There is an urgent need to address new problems, which tend to be either static but complex, or dynamic, e.g. rapidly evolving with time, with many unknowns, and to propose innovative solutions. For instance, the battles against cancer and terror, monitoring of space resources and enhanced awareness, management of natural resources and environmental monitoring are some of the areas that need to be addressed. The complexity of the involved imaging scenarios and demanding design parameters, e.g. speed, signal-to-noise ratio (SNR), specificity, contrast, spatial resolution, scatter rejection, complex background and harsh environments, necessitate the development of a multi-functional, scalable and efficient imaging suite of sensors, solutions driven by innovation, and operation on diverse detection and imaging principles. Efficient medical imaging techniques capable of providing physiological information at the molecular level present another important research area. Advanced metabolic and functional imaging techniques, operating on multiple physical principles, and using high-resolution, high-selectivity nano-imaging methods, quantum dots, nanoparticles, biomarkers, nanostructures, nanosensors, micro-array imaging chips and nano-clinics for optical diagnostics and targeted therapy, can play an important role in the diagnosis and treatment of cancer. These techniques can also be used to provide efficient drug delivery for treatment of other diseases, with increased sensitivity and specificity. Similarly, enhanced stand-off detection, classification, identification and surveillance techniques, for comprehensive civilian and military target protection and enhanced space situational awareness can open new frontiers of research and applications in the defence arena and homeland security. For instance, the development of potential imaging sensor architectures, enhanced remote sensing systems, ladars, lidars and radars can provide data capable of ensuring continuous monitoring of various imaging/physical/chemical parameters under different operating conditions, using both active and passive detection principles, reconfigurable and scalable focal plane array architectures, reliable systems for stand-off detection of explosives, and enhanced airport security. The above areas pose challenging problems to the technical community and indicate an ever-growing need for innovative and auspicious solutions. We would like to thank all authors for their valuable contributions, without which this special issue would not have become reality.

  13. Application of the Overclaiming Technique to Scholastic Assessment

    ERIC Educational Resources Information Center

    Paulhus, Delroy L.; Dubois, Patrick J.

    2014-01-01

    The overclaiming technique is a novel assessment procedure that uses signal detection analysis to generate indices of knowledge accuracy (OC-accuracy) and self-enhancement (OC-bias). The technique has previously shown robustness over varied knowledge domains as well as low reactivity across administration contexts. Here we compared the OC-accuracy…

  14. Using Music Therapy Techniques To Treat Teacher Burnout.

    ERIC Educational Resources Information Center

    Cheek, James R.; Bradley, Loretta J.; Parr, Gerald; Lan, William

    2003-01-01

    This study was conducted to determine the effectiveness of music therapy techniques as an intervention for teacher burnout. Results of the study indicated that teachers who participated in school-based counseling groups, using music therapy techniques in conjunction with cognitive behavioral interventions, reported lower levels of burnout symptoms…

  15. The Altitude Effect on Air Speed Indicators

    NASA Technical Reports Server (NTRS)

    Hersey, M D; Hunt, F L; Eaton, H N

    1921-01-01

    The object of this report is to present the results of a theoretical and experimental study of the effect, on the performance of air speed indicators, of the different atmospheric conditions experienced at various altitudes.

  16. Lipoprotein metabolism indicators improve cardiovascular risk prediction

    Technology Transfer Automated Retrieval System (TEKTRAN)

    Background: Cardiovascular disease risk increases when lipoprotein metabolism is dysfunctional. We have developed a computational model able to derive indicators of lipoprotein production, lipolysis, and uptake processes from a single lipoprotein profile measurement. This is the first study to inves...

  17. DIATOMS: POWERFUL INDICATORS OF ENVIRONMENTAL CHANGE

    EPA Science Inventory

    Diatoms are being used increasingly to assess short- and long-term environmental change, because they are informative, versatile, flexible, and powerful ecological indicators. iatoms respond rapidly to changes in many ecological characteristics. ssemblages are usually diverse and...

  18. COMPLEX FOREST DYNAMICS INDICATE POTENTIAL FOR

    E-print Network

    Pennycook, Steve

    COMPLEX FOREST DYNAMICS INDICATE POTENTIAL FOR SLOWING CARBON ACCUMULATION IN THE SOUTHEASTERN for Forest Products Survey and Analytics, Blacksburg, VA 2USFS Center for Integrated Forest Science, Raleigh, weather, insects & diseases · Anthropogenic: effects of forest management (primarily cutting) 3. Provides

  19. Turn Indicator Model Overview Jan Peleska1

    E-print Network

    Peleska, Jan - Fachbereich 3

    switch on the dashboard. Signal in IgnSwitch {0, 6} denotes the current status of the ignition switch the emergency flash switch indicator on the dashboard should be activated, and tim FL {0, 1} is the on

  20. ESTUARINE PALEOPRODUCTIVITY: A COMPARISON OF THREE INDICATORS

    EPA Science Inventory

    Studies of paleoproductivity have documented anthropogenic impacts on lakes and estuaries - but use of multiple measures of productivity is rare. We compare three measures used as indicators of paleo-primary productivity: sedimentary concentrations of dinoflagellate cysts, biogen...