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1

Kinematic simulation of fracture reduction and bone deformity correction under unilateral external fixation  

Microsoft Academic Search

Combined kinematic analysis and graphic models of two unilateral external fixators are presented to simulate and visualize the correction of bone fracture deformities through systematic adjustments of the fixator joints. The models were developed as rigid linkage systems, and the analysis utilized the 4×4 transformation matrices and the kinematic chain theory to obtain the necessary rotations and translations at each

Yoon Hyuk Kim; Nozomu Inoue; Edmund Y. S. Chao

2002-01-01

2

Clinical and gait analysis of 171 unilateral calcaneal fractures.  

PubMed

INTRODUCTION:: Reviewing the management of calcaneus fractures, conservative and operative treatment are known without a generally accepted, well proven therapeutical strategy or tactics compared to other types of fractures. The purpose of this study is to define the parameters of the differences between the fractured calcaneus and the intact one, as well as the two types of treatments using the gait analysis method. MATERIALS AND METHODS:: Retrospective clinical investigation and gait analysis have been performed on 217 patients with calcaneus fractures. An analysis of the X-rays was also included. The Novel 101 B pedobarography analyser with platform 102H (4 sensor/cm(2)) was used for pressure distribution analysis. The region of the foot was divided into four masks, Mask 1 (M1) the area of the heel, Mask 2 (M2), the mid-foot, Mask 3 (M3), metatarsal region, and Mask 4 (M4) the region of the toes. The total area of the foot (TOT) included all four masks. Eighteen bilateral fractured calcanei have been omitted from the evaluation, owing to the lack of control foot, and 28 patients were excluded for the other complications of the fractures foot, complications of the control foot or complications extending to both feet. The data on the 171 fractures (68 patients treated conservatively and 103 patients treated operatively) of the calcaneus were compared with their control feet. The average age was 52.0 years (+/- 2.7) and the average follow up time was 49.9 months (+/- 17.5). The statistical analysis was performed using SPSS for Windows. Examination of correlation, repeated measurement analysis of variance, ANOVA, and multiple comparisons were performed by Bonferoni. Linear discriminating analysis was also performed. Significance level was defined as p<0.05 in each case. RESULTS:: All investigated parameters (area, max.F, max.P, absolute and relative contact time, FTI, PTI.) of M2 were significantly higher on the fractured side than on the intact one. The investigation of the whole foot showed significant increase concerning the area, and significant decrease in the max. force, FTI and PTI values. The differences between the conservatively treated and the intact foot values, as well as the differences between operatively treated foot and the intact one, demonstrated a significant decrease in the FTI TOT and the PTI TOT in both groups. A significantly higher difference was also demonstrated when the difference in the value of PTI TOT in the operative group was compared to the conservative one. Therefore, the values of the fractured side of the operative group were significantly lower than the values of the intact one, but significantly higher than the values of the conservative group. CONCLUSIONS:: The gait analysis parameters for the calcaneus fractured and the intact sides allowed for separation of the data according to significant differences. The results of the gait analysis comparing the conservative and operative method of the treatment showed that the surgical method was the better choice. PMID:11415721

Tóth, K; Boda, K; Kellermann, P; Zadravecz, G; Korcsmar, J

1997-04-01

3

Occipital Condyle Fracture With Isolated Unilateral Hypoglossal Nerve Palsy  

PubMed Central

Occipital condyle fractures (OCFs) with selective involvement of the hypoglossal canal are rare. OCFs usually occur after major trauma and combine multiple fractures. We describe a 38-year-old man who presented with neck pain and a tongue deviation to the right side after a traffic accident. Severe limitations were detected during active and passive range of neck motion in all directions. A physical examination revealed a normal gag reflex and normal mobility of the palate, larynx, and shoulder girdle. He had normal taste and general sensation in his tongue. However, he presented with a tongue deviation to the right side on protrusion. A videofluoroscopic swallowing study revealed piecemeal deglutition due to decreased tongue mobility but no aspiration of food. Plain X-ray film findings were negative, but a computed tomography study with coronal reconstruction demonstrated a right OCF involving the hypoglossal canal. An electrodiagnostic study revealed evidence of right hypoglossal nerve palsy. We report a rare case of isolated hypoglossal nerve palsy caused by an OCF. PMID:25379499

Yoon, Jin Won; Lim, Oh Kyung; Park, Ki Deok

2014-01-01

4

Occipital condyle fracture with isolated unilateral hypoglossal nerve palsy.  

PubMed

Occipital condyle fractures (OCFs) with selective involvement of the hypoglossal canal are rare. OCFs usually occur after major trauma and combine multiple fractures. We describe a 38-year-old man who presented with neck pain and a tongue deviation to the right side after a traffic accident. Severe limitations were detected during active and passive range of neck motion in all directions. A physical examination revealed a normal gag reflex and normal mobility of the palate, larynx, and shoulder girdle. He had normal taste and general sensation in his tongue. However, he presented with a tongue deviation to the right side on protrusion. A videofluoroscopic swallowing study revealed piecemeal deglutition due to decreased tongue mobility but no aspiration of food. Plain X-ray film findings were negative, but a computed tomography study with coronal reconstruction demonstrated a right OCF involving the hypoglossal canal. An electrodiagnostic study revealed evidence of right hypoglossal nerve palsy. We report a rare case of isolated hypoglossal nerve palsy caused by an OCF. PMID:25379499

Yoon, Jin Won; Lim, Oh Kyung; Park, Ki Deok; Lee, Ju Kang

2014-10-01

5

Unilateral versus bilateral balloon kyphoplasty in the treatment of osteoporotic vertebral compression fractures.  

PubMed

Bilateral and unilateral approaches are the main methods for balloon kyphoplasty. However, controversy exists about which leads to superior outcomes. The goal of this study was to compare the clinical effects and safety of unilateral vs bilateral balloon kyphoplasty for osteoporotic vertebral compression fractures. Five databases (PubMed, Cochrane Library, EMBASE, Web of Science, and Chinese Biomedical Database) were searched without language, publication, or date restrictions. Randomized controlled trials involving a total of 876 patients and comparing the efficacy of unilateral vs bilateral balloon kyphoplasty for osteoporotic vertebral compression fractures were identified. Meta-analysis revealed no significant differences in visual analog scale pain score up to 2-year follow-up (mean difference at 1 week, 0.17 [95% confidence interval (CI), -0.11 to 0.44]; mean difference at 1 year, 0.01 [95% CI, -0.29 to 0.32]; mean difference at 2 years, 0.28 [95% CI, -0.13 to 0.70]), Oswestry Disability Index pain score up to 1-year follow-up (mean difference at 1 week, 1.28 [95% CI, -2.62 to 5.17]; mean difference at 1 year, 1.87 (95% CI, -5.33 to 9.06]), anterior and middle vertebral height (mean difference anterior, -0.13 [95% CI, -0.32 to 0.06]; mean difference middle, -0.16 [95% CI, -0.36 to 0.03]), or kyphotic angle (mean difference, -0.02 [95% CI, -0.65 to 0.61]); however, the unilateral approach resulted in a shorter operative time (mean difference, -19.33 [95% CI, -4.42 to -14.24]), smaller amount of cement injected (mean difference, -2.07 [95% CI, -2.42 to -1.71]), and lower risk of cement leakage (mean difference, 0.47 [95% CI, 0.24-0.92]) than the bilateral approach. The unilateral approach resulted in pain relief and vertebral height and kyphotic angle restoration comparable with that of bilateral kyphoplasty. The unilateral approach should be considered an effective option for the treatment of osteoporotic vertebral compression fractures. PMID:25350627

Chen, Hua; Tang, Peifu; Zhao, Yanpeng; Gao, Yuan; Wang, Yan

2014-09-01

6

Development and validation of a new approach for computer-aided long bone fracture reduction using unilateral external fixator  

Microsoft Academic Search

An innovative computer-aided method to plan and execute long bone fracture reduction using Dynafix™ unilateral external fixator (EF) is presented and validated. A matrix equation, which represents a sequential transformation from proximal to distal ends, was derived and solved for the amount of rotation and translation required at each EF joint to correct for a displaced fracture using a non-linear

T. K. K. Koo; E. Y. S. Chao; A. F. T. Mak

2006-01-01

7

Cadaveric position of unilateral vocal cord: a case of cricoid fracture with ipsilateral arytenoid dislocation  

PubMed Central

We report a case of cricoid cartilage fracture with unilateral arytenoid dislocation following a motorcycle accident. This 25 year old male sustained blunt injury to the head, face and neck. He presented late to the hospital with one week history of dysphonia. Laryngoscopy revealed cadaveric position of the non-functioning left vocal cord. CT and MRI showed laterally displaced left vocal cord. Displaced fractures were noted in the cricoid at the junction of lamina with the anterior arch on the left side and at the right side of the anterior arch, along with dislocated left arytenoid resulting in ipsilateral vocal cord palsy. Medialization thyroplasty was performed to improve his phonation. Laryngeal trauma warrants close monitoring because of the risk of airway compromise. Radiologists play a crucial role in early diagnosis and should always have high index of suspicion. Recognition of laryngeal injury is important for initial resuscitation as well as for long term airway and vocal function. PMID:22690288

Gopalakrishnan, Nirmalkumar; Mariappan, Kalaichezhian; Indiran, Venkatraman; Maduraimuthu, Prabakaran; Varadarajan, Chandrasekhar

2012-01-01

8

Unilateral atlanto-axial fractures in near side impact collisions: An under recognized entity in cervical trauma  

PubMed Central

Objective: Nearside impact collisions presenting with lateral mass fractures of atlanto-axial vertebrae contralateral to the impact site represents a rare fracture pattern that does not correlate with previously described injury mechanism. We describe our clinical experience with such fractures and propose a novel description of biomechanical forces involved in this unique injury pattern. The findings serve to alert clinicians to potentially serious consequences of associated unrecognized and untreated vertebral artery injury. Material and Methods: In addition to describing our clinical experience with three of these fractures, a review of Crash Injury Research and Engineering Network (CIREN) database was conducted to further characterize such fractures. A descriptive analysis of three recent lateral mass fractures of the atlanto-axial segment is coupled with a review of the CIREN database. A total of 4047 collisions were screened for unilateral fractures of atlas or axis. Information was screened for side of impact and data regarding impact velocity, occupant injuries and use of restraints. Results: Following screening of unilateral fractures of atlas and axis for direct side impacts, 41 fractures were identified. Cross referencing these cases for occurrence contralateral to side of impact identified four such fractures. Including our recent clinical experience, seven injuries were identified: Five C1 and two C2 fractures. Velocity ranged from 14 to 43 km/h. Two associated vertebral artery injuries were identified. Conclusions: Complexity of the atlanto-axial complex is responsible for a sequence of events that define load application in side impacts. This study demonstrates the vulnerability of vertebral artery to injury under unique translational forces and supports the use or routine screening for vascular injury. Diminished sensitivity of plain radiography in identifying these injuries suggests that computerized tomography should be used in all patients wherein a similar pattern of injury is suspected. PMID:25013345

Lozen, Andrew M.; Pace, Jonathan; Yoganandan, Narayan; Pintar, Frank A.; Cusick, Joseph F.

2014-01-01

9

Evaluation of soft tissue asymmetry using cone-beam computed tomography after open reduction and internal fixation of zygomaticomaxillary complex fracture  

PubMed Central

Objectives In this study, we assessed soft tissue asymmetry that occurred after open reduction of unilateral zygomaticomaxillary complex (ZMC) fractures. We proposed a simple method to assess soft tissue asymmetry after reduction surgery by evaluating the symmetry between the affected and the unaffected sides. The factors affecting soft tissue contour after surgery were also analyzed. Materials and Methods Subjects included patients admitted to Wonkwang University Dental Hospital from 2008 to 2013. Cone-beam computed tomography (CBCT) images of asymmetric patients who underwent open reduction at least 3 months prior were compared with healthy patients. Results The degree of asymmetry was measured in both the open reduction and control groups. Landmarks that showed a statistically significant difference between the two groups were zygion (1.73±0.24 mm), bucclae (1.08±0.26 mm), point of cheek (2.05±0.33 mm) and frontozygomatic point (1.30±0.31 mm). Conclusion When compared with the normal group, asymmetry can occur in the affected side, which usually shows depression of overlying soft tissue and is statistically significantly different. Evaluation of soft tissue asymmetry with CBCT images after open reduction of ZMC fracture is useful. PMID:25045636

Kim, Dong Hyuck; Kim, Rae Hyong; Lee, Jun; Chee, Young Deok

2014-01-01

10

Unusual Unilateral Fracture of the Condylar and Coronoid Processes of the Mandible  

PubMed Central

The incidence of condylar fracture is very high and most are not caused by direct trauma. On the other hand, fracture of the coronoid process is reported less often than fracture of other parts of the mandible. We report a case of right subcondylar and coronoid fractures without any evidence of direct trauma to the zygomatic area or an indirect trauma to the mandibular corpus or sypmheseal region. The possible cause was identified as acute reflex contraction of the temporalis muscles leading to coronoid and condylar stress fractures. PMID:25379353

Baykul, Timucin; Ayd?n, M As?m; Aksoy, Muge C?na; F?nd?k, Yavuz

2014-01-01

11

Monte Carlo Modeling of Diffuse Scattering from Single Crystals: The Program ZMC  

SciTech Connect

Diffuse scattering probes the local ordering in a crystal, whereas Bragg peaks are descriptive of the average long-range ordering. The population of local configurations can be explored by modeling the three-dimensional distribution of diffuse scattering. Local configurations are not constrained by the average crystallographic symmetry, so one way of modeling diffuse scattering is by modeling a disordered (short-range-ordered) structure and then calculating its diffuse scattering. The structure must contain enough unit cells to give a statistically valid model of the populations of local configurations, and so requirements for a program to model this ordering are very different from programs that model average crystal structures (used to fit the Bragg diffraction). ZMC is a program that has been developed to model diffuse scattering, particularly from molecular crystals. The strategies used to tackle the problem and the way in which they are implemented will be discussed.

Goossens, D.J.; Heerdegen, A.P.; Chan, E.J.; Welberry, T.R. (ANU)

2012-04-30

12

Comparison of outcome of unilateral locking plate and dual plating in the treatment of bicondylar tibial plateau fractures  

PubMed Central

Background Tibial plateau fracture (TPF) includes different fracture patterns with varied degrees of articular depression and displacement. Many kinds of fixators, including newly designed plate with locking screws, were applied to treat these complicated fractures. We intended to follow up the surgical outcomes of (1) unilateral locking plate, (2) classic dual plates, or (3) hybrid dual plates for TPF. Materials and methods We retrospectively reviewed 76 patients with TPF, Schatzker types V and VI, who we operated from June 2006 to May 2009 in our institute. Excluding patients who expired due to other medical conditions and without complete follow-up, 45 patients were sorted out in this series. The scheme of surgical intervention was designed by visiting staff, and 15 patients, as group I, were treated with unilateral locking plate. The other 19 patients, as group II, were treated with classic dual plates. The residual 11 patients, as group III, were treated with hybrid dual plates (one lateral approach locking compression plate (LCP)?+?medial anti-gliding plate). All patients were under periodic F/U at about 6 weeks interval for at least 18 months postoperatively. Results In group I, 13 cases achieved solid bony union without obvious traumatic OA change, limitation of ROM, or malalignment. In groups II and III, 15 and 10 patients reached the same goal, respectively. By analysis of the recorded parameters with statistical software (SPSS 12.0), there were five parameters with significant difference, including Schatzker classification, operation time, staged treatment or not, hospitalization period, and hardware impingement. Conclusions There was no significant statistical difference of union rate between these three groups in our series. Based on our clinical follow-up, several key points were emphasized: (1) Soft tissue problems should be kept in mind, and usage of locking plate can reduce the discomfort of hardware impingement effectively. (2) The single lateral approach technique for TPF with locking plate results in less operation time and shorter hospitalization period. (3) If the medial buttress cannot be established by reduction of the lateral fracture, then open reduction of the medial side is necessary and buttresses the medial fragment by dual plates. PMID:25038620

2014-01-01

13

Unilateral blepharochalasis  

Microsoft Academic Search

Unilateral blepharochalasis is an extremely rare disorder with an unknown etiology and pathogenesis. The authors present a 22-year old patient in whom a right-sided skin overhang of the upper eyelid caused visual field impairment. The condition was corrected by a standard blepharoplasty. The histological examination suggested a localised anomaly of the lymphatic system and an almost complete absence of elastic

Georg M. Huemer; Thomas Schoeller; Gottfried Wechselberger; Bernhard Zelger; Karin M. Dunst; Hildegunde Piza-Katzer

2003-01-01

14

Fractures  

MedlinePLUS

A fracture is a break, usually in a bone. If the broken bone punctures the skin, it is called an open ... falls or sports injuries. Other causes are low bone density and osteoporosis, which cause weakening of the ...

15

Sliding performance of unilateral external fixators for tibia  

Microsoft Academic Search

Some unilateral external fixators have a sliding mechanism to achieve dynamic axial fixation. However, it has been reported that binding of this mechanism occurs during routine ambulation. The Hifixator, a unilateral external fixator, has been developed which has a new type of sliding mechanism. The mechanism of the Hifixator was tested by connecting it to a fractured bone model with

Takashi Matsushita; Kozo Nakamura; Isao Ohnishi; Takahide Kurokawa

1998-01-01

16

Traumatic unilateral vasomotor rhinitis.  

PubMed

Vasomotor rhinitis (VMR) is a commonly encountered entity that may be difficult to diagnose. The classic symptoms are clear rhinorrhea and nasal congestion, commonly brought on by exercise, stress, heat, cold, and environmental irritants. The diagnosis is one of exclusion, and management usually involves avoidance of inciting agents and treatment with an anticholinergic nasal spray. We describe a case of VMR in a 22-year-old woman who presented with symptoms of clear, left-sided rhinorrhea and epiphora that had begun shortly after a motor vehicle accident approximately 1.5 years earlier, but which she had not reported at that time. The patient's left carotid canal had been fractured and the surrounding sympathetic plexus injured in the accident, resulting in an overactive parasympathetic system. Both exercise and heat exacerbated her symptoms. Allergy was excluded by negative allergy testing, and the patient did not respond to fluticasone nasal spray. Given the mechanism of injury, the unilaterality of symptoms, and the patient's lack of response to nasal steroids, it was thought that the VMR was due to the earlier traumatic injury, which had resulted in imbalance of the autonomic neural input. A trial of ipratropium was given to directly treat the parasympathetic overactivity. This treatment resulted in immediate improvement in both the nasal and lacrimal secretions. PMID:23288805

Harlor, Evan J; Greene, J Scott; Considine, Catherine

2012-11-01

17

[Unilateral borderline ovarian tumor and unilateral adenexectomy?].  

PubMed

To perform an adnexectomy in case of unilateral borderline tumor must consider the risk of recurrence, the preservation of fertility, and to integrate a global comprehensive management of a couple. Adnexectomy can be considering as a legitimate option when the woman desire a pregnancy. The risk of recurrence is low and the global survey high. Identification of woman with a high risk of recurrence is necessary. Adnexectomy can be considering as a legitimate option to preserve fertility in case of unilateral tumor. However, ovarian reserve data are missing after the surgery. Adnexectomy can be considering for the management of infertile woman with unilateral borderline tumor. IVF can be performed in the absence of any poor prognosis factor. Management with ovarian cryopreservation and In vitro Maturation remain unclear. PMID:25164163

Boujenah, J; Bricou, A; Moreaux, G; Grynberg, M; Sifer, C; Hugues, J N; Poncelet, C

2014-09-01

18

Complications of unilateral weight bearing.  

PubMed

The most common and significant complication of excessive unilateral weight bearing in adult horses is support limb laminitis. Young horses with unilateral lameness problems develop support limb laminitis infrequently compared with adult horses. PMID:19203705

Baxter, Gary M; Morrison, Scott

2008-12-01

19

Bicondylar Hoffa Fracture Successfully Treated with Headless Compression Screws  

PubMed Central

Bicondylar coronal plane fracture, eponymically named Hoffa fractures, is an extremely rare injury. We present a case of isolated unilateral bicondylar Hoffa fracture that was successfully treated with open reduction and internal fixation using headless compression screws with satisfactory results. We inserted posteroanteriorly oriented Acutrak screws perpendicular to the fracture plane via lateral parapatellar arthrotomy, which provided excellent compression across the fracture. PMID:25140263

Kuroda, Ryosuke; Kurosaka, Masahiro

2014-01-01

20

Craniocervical junction trauma with occipital condyle fracture; case report  

Microsoft Academic Search

Authors present the case of a unilateral occipital condyle fracture diagnosed with computed tomography (CT) in a motor vehicle\\u000a accident victim. Patient had unilateral occipital condyle fracture with inferomedially displaced bone fragment, a type 3 fracture\\u000a according to the Anderson and Montesano classification of occipital condyle fractures, bilaterally widened occipitoatlantal\\u000a joint space, and head mowed forward in relation to the

Ivan Žokalj; Hussein Saghir; Jasminka Igrec; Zlatko Pav?ec

2010-01-01

21

Transient ipsilateral mydriasis during correction of left blowout fracture.  

PubMed

Mydriasis, either bilateral or unilateral, seldom occurs during reconstruction of periorbital fracture. Anisocoria, a unilateral mydriasis, requires more urgent assessment than bilateral mydriasis does. Pharmacologic agents, local anesthetic infiltration, as well as direct or indirect oculomotor nerve damage are possible causes of unilateral mydriasis. Few cases have been reported about intraoperative temporary ipsilateral mydriasis during correction of blowout fracture. We have experienced an unusual case of anisocoria and report the case with literature reviews. PMID:24561370

Lee, Ju-Min; Kim, Cheul-Hong; Kim, Uk-Kyu; Chung, In-Kyo

2014-03-01

22

Stability with unilateral external fixation in the tibia  

Microsoft Academic Search

\\u000a Abstract\\u000a   Unilateral external fixation can be used in the provisional or definitive treatment of tibial fractures. A properly applied\\u000a fixator allows bony and soft tissue stability, whereas an improperly applied fixator achieves neither and can be a hindrance.\\u000a The principles for the successful application of monolateral external fixation, including the rationale for choosing this\\u000a type of device, the assembly of

N. Giotakis; B. Narayan

2007-01-01

23

Primary unilateral tuberculous inguinal lymphadenitis  

Microsoft Academic Search

We report the case of a young Greek woman who presented with erythema nodosum and isolated unilateral inguinal lymphadenopathy. Excision and biopsy of the lymph node showed infection due to M. tuberculosis. An extensive workup did not reveal any other foci of tuberculosis. Isolated tuberculous inguinal lymphadenitis is a rare entity in developed countries and is almost always bilateral. Our

Dionisios Loukeris; Alexandra Zormpala; Konstantinos Chatzikonstantinou; Athena Androulaki; Nikolaos V. Sipsas

2005-01-01

24

Skull fracture  

MedlinePLUS

Basilar skull fracture; Depressed skull fracture; Linear skull fracture ... Skull fractures may occur with head injuries . The skull provides good protection for the brain. However, a severe impact ...

25

Nose fracture  

MedlinePLUS

Fracture of the nose; Broken nose; Nasal fracture ... A fractured nose is the most common fracture of the face. It usually occurs after an injury and often occurs with other fractures of the face. Sometimes a blunt injury can ...

26

Comparison of ultrasonography with computed tomography in the diagnosis of nasal bone fractures  

PubMed Central

Objectives The aim of this study is to compare ultrasonography with CT in the diagnosis of nasal bone fractures. Methods 40 patients (9 female and 31 male) with mid-facial fractures, which were suspected nasal bone fractures, were included. All of the patients had mid-facial CT images. Ultrasonography with a 7.5 MHz transducer (Aloka 3500, Tokyo, Japan) was used to evaluate the nasal bone fractures. All of the sonograms were compared with CT findings for sensitivity, specificity and predictive values. A ?2 test was applied to the data to assess statistical significance. Results CT diagnosed nasal bone fractures in 24 of the 40 patients (9 unilateral fractures and 15 bilateral fractures) while ultrasonography diagnosed the fractured bones in 23 patients (9 unilateral fractures and 14 bilateral fractures). Ultrasonography missed one fractured bone in a bilateral fractured case and a unilateral fracture was also missed (two false-negative results). The sensitivity and specificity of ultrasonography in assessing nasal bone fracture in comparison with CT were 94.9% and 100%, respectively. The positive predictive value (PPV) and the negative predictive value (NPV) of ultrasonographic evaluation of the nasal bone fractures were 100% and 95.3%, respectively. The ?2 test did not show any significant difference between CT and ultrasonography in diagnosis of nasal bone fractures (P = 0.819). Conclusion Ultrasonography can be used as a first line of diagnostic imaging for evaluating nasal bone fractures, especially in children and pregnant women. PMID:22065797

Javadrashid, R; Khatoonabad, M; Shams, N; Esmaeili, F; Jabbari Khamnei, H

2011-01-01

27

Congenital unilateral hydrocephalus--CT findings.  

PubMed

Congenital unilateral hydrocephalus is extremely uncommon with 18 cases previously reported in the English literature. Two additional newborns with unilateral hydrocephalus are presented. The second baby also presented a mega cisterna magna. This unusual association between Dandy-Walker variant and unilateral hydrocephalus has not been previously reported. Following ventriculo-peritoneal shunt, the babies had a normal cognitive neurodevelopment. The role of cranial computed tomography (CT) in diagnosis and follow-up is emphasized. PMID:11091018

Schulman, H; Landau, D; Schulman, P; Hertzanu, Y

2000-12-01

28

Unilateral hyperhydrosis in Pourfour du Petit syndrome  

Microsoft Academic Search

Upper limp hyperhydrosis is an idiopathic disease with bilateral involvement. However, Pourfour du Petit syndrome, the opposite of Horner syndrome, may result in unilateral upper limb hyperhydrosis. It occurs following hyperactivity of the sympathetic cervical chain as a consequence of irritation secondary to trauma. We report herein two cases with Pourfour du Petit syndrome showing unilateral upper limb hyperhydrosis. The

Murat Kara; Erkan Dikmen; Cengiz Akarsu; Ahu Birol

2004-01-01

29

Rotated subcondylar process fracture in the growing animal: An experimental study in rats  

Microsoft Academic Search

Abstract.Unilateral, rotated subcondylar fractures were surgically induced in young rats under general anaesthesia. A decrease in body weight was observed in the fractured animals, with recovery at the end of the experimental period. A tendency of deviation of the mandible to the fracture side was noticed on axial radiographs, but without significant difference between experimental and sham-operated animals. Histological data

João G. C. Luz; Vera C. de Araújo

2001-01-01

30

Biomechanical Study on osteotomized tibias fixed with unilateral adjustable external fixator  

Microsoft Academic Search

Summary  Five fresh tibias removed from 30–40 years old dead males were osteotomized at one-third supra-medium segment and then fixed\\u000a by an unilateral adjustable external fixator (UAEF) to be used as a model of external fixation of tibial fracture. For each\\u000a loading test under different configurations of UAEF, the ratio of the force-displacement was used to determine its stiffness\\u000a value. The

Liu Guo-ping; Du Jing-yuan; Wang Hong; Chen Ru-qing; Xu Zhao-xiong

1995-01-01

31

Extra Corporeal Fixation of Fractured Mandibular Condyle  

PubMed Central

Condylar fracture is the second most common site in the mandibular fractures. Motor vehicle accident and fall are the major causes of such fractures. Because of the anatomical weakness of the condyle and the shape of the condylar head the antero-medial dislocation of the condyle is common. Open reduction and closed reduction is always debatable. The open reduction will bring back the normal function much earlier than closed reduction. Medially dislocated condylar fracture fragments are always managed with open method. In superior or high condylar fractures,exact reduction with conventional open reduction can be difficult due to the limited surgical and visual fields. In such cases extracorporeal fixation of condyle using vertical ramus osteotomy may be better choice to achieve perfect alignment and absolute maintaince of vertical height of the ramus and facial symmetry. We here present a case of extracorporeal fixation of unilateral left high condylar fracture. PMID:25386546

Shenoy K, Vandana; Kengagsubbiah, Srivatsa; V, Sathyabhama; Priya, Vishnu

2014-01-01

32

Hemispatial sunglasses: Effect on unilateral spatial neglect  

Microsoft Academic Search

Objective: To investigate whether using glasses shaded on the non-neglected side would lead to less unilateral neglect during pencil-and-paper activities.Design: Descriptive study of ten patients. One remarkable case is described in detail.Setting: Rehabilitation medicine department in an urban general hospital.Patients: Ten hemiplegic patients showing left unilateral neglect during pencil-and-paper activities.Intervention: Use of glasses in which the right half of each

Takashi Arai; Hiroshi Ohi; Hisato Sasaki; Hiroo Nobuto; Koh Tanaka

1997-01-01

33

Hydraulic fracturing  

E-print Network

Hydraulic fracturing (also hydrofracturing, hydrofracking, fracking, or fraccing) is a well-stimulation technique in which rock is fractured by a hydraulically pressurized liquid. Some hydraulic fractures form naturally—certain veins or dikes are examp...

34

External fixation as a primary and definitive treatment for tibial diaphyseal fractures  

Microsoft Academic Search

The aim of this study was to evaluate the effectiveness of unilateral external fixator as primary and definitive treatment\\u000a for open tibial fractures, fractures with severe soft tissues injuries, threatened compartment syndrome, and in multiply injured\\u000a patients. Two hundred and twenty-three tibial shaft fractures (212 patients) were treated. In open fractures, union was achieved\\u000a in 25 weeks, while in closed in

Michail Beltsios; Olga Savvidou; John Kovanis; Panagiotis Alexandropoulos; Panagiotis Papagelopoulos

2009-01-01

35

Hand Fractures  

MedlinePLUS

... results can I expect from surgery for hand fractures? Perfect alignment of the bone on x-ray is not always necessary to ... Smoking has been shown to slow fracture healing. Fractures in children occasionally affect future growth of that bone (see the brochure/web page on Fractures in ...

36

Unilateral hyperhydrosis in Pourfour du Petit syndrome.  

PubMed

Upper limp hyperhydrosis is an idiopathic disease with bilateral involvement. However, Pourfour du Petit syndrome, the opposite of Horner syndrome, may result in unilateral upper limb hyperhydrosis. It occurs following hyperactivity of the sympathetic cervical chain as a consequence of irritation secondary to trauma. We report herein two cases with Pourfour du Petit syndrome showing unilateral upper limb hyperhydrosis. The patients presented with right-sided mydriasis and ipsilateral hemifacial hyperhydrosis. The onset of disease was followed by a trauma in both patients. They underwent upper thoracic sympathectomy with favorable outcome. A history of an antecedent trauma in patients with unilateral upper limb hyperhydrosis and anisocoria may imply a possible diagnosis of Pourfour du Petit syndrome. PMID:15296919

Kara, Murat; Dikmen, Erkan; Akarsu, Cengiz; Birol, Ahu

2004-08-01

37

Unilateral Isolated Proximal Femoral Focal Deficiency  

PubMed Central

Objective. To discuss a patient with a prenatal diagnosis of unilateral isolated femoral focal deficiency. Case. Antenatal diagnosis of unilateral isolated femoral focal deficiency was made at 20 weeks of gestation. The length of left femur was shorter than the right, and fetal femur length was below the fifth percentile. Proximal femoral focal deficiency was diagnosed. After delivery, the diagnosis was confirmed with skeletal radiographs and magnetic resonance imaging. In prenatal ultrasonographic examination, the early recognition and exclusion of skeletal dysplasias is important; moreover, treatment plans should be initiated, and valuable information should be provided to the family. PMID:23984135

Do?er, Emek; Köpük, ?ule Y.; Çak?ro?lu, Yi?it; Çak?r, Özgür; Yücesoy, Gülseren

2013-01-01

38

Assessment of internal orbital reconstructions for pure blowout fractures: Cranial bone grafts versus titanium mesh  

Microsoft Academic Search

Purpose: To assess the adequacy of internal orbital reconstruction in pure blowout fractures using either cranial bone grafts or titanium mesh implants. Patients and Methods: The preoperative and postoperative true coronal computed tomography (CT) scans of 58 patients with unilateral pure orbital blowout fractures were included in the study. Demographic data and measurements of the pretreatment size of the defects

Edward Ellis; Yinghui Tan

2003-01-01

39

Technique of external fixation ofgrossly unstable or open tibial shaft fractures in children  

Microsoft Academic Search

External fixation is the fixation technique of choice for severe open fractures of the tibia in children. Inaddition, many unstable closed fractures of the tibia are best treated with external fixation. Unilateral half-pin frames provide excellent stability and are relatively easy to apply.The use of fluoroscopy during pin placement and diligent wound and pin care after surgery minimize complications.

Steven L. Buckley

1995-01-01

40

Unilateral Vestibular Loss Impairs External Space Representation  

PubMed Central

The vestibular system is responsible for a wide range of postural and oculomotor functions and maintains an internal, updated representation of the position and movement of the head in space. In this study, we assessed whether unilateral vestibular loss affects external space representation. Patients with Menière's disease and healthy participants were instructed to point to memorized targets in near (peripersonal) and far (extrapersonal) spaces in the absence or presence of a visual background. These individuals were also required to estimate their body pointing direction. Menière's disease patients were tested before unilateral vestibular neurotomy and during the recovery period (one week and one month after the operation), and healthy participants were tested at similar times. Unilateral vestibular loss impaired the representation of both the external space and the body pointing direction: in the dark, the configuration of perceived targets was shifted toward the lesioned side and compressed toward the contralesioned hemifield, with higher pointing error in the near space. Performance varied according to the time elapsed after neurotomy: deficits were stronger during the early stages, while gradual compensation occurred subsequently. These findings provide the first demonstration of the critical role of vestibular signals in the representation of external space and of body pointing direction in the early stages after unilateral vestibular loss. PMID:24523916

Borel, Liliane; Redon-Zouiteni, Christine; Cauvin, Pierre; Dumitrescu, Michel; Deveze, Arnaud; Magnan, Jacques; Peruch, Patrick

2014-01-01

41

Shoulder Fractures  

MedlinePLUS

... Z Hand Anatomy Find a Hand Surgeon Shoulder Fractures Email to a friend * required fields From * To * ... of the shoulder. CAUSES Figure 1: Shoulder anatomy Fracture type about the shoulder varies by age. The ...

42

Facial fractures.  

PubMed Central

Emergency room physicians frequently see facial fractures that can have serious consequences for patients if mismanaged. This article reviews the signs, symptoms, imaging techniques, and general modes of treatment of common facial fractures. It focuses on fractures of the mandible, zygomaticomaxillary region, orbital floor, and nose. Images p520-a p522-a PMID:8199509

Carr, M. M.; Freiberg, A.; Martin, R. D.

1994-01-01

43

Unilateral paralysis associated with profound hypokalemia.  

PubMed

Unilateral paralysis is rarely reported to be primary presentation of severe hypokalemia. We describe a 24-year-old woman who presented to the emergency department with sudden onset of right-sided weakness. Neurologic examination revealed diminished muscle strength and tendon reflexes over the right limbs. Computed tomography of the brain showed no organic brain lesion. However, laboratory data showed hypokalemia (K+ 2.0 mmol/L) with metabolic acidosis (HCO3 ? 19 mmol/L). She needed a total of 260 mmol K+ to achieve complete recovery of muscle strength at a serum K+ level of 3.2 mmol/L and was proved to have distal renal tubular acidosis. Severe hypokalemia must be kept in mind as a cause of acute unilateral paralysis without organic lesions to avoid unnecessary examination and potentially life-threatening complications. PMID:22463964

Chiang, Wen-Fang; Yeh, Fu-Chiang; Lin, Shih-Hua

2012-11-01

44

Stress fractures.  

PubMed

Stress fractures are common over-use injuries which include fatigue and insufficiency fractures. Athletes, soldiers and osteoporotic patients are some of the individuals at high risk for the development of this injury. Owing to the low sensitivity of plain radiography at the onset of symptoms the diagnosis of this entity may be easily overlooked. Occasionally, some of these fractures, such as tibial fracture in children and fractures in the clavicle and pelvic ring, can be misdiagnosed as tumoral or infectious processes; moreover, although most stress fractures are uncomplicated and can be managed by rest and restriction from precipitating activity, a subset of these fractures can present a high risk for progression to complete fracture or non-union problems. All of this indicates that the various types of stress fracture, owing to their different clinical characteristics and evolution, should be commented on in detail. In this chapter different types of stress fracture are described with special reference to their localization, clinical characteristics, evolution and treatment. PMID:15123050

Peris, Pilar

2003-12-01

45

Unilateral coronal craniosynostosis and Down syndrome.  

PubMed

There is no known correlation between Down syndrome and craniosynostosis. The authors report 2 infants with trisomy 21 and right unilateral coronal craniosynostosis. Both patients were clinically asymptomatic but displayed characteristic craniofacial features associated with each disorder. One patient underwent a bilateral fronto-orbital advancement and the other underwent an endoscopically assisted strip craniectomy with postoperative helmet therapy. Both patients demonstrated good cosmesis at follow-up. PMID:24635134

Siu, Alan; Rogers, Gary F; Myseros, John S; Khalsa, Siri S; Keating, Robert F; Magge, Suresh N

2014-05-01

46

Local recurrence of a unilateral cystic nephroma.  

PubMed

Cystic nephroma is an uncommon, benign renal lesion. We report the first case of local recurrence of a unilateral cystic nephroma in an adult. Only three cases of recurrence in bilateral cystic nephroma have been described in the literature before. Other renal lesions may not be differentiated preoperatively from cystic nephroma and thus require surgical exploration. Long-term follow-up is recommended to rule out local recurrence. PMID:15147551

Bastian, Patrick J; Kuhlmann, Richard; Vogel, Jürgen; Bastian, Hans-Peter

2004-05-01

47

Functioning unilateral adrenocortical carcinoma in a dog.  

PubMed

An 11-year-old, 24-kg, intact female Siberian husky dog in anestrus had a 2-month history of polyuria and polydipsia. The dog had signs of mineralocorticoid excess such as hypertension and hypokalemia refractory to potassium supplementation. Abdominal ultrasound revealed an irregular mass in the left adrenal gland. The ACTH stimulation test for aldosterone concentration did not reveal hyperaldosteronism. Unilateral adrenalectomy was performed and histopathology identified adrenal cortical carcinoma. All clinical signs of mineralocorticoid excess ceased after surgery. PMID:23204580

Gójska-Zygner, Olga; Lechowski, Roman; Zygner, Wojciech

2012-06-01

48

Unilateral duplex horseshoe kidney with ectopic ureterocele  

SciTech Connect

Horseshoe kidney results from mesial fusion of the two nephrogenic blastemas during the fourth to seventh weeks of gestation. Associated genitourinary anomalies occur in approximately 25% of patients with horseshoe kidney. The authors report a case of a horseshoe kidney with unilateral pelvis and ureteral duplication with an ectopic ureterocele obstructing its upper moiety diagnosed by intravenous urography and real-time sonography. 13 references, 2 figures.

Sumner, T.E.; Volberg, F.M.; Munitz, A.; Harrison, L.H.; Mashburn, A.M.

1985-02-01

49

Unilateral headache with bilateral internal ophthalmoplegia.  

PubMed

We describe the case of a young woman suffering from migraine. After some years, the headache started to be accompanied by internal ophthalmoplegia. Mydriasis was unilateral and after a few months became bilateral. The ophthalmoplegic migraine is a rare type of headache and it is characterized by paresis of one or more of the third, fourth or sixth cranial nerves. Migraine attacks associated with mydriasis (internal ophthalmoplegia) are extremely rare. Triptan therapy resolved mydriasis, but not the headache. PMID:22183266

Simonetto, Marco; Zanet, Luca; Capozzoli, Francesca; Gelli, Andrea; Masè, Giovanni

2012-10-01

50

Hip fracture - discharge  

MedlinePLUS

Inter-trochanteric fracture repair - discharge; Subtrochanteric fracture repair - discharge; Femoral neck fracture repair - discharge; Trochanteric fracture repair - discharge; Hip pinning surgery - ...

51

Convergence of Unilateral Laplace Transforms on Time Scales  

Microsoft Academic Search

A time scale is any closed subset of the real line. Continuous time and discrete time are special cases. The unilateral Laplace\\u000a transform of a signal on a time scale subsumes the continuous-time unilateral Laplace transform, and the discrete-time unilateral\\u000a z-transform as special cases. The regions of convergence (ROCs) time scale Laplace transforms are determined by the time scale’s\\u000a graininess.

John M. Davis; Ian A. Gravagne; Robert J. Marks

2010-01-01

52

Unilateral straight hair and congenital horner syndrome.  

PubMed

Congenital Horner syndrome is a rare disorder that accounts for less than 5% of all cases of Horner syndrome. Like Horner syndrome in general, it consists primarily of ptosis, miosis, and anhidrosis. Congenital Horner syndrome may manifest some special features such as iris heterochromia since the sympathetic nervous system is an essential component for the development and maintenance of eye color. We present 3 cases of unilateral straight hair in association with congenital Horner syndrome in which the patients had straight hair ipsilateral to the Horner syndrome, whereas on the contralateral side, it was curly, and we discuss possible mechanisms for this phenomenon. PMID:22622362

Wang, Frederick M; Wertenbaker, Christian; Cho, Hyung; Marmor, Maury A; Ahn-Lee, Sandra S; Bernard, Bruno A

2012-06-01

53

Unilateral nevoid telangiectasia associated with ipsilateral melorheostosis.  

PubMed

Melorheostosis is a rare disorder characterized by irregular, flowing hyperostosis in long bones, commonly described on radiographs as wax flowing down a candle. In addition to bony sclerosis, cutaneous manifestations overlying the involved bones have been reported including linear scleroderma, neurofibromatosis, and vascular and lymphatic malformations. Unilateral nevoid telangiectasia (UNT) is a rare primarily cutaneous condition characterized by linearly arranged small dilated blood vessels in dermatomal or Blaschkoid patterns on the skin. Here, we present the case of a nine-year-old Korean male with UNT associated with ipsilateral melorheostosis. PMID:22577274

Kim, Jihyun; Cho, Sung Bin; Cho, Suhyun; Bang, Dongsik

2012-05-01

54

Unilateral Molar Distalization: A Nonextraction Therapy  

PubMed Central

In the recent years, nonextraction treatment approaches and noncompliance therapies have become more popular in the correction of space discrepancies. One of the conventional approaches for space gaining in the arches without patient compliance is done by using certain extra oral appliances or intraoral appliance. The greatest advantage of certain appliances like fixed functional and molar distalization appliances is that they minimize the dependence on patient cooperation. Molar distalization appliances like pendulum appliance which distalizes the molar rapidly without the need of head gear can be used in patients as a unilateral space gaining procedure due to buccal segment crowding. PMID:23320203

Prasad, M. Bhanu; Sreevalli, S.

2012-01-01

55

Adult-onset unilateral disabling pansclerotic morphea.  

PubMed

Disabling pansclerotic morphea (DPM) is a rare, severe, and mutilating form of morphea, involving the dermis, subcutaneous tissue, fat, muscle, and even bone. It is usually seen before the age of 14 years, with the patient complaining of arthralgia and stiffness at the time of onset. We report a case of unilateral adult-onset DPM with sparing of the face. Within a few months of onset, painful contracture deformities of the hand, elbow, and shoulder joints developed, impairing the patient's normal daily activities. We are reporting this case because of the unusual presentation: DPM in an adult, with history of trauma in childhood and rapid onset of complications, is rare. PMID:24891683

Singh, Adarshlata; Singhal, Kritika; Choudhary, Sanjiv; Bisati, Shazia; Arora, Mallika

2014-05-01

56

Hand fracture - aftercare  

MedlinePLUS

Boxer’s fracture; Metacarpal fracture ... are called the metacarpal bones. You have a fracture (break) in one or more of these bones. This is called a hand (or metacarpal) fracture. Some hand fractures require wearing a splint or ...

57

Efficacy analysis of pedicle screw internal fixation of fractured vertebrae in the treatment of thoracolumbar fractures  

PubMed Central

The present study aimed to discuss the method and effect of posterior internal fixation of thoracolumbar fractures strengthened by the vertical stress pedicle screw fixation of fractured vertebrae. Patients with single thoracolumbar fractures were examined retrospectively. Fourteen patients (group A) had been treated with vertical stress pedicle screw fixation of a fractured vertebra and sixteen patients (group B) received traditional double-plate fixation, as a control. All patients were diagnosed with fresh fractures with a complete unilateral or bilateral pedicle and no explosion of the inferior half of the vertebral body or inferior endplate. In group A, patients received conventional posterior distraction and lumbar lordosis restoration, as well as pedicle screws in the fractured vertebra in a vertical direction to relieve stress to achieve a local stress balance. All patients were followed up postoperatively for 4–18 months (average, 12.6 months). The vertical stress pedicle screw fixation assisted in the reduction of vertebrae fracture, which reduced the postoperative Cobb’s angle loss. There was a significant difference in the change of Cobb’s angle between the two groups one year after surgery (P<0.01). Conditional application of pedicle screws in a single thoracolumbar fracture enhances the stability of the internal fixation system and is conducive to the correction of kyphosis and maintenance of the corrective effects. PMID:23407593

HUANG, WEIJIE; LUO, TAO

2013-01-01

58

Elbow Fractures  

MedlinePLUS

... include exercises, scar massage, modalities such as ultrasound, heat, ice, etc., and splints that stretch the joint (static progressive or dynamic splints). Specific types of elbow fractures: Radial head and neck ...

59

Fracture Management  

MedlinePLUS

... to hold the fracture in the correct position. • Fiberglass casting is lighter and stronger and the exterior ... with your physician if this occurs. • When a fiberglass cast is used in conjunction with a GORE- ...

60

Temporal Bone Fracture Causing Superior Semicircular Canal Dehiscence  

PubMed Central

Importance. Superior semicircular canal dehiscence (SCD) is a third window lesion of the inner ear causing symptoms of vertigo, autophony, tinnitus, and hearing loss. A “two-hit” hypothesis has traditionally been proposed, whereby thinly developed bone overlying the superior canal is disrupted by a sudden change in intracranial pressure. Although the symptoms of SCD may be precipitated by head injury, no previous reports have described a temporal bone fracture directly causing SCD. Observations. Two patients sustained temporal bone fractures after closed head trauma, and developed unilateral otologic symptoms consistent with SCD. In each instance, computed tomography imaging revealed fractures extending through the bony roof of the superior semicircular canal. Conclusions and Relevance. Temporal bone fractures, which are largely treated nonoperatively, have not previously been reported to cause SCD. As it is a potentially treatable entity, SCD resulting from temporal bone fracture must be recognized as a possibility and diagnosed promptly if present. PMID:25295207

Peng, Kevin A.; Yang, Isaac; Gopen, Quinton

2014-01-01

61

Sustained attention training for unilateral neglect: Theoretical and rehabilitation implications  

Microsoft Academic Search

Many studies have shown a co-variation of unilateral neglect with nonlateralised attentional functions. Recently, Posner has argued that there are two separate neural systems that influence the posterior attentional system which is presumed to be impaired in unilateral neglect, namely, the posterior system itself (located partly in the inferior parietal lobules) as well as a secondary modulatory sustained attention or

Ian H. Robertson; Richard Tegnér; Kerstin Tham; Ada Lo; Ian Nimmo-smith

1995-01-01

62

Reproducibility of Tactile Assessments for Children with Unilateral Cerebral Palsy  

ERIC Educational Resources Information Center

A systematic review identified tactile assessments used in children with cerebral palsy (CP), but their reproducibility is unknown. Sixteen children with unilateral CP and 31 typically developing children (TDC) were assessed 2-4 weeks apart. Test-retest percent agreements within one point for children with unilateral CP (and TDC) were…

Auld, Megan Louise; Ware, Robert S.; Boyd, Roslyn Nancy; Moseley, G. Lorimer; Johnston, Leanne Marie

2012-01-01

63

Did Unilateral Divorce Raise Divorce Rates? Evidence from Panel Data  

Microsoft Academic Search

This paper revisits the evidence on the impact of unilateral divorce laws on divorce rates in the United States. Most states switched from requiring mutual consent to allowing unilateral or no-fault divorce between 1970 and 1985, while the national divorce rate more than doubled after 1965. According to the Coase theorem, however, the legal shift should have had no effect

Leora Friedberg

1998-01-01

64

Unilateral retinitis pigmentosa: a proposal of genetic pathogenic mechanisms  

PubMed Central

Purpose To investigate and integrate anatomic and physiologic findings from a group of patients who present retinitis pigmentosa affecting just one eye and use this information to propose mechanisms of disease pathogenesis. Methods This prospective cross-sectional study examined 5 patients, all female, from 8 to 60 years old. The study was conducted in 4 university hospitals. The patients were selected according to the characteristics of ocular involvement, notably unilateral presentation of similar anatomic and functional abnormalities. Full-field electroretinogram, fundus photography, fundus autofluorescence, infrared imaging, optical coherence tomography, and genetic testing were performed. Results Full-field electroretinogram showed unilateral decrease in amplitude and increase in implicit time; autofluorescence showed unilateral areas of decreased intensity. The USH2AW4149R mutation was confirmed in one patient. Conclusions Imaging and functional testing are important in elucidating the unilateral pattern of the disease and in monitoring these individuals. Mosaicism or somatic mutation may cause unilateral genetic disease presentation. PMID:22139616

Marsiglia, Marcela; Duncker, Tobias; Peiretti, Enrico; Brodie, Scott E.; Tsang, Stephen H.

2013-01-01

65

Functional outcomes following surgical treatment of bilateral mandibular condylar fractures.  

PubMed

Debate continues regarding unilateral or bilateral treatment for mandibular condylar fractures. This retrospective study evaluates the functional outcomes of bilateral condylar process fractures after surgical intervention. From May 1994 to December 2004, 51 adult patients with bilateral mandibular condylar process fractures were studied. There were 33 cases of bilateral condylar fractures (type I); 12 cases of condylar-subcondylar fractures (type II); and six cases of bilateral subcondylar fractures (type III). All patients underwent open reduction and internal fixation. Four patients had chin deviation, six had malocclusion, three had poor chewing function and eight had limited mouth opening. Type I patients had a significantly higher incidence of limited mouth opening (P=0.039) and associated maxillary fractures (n=12) and psychiatric disease (n=6) which yielded significantly poor functional outcomes. Complications included transient facial paresis (n=4), fracture and loosening of postoperative plates (n=3) and surgical wound infections (n=2). Open reduction with rigid fixation for bilateral condylar fractures provided satisfactory functional outcomes in this study. Concomitant maxillary fractures and underlying psychiatric problems are poor outcome factors. Aggressive rehabilitation in the first 9 months is important for early functional recovery. PMID:20961735

Chen, C-T; Feng, C-H; Tsay, P-K; Lai, J-P; Chen, Y-R

2011-01-01

66

EFFECTS OF UNILATERAL CASTRATION AND UNILATERAL CRYPTORCHIDISM OF THE HOLSTEIN BULL ON IN VITRO LEYDIG CELL RESPONSE 1'2  

Microsoft Academic Search

Summary The effects of unilateral castration (UC) and induced unilateral cryptorchidism (CR) on in vitro Leydig cell function were determined utilizing 36 Holstein bulls altered at either 3, 6 or 9 mo of age. Testes were removed 11 mo after gonadal manipulation and Leydig cells were dispersed in media containing 0 or 75 ng luteinizing hormone (LH). After incubation for

F. R. Boockfor; M. A. Barnes; J. F. Dickey

2010-01-01

67

Fabrication of a unilateral oral commissure retractor.  

PubMed

The fabrication of a unilateral device to treat microstomia after trauma is presented. Maximum opening was recorded before treatment. A dual arch impression that captured the dentition and commissure on the affected side was made with vinyl polysiloxane (VPS) impression material. A 1 mm vacuum formed template (VFT) was fabricated over the maxillary dentition, and a 2 mm VFT was fabricated around the commissure. A 0.9 mm (0.036") stainless steel wire was attached with acrylic resin to both templates in order to apply a constant force to the commissure. The use of a helix in the wire allowed for flexibility and adjustment of the retractor. The patient was instructed to wear the retractor for 6 hours per day, and, during a 10-week period, the maximum opening increased from 30 mm to 45 mm. PMID:23217473

Alfano, Stephen G; Lemus, Frank E

2012-12-01

68

Unilateral muscle contractions enhance creative thinking.  

PubMed

Following the notion of relative importance of the right hemisphere (RH) in creative thinking, we explored the possibility of enhancing creative problem solving by artificially activating the RH ahead of time using unilateral hand contractions. Participants attempted to complete the Remote Associates Test after squeezing a ball with either their left or right hand. As predicted, participants who contracted their left hand (thus activating the RH) achieved higher scores than those who used their right hand and those who did not contract either hand. Our findings indicate that tilting the hemispheric balance toward the processing mode of one hemisphere by motor activation can greatly influence the outcome of thought processes. Regardless of the specific mechanism involved, this technique has the potential for acting as a therapeutic or remedial manipulation and could have wide applications in aiding individuals with language impairments or other disorders that are believed to be related to hemispheric imbalances. PMID:21169586

Goldstein, Abraham; Revivo, Ketty; Kreitler, Michal; Metuki, Nili

2010-12-01

69

Unilateral Idiopathic Macular Telangiectasia with Choroidal Neovascularization.  

PubMed

A 40-year-old man with decreasing visual acuity in his left eye over 1 year, diagnosed elsewhere as vein occlusion and treated unsuccessfully by systemic steroids was reported. Retrospective analysis of available previous imaging studies was undertaken, and a retrospective diagnosis of idiopathic macular telangiectasia (IMT) was made. Examination revealed subfoveal neovascularization and retinochoroidal anastomosis (RCA) in his left eye with macular edema and exudates surrounding it. The right eye was normal. Current fluorescein angiography (FA) confirmed the presence of choroidal neovascularization and RCA, and optical coherence tomography (OCT) demonstrated cystoid macular edema and subfoveal neovascularization.The patient was diagnosed with unilateral idiopathic macular telangiectasia complicated by subretinal neovascularization. The presences of a choroidal neovascularization process and an RCA have not, to our knowledge, been reported in this type of IMT. PMID:20337307

Mezad-Koursh, Daphna; Zayit-Soudry, Shiri; Barak, Adiel; Loewenstein, Anat

2010-03-01

70

Unilateral temporomandibular joint ankylosis with contralateral aplasia  

PubMed Central

The temporomandibular joint (TMJ) is considered as one of the complex joints of the human body. Mandibular condylysis is distinguished from condylar aplasia by its non-association with aural/facial anomalies, and also as normal development appears to proceed until the lytic event occurs. It is further distinguished from primary and secondary condylar hypoplasia by the following: Absence of condyle rather than it being small, the normal development appears to proceed until the lytic event occurs, and its non-association with aural/facial anomalies or temporomandibular ankylosis. In the present report, a patient with a unilateral missing mandibular condyle with contralateral TMJ ankylosis is presented and the treatment is outlined and discussed. PMID:24665190

Singh, Nimisha; Pal, U. S.; Mohammad, S.; Singh, R. K.; Mehta, Gagan; Makadia, Hardik S.

2013-01-01

71

Vestibular perception following acute unilateral vestibular lesions.  

PubMed

Little is known about the vestibulo-perceptual (VP) system, particularly after a unilateral vestibular lesion. We investigated vestibulo-ocular (VO) and VP function in 25 patients with vestibular neuritis (VN) acutely (2 days after onset) and after compensation (recovery phase, 10 weeks). Since the effect of VN on reflex and perceptual function may differ at threshold and supra-threshold acceleration levels, we used two stimulus intensities, acceleration steps of 0.5°/s(2) and velocity steps of 90°/s (acceleration 180°/s(2)). We hypothesised that the vestibular lesion or the compensatory processes could dissociate VO and VP function, particularly if the acute vertiginous sensation interferes with the perceptual tasks. Both in acute and recovery phases, VO and VP thresholds increased, particularly during ipsilesional rotations. In signal detection theory this indicates that signals from the healthy and affected side are still fused, but result in asymmetric thresholds due to a lesion-induced bias. The normal pattern whereby VP thresholds are higher than VO thresholds was preserved, indicating that any 'perceptual noise' added by the vertigo does not disrupt the cognitive decision-making processes inherent to the perceptual task. Overall, the parallel findings in VO and VP thresholds imply little or no additional cortical processing and suggest that vestibular thresholds essentially reflect the sensitivity of the fused peripheral receptors. In contrast, a significant VO-VP dissociation for supra-threshold stimuli was found. Acutely, time constants and duration of the VO and VP responses were reduced - asymmetrically for VO, as expected, but surprisingly symmetrical for perception. At recovery, VP responses normalised but VO responses remained shortened and asymmetric. Thus, unlike threshold data, supra-threshold responses show considerable VO-VP dissociation indicative of additional, higher-order processing of vestibular signals. We provide evidence of perceptual processes (ultimately cortical) participating in vestibular compensation, suppressing asymmetry acutely in unilateral vestibular lesions. PMID:23671577

Cousins, Sian; Kaski, Diego; Cutfield, Nicholas; Seemungal, Barry; Golding, John F; Gresty, Michael; Glasauer, Stefan; Bronstein, Adolfo M

2013-01-01

72

Forearm Fractures in Children  

MedlinePLUS

... of the bones in the forearm. Classifications • Torus fracture. This is also called a “buckle” fracture. The ... of bone have not separated apart (displaced). • Metaphyseal fracture. The fracture is across the upper, or lower, ...

73

Hydraulic fracturing-1  

SciTech Connect

This book contains papers on hydraulic fracturing. Topics covered include: An overview of recent advances in hydraulic fracturing technology; Containment of massive hydraulic fracture; and Fracturing with a high-strength proppant.

Not Available

1990-01-01

74

Computer and Robotic Model of External Fixation System for Fracture Treatment  

Microsoft Academic Search

\\u000a A computer graphic model combined with a robotic model of a unilateral external fixation system for a fractured tibia was\\u000a developed to simulate the pre-operative planning of bone fracture and deformity correction by adjustment of fixator joints.\\u000a An inverse kinematics analysis algorithm was developed to quantify the necessary rotations and translations at each joint\\u000a of the fixator. The graphic model

Yoon Hyuk Kim; Soon-geul Lee

2004-01-01

75

Burned unilateral half-cheek resurfacing techniques.  

PubMed

Postburn cheek deformities are a tragedy for patients and pose a great challenge to surgeons due to a limited number of well-matching donor sites. In cases of unilateral half-cheek deformity, the flap's skin should match the contralateral cheek and the residual skin of the deformed cheek. The skin of a distant flap does not match the facial skin and resembles a patch. The most suitable skin type is the neck's skin and residual cheek's skin transposed on the defect with special techniques. Seventy-six patients with unilateral cheek scars covering nearly half of cheek's surface (total cheek deformities are not included in this series) were personally operated. The deformities were divided into four types or forms: lower cheek, lateral, medial, and upper. The flaps and techniques were designed for each type. The cervical skin, residual cheek skin, and periauricular skin (most matching the cheek's skin) was used in form of different flaps, depending on the scar location on the cheek. The basic flap used was the cervical split flap which could include A) a thoracic adipose-cutaneous layer (cervico-thoracic flap); B) periauricular fasciocutaneous layer (cervico-periauricular and cervico-thoraco-periauricular flaps); C) residual healthy facial adipocutaneous layer (cervico-facial, cervico-facio-periauricular, and cervico-thoraco-facioperiauricular flaps). Cervical flap has axial circulation and is elevated without platysma; it is transposed on the cheek with some tension. The lower and lateral cheek deformities were eliminated most successfully with the cervico-thoraco-periauricular flap by one-stage procedure. Medial and upper cheek deformities were eliminated with the cervico-facio-thoraco-periauricular flap. The facial segment can be expanded (usually in cases of upper cheek reconstruction); in such cases, the thoracic region is not included in the flap (cervico-facio-periauricular flap). The cheeks were reconstructed in all patients without serious complications. The flap's skin matched the contralateral cheek and surrounding healthy skin; the donor site's damage was minimal; operation scars' line was maximally shortened. The use of cervical split flap in combination with thoracic, facial, and periauricular adipose-cutaneous layer opens, in author's opinion, a reliable and most successful way for postburn half-cheek resurfacing. PMID:22210070

Grishkevich, Viktor M

2012-01-01

76

A transaction cost approach to unilateral presidential action  

E-print Network

when presidents will act unilaterally through executive orders and when they will instead seek legislative avenues to policy change. This project develops a parsimonious theory grounded in the transaction costs framework that explains how a president...

Marchbanks, Miner Peek, III

2006-04-12

77

Numerical Investigation of Interaction Between Hydraulic Fractures and Natural Fractures  

E-print Network

Hydraulic fracturing of a naturally-fractured reservoir is a challenge for industry, as fractures can have complex growth patterns when propagating in systems of natural fractures in the reservoir. Fracture propagation near a natural fracture (NF...

Xue, Wenxu

2011-02-22

78

Fractures of the shaft of the tibia treated with Hoffmann external fixation  

Microsoft Academic Search

Ninety-six compound or unstable fractures of the tibial shaft were treated with external fixation of different mountings. The median healing time was 10 months without a statistically significant difference between the healing time after treatment with unilateral frames and quadrilateral frames. The rate of pin-track infection was 36%, which is comparable to those of other published series. Seven cases of

H. A. Schrøder; H. Christoffersen; T. Scherff Sørensen; S. Lindequist

1986-01-01

79

Symptomatic unilateral renal angiomyolipoma in a child with tuberous sclerosis.  

PubMed

We report a case of unilateral renal angiomyolipoma in a 10-year-old boy with tuberous sclerosis. The case is worthy of attention because the symptoms occurred at an early age and because the lesion was unilateral, the latter confirmed at 11-year follow-up. The presentation and treatment are discussed, and the pertinent literature is reviewed. The case demonstrates that it is of clinical importance to monitor renal involvement in children with tuberous sclerosis. PMID:11598456

Avolio, L; Savasta, S; Matteotti, C; Fusillo, M; Bragheri, R

2001-01-01

80

The effects of plyometric exercise on unilateral balance performance  

Microsoft Academic Search

The purpose of this study was to determine the effects of plyometric exercise on unilateral balance performance. Nine healthy adults performed baseline measurements on the dominant limb that consisted of: a 20-s unilateral stability test on a tilt balance board, where a higher stability index represented deterioration in balance performance; isokinetic plantar flexion torque at 0.52 and 3.14 rad · s; muscle

Craig Twist; Nigel Gleeson; Roger Eston

2008-01-01

81

Unilateral condylar hyperplasia: A case report and review of literature  

PubMed Central

Condylar hyperplasia is (CH) an uncommon malformation of the mandible involving change in size and morphology of the condylar neck and head. CH is an anomaly that usually occurs unilaterally and equally affects in both men and women. Hyperplasia of the condyle ‘differentiated into hemimandibular hyperplasia, hemimandibular elongation and CH. Here, we are presenting a case of 17-year-old male patient with unilateral CH and its review of the literature. PMID:24818099

Bharathi, Saravana C.; Senthilnathan, S.; Kumar, Lokesh D.; Mohan, Anand C. S.; Taranath, M.

2014-01-01

82

Grip Force Coordination during Bimanual Tasks in Unilateral Cerebral Palsy  

ERIC Educational Resources Information Center

Aim: The aim of the study was to investigate coordination of fingertip forces during an asymmetrical bimanual task in children with unilateral cerebral palsy (CP). Method: Twelve participants (six males, six females; mean age 14y 4mo, SD 3.3y; range 9-20y;) with unilateral CP (eight right-sided, four left-sided) and 15 age-matched typically…

Islam, Mominul; Gordon, Andrew M.; Skold, Annika; Forssberg, Hans; Eliasson, Ann-Christin

2011-01-01

83

The impacts of Unilateral Stratospheric Geoengineering  

NASA Astrophysics Data System (ADS)

Stratospheric geoengineering proposals have been suggested on the premise that the cooling impacts of volcanic eruptions could be deliberately mimicked to offset the impacts of increased greenhouse gas concentrations in the future by counterbalance global warming. Here, we examine both the impacts of hemispherically asymmetric volcanoes in the observational record and the impact of prolonged deliberate injection of stratospheric aerosol into either the northern or southern hemisphere stratosphere or into both hemispheres equally to assess the impacts on Sahelian rainfall and agriculture (Haywood et al., 2013). While the frequency of volcanic eruptions during the past 100 years is too sparse for definitive attribution, there is a suggestion that volcanic eruptions that preferentially load the northern hemisphere are the harbinger of Sahelian drought. Simulations are then performed with the HadGEM2 couple atmospheric-ocean model to assess the impacts of these volcanic eruptions and deliberate unilateral stratospheric geoengineering. Figure 1 shows the impacts of the geoengineering simulations which show that stratospheric injection into the northern hemisphere induces a severe and prolonged Sahelian drought with undoubted detrimental consequences for the local population. Conversely injection into the southern hemisphere causes a significant greening of the Sahel with vegetation productivity enhanced by over 100%. On the face of it, this suggests potential advocacy of injection into the southern hemisphere: we will investigate potential other side-effects from such a strategy...... Haywood, J.M., A. Jones, N. Bellouin, and D.B. Stephenson, Asymmetric forcing from stratospheric aerosols impacts Sahelian drought, Nature Climate Change, Vol 3, No 7, 660-665, doi: 10.1038/NCLIMATE1857, 2013.

Jones, A.; Haywood, J. M.; Bellouin, N.; Stephenson, D.

2013-12-01

84

Perception of colour in unilateral tritanopia.  

PubMed Central

The unilateral tritanope described in the previous paper (Alpern, Kitahara & Krantz, 1983) was able to match every narrow-band light presented to his tritanopic eye with lights from a tristimulus colorimeter viewed in the adjacent field by the normal eye. In two regions of the spectrum (called isochromes) physically identical lights appeared identical to the observer's two eyes. One isochrome was close to 'blue' for the normal eye, the other was in the long-wave spectral region seen by the normal eye predominantly as 'red'. Between these isochromes the normal eye required less than spectral purity to match, dropping to near zero purity at 560-570 nm. A mixture of the two isochromes that appeared purple to the normal eye appeared neutral to the tritanopic eye. Hence dichoptic matches grossly violate Grassmann's additivity law. For the normal eye colour naming conformed to typical normal results. For the tritanopic eye the results were coherent with those found by dichoptic matching: the spectrum was divided into two regions by the achromatic neutral band. To the short-wave side, only the colour names 'blue' and 'white' were ever used. To the long-wave side the predominant colour names were 'red' and 'white' with some 'yellow'. Spectral lights appeared neither 'red-blue' nor greenish. Surrounding the test with an annulus either 430 nm, 650 nm, or a mixture of these, fails to induce any greenish appearance, although the achromatic band shifted in the expected directions. It is concluded that there must be exactly three functionally independent, essentially non-linear central codes for colour perception, and that these codes are different from those suggested in existing theories of colour perception. PMID:6603509

Alpern, M; Kitahara, K; Krantz, D H

1983-01-01

85

[Stress fractures].  

PubMed

In spite of the fact that the first description of stress fracture appeared 130 years ago, its origins still remain unknown. There are numerous potential factors causing fractures in some circumstances. It is sure that this is the result of disharmony of overstrain (bending force or compression force) of groups of muscles on the one hand and skeletal carrying capacity, i. e. one skeletal segment on the other hand. In differential diagnosis, particular attention is to be paid to some localizations, firstly to tibia and femur, since sometimes they are similar to osteomyelitis, osteoid-osteoma or osteogenic sarcoma. It may be supposed that the number of cases constantly grows, corresponding to higher number of participants of various sports and of different age, to be determined by the application of new diagnostic methods, revealing the development of the process far earlier than x-ray (scintiphotography, thermography, ultrasonography and CT). The majority of cases are successfully treated and cured by conservative methods, frequently only by resting, while only rarely there are cases with shift of segments and indicated surgical treatment. A lot of cases are asymptomatic. In the period from 1981 to 1986, we clinically registered 113 cases of stress fractures with soldiers, 105 of them of metatarsus bones, 4 of tibia, 3 of fibular malleolus and 1 of cuboid bone. PMID:2796582

Posinkovi?, B; Pavlovi?, M

1989-01-01

86

Distal radius triplane fracture.  

PubMed

A triplane fracture is so named because of the three planes traversed by the fracture line. These are physeal fractures that result from injury during the final phase of maturation and cessation of growth. This fracture pattern typically involves the distal tibia. We present a rare case of a triplane fracture involving the distal radius. PMID:25350166

Parkar, Aah; Marya, S; Auplish, S

2014-11-01

87

Faster imaging with a portable unilateral NMR device.  

PubMed

Unilateral NMR devices are important tools in various applications such as non-destructive testing and well logging, but are not applied routinely for imaging, primarily because B0 inhomogeneity in these scanners leads to a relatively low signal and requires use of the slow single point imaging scan scheme. Enabling high quality, fast imaging could make this affordable and portable technology practical for various imaging applications as well as for new applications that are not yet feasible with MRI technology. The goal of this work was to improve imaging times in a portable unilateral NMR scanner. Both Compressed Sensing and Fast Spin Echo were modified and applied to fit the unique characteristics of a unilateral device. Two printed phantoms, allowing high resolution images, were scanned with both methods and compared to a standard scan and to a low pass scan to evaluate performance. Both methods were found to be feasible with a unilateral device, proving ways to accelerate single point imaging in such scanners. This outcome encourages us to explore how to further accelerate imaging times in unilateral NMR devices so that this technology might become clinically applicable in the future. PMID:23597948

Liberman, Asaf; Bergman, Elad; Sarda, Yifat; Nevo, Uri

2013-06-01

88

Radial head fracture - aftercare  

MedlinePLUS

Elbow fracture - radial head ... the radial bone, just below your elbow. A fracture is a break in your bone. The most common cause of a radial head fracture is breaking a fall with an outstretched arm.

89

Unilateral opercular infarction presenting with Foix-Chavany-Marie Syndrome.  

PubMed

A 76-year-old man with a history of pontine, cerebellar infaction suddenly became speechless during the procedure of percutaneous coronary intervention. On examination, he was unable to close his mouth voluntarily, but spontaneous closing was preserved when smiling. He had anarthria and hypophonia, although his comprehension was preserved. He also had a severe dysphagia. Radiological studies revealed an acute stroke in the left anterior operculum, indicating Foix-Chavany-Marie Syndrome (FCMS) caused by a unilateral opercular lesion. Pathophysiology of the previous cases reported as unilateral FCMS remains controversial, but in our case, it could be delineated by the combination of the new lesion in the unilateral operculum and the old one in the contralateral pons. Since FCMS is not only related to biopercular lesions, we should consider thorough radiologic examination to clarify its anatomic basis. PMID:23040957

Ohtomo, Ryo; Iwata, Atsushi; Tsuji, Shoji

2014-01-01

90

Clock-drawing test and unilateral spatial neglect.  

PubMed

We investigated the ability of 25 patients with left unilateral spatial neglect to make a clock face by putting numbers inside a printed circle. Impairment seen in this clock-drawing test did not parallel neglect severity as judged by results of the line-cancellation and line-bisection tests, as well as the copying of a daisy. The score for clock drawing correlated highly with the verbal WAIS score. Most neglect patients with a verbal IQ of 87 or more could draw a clock face fairly well and used planning in placing the numbers 12, 3, 6, and 9 before the others. In clock drawing, verbal intelligence may compensate for left unilateral spatial neglect. We therefore recommend use of the line-cancellation and line-bisection tests, as well as the copying test, but do not recommend use of the clock-drawing test in the diagnosis of left unilateral spatial neglect. PMID:8423871

Ishiai, S; Sugishita, M; Ichikawa, T; Gono, S; Watabiki, S

1993-01-01

91

Prepubertal unilateral gynecomastia in the absence of endocrine abnormalities  

PubMed Central

Gynecomastia is defined as the excessive development of breast tissue in males, which can occur as unilateral or bilateral. Although the overall prevalence of gynecomastia is 40%-65%, the prepubertal unilateral gynecomastia in the absence of endocrine abnormalities is unusual, with only a few case reports in literature. Idiopathic gynecomastia in prepuberty is benign but a diagnosis of exclusion. We here report two cases of healthy prepubertal boys aged 8.8 and 9.6 years old, respectively, presented with painful palpable mass in their unilateral breast. Breast tissue with glandular proliferation was confirmed on ultrasonography. Serum levels of estradiol, testosterone, and other laboratory findings were within normal range. They seem to have the prepubertal idiopathic gynecomastia but further follow-up to see their progression is needed.

Kang, Min; Lee, Chan Jae; Hwang, Il Tae; Lee, Kwanseop

2014-01-01

92

Proximal femoral fractures.  

PubMed

Fractures of the proximal femur include fractures of the head, neck, intertrochanteric, and subtrochanteric regions. Head fractures commonly accompany dislocations. Neck fractures and intertrochanteric fractures occur with greatest frequency in elderly patients with a low bone mineral density and are produced by low-energy mechanisms. Subtrochanteric fractures occur in a predominantly strong cortical osseous region which is exposed to large compressive stresses. Implants used to address these fractures must be able to accommodate significant loads while the fractures consolidate. Complications secondary to these injuries produce significant morbidity and include infection, nonunion, malunion, decubitus ulcers, fat emboli, deep venous thrombosis, pulmonary embolus, pneumonia, myocardial infarction, stroke, and death. PMID:12597064

Webb, Lawrence X

2002-01-01

93

Bite force in pre-orthodontic children with unilateral crossbite.  

PubMed

In the present study bite force was examined in pre-orthodontic children with unilateral posterior crossbite and compared with an age- and sex-matched control group. The sample comprised 52 children aged 7-13 years, 26 pre-orthodontic children with unilateral posterior crossbite (crossbite group), and 26 children with neutral occlusion (control group). Unilateral bite force was measured at the first molar by means of a pressure transducer. Furthermore, symptoms and signs of temporomandibular disorders (TMD) and number of teeth in contact in the intercuspal position (ICP) were recorded. In both groups, the maximum bite force increased significantly with age and with increasing stages of dental eruption, but the bite force in both sexes did not differ significantly. There were no significant differences in bite force between sides, but this was significantly smaller in the crossbite group than in the controls (P < 0.001). Regression analysis showed that stage of dental eruption (P < 0.001), number of teeth in occlusal contact (P < 0.01), and unilateral crossbite (P < 0.001) were the only variables significantly correlated with bite force. The number of teeth in contact was significantly smaller in the crossbite group than in the controls (P < 0.05) and the frequency of muscle tenderness was significantly higher in the crossbite group than in the controls (P < 0.05). These results suggest that differences in the muscle function associated with unilateral crossbite lead to a significantly smaller bite force in the crossbite group compared with controls and this difference did not diminish with age and development. These findings indicate that early treatment of unilateral posterior crossbite is advisable to optimize conditions for function. PMID:11890069

Sonnesen, L; Bakke, M; Solow, B

2001-12-01

94

Cold shivering activity after unilateral destruction of the vestibular apparatus  

NASA Technical Reports Server (NTRS)

The bioelectric activity of muscles (flexors and extensors of the forelimbs and hindlimbs) during cold shivering after unilateral destruction of the vestibular apparatus. It was found, that unilateral delabyrinthing produces bilateral facilitation of cold shivering in the flexor extremities more pronounced on the ipsilateral side. In the extensor muscles there was an absence of bioelectric activity both before and after delabyrinthing. Enhancement of cold shivering in the flexor extremities following intervention was evidently conditioned by removal of the inhibiting effect of the vestibulary apparatus on the function of special centers.

Kuzmina, G. I.

1980-01-01

95

Advances of unilateral mobile NMR in nondestructive materials testing.  

PubMed

Unilateral mobile NMR employs portable instrumentation with sensors, which are applied to the object from one side. Based on the principles of well-logging NMR, a hand-held sensor, the NMR-MOUSE (MObile Universal Surface Explorer) has been developed for nondestructive materials testing. In the following, a number of new applications of unilateral NMR in materials science are reviewed. They are the state assessment of polyethylene pipes, the characterization of wood, the in situ evaluation of stone conservation treatment, high-resolution profiling of rubber tubes and 2-D imaging for defect analysis in rubber products. PMID:15833612

Blümich, Bernhard; Casanova, Federico; Perlo, Juan; Anferova, Sophia; Anferov, Vladimir; Kremer, Kai; Goga, Nicolae; Kupferschläger, Klaus; Adams, Michael

2005-02-01

96

Femur Shaft Fractures (Broken Thighbone)  

MedlinePLUS

... common types of femoral sha fractures include: Transverse fracture. In this type of fracture, the break is ... horizontal line going across the femoral sha . Oblique fracture. This type of fracture has an angled line ...

97

Ankle fracture - aftercare  

MedlinePLUS

An ankle fracture is a break in 1 or more ankle bones. These fractures may: Be partial (the bone is only partially ... Severe ankle fractures may require surgery. Fractures that may need surgery if: The ends of the bone are out of line ...

98

Orbital trapdoor fractures  

PubMed Central

Orbital trapdoor fractures are commonly encountered in children. Awareness of trapdoor fractures is of particular importance. This is because early recognition and treatment are necessary to prevent permanent motility abnormities. In this article, we will provide a brief overview of orbital fractures. The clinical and radiographic features of trapdoor fractures will then be reviewed, followed by a discussion on their proper management. PMID:23961006

Phan, Laura T.; Jordan Piluek, W.; McCulley, Timothy J.

2012-01-01

99

Fracture channel waves  

SciTech Connect

The properties of guided waves which propagate between two parallel fractures are examined. Plane wave analysis is used to obtain a dispersion equation for the velocities of fracture channel waves. Analysis of this equation demonstrates that parallel fractures form an elastic waveguide that supports two symmetric and two antisymmetric dispersive Rayleigh channel waves, each with particle motions and velocities that are sensitive to the normal and tangential stiffnesses of the fractures. These fracture channel waves degenerate to shear waves when the fracture stiffnesses are large, to Rayleigh waves and Rayleigh-Lamb plate waves when the fracture stiffnesses are low, and to fracture interface waves when the fractures are either very closely spaced or widely separated. For intermediate fracture stiffnesses typical of fractured rock masses, fracture channel waves are dispersive and exhibit moderate to strong localization of guided wave energy between the fractures. The existence of these waves is examined using laboratory acoustic measurements on a fractured marble plate. This experiment confirms the distinct particle motion of the fundamental antisymmetric fracture channel wave (A{sub 0} mode) and demonstrates the ease with which a fracture channel wave can be generated and detected. {copyright} 1999 American Geophysical Union

Nihei, K.T.; Yi, W.; Myer, L.R.; Cook, N.G. [Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California (United States)] [Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, California (United States); Schoenberg, M. [Schlumberger-Doll Research, Ridgefield, Connecticut (United States)] [Schlumberger-Doll Research, Ridgefield, Connecticut (United States)

1999-03-01

100

Cerebellar dysplasia and unilateral cataract in Marinesco-Sjörgen syndrome  

Microsoft Academic Search

The classic features of Marinesco-Sjögren syndrome include bilateral cataracts, cerebellar ataxia, and mental deficiency with an autosomal recessive inheritance pattern. Weakness and a variety of other characteristics are present inconsistently. A limited number of neuroimaging studies have indicated that cerebellar hypoplasia is the most common finding. We report a patient with near normal intelligence, unilateral cataract, and the previously unreported

Tracy E. Williams; Jeffrey R. Buchhalter; Michael D. Sussman

1996-01-01

101

Prism adaptation and unilateral neglect: Review and analysis  

Microsoft Academic Search

Theory and data from normal prism adaptation are applied toward understanding the ameliorating effects of prism adaptation for left unilateral neglect patients. Neglect is proposed to be, at least in part, a dysfunction in selection of the region of space appropriate for the task at hand. Normally, a task-work space is strategically sized and positioned (calibrated) around the task-relevant objects.

Gordon M. Redding; Benjamin Wallace

2006-01-01

102

Vestibulo-ocular and optokinetic impairments in left unilateral neglect  

Microsoft Academic Search

Right brain damaged patients affected by left unilateral neglect (N+) typically fail to explore the contralesional space. For the first time, this study investigates the dynamic and spatial features of the horizontal vestibular–ocular response (VOR), the optokinetic response (OKR) and the VOR–OKR interaction in six N+ and in five right brain damaged patients without neglect (N?). No lateral asymmetry of

Fabrizio Doricchi; Isabelle Siegler; Giuseppe Iaria; Alain Berthoz

2002-01-01

103

Bilateral Effects of Unilateral Cochlear Implantation in Congenitally Deaf Cats  

E-print Network

Bilateral Effects of Unilateral Cochlear Implantation in Congenitally Deaf Cats Jahn N. O'Neil,1 deafness results in synaptic abnormalities in auditory nerve endings. These abnormalities are most at this synaptic junction. We sought to determine whether electrical stimulation of the congenitally deaf auditory

Ryugo, David K.

104

On unilateral divorce and the “selection of marriages” hypothesis  

Microsoft Academic Search

In this paper, the unilateral divorce law is modelled through the combination of exclusive rights on the marriage dissolution and alternative compensation rules benefiting to the parent having custody of the children. Their influence are studied both in the short run (probability and efficiency of divorce) and in the long run (selection of marriages). We show that a decrease in

Eric Langlais

2010-01-01

105

Unilateral lumbar facet joint hypertrophy causing nerve root irritation.  

PubMed

We present four cases of massive unilateral lumbar facet joint hypertrophy in an otherwise morphologically normal spine. All presented with a combination of low back pain and symptoms of entrapment of a single lumbar nerve root. The abnormality is best visualised by CT scanning and the results of surgical decompression by partial undercutting facetectomy are favourable. PMID:3190129

Wilde, G P; Szypryt, E P; Mulholland, R C

1988-09-01

106

Unilateral triplication of the collecting system in a horseshoe kidney.  

PubMed

We report on complete unilateral triplication of the collecting system and ureters in a patient with a horseshoe kidney. One of the ureteral segments was obstructed and the patient presented with urosepsis. To our knowledge, such a malformation has not been described previously. PMID:6887369

Pode, D; Shapiro, A; Lebensart, P

1983-09-01

107

EQUILIBRIUM PATHS OF MECHANICAL SYSTEMS WITH UNILATERAL CONSTRAINTS  

E-print Network

in structural mechanics is the determination of the static equilibrium path of a structure for varying valuesEQUILIBRIUM PATHS OF MECHANICAL SYSTEMS WITH UNILATERAL CONSTRAINTS PART I: THEORY M. Schulz and S theoretical formulation is required for simulating their behaviour. After showing that the equilibrium

Pellegrino, Sergio

108

Human ocular torsional position before and after unilateral vestibular neurectomy  

Microsoft Academic Search

The static ocular torsional position of both eyes of 23 patients was measured by means of fundus photographs one day before and one week after unilateral vestibular neurectomy for the treatment of acoustic neuroma, Ménière's disease or paroxysmal vertigo. The results showed that in all patients the vestibular neurectomy caused both eyes to tort (i.e. to roll around the visual

I. S. Curthoys; M. J. Dai; G. M. Halmagyi

1991-01-01

109

Traumatic glaucoma with features of unilateral pigment dispersion  

PubMed Central

Summary We report a patient with traumatic glaucoma with features of unilateral pigment dispersion. This rare form of secondary glaucoma has only been reported twice previously, with both patients demonstrating angle recession, indicating associated damage to the trabecular meshwork. To our knowledge, this is the first such case reported in which angle recession was absent. PMID:25097455

Bowler, Gordon; Ellul, Antony; Gouws, Pieter

2014-01-01

110

Bimanual Force Coordination in Children with Spastic Unilateral Cerebral Palsy  

ERIC Educational Resources Information Center

In this study bimanual grip-force coordination was quantified using a novel "Gripper" system that records grip forces produced while holding a lower and upper unit, in combination with the lift force necessary to separate these units. Children with unilateral cerebral palsy (CP) (aged 5-14 years, n = 12) were compared to age matched typically…

Smits-Engelsman, B. C. M.; Klingels, K.; Feys, H.

2011-01-01

111

Unilateral Spatial Neglect in The Late Stage of Alzheimer's Disease  

Microsoft Academic Search

We report two patients with presumptive diagnosis of dementia of the Alzheimer's type (AD) who manifested a clear unilateral neglect syndrome in the late stage of the disease. At onset, their cognitive profiles were broadly similar to the usual cases of degenerative dementia, but, as the disease progressed, neglect appeared, becoming gradually more severe. MRI showed more pronounced cerebral atrophy

Annalena Venneri; Roberta Pentore; Biagio Cotticelli; Sergio Della Sala

1998-01-01

112

Bill Goodwine California Institute of Technology Controllability with Unilateral  

E-print Network

Bill Goodwine California Institute of Technology Controllability with Unilateral Control Inputs Bill Goodwine and Joel Burdick December 13, 1996 Slide 0 In this talk we present a controllability test;Bill Goodwine California Institute of Technology Motivating Examples Many control systems have inputs

Goodwine, Bill

113

Perceptual awareness and its loss in unilateral neglect and extinction  

Microsoft Academic Search

We review recent evidence from studies of patients with unilateral neglect and\\/or extinction, who suffer from a loss of awareness for stimuli towards the affected side of space. We contrast their deficit with the effects of damage to primary sensory areas, noting that such areas can remain structurally intact in neglect, with lesions typically centred on the right inferior parietal

Jon Driver; Patrik Vuilleumier

2001-01-01

114

On the treatment of nonlinear unilateral contact problems  

Microsoft Academic Search

This paper is concerned with finite deformations of elastic bodies in the presence of unilateral constraints. The penalty formulation is applied to introduce the contact constraints. We develop special isoparametric contact elements. Starting from their Gaussian points the distance between the body and the obstacle is determined, where the obstacle is given as aC2 continuous function. Variation and subsequent consistent

P. Wriggers; M. Imhof

1993-01-01

115

Unilateral Galactorrhea Associated with Low-dose Escitalopram.  

PubMed

Galactorrhea is a rare adverse effect of selective serotonin reuptake inhibitor treatment. We report a 27-year-old woman who developed unilateral breast engorgement with galactorrhea 18 days after initiation of escitalopram (10 mg/day). The symptom remitted 7 days after withdrawal of escitalopram and did not subsequently recur during maintenance therapy with agomelatine (25 mg/day). PMID:25035569

Ravi, P Bangalore; Guruprasad, K G; Andrade, Chittaranjan

2014-07-01

116

Unilateral Galactorrhea Associated with Low-dose Escitalopram  

PubMed Central

Galactorrhea is a rare adverse effect of selective serotonin reuptake inhibitor treatment. We report a 27-year-old woman who developed unilateral breast engorgement with galactorrhea 18 days after initiation of escitalopram (10 mg/day). The symptom remitted 7 days after withdrawal of escitalopram and did not subsequently recur during maintenance therapy with agomelatine (25 mg/day). PMID:25035569

Ravi, P. Bangalore; Guruprasad, K. G.; Andrade, Chittaranjan

2014-01-01

117

Unilateral sacroiliitis as an unusual complication of acupuncture  

Microsoft Academic Search

Septic sacroiliitis in an uncommon disease and is rarely reported as a complication of acupuncture. We present a case of unilateral septic sarcoiliitis, which developed as a complication of acupuncture because of failure to sterilise the skin properly before treatment. Bone scan and computed tomography were positive for sacroiliitis. After a course of antibiotics with oxacillin for 6 weeks, the

Sheung-Mei Lau; Chung-Tei Chou; Chung-Ming Huang

1998-01-01

118

Unilateral radiation pneumonitis in sheep: Physiological changes and bronchoalveolar lavage  

SciTech Connect

Radiation pneumonitis is a life-threatening result of therapeutic thoracic irradiation, yet its mechanisms are poorly understood. We studied the effects of unilateral lung irradiation (3,000 rad) in sheep from the immediate response to the later development of radiation pneumonitis. We defined radiation pneumonitis by its diagnostic clinical feature, radiographic infiltration of the irradiated zone with a straight margin corresponding to the radiation port. The immediate response in the few hours after irradiation was characterized by cough, labored respiration, hypoxemia (arterial PO{sub 2} decreased 19 Torr), mild pulmonary hypertension (pulmonary arterial pressure increased 20%), and lymphopenia. Hemodynamics and gas exchange returned to normal by day 2 but became abnormal again before or during radiation pneumonitis at 32 +/- 2 days. Respiratory distress, hypoxemia, and pulmonary hypertension recurred during radiation pneumonitis. Bronchoalveolar lavage during radiation pneumonitis contained increased neutrophils (19 +/- 4%, control = 7%), increased protein (0.27 +/- 0.1 g/dl, control = 0.12 +/- 0.03), and severely impaired ability to lower surface tension. Alveolar macrophages from both lungs during unilateral radiation pneumonitis exhibited impaired generation of superoxide after phorbol myristate (only a 30% increase). Normal control alveolar macrophages increased superoxide production after stimulation greater than 400%. We conclude that unilateral lung irradiation in sheep causes a mild immediate response followed by radiation pneumonitis at 1 mo. Unilateral radiation pneumonitis in this model is associated with ipsilateral neutrophilic alveolitis, increased bronchoalveolar lavage protein, and impaired surfactant function, as well as bilateral functional abnormalities of alveolar macrophages.

Tillman, B.F.; Loyd, J.E.; Malcolm, A.W.; Holm, B.A.; Brigham, K.L. (Vanderbilt Univ. School of Medicine, Nashville, TN (USA))

1989-03-01

119

Weights of carotid endarterectomy specimens in patients undergoing unilateral procedures.  

PubMed

Analysis of 273 unilateral carotid endarterectomy specimens showed those in the men to be larger than those in the women (1.4 vs 0.96 g). A large weight variation was found. The smallest specimen weighed 0.38 g, and the largest weighed 4.2 g, a 10-fold difference; the mean weight was 1.25 g. PMID:12972132

Roberts, William Clifford; Laborde, Nolan Joseph; Pearl, Gregory John

2003-09-15

120

Psychosocial outcome of TBI in children with unilateral frontal lesions.  

PubMed

To evaluate effects of unilateral frontal lesions on psychosocial and global outcome of traumatic brain injury (TBI) in children, Study 1 compared matched groups of 22 school aged children who had sustained TBI either with or without unilateral frontal lesions. Study 2 evaluated effects of unilateral extrafrontal lesions in 18 TBI patients as compared with 18 nonlesional TBI patients. Communication, Daily Living, and Socialization domains and the Maladaptive Behavior Scale of the Vineland Adaptive Behavior Scales (VABS) were used to assess psychosocial outcome, and the Glasgow Outcome Scale (GOS) measured global outcome. All patients underwent magnetic resonance imaging at least 3 months post injury. Children with frontal lesions had worse scores on the Daily Living and Socialization domains and a higher frequency of maladaptive behavior than those without frontal lesions, but there was no difference in cognitive function. Disability was twice as common in the frontal lesion group relative to children without frontal lesions. Volume of frontal lesion was related to the Socialization domain. Side of lesion had no effect, nor did presence of an extrafrontal lesion (Study 2). Unilateral frontal lesions adversely affect late psychosocial outcome of TBI in children. PMID:15147589

Levin, Harvey S; Zhang, Lifang; Dennis, Maureen; Ewing-Cobbs, Linda; Schachar, Russell; Max, Jeffrey; Landis, Julie A; Roberson, Garland; Scheibel, Randall S; Miller, Daisy L; Hunter, Jill V

2004-05-01

121

A case of unilateral keloid after bilateral breast reduction  

Microsoft Academic Search

Keloid scar is a manifestation of abnormal wound healing in predisposed individuals. Many treatment modalities have been tried with varying degrees of success. Radiotherapy is one such modality that is widely recognised. We present a case report and literature review based on a patient who developed unilateral keloid scarring following bilateral breast reduction surgery. Some 4 years previously, she had

Haresh Devalia; Lucy Mansfield; Neda Minakaran; Dibyesh Banerjee

2008-01-01

122

Total versus hemithyroidectomy for small unilateral papillary thyroid carcinoma  

PubMed Central

The correct approach to treat low-risk intrathyroidal papillary thyroid carcinoma (PTC) is controversial. Specific authors advocate unilateral thyroidectomy to minimize perioperative morbidity. The purpose of the present study was to determine an effective treatment strategy for patients with small unilateral papillary thyroid. This was a retrospective comparative analysis of 161 patients with PTC treated between 2001–2010; 60 consecutive patients following hemithyroidectomy and 101 patients following total thyroidectomy. Only patients with preoperatively-predicted localized unilateral disease were included. No between-group difference was identified in the rate of permanent surgical complications. In total, 36 hemithyroidectomy patients (60%) exhibited benign thyroid nodules in the contralateral lobe on preoperative ultrasound; this factor was found to positively correlate with the performance of ?1 fine needle aspirations (FNAs) during follow-up. In addition, 47 hemithyroidectomy patients (78.3%) were prescribed thyroxine postoperatively. The hemithyroidectomy patients visited the endocrine clinic significantly less frequently than the total thyroidectomy patients (P=0.01), but were referred more often for neck ultrasound (P=0.03) and FNA (P<0.001). In addition, an increased number of patients in the hemithyroidectomy group were reoperated for suspected recurrent/persistent disease (P=0.06). Results of this retrospective study indicate that hemithyroidectomy for small unilateral PTC is associated with a significant follow-up burden and provides no clear patient benefit. PMID:24520302

HIRSCH, DANIA; LEVY, SIGAL; TSVETOV, GLORIA; SHIMON, ILAN; BENBASSAT, CARLOS

2014-01-01

123

Shipping and climate change: Scope for unilateral action  

E-print Network

Shipping and climate change: Scope for unilateral action Paul Gilbert, Tyndall Manchester Alice on international shipping emissions and climate change undertaken at The University of Manchester by the Tyndall considers the role that the shipping sector could play in mitigating total global emissions

Matthews, Adrian

124

Unilateral Forced Nostril Breathing Affects Dichotic Listening for Emotional Tones  

ERIC Educational Resources Information Center

Unilateral forced nostril breathing (UFNB) through the left nostril is associated with enhanced spatial abilities, whereas UFNB through the right nostril is associated with enhanced verbal abilities. However, the effects of UFNB on standard tasks of laterality (e.g., dichotic listening) are unknown. This study employed dichotic listening for word…

Saucier, Deborah M.; Tessem, Farzana Karim; Sheerin, Aaron H.; Elias, Lorin

2004-01-01

125

Unilateral Incompatibility in Capsicum (Solanaceae): Occurrence and Taxonomic Distribution  

PubMed Central

• Background and aims Unilateral incompatibility (UI) occurs when pollinations between species are successful in one direction but not in the other. Self-incompatible (SI) species frequently show UI with genetically related, self-compatible (SC) species, as pollen of SI species is compatible on the SC pistil, but not vice versa. Many examples of unilateral incompatibility, and all those which have been studied most intensively, are found in the Solanaceae, particularly Lycopersicon, Solanum, Nicotiana and Petunia. The genus Capsicum is evolutionarily somewhat distant from Lycopersicon and Solanum and even further removed from Nicotiana and Petunia. Unilateral incompatibility has also been reported in Capsicum; however, this is the first comprehensive study of crosses between all readily available species in the genus. • Methods All readily available (wild and domesticated) species in the genus are used as plant material, including the three genera from the Capsicum pubescens complex plus eight other species. Pollinations were made on pot-grown plants in a glasshouse. The number of pistils pollinated per cross varied (from five to 40 pistils per plant), depending on the numbers of flowers available. Pistils were collected 24 h after pollination and fixed for 3–24 h. After staining, pistils were mounted in a drop of stain, squashed gently under a cover slip and examined microscopically under ultra-violet light for pollen tube growth. • Key results Unilateral incompatibility is confirmed in the C. pubescens complex. Its direction conforms to that predominant in the Solanaceae and other families, i.e. pistils of self-incompatible species, or self-compatible taxa closely related to self-incompatible species, inhibit pollen tubes of self-compatible species. • Conclusions Unilateral incompatibility in Capsicum does not seem to have arisen to prevent introgression of self-compatibility into self-incompatible taxa, but as a by-product of divergence of the C. pubescens complex from the remainder of the genus. PMID:15229125

ONUS, A. NACI; PICKERSGILL, BARBARA

2004-01-01

126

Outcomes After Unilateral Uterine Artery Embolization: A Retrospective Review  

SciTech Connect

Purpose. Bilateral uterine artery embolization (UAE) is considered necessary to provide effective treatment for symptomatic uterine fibroids. Occasionally, only unilateral embolization is performed, and this study evaluates these outcomes. Materials and Methods. As part of a prospective observational study of more than 1600 patients treated with UAE since 1996, there have been 48 patients in whom unilateral embolization has been performed. This study retrospectively reviews clinical response as assessed by our standard questionnaire and radiological response assessed by either magnetic resonance imaging or ultrasound. Results. Two principal groups emerged: the largest, where only the dominant unilateral arterial supply was electively embolized (30 patients); and the second, where there was technical failure to catheterize the second uterine artery as a result of anatomical constraints (12 patients). Favorable clinical response with a reduction in menorrhagia at 1 year was seen in 85.7% (18/21) of those patients with a dominant arterial supply to the fibroid(s). In contrast, in those patients where there was technical failure to embolize one uterine artery, there was a high rate of clinical failure requiring further intervention in 58.3% (7/12). Comparison of the technical failure group with the dominant uterine artery group demonstrated a statistically significant (Fisher's exact test) difference in the proportion of patients with evidence of persistent fibroid vascularity (p < 0.001) and requiring repeat intervention (p < 0.01). Conclusion. We conclude that unilateral UAE can achieve a positive clinical result in the group of patients where there is a dominant unilateral artery supplying the fibroid(s), in contrast to the poor results seen following technical failure.

Bratby, M. J. [St George's Hospital, Radiology Department (United Kingdom); Hussain, F. F.; Walker, W. J. [Royal Surrey County Hospital, Radiology Department (United Kingdom)], E-mail: wj.walker@virgin.net

2008-03-15

127

Unilateral electronegative ERG of non-vascular aetiology  

PubMed Central

Background: Full field and pattern electroretinograms (ERG, PERG) are performed to assess generalised retinal function and macular function, respectively. An (electro) negative full field ERG usually describes an ISCEV standard maximal response in which the b-wave is smaller than a normal or minimally reduced a-wave and indicates dysfunction that is post-phototransduction. The most common cause of a unilateral negative ERG is central retinal artery occlusion (CRAO) or birdshot chorioretinopathy (BCR). This study examines the clinical and electrophysiological features of patients with unilateral negative ERG who do not have CRAO or BCR. Methods: 12 patients were ascertained with a unilateral negative ERG in whom a vascular aetiology and BCR were excluded. Most presented with symptoms of central retinal dysfunction. In 11 of the 12 patients additional long duration photopic stimuli were used to test cone system ON and OFF responses. Results: All 12 patients had unilateral electronegative bright flash full field ERGs indicating total or relative preservation of rod photoreceptor function, but dysfunction post-phototransduction. Seven of these patients had non-specific inflammatory changes in the eye with the negative ERG. Six patients, including five with inflammatory signs, had involvement of the cone ON response with complete preservation of cone OFF responses. A further three patients showed evidence of cone ON response abnormality with less severe OFF response involvement. Conclusion: The ERGs in this heterogeneous group of patients predominantly showed post-phototransduction involvement of the ON pathways. Sparing of the cone OFF response was often observed. The majority of patients had signs of previous inflammation and it is speculated that these highly unusual unilateral changes may be mediated via an autoimmune mechanism. PMID:16299143

Robson, A G; Richardson, E C; Koh, A H C; Pavesio, C E; Hykin, P G; Calcagni, A; Graham, E M; Holder, G E

2005-01-01

128

Intravenous Application of CD271-selected Mesenchymal Stem Cells during Fracture Healing  

PubMed Central

Objectives Circulating mesenchymal stem cells (MSCs) participate in fracture healing and can be used to enhance fracture healing. This study investigated how CD271-selected MSCs travel in circulation and when it is the optimal time to apply MSCs intravenously during fracture healing. Methods Based on the expression of CD271, MSCs were isolated from human bone marrow and labeled with cypate, a near infrared fluorochrome. A unilateral closed fracture was created at the femur in immunodeficient mice. The cypate-labeled MSCs were injected into the tail vein of the mice at days 1 and 3 after fracture, and were tracked by near infrared imaging. The mice were euthanized at 3 weeks after fracture. Immunohistochemistry was performed to detect human MSCs at the fracture sites. Migration of CD271-selected MSCs, under the influence of stem cell derived factor-1 (SDF-1), was assessed in vitro. Results Intravenously injected at day1, but not day 3, after fracture, CD271-selected MSCs accumulated at the fracture sites significantly and that lasted for at least 7 days. All fractures, with or without MSC injections, healed in 3 weeks. Human cells were localized at the fracture sites in mice by immunohistochemistry. CD271-selected MSCs migrated toward the medium contained SDF-1 in vitro. Conclusions After intravenous injection, CD271-selected MSCs were recruited to fracture sites. The stages of fracture healing influenced the homing of culture-expanded MSCs. In mice, an optimal window of intravenous injection of MSCs was around 24 hours after fracture. Clinical Relevance Intravenous application of MSCs may serve as a practical route to deliver stem cells for the treatment of fracture non-union and delayed union. Levels of evidence Level I PMID:24378433

Dreger, Tina; Watson, John Tracy; DVM, Walter Akers; Molligan, Jeremy; Achilefu, Samuel; Schon, Lew C.; Zhang, Zijun

2014-01-01

129

Retromandibular approach for reduction and fixation of mandibular condylar fractures: a clinical experience.  

PubMed

This study evaluated the efficiency and safety of a retromandibular approach to reduce and fix displaced condylar fractures. The study group included 31 patients who had undergone surgery for 35 condylar fractures (8 bilateral, 23 unilateral). Consultants and residents had performed the procedure. Inclusion criteria were: patient's choice for open reduction and fixation; displaced unilateral condylar fractures with occlusal derangement; bilateral condylar fractures with anterior open bite. Restriction of lateral movement towards the unaffected side was observed preoperatively in all cases taken up. There was a difference in the lateral movements towards the fractured side (mean 7.2) and unaffected side (mean 4.2) during the first postoperative review. Functional occlusion identical to the preoperative occlusion and good reduction of the condyles was noted in all cases. Facial nerve was encountered in 6 cases (17%) intraoperatively. There was one case (3%) of temporary facial nerve weakness, which resolved within 2 weeks. There was no permanent facial nerve damage in any patient. The retromandibular-transparotid approach seems to be a safe and efficient method for reduction and internal fixation of condylar fractures with little or no risk to the branches of facial nerve. PMID:19467846

Narayanan, V; Kannan, R; Sreekumar, K

2009-08-01

130

Simultaneous bilateral tibial tubercle avulsion fracture in an adolescent: a case report and review of the literature.  

PubMed

Avulsion fractures of the tibial tubercle are uncommon. Bilateral tibial tubercle avulsion fractures are extremely rare. In this article, we describe Watson-Jones type III simultaneous bilateral tibial tubercle avulsion fractures in a 17-year-old boy who fell on the ground while taking off in high jump in sport. An open anatomic reduction and internal fixation was performed. We report here on the successful surgical treatment of a simultaneous bilateral fracture of the tibial tuberosity in an adolescent. These types of fractures involve a growth plate, extend through the articular surface and appear to do well with open reduction and secure internal fixation despite their bilateral nature, with recovery and functional outcome comparable to results from unilateral tibial tubercle avulsion fractures. PMID:16917786

Georgiou, Georgios; Dimitrakopoulou, Alexandra; Siapkara, Angeliki; Kazakos, Konstantinos; Provelengios, Stefanos; Dounis, Elefterios

2007-02-01

131

Offspring of patients treated for unilateral Wilms' tumor in childhood  

SciTech Connect

Twenty-seven women and the wives of nine men who survived unilateral Wilms' tumor in childhood had a total of 59 live born offspring. Among the 33 infants born to women who had received orthovoltage abdominal irradiation, ten weighed less than 2500 g at birth and three died during the perinatal period. In addition, one term infant of normal weight died of complications of a breech delivery. Only one of 26 infants born to the wives of Wilms' tumor patients and unirradiated female patients weighed less than 2500 g at birth and none died. The frequency of congenital malformations and spontaneous abortions in this series was not increased, and no offspring has developed cancer. The findings suggest that the risk of Wilms' tumor is low among progeny of survivors of nonfamilial, unilateral lesions. Damage from abdominal irradiation given to girls with Wilms' tumor may predispose them to the subsequent delivery of low birthweight children.

Green, D.M.; Fine, W.E.; Li, F.P.

1982-01-01

132

Global suppression of electrocortical activity in unilateral perinatal thalamic stroke  

PubMed Central

We present an unusual case of persistent generalized electroencephalography (EEG) suppression and right-sided clonic seizures in a male infant born at 40+2 weeks' gestation, birthweight 3240g, with an isolated unilateral thalamic stroke. The EEG at 13 hours after birth showed a generalized very low amplitude background pattern, which progressed to frequent electrographic seizures over the left hemisphere. The interictal background EEG pattern remained grossly abnormal over the next 48 hours, showing very low background amplitudes (<10?V). Magnetic resonance imaging revealed an isolated acute left-sided thalamic infarction. This is the first description of severe global EEG suppression caused by an isolated unilateral thalamic stroke and supports the role of the thalamus as the control centre for cortical electrical activity. PMID:24410068

Kharoshankaya, Liudmila; Filan, Peter M; Bogue, Conor O; Murray, Deirdre M; Boylan, Geraldine B

2014-01-01

133

Unilateral Closed Lip Schizencephaly with Septo-Optic Dysplasia  

PubMed Central

Schizencephaly is a rare malformation of the central nervous system. Both genetic and non-genetic etiologies like prenatal infections or ischemia have been postulated. Clinical manifestations most often include varying degrees of developmental delay, motor impairment and seizures. It can be associated with septo-optic dysplasia (SOD), optic nerve hypoplasia and absence of septum pellucidum, pachygyria, polymicrogyria, heterotopia and arachnoid cysts. We report a case of unilateral closed lip schizencephaly with SOD. PMID:24761255

Bhatnagar, S; Kuber, R; Shah, D; Kulkarni, VM

2014-01-01

134

[Diagnostic problems of unilateral exophthalmos--case report].  

PubMed

This paper presents a case of a 54-year-old patient with unilateral exophthalmos. During the hospitalization basic laboratory investigations, USG, skull X-ray film, NMR of orbits were carried out. The patient was treated with systemic corticosteroids with good response. Inflammatory infiltration and venous stasis are considered to be the cause of exophthalmos. Granulomatous orbital inflammation was detected. The etiology of nonspecific orbital inflammation remains still unknown. PMID:15515323

Delong, Gabriela; Stankiewicz, Andrzej; Warczy?ska, Agnieszka

2004-01-01

135

Unilateral lumbar facet joint hypertrophy causing nerve root irritation.  

PubMed Central

We present four cases of massive unilateral lumbar facet joint hypertrophy in an otherwise morphologically normal spine. All presented with a combination of low back pain and symptoms of entrapment of a single lumbar nerve root. The abnormality is best visualised by CT scanning and the results of surgical decompression by partial undercutting facetectomy are favourable. Images fig. 1 fig. 2 fig. 3 fig. 4 PMID:3190129

Wilde, G. P.; Szypryt, E. P.; Mulholland, R. C.

1988-01-01

136

Therapeutic Effect of Retinoic Acid on Unilateral Ureteral Obstruction Model  

Microsoft Academic Search

Background: Retinoic acids, a group of natural and synthetic vitamin A derivatives, have potent anti-proliferative, anti-inflammatory and anti-fibrotic properties. We investigated the therapeutic effect of all-trans-retinoic acid (ATRA) on unilateral ureteral obstruction (UUO) model mice. Methods: First, to evaluate the prophylactic effect, we administered 0.5 mg of ATRA for 3 days before UUO (UUO ATRA). Then, to evaluate the therapeutic

Kazuya Kishimoto; Koji Kinoshita; Shoichi Hino; Tomohiro Yano; Yasuaki Nagare; Hideki Shimazu; Yuji Nozaki; Masafumi Sugiyama; Shinya Ikoma; Masanori Funauchi

2011-01-01

137

Comparison of maximal unilateral versus bilateral voluntary contraction force  

Microsoft Academic Search

The aim of the present study was to determine whether the difference in maximal voluntary contraction (MVC) forces between\\u000a unilateral (UL) and bilateral (BL) contractions could be due to a difference in the timing of MVC peak force production between\\u000a legs during BL MVC, or due to the maximal voluntary activation level (VAL) in each leg between UL and BL

Boris Matkowski; Alain Martin; Romuald Lepers

138

Unilateral hearing during development: hemispheric specificity in plastic reorganizations  

PubMed Central

The present study investigates the hemispheric contributions of neuronal reorganization following early single-sided hearing (unilateral deafness). The experiments were performed on ten cats from our colony of deaf white cats. Two were identified in early hearing screening as unilaterally congenitally deaf. The remaining eight were bilaterally congenitally deaf, unilaterally implanted at different ages with a cochlear implant. Implanted animals were chronically stimulated using a single-channel portable signal processor for two to five months. Microelectrode recordings were performed at the primary auditory cortex under stimulation at the hearing and deaf ear with bilateral cochlear implants. Local field potentials (LFPs) were compared at the cortex ipsilateral and contralateral to the hearing ear. The focus of the study was on the morphology and the onset latency of the LFPs. With respect to morphology of LFPs, pronounced hemisphere-specific effects were observed. Morphology of amplitude-normalized LFPs for stimulation of the deaf and the hearing ear was similar for responses recorded at the same hemisphere. However, when comparisons were performed between the hemispheres, the morphology was more dissimilar even though the same ear was stimulated. This demonstrates hemispheric specificity of some cortical adaptations irrespective of the ear stimulated. The results suggest a specific adaptation process at the hemisphere ipsilateral to the hearing ear, involving specific (down-regulated inhibitory) mechanisms not found in the contralateral hemisphere. Finally, onset latencies revealed that the sensitive period for the cortex ipsilateral to the hearing ear is shorter than that for the contralateral cortex. Unilateral hearing experience leads to a functionally-asymmetric brain with different neuronal reorganizations and different sensitive periods involved. PMID:24348345

Kral, Andrej; Heid, Silvia; Hubka, Peter; Tillein, Jochen

2013-01-01

139

Harlequin syndrome: the sudden onset of unilateral flushing and sweating.  

PubMed Central

Facial flushing and sweating were investigated in five patients who complained of the sudden onset of unilateral facial flushing in hot weather or when exercising vigorously. One patient probably suffered a brainstem infarct at the time that the unilateral flush was first noticed, and was left with a subtle Horner's syndrome on the side opposite to the flush. The other four had no other neurological symptoms and no ocular signs of Horner's syndrome. Thermal and emotional flushing and sweating were found to be impaired on the non-flushing side of the forehead in all five patients whereas gustatory sweating and flushing were increased on that side in four of the five patients, a combination of signs indicating a deficit of the second sympathetic neuron at the level of the third thoracic segment. CT and MRI of this area failed to disclose a structural lesion but latency from stimulation of the motor cortex and thoracic spinal cord to the third intercostal muscle was delayed on the non-flushing side in one patient. The complaint of unilateral flushing and sweating was abolished in one patient by ipsilateral stellate ganglionectomy. The unilateral facial flushing and sweating induced by heat in all five patients was thus a normal or excessive response by an intact sympathetic pathway, the other side failing to respond because of a sympathetic deficit. The onset in the four cases of peripheral origin followed strenuous exertion, which suggested that an anterior radicular artery may have become occluded at the third thoracic segment during torsion of the thoracic spine. Images PMID:3155385

Lance, J W; Drummond, P D; Gandevia, S C; Morris, J G

1988-01-01

140

Severe Personality Changes after Unilateral Left Paramedian Thalamic Infarct  

Microsoft Academic Search

Personality changes are not uncommon after paramedian thalamic infarction, but usually bilateral or relatively large lesions, often complicated by other neurological or neuropsychological deficits, are present. ‘Pure’ cases of unilateral lesions are extremely rare. We report that a right-handed, 48-year-old man, who was hypertensive and diabetic but had no prior psychiatric history, developed severe personality changes and a frontal-like syndrome

Toshio Fukutake; Koichi Akada; Shoichi Ito; Tomoko Okuda; Yoshihiro Ueki

2002-01-01

141

Pars Stress Fracture (Lumbar Spondylolysis)  

MedlinePLUS

... Neck and Back) > Pars Stress Fracture Pars Stress Fracture Page Content Pars stress fractures occur in young athletes involved in repetitive bending ... an episode of low back pain Pars stress fracture, also called lumbar spondylolysis, is one of the ...

142

Distal Radius Fracture (Broken Wrist)  

MedlinePLUS

... the distal radius can break include: • Intra-articular fracture. A fracture that extends into the wrist joint. (“Articular” means “joint.”) • Extra-articular fracture. A fracture that does not extend into the ...

143

JAMA Patient Page: Bone Fractures  

MedlinePLUS

Ring Fixator With Pins and Wires Intramedullary Nail Cast Internal Fixation External Fixation Simple Fracture, Displaced Comminuted Fracture Simple Fracture, Undisplaced Long-Leg Plaster Cast Types of Treatment for Bone Fractures B O ...

144

High velocity impact fracture  

E-print Network

An in-depth understanding of dynamic ductile fracture is one of the most important steps to improve the survivability of critical structures such as the lost Twin Towers. In the present thesis, the macroscopic fracture ...

Teng, Xiaoqing

2005-01-01

145

Infant skull fracture (image)  

MedlinePLUS

Skull fractures may occur with head injuries. Although the skull is both tough and resilient and provides excellent protection ... a severe impact or blow can result in fracture of the skull and may be accompanied by ...

146

Vertebral Compression Fractures  

MedlinePLUS

Living with OI: Information on Vertebral Compression Fractures Compression fractures are a common, painful problem for children and adults who have OI. This occurs when an injury causes the spinal bone ...

147

Nasal fracture (image)  

MedlinePLUS

A nasal fracture is a break in the bone over the ridge of the nose. It usually results from a blunt ... and is one of the most common facial fracture. Symptoms of a broken nose include pain, blood ...

148

Femur fracture repair - discharge  

MedlinePLUS

You had a fracture (break) in the femur, also called the thigh bone, in your leg. You may have needed surgery to repair ... surgeon will make a cut to open your fracture. Your surgeon will then use special metal devices ...

149

Growth Plate Fractures  

MedlinePLUS

... fracture will not need to stay in a cast for as long as an adult fracture would ... disrupted bone growth. • Many can be treated with cast immobilization but surgical treatment may be necessary. If ...

150

Sprains, Strains and Fractures  

MedlinePLUS

... fractures. Many fractures and sprains occur during sports. Football players are particularly vulnerable to foot and ankle ... feet and ankles and take a complete medical history. He or she will also order tests, including ...

151

Fracture of synthetic diamond  

Microsoft Academic Search

The fracture behavior of synthetic diamond has been investigated using indentation methods and by the tensile testing of pre-notched fracture-mechanics type samples. Specifically, the fracture toughness of free-standing diamond plates, grown by chemically-vapor deposited (CVD) methods, was measured using Vickers indentations and by the use of disk-shaped compact-tension specimens; the latter method provides an evaluation of the through-thickness fracture properties,

M. D. Drory; R. H. Dauskardt; A. Kant; R. O. Ritchie

1995-01-01

152

Hydraulic fracture design optimization  

SciTech Connect

This research and development investigation, sponsored by US DOE and the oil and gas industry, extends previously developed hydraulic fracture geometry models and applied energy related characteristic time concepts towards the optimal design and control of hydraulic fracture geometries. The primary objective of this program is to develop rational criteria, by examining the associated energy rate components during the hydraulic fracture evolution, for the formulation of stimulation treatment design along with real-time fracture configuration interpretation and control.

Lee, Tae-Soo; Advani, S.H.

1992-01-01

153

Hydraulic fracture design optimization  

SciTech Connect

This research and development investigation, sponsored by US DOE and the oil and gas industry, extends previously developed hydraulic fracture geometry models and applied energy related characteristic time concepts towards the optimal design and control of hydraulic fracture geometries. The primary objective of this program is to develop rational criteria, by examining the associated energy rate components during the hydraulic fracture evolution, for the formulation of stimulation treatment design along with real-time fracture configuration interpretation and control.

Lee, Tae-Soo; Advani, S.H.

1992-06-01

154

Fractures of the Pelvis  

Microsoft Academic Search

\\u000a Pelvic fractures are uncommon in children [1]. They account for only 1–2% of fractures seen by paediatric orthopaedic surgeons\\u000a [2]. Their rarity is due to the greater volume of cartilage which provides a buffer for energy absorption. Case reports of\\u000a pelvic fractures in early childhood are infrequent. Usually fractures of the pelvis are seen in polytraumatized children who\\u000a have been

Peter W. Engelhardt

155

Epidemiology of Osteoporotic Fractures  

Microsoft Academic Search

Osteoporosis constitutes a major public health problem through its association with age-related fractures. These fractures typically occur at the hip, spine and distal forearm. It has been estimated that the lifetime risk of a hip fracture in white women is 17.5%, with a comparable risk in men of 6%. Hip fractures lead to an overall reduction in survival of about

Elaine Dennison; Cyrus Cooper

2000-01-01

156

Fracture Education in Engineering.  

ERIC Educational Resources Information Center

Fracture mechanics is a multidisciplinary topic which is being introduced to undergraduate engineering students in such courses as materials engineering. At a recent Conference on Fracture held at the University of Waterloo, a session was devoted to fracture education. Some of the ideas presented at that session are included and discussed here.…

Sidey, D.; And Others

157

Relative Permeability Through Fractures  

E-print Network

SGP-TR-170 Relative Permeability Through Fractures Gracel P. Diomampo August 2001 Financial support, California #12;#12;v Abstract The mechanism of two-phase flow through fractures is of importance in understanding many geologic processes. Currently, two-phase flow through fractures is still poorly understood

Stanford University

158

OSTEOPOROTIC FRACTURES ghouling facts  

E-print Network

10/20/2011 1 OSTEOPOROTIC FRACTURES ghouling facts Maureen Benetti NP OSTEOPOROSIS � "Osteo" means architecture normal osteoporotic OSTEOPOROSIS � Leads to fragile bone and an increased risk of fracture #12;10/20/2011 2 OSTEOPOROSIS � Asymptomatic � Most common metabolic bone disease in the developed world � Fracture

Squire, Larry R.

159

Fracture of Bone  

Microsoft Academic Search

Fracture of bone is investigated by measuring the energy required to propagate a crack and by observing, microscopically, the mechanism of fracture. At low strain rates bone displays very high resistance to crack propagation comparable even to some metallic materials. The type of fracture is similar to fiber-reinforced composite materials.

K. Piekarski

1970-01-01

160

Proximal Humerus Fractures  

Microsoft Academic Search

Background: The purpose of this prospective study was to assess the short- and long-term outcome of proximal humerus fractures treated according to a standardized regime. Patients and Methods: 99 patients with fractures of the proximal humerus were included. Scapular antero-posterior and lateral radiographs were used to classify the fracture type with the Neer classification system. Treatment was nonoperative and included

Marie-Jeanne T. F. D. Vrancken Peeters; Gerard Willem Kastelein; Paul John Breslau

2001-01-01

161

Posterior pelvic ring fractures: Closed reduction and percutaneous CT-guided sacroiliac screw fixation  

Microsoft Academic Search

Purpose  To assess the midterm results of closed reduction and percutaneous fixation (CRPF) with computed tomography (CT)-guided sacroiliac\\u000a screw fixation in longitudinal posterior pelvic ring fractures.\\u000a \\u000a \\u000a \\u000a Methods  Thirteen patients with 15 fractures were treated. Eleven patients received a unilateral, two a bilateral, screw fixation.\\u000a Twenty-seven screws were implanted. Continuous on-table traction was used in six cases. Mean radiological follow-up was 13\\u000a months.

Augustinus Ludwig Jacob; Peter Messmer; Klaus-Wilhelm Stock; Norbert Suhm; Bernard Baumann; Pietro Regazzoni; Wolfgang Steinbrich

1997-01-01

162

Proximal humerus fractures.  

PubMed

Proximal humerus fractures are among the most common fractures associated with osteoporosis. With an aging population, incidence of these fractures will only increase. The proximal humerus not only forms the lateral portion of the shoulder articulation but also has significant associations with musculoskeletal and neurovascular structures. As a result, fractures of the proximal humerus can significantly impact not only the function of the shoulder joint, but the health and function of the entire upper extremity as well. Understanding of these fractures, the management options, and associated nursing care, can help reduce morbidity rate and improve functional outcomes. PMID:24022417

Price, Matthew C; Horn, Pamela L; Latshaw, James C

2013-01-01

163

The fractured femur.  

PubMed

The femur is the largest and strongest bone in the human body, and great force is necessary to fracture it. In adults, the most common cause of femur fracture is motor vehicle accidents. In children, abuse is often the cause. And in the elderly, femur fractures most often occur from falling. Radiography is the gold standard for diagnostic imaging of femurs, but diagnosis can be complicated with nondisplaced or occult fractures. Particularly in the emergency setting, modalities such as magnetic resonance imaging or computed tomography may be necessary. Effective treatment of femur fractures is needed to restore homeostatic function and prevent complications. PMID:23322864

Reynolds, April

2013-01-01

164

Surgical treatment of hip fractures: factors influencing mortality  

PubMed Central

Background: Data for osteoporotic hip fractures in Greece is limited and little is known upon the meaning of family support during the postoperative/rehabilitation period. Objective: To identify the factors influencing the mortality after hip fractures in the elderly, the effect of rehabilitation and family support in the post-fracture course, and the impact of these fractures on the family of the injured elderly. Methods: We conducted an observational study of 218 consecutive patients older than 60 years of age, who underwent surgical management of a unilateral hip fracture at a tertiary hospital of Central Greece, with follow-up contacts at 30 days, 3 months and one year. Demographic characteristics, pre- and post-fracture residential and functional status, assessment of basic activities of daily living (ADL), co-morbidities, type and mechanism of fracture and hospitalization data as well as the modification of activities of the patients’ relatives were recorded. Results: Fifteen patients (6.9%) died during hospitalization; thirty-nine (17.9%) died within one year of fracture. The factors that were predictive of in-hospital, 30-days and one-year mortality, based on multivariate analysis, were male sex, advanced age >85 and Charson index >3. There was a significant association between delayed surgery (>48 hours) and increased in-hospital mortality. The percentage of patients assessed as ADL A or B at baseline, decreased form 84% preoperatively to 50.4% one year postoperatively. Only one-third of patients walking without aid before the fracture returned to the previous state. Family members modified their activities in 48% of cases to assist their relatives with a hip fracture. Conclusions: One-year mortality in patients with hip fractures was 17.9%. Surgical delay (>48 hours) increased in-hospital mortality. Comorbidities >3, male sex, and advanced age increased the risk of in-hospital and post-discharge mortality during the 1st year. Twelve months postoperatively, half of patients walking without aid before the fracture returned to the previous state. Despite the beneficial effect of family support, the lack of organized rehabilitation programs and geriatric units are potential negative factors for patients’ functional outcome. In addition, 48% of patients’ relatives changed their daily activities to assist their relatives. PMID:24470737

Dailiana, Z; Papakostidou, I; Varitimidis, S; Michalitsis, SG; Veloni, A; Malizos, KN

2013-01-01

165

Atraumatic sternum fracture.  

PubMed

The spine, pelvic bones and long bones of the lower extremities are common sites for insufficiency fractures. Cases of sternum insufficiency fractures have rarely been reported among elderly patients. Insufficiency fractures tend to occur in bones with decreased mechanical strength especially among elderly patients, in postmenopausal women and patients with underlying diseases. We describe a case of spontaneous sternum insufficiency fracture in a healthy man, with no known risk factors to fracture, or previous history of fractures. Sternum insufficiency fracture is a rare cause of chest pain. This case serves to remind the emergency physician to remain vigilant for other non-cardiac, non-pulmonary and non-traumatic causes of chest pain, especially among patients with known risk factors such as osteoporosis, chronic obstructive pulmonary disease, rheumatoid arthritis, systemic lupus erythematosus and patients on long-term steroid treatment. If diagnosed correctly, these patients can be discharged and treated as outpatients as this case emphasises. PMID:25326566

Abrahamsen, Sebastian Ørskov; Madsen, Christina Friis

2014-01-01

166

[Unilateral laryngeal nerve paralysis in the adult: Epidemiology, symptoms, physiopathology and treatment].  

PubMed

In France, the main causes for unilateral laryngeal nerve paralysis in the adult patient are surgery and malignant tumors. Most of unilateral laryngeal nerve paralysis following thyroid surgery will recover within the first six postoperative months. At the time of unilateral laryngeal nerve paralysis, swallowing impairment and dyspnea occur in around 30% and 5% of cases, respectively. In the face of a unilateral laryngeal nerve paralysis occurring without a history of trauma of surgery, the main paraclinical examination to perform is a computed laryngeal nerve examination analyzing the whole length of the nerve involved. Speech therapy efficiency is related to the degree of severity of the symptoms related to unilateral laryngeal nerve paralysis. In the vast majority of cases, laryngeal medialization approaches improve dysphonia and swallowing impairment related to unilateral laryngeal paralysis, but not dyspnea. PMID:24525308

Laccourreye, Ollivier; Malinvaud, David; Ménard, Madeleine; Bonfils, Pierre

2014-04-01

167

Lateral specificity in resistance training: the effect of bilateral and unilateral training  

Microsoft Academic Search

Maximal voluntary strength of simultaneous bilateral exertion has been shown to be small compared to the sum of the unilateral\\u000a exertions. Three experiments were conducted to determine the effects of bilateral and unilateral resistance training on this\\u000a bilateral deficit and to compare these in hands, arms, and legs. In each experiment, the subjects were divided into three\\u000a groups: unilateral training

Yuko Taniguchi

1997-01-01

168

Unilateral Radiotherapy for the Treatment of Tonsil Cancer  

SciTech Connect

Purpose: To assess, through a retrospective review, clinical outcomes of patients with squamous cell carcinoma of the tonsil treated at the M. D. Anderson Cancer Center with unilateral radiotherapy techniques that irradiate the involved tonsil region and ipsilateral neck only. Methods and Materials: Of 901 patients with newly diagnosed squamous cell carcinoma of the tonsil treated with radiotherapy at our institution, we identified 102 that were treated using unilateral radiotherapy techniques. All patients had their primary site of disease restricted to the tonsillar fossa or anterior pillar, with <1 cm involvement of the soft palate. Patients had TX (n = 17 patients), T1 (n = 52), or T2 (n = 33) disease, with Nx (n = 3), N0 (n = 33), N1 (n = 23), N2a (n = 21), or N2b (n = 22) neck disease. Results: Sixty-one patients (60%) underwent diagnostic tonsillectomy before radiotherapy. Twenty-seven patients (26%) underwent excision of a cervical lymph node or neck dissection before radiotherapy. Median follow-up for surviving patients was 38 months. Locoregional control at the primary site and ipsilateral neck was 100%. Two patients experienced contralateral nodal recurrence (2%). The 5-year overall survival and disease-free survival rates were 95% and 96%, respectively. The 5-year freedom from contralateral nodal recurrence rate was 96%. Nine patients required feeding tubes during therapy. Of the 2 patients with contralateral recurrence, 1 experienced an isolated neck recurrence and was salvaged with contralateral neck dissection only and remains alive and free of disease. The other patient presented with a contralateral base of tongue tumor and involved cervical lymph node, which may have represented a second primary tumor, and died of disease. Conclusions: Unilateral radiotherapy for patients with TX-T2, N0-N2b primary tonsil carcinoma results in high rates of disease control, with low rates of contralateral nodal failure and a low incidence of acute toxicity requiring gastrostomy.

Chronowski, Gregory M., E-mail: gchronowski@mdanderson.org [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Garden, Adam S.; Morrison, William H.; Frank, Steven J. [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Schwartz, David L. [Department of Radiation Medicine, Long Island Jewish Hospital (United States); Shah, Shalin J.; Beadle, Beth M.; Gunn, G. Brandon [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Kupferman, Michael E. [Department of Head and Neck Surgery, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States); Ang, Kian K.; Rosenthal, David I. [Department of Radiation Oncology, University of Texas M. D. Anderson Cancer Center, Houston, TX (United States)

2012-05-01

169

Autologous bone plugs in unilateral total knee arthroplasty  

PubMed Central

Background: The purpose of this study was to compare blood loss, declines in hemoglobin (HgB) and hematocrit (HcT) levels, and required homologous transfusions for patients who either had the femoral intramedullary defect left open or filled with an autologous bone plug during total knee arthroplasty (TKA). We hereby present our results of autologous bone plugs in unilateral TKA. Materials and Methods: A retrospective chart review was performed on 55 patients diagnosed with osteoarthritis (OA) who had undergone unilateral TKA. Twenty six patients had the femoral defect filled with an autologous bone plug and 29 did not. Lateral releases and patella replacements were not performed. Drained blood was reinfused when appropriate. Results: Mean blood loss and mean blood reinfused were similar for the plugged (loss: 960.8 ± 417.3 ml; reinfused: 466.7 ± 435.9 mL) and unplugged groups (loss: 1065.9 ± 633.5 ml, P = 0.38; reinfused: 528.4 ± 464.8 ml, P = 0.61). Preoperative HgB (14.3 ± 1.4 g/dL, P = 0.93) and HcT levels (42.2 ± 4.6%, P = 0.85) were similar across plug conditions. HgB and HcT levels declined similarly for the plugged (2.7 ± 1.2 g/dl and 7.9 ± 4.0%) and unplugged groups (3.0 ± 0.9 g/dl, P = 0.16 and 9.0 ± 2.6%, P = 0.16), respectively. Of patients, one in the plugged group and none in the unplugged group required homologous transfusions (P = 0.5). Conclusion: The autologous bone plug does not appear to reduce the need for homologous blood transfusions following unilateral TKA. PMID:23682181

Protzman, Nicole M; Buck, Nicholas J; Weiss, Carl B

2013-01-01

170

A study of mandibular fractures over a 5-year period of time: A retrospective study  

PubMed Central

Objective: This study aims to evaluate and compare with the existing literature on the etiology, pattern, gender, and anatomical distribution of mandibular fractures. Materials and Methods: The data of 225 cases were analyzed over a period of 5 years between March 2009 and November 2013. Of this 110 were unilateral, 23 bilateral, 18 symphysis and 74 multiple fractures. Results: Males are more affected than females. The peak incidence rate is occurring in 30-35 years of age group. The most common fracture site is parasymphysis and least common site is ramus of mandible. The most common etiological factor is road traffic accident (RTA) (45.3%) followed by falls (42.6%), assaults (8.9%), sport injuries (2.2%), and gunshot wounds (0.89%). Conclusion: Thus, we conclude that RTA is the leading cause of mandibular fractures and males are more affected. The most common site is parasymphysis fracture in association with angle fracture. We observed that gender was significantly associated with body and angle fracture (P = 0.04) and significant relationship between etiology with multiple site fracture such as (parasymphysis-angle), (body-condyle), (body-angle), and (symphysis-condyle) was observed (P ? 0.05).

Vyas, Ashish; Mazumdar, Utpal; Khan, Firoz; Mehra, Madhura; Parihar, Laveena; Purohit, Chandni

2014-01-01

171

Cerebellar dysplasia and unilateral cataract in Marinesco-Sjögren syndrome.  

PubMed

The classic features of Marinesco-Sjögren syndrome include bilateral cataracts, cerebellar ataxia, and mental deficiency with an autosomal recessive inheritance pattern. Weakness and a variety of other characteristics are present inconsistently. A limited number of neuroimaging studies have indicated that cerebellar hypoplasia is the most common finding. We report a patient with near normal intelligence, unilateral cataract, and the previously unreported magnetic resonance imaging findings of cerebellar dysplasia, arachnoid cyst, and absent septum pellucidum. A review of the literature suggests significant heterogeneity in the Marinesco-Sjögren syndrome. PMID:8703231

Williams, T E; Buchhalter, J R; Sussman, M D

1996-02-01

172

Renoprotective effects of telmisartan after unilateral renal ablation in rats  

PubMed Central

Purpose The renoprotective function of the angiotensin II type 1 receptor blocker (ARB) is well-known in various studies, including the animal model of renal failure. However, detailed temporal changes of pathological and molecular findings after unilateral nephrectomy are not fully understood. The main purpose of this study was to clarify the renoprotective effects and pathological changes induced by the ARB in rat-remnant kidney (RK) tissues after unilateral nephrectomy, but not after a 5/6 nephrectomy. Methods Telmisartan, which is structurally and functionally unique among ARB, was used in this study. Three rat groups were examined: A) no ARB administrated (RK, n=21); B) continuous subcutaneous infusion of an ARB administrated (RK-ARB, n=21); and C) a sham-operated group (Sham). Renal function was evaluated by blood urea nitrogen (BUN) levels and creatinine clearance (Ccr). Fibrosis was evaluated by hydroxyproline levels and Masson’s trichrome staining. Expressions of angiotensin II type 1 receptor (AT1R) and transforming growth factor beta (TGF-?) were investigated by real-time polymerase chain reaction and Western blotting. Results There was no significant difference regarding body and kidney weight or pathological features evaluated by hematoxylin and eosin staining between the RK and RK-ARB groups. The Ccr in the RK group was significantly lower than that in the Sham group (P<0.01), but no significant difference was found between the RK-ARB and Sham groups. The fibrotic area increased significantly with time after nephrectomy in the RK group. Although a similar trend was found in the RK-ARB group, the percentage of fibrous area in the RK-ARB group was significantly lower than that in the RK group at each time point (P<0.01). AT1R mRNA levels in the RK group were regulated immediately compared with those in the RK-ARB group. Although expressions of the AT1R and TGF-? were significantly higher in the RK-ARB group than in the Sham group, no significant differences were found between the RK-ARB and Sham group. Conclusion The ARB had renoprotective effects after unilateral nephrectomy. The ARB effectively maintained Ccr. Our results also showed the possibility that fibrotic changes mediated by AT1R and TGF-? play an important role in renal protection. Moreover, this is the first report on changes of AT1R expression after using the ARB telmisartan in kidney tissues after unilateral nephrectomy. Finally, our results suggest that ARB may be useful to prevent renal failure in patients treated with nephrectomy. PMID:24143119

Matsuo, Tomohiro; Miyata, Yasuyoshi; Sagara, Yuji; Higami, Yoshikazu; Tobu, Shohei; Matsuo, Manabu; Noguchi, Mitsuru; Shimokawa, Isao; Kanetake, Hiroshi; Sakai, Hideki

2013-01-01

173

Isolated Unilateral Hypoglossal Nerve Palsy Due to Vertebral Artery Dissection  

PubMed Central

We report the case of a patient with unilateral tongue weakness secondary to an isolated lower motor neuron hypoglossal nerve palsy that was caused by a right vertebral artery dissection in the lower neck. The patient had a boggy tongue with a deviation to the right side but an otherwise normal neurological examination. Magnetic resonance angiography showed a narrow lumen of the right vertebral artery in the neck. After initially treating the patient with aspirin in the emergency room and later with warfarin for three months, there was complete recanalization of the right vertebral artery. Only one other case of vertebral artery dissection and twelfth nerve palsy has been reported before. PMID:22031481

Mahadevappa, Karthik; Chacko, Thomas; Nair, Anil K.

2012-01-01

174

Unilateral conjunctival ulcer due to Stenotrophomonas maltophilia infection  

PubMed Central

We report a case of unilateral conjunctival ulcer due to Stenotrophomonas maltophilia infection in an immunocompetent individual. A 44-year-old male presented with complaints of pain and yellowish discharge in the right eye for one week. Patient underwent complete ophthalmic evaluation and relevant laboratory investigations. Anterior segment examination revealed localized conjunctival and episcleral congestion with conjunctival ulceration on the bulbar conjunctiva in the right eye. Gram's stain revealed gram-negative bacilli. Culture and sensitivity revealed S. maltophilia and responded well to topical moxifloxacin with systemic co-trimoxazole therapy. PMID:22446910

Mahendradas, Padmamalini; Avadhani, Kavitha; Anandula, Venkatramana; Shetty, Rohit

2012-01-01

175

Fractures after antiretroviral initiation  

PubMed Central

Background Bone mineral density declines by 2–6% within 1–2 years after initiation of antiretroviral therapy (ART); however, it is uncertain whether this results in an immediate or cumulative increase in fracture rates. Methods We evaluated the incidence and predictors of fracture in 4640 HIV-positive participants from 26 randomized ART studies followed in the AIDS Clinical Trials Group (ACTG) Longitudinal-Linked Randomized Trial study for a median of 5 years. Fragility and nonfragility fractures were recorded prospectively at semiannual visits. Incidence was calculated as fractures/total person-years. Cox proportional hazards models evaluated effects of traditional fracture risks, HIV disease characteristics, and ART exposure on fracture incidence. Results Median (interquartile range) age was 39 (33, 45) years; 83% were men, 48% white, and median nadir CD4 cell count was 187 (65, 308) cells/?l. Overall, 116 fractures were reported in 106 participants with median time-to-first fracture of 2.3 years. Fracture incidence was 0.40 of 100 person-years among all participants and 0.38 of 100 person-years among 3398 participants who were ART naive at enrollment into ACTG parent studies. Among ART-naive participants, fracture rates were higher within the first 2 years after ART initiation (0.53/100 person-years) than subsequent years (0.30/100 person-years). In a multivariate analysis of ART-naive participants, increased hazard of fracture was associated with current smoking and glucocorticoid use but not with exposure to specific antiretrovirals. Conclusion Fracture rates were higher within the first 2 years after ART initiation, relative to subsequent years. However, continuation of ART was not associated with increasing fracture rates in these relatively young HIV-positive individuals. PMID:22951635

Yin, Michael T.; Kendall, Michelle A.; Wu, Xingye; Tassiopoulos, Katherine; Hochberg, Marc; Huang, Jeannie S.; Glesby, Marshall J.; Bolivar, Hector; McComsey, Grace A.

2013-01-01

176

Dementia and Hip Fractures  

PubMed Central

Dementia and hip fractures are 2 conditions that are seen primarily in older adults, and both are associated with substantial morbidity and mortality. An individual with dementia is up to 3 times more likely than a cognitively intact older adult to sustain a hip fracture. This may occur via several mechanisms, including (1) risk factors that are common to both outcomes; (2) the presence of dementia increasing hip fracture incidence via intermediate risk factors, such as falls, osteoporosis, and vitamin D; and (3) treatment of dementia causing side effects that increase hip fracture risk. We describe a model that applies these 3 mechanisms to explain the relationship between dementia and hip fractures. Comprehensive understanding of these pathways and their relative influence on the outcome of hip fracture will guide the development of effective interventions and potentially improve prevention efforts. PMID:23569663

Friedman, Susan M.; Menzies, Isaura B.; Bukata, Susan V.; Mendelson, Daniel A.; Kates, Stephen L.

2010-01-01

177

Management of Penile Fracture  

PubMed Central

Objectives To study clinical features and treatment of patients diagnosed with fractured penis. Methods All patients diagnosed with penis fracture from March 2000-March 2007 were retrospectively studied. No invasive investigation was used for diagnosis. Results Surgical intervention was done in 52 patients while 5 patients were managed conservatively. The constant finding recorded in all cases was that penis fracture occurred in erect penises. Most fractures were observed in the 16-30 years age group (50.88%). Left lateral tear was present in 53.84% cases. One patient had gangrene of penile skin after surgery. Conclusion Penis Fracture is not so uncommon as reported. A trauma to erect penis is mandatory for fracture to occur. Surgical intervention is the preferred mode of treatment. PMID:22359706

Wani, Imtiaz

2008-01-01

178

Efficacy of Progesterone following a Moderate Unilateral Cortical Contusion Injury  

PubMed Central

Abstract Traumatic brain injury (TBI) results in an accumulation of edema and loss of brain tissue. Progesterone (PROG) has been reported to reduce edema and cortical tissue loss in a bilateral prefrontal cortex injury. This study tests the hypothesis that PROG is neuroprotective following a unilateral parietal cortical contusion injury (CCI). Adult male Sprague-Dawley rats were subjected to a moderate unilateral TBI using the CCI model. Rats were given 8?mg/kg PROG 15?min post-injury with four subsequent injections (6?h, and days 1, 2, and 3). Edema was determined 3 days post-injury, while cortical tissue sparing was also evaluated at 7 days post-injury. Animals were injured and given one of four treatments: (I) vehicle; (II) low dose: 8?mg/kg PROG; (III) high dose: 16?mg/kg PROG; (IV) tapered: 8?mg/kg PROG. Animals were given an initial injection within 15?min, followed by five injections (6?h, and days 1, 2, 3, and 4). Group IV received two additional injections (4?mg/kg on day 5; 2?mg/kg on day 6). PROG failed to alter both cortical edema and tissue sparing at any dose. Failure to modify two major sequelae associated with TBI brings into question the clinical usefulness of PROG as an effective treatment for all types of brain injury. PMID:18476780

Gilmer, Lesley K.; Roberts, Kelly N.

2008-01-01

179

Unilateral exposure of Shaker B potassium channels to hyperosmolar solutions.  

PubMed Central

This study tests the hypothesis that ion channels will be affected differently by external (extracellular) versus internal (cytoplasmic) exposure to hyperosmolar media. We looked first for effects on inactivation kinetics in wild-type Shaker B potassium channels. Although external hyperosmolar exposure did not alter the inactivation rate, internal exposure slowed both onset and recovery from fast inactivation. Differential effects on activation kinetics were then characterized by using a noninactivating Shaker B mutant. External hyperosmolar exposure slowed the late rising phase of macroscopic current without affecting the initial delay or early rising phase kinetics. By contrast, internal exposure slowed the initial steps in channel activation with only minimal changes in the later part of the rising phase. Neither external nor internal hyperosmolar exposure affected tail current rates in these noninactivating channels. Additionally, suppression of peak macroscopic current was approximately twofold smaller during external, as compared with internal, hyperosmolar exposure. Single-channel currents, observed under identical experimental conditions, showed a differential suppression equivalent to that seen in macroscopic currents. Apparently, during unilateral hyperosmolar exposure, changes in macroscopic peak current arise primarily from changes in single-channel conductance rather than from changes in equilibrium channel gating. We conclude that unilateral hyperosmolar exposure can provide information concerning the potential structural localization of functional components within ion-channel molecules. Images FIGURE 10 PMID:8519986

Starkus, J G; Schlief, T; Rayner, M D; Heinemann, S H

1995-01-01

180

Gamma knife stereotactic radiosurgery for unilateral acoustic neuromas  

PubMed Central

Objective:To evaluate the clinical results achievable using current techniques of gamma knife stereotactic radiosurgery to treat sporadic unilateral acoustic neuromas. Methods:A retrospective review of 234 consecutive patients treated for unilateral acoustic neuromas between 1996 and 1999, with a mean (SD) follow up of 35 (16) months. Tumour control was assessed with serial radiological imaging and by the need for surgical intervention. Hearing preservation was assessed using Gardner-Robertson grades. Details of complications including cranial neuropathies and non-specific vestibulo-cochlear symptoms are included. Results:A tumour control rate in excess of 92% was achieved, with only 3% of patients undergoing surgery after radiosurgery. Results were less good for larger tumours, but control rates of 75% were achieved for 35–45 mm diameter lesions. Of patients with discernible hearing, Gardner-Robertson grades were unchanged in 75%. Facial nerve function was adversely affected in 4.5%, but fewer than 1% of patients had persistent weakness. Trigeminal symptoms improved in 3%, but developed in 5% of patients, being persistent in less than 1.5%. Transient non-specific vestibulo-cochlear symptoms were reported by 13% of patients. Conclusions:Tumour control rates, while difficult to define, are comparable after radiosurgery with those experienced after surgery. The complications and morbidity after radiosurgery are far less frequent than those encountered after surgery. This, combined with its minimally invasive nature, may make radiosurgery increasingly the treatment of choice for small and medium sized acoustic neuromas. PMID:14617712

Rowe, J; Radatz, M; Walton, L; Hampshire, A; Seaman, S; Kemeny, A

2003-01-01

181

Postural pattern recognition in children with unilateral cerebral palsy  

PubMed Central

Background Several different strategies for maintaining upright standing posture in children with cerebral palsy (CP) were observed. Purpose The purpose of the present study was to define two different postural patterns in children with unilateral CP, using moiré topography (MT) parameters. Additionally, another focus of this article was to outline some implications for managing physiotherapy in children with hemiplegia. Patients and methods The study included 45 outpatients with unilateral CP. MT examinations were performed using a CQ Elektronik System device. In addition, a weight distribution analysis on the base of support between unaffected and affected body sides was performed simultaneously. A force plate pressure distribution measurement system (PDM-S) with Foot Print software was used for these measurements. Results The cluster analysis revealed four groups: cluster 1 (n=19; 42.22%); cluster 2 (n=7; 15.56%); cluster 3 (n=9; 20.00%); and cluster 4 (n=10; 22.22%). Conclusion Based on the MT parameters (extracted using a data reduction technique), two postural patterns were described: 1) the pro-gravitational postural pattern; and 2) the anti-gravitational pattern. PMID:24600228

Domagalska-Szopa, Malgorzata; Szopa, Andrzej

2014-01-01

182

Kane Fracture Zone  

Microsoft Academic Search

The Kane Fracture Zone probably is better covered by geophysical survey data, acquired both by design and incidentally, than\\u000a any other fracture zone in the North Atlantic Ocean. We have used this data to map the basement morphology of the fracture\\u000a zone and the adjacent crust for nearly 5700 km, from near Cape Hatteras to the middle of the Mesozoic

Brian E. Tucholke; Hans Schouten

1988-01-01

183

Pathological fractures in children  

PubMed Central

Pathological fractures in children can occur as a result of a variety of conditions, ranging from metabolic diseases and infection to tumours. Fractures through benign and malignant bone tumours should be recognised and managed appropriately by the treating orthopaedic surgeon. The most common benign bone tumours that cause pathological fractures in children are unicameral bone cysts, aneurysmal bone cysts, non-ossifying fibromas and fibrous dysplasia. Although pathological fractures through a primary bone malignancy are rare, these should be recognised quickly in order to achieve better outcomes. A thorough history, physical examination and review of plain radiographs are crucial to determine the cause and guide treatment. In most benign cases the fracture will heal and the lesion can be addressed at the time of the fracture, or after the fracture is healed. A step-wise and multidisciplinary approach is necessary in caring for paediatric patients with malignancies. Pathological fractures do not have to be treated by amputation; these fractures can heal and limb salvage can be performed when indicated. PMID:23610658

De Mattos, C. B. R.; Binitie, O.; Dormans, J. P.

2012-01-01

184

Bracing for thoracolumbar fractures.  

PubMed

Traumatic fractures of the thoracolumbar spine are relatively common occurrences that can be a source of pain and disability. Similarly, osteoporotic vertebral fractures are also frequent events and represent a significant health issue specific to the elderly. Neurologically intact patients with traumatic thoracolumbar fractures can commonly be treated nonoperatively with bracing. Nonoperative treatment is not suitable for patients with neurological deficits or highly unstable fractures. The role of operative versus nonoperative treatment of burst fractures is controversial, with high-quality evidence supporting both options. Osteoporotic vertebral fractures can be managed with bracing or vertebral augmentation in most cases. There is, however, a lack of high-quality evidence comparing operative versus nonoperative fractures in this population. Bracing is a low-risk, cost-effective method to treat certain thoracolumbar fractures and offers efficacy equivalent to that of surgical management in many cases. The evidence for bracing of osteoporotic-type fractures is less clear, and further investigation will be necessary to delineate its optimal role. PMID:24981902

Chang, Victor; Holly, Langston T

2014-07-01

185

Hyoid fracture and strangulation.  

PubMed

Observation of hyoid fracture in skeletonized remains offers potentially valuable information on the history of the skeleton or evidence of foul play, or both. Perimortem hyoid fracture frequently indicates manual strangulation, although ligature strangulation, hanging, and other forms of trauma to the neck cannot be ruled out without additional evidence. Such fractures are rare in children and infants, since the hyoid components are not fully ossified and are more flexible than in adults. Both antemortem and postmortem origins of the fractures must also be considered. PMID:1402747

Ubelaker, D H

1992-09-01

186

Fracture characterization from attenuation of Stoneley waves across a fracture  

E-print Network

Fractures contribute significantly to the permeability of a formation. It is important to understand the fracture distribution and fluid transmissivity. Though traditional well logs can image fractures intersecting the ...

Bakku, Sudhish Kumar

2012-01-01

187

Simulation of Hydraulic Fractures and their Interactions with Natural Fractures  

E-print Network

Modeling the stimulated reservoir volume during hydraulic fracturing is important to geothermal and petroleum reservoir stimulation. The interaction between a hydraulic fracture and pre-existing natural fractures exerts significant control...

Sesetty, Varahanaresh

2012-10-19

188

Orbital Wall Restoring Surgery in Pure Blowout Fractures  

PubMed Central

Background Restoring orbital volume in large blowout fractures is still a technically challenge to the orbital surgeon. In this study, we restored the orbital wall using the combination of transorbital and transnasal approach with additional supports from the paranasal sinuses, and we compared the surgical outcome to that of a conventional transorbital method. Methods A retrospective review of all patients with pure unilateral blowout fractures between March 2007 and March 2013 was conducted. 150 patients were classified into two groups according to the surgical method: conventional transorbital method (group A, 75 patients, control group), and the combination of transorbital and transnasal approach with additional supports from the paranasal sinuses (group B, 75 patients, experimental group). Each group was subdivided depending on fracture location: group I (inferior wall), group IM (inferomedial wall), and group M (medial wall). The surgical results were assessed by the Hertel scale and a comparison of preoperative and postoperative orbital volume ratio (OVR) values. Results In the volumetric analysis, the OVR decreased more by the experimental groups than each corresponding control groups (P<0.05). Upon ophthalmic examination, neither the differences among the groups in the perioperative Hertel scale nor the preoperative and postoperative Hertel scales were statistically significant (P>0.05). Conclusions Our surgical results suggest that orbital volume was more effectively restored by the combination of transorbital and transnasal approach with additional supports from the paranasal sinuses than the conventional method, regardless of the type of fracture.

Lim, Nam Kyu; Oh, Sang Ah; Gu, Ja Hea

2014-01-01

189

ERP effects of spatial attention and display search with unilateral and bilateral stimulus displays  

Microsoft Academic Search

Two experiments were performed in which the effects of selective spatial attention on the ERPs elicited by unilateral and bilateral stimulus arrays were compared. In Experiment 1, subjects received a series of grating patterns. In the unilateral condition these gratings were presented one at a time, randomly to the right or left of fixation. In the bilateral condition, gratings were

Jan J Lange; Albertus A Wijers; Lambertus J. M Mulder; Gijsbertus Mulder

1999-01-01

190

Outcome in patients undergoing unilateral uterine artery embolization for symptomatic fibroids  

Microsoft Academic Search

AIMS: To evaluate patients undergoing uterine artery embolization for symptomatic fibroids who, for technical reasons, underwent unilateral rather than bilateral embolization.PATIENTS: Prospective data were collected on 109 patients undergoing uterine artery embolization for symptomatic fibroids. Of these, six underwent unilateral embolization. They were followed with ultrasound or magnetic resonance imaging (MRI) at 3, 6 and 12 months. Patients' histories were

T Nicholson

2004-01-01

191

Effect of unilateral electro-acupuncture on function of ipsilateral and contralateral tibialis anterior muscle  

Microsoft Academic Search

AIMS: It is known that unilateral resistance exercise or electromyostimulation training can increase muscular strength not only in the trained limb, but also in the homologous muscle of the contralateral limb. The principle of using unilateral therapy to treat conditions of the contralateral limb has been previously applied in traditional Chinese medicine. The primary aim of this study was to

Liping Huang; Shi Zhou; Zhen Lu; Lyndon O Brooks; Qiang Tian; Xia Li; Longjun Cao; Junhai Yu; Hui Wang

2006-01-01

192

Effects of eccentrically and concentrically induced unilateral fatigue on the involved and uninvolved limbs  

Microsoft Academic Search

This study extended findings of others related to the fatigue resistance of maximum voluntary knee extension contractions performed eccentrically on an isokinetic dynamometer. Twelve subjects performed either 75 unilateral isokinetic concentric MVCs or 75 unilateral isokinetic eccentric MVCs at 30°s?1. A uniquely-configured dynamometer provided the opportunity to describe the effect of the concentric or eccentric fatigue protocol on the concentric

Mark D Grabiner; Tammy M Owings

1999-01-01

193

Unilateral mydriasis secondary to ipratropium bromide in a critically ill patient.  

PubMed

Unilateral dilated pupil in a critical patient under sedation is an important clinical sign that requires prompt evaluation. An exhaustive assessment must be performed, including neurological examination and imaging tests, and pharmacological causes must be ruled out. We describe a case of unilateral fixed dilated pupil secondary to the administration of a nebulized cholinergic antagonist, ipratropium bromide, in an unconscious patient. PMID:22787356

Santana-Cabrera, Luciano; Fernández-Tagarro, Ernesto José; Del Amo-Nolasco, Beatriz; Jaén-Sánchez, Nieves; Cáceres-Agra, Juan José

2012-04-01

194

Unilateral relationship enhancement in the treatment of spouses of uncooperative alcohol abusers  

Microsoft Academic Search

This article presents the conceptualization of unilateral relationship enhancement (URE) and a URE treatment program developed for use with the spouses of alcohol abusers unmotivated to enter treatment. Enhancing the marital relationship through a unilateral program is described as an important step in the preparation of the spouse to function as a positive rehabilitative influence with his or her alcohol-abusing

Edwin J. Thomas; Kathryn Betts Adams; Marianne R. Yoshioka; Richard D. Ager

1990-01-01

195

Is Making Divorce Easier Bad for Children? The Long-Run Implications of Unilateral Divorce  

Microsoft Academic Search

I assess the long-run implications for children of growing up in a unilateral divorce environment, which increases the ease of divorce by not requiring the explicit consent of both partners. Using 40 years of census data to exploit the variation across states and over time in changes in divorce regulation, I confirm that unilateral divorce regulations do significantly increase the

Jonathan Gruber

2004-01-01

196

A Comparative Evaluation of Femorofemoral Crossover Bypass and Iliofemoral Bypass for Unilateral Iliac Artery Occlusive Disease  

Microsoft Academic Search

The purpose of this study was to compare the results of extra-anatomic femorofemoral crossover bypass grafting to the anatomic iliofemoral bypass grafting procedure in the treatment of patients with unilateral iliac artery occlusive disease with respect to patency and limb salvage.The records of all patients with unilateral iliac artery disease who underwent revas cularization between January 1988 and December 1995

Munier M. Nazzal; Jamal J. Hoballah; Claudio Jacobovicz; Chittur R. Mohan; Mario Martinasevic; Stephen M. Ryan; William J. Sharp; Timothy F. Kresowik; John D. Corson

1998-01-01

197

Song Recognition by Young Children with Cochlear Implants: Comparison between Unilateral, Bilateral, and Bimodal Users  

ERIC Educational Resources Information Center

Purpose: To examine song identification by preschoolers with normal hearing (NH) versus preschoolers with cochlear implants (CIs). Method: Participants included 45 children ages 3;8-7;3 (years;months): 12 with NH and 33 with CIs, including 10 with unilateral CI, 14 with bilateral CIs, and 9 bimodal users (CI-HA) with unilateral CI and…

Bartov, Tamar; Most, Tova

2014-01-01

198

Longitudinal Development of Hand Function in Children with Unilateral Cerebral Palsy  

ERIC Educational Resources Information Center

Aim: The aim of this study was to describe how the usefulness of the hemiplegic hand develops in children with unilateral cerebral palsy (CP) aged between 18 months and 8 years. Method: A prospective longitudinal study of 43 children (22 males, 21 females) with unilateral CP was conducted. Inclusion age was 18 months to 5 years 4 months (mean 2y…

Holmefur, Marie; Krumlinde-Sundholm, Lena; Bergstrom, Jakob; Eliasson, Ann-Christin

2010-01-01

199

Determinants of Autobiographical Memory in Patients with Unilateral Temporal Lobe Epilepsy or Excisions  

ERIC Educational Resources Information Center

Patients with unilateral temporal lobe epilepsy from hippocampal origin and patients with unilateral surgical excision of an epileptic focus located in the medial temporal lobe were compared to healthy controls on a version of the Autobiographical Interview (AI) adapted to assess memory for event-specific and generic personal episodes. For both…

St-Laurent, Marie; Moscovitch, Morris; Levine, Brian; McAndrews, Mary Pat

2009-01-01

200

Case series of 12 children with progressive axial myopia following unilateral cataract extraction  

Microsoft Academic Search

Purpose: We report the occurrence of unilateral progressive axial myopia ipsilaterally in a retrospective analysis of 12 childrenfollowing uniocular cataract surgery. Methods: A retrospective analysis of the case records of children who had developed progressive ipsilateral axial myopia following unilateral cataract surgery was done. Follow-up rangedfrom 4 years to 14 years. Results: Twelve children, 7 male and 5 female, were

M. Vanathi; Radhika Tandon; Jeewan S. Titiyal; Rasik B. Vajpayee

2002-01-01

201

Bilateral Input Protects the Cortex from Unilaterally-Driven Reorganization in Children Who Are Deaf  

ERIC Educational Resources Information Center

Unilateral hearing in childhood restricts input along the bilateral auditory pathways, possibly causing permanent reorganization. In this study we asked: (i) do the auditory pathways develop abnormally in children who are bilaterally deaf and hear with a unilateral cochlear implant? and (ii) can such differences be reversed by restoring input to…

Gordon, Karen A.; Wong, Daniel D. E.; Papsin, Blake C.

2013-01-01

202

Compression fractures of the back  

MedlinePLUS

Vertebral compression fractures ... the most common cause of this type of fracture. Osteoporosis is a disease in which bones become ... the spine, such as multiple myeloma Having many fractures of the vertabrae can lead to kyphosis . This ...

203

Vertebroplasty for Spine Fracture Pain  

MedlinePLUS

MENU Return to Web version Vertebroplasty for Spine Fracture Pain Vertebroplasty for Spine Fracture Pain More than 40 million people in the ... bones that puts them at risk for spine fractures (broken bones). Thinning of the bones can occur ...

204

Fracture After Total Hip Replacement  

MedlinePLUS

... the American Academy of Orthopaedic Surgeons. Fracture A er Total Hip Replacement A periprosthetic fracture is a ... procedure, the majority of periprosthetic fractures occur a er a patient has spent years functioning well with ...

205

Rib fracture - aftercare  

MedlinePLUS

A rib fracture is a crack or break in 1 or more of your rib bones. Your ribs are the round ... A rib fracture can be very painful because your ribs move when you breathe, cough and move your upper body. The ...

206

Avulsion fractures in athletes.  

PubMed Central

34 cases of avulsion fractures are described. Each fracture took place during athletic training or competition. Excepting six sportsmen participating in a general fitness programme, every patient was an active competitive athlete. There were six women and 28 men; their average age was 20.1 years, raised by a few middle-aged "fitness sportsmen". Most avulsion fractures took place in sprinters and hurdlers; next were middle and long distance renner, footballers, fitness joggers, skiers and ice-hockey players. The most usual location of a fracture was the anterior pelvic spines; avulsion fractures were also detected in various parts of lower limbs. There were fewer avulsion fractures in the area of the trunk and upper extremities. Roetgenologically, the diagnosis of an avulsion fracture is generally easy to make. However, the diagnosis is facilitated by knowing the mechanism of the injury, the technique of the athletic event, and some of the training methods. Generally, a fracture heals well, even if it requires both sufficient immobilisation and some delay in resuming physical exertion. PMID:884433

Orava, S.; Ala-Ketola, L.

1977-01-01

207

Fractures in myelomeningocele  

PubMed Central

Background In patients with myelomeningocele (MMC), a high number of fractures occur in the paralyzed extremities, affecting mobility and independence. The aims of this retrospective cross-sectional study are to determine the frequency of fractures in our patient cohort and to identify trends and risk factors relevant for such fractures. Materials and methods Between March 1988 and June 2005, 862 patients with MMC were treated at our hospital. The medical records, surgery reports, and X-rays from these patients were evaluated. Results During the study period, 11% of the patients (n = 92) suffered one or more fractures. Risk analysis showed that patients with MMC and thoracic-level paralysis had a sixfold higher risk of fracture compared with those with sacral-level paralysis. Femoral-neck z-scores measured by dual-energy X-ray absorptiometry (DEXA) differed significantly according to the level of neurological impairment, with lower z-scores in children with a higher level of lesion. Furthermore, the rate of epiphyseal separation increased noticeably after cast immobilization. Mainly patients who could walk relatively well were affected. Conclusions Patients with thoracic-level paralysis represent a group with high fracture risk. According to these results, fracture and epiphyseal injury in patients with MMC should be treated by plaster immobilization. The duration of immobilization should be kept to a minimum (<4 weeks) because of increased risk of secondary fractures. Alternatively, patients with refractures can be treated by surgery, when nonoperative treatment has failed. PMID:20721596

Bresch, Bjoern; Raiss, Patric; Furstenberg, Carl Hans; Bruckner, Thomas; Seyler, Thorsten; Carstens, Claus; Abel, Rainer

2010-01-01

208

Plate versus titanium elastic nail in treatment of displaced midshaft clavicle fractures  

PubMed Central

Background: With changing trends in treatment of displaced midshaft clavicle fractures (DMCF), plating remains the standard procedure for fixation. An attracting alternative method of fixation is the titanium elastic nailing (TEN). However, prospective randomized studies comparing the two methods of fixation are lacking. We assessed the effectiveness of minimally invasive antegrade TEN and plating technique for the treatment of DMCF. Materials and Methods: 80 unilateral displaced midclavicular fractures operated between October 2010 and May 2013 were included in study. This prospective comparative study was approved by the local ethical committee. Followups were at 2nd and 6th weeks and subsequently at 3, 6, 12, 18 and 24 months postoperatively. Primary outcome was measured by the Constant score, union rate and difference in clavicular length after fracture union. Secondary outcome was measured by operative time, intraoperative blood loss, wound size, cosmetic results and complications. Results: During analysis, we had 37 patients in the plate group and 34 patients in the TEN group. There was no significant difference in Constant scores between the two groups. However, faster fracture union, lesser operative time, lesser blood loss, easier implant removal and fewer complications were noted in the TEN group. Conclusion: The use of minimally invasive antegrade TEN for fixation of displaced midshaft clavicle fractures is recommended in view of faster fracture union, lesser morbidity, better cosmetic results, easier implant removal and fewer complications; although for comminuted fractures plating remains the procedure of choice.

Saha, Partha; Datta, Prasenjit; Ayan, Saankritya; Garg, Anant Kumar; Bandyopadhyay, Utpal; Kundu, Srikanta

2014-01-01

209

[Fall and fracture risk].  

PubMed

Falls and fall-related fractures are a major problem among older adults. These injuries often cause continuous pain, functional impairments, and mortality. While the majority of falls do not result in fractures, most fractures are due to falls. Especially, almost all hip fractures (95%) result from falls. And so, it is very important to analyze falls and risk factors for falls. A history of falls is the major independent predictor of future fall risk. To date, several strategies have been provided to control risk factors for fall. To prevent falls and fall-induced injuries and fractures, multicomponent exercise, home hazard assessment and modification and use of hip protectors have proven efficient. PMID:20808042

Koike, Tatsuya

2010-09-01

210

Evaluation of the relationship between fracture conductivity, fracture fluid production, and effective fracture length  

E-print Network

Low-permeability gas wells often produce less than predicted after a fracture treatment. One of the reasons for this is that fracture lengths calculated after stimulation are often less than designed lengths. While actual fracture lengths may...

Lolon, Elyezer P.

2006-04-12

211

Renal dysplasia with unilateral renal agenesis in a dog.  

PubMed

This report describes a renal dysplastic lesion associated with renal agenesis in a 3-year-old dog with chronic renal failure. Haematological examination revealed non-regenerative anaemia, azotaemia, increased creatinine and hyperphosphataemia. At necropsy, the right kidney and right ureter could not be identified. The left kidney was slightly enlarged, with a reduced cortico-medullary ratio. Histologically, the medulla of the left kidney had persistent mesenchyme and primitive tubules (tall pseudostratified columnar epithelium), dilated collecting ducts lined by flattened epithelium, and adenomatoid proliferation of cuboidal epithelium; fetal or immature glomeruli could not be identified. To our knowledge, this is the first report of a renal dysplastic lesion with unilateral agenesis in animals. PMID:15899491

Morita, T; Michimae, Y; Sawada, M; Uemura, T; Araki, Y; Haruna, A; Shimada, A

2005-07-01

212

Congenital Unilateral Corneal Anaesthesia with Microphthalmos: A Case Report  

PubMed Central

Congenital corneal anaesthesia (CCA) is an uncommon condition difficult to diagnose. We report the case of a 20-month-old boy who presented with unilateral congenital corneal anaesthesia. The child was referred with a persistent corneal epithelial defect, unresponsive to symptomatic local treatment for over 10 months. Intensive topical treatment and strict corneal protection led to quick corneal healing. Congenital corneal anaesthesia occurs either alone or in association with neurological diseases or systemic congenital abnormalities. It is important to search for corneal anaesthesia in children with chronic ulcerations of the cornea and self-inflicted injuries. Early diagnosis and treatment are important due to the risk of poor visual prognosis. Management of CCA should aim for the prevention of epithelial defects and is a life-long process. PMID:22606500

Voyatzis, George; Mukherjee, Achyut; Rajan, Madhavan S.; Allen, Louise E.

2012-01-01

213

Unilateral microtia in an infant with trisomy 18 mosaicism.  

PubMed

Trisomy 18 is the second most frequent autosomal aneuploidy, after Down's syndrome, in humans. It causes severe congenital abnormalities and mental retardation although phenotypic features, clinical manifestations and prognosis vary occasionally. In cases oftrisomy 18 mosaicism, as in every chromosomal mosaicism, the spectrum of clinical characteristics extends from pathological to almost normal. We report a 9 months old female infant who has been referred to the Genetics Department for evaluation because of unilateral severe microtia, aplasia of mastoid abscess and hemifacial palsy and inlet type intraventricular defect with pulmonary hypertension. Chromosomal investigation revealed a mosaic trisomy 18 [46,XX/47,XX+18] in proportion of 52% and 48% respectively. Microtia/anotia is present in 1.46-4.36/10,000 live births in the general population while the combination of microtia/anotia with trisomy 18 has been reported in very few cases in the relevant bibliography. PMID:19650416

Giannatou, E; Leze, H; Katana, A; Kolialexi, A; Mavrou, A; Kanavakis, E; Kitsiou-Tzeli, S

2009-01-01

214

Painful unilateral temporalis muscle enlargement: reactive masticatory muscle hypertrophy.  

PubMed

An instance of isolated unilateral temporalis muscle hypertrophy (reactive masticatory muscle hypertrophy with fiber type 1 predominance) confirmed by muscle biopsy with histochemical fiber typing and image analysis in a 62 year-old man is reported. The patient presented with bruxism and a painful swelling of the temple. Absence of asymmetry or other abnormalities of the craniofacial skeleton was confirmed by magnetic resonance imaging and cephalometric analyses. The patient achieved symptomatic improvement only after undergoing botulinum toxin injections. Muscle biopsy is key in the diagnosis of reactive masticatory muscle hypertrophy and its distinction from masticatory muscle myopathy (hypertrophic branchial myopathy) and other non-reactive causes of painful asymmetric temporalis muscle enlargement. PMID:23900775

Katsetos, Christos D; Bianchi, Michael A; Jaffery, Fizza; Koutzaki, Sirma; Zarella, Mark; Slater, Robert

2014-06-01

215

Unilateral duplication of vas deferens: a cadaveric case report  

PubMed Central

Duplication of vas deferens is a rare congenital anomaly. All previously reported cases of this rare anomaly were identified during procedures such as orchiepexy, inguinal hernia repair, vasectomy, varicocoelectomy, and radical prostatectomy. Here, we report a case of unilateral duplicated vas deferens noted in an adult cadaver during regular dissection for medical students. The right spermatic cord contained 2 separate and completely developed cord-like structures. Both cords communicated separately with the tail of the epididymis. When traced cranially, both traversed the inguinal canal as content of the spermatic cord and finally fused at the level of the deep inguinal ring. No other variations were found in the testis or epididymis, and no variations were seen in the left spermatic cord. In addition, no associated renal abnormalities were noted. PMID:23560239

Sirasanagandla, Srinivasa Rao; Nayak, Satheesha B.; Jetti, Raghu

2013-01-01

216

Persistent Mullerian duct syndrome: a rare cause of unilateral cryptorchidism  

PubMed Central

Persistent Mullerian duct syndrome (PMDS) is a rare syndrome and sometimes the cause of a common problem in paediatric and surgical practice, namely undescended testes. PMDS is a recessive disease in which there is a defect in anti-Mullerian hormone secretion or receptor activity resulting in persistence of Mullerian structures such as a uterus or fallopian tubes with otherwise normal virilisation. Here the authors present a case of a 1½-year-old boy who was referred to their hospital because of unilateral cryptorchidism. During laparoscopic surgery, two gonads were present joined together by a uterus-like structure. Additional investigations showed a normal male karyotype and biopsies of the gonads revealed infantile testis parenchyma making the diagnosis PMDS likely. PMID:22977013

Keukens, Laura; Zijp, Gerda; Mul, Dick

2012-01-01

217

Osteoporosis and Skeletal Fractures  

PubMed Central

Osteoporosis affects millions of individuals worldwide, rendering them susceptible to fragility fractures of the spine, hip, and wrist and leading to significant morbidity, mortality, and economic cost. Given the substantial impact of osteoporosis on both patients and the medical community, it is imperative that physicians improve awareness and knowledge of osteoporosis in the setting of low-energy fractures. In this review, we provide information on effective means of preventing fragility fractures and introduce clinicians to issues pertinent to the patient who suffers an osteoporotic fracture. Prevention of fragility fractures centers around adequate mineral nutrition, including daily calcium and vitamin D supplementation, as well as prescription antiresorptive medications such as bisphosphonates or teriparatide therapy in severe cases, both of which have been shown to decrease future fracture risk. Balance and strength training also play important roles in the management of the osteoporotic patient, particularly following a low-energy fracture, and external hip protectors may be useful for certain patients. Kyphoplasty and vertebroplasty are two minimally invasive techniques that show great promise in the treatment of vertebral compression fractures, although questions regarding long-term biomechanical effects still exist. Traditionally, osteoporosis has been underdiagnosed and undertreated following a low-energy fracture in an elderly patient. Although treatment rates may be improving through public health initiatives, the majority of patients with osteoporosis remain inadequately treated. Perioperative intervention programs that focus on patient education about osteoporosis and treatment options lead to significant increases in intervention and treatment. Reducing the risk of skeletal fractures in patients susceptible to osteoporosis involves improved physician education on the risk factors and management of osteoporosis, as well as informing patients on the significance of dual-energy X-ray absorptiometry testing and medical treatment so that they may serve as their own healthcare advocates in this often-undertreated disease. PMID:18751849

Demetrakopoulos, Demetris; Shindle, Michael K.; Griffith, Matthew H.; Lane, Joseph M.

2006-01-01

218

Emotional Perception of Music in Children with Unilateral Cochlear Implants  

PubMed Central

Introduction: Cochlear implantation (CI) improves language skills among children with hearing loss. However, children with CIs still fall short of fulfilling some other needs, including musical perception. This is often attributed to the biological, technological, and acoustic limitations of CIs. Emotions play a key role in the understanding and enjoyment of music. The present study aimed to investigate the emotional perception of music in children with bilaterally severe-to-profound hearing loss and unilateral CIs. Materials and Methods: Twenty-five children with congenital severe-to-profound hearing loss and unilateral CIs and 30 children with normal hearing participated in the study. The children’s emotional perceptions of music, as defined by Peretz (1998), were measured. Children were instructed to indicate happy or sad feelings fostered in them by the music by pointing to pictures of faces showing these emotions. Results: Children with CI obtained significantly lower scores than children with normal hearing, for both happy and sad items of music as well as in overall test scores (P<0.001). Furthermore, both in CI group (P=0.49) and the control one (P<0.001), the happy items were more often recognized correctly than the sad items. Conclusion: Hearing-impaired children with CIs had poorer emotional perception of music than their normal peers. Due to the importance of music in the development of language, cognitive and social interaction skills, aural rehabilitation programs for children with CIs should focus particularly on music. Furthermore, it is essential to enhance the quality of musical perception by improving the quality of implant prostheses. PMID:25320700

Shirvani, Sareh; Jafari, Zahra; Sheibanizadeh, Abdolreza; Motasaddi Zarandy, Masoud; Jalaie, Shohre

2014-01-01

219

Distinguishing stress fractures from pathologic fractures: a multimodality approach  

Microsoft Academic Search

Whereas stress fractures occur in normal or metabolically weakened bones, pathologic fractures occur at the site of a bone tumor. Unfortunately, stress fractures may share imaging features with pathologic fractures on plain radiography, and therefore other modalities are commonly utilized to distinguish these entities. Additional cross-sectional imaging with CT or MRI as well as scintigraphy and PET scanning is often

Laura M. Fayad; Ihab R. Kamel; Satomi Kawamoto; David A. Bluemke; Frank J. Frassica; Elliot K. Fishman

2005-01-01

220

Tibial fractures in children  

PubMed Central

Background Tibial fracture is the third most common long-bone fracture in children. Traditionally, most tibial fractures in children have been treated non-operatively, but there are no long-term results. Methods 94 children (64 boys) were treated for a tibial fracture in Aurora City Hospital during the period 1980–89 but 20 could not be included in the study. 58 of the remaining 74 patients returned a written questionnaire and 45 attended a follow-up examination at mean 27 (23–32) years after the fracture. Results 89 children had been treated by manipulation under anesthesia and cast-immobilization, 4 by skeletal traction, and 1 with pin fixation. 41 fractures had been re-manipulated. The mean length of hospital stay was 5 (1–26) days. Primary complications were recorded in 5 children. The childrens’ memories of treatment were positive in two-thirds of cases. The mean subjective VAS score (range 0–10) for function appearance was 9. Leg-length discrepancy (5–10 mm) was found clinically in 10 of 45 subjects and rotational deformities exceeding 20° in 4. None of the subjects walked with a limp. None had axial malalignment exceeding 10°. Osteoarthritis of the hip and/or knee was seen in radiographs from 2 subjects. Interpretation The long-term outcome of tibial fractures in children treated non-operatively is generally good. PMID:24786903

Palmu, Sauli A; Auro, Sampo; Lohman, Martina; Paukku, Reijo T; Peltonen, Jari I; Nietosvaara, Yrjana

2014-01-01

221

Evaluation of the relationship between fracture conductivity, fracture fluid production, and effective fracture length  

NASA Astrophysics Data System (ADS)

Low-permeability gas wells often produce less than predicted after a fracture treatment. One of the reasons for this is that fracture lengths calculated after stimulation are often less than designed lengths. While actual fracture lengths may be shorter due to fracture growth out of zone, improper proppant settling, or proppant flowback, short calculated fracture lengths can also result from incorrect analysis techniques. It is known that fracturing fluid that remains in the fracture and formation after a hydraulic fracture treatment can decrease the productivity of a gas well by reducing the relative permeability to gas in the region invaded by this fluid. However, the relationships between fracture fluid cleanup, effective fracture length, and well productivity are not fully understood. In this work I used reservoir simulation to determine the relationship between fracture conductivity, fracture fluid production, effective fracture length, and well productivity. I simulated water saturation and pressure profiles around a propped fracture, tracked gas production along the length of the propped fracture, and quantified the effective fracture length (i.e., the fracture length under single-phase flow conditions that gives similar performance as for multiphase flow conditions), the "cleanup" fracture length (i.e., the fracture length corresponding to 90% cumulative gas flow rate into the fracture), and the "apparent" fracture length (i.e., the fracture length where the ratio of multiphase to single-phase gas entry rate profiles is unity). This study shows that the proppant pack is generally cleaned up and the cleanup lengths are close to designed lengths in relatively short times. Although gas is entering along entire fracture, fracturing fluid remains in the formation near the fracture. The water saturation distribution affects the gas entry rate profile, which determines the effective fracture length. Subtle changes in the gas rate entry profile can result in significant changes in effective fracture length. The results I derived from this work are consistent with prior work, namely that greater fracture conductivity results in more effective well cleanup and longer effective fracture lengths versus time. This study provides better explanation of mechanisms that affect fracturing fluid cleanup, effective fracture length, and well productivity than previous work.

Lolon, Elyezer P.

222

Fracture and vuggy porosity  

SciTech Connect

An attempt has been made to gather a comprehensive worldwide data suite large enough to establish reliable porosity ranges for a series of reservoir types. A simple practical classification into seven types of fractured and leached reservoirs has been adopted based on tectonic style and leaching processes. Any figures quoted in literature were critically examined and only used when there was clear evidence that they were based on thorough fracture/vug spacing and fracture/vug width and size studies or on reliable material balance calculations. This reduced the data set to a fraction of its original size but the resulting table is thought to stand up to scrutiny. 67 refs.

Weber, K.J.; Bakker, M.

1981-01-01

223

Sunspots and hip fractures.  

PubMed

In this paper a remarkable statistical link between sunspot cycles and prevalence of hip fractures in the elderly is shown. Hip fractures in old people are due to: 1. increased bone fragility for metabolic bone disease; 2. increased propension to fall. Though it is obvious that a correlation does not imply any causal relationship, reasonable conjectures can be allowed. The hypothesis of an 11-year cyclic variation of ultraviolet radiation as a cause of hip fractures is untenable; one may better assume that solar flares can negatively influence the nervous postural regulation leading to a greater propensity to accidental falls. PMID:1935412

Caniggia, M; Scala, C

1991-01-01

224

Mechanical Coal-Face Fracturer  

NASA Technical Reports Server (NTRS)

Radial points on proposed drill bit take advantage of natural fracture planes of coal. Radial fracture points retracted during drilling and impacted by piston to fracture coal once drilling halts. Group of bits attached to array of pneumatic drivers to fracture large areas of coal face.

Collins, E. R., Jr.

1984-01-01

225

Other non-vertebral fractures.  

PubMed

Non-vertebral non-hip (NVNH) fractures account for 90% of all fractures in patients up to 80 years of age and for 59% thereafter. There is a significant relationship between reductions in peripheral bone mineral density and the risk of fractures at various NVNH sites except for the face. Fractures of the clavicle, upper arm, forearm, spine, ribs, hip, pelvis, upper leg and lower leg elevate the risk of future fractures. Among NVNH fractures in women aged 80 years or over, forearm fractures have the highest incidence, and proximal humerus fractures have the second highest incidence. There is a large variation in incidence across geographical regions, with incidence higher in Northern Europe and lower in Asia and Africa. NVNH fractures are associated with higher mortality and significantly higher health-care costs than controls with osteoporosis. Reductions in health-related quality of life (HRQOL) for women with major NVNH fractures are of a similar magnitude as reductions for women with incident hip fractures; however, forearm fractures do not significantly affect HRQOL. Therapeutic options for NVNH fractures differ by fracture location. The recent development of implants for internal fixation made it a more popular choice for treating distal radius and proximal humerus fractures; however, treatment decisions should take into account patient age, activity levels, co-morbidities and injury characteristics. The recent increase in the number of patients with osteoporotic pelvic fractures is drastic, although they can generally be treated non-surgically with pain management and mobilisation. PMID:24836332

Hagino, Hiroshi

2013-12-01

226

Bone fracture repair - series (image)  

MedlinePLUS

Fractures of the bones are classified in a number of ways. A simple fracture involves a single fracture line through ... off or burned (cauterized). If examination of the fracture shows that a quantity of bone has been lost as a result of the ...

227

Stress fractures in ballet dancers  

Microsoft Academic Search

We surveyed 54 female dancers in two professional ballet companies. A total of 27 fractures were reported in 17 dancers. Metatarsal fractures were the most common (63%), followed by fractures of the tibia (22%) and spine (7%). Dancers who danced >5 hours per day were significantly more likely to have a stress fracture than those dancing <5 hours per day.

Nancy J. Kadel; Carol C. Teitz; Richard A. Kronmal

1992-01-01

228

Unilateral gallium-67 uptake in primary tuberculosis of the major salivary glands  

SciTech Connect

Unilateral radionuclide accumulation in salivary glands is an uncommon finding on gallium scintigraphy. The differential diagnosis includes malignant tumors and inflammatory processes of these organs. Two cases of unilateral gallium uptake of the parotid and submandibular gland respectively, verified as solitary tuberculosis, are presented, together with the correlative findings of Tc-99m pertechnetate scintigraphy, sialography, and sonography. None of these imaging modalities is specific enough to provide pathognomonic signs for tuberculosis. When assessing unilateral gallium uptake of the salivary glands, one should be aware of the possibility of tuberculosis.

Bihl, H.; Maier, H.

1987-08-01

229

A case of traumatic bilateral abducens and unilateral hypoglossal nerve palsy  

PubMed Central

Patient: Female, 47 Final Diagnosis: Traumatic bilateral abducens • unilateral hypoglossal nerve palsy Symptoms: Diplopia Medication: — Clinical Procedure: — Specialty: Neurology Objective: Rare disease Background: Incidence of unilateral abducens palsy from head trauma has been reported to be as high as 1% to 2.7%, but bilateral abducens nerve palsy is extremely rare. Case Report: We present a case in which bilateral abducens nerve and unilateral hypoglossal nerve palsy developed with a high Glasgow Coma Score (GCS) 3 hours after head trauma due to a motor vehicle crash. Conclusions: This case highlights the occurrence and management of posttraumatic bilateral sixth nerve palsy. PMID:23847710

Selcuk, Ferda; Mut, Senem E.

2013-01-01

230

Fracturing fluids -- then and now  

SciTech Connect

Fracturing fluid provides the means by which the hydraulic fracturing process can take place. All applications of well stimulation by fracturing must include selection of fracturing fluid in the initial phases of fracture design and treatment planning. Fracturing fluid has two important purposes: (1) to provide sufficient viscosity to suspend and transport proppant deep into the created fracture system and (2) to decompose, or break, chemically to a low viscosity to allow flowback of a major part of the fluid to the surface for fracture cleanup after the treatment is completed. Because of the importance of its rheological properties and behavior in the fracture under reservoir conditions during (and immediately after) the treatment, service company research laboratories have spent millions of dollars on R and D of fracturing fluids.

Jennings, A.R. Jr. [Enhanced Well Stimulation Inc., Plano, TX (United States)

1996-07-01

231

Metatarsal stress fractures - aftercare  

MedlinePLUS

... McCormack RG, Lopez CA. Commonly encountered fractures in sports medicine. In: Miller MD, Thompson SR, eds. DeLee and Drez's Orthopaedic Sports Medicine . 4th ed. Philadelphia, PA: Saunders Elsevier; 2014:chap. ...

232

Tibia (Shinbone) Shaft Fractures  

MedlinePLUS

... doctor will consider a range of treatment options. Cast and functional brace. One proven nonsurgical treatment method is to immobilize the fracture in a cast for initial healing. A er weeks in the ...

233

Pediatric Orbital Fractures  

PubMed Central

It is wise to recall the dictum “children are not small adults” when managing pediatric orbital fractures. In a child, the craniofacial skeleton undergoes significant changes in size, shape, and proportion as it grows into maturity. Accordingly, the craniomaxillofacial surgeon must select an appropriate treatment strategy that considers both the nature of the injury and the child's stage of growth. The following review will discuss the management of pediatric orbital fractures, with an emphasis on clinically oriented anatomy and development. PMID:24436730

Oppenheimer, Adam J.; Monson, Laura A.; Buchman, Steven R.

2013-01-01

234

Interlaminar fracture of composites  

NASA Technical Reports Server (NTRS)

Fracture mechanics has been found to be a useful tool for understanding composite delamination. Analyses for calculating strain energy release rates associated with delamination growth have been developed. These analyses successfully characterized delamination onset and growth for particular sources of delamination. Low velocity impact has been found to be the most severe source of composite delamination. A variety of test methods for measuring interlaminar fracture toughness are being developed to identify new composite materials with enhanced delamination resistance.

Obrien, T. K.

1984-01-01

235

Reduction of the Fracture  

Microsoft Academic Search

A meticulous clinical and radiologic examination (analysis of the fracture type), an anatomic reduction, a properly executed\\u000a internal fixation and a correct rehabilitation (mobilization as early as possible with weight-bearing) are the most important\\u000a parts for any head-preserving treatment of neck fractures. We are in full agreement with authors who insist on the cardinal\\u000a role of reduction (Parker and Pryor,

J. Manninger; T. Salacz; K. Fekete

236

Detecting Unilateral Phrenic Paralysis by Acoustic Respiratory Analysis  

PubMed Central

The consequences of phrenic nerve paralysis vary from a considerable reduction in respiratory function to an apparently normal state. Acoustic analysis of lung sound intensity (LSI) could be an indirect non-invasive measurement of respiratory muscle function, comparing activity on the two sides of the thoracic cage. Lung sounds and airflow were recorded in ten males with unilateral phrenic paralysis and ten healthy subjects (5 men/5 women), during progressive increasing airflow maneuvers. Subjects were in sitting position and two acoustic sensors were placed on their back, on the left and right sides. LSI was determined from 1.2 to 2.4 L/s between 70 and 2000 Hz. LSI was significantly greater on the normal (19.3±4.0 dB) than the affected (5.7±3.5 dB) side in all patients (p?=?0.0002), differences ranging from 9.9 to 21.3 dB (13.5±3.5 dB). In the healthy subjects, the LSI was similar on both left (15.1±6.3 dB) and right (17.4±5.7 dB) sides (p?=?0.2730), differences ranging from 0.4 to 4.6 dB (2.3±1.6 dB). There was a positive linear relationship between the LSI and the airflow, with clear differences between the slope of patients (about 5 dB/L/s) and healthy subjects (about 10 dB/L/s). Furthermore, the LSI from the affected side of patients was close to the background noise level, at low airflows. As the airflow increases, the LSI from the affected side did also increase, but never reached the levels seen in healthy subjects. Moreover, the difference in LSI between healthy and paralyzed sides was higher in patients with lower FEV1 (%). The acoustic analysis of LSI is a relevant non-invasive technique to assess respiratory function. This method could reinforce the reliability of the diagnosis of unilateral phrenic paralysis, as well as the monitoring of these patients. PMID:24718599

Fiz, Jose Antonio; Jane, Raimon; Lozano, Manuel; Gomez, Rosa; Ruiz, Juan

2014-01-01

237

Detecting unilateral phrenic paralysis by acoustic respiratory analysis.  

PubMed

The consequences of phrenic nerve paralysis vary from a considerable reduction in respiratory function to an apparently normal state. Acoustic analysis of lung sound intensity (LSI) could be an indirect non-invasive measurement of respiratory muscle function, comparing activity on the two sides of the thoracic cage. Lung sounds and airflow were recorded in ten males with unilateral phrenic paralysis and ten healthy subjects (5 men/5 women), during progressive increasing airflow maneuvers. Subjects were in sitting position and two acoustic sensors were placed on their back, on the left and right sides. LSI was determined from 1.2 to 2.4 L/s between 70 and 2000 Hz. LSI was significantly greater on the normal (19.3±4.0 dB) than the affected (5.7±3.5 dB) side in all patients (p?=?0.0002), differences ranging from 9.9 to 21.3 dB (13.5±3.5 dB). In the healthy subjects, the LSI was similar on both left (15.1±6.3 dB) and right (17.4±5.7 dB) sides (p?=?0.2730), differences ranging from 0.4 to 4.6 dB (2.3±1.6 dB). There was a positive linear relationship between the LSI and the airflow, with clear differences between the slope of patients (about 5 dB/L/s) and healthy subjects (about 10 dB/L/s). Furthermore, the LSI from the affected side of patients was close to the background noise level, at low airflows. As the airflow increases, the LSI from the affected side did also increase, but never reached the levels seen in healthy subjects. Moreover, the difference in LSI between healthy and paralyzed sides was higher in patients with lower FEV1 (%). The acoustic analysis of LSI is a relevant non-invasive technique to assess respiratory function. This method could reinforce the reliability of the diagnosis of unilateral phrenic paralysis, as well as the monitoring of these patients. PMID:24718599

Fiz, José Antonio; Jané, Raimon; Lozano, Manuel; Gómez, Rosa; Ruiz, Juan

2014-01-01

238

Fracture of the penis: treatment and complications.  

PubMed

Fracture of the penis is an unusual blunt traumatic injury of the erect penis. Twenty-five such cases, treated at the 2 main urological departments in the town of Varna between 1984 and 1999, were analyzed retrospectively. The average annual incidence in this series was 0.33 per 100,000 inhabitants. Most of the injuries occurred during vigorous sexual intercourse. Clinical diagnosis was mainly based on the patient's history and the physical findings. The diagnosis was verified by ultrasonography. In a few cases retrograde urethrography and cavernosography were used as additional diagnostic tools. Cavernosography was complicated by postprocedural priapism in 1 case. Unilateral tear of the corpora cavernosa was found in 24 cases. In 3 cases, partial (in 2) or complete (in 1) disruption of the corpus spongiosum and the urethra was found as well. The trauma was bilateral in 1 case in which 2/3 of the entire circumference of the penis was ruptured, including both corpora cavernosa and the urethra. Seventeen patients received immediate surgical repair. Most of them experienced an uneventful postoperative period with no serious consequences affecting their sexual function. Surgery was delayed in 6 and rejected in 2 cases. In all cases in which conservative (nonsurgical) management was the first treatment option, late complications (penile aneurysm, induration, penile curvature, erectile dysfunction) were observed and the final results were assessed as satisfactory or poor. We recommend immediate surgical treatment of all cases of penile fracture. Emergency surgical repair offers a chance for complete recovery and is the best method for providing a good functional prognosis. PMID:11061570

Hinev, A

2000-10-01

239

Tomographic index as auxiliary criteria for surgery indication in fracture dislocation of acetabulum posterior wall  

PubMed Central

There are situations which the tomographic exam is done on the affected hip or situations where the contralateral hip presents abnormalities that make it impossible to compare. In this study we aimed to evaluate a tomographic index that does not require comparison between the both hips. Twenty two patients with unilateral acetabular fracture dislocation with fracture of posterior wall were studied. We established the relationship between the remaining posterior wall and the femoral head diameter (head/wall index-H/W index). We evaluated 45 two-dimensional computed tomography scan in normal hips and established the H/W index. In 45 normal hips we simulated a posterior wall fracture with involvement of 25% and 30% of the posterior wall and calculated the H/W index. We divided into five groups with five different H/W index (fractured group with non surgical treatment; fractured group; normal group; normal group with simulated fracture of 25% and; 30% of the posterior wall). 2.4 was the lowest limit of confidence interval of the group with 25% of the posterior wall fracture. When we analyzed the confidence interval of the 30% fracture group the upper limit of the confidence interval was 2.7, close to the lower limit of the surgical group that was 2.9. Thus, we suggest the 2.4 the H/W index limit as an auxiliary criteria to indicate whether or not to operate. H/W index is helpful to decide whether or not surgery indication in the fracture dislocation of the posterior wall of the acetabulum. PMID:22715811

2012-01-01

240

Getting a Grip on Memory: Unilateral Hand Clenching Alters Episodic Recall.  

National Technical Information Service (NTIS)

Unilateral hand clenching increases neuronal activity in the frontal lobe of the contralateral hemisphere. Such hand clenching is also associated with increased experiencing of a given hemisphere s mode of processing. Together, these findings suggest that...

M. Weiss, R. E. Propper, S. E. McGraw, T. T. Brunye

2013-01-01

241

Management of small unilateral renal cell carcinomas: Radical versus nephron-sparing surgery  

Microsoft Academic Search

Objectives.There is controversy concerning the management of small unilateral renal cell carcinomas. The present study was undertaken to evaluate the relative efficacy of radial nephrectomy versus nephron-sparing surgery in such patients.

Brian P. Butler; Andrew C. Novick; David P. Miller; Steven A. Campbell; Mark R. Licht

1995-01-01

242

Getting a grip on memory: unilateral hand clenching alters episodic recall.  

PubMed

Unilateral hand clenching increases neuronal activity in the frontal lobe of the contralateral hemisphere. Such hand clenching is also associated with increased experiencing of a given hemisphere's "mode of processing." Together, these findings suggest that unilateral hand clenching can be used to test hypotheses concerning the specializations of the cerebral hemispheres during memory encoding and retrieval. We investigated this possibility by testing effects of unilateral hand clenching on episodic memory. The hemispheric Encoding/Retrieval Asymmetry (HERA) model proposes left prefrontal regions are associated with encoding, and right prefrontal regions with retrieval, of episodic memories. It was hypothesized that right hand clenching (left hemisphere activation) pre-encoding, and left hand clenching (right hemisphere activation) pre-recall, would result in superior memory. Results supported the HERA model. Also supported was that simple unilateral hand clenching can be used as a means by which the functional specializations of the cerebral hemispheres can be investigated in intact humans. PMID:23638094

Propper, Ruth E; McGraw, Sean E; Brunyé, Tad T; Weiss, Michael

2013-01-01

243

Unilateral forced nostril breathing affects dichotic listening for emotional tones.  

PubMed

Unilateral forced nostril breathing (UFNB) through the left nostril is associated with enhanced spatial abilities, whereas UFNB through the right nostril is associated with enhanced verbal abilities. However, the effects of UFNB on standard tasks of laterality (e.g., dichotic listening) are unknown. This study employed dichotic listening for word targets, which typically exhibits a right ear advantage (REA), and dichotic listening for emotional targets, which typically exhibits a left ear advantage (LEA). Participants were asked to breathe either through their dominant nostril (congruent UFNB) or to breathe through their non-dominant nostril (incongruent UFNB) for the entire testing session. There was a significant three-way interaction between the type of dichotic listening task, nostril dominance, and nostril assignment, with the expected REA for word targets and the expected LEA for emotional targets-with one exception. Right nostril dominant participants assigned to the congruent condition exhibited an LEA for emotional targets (p < .05). The other three groups exhibited the expected LEA/right hemisphere advantage for the detection of emotional targets and all groups exhibited the expected REA/left hemisphere advantage for detection of word targets. As such, possible bias induced by tactile stimulation of the contralateral face cannot account for these results. Thus, our data are consistent with a selective enhancement of right hemispheric lateralized functions by right nostril UFNB. PMID:15177823

Saucier, Deborah M; Tessem, Farzana Karim; Sheerin, Aaron H; Elias, Lorin

2004-07-01

244

Sympathetic radiofrequency neurolysis for unilateral lumbar hyperhidrosis: a case report.  

PubMed

Patients with hyperhidrosis suffer from physical, social and mental discomfort which often cannot be treated sufficiently using conservative measures. A new percutaneous approach to sympathectomy using radiofrequency denervation has seemed to offer longer duration of action and less incidence of post sympathetic neuralgia. This article reports the authors' experience with sympathetic RF neurolysis in a 35 year old male with right unilateral lumbar hyperhidrosis. Under scopy guided localization of the lumbar spine sympathetic blockade with local anesthetics to L2-5 vertebral levels were performed as a diagnostic block. Lesion effectiveness is monitored by bilateral feet skin temperature measurement. Clinical effects produced by the first sympathetic ganglion block were sustained for 1 week and then RF neurolysis of lumbar sympathetic ganglion was performed to the same levels for a longer effect. The procedure was accomplished within 30 minutes and the patient was discharged within 2 hours after the procedure. Hyperhidrosis was relieved after the procedure and there were no postsympathectomy neuralgia and sexual dysfunction. The patient obtained improvement of lumbar hyperhidrosis at his first month of follow- up and was satisfied with the outcome. In conclusion, RF neurolysis of lumbar sympathetic ganglions is a safe and effective palliative procedure with minimal invasiveness for relieving excessive sweat secretion in patients with localized hyperhidrosis. PMID:19085180

A?ik, Züleyha Soytürk; Orbey, Ba?ak Ceyda; A?ik, Ibrahim

2008-07-01

245

Pulmonary surfactant synthesis after unilateral lung injury in mice.  

PubMed

Aspiration pneumonitis can lead to alveolar surfactant dysfunction. We employed a murine model of unilateral aspiration to compare surfactant synthesis in the injured (I) and noninjured (NI) contralateral lung. Mice were instilled with hydrochloric acid in the right bronchus and, after 18 h, an intraperitoneal dose of deuterated water was administered as precursor of disaturated phosphatidylcholine (DSPC)-palmitate. Selected bronchoalveolar lavage fluid (BALF) was collected at scheduled time points and lungs were removed. We measured DSPC-palmitate synthesis in lung tissue and secretion in BALF by gas chromatography-isotope ratio mass spectrometry, together with total proteins and myeloperoxidase activity (MPO) by spectrophotometry. BALF total proteins and MPO were significantly increased in the I lungs compared with NI and naïve control lungs. The DSPC pool size was significantly lower in the BALF of the I lungs compared with naïve controls. DSPC synthesis was accelerated in the I and NI lungs. DSPC secretion of the I lungs was similar to their respective naïve controls, and it was markedly lower compared with their respective NI contralateral lungs. DSPC synthesis and secretion were faster, especially in the NI lungs, compared with naïve control lungs, as a possible compensatory mechanism due to a cross-talk between the lungs triggered by inflammation, hyperventilation, and/or undetermined type II cell reaction to the injury. PMID:24336880

Lamonica, Giulia; Amigoni, Maria; Vedovelli, Luca; Zambelli, Vanessa; Scanziani, Margherita; Bellani, Giacomo; Grassi, Alice; Simonato, Manuela; Carnielli, Virgilio P; Cogo, Paola E

2014-01-15

246

Primate translational vestibuloocular reflexes. IV. Changes after unilateral labyrinthectomy  

NASA Technical Reports Server (NTRS)

The effects of unilateral labyrinthectomy on the properties of the translational vestibuloocular reflexes (trVORs) were investigated in rhesus monkeys trained to fixate near targets. Translational motion stimuli consisted of either steady-state lateral and fore-aft sinusoidal oscillations or short-lasting transient displacements. During small-amplitude, steady-state sinusoidal lateral oscillations, a small decrease in the horizontal trVOR sensitivity and its dependence on viewing distance was observed during the first week after labyrinthectomy. These deficits gradually recovered over time. In addition, the vertical response component increased, causing a tilt of the eye velocity vector toward the lesioned side. During large, transient lateral displacements, the deficits were larger and longer lasting. Responses after labyrinthectomy were asymmetric, with eye velocity during movements toward the side of the lesion being more compromised. The most profound effect of the lesions was observed during fore-aft motion. Whereas responses were kinematically appropriate for fixation away from the side of the lesion (e.g., to the left after right labyrinthectomy), horizontal responses were anticompensatory during fixation at targets located ipsilateral to the side of the lesion (e.g., for targets to the right after right labyrinthectomy). This deficit showed little recovery during the 3-mo post-labyrinthectomy testing period. These results suggest that inputs from both labyrinths are important for the proper function of the trVORs, although the details of how bilateral signals are processed and integrated remain unknown.

Angelaki, D. E.; Newlands, S. D.; Dickman, J. D.

2000-01-01

247

Bihemispheric ischemic tolerance induced by a unilateral focal cortical lesion.  

PubMed

The purpose of the present study was to determine whether a unilateral photothrombotic brain lesion induces bilateral ischemic tolerance towards a subsequent severe ischemia performed 5 days later. Severe ischemia was induced by transient (1h; t) or permanent (p) occlusion of the middle cerebral artery (MCAO). Rats were sacrificed 24h later. Preconditioning reduced the size of subsequent infarcts in both hemispheres. This effect was most prominent with tMCAO, and ipsilateral preconditioning was more effective than contralateral preconditioning (% of hemispheric volume, mean ± SD: 31.9 ± 3.7 to 19.0 ± 10.3 with ipsilateral tMCAO; 31.9 ± 3.7 to 22.9 ± 4.9 with contralateral tMCAO; 64.7 ± 4.3% to 47.2 ± 12.5% with ipsilateral pMCAO; 64.7 ± 4.3% to 53.1 ± 8.9% with contralateral pMCAO). Ischemic preconditioning was associated with a successive bilateral up-regulation of superoxide dismutases which may be involved in the development of ischemic tolerance. Our data suggest that a focal ischemic brain lesion induces neuroprotective mechanisms in extensive brain areas and thus cause bilateral ischemic tolerance within a certain time window. PMID:24835408

Schumacher, Lena; Urbach, Anja; Lutzenburg, Michael; Bidmon, Hans-J; Witte, Otto W

2014-06-27

248

Unilateral optic disc swelling in a fighter pilot.  

PubMed

Optic disc swelling occurs when there is an obstruction to axonal transport at the level of the lamina cribrosa. This may result from compression, ischemia, inflammation, or metabolic and toxic etiologies. Some of these etiologies may be life threatening and others may be self-limited. Thus, differentiating the different etiologies is important, albeit often difficult. We present a case of a 25-yr-old high-performance fighter aviator who presented with unilateral optic disc swelling 2 d after an F-16 flight, in which decompression was suspected. Visual acuity of the affected eye was decreased to 20/25, with enlarged blind spot and shallow arcuate scotomata on visual field testing. Pupil function, brightness intensity, and color vision were normal. Marked swelling of the entire optic disc, retinal flame-shaped hemorrhages, and engorgement of the retinal veins were seen. Since decompression sickness with nitrogen bubbles obstructing the optic nerve head vasculature was suspected, he was treated with hyperbaric oxygen. He rapidly improved, recovering full vision function within 6 d. No concurrent disease was found on extensive investigation. He returned to high-performance aviation 3 mo after onset of symptoms. No recurrence was seen during 3 yr of follow-up. PMID:19817243

Pokroy, Russell; Barenboim, Erez; Carter, Dan; Assa, Amit; Alhalel, Amir

2009-10-01

249

Captopril induced renographic alteration in unilateral renal artery stenosis  

SciTech Connect

In patients with unilateral renal artery stenosis (URAS) captopril administration will deteriorate glomerular filtration in the affected kidney by interruption of autoregulatory mechanisms. This effect might be detectable on renography and could be useful for the diagnosis of renovascular hypertension. After discontinuation of all medication, Tc-99m diethylene triamine pentaacetic acid (DTPA) gammacamera renography, followed by I-131 orthoiodohippurate (OIH) renography were performed in 15 hypertensive patients who were poorly controlled with medical therapy. This double examination was repeated some days later after administration of 25 mg captopril one hour prior to the examination. After this, angiography was done and patients with stenosis of the renal artery were treated by percutaneous transluminal dilatation (PTD). Five patients were excluded due to bilateral or segmental stenosis of the renal artery. Four URAS-patients, in whom the blood pressure improved after PTD, showed after administration of captopril a striking renographic alteration in the affected kidney. The DTPA-renogram which initially had an upslope phase, showed a blood disappearance curve and the OIH-renogram, which still had an upslope phase, showed a slower excretion. These renographic alteration did not occur in the other 2 URAS-patients, who had no benefit of the PTD and in the 4 remaining patients without stenosis. These findings suggest that captopril induced renographic alterations may be important for the diagnosis of hemodynamic significant URAS. For this purpose either DTPA or OIH can be used.

Oei, H.Y.; Geyskes, G.G.; Dorhout Mees, E.J.; Puijlaert, C.B.A.J.

1984-01-01

250

Dental maturation of unilateral cleft lip and palate  

PubMed Central

Cleft lip and palate (CLP) is the most common craniofacial abnormality and the fourth most common birth defect in Singapore. Many reports suggest that CLP children have delayed dental development and asymmetrical timing of tooth-pair formation. The aim of this study was to investigate the timing of development of permanent teeth in unilateral CLP (UCLP) children and to compare the findings with non-CLP children in Singapore. A total of 60 UCLP children aged between 5 and 9 years (mean 6.64 ± 0.90 years) and a non-CLP control group matched for age, gender, and race were investigated and compared. Dental records and radiographs were studied and the dental maturation was determined using the Demirjian's method (1973). The dental maturation of UCLP children were delayed compared with non-CLP children by a mean of 0.55 ± 0.75 years and the delay was statistically significant (P < 0.001). The UCLP group also had significantly higher risk of asymmetrically developing tooth pairs than the control group (P < 0.001). The most commonly delayed tooth in development was the maxillary cleft-sided lateral incisor. In conclusion, the UCLP children in Singapore demonstrated delayed dental maturation and a higher occurrence of asymmetrical tooth-pair formation than the non-CLP children. PMID:23483778

Tan, Elaine Li Yen; Yow, Mimi; Kuek, Meaw Charm; Wong, Hung Chew

2012-01-01

251

Cognitive Impairment After Unilateral Hemispheric Injury of Congenital or Adult Origin  

Microsoft Academic Search

OBJECTIVE. The purpose of this study was to assess and compare cognitive functioning in adults with unilateral hemispheric injury due to either congenital damage or an ischemic event in young adulthood.\\u000aMETHOD. Adults with cerebral palsy resulting from left hemispheric brain damage were compared with adults who had a unilateral stroke in either the left or the right hemisphere Our

Sandra L. Rogers; Christopher L. Coe; Kara Hartke

2002-01-01

252

Hearing Screening and Diagnostic Evaluation of Children With Unilateral and Mild Bilateral Hearing Loss  

PubMed Central

More than 90% of newborns in the United States are now being screened for hearing loss. A large fraction of cases of unilateral hearing loss and mild bilateral hearing loss are not currently identified through newborn hearing screening. This is of concern because a preponderance of research has demonstrated that unilateral hearing loss and mild bilateral hearing loss can lead to developmental delays and educational problems for some children. To help address this probable underidentification of unilateral hearing loss and mild bilateral hearing loss among infants and children, the Centers for Disease Control and Prevention Early Hearing Detection and Intervention program and the Marion Downs Hearing Center convened a workshop in Breckenridge, Colorado, in July 2005. During this workshop, several issues related to screening and diagnosing unilateral hearing loss and mild bilateral hearing loss were identified, as well as recommendations for future research in this area. Issues identified included the lack of standardized definitions for permanent unilateral hearing loss and mild bilateral hearing loss; the use of screening protocols that are primarily designed to identify bilateral and unilateral hearing losses of a moderate degree or greater (eg, above 40 dB); calibration of screening equipment; availability of facilities that can provide the full range of audiologic, diagnostic, and management services to this pediatric population; and an overall lack of awareness by many professionals and families about the potential effect of unilateral hearing loss and mild bilateral hearing loss. Suggestions for future research, such as identifying ways to improve the identification of cases of unilateral hearing loss and mild bilateral hearing loss, were also discussed. PMID:18270176

Ross, Danielle S.; Holstrum, W. June; Gaffney, Marcus; Green, Denise; Oyler, Robert F.; Gravel, Judith S.

2008-01-01

253

Unilateral ventricular reflux and asymmetric ventricular distribution of intrathecally introduced contrast medium or tracer.  

PubMed

Fourteen cases of totally or predominantly unilateral ventricular reflux and stasis of intrathecally injected radioisotope or contrast medium were demonstrated by scintigraphy or computed tomographic cisternography. All showed asymmetric enlargement of the lateral ventricles and nine had ipsilateral brain lesions. Four case reports are presented. The pathophysiologic mechanism of communicating hydrocephalus and possible causes of unilateral ventricular reflux are discussed, as well as indications for ventricular shunt installation. PMID:6410798

Deisenhammer, E; Hammer, B

1983-01-01

254

Unilateral arm strength training improves contralateral peak force and rate of force development  

Microsoft Academic Search

Neural adaptation following maximal strength training improves the ability to rapidly develop force. Unilateral strength training\\u000a also leads to contralateral strength improvement, due to cross-over effects. However, adaptations in the rate of force development\\u000a and peak force in the contralateral untrained arm after one-arm training have not been determined. Therefore, we aimed to\\u000a detect contralateral effects of unilateral maximal strength

Michael Adamson; Niall MacQuaide; Jan Helgerud; Jan Hoff; Ole Johan Kemi

2008-01-01

255

'No-Show': Therapist Racial\\/Ethnic Disparities in Client Unilateral Termination  

Microsoft Academic Search

In the present study, the authors examined the source of racial\\/ethnic minority (REM) disparities in unilateral termination (i.e., the client ending therapy without informing the therapist)—a form of dropout that is associated with poor alliance and outcome. First, the authors tested whether some therapists were more likely to have clients who reported unilaterally terminating as compared with other therapists. Next,

Jesse Owen; Zac Imel; Jill Adelson; Emil Rodolfa

2012-01-01

256

Do Audiologic Characteristics Predict Outcomes in Children with Unilateral Hearing Loss?  

PubMed Central

Objective To determine whether audiologic characteristics of unilateral hearing loss in children were associated with language, cognitive or achievement scores. Study design Case-control study Setting Pediatric otolaryngology ambulatory practice Patients Cases (n=109) were children aged 6–12 years with permanent unilateral hearing loss; controls (n=95) were siblings with normal bilateral hearing. Interventions Audiologic characteristics measured included side and severity of hearing loss, and word recognition scores in quiet and in noise. Main outcome measures Cognitive abilities were measured using the Wechsler Abbreviated Scale of Intelligence; reading, math and writing achievement was measured with the Wechsler Individual Achievement Test-Second Edition-Abbreviated; and oral language skills were measured with the Oral Written and Language Scales. Results Children with unilateral hearing loss had worse verbal cognitive and oral language scores than children with normal hearing, but no differences in achievement scores. Children with profound unilateral hearing loss tended to have worse cognitive scores and had significantly lower oral language scores. Higher word recognition scores in quiet of the normal hearing ear were associated with higher cognitive, oral language, and reading achievement scores. Higher word recognition scores in noise were slightly correlated with higher oral language scores. Conclusions As expected, children with unilateral hearing loss had worse language scores than their siblings with normal hearing with trends toward worse cognitive scores. Children with profound unilateral hearing loss tended to have worse outcomes than children with normal hearing or less severe unilateral loss. However, there were no differences in outcomes between children with right or left unilateral hearing loss. PMID:24232067

Lieu, Judith E. C.; Karzon, Roanne K.; Ead, Banan; Tye-Murray, Nancy

2014-01-01

257

Is unilateral laparoscopic TEP inguinal hernia repair a job half done? The case for bilateral repair  

Microsoft Academic Search

Introduction  Bilateral laparoscopic totally extraperitoneal (TEP) repair of unilateral hernia is conspicuous in published literature by\\u000a its absence. There are no studies or data on the feasibility, advantages or disadvantages of bilateral repair in all cases\\u000a or in any subset of patients with unilateral primary inguinal hernia. The objective of this study is to investigate the feasibility\\u000a of bilateral laparoscopic exploration

Pawanindra Lal; Prejesh Philips; Jagdish Chander; Vinod K. Ramteke

2010-01-01

258

[Complete unilateral dilation of the vas deferens as a cause of an inguinal mass].  

PubMed

The complete unilateral dilation of the vas deferens is an extremely rare radiologic finding. Most cystic structures adjacent to the prostate can be grouped into cysts and diverticula. The finding of an inguinal mass makes it necessary to rule out intestinal hernias and other entities. We present the case of a patient who developed an inguinal mass secondary to unilateral dilation of the vas deferens. PMID:21733536

Gómez Herrera, J J; Zabía Galíndez, E; Carrera Terrón, R; Borruel Nacenta, S

2013-01-01

259

Stress fractures in ballet dancers.  

PubMed

We surveyed 54 female dancers in two professional ballet companies. A total of 27 fractures were reported in 17 dancers. Metatarsal fractures were the most common (63%), followed by fractures of the tibia (22%) and spine (7%). Dancers who danced greater than 5 hours per day were significantly more likely to have a stress fracture than those dancing less than 5 hours per day. Dancers in the stress fracture group also had a significantly longer duration of amenorrhea than those in the group with no stress fractures. No significant difference was found between the dancers who had stress fractures and those who did not with regard to any of the other variables examined. These data suggest that prolonged amenorrheic intervals and heavy training schedules may predispose ballet dancers to stress fractures. Of the 17 dancers with stress fractures, only 1 had neither of these risk factors. PMID:1357994

Kadel, N J; Teitz, C C; Kronmal, R A

1992-01-01

260

Unilateral versus bilateral thyroarytenoid Botulinum toxin injections in adductor spasmodic dysphonia: a prospective study  

PubMed Central

Objectives In this preliminary prospective study, we compared unilateral and bilateral thyroarytenoid muscle injections of Botulinum toxin (Dysport) in 31 patients with adductor spasmodic dysphonia, who had undergone more than 5 consecutive Dysport injections (either unilateral or bilateral) and had completed 5 concomitant self-rated efficacy and complication scores questionnaires related to the previous injections. We also developed a Neurophysiological Scoring (NPS) system which has utility in the treatment administration. Method and materials Data were gathered prospectively on voice improvement (self-rated 6 point scale), length of response and duration of complications (breathiness, cough, dysphagia and total voice loss). Injections were performed under electromyography (EMG) guidance. NPS scale was used to describe the EMG response. Dose and unilateral/bilateral injections were determined by clinical judgment based on previous response. Time intervals between injections were patient driven. Results Low dose unilateral Dysport injection was associated with no significant difference in the patient's outcome in terms of duration of action, voice score (VS) and complication rate when compared to bilateral injections. Unilateral injections were not associated with any post treatment total voice loss unlike the bilateral injections. Conclusion Unilateral low dose Dysport injections are recommended in the treatment of adductor spasmodic dysphonia. PMID:19852852

Upile, Tahwinder; Elmiyeh, Behrad; Jerjes, Waseem; Prasad, Vyas; Kafas, Panagiotis; Abiola, Jesuloba; Youl, Bryan; Epstein, Ruth; Hopper, Colin; Sudhoff, Holger; Rubin, John

2009-01-01

261

Fracture behavior across interfaces  

NASA Astrophysics Data System (ADS)

Faults and fracture networks at depth are important fluid pathways, especially in fine-grained, low permeability seal lithologies. Discontinues in sealing lithologies can create seal bypass systems, leading to the failure of CO2 geosequestration sites or hydrocarbon traps. We characterize the occurrence of and changes in discontinuity patterns and the associated changes in elastic moduli across sedimentologic interfaces to document the importance of these discontinuities for fluid management in the subsurface and potential for re-activation in high-pressure injection scenarios. We evaluate well-exposed, fine-grained, low-permeability Mesozoic and Paleozoic units that are seals of potential CO2 repositories on the Colorado Plateau and show evidence for open fractures and fluid flow in the subsurface. Field observations document changes in fracture distributions across lithologic boundaries allowing us to identify mechano-stratigraphic units and focus on the effect of lithologic interfaces on fracture distribution. An interface marks the boundary between facies in a seal and in this study the fractures are shown to deflect or arrest at the interface. In outcrop fracture intensity varies in from 1 to 18 fractures per meter and fracture apertures range from mm to cm. The mineralized fractures often have associated alteration halos along their boundaries; their general orientation follows that of discontinuities within the underlying reservoir facies or adjacent faults. The recognition of these changes in fracture distribution is important for forward modeling of fluid flow and risk management. Studying the occurrence of and changes in fracture patterns from outcrops and scaling it up for use in modeling at a field scale is difficult due to the lack of direct correlation between outcrop observations and subsurface data. Due to the size and amount of data needed to model fluid flow at the field scale the meso-scale (cm to m) variability of rock properties is often neglected. We evaluate this meso-scale variability in elastic moduli, where possible. We combine mechano-stratigraphic outcrop observations with elastic moduli calculated from publically available wire line log data to evaluate the variability in rock strength within the heterolithic top seal. Relationships between changes in Young's modulus to resulting fracture distribution can then be observed. The outcome of this analysis can be used for modeling the effectiveness of seal for storage of CO2 in the underlying reservoirs. Digitized publically available wire line well log data were used to calculate Poisson's ratio and Young's modulus over the Carmel Formation and upper most 3 m of the underlying Navajo Sandstone. Our calculations show that Young's Modulus can range between 15 to 34 GPa across 60 cm of the intra-seal interfaces, and an average difference of 5 GPa across the reservoir seal interface. These variations will affect fracture distributions and fluid behavior in the subsurface. These data provide a means to closely tie outcrop observations to derived estimates of subsurface rock strength. The characterization of rock strength variability is especially important for modeling the response of seals to increased pressure, due to CO2 injection, and will allow for better site screening and fluid management once injection projects are underway.

Petrie, E. S.; Evans, J. P.; Jeppson, T. N.

2011-12-01

262

Thrower's fracture of the humerus.  

PubMed

Thrower's fractures are spiral fractures of the humerus caused by forceful throwing of a ball. Although these fractures have been cited in the literature, little research exists regarding the significance of stress fractures and fatigue injuries that may precede these injuries. This article presents 3 cases of middle-aged recreational baseball pitchers who sustained mid to distal third spiral humerus fractures, reviews the biomechanics of a thrower's fracture, and provides a detailed review of the literature to help better understand this condition and guide treatment. PMID:25199425

Miller, Andrew; Dodson, Christopher C; Ilyas, Asif M

2014-10-01

263

Acid Fracture and Fracture Conductivity Study of Field Rock Samples  

E-print Network

Acid fracturing is a well stimulation strategy designed to increase the productivity of a producing well. The parameters of acid fracturing and the effects of acid interaction on specific rock samples can be studied experimentally. Acid injection...

Underwood, Jarrod

2013-11-15

264

Treatment of Clavicle Fractures  

PubMed Central

Summary Clavicle fractures are very common injuries in adults (2–5%) and children (10–15%) (1) and represent the 44–66% of all shoulder fractures (2). Despite the high frequency the choice of proper treatment is still a challenge for the orthopedic surgeon. With this review we wants to focus the attention on the basic epidemiology, anatomy, classification, evaluation and management of surgical treatments in relationship with the gravity of injuries. Both conservative and surgical management are possible, and surgeons must choose the most appropriate management modality according to the biologic age, functional demands, and type of lesion. We performed a review of the English literature thought PubMed to produce an evidence-based review of current concept and management of clavicle fracture. We finished taking a comparison with our survey in order to underline our direct experience. PMID:23905044

Paladini, P; Pellegrini, A; Merolla, G; Campi, F; Porcellini, G

2012-01-01

265

Fracking, fracture, and permeability  

NASA Astrophysics Data System (ADS)

Injections of large volumes of water into tight shale reservoirs allows the extraction of oil and gas not previously accessible. This large volume 'super' fracking induces damage that allows the oil and/or gas to flow to an extraction well. The purpose of this paper is to provide a model for understanding super fracking. We assume that water is injected from a small spherical cavity into a homogeneous elastic medium. The high pressure of the injected water generates hoop stresses that reactivate natural fractures in the tight shales. These fractures migrate outward as water is added creating a spherical shell of damaged rock. The porosity associated with these fractures is equal to the water volume injected. We obtain an analytic expression for this volume. We apply our model to a typical tight shale reservoir and show that the predicted water volumes are in good agreement with the volumes used in super fracking.

Turcotte, D. L.; Norris, J.; Rundle, J. B.

2013-12-01

266

Talar neck fractures.  

PubMed

Clinical management of talar neck fractures is complex and fraught with complications. As Gaius Julius Caesar stated: "The die is cast"; often the outcome of a talar neck fracture is determined at the time of injury. The authors believe, however, that better results can be achieved by following some simple guidelines. The authors advocate prompt and precise anatomic surgical reduction, preferring the medial approach with secondary anterolateral approach. Preservation of blood supply can be achieved by a thorough understanding of vascular pathways and efforts to stay within appropriate surgical intervals. The authors advocate bone grafting of medial neck comminution (if present) to prevent varus malalignment and rigid internal fixation to allow for joint mobilization postoperatively. These guidelines may seem simple, but when dealing with the complexity of talar neck fractures, the foot and ankle surgeon needs to focus and rely on easily grasped concepts to reduce poor outcomes. PMID:11465133

Berlet, G C; Lee, T H; Massa, E G

2001-01-01

267

Does unilateral utricular dysfunction cause horizontal spontaneous nystagmus?  

PubMed

The presence of spontaneous nystagmus in darkness with a strong horizontal component has been taken to indicate that there is asymmetrical function of the horizontal semicircular canals. If this horizontal spontaneous nystagmus can be suppressed by vision, then it is regarded as due to peripheral horizontal canal dysfunction. However, we report evidence from one patient (61-year-old male), who visited the MSA ENT Clinic, Cassino (FR) Italy, reporting acute, severe vertigo, postural unsteadiness, nausea and vomiting associated with right sudden hearing loss. The patient received instrumental audiovestibular testing to obtain objective measurements of his inner-ear receptors. At the time of the attack, the patient showed spontaneous nystagmus, mainly with horizontal and vertical components (3D infrared video-oculography). Video head-impulse tests of dynamic horizontal canal function showed that the functional status of both horizontal canals was within the normal range. Cervical VEMPs to 500 Hz bone-conducted vibration at Fz showed normal results; ocular VEMPs to the same stimulus showed a reduced n10 amplitude beneath the left eye, corresponding to the right ear. For this reason, the patient was diagnosed as having right unilateral selective utricular macula lesion due to labyrinthitis. There is considerable evidence of convergence of neural input from the otoliths onto horizontal canal neurons in the vestibular nuclei. The firing of such neurons could reflect either asymmetrical horizontal canal function or asymmetrical utricular function. The problem with this patient was not due to asymmetrical horizontal canal function, but only to asymmetrical utricular function, demonstrated by the results of the oVEMP test. PMID:22869020

Manzari, L; Burgess, A M; Curthoys, I S

2012-11-01

268

Delayed posttraumatic unilateral occipital epidural hygroma in early childhood.  

PubMed

An extremely rare case of posttraumatic epidural hygroma in the left occipital supratentorial and infratentorial region is reported. A year and five months old child was admitted to the Clinic of Neurosurgery with sustained occipital head injury. She presented with drowsiness and vomiting due to intracranial hypertension. Initial computed tomography scan revealed left-sided fracture of the squamous part of the occipital bone without associated traumatic changes to the brain. A second spiral computed tomography scan was obtained two days later because of persisting symptoms of increased intracranial pressure. It demonstrated a newly formed left-sided epidural hygroma adjacent to the skull fracture in the left supratentorial and infratentorial occipital region. The case is discussed with emphasis on the mechanism of formation of epidural hygroma and an attempt has been made to outline the major predisposing factors leading to the development of this traumatic disease. Necessity for computed tomography follow-up is pointed out in order to diagnose delayed posttraumatic hygromas. The recommended surgical approach should include craniotomy centered at the site of the epidural hygroma and obligatory dural elevation by means of traction sutures to eliminate the posttraumatic epidural cavity. PMID:21644408

Kehayov, Ivo I; Batakliev, Ivan V; Kitov, Borislav D; Dichev, Alexander D

2011-01-01

269

Comparison of ventilation and voice outcomes between unilateral laryngeal pacing and unilateral cordotomy for the treatment of bilateral vocal fold paralysis  

PubMed Central

Background/Aims Rehabilitation of the bilaterally paralyzed human larynx remains a complex clinical problem. Conventional treatment generally involves surgical enlargement of the compromised airway, but often with resultant dysphonia and risk of aspiration. In this retrospective study, we compared one such treatment, posterior cordotomy, against unilateral laryngeal pacing: reanimation of vocal fold opening by functional electrical stimulation of the posterior cricoarytenoid muscle. Methods Post-operative peak inspiratory flow (PIF) values and overall voice grade ratings were compared between the two surgical groups, and pre and post-operative PIF were compared within the pacing group. Results There were five patients in the unilateral pacing group and 12 patients in the unilateral cordotomy group. Within the pacing group, post-operative PIF values were significantly improved from pre-operative PIF values (p=0.04) without significant effect on voice (grade) (p=0.62). Within the pacing group, the mean post-operative PIF value was significantly higher than that in the cordotomy group (p=0.05). Also, the mean post-operative overall voice grade values in the pacing group were significantly lower (better) than that of cordotomy group (p=0.03). Conclusion Unilateral pacing appears to be an effective and superior treatment to posterior cordotomy with respect to post-operative ventilation and voice outcome measures. PMID:23736349

Li, Yike; Pearce, Elizabeth C.; Mainthia, Rajshri; Athavale, Sanjay M.; Dang, Jennifer; Ashmead, Daniel H; Garrett, C. Gaelyn; Rousseau, Bernard; Billante, Cheryl R.; Zealear, David L.

2013-01-01

270

Fractured Petroleum Reservoirs  

SciTech Connect

In this report the results of experiments of water injection in fractured porous media comprising a number of water-wet matrix blocks are reported for the first time. The blocks experience an advancing fracture-water level (FWL). Immersion-type experiments are performed for comparison; the dominant recovery mechanism changed from co-current to counter-current imbibition when the boundary conditions changed from advancing FWL to immersion-type. Single block experiments of co-current and counter-current imbibition was performed and co-current imbibition leads to more efficient recovery was found.

Firoozabadi, Dr. Abbas

2000-01-18

271

What Is Hydraulic Fracturing?  

NSDL National Science Digital Library

Hydraulic fracturing is a process used in nine out of 10 natural gas wells in the United States, where millions of gallons of water, sand and chemicals are pumped underground to break apart the rock and release the gas. Scientists are worried that the chemicals used in fracturing may pose a threat either underground or when waste fluids are handled and sometimes spilled on the surface. This poster presentation illustrates the under surface process of hydraulic fracking and the distribution flow to the market.

2012-01-01

272

Forced to Fracture  

NSDL National Science Digital Library

Students learn how forces affect the human skeletal system through fractures and why certain bones are more likely to break than others depending on their design and use in the body. They learn how engineers and doctors collaborate to design effective treatments with consideration for the location, fracture severity and patient age, as well as the use of biocompatible materials. Learning the lesson content prepares students for the associated activity in which they test small animal bones to failure and then design treatment repair plans.

National Science Foundation GK-12 and Research Experience for Teachers (RET) Programs,

273

Fracture characterization of multilayered reservoirs  

SciTech Connect

Fracture treatment optimization techniques have been developed using Long-Spaced-Digital-Sonic (LSDS) log, pumpin-flowback, mini-frac, and downhole treating pressure data. These analysis techniques have been successfully applied in massive hydraulic fracturing (MHF) of ''tight gas'' wells. Massive hydraulic fracture stimulations have been used to make many tight gas reservoirs commercially attractive. However, studies have shown that short highly conductive fractures are optimum for the successful stimulation of wells in moderate permeability reservoirs. As a result, the ability to design and place optimal fractures in these reservoirs is critical. This paper illustrates the application of fracture analysis techniques to a moderate permeability multi-layered reservoir. These techniques were used to identify large zonal variations in rock properties and pore pressure which result from the complex geology. The inclusion of geologic factors in fracture treatment design allowed the placement of short highly conductive fractures which were used to improve injectivity and vertical sweep, and therefore, ultimate recovery.

Britt, L.K.; Larsen, M.J.

1986-01-01

274

Fracture prediction in metal sheets  

E-print Network

One of the most important failure modes of thin-walled structures is fracture. Fracture is predominantly tensile in nature and, in most part, is operated by the physical mechanisms of void nucleation, growth, and linkage. ...

Lee, Young-Woong

2005-01-01

275

Fluid Flow Modeling in Fractures  

E-print Network

In this paper we study fluid flow in fractures using numerical simulation and address the challenging issue of hydraulic property characterization in fractures. The methodology is based on Computational Fluid Dynamics, ...

Sarkar, Sudipta

2004-01-01

276

Progressive Fracture of Composite Structures  

NASA Technical Reports Server (NTRS)

A new approach is described for evaluating fracture in composite structures. This approach is independent of classical fracture mechanics parameters like fracture toughness. It relies on computational simulation and is programmed in a stand-alone integrated computer code. It is multiscale, multifunctional because it includes composite mechanics for the composite behavior and finite element analysis for predicting the structural response. It contains seven modules; layered composite mechanics (micro, macro, laminate), finite element, updating scheme, local fracture, global fracture, stress based failure modes, and fracture progression. The computer code is called CODSTRAN (Composite Durability Structural ANalysis). It is used in the present paper to evaluate the global fracture of four composite shell problems and one composite built-up structure. Results show that the composite shells and the built-up composite structure global fracture are enhanced when internal pressure is combined with shear loads.

Chamis, Christos C.; Minnetyan, Levon

2008-01-01

277

Early diagnosis of vertebral fractures  

PubMed Central

Summary Vertebral fractures are a common clinical entity, caused by trauma or related to osteoporosis (benign). Their recognition is especially important in the post-menopausal female population but also important is their differentiation from pathological (malignant) fractures (1). A vertebral fracture is evidenced by vertebral body deformity or reduction in vertebral body height beyond a certain threshold value in the absence of bone discontinuity. For prognosis and treatment it is extremely important to recognize the cause of the fracture. In contrast to fractures that occur in other locations, vertebral fractures often go unrecognized in the acute phase as the pain may be transient and radiographic and evaluation of the spine may be difficult (2). Objective measurement of the vertebral deformity provides invaluable information to the interpreting physician and helps grade fracture severity. The recognition and diagnosis of vertebral fractures can be performed using additional diagnostic tools. PMID:23858304

Guglielmi, Giuseppe; di Chio, Francesca; Vergini, Maria Rita Delle; La Porta, Michele; Nasuto, Michelangelo; Di Primio, Luigia Anna

2013-01-01

278

Arthroscopic Treatment of Knee Fractures  

Microsoft Academic Search

Tibial plateau fractures can be a challenging injury to manage for orthopaedic surgeons. Management of these fractures has\\u000a evolved from immobilization, skeletal traction, open reduction, and internal fixation to (all) arthroscopic reduction and\\u000a internal fixation for some fracture types. Although not all fractures are amenable to arthroscopic reduction and fixation\\u000a techniques, the arthroscope is still an important instrument for intraarticular

S. L. Mortimer; Robert Hunter

279

Wormhole formation in dissolving fractures  

Microsoft Academic Search

We investigate the dissolution of artificial fractures with three-dimensional, pore-scale numerical simulations. The fluid velocity in the fracture space was determined from a lattice Boltzmann method, and a stochastic solver was used for the transport of dissolved species. Numerical simulations were used to study conditions under which long conduits (wormholes) form in an initially rough but spatially homogeneous fracture. The

P. Szymczak; A. J. C. Ladd

2009-01-01

280

Computer simulation of hydraulic fractures  

Microsoft Academic Search

We provide a brief historical background of the development of hydraulic fracturing models for use in the petroleum and other industries. We discuss scaling laws and the propagation regimes that control the growth of hydraulic fractures from the laboratory to the field scale. We introduce the mathematical equations and boundary conditions that govern the hydraulic fracturing process, and discuss numerical

J. Adachi; E. Siebrits; A. Peirce; J. Desroches

2007-01-01

281

Fractures in the Collegiate Athlete  

Microsoft Academic Search

Purpose: To determine the demographics and incidence of fractures in collegiate athletes.Study Design: Retrospective review of prospectively collected data.Methods: Division I collegiate athletes who sustained a fracture while enrolled at the university from 1986 to 2000 were identified through training room records. Type and location of fracture, sport, gender, age, position, height, and weight were recorded and analyzed. Team information

Sharon L. Hame; Jennifer M. LaFemina; David R. McAllister; Geoffrey W. Schaadt; Frederick J. Dorey

2004-01-01

282

Infiltration into Fractured Bedrock  

SciTech Connect

One potential consequence of global climate change and rapid changes in land use is an increased risk of flooding. Proper understanding of floodwater infiltration thus becomes a crucial component of our preparedness to meet the environmental challenges of projected climate change. In this paper, we present the results of a long-term infiltration experiment performed on fractured ash flow tuff. Water was released from a 3 x 4 m{sup 2} infiltration plot (divided into 12 square subplots) with a head of {approx}0.04 m, over a period of {approx}800 days. This experiment revealed peculiar infiltration patterns not amenable to current infiltration models, which were originally developed for infiltration into soils over a short duration. In particular, we observed that in part of the infiltration plot, the infiltration rate abruptly increased a few weeks into the infiltration tests. We suggest that these anomalies result from increases in fracture permeability during infiltration, which may be caused by swelling of clay fillings and/or erosion of infill debris. Interaction of the infiltration water with subsurface natural cavities (lithophysal cavities) could also contribute to such anomalies. This paper provides a conceptual model that partly describes the observed infiltration patterns in fractured rock and highlights some of the pitfalls associated with direct extension of soil infiltration models to fractured rock over a long period.

Salve, Rohit; Ghezzehei, Teamrat A.; Jones, Robert

2007-09-01

283

Cleavage and Fracture  

NSDL National Science Digital Library

In this activity, students will learn the properties of cleavage and fracture (how minerals break when struck with a hammer), and will use these properties as a diagnostic test for identifying minerals. Working in small groups, they will break a selection of specimens with a hammer, observe the results, and record their observations. A student worksheet and discussion questions are provided.

2005-10-06

284

Infiltration into fractured bedrock  

NASA Astrophysics Data System (ADS)

One potential consequence of global climate change and rapid changes in land use is an increased risk of flooding. Proper understanding of floodwater infiltration thus becomes a crucial component of our preparedness to meet the environmental challenges of projected climate change. In this paper, we present the results of a long-term infiltration experiment performed on fractured ash flow tuff. Water was released from a 3 × 4 m2 infiltration plot (divided into 12 square subplots) with a head of ˜0.04 m, over a period of ˜800 days. This experiment revealed peculiar infiltration patterns not amenable to current infiltration models, which were originally developed for infiltration into soils over a short duration. In particular, we observed that in part of the infiltration plot, the infiltration rate abruptly increased a few weeks into the infiltration tests. We suggest that these anomalies result from increases in fracture permeability during infiltration, which may be caused by swelling of clay fillings and/or erosion of infill debris. Interaction of the infiltration water with subsurface natural cavities (lithophysal cavities) could also contribute to such anomalies. This paper provides a conceptual model that partly describes the observed infiltration patterns in fractured rock and highlights some of the pitfalls associated with direct extension of soil infiltration models to fractured rock over a long period.

Salve, Rohit; Ghezzehei, Teamrat A.; Jones, Robert

2008-01-01

285

Fracturing highly disordered materials  

E-print Network

We investigate the role of disorder on the fracturing process of heterogeneous materials by means of a two-dimensional fuse network model. Our results in the extreme disorder limit reveal that the backbone of the fracture at collapse, namely the subset of the largest fracture that effectively halts the global current, has a fractal dimension of $1.22 \\pm 0.01$. This exponent value is compatible with the universality class of several other physical models, including optimal paths under strong disorder, disordered polymers, watersheds and optimal path cracks on uncorrelated substrates, hulls of explosive percolation clusters, and strands of invasion percolation fronts. Moreover, we find that the fractal dimension of the largest fracture under extreme disorder, $d_f=1.86 \\pm 0.01$, is outside the statistical error bar of standard percolation. This discrepancy is due to the appearance of trapped regions or cavities of all sizes that remain intact till the entire collapse of the fuse network, but are always access...

Moreira, A A; Hansen, A; Araujo, N A M; Herrmann, H J; Andrade, J S

2014-01-01

286

Injection through fractures  

SciTech Connect

Tracer tests are conducted in geothermal reservoirs as an aid in forecasting thermal breakthrough of reinjection water. To interpret tracer tests, mathematical models have been developed based on the various transport mechanisms in these highly fractured reservoirs. These tracer flow models have been applied to interpret field tests. The resulting matches between the model and field data were excellent and the model parameters were used to estimate reservoir properties. However, model fitting is an indirect process and the model's ability to estimate reservoir properties cannot be judged solely on the quality of the match between field data and model predictions. The model's accuracy in determining reservoir characteristics must be independently verified in a closely controlled environment. In this study, the closely controlled laboratory environment was chosen to test the validity and accuracy of tracer flow models developed specifically for flow in fractured rocks. The laboratory tracer tests were performed by flowing potassium iodide (KI) through artificially fractured core samples. The tracer test results were then analyzed with several models to determine which best fit the measured data. A Matrix Diffusion model was found to provide the best match of the tracer experiments. The core properties, as estimated by the Matrix Diffusion model parameters generated from the indirect matching process, were then determined. These calculated core parameters were compared to the measured core properties and were found to be in agreement. This verifies the use of the Matrix Diffusion flow model in estimating fracture widths from tracer tests.

Johns, R.A.

1987-05-01

287

Statistical Physics of Fracture  

SciTech Connect

Disorder and long-range interactions are two of the key components that make material failure an interesting playfield for the application of statistical mechanics. The cornerstone in this respect has been lattice models of the fracture in which a network of elastic beams, bonds, or electrical fuses with random failure thresholds are subject to an increasing external load. These models describe on a qualitative level the failure processes of real, brittle, or quasi-brittle materials. This has been particularly important in solving the classical engineering problems of material strength: the size dependence of maximum stress and its sample-to-sample statistical fluctuations. At the same time, lattice models pose many new fundamental questions in statistical physics, such as the relation between fracture and phase transitions. Experimental results point out to the existence of an intriguing crackling noise in the acoustic emission and of self-affine fractals in the crack surface morphology. Recent advances in computer power have enabled considerable progress in the understanding of such models. Among these partly still controversial issues, are the scaling and size-effects in material strength and accumulated damage, the statistics of avalanches or bursts of microfailures, and the morphology of the crack surface. Here we present an overview of the results obtained with lattice models for fracture, highlighting the relations with statistical physics theories and more conventional fracture mechanics approaches.

Alava, Mikko [Helsinki University of Technology, Helsinki, Finland; Nukala, Phani K [ORNL; Zapperi, Stefano [University of La Sapienza, Rome

2006-05-01

288

Fractures and sprains.  

PubMed

Everyone knows that some fractures in children have a great capacity for remodeling and require minimal care. Likewise, everyone knows that some growth-plate injuries have great potential for disaster. The skill comes in knowing which is which. PMID:3786013

Conrad, E U; Rang, M C

1986-12-01

289

Geriatric Fracture Center  

PubMed Central

Objective: Since April 1, 2008, patients aged ?65 years presenting with a hip fracture at Ziekenhuisgroep Twente, Almelo (ZGT-A), The Netherlands, have been admitted to the geriatric fracture center (GFC) and treated according to the multidisciplinary treatment approach. The objective of this study was to evaluate how implementation of the treatment approach has influenced the quality of care given to older patients with hip fracture. Design: Prospective cohort study with historical control group. Method: Two groups of patients with hip fracture were compared, 1 group was treated according to the new multidisciplinary treatment approach in 2009-2010, and the other group received the usual treatment in 2007-2008. The number of readmissions within 30 days after discharge was compared, and an analysis was carried out regarding the number of complications, the number of consultations with various specialists and with the geriatrician, and the duration of hospital stay. Results: In all, 140 patients from 2009 to 2010 group and 90 patients from 2007 to 2008 group were included. In 2009-2010 group, the number of readmissions within 30 days dropped by 11 percentage points (P = .001). The incidence of the number of complications decreased with a median of 1 compared with 2007-2008 (P = .017) group. Delirium was diagnosed to be 6 percentage points more frequent. The median number of consultations with various specialists per patient decreased by 1 percentage point as a result of geriatrician cotreatment (P = .002). The median duration of hospital stay was 1 day shorter than that in 2007-2008 group. Conclusion: The use of the multidisciplinary treatment approach led to a significant reduction in the number of readmissions within 30 days after discharge. It appears to be associated with improved short-term treatment outcomes for older patients with a hip fracture. PMID:23569698

Folbert, E. C. Ellis; Smit, Ruth S.; van der Velde, Detlef; Regtuijt, E. M. Marlies; Klaren, M. Hester; Hegeman, J. H. Han

2012-01-01

290

[Osteoporotic fractures of axial skeleton].  

PubMed

Osteoporotic fractures most frequently first occur in the axial skeleton, especially in the vertebral bodies of the thoracolumbar transition. Beside pain, these fractures cause increasing kyphosis leading to changes in statics and a shift of the bodies' center of gravity. This results in physiological, functional as well as neurological consequences that cannot be managed by means of a conservative therapy. The purpose of this article is to provide a brief overview on diagnostics and therapy of such fractures. Furthermore, fractures of the pubic rami need to be mentioned. They pose another frequent location for osteoporotic fractures and are also associated with a high rate of morbidity and mortality. PMID:22878945

Scheyerer, M J; Simmen, H-P; Wanner, G A; Werner, C M L

2012-08-01

291

Seismic Monitoring of Fracture Formation  

NASA Astrophysics Data System (ADS)

Seismically tracking fracture formation is an important step in the monitoring of subsurface sequestration reservoirs. In this paper we report on laboratory experiments that were performed to investigate seismic transmission across a slowly propagating fracture to monitor how fracture heterogeneity varied due to changing stress conditions. Experiments were performed on a cube of Pierre Blue limestone with dimensions 0.3 m by 0.3 m by 0.3 m in a tri-axial pressure machine consisting of three independent loading frames. Two seismic arrays were used to propagate compressional and shear waves through the sample prior to, during, and after fracturing. Each array was composed of sixteen piezoelectric transducers (eight compressional-mode and eight shear-mode) with a central frequency of 1 MHz. After the sample was removed from the triaxial frame, a laser profilometer was used to measure the geometry of the fracture surfaces. The seismic array data produced a time-dependent two-dimensional map of the propagating fracture tip and the resulting fracture. The transmitted signals showed a 5%-10% increase in amplitude as a precursor to the main fracturing event after which the transmitted energy decreased to 1%-15% of its original value. The observed increase in amplitude prior to major failure is caused by constructive interference from diffraction from the tip of the fracture before the fracture tip was even under the sensors. Numerical simulation shows that the precursory increase in amplitude is a function of the specific stiffness of the fracture tip and the frequency of the signal. Post-fracturing characterization of the fracture topology identified anisotropic features in the fracture aperture that correlated with the direction of fracture propagation observed in the seismic data. The seismic signal, combined with the fracture characterization, supports the hypothesis that seismic signals can provide specific information about fracture formation and the resulting fracture geometry. This work demonstrates the potential for developing seismic methods for characterizing time-dependent fracture formation and fracture properties. Acknowledgments: LJPN wishes to acknowledge the Geosciences Research Program, Office of Basic Energy Sciences US Department of Energy, the University Faculty Scholar program at Purdue University, and the Delft University of Technology

Pyrak-Nolte, L. J.; de Pater, C. J.; Jocker, J.

2005-12-01

292

Principles of osteoporotic fracture treatment.  

PubMed

The number of osteoporotic fractures is still increasing and the overall management of these multimorbid patients is demanding. Surgical management of these fractures is challenging due to often comminuted fractures and poor purchase of implants. New implants and some with add-on possibilities such as standardized cement augmentation have been developed to address these problems. With these technical innovations the overall patient outcome can be improved. This review describes general considerations in operative treatment of osteoporotic fractures and gives recommendations for a selection of frequent fracture types. PMID:24836334

Kammerlander, C; Erhart, S; Doshi, H; Gosch, M; Blauth, M

2013-12-01

293

Fracture of the clavicle does not affect arthritis of the ipsilateral acromioclavicular joint compared with the contralateral side: An osteological study.  

PubMed

In an osteological collection of 3100 specimens, 70 were found with unilateral clavicular fractures which were matched with 70 randomly selected normal specimens. This formed the basis of a study of the incidence of arthritis of the acromioclavicular joint and the effect of clavicular fracture on the development of arthritis in the ipsilateral acromioclavicular joint. This was graded visually on a severity scale of 0 to 3. The incidence of moderate to severe arthritis of the acromioclavicular joint in normal specimens was 77% (100 specimens). In those with a clavicular fracture, 66 of 70 (94%) had arthritis of the acromioclavicular joint, compared to 63 of 70 (90%) on the non-injured contralateral side (p = 0.35). Clavicles with shortening of 15 mm or less had no difference in the incidence of arthritis compared to those with shortening greater than 15 mm (p = 0.25). The location of the fracture had no effect on the development of arthritis. PMID:20044698

Chen, M R; Huang, J I; Victoroff, B N; Cooperman, D R

2010-01-01

294

Linear elastic fracture mechanics primer  

NASA Technical Reports Server (NTRS)

This primer is intended to remove the blackbox perception of fracture mechanics computer software by structural engineers. The fundamental concepts of linear elastic fracture mechanics are presented with emphasis on the practical application of fracture mechanics to real problems. Numerous rules of thumb are provided. Recommended texts for additional reading, and a discussion of the significance of fracture mechanics in structural design are given. Griffith's criterion for crack extension, Irwin's elastic stress field near the crack tip, and the influence of small-scale plasticity are discussed. Common stress intensities factor solutions and methods for determining them are included. Fracture toughness and subcritical crack growth are discussed. The application of fracture mechanics to damage tolerance and fracture control is discussed. Several example problems and a practice set of problems are given.

Wilson, Christopher D.

1992-01-01

295

Clavicle fractures in the newborn.  

PubMed

A retrospective review of 21,632 live births from January 1982 to July 1987 was performed to determine the incidence and risk factors associated with fractures of the clavicle in the newborn. Fifty-eight fractures (57 patients) were identified, for an incidence of 2.7 clavicle fractures per 1000 live births. Fractures of the clavicle were associated with heavy neonates and shoulder dystocia. Three patients had concurrent clavicular fractures and Erb's palsy. These findings suggest that the incidence of clavicle fractures in the newborn may be reduced by identifying the macrosomic fetus and by minimizing shoulder dystocia. When clavicle fractures occur, a brachial plexus injury should be ruled out. PMID:2293927

Oppenheim, W L; Davis, A; Growdon, W A; Dorey, F J; Davlin, L B

1990-01-01

296

Linear elastic fracture mechanics primer  

NASA Astrophysics Data System (ADS)

This primer is intended to remove the blackbox perception of fracture mechanics computer software by structural engineers. The fundamental concepts of linear elastic fracture mechanics are presented with emphasis on the practical application of fracture mechanics to real problems. Numerous rules of thumb are provided. Recommended texts for additional reading, and a discussion of the significance of fracture mechanics in structural design are given. Griffith's criterion for crack extension, Irwin's elastic stress field near the crack tip, and the influence of small-scale plasticity are discussed. Common stress intensities factor solutions and methods for determining them are included. Fracture toughness and subcritical crack growth are discussed. The application of fracture mechanics to damage tolerance and fracture control is discussed. Several example problems and a practice set of problems are given.

Wilson, Christopher D.

1992-07-01

297

Prevention of Railroad Wheel Fracture  

NASA Astrophysics Data System (ADS)

Railroad wheel brittle fractures normally occur from the tips of thermal cracks originating in the tread or flange. Tensile stress that contributes to the fracture is produced by abnormal brake heating. In the US, there used to be a comparable number of derailments due to such brittle wheel fractures. In Japan, brake conditions have not been so severe, and maintenance has been moderate. Therefore, such fractures have not been a major concern in wheel damage. However, conditions such as load and speed of railroad vehicles have become more severe in recent years. Therefore, more precise evaluation of wheel strength and safety is necessary. On the other hand, recent developments in fracture mechanics and elastic-plastic finite element analysis enables us to understand the causes and processes of mechanical failure such as brittle fracture. This paper reports on the research on strength estimation and safety improvements, which are required to prevent the railroad wheel fractures.

Sakamoto, Haruo; Hirakawa, Kenji

298

Roentgenographic evidence for predominant left-sided location of unilateral pleural plaques.  

PubMed

The roentgenographic prevalence and anatomic distribution of pleural plaques were studied in the US Navy Asbestos Medical Surveillance Program population (105,064 individuals as of July 17, 1985). "Definite" or "probable" pleural plaques were noted in 4.4 percent of films. These were unilateral in 19.3 percent of roentgenograms with "definite" pleural plaque and 33.9 percent of films with "probable" pleural plaque. Unilateral findings were more often left-sided than right-sided; a ratio of 287:82 in the "definite" group and 625:287 in the "probable" group. Left-sided predominance of unilateral plaque is a consistent and unexplained epidemiologic finding that may provide clues to pleural pathogenesis following asbestos exposure. PMID:2721262

Withers, B F; Ducatman, A M; Yang, W N

1989-06-01

299

Causation of Permanent Unilateral and Mild Bilateral Hearing Loss in Children  

PubMed Central

Children with permanent unilateral or mild bilateral hearing loss have been a focus of concern by audiologists, educators, and physicians for at least 2 decades. These children are known to be at risk for psychoeducational difficulties. However, despite this concern, little has been learned about the causative factors of these hearing losses and how those factors might be contributing to child development. This review of known causes of permanent unilateral and mild bilateral hearing loss in children is meant to draw attention to the importance of the search for etiologic factors. That is, the identification of the hearing loss should not signal the end of the diagnostic process but, rather, the beginning of a search for causation. With the combined efforts of audiologists, otolaryngologists, pediatricians, geneticists, and other medical professionals, we may enhance our understanding of the primary causes of unilateral and mild bilateral hearing loss and, perhaps, create links between causative factors and psychosocial and psychoeducational outcomes. PMID:18270175

Tharpe, Anne Marie; Sladen, Douglas P.

2008-01-01

300

Thrombosis incidence in unilateral vs. simultaneous bilateral total knee arthroplasty with compression device prophylaxis.  

PubMed

This study compares the incidence of venous thromboembolic event (VTE) in 55 patients (110 knees) undergoing simultaneous bilateral TKA with 287 patients (287 knees) undergoing unilateral TKA using a mobile compression device as monotherapy prophylaxis in both groups. All patients were clinically evaluated 3months after surgery with symptomatic confirmed VTE as an endpoint. Deep venous thrombosis (DVT) was documented by duplex ultrasound and pulmonary embolism (PE) was documented by spiral CT. The simultaneous bilateral TKA group had 6 VTEs (10.9%) with 2 PEs (3.6%). The unilateral TKA group had 9 VTEs (3.1%), and 0 PE. Patients undergoing simultaneous bilateral TKA yielded more than twice the rate of VTE compared with patients undergoing unilateral TKA using a mobile compression device as sole thromboprophylactic modality. PMID:23142435

Levy, Yadin D; Hardwick, Mary E; Copp, Steven N; Rosen, Adam S; Colwell, Clifford W

2013-03-01

301

Early Intervention for Children With Unilateral and Mild Bilateral Degrees of Hearing Loss  

PubMed Central

Some children with unilateral hearing loss or mild bilateral hearing loss are at risk for developmental delays, educational difficulties, and other adverse effects. However, these children face several challenges in receiving services that can prevent such problems. Many do not meet existing eligibility requirements for early intervention services in their state. Information disseminated to professionals and parents often does not convey the significance of unilateral and mild bilateral hearing loss. Some professionals indicate that there are insufficient guidelines defining appropriate intervention services for these children. Factors that influence developmental outcomes in this population are not well understood, making it difficult to determine which children can benefit from intervention services. Additional data are needed about how to minimize or prevent adverse outcomes in these children. This article presents suggestions for intervention and future research that were developed by participants of the 2005 National Workshop on Mild and Unilateral Hearing Loss. PMID:18270177

Holstrum, W. June; Gaffney, Marcus; Gravel, Judith S.; Oyler, Robert F.; Ross, Danielle S.

2008-01-01

302

Controversial Issues in Kyphoplasty and Vertebroplasty in Osteoporotic Vertebral Fractures  

PubMed Central

Kyphoplasty (KP) and vertebroplasty (VP) have been successfully employed for many years for the treatment of osteoporotic vertebral fractures. The purpose of this review is to resolve the controversial issues raised by the two randomized trials that claimed no difference between VP and SHAM procedure. In particular we compare nonsurgical management (NSM) and KP and VP, in terms of clinical parameters (pain, disability, quality of life, and new fractures), cost-effectiveness, radiological variables (kyphosis correction and vertebral height restoration), and VP versus KP for cement extravasation and complications profile. Cement types and optimal filling are analyzed and technological innovations are presented. Finally unipedicular/bipedicular techniques are compared. Conclusion. VP and KP are superior to NSM in clinical and radiological parameters and probably more cost-effective. KP is superior to VP in sagittal balance improvement and cement leaking. Complications are rare but serious adverse events have been described, so caution should be exerted. Unilateral procedures should be pursued whenever feasible. Upcoming randomized trials (CEEP, OSTEO-6, STIC-2, and VERTOS IV) will provide the missing link. PMID:24724106

Papanastassiou, Ioannis D.; Filis, Andreas; Gerochristou, Maria A.; Vrionis, Frank D.

2014-01-01

303

[Fracture of the acetabulum].  

PubMed

Severe trauma of the acetabulum is uncommon in children. However, it must be remembered that these apparently benign lesions can be responsible for serious complications. In a group of 31 children under the age of 16 years presenting with such lesions, 12 already had an adult type skeleton. Amongst the remaining children, 15 presented with fractures or fracture-dislocations of the acetabulum and 4 presented with marginal avulsions of the acetabular ridge. Two epiphysiodeses of the Y cartilage were observed, one in a 2 year old child, revealed by acetabular dysplasia at the age of 8 years, and the other in a 10 year old child which did not have any serious consequences. Three of the 4 cases of marginal avulsion were complicated by intra-articular incarceration, 2 of which were initially missed. Secondary surgical treatment achieved good functional recovery, but left radiological sequelae in the form of coxa magna. PMID:3168095

Lechevallier, J; Durand, C; Fall, I

1988-01-01

304

Analysis of Sidewalk Fractures  

NSDL National Science Digital Library

Most people are familiar with Shel Silverstein's poem "Where the Sidewalk Ends", but do they know where and why sidewalks crack? It's a valid and worthy question, and this handy educational activity from Charles Onasch of Bowling Green State University explains just that. Here, students will learn to use fractures in sidewalks as an analog for natural outcrops and also learn how to make systematic observations of such fractures. This activity is offered as part of the "Teaching Structural Geology in the 21st Century" website maintained at Carleton College, and educators are welcome to use it in a variety of classroom settings. Visitors can read a brief summary of the activity, and then go on to download all of the necessary documentation related to the activity.

305

Melt fracture revisited  

SciTech Connect

In a previous paper the author and Demay advanced a model to explain the melt fracture instability observed when molten linear polymer melts are extruded in a capillary rheometer operating under the controlled condition that the inlet flow rate was held constant. The model postulated that the melts were a slightly compressible viscous fluid and allowed for slipping of the melt at the wall. The novel feature of that model was the use of an empirical switch law which governed the amount of wall slip. The model successfully accounted for the oscillatory behavior of the exit flow rate, typically referred to as the melt fracture instability, but did not simultaneously yield the fine scale spatial oscillations in the melt typically referred to as shark skin. In this note a new model is advanced which simultaneously explains the melt fracture instability and shark skin phenomena. The model postulates that the polymer is a slightly compressible linearly viscous fluid but assumes no slip boundary conditions at the capillary wall. In simple shear the shear stress {tau}and strain rate d are assumed to be related by d = F{tau} where F ranges between F{sub 2} and F{sub 1} > F{sub 2}. A strain rate dependent yield function is introduced and this function governs whether F evolves towards F{sub 2} or F{sub 1}. This model accounts for the empirical observation that at high shears polymers align and slide more easily than at low shears and explains both the melt fracture and shark skin phenomena.

Greenberg, J. M.

2003-07-16

306

Crosslinked fracturing fluids  

Microsoft Academic Search

A method is described of preparing a fracturing fluid of enhanced temperature stability comprising hydrating in an aqueous liquid having a pH in the range from about 4.0 to about 8.0 a hydrophilic polymer containing at least two hydroxyl groups positioned in the cis-form on adjacent carbon atoms or on carbon atoms in a 1,3 relationship. A sparingly soluble borate

Mondshine

1986-01-01

307

Relative Dating Via Fractures  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site]

This VIS image of the eastern part of the Tharsis region illustrates how fractures can be used in relative dating of a surface. The fractured materials on the right side of the image are embayed by younger volcanic flows originating to the west of the image. Note how the younger flows cover the ends of the fractures, and are not at all fractured themselves.

Image information: VIS instrument. Latitude 43.2, Longitude 269.4 East (90.6 West). 19 meter/pixel resolution.

Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

2005-01-01

308

Can bilateral bronchospasm be a sign of unilateral phrenic nerve palsy after supraclavicular brachial plexus block?  

PubMed

Ultrasound-guided peripheral nerve blocks facilitate ambulatory anesthesia for upper limb surgeries. Unilateral phrenic nerve blockade is a common complication after interscalene brachial plexus block, rather than the supraclavicular block. We report a case of severe respiratory distress and bilateral bronchospasm following ultrasound-guided supraclavicular brachial plexus block. Patient did not have clinical features of pneumothorax or drug allergy and was managed with oxygen therapy and salbutamol nebulization. Chest X-ray revealed elevated right hemidiaphragm confirming unilateral phrenic nerve paresis. PMID:22557755

Chaudhuri, Souvik; Gopalkrishna, Md; Paul, Cherish; Kundu, Ratul

2012-04-01

309

Earth horizontal axis rotational responses in patients with unilateral peripheral vestibular deficits  

NASA Technical Reports Server (NTRS)

The vestibulo-ocular reflex (VOR) of five patients with surgically confirmed unilateral peripheral vestibular lesions is evaluated. Testing used both earth vertical axis (EVA) and earth horizontal axis (EHA) yaw rotation. Results indicated that the patients had short VOR time constants, asymmetric responses to both EVA and EHA rotation, and normal EHA modulation components. These findings suggest that unilateral peripheral vestibular loss causes a shortened VOR time constant even with the addition of dynamic otolithic stimulation and causes an asymmetry in semicircular canal-ocular reflexes and one aspect of otolith-ocular reflexes.

Furman, Joseph M. R.; Kamerer, Donald B.; Wall, Conrad, III

1989-01-01

310

Fractured Craters on Ganymede  

NASA Technical Reports Server (NTRS)

Two highly fractured craters are visible in this high resolution image of Jupiter's moon, Ganymede. NASA's Galileo spacecraft imaged this region as it passed Ganymede during its second orbit through the Jovian system. North is to the top of the picture and the sun illuminates the surface from the southeast. The two craters in the center of the image lie in the ancient dark terrain of Marius Regio, at 40 degrees latitude and 201 degrees longitude, at the border of a region of bright grooved terrain known as Byblus Sulcus (the eastern portion of which is visible on the left of this image). Pervasive fracturing has occurred in this area that has completely disrupted these craters and destroyed their southern and western walls. Such intense fracturing has occurred over much of Ganymede's surface and has commonly destroyed older features. The image covers an area approximately 26 kilometers (16 miles) by 18 kilometers (11 miles) across at a resolution of 86 meters (287 feet) per picture element. The image was taken on September 6, 1996 by the solid state imaging (CCD) system on NASA's Galileo spacecraft.

The Jet Propulsion Laboratory, Pasadena, CA manages the Galileo mission for NASA's Office of Space Science, Washington, DC. JPL is an operating division of California Institute of Technology (Caltech).

This image and other images and data received from Galileo are posted on the World Wide Web, on the Galileo mission home page at URL http://galileo.jpl.nasa.gov.

1997-01-01

311

Three-dimensional finite element analysis of the prosthetic rehabilitation for unilateral maxillary defect after free flap reconstruction  

Microsoft Academic Search

Aims: The aim of this study was to evaluate the stress on the prostheses and abutment teeth in a unilateral maxillary defect with free flap reconstruction. Methods and Materials: A three-dimensional finite element model of the human unilateral maxillary defect was constructed. Prostheses after free flap reconstruction were established. The modelling and analytical processes were performed using the ANSYS technologies.

Jian Sun; Ting Jiao

2010-01-01

312

THE RELIABILITY OF 1- AND 3RM TESTS OF UNILATERAL STRENGTH IN TRAINED AND UNTRAINED MEN AND WOMEN  

Microsoft Academic Search

The purpose of this study was to determine the reliability of the 1- and 3RM tests for the modified unilateral squat. Thirty untrained (22 women, 8 men) and 22 trained (12 women, 10 men) subjects participated in the study. The trained group had a minimum of 1 year lower-body training experience but had not participated in unilateral training prior to

Kevin McCurdy; George A. Langford; Adam L. Cline; Micheal Doscher

313

Recovery of walking speed and symmetrical movement of the pelvis and lower extremity joints after unilateral THA  

Microsoft Academic Search

In 17 patients with unilateral hip disease who underwent total hip arthroplasty (THA), the gait was analyzed preoperatively and 1, 3, 6, and 12 months after unilateral THA using a Vicon system to assess the recovery of walking speed and symmetrical movement of the hip, knee, ankle, and pelvis.The walking speed of these patients reached that of normal Japanese persons

Hidenobu Miki; Nobuhiko Sugano; Keisuke Hagio; Takashi Nishii; Hideo Kawakami; Akihiro Kakimoto; Nobuo Nakamura; Hideki Yoshikawa

2004-01-01

314

Visual Field Function in School-Aged Children with Spastic Unilateral Cerebral Palsy Related to Different Patterns of Brain Damage  

ERIC Educational Resources Information Center

Aim: To relate visual field function to brain morphology in children with unilateral cerebral palsy (CP). Method: Visual field function was assessed using the confrontation technique and Goldmann perimetry in 29 children (15 males, 14 females; age range 7-17y, median age 11y) with unilateral CP classified at Gross Motor Function Classification…

Jacobson, Lena; Rydberg, Agneta; Eliasson, Ann-Christin; Kits, Annika; Flodmark, Olof

2010-01-01

315

Hand Function in Relation to Brain Lesions and Corticomotor-Projection Pattern in Children with Unilateral Cerebral Palsy  

ERIC Educational Resources Information Center

Aim: To investigate relationships between hand function, brain lesions, and corticomotor projections in children with unilateral cerebral palsy (CP). Method: The study included 17 children (nine males, eight females; mean age 11.4 [SD 2.4] range 7-16y), with unilateral CP at Gross Motor Function Classification System level I and Manual Ability…

Holmstrom, Linda; Vollmer, Brigitte; Tedroff, Kristina; Islam, Mominul; Persson, Jonas Ke; Kits, Annika; Forssberg, Hans; Eliasson, Ann-Christin

2010-01-01

316

Performance of Adults with Auditory Figure-Ground Disorders under Conditions of Unilateral and Bilateral Ear Occlusion.  

ERIC Educational Resources Information Center

The effects of unilateral and bilateral ear occlusion on auditory discrimination in background noise was tested among 36 adults with auditory figure-ground disorders and normal auditory discrimination ability. Results indicated that unilateral occlusion effectively eliminated the figure-ground disorder in most subjects. (Author/DB)

Hasbrouck, Jon M.

1987-01-01

317

FRACTURED PETROLEUM RESERVOIRS  

SciTech Connect

The four chapters that are described in this report cover a variety of subjects that not only give insight into the understanding of multiphase flow in fractured porous media, but they provide also major contribution towards the understanding of flow processes with in-situ phase formation. In the following, a summary of all the chapters will be provided. Chapter I addresses issues related to water injection in water-wet fractured porous media. There are two parts in this chapter. Part I covers extensive set of measurements for water injection in water-wet fractured porous media. Both single matrix block and multiple matrix blocks tests are covered. There are two major findings from these experiments: (1) co-current imbibition can be more efficient than counter-current imbibition due to lower residual oil saturation and higher oil mobility, and (2) tight fractured porous media can be more efficient than a permeable porous media when subjected to water injection. These findings are directly related to the type of tests one can perform in the laboratory and to decide on the fate of water injection in fractured reservoirs. Part II of Chapter I presents modeling of water injection in water-wet fractured media by modifying the Buckley-Leverett Theory. A major element of the new model is the multiplication of the transfer flux by the fractured saturation with a power of 1/2. This simple model can account for both co-current and counter-current imbibition and computationally it is very efficient. It can be orders of magnitude faster than a conventional dual-porosity model. Part II also presents the results of water injection tests in very tight rocks of some 0.01 md permeability. Oil recovery from water imbibition tests from such at tight rock can be as high as 25 percent. Chapter II discusses solution gas-drive for cold production from heavy-oil reservoirs. The impetus for this work is the study of new gas phase formation from in-situ process which can be significantly different from that of gas displacement processes. The work is of experimental nature and clarifies several misconceptions in the literature. Based on experimental results, it is established that the main reason for high efficiency of solution gas drive from heavy oil reservoirs is due to low gas mobility. Chapter III presents the concept of the alteration of porous media wettability from liquid-wetting to intermediate gas-wetting. The idea is novel and has not been introduced in the petroleum literature before. There are significant implications from such as proposal. The most direct application of intermediate gas wetting is wettability alteration around the wellbore. Such an alteration can significantly improve well deliverability in gas condensate reservoirs where gas well deliverability decreases below dewpoint pressure. Part I of Chapter III studies the effect of gravity, viscous forces, interfacial tension, and wettability on the critical condensate saturation and relative permeability of gas condensate systems. A simple phenomenological network model is used for this study, The theoretical results reveal that wettability significantly affects both the critical gas saturation and gas relative permeability. Gas relative permeability may increase ten times as contact angle is altered from 0{sup o} (strongly liquid wet) to 85{sup o} (intermediate gas-wetting). The results from the theoretical study motivated the experimental investigation described in Part II. In Part II we demonstrate that the wettability of porous media can be altered from liquid-wetting to gas-wetting. This part describes our attempt to find appropriate chemicals for wettability alteration of various substrates including rock matrix. Chapter IV provides a comprehensive treatment of molecular, pressure, and thermal diffusion and convection in porous media Basic theoretical analysis is presented using irreversible thermodynamics.

Abbas Firoozabadi

1999-06-11

318

Rock fracture image acquisition and analysis  

NASA Astrophysics Data System (ADS)

As a cooperation project between Sweden and China, this paper presents: rock fracture image acquisition and analysis. Rock fracture images are acquired by using UV light illumination and visible optical illumination. To present fracture network reasonable, we set up some models to characterize the network, based on the models, we used Best fit Ferret method to auto-determine fracture zone, then, through skeleton fractures to obtain endpoints, junctions, holes, particles, and branches. Based on the new parameters and a part of common parameters, the fracture network density, porosity, connectivity and complexities can be obtained, and the fracture network is characterized. In the following, we first present a basic consideration and basic parameters for fractures (Primary study of characteristics of rock fractures), then, set up a model for fracture network analysis (Fracture network analysis), consequently to use the model to analyze fracture network with different images (Two dimensional fracture network analysis based on slices), and finally give conclusions and suggestions.

Wang, W.; Zongpu, Jia; Chen, Liwan

2007-12-01

319

Innovations in the management of hip fractures.  

PubMed

Hip fractures include fractures of the head, neck, intertrochanteric, and subtrochanteric regions. Head fractures commonly accompany dislocations. Neck fractures and intertrochanteric fractures occur with greatest frequency in elderly patients with a low bone mineral density and are produced by low-energy mechanisms. Subtrochanteric fractures occur in a predominantly strong cortical osseous region that is exposed to large compressive stresses. Implants used to address these fractures must accommodate significant loads while the fractures consolidate. Complications secondary to hip fractures produce significant morbidity and include infection, nonunion, malunion, decubitus ulcers, fat emboli, deep venous thrombosis, pulmonary embolus, pneumonia, myocardial infarction, stroke, and death. PMID:12934739

Teasdall, Robert D; Webb, Lawrence X

2003-08-01

320

Repair of long bone fractures in cats  

Microsoft Academic Search

LONG bone fractures are common and account for 50 per cent of all feline fractures. They are usually caused by road traffic accidents, but may also result from falls, fights and gunshot wounds. Fractures of the hindquarters predominate, with reports of 73 per cent of fractures involving the hindlimbs, pelvis or sacrum. Although the broad principles of long bone fracture

Harry Scott

2005-01-01

321

Fracture analysis of optical fibers  

SciTech Connect

The fracture markings on glass optical fiber surfaces are quantitatively related to the strength and time under load. Knowledge of the fracture-initiating defects and the surrounding topography pinpoints the source of failure, aids in troubleshooting, and improves production procedures. It is shown that the techniques of fracture surface analysis help analyze in-service failures as well as improve fiber optic production control.

Mecholsky, J.J.

1980-01-01

322

Old nutcracker fracture of cuboid  

PubMed Central

Nutcracker fractures of the cuboid (compressed) are rare and often missed at an initial visit. We report a 21-year-old patient presented with a 9 months old cuboid fracture. He presented with a localized pain around his left foot. Radiograph revealed the shortening of the lateral column with old cuboid fracture. The lateral column of foot was reconstructed. The patient remained symptom-free and no radiographic evidence of recurrence was observed 1 year postsurgery. PMID:23798765

Yu, Guangrong; Yu, Tao; Yang, Yunfeng; Yuan, Feng

2013-01-01

323

Insufficiency fractures of the sacrum  

SciTech Connect

Insufficiency stress fractures may occur in the sacrum after radiation therapy or secondary to postmenopausal or steroid-induced osteoporosis. These fractures are often either overlooked or confused both clinically and radiographically with metastatic disease. Findings on plain films and conventional tomograms are often subtle. Radionuclide bone scans show a characteristic distribution of increased uptake. Computed tomography is the definitive technique for demonstrating the fractures.

Cooper, K.L.; Beabout, J.W.; Swee, R.G.

1985-07-01

324

Fractures of the radial head.  

PubMed

Most fractures of the radial head are stable undisplaced or minimally displaced partial fractures without an associated fracture of the elbow or forearm or ligament injury, where stiffness following non-operative management is the primary concern. Displaced unstable fractures of the radial head are usually associated with other fractures or ligament injuries, and restoration of radiocapitellar contact by reconstruction or prosthetic replacement of the fractured head is necessary to prevent subluxation or dislocation of the elbow and forearm. In fractures with three or fewer fragments (two articular fragments and the neck) and little or no metaphyseal comminution, open reduction and internal fixation may give good results. However, fragmented unstable fractures of the radial head are prone to early failure of fixation and nonunion when fixed. Excision of the radial head is associated with good long-term results, but in patients with instability of the elbow or forearm, prosthetic replacement is preferred. This review considers the characteristics of stable and unstable fractures of the radial head, as well as discussing the debatable aspects of management, in light of the current best evidence. PMID:23365021

Duckworth, A D; McQueen, M M; Ring, D

2013-02-01

325

Fracture model for cemented aggregates  

A mechanisms-based fracture model applicable to a broad class of cemented aggregates and, among them, plastic-bonded explosive (PBX) composites, is presented. The model is calibrated for PBX 9502 using the available experimental data under uniaxial compression and tension gathered at various strain rates and temperatures. We show that the model correctly captures inelastic stress-strain responses prior to the load peak and it predicts the post-critical macro-fracture processes, which result from the growth and coalescence of micro-cracks. In our approach, the fracture zone is embedded into elastic matrix and effectively weakens the material's strength along the plane of the dominant fracture.

Zubelewicz, Aleksander; Thompson, Darla G.; Ostoja-Starzewski, Martin; Ionita, Axinte; Shunk, Devin; Lewis, Matthew W.; Lawson, Joe C.; Kale, Sohan; Koric, Seid

2013-01-01

326

Unilateral Molariform Macrodont Mandibular Second Premolar: An Unusual Case Report in A Nonsyndromic Patient  

PubMed Central

Macrodontia is a rare dental anomaly that refers to teeth appears larger than normal. It can be generalized or isolated macrodontia. Isolated macrodontia involving premolar is very rare. This case report presents an unusual unilateral molarifrom macrodontia of mandibular second premolar. PMID:25177648

Chaurasia, Vishwajit Rampratap; Masamatti, Vinay Kumar; Tiwari, Samarth; Malik, Sidharath

2014-01-01

327

Unilateral High-Altitude Pulmonary Edema in a Subject with Right Pulmonary Artery Hypoplasia  

Microsoft Academic Search

High-altitude pulmonary edema (HAPE) is an uncommon type of non-cardio-genic, high-permeability pulmonary edema. The authors describe a case of unilateral, left-sided HAPE that occurred in a man with right pulmonary artery hypoplasia.

G. Fiorenzano; V. Rastelli; V. Greco; A. Di Stefano; M. Dottorini

1994-01-01

328

Use of the intraosseous screw for unilateral upper molar distalization and found well balanced occlusion  

Microsoft Academic Search

BACKGROUND: The aim of this study was to present a temporary anchorage device with intraosseous screw for unilateral molar distalization to make a space for the impacted premolar and to found well balanced occlusion in a case. CASE PRESENTATION: A 13-year-old male who have an impacted premolar is presented with skeletal Class I and dental Class 2 relationship. The screw

Ibrahim Erhan Gelgor; Ali Ihya Karaman; Tamer Buyukyilmaz

2006-01-01

329

The sympathetic nervous system in hypertension due to unilateral renal artery stenosis in man  

Microsoft Academic Search

The contribution of neurogenic mechanisms in maintaining hypertension was investigated in 13 patients with unilateral renal artery stenosis (twelve with normal, one with grossly elevated plasma renin levels) by determining the haemodynamic and hormonal responses to the centrally acting sympatholytic agent, clonidine. The same patients were studied after captopril to determine the dependency of their blood pressure on the direct

Jaspal S. Kooner; W. Stanley Peart; Christopher J. Mathias

1991-01-01

330

Gender Differences in Unilateral Spatial Neglect within 24 Hours of Ischemic Stroke  

ERIC Educational Resources Information Center

Hemispatial neglect is a common and disabling consequence of stroke. Previous reports examining the relationship between gender and the incidence of unilateral spatial neglect (USN) have included either a large numbers of patients with few neglect tests or small numbers of patients with multiple tests. To determine if USN was more common and/or…

Kleinman, Jonathan T.; Gottesman, Rebecca F.; Davis, Cameron; Newhart, Melissa; Heidler-Gary, Jennifer; Hillis, Argye E.

2008-01-01

331

Look over There! Unilateral Gaze Increases Geographical Memory of the 50 United States  

ERIC Educational Resources Information Center

Based on their specialized processing abilities, the left and right hemispheres of the brain may not contribute equally to recall of general world knowledge. US college students recalled the verbal names and spatial locations of the 50 US states while sustaining leftward or rightward unilateral gaze, a procedure that selectively activates the…

Propper, Ruth E.; Brunye, Tad T.; Christman, Stephen D.; Januszewskia, Ashley

2012-01-01

332

Controlled ovarian hyperstimulation and intrauterine insemination cycles in patients with unilateral tubal blockage diagnosed by hysterosalpingography  

PubMed Central

Background: Controlled ovarian hyperstimulation and intrauterine insemination (IUI) cycle is an ideal protocol for some subfertile patients. So, we decided to try this therapeutic protocol for the patients with unilateral tubal blockage diagnosed by hysterosalpingography (HSG). Objective: To evaluate the effect of unilateral tubal blockage diagnosed by HSG on cumulative pregnancy rate (CPR) of the stimulated IUI cycles. Materials and Methods: A cross-sectional analysis was performed between October 2006 and October 2009 in an academic reproductive endocrinology and infertility center. Two groups of patients undergoing stimulated IUI cycles were compared. Sixty-four infertile couples with unilateral tubal blockage diagnosed by HSG as the sole cause of infertility in the group (?), and two hundred couples with unexplained infertility in the group (II). The patients underwent 3 consecutive ovarian hyperstimulation (Clomiphen citrate and human menopausal gonadotropin) and IUI cycles. The main outcome measurements were the CPRs per patients for 3 consecutive stimulated IUI cycles. Results: Cycle characteristics were found to be homogenous between the both groups. CPRs were similar in group ? (26.6%) and group II (28%) (p=0.87; OR=1.075; 95% CI: 0.57 -2.28). Conclusion: Unilateral tubal blockage (diagnosed on HSG) has no effect on success rate of stimulated IUI cycles, so COH and IUI could be recommended as the initial therapeutic protocol in these patients.

Ebrahimi, Mahbod; Akbari Asbagh, Firoozeh; Ghaseminejad, Azizeh

2011-01-01

333

A Japanese patient with Kabuki syndrome and unilateral perisylvian cortical dysplasia  

Microsoft Academic Search

Kabuki syndrome is a rare multiple anomaly syndrome characterized by a peculiar face, skeletal and dermatoglyphic anomalies, postnatal growth retardation and mental retardation. We report a case of Kabuki syndrome with unilateral perisylvian cortical dysplasia. This two-year old boy was referred to our hospital at 3-months of age for his growth retardation and muscle hypotonia. Because of his peculiar face,

Seiichiro Yoshioka; Tomoyuki Takano; Kumiko Matsuwake; Tatsuyuki Sokoda; Yoshihiro Takeuchi

2011-01-01

334

The Course and Outcome of Unilateral Intracranial Arteriopathy in 79 Children with Ischaemic Stroke  

ERIC Educational Resources Information Center

Arteriopathies are the commonest cause of arterial ischaemic stroke (AIS) in children. Repeated vascular imaging in children with AIS demonstrated the existence of a "transient cerebral arteriopathy" (TCA), characterized by lenticulostriate infarction due to non-progressive unilateral arterial disease affecting the supraclinoid internal carotid…

Braun, K. P. J.; Bulder, M. M. M.; Chabrier, S.; Kirkham, F. J.; Uiterwaal, C. S. P.; Tardieu, M.; Sebire, G.

2009-01-01

335

Public Opinion on Foreign Policy: The Multilateral Public that Perceives Itself as Unilateral  

Microsoft Academic Search

Americans have a strong preference for multilateral for- eign policies over unilateral foreign policies. But do Americans know their own preferences? Data from a national survey show wide misper- ceptions of public opinion on foreign policy. While Americans strongly prefer multilateral policies, they overestimate public support for unilat- eral policies. For example, while only 23 percent of respondents agreed that

ALEXANDER TODOROV; ANESU N. MANDISODZA

2004-01-01

336

Stance stability with unilateral and bilateral light touch of an external stationary object.  

PubMed

Unilateral light fingertip touch of a stationary object has a significant stabilizing effect on postural sway during stance. The purpose of this study was to find out if this effect is enhanced by bilateral light touch of parallel stationary objects. The postural sway of 54 healthy subjects was tested in four stance conditions: no touch; unilateral left light touch of the left handle of a walker; unilateral right light touch of the right handle of the same walker; and bilateral light touch of the two handles. During testing, subjects stood blindfolded on two foam pads placed on the left and right force plates of the Tetrax balance system. Testing in each condition lasted 45 s and was executed twice in a random order. As expected, postural sway was significantly reduced by unilateral left or right light fingertip touch. It was significantly further decreased by bilateral light touch. In addition, light touch conditions were associated with a reduction in pressure fluctuations between the heel and forefoot of the same foot as well as those of the contralateral foot, with a concomitant increase in weight shift fluctuations between the two feet. The decrease in postural sway with bilateral light touch suggests cortical modulation of the bilateral touch inputs, with enhancement of the stabilizing response. PMID:16503584

Dickstein, Ruth

2005-12-01

337

Adaptation of gait initiation in children with unilateral idiopathic clubfoot following conservative treatment  

Microsoft Academic Search

Children with unilateral clubfoot (CF) treated conservatively have residual foot deformities and triceps surae m. atrophy. Using surface electromyography of tibialis anterior (TA), gastrocnemius (GA), and peroneus longus muscles, simultaneously with ground reaction forces recordings, the present work assesses the influence of this pathology on the gait initiation process. Ten children with CF and 10 healthy children were investigated. In

Ph. Wicart; J. Richardson; B. Maton

2006-01-01

338

Ocular Rotation Axes during Dynamic Bielschowsky Head-Tilt Testing in Unilateral Trochlear Nerve Palsy  

E-print Network

PURPOSE. To explain the positive Bielschowsky head-tilt (BHT) sign in unilateral trochlear nerve palsy (u (dynamic BHT). Three- dimensional eye movements were recorded with dual search coils. Normal data were of the covered paretic or unaffected eye during dynamic BHT are a direct consequence of the nasal deviation

Haslwanter, Thomas

339

Hypermetabolism in the ventrolateral thalamus in unilateral Parkinsonian resting tremor: a positron emission tomography study  

E-print Network

Hypermetabolism in the ventrolateral thalamus in unilateral Parkinsonian resting tremor: a positron a cerebral network including the thalamus. An imaging study was performed on eight PD patients with strictly:001) was found in the anterior ventrolateral nuclear group of the thalamus located contralateral to the tremor

340

Neglected Time: Impaired Temporal Perception of Multisecond Intervals in Unilateral Neglect  

Microsoft Academic Search

Recent neuroimaging and neuropsychological studies have suggested that the right hemisphere, particularly frontal regions, is important for the perception of the passage of time. We examined the ability to estimate durations of up to 60 sec in a group of eight patients with unilateral neglect. When estimating multisecond intervals, neglect patients grossly underestimated all durations. On average, healthy controls (HC)

James Danckert; Susanne Ferber; Carson Pun; Carol Broderick; Christopher Striemer; Sherry Rock; Dwight Stewart

2007-01-01

341

A simple, efficient tool for assessment of mice after unilateral cortex injury  

Microsoft Academic Search

A refined battery of neurological tests, SNAP (Simple Neuroassessment of Asymmetric Impairment), was developed and validated to efficiently assess neurological deficits induced in a mouse model of traumatic brain injury. Four to 7-month old mice were subjected to unilateral controlled cortical impact or sham injury (craniectomy only). Several behavioral tests (SNAP, beam walk, foot fault, and water maze) were used

Shirley B. Shelton; David B. Pettigrew; Alison D. Hermann; Weidong Zhou; Patrick M. Sullivan; Keith A. Crutcher; Kenneth I. Strauss

2008-01-01

342

Spatial Memory and Hippocampal Volume in Humans With Unilateral Vestibular Deafferentation  

E-print Network

Spatial Memory and Hippocampal Volume in Humans With Unilateral Vestibular Deafferentation Brandt1,3 ABSTRACT: Patients with acquired chronic bilateral vestibular loss were recently found to have that spatial memory and navigation also rely on vestibular input. In the present study 16 patients

Hamilton, Derek

343

Linear acceleration perception in the roll plane before and after unilateral vestibular neurectomy  

Microsoft Academic Search

The ability of 33 patients to perceive the direction, relative to the body long axis, of a linear acceleration vector acting in the coronal plane, rolltilt perception, was studied at various times, before and from 1 week to 6 months after unilateral, selective vestibular neurectomy for Meniere's disease, acoustic neuroma or intractable paroxysmal vertigo. The results of these patients were

M. J. Dai; I. S. Curthoys; G. M. Halmagyi

1989-01-01

344

Role of disengagement failure and attentional gradient in unilateral spatial neglect a  

E-print Network

-hemisphere-damaged stroke patients per- formed the standardized Behavioural-Inattention-Test battery for visual neglect subtest of the standardized Behavioral Inattention Test;13 BIT). While improvement was evident in bothRole of disengagement failure and attentional gradient in unilateral spatial neglect

Deouell, Leon Y.

345

Effects of unilateral isometric strength training on joint angle specificity and cross-training  

Microsoft Academic Search

The purpose of this study was to examine the effects of unilateral isometric leg extension strength training on the strength and integrated electromyogram (IEMG) of both the trained and untrained limbs at multiple joint angles. A training (TRN) group [nine women; mean (SD) age, 20(1) years] exercised for 6 weeks with isometric leg extensions at 80% of maximal isometric torque.

Joseph P. Weir; Terry J. Housh; Loree L. Weir; Glen O. Johnson

1995-01-01

346

Motor unit activation in unilateral and bilateral muscle contraction in man  

Microsoft Academic Search

The present study was undertaken to investigate the mechanism underlying the observation that the maximal voluntary strength of the two legs acting together or bilaterally in isometric leg extension was less than the summed unilateral (sum of the left and right legs tested separately) strength. Observations were made on this phenomenon under both isometric and concentric contraction conditions by testing

Anthony A Vandervoort

1980-01-01

347

Effects of unilateral voluntary and electromyostimulation training on muscular strength on the contralateral limb  

Microsoft Academic Search

This study investigated the effects of unilateral electromyostimulation (EMS) versus voluntary isometric strength (VIM) training on knee extension strength of the contralateral limb, a phenomenon termed cross education, in previously untrained healthy young adults. Subjects in EMS (n=10) and VIM (n=10) groups trained with 40 voluntary or evoked isometric knee extensions, at an intensity of 65% of maximum voluntary contraction

Shi Zhou; Andrew Oakman; Allan J Davie

2002-01-01

348

Strength-velocity relationship and fatiguability of unilateral versus bilateral arm extension  

Microsoft Academic Search

Summary  Strength-velocity relations and fatigue resistance in an arm bench press manoeuvre were compared between conditions of bilateral (BL, both arms acting together) and unilateral muscle contraction in 9 young men. BL and UL (sum of the 2 arms acting singly) strength was similar for isometric and slow isokinetic maximal voluntary contractions (MVC); at high velocities BL MVC declined more than

A. A. Vandervoort; D. G. Sale; J. R. Moroz

1987-01-01

349

Amplification Considerations for Children With Minimal or Mild Bilateral Hearing Loss and Unilateral Hearing Loss  

PubMed Central

Children with minimal or mild bilateral hearing loss and unilateral hearing loss are at higher risk for academic, speech-language, and social-emotional difficulties than their normal hearing peers. The choice to fit infants with moderate or greater degrees of bilateral hearing loss has been standard practice for most clinicians, but for those with minimal or mild bilateral hearing loss or unilateral hearing loss, the fitting of hearing technology must be based on limited data. Evidence does not yet exist to support all the management decisions that an audiologist must make upon identifying an infant with minimal or mild bilateral hearing loss or unilateral hearing loss. It is not yet known which children are at the greatest risk for educational problems nor is it known if the provision of early amplification in this population will help a child avoid later difficulties. Some of these considerations and current hearing technology options for children with minimal or mild bilateral hearing loss or unilateral hearing loss are reviewed in this article. PMID:18270178

McKay, Sarah; Gravel, Judith S.; Tharpe, Anne Marie

2008-01-01

350

Isolated Unilateral Paralysis of the Hypoglossal Nerve after Transoral Intubation for General Anesthesia  

Microsoft Academic Search

Hypoglossal nerve paralysis is a rare complication of endotracheal intubation for general anesthesia. Anesthesiologists should\\u000a be aware of the possible causes and should take extreme care to prevent nerve injuries and other complications. We present\\u000a a case of postoperative unilateral hypoglossal nerve palsy after general anesthesia for laparoscopic cholecystectomy.

Sung Jin Hong; Jin Young Lee

2009-01-01

351

Gaze Behaviour during Interception in Children with Spastic Unilateral Cerebral Palsy  

ERIC Educational Resources Information Center

Anticipatory gaze behaviour during interceptive movements was investigated in children with Spastic Unilateral Cerebral Palsy (SUCP), and related to the side of the intracerebral lesion. Five children with lesions of the right hemisphere (RHL) and five children with lesions of the left hemisphere (LHL) had to walk towards and intercept a ball that…

van Kampen, P. M.; Ledebt, A.; Smorenburg, A. R. P.; Vermeulen, R. J.; Kelder, M. E.; van der Kamp, J.; Savelsbergh, G. J. P.

2012-01-01

352

DIFFERENTIAL EFFECTS OF UNILATERAL LESIONS ON LANGUAGE PRODUCTION IN CHILDREN AND ADULTS  

E-print Network

of language production in brain-injured children and adults, using age- corrected z scores for multipleDIFFERENTIAL EFFECTS OF UNILATERAL LESIONS ON LANGUAGE PRODUCTION IN CHILDREN AND ADULTS Elizabeth of California, San Diego Please address all correspondence to Elizabeth Bates, Center for Research in Language

353

Vulvitis granulomatosa and unilateral hypertrophy of the vulva related to Crohn's disease: a case report.  

PubMed

We report the case of a patient with voluminous unilateral hypertrophy of vulvar labia and pseudocondylomata in the fossa navicularis associated with intestinal Crohn's disease. No fistulas were observed. The patient has had Crohn's disease for 8 years. Interrelationship of genital alterations and Crohn's disease are discussed. PMID:15547549

Günthert, Andreas R; Hinney, Bernd; Nesselhut, Kirsten; Hanf, Volker; Emons, Günter

2004-11-01

354

Sex Similarities in Verbal and Performance IQ Deficits Following Unilateral Cerebral Lesions.  

ERIC Educational Resources Information Center

Investigated whether men and women produced similar Verbal Intelligence Quotient (IQ) and Performance IQ patterns following unilateral cerebral lesions. No consistent evidence of Sex X Lesioned Hemisphere interactions was found. Differences in the lateralization effects between men and women were not reflected in direction or pattern but only in…

Herring, Sheldon; Reitan, Ralph M.

1986-01-01

355

Comparison of Unilateral versus Bilateral Kyphoplasty in Multiple Myeloma Patients and the Importance of Preoperative Planning  

PubMed Central

Study Design Retrospective comparative study and technical note. Purpose To determine if there is a difference in clinical and radiographic parameters between unilateral and bilateral kyphoplasty in a uniform cancer population and to stress the importance of preoperative planning. Overview of Literature While unipedicular kyphoplasty is gaining popularity, a few comparative studies have reported on superior kyphotic reduction with the bipedicular approach. Methods We reviewed 69 myeloma patients with 105 operated levels (51 levels were done bilaterally vs. 54 unilaterally). Pain reduction, height restoration, cement volume and complications were recorded up to three months postoperatively. A technical note to identify the skin entry point on the basis of the magnetic resonance imaging and fluoroscopy (lateral view) is being described. Results Both procedures resulted in significant pain reduction (5.4-5.6/10 points, p=0.8). There was significant height restoration after the operation (p<0.001), while there was no sustained difference between the procedures (p=0.5) up to three months postoperatively. More cement was injected in the bilateral group (4.1 mL vs. 4.9 mL, p=0.002); no difference in cement extravasation in the spinal canal was observed (p=0.5). Conclusions There was no difference in the clinical or radiological outcomes between the unilateral and bilateral approaches. Therefore, unilateral kyphoplasty may be performed whenever it is technically feasible and this may be determined preoperatively. PMID:24967037

Eleraky, Mohamed; Murtagh, Ryan; Kokkalis, Zinon T; Gerochristou, Maria; Vrionis, Frank D

2014-01-01

356

Unilateral deep brain stimulation of the internal globus pallidus alleviates tardive dyskinesia.  

PubMed

We describe a patient with fluspirilene-induced tardive dyskinesia of the choreiform oro-facial-laryngeal type resistant to various conservative approaches for 7 years who underwent deep brain stimulation of the internal pallidal globe. We found immediate and marked suppression of her perioral involuntary movements with unilateral stimulation at 60 Hz. PMID:15133825

Schrader, Christoph; Peschel, Thomas; Petermeyer, Michael; Dengler, Reinhard; Hellwig, Dieter

2004-05-01

357

Is Making Divorce Easier Bad for Children? The Long Run Implications of Unilateral Divorce  

Microsoft Academic Search

Most states in the U.S. allow for unilateral divorce, which increases the ease of divorce by not requiring the explicit consent of both partners. Such regulations have come under fire for their perceived negative consequences for marital stability and resulting child outcomes, but there is no evidence to date to support the contention that easier divorce regulations are actually bad

Jonathan Gruber

2000-01-01

358

Ocular parasitic diseases: a review on toxocariasis and diffuse unilateral subacute neuroretinitis.  

PubMed

Parasitic infections may damage various ocular tissues, thereby causing visual dysfunction. In 1950, Wilder described the first case in which larval forms of nematodal intestinal roundworms (Ascaridoidea: Ascaris, Toxocara, Ancylostoma, Necator, and Strongyloides) were implicated as a cause of intraocular disease. This review focuses on two disorders associated with parasitic infections: ocular toxocariasis and diffuse unilateral subacute neuroretinitis. PMID:20669882

Cortez, Rafael T; Ramirez, Gema; Collet, Lucienne; Giuliari, Gian Paolo

2011-01-01

359

Domain decomposition methods for problems of unilateral contact between elastic bodies with nonlinear Winkler covers  

E-print Network

In this paper we propose on continuous level a class of domain decomposition methods of Robin-Robin type to solve the problems of unilateral contact between elastic bodies with nonlinear Winkler covers. These methods are based on abstract nonstationary iterative algorithms for nonlinear variational equations in reflexive Banach spaces. We also provide numerical investigations of obtained methods using finite element approximations.

Ihor I. Prokopyshyn; Ivan I. Dyyak; Rostyslav M. Martynyak; Ivan A. Prokopyshyn

2012-11-30

360

Action Planning in Typically and Atypically Developing Children (Unilateral Cerebral Palsy)  

ERIC Educational Resources Information Center

In the present study, we investigated the development of action planning in children with unilateral Cerebral Palsy (CP, aged 3-6 years, n = 24) and an age matched control group. To investigate action planning, participants performed a sequential movement task. They had to grasp an object (a wooden play sword) and place the sword in a hole in a…

Craje, Celine; Aarts, Pauline; Nijhuis-van der Sanden, Maria; Steenbergen, Bert

2010-01-01

361

Robotic Unilateral and Bilateral Upper-Limb Movement Training for Stroke Survivors Afflicted by  

E-print Network

mirror image with symmetric movements of both arms, unilateral movement of the affected arm and standard survivors lose functions of the left or right side of their body. The robotic treatments being evaluated for chronic stroke survivors. Some have proposed that repetitive mirror symmetric bimanual movements mig

Rosen, Jacob

362

Three-dimensional knee joint contact forces during walking in unilateral transtibial amputees  

E-print Network

Three-dimensional knee joint contact forces during walking in unilateral transtibial amputees Anne 2014 Keywords: Biomechanics Locomotion Below-knee Forward dynamics Joint loading a b s t r a c knee joint relative to the residual leg and non-amputees, but the cause of this greater prevalence

363

Analysis of a unilateral contact problem taking into account adhesion and friction  

E-print Network

Analysis of a unilateral contact problem taking into account adhesion and friction Elena Bonetti) adhesion and of the friction are taken into account. We describe the adhesion phenomenon in terms conditions, and friction by a nonlocal Coulomb law. All the constraints on the internal variables as well

Rossi, Riccarda

364

Analysis of a unilateral contact problem taking into account adhesion and friction  

E-print Network

Analysis of a unilateral contact problem taking into account adhesion and friction Elena Bonetti) adhesion and of the friction are taken into account. We describe the adhesion phenomenon in terms conditions and the friction by a nonlocal Coulomb law. All the constraints on the internal variables as well

Rossi, Riccarda

365

Informational Masking and Spatial Hearing in Listeners with and without Unilateral Hearing Loss  

ERIC Educational Resources Information Center

Purpose: This study assessed selective listening for speech in individuals with and without unilateral hearing loss (UHL) and the potential relationship between spatial release from informational masking and localization ability in listeners with UHL. Method: Twelve adults with UHL and 12 normal-hearing controls completed a series of monaural and…

Rothpletz, Ann M.; Wightman, Frederic L.; Kistler, Doris J.

2012-01-01

366

Abnormal ultrasonic pattern in contralateral testes in patients with unilateral testicular cancer  

Microsoft Academic Search

Ultrasound examination and biopsy of the nonaffected testis was performed in 78 men with a unilateral testicular cancer. Each testis was measured in three planes and the volume was calculated using the formula of an ellipsoid. The ultrasonic texture of each testis was given a score ranging from 1 to 5 as follows: 1, very regular; 2, slightly irregular; 3,

S. Lenz; N. E. Skakkebæk; N. T. Hertel

1996-01-01

367

Body Posture Asymmetry Differences between Children with Mild Scoliosis and Children with Unilateral Cerebral Palsy  

PubMed Central

Patients with unilateral cerebral palsy (CP) often have impaired movement coordination, reduced between-limb synchronization, and less weight bearing on the affected side, which can affect the maintenance of an upright weight-bearing position and gait. This study evaluated whether the different postural patterns of children with unilateral CP could be statistically recognized using cluster analysis. Forty-five outpatients with unilateral CP (mean age, 9 years and 5 months) and 51 able-bodied children with mild scoliosis (mean age, 9?years and 2?months) were included. One observer performed moiré topography (MT) examinations using a CQ Electronic System (Poland) device. A weight distribution analysis on the base of support (BOS) between the body sides was performed simultaneously. A force plate dynamographic platform (PDM), ZEBRIS (Germany), with FootPrint software was used for these measurements. Cluster analysis revealed three groups: Cluster 1 (n = 71, 73.96%), Cluster 2 (n = 8, 8.33%), and Cluster 3 (n = 17, 17.71%). Based on the MT parameters (extracted using a data reduction technique), three typical asymmetrical postural patterns were described: (1) the postural pattern of children with mild scoliosis (SCOL), (2) the progravitational postural pattern (PGPP), and (3) the antigravitational pattern. Patterns two and three were identified in children with unilateral CP. PMID:24224163

Domagalska-Szopa, Ma?gorzata; Szopa, Andrzej

2013-01-01

368

Unilateral hypoplasia of the hemithorax causing “pseudoscoliosis” after lung irradiation in a child with Wilms' tumor  

Microsoft Academic Search

A child receiving unilateral pulmonary radiation therapy for metastatic Wilms' tumor in early childhood was noted to develop\\u000a gradually an asymmetrical thorax. This was clinically diagnosed as scoliosis but radiographs indicated pulmonary hypoplasia\\u000a as the true cause.

J. P. Kinsella; R. C. Brasch; A. A. Ablin

1985-01-01

369

Crossover iliofemoral bypass grafting for treatment of unilateral iliac atherosclerotic disease  

Microsoft Academic Search

Purpose: In patients with unilateral iliac disease, a less invasive procedure than aortobifemoral bypass grafting may be desirable, especially in poor-risk patients or when sexual dysfunction is feared. In these cases, femorofemoral (FF) bypass grafting is often proposed. Compared with FF bypass grafting, iliofemoral (IF) bypass grafting avoids bilateral exposure of the groins, which may reduce the risk of infection.

Jean-Olivier Defraigne; César Vazquez; Raymond Limet

1999-01-01

370

Contingent negative variation indicates phasic arousal for externally cued unilateral eye blink in human subjects  

Microsoft Academic Search

The contingent negative variation (CNV) as a slow cortical potential was used to investigate cortical processing of externally cued, voluntary unilateral eye blink. Probands blinked as a response within a modified two-stimulus reaction time paradigm. Reaction time and amplitudes of CNV were determined. The activity of the orbicularis oculi muscles (OO) was registered by surface electromyography (EMG). Probands who performed

Hans Strenge; Peter Kropp; Johanna Hoffmeister; Annapia Verri; Cristina Galli; Wolf-Dieter Gerber

1999-01-01

371

Correlation of electroretinographic and fluorescein angiographic findings in unilateral central retinal vein obstruction  

Microsoft Academic Search

• Background: In central retinal vein obstruction (CRVO), electroretinogram (ERG) abnormalities and extensive retinal capillary dropout (CD) in the fluorescein angiogram (FA) are good indicators of retinal ischemia. We retrospectively studied patients with unilateral CRVO and compared the ERG and FA results • Methods: Single white flash ERG, photopic ERG, scotopic ERG and flicker ERG were recordered in 30 cases

Yoshie Matsui; Osamu Katsumi; Mehul C. Mehta; Tatsuo Hirose

1994-01-01

372

Sex Differences in the Effects of Unilateral Brain Damage on Intelligence  

NASA Astrophysics Data System (ADS)

A sexual dimorphism in the functional asymmetry of the damaged human brain is reflected in a test-specific laterality effect in male but not in female patients. This sex difference explains some contradictions concerning the effects of unilateral brain damage on intelligence in studies in which the influence of sex was overlooked.

Inglis, James; Lawson, J. S.

1981-05-01

373

Friends and Enemies: Cognitive Bases for Preschool Children's Unilateral and Reciprocal Relationships.  

ERIC Educational Resources Information Center

Preschoolers named and gave reasons for liking/ disliking an actual best friend and an actual enemy. Questioning of parents and observation of subjects' free play were conducted to verify the existence of close, reciprocal friendships. Content analyses of subjects' responses revealed that different dimensions underlie unilateral and reciprocal…

Hayes, Donald S.; And Others

1980-01-01

374

Is motor perseveration in unilateral neglect ‘driven’ by the presence of neglected left-sided stimuli?  

Microsoft Academic Search

Unilateral spatial neglect refers to a difficulty in detecting or acting on information in a particular region of space. When asked to cross out stimuli distributed across a page, patients with neglect may miss many targets on the left. In addition, they have a tendency to return to, and re-mark, right-sided targets that they have already cancelled. A recent retrospective

Tom Manly; Karina Woldt; Peter Watson; Elizabeth Warburton

2002-01-01

375

AGE AT UNILATERAL ORCHIOPEXY: EFFECT ON HORMONE LEVELS AND SPERM COUNT IN ADULTHOOD  

Microsoft Academic Search

PurposeWe determined whether there are differences in hormone levels, such as inhibin B, follicle-stimulating hormone (FSH), luteinizing hormone and testosterone, and sperm density in men with a history of unilateral cryptorchidism as stratified by age at orchiopexy.

MICHAEL T. COUGHLIN; MARK F. BELLINGER; PETER A. LEE

1999-01-01

376

Mechanics of fluid-driven fracture growth in naturally fractured reservoirs with simple network geometries  

Microsoft Academic Search

A numerical model has been developed for fluid-driven opening mode fracture growth in a naturally fractured formation. The rock formation contains discrete deformable fractures, which are initially closed but conductive because of their preexisting apertures. Fluid flow that develops along fractures depends on fracture geometry defined by preexisting aperture distribution, offsets along a fracture path, and intersections of two or

Xi Zhang; Robert G. Jeffrey; Marc Thiercelin

2009-01-01

377

The significance of segmental fibular fractures in the management of associated tibial fractures  

Microsoft Academic Search

One hundred seventy-six patients with 179 tibial shaft fractures (between March 2003 and August 2007) with a minimum of 4 months follow up were retrospectively reviewed by the author. Twenty-nine of these fractures were found to have segmental fibular fractures. These 29 fractures were analysed and compared with the total of 179 tibial fractures. Segmental tibial fractures with and without

P. R. Ramasamy

2009-01-01

378

Long-term results of early condylar fracture correction: case report.  

PubMed

Condylar fractures in childhood occur frequently, often with minimal pain and discomfort and therefore the diagnosis is not made at the time of injury. Management may be surgical or non-surgical. Non-surgical therapy in children is the method of choice if the condyle can translate normally. In fact, there is an excellent chance of regeneration and continued normal development after fracture in growing patients. The purpose of this article is to describe the long-term clinical and radiological evaluation of a conservatively treated unilateral condylar fracture, a result of trauma, in a 6-year-old patient. In addition, she presented a congenitally missing lower incisor ipsilateral to the fracture and a class II malocclusion. She was treated with functional jaw orthopedics using a splint and an activator and subsequent orthodontic treatment with fixed appliances [J Orofac Orthop5 (2002) 429]. The remodeling process of the condylar head and neck is clearly observed in the panoramic radiographs of the 12-year follow-up records presented. PMID:19239483

Farronato, Giampietro; Grillo, Maria Elena; Giannini, Lucia; Farronato, Davide; Maspero, Cinzia

2009-06-01

379

Fracture toughness of materials  

SciTech Connect

Crack tip dislocation emission in bulk specimens have been measured in single crystal specimens and the measurements are well below the accepted theoretical values for dislocation emission. The image forces on a dislocation due to the presence of a semi-infinite crack are used to calculate the potential energy of the dislocation around the crack. Expressions for the radial and tangential forces and for slip and climb forces have been found. Crack tip deformation in Mode I and Mode II fractures on both {l brace}100{r brace} and {l brace}110{r brace} planes have been observed in crystals of LiF. The deformation is shown to nearly completely shield {l brace}110{r brace} plane cracks and prevent their propagation while deformation is less effective in shielding {l brace}100{r brace} plane cracks. The fracture toughness of MgO-partially-stabilized ZrO{sub 2} exhibiting transformation toughening been measured. The equations of linear elastic fracture mechanics have been self-consistantly formulated to include the residual displacement from the transformation wake. MgO single crystals were fatigued in plastic strain control at elevated temperatures. At high temperatures, dense bundles of dislocations were observed in transmission electron microscopy aligned perpendicular to the Burgers' vector directions. The thermodynamics of a superconducting second order phase transformation has been related to jumps in physical properties. A simple energy balance, without assuming an equation of state, is used to relate the rate of change of state variables to measurable physical properties. There are no preconceived assumptions about the superconducting mechanism.

Burns, S.J.

1988-01-01

380

Fatigue and fracture: Overview  

NASA Technical Reports Server (NTRS)

A brief overview of the status of the fatigue and fracture programs is given. The programs involve the development of appropriate analytic material behavior models for cyclic stress-strain-temperature-time/cyclic crack initiation, and cyclic crack propagation. The underlying thrust of these programs is the development and verification of workable engineering methods for the calculation, in advance of service, of the local cyclic stress-strain response at the critical life governing location in hot section compounds, and the resultant crack initiation and crack growth lifetimes.

Halford, G. R.

1984-01-01

381

Investigation of Created Fracture Geometry through Hydraulic Fracture Treatment Analysis  

E-print Network

fracture geometry illustrates that it is not possible to reach the full fracture geometry implied by microseismic given the finite amount of fluid and proppant that was pumped. The model does show however that the created geometry appears to be much larger...

Ahmed, Ibraheem 1987-

2012-11-30

382

Permeability damage to natural fractures caused by fracturing fluid polymers  

SciTech Connect

Formation damage studies using artificially fractured, low-permeability sandstone cores indicate that viscosified fracturing fluids can severely restrict gas flow through these types of narrow fractures. These studies were performed in support of the Department of Energy's Multiwell Experiment (MWX). Extensive geological and production evaluations at the MWX site indicate that the presence of a natural fracture system is largely responsible for unstimulated gas production. The laboratory formation damage studies were designed to examine changes in cracked core permeability to gas caused by fracturing fluid residues introduced into such narrow fractures during fluid leakoff. Polysaccharide polymers caused significant reduction (up to 95%) to gas flow through cracked cores. Polymer fracturing fluid gels used in this study included hydroxypropyl guar, hydroxyethyl cellulose, and xanthan gum. In contrast, polyacrylamide gels caused little or no reduction in gas flow through cracked cores after liquid cleanup. Other components of fracturing fluids (surfactants, breakers, etc.) caused less damage to gas flows. Other factors affecting gas flow through cracked cores were investigated, including the effects of net confining stress and non-Darcy flow parameters. Results are related to some of the problems observed during the stimulation program conducted for the MWX. 24 refs., 4 figs., 7 tabs.

Gall, B.L.; Sattler, A.R.; Maloney, D.R.; Raible, C.J.

1988-04-01

383

Paediatric maxillofacial fractures: their aetiological characters and fracture patterns  

Microsoft Academic Search

Objective: Paediatric maxillofacial fractures are not common and carry different clinical features when compared with adults. To clarify the differences of aetiology and patterns of fractures in paediatric patients, a clinical retrospective analysis was performed. Patients: One hundred seventy-four paediatric patients younger than 16 years of age treated in the First Department of Oral and Maxillofacial Surgery, Osaka University Dental

Seiji Iida; Tokuzo Matsuya

2002-01-01

384

Fracture resistance in carburizing steels. Part I: fracture toughness  

Microsoft Academic Search

Fracture toughness evaluations were made in carburized steels from near the surface of the case to depths approaching the core. The most noteworthy observations associated with these data are listed below: (1) In general, the fracture toughness is lowest near the case surface and increases as the core is approached. This relationship is primarily controlled by carbon content. (2) In

Y. E. Smith; D. E. Diesburg

1979-01-01

385

Usefulness of Contralateral Indirect Decompression through Minimally Invasive Unilateral Transforaminal Lumbar Interbody Fusion  

PubMed Central

Study Design Retrospective study. Purpose This study aims to investigate the clinical and radiological results of contralateral indirect decompression through minimally invasive unilateral transforaminal lumbar interbody fusion (MI-TLIF). Overview of Literature Several studies have proposed that blood loss and operation time could be reduced through a unilateral approach, although many surgeons have forecast that satisfactory foraminal decompression is difficult to achieve through a unilateral approach. Methods The study included 30 subjects who had undergone single-level MI-TLIF. Visual analogue scale (VAS) and Oswestry disability index (ODI) were analyzed for clinical assessment. Disc height, segmental lordosis, and lumbar lordosis angle were examined for radiological assessment. The degree of contralateral indirect decompression was evaluated through a comparative analysis, with a magnetic resonance imaging (MRI) performed preoperatively and at one year postoperatively. Results Intraoperative blood loss volume was 308.75 mL in the unilateral approach group (UAP), and 575.00 mL in the bilateral approach group (BAP), showing a statistically significant difference. Operation time was 139.50 minutes in the UAP group, and 189.00 minutes in the BAP group, exhibiting a statistically significant difference (p<0.05). On the other hand, no significant difference was found in VAS, ODI, disc height, lordosis angles and the degree of nerve decompression in the vertebral foramen, using MRI, between the two groups (p>0.05). Conclusions Satisfactory results were acquired with MI-TLIF conducted through the unilateral approach of contralateral indirect decompression, in alignment with the bilateral approach. Therefore, contralateral indirect decompression is thought to be a useful procedure in reducing the operation time and volume of blood loss. PMID:25187862

Yoo, Jae-Sung; Lee, Jun-Yeul

2014-01-01

386

Unilateral Prostate Cancer Cannot be Accurately Predicted in Low-Risk Patients  

SciTech Connect

Purpose: Hemiablative therapy (HAT) is increasing in popularity for treatment of patients with low-risk prostate cancer (PCa). The validity of this therapeutic modality, which exclusively treats PCa within a single prostate lobe, rests on accurate staging. We tested the accuracy of unilaterally unremarkable biopsy findings in cases of low-risk PCa patients who are potential candidates for HAT. Methods and Materials: The study population consisted of 243 men with clinical stage {<=}T2a, a prostate-specific antigen (PSA) concentration of <10 ng/ml, a biopsy-proven Gleason sum of {<=}6, and a maximum of 2 ipsilateral positive biopsy results out of 10 or more cores. All men underwent a radical prostatectomy, and pathology stage was used as the gold standard. Univariable and multivariable logistic regression models were tested for significant predictors of unilateral, organ-confined PCa. These predictors consisted of PSA, %fPSA (defined as the quotient of free [uncomplexed] PSA divided by the total PSA), clinical stage (T2a vs. T1c), gland volume, and number of positive biopsy cores (2 vs. 1). Results: Despite unilateral stage at biopsy, bilateral or even non-organ-confined PCa was reported in 64% of all patients. In multivariable analyses, no variable could clearly and independently predict the presence of unilateral PCa. This was reflected in an overall accuracy of 58% (95% confidence interval, 50.6-65.8%). Conclusions: Two-thirds of patients with unilateral low-risk PCa, confirmed by clinical stage and biopsy findings, have bilateral or non-organ-confined PCa at radical prostatectomy. This alarming finding questions the safety and validity of HAT.

Isbarn, Hendrik, E-mail: hendrikisbarn@gmail.co [Martiniclinic, Prostate Cancer Center Hamburg-Eppendorf, Hamburg (Germany); University Hospital Hamburg-Eppendorf, Department of Urology, Hamburg (Germany); Cancer Prognostics and Health Outcomes Unit, University of Montreal Health Center, Montreal, Quebec (Canada); Karakiewicz, Pierre I. [Cancer Prognostics and Health Outcomes Unit, University of Montreal Health Center, Montreal, Quebec (Canada); Vogel, Susanne [University Hospital Hamburg-Eppendorf, Department of Urology, Hamburg (Germany)

2010-07-01

387

Unilateral versus bilateral pedicle screw instrumentation for single-level minimally invasive transforaminal lumbar interbody fusion.  

PubMed

Minimally invasive transforaminal lumbar interbody fusion (MIS TLIF) has become an increasingly popular method of lumbar arthrodesis. However, there are few published studies comparing the clinical outcomes between unilateral and bilateral instrumented MIS TLIF. Sixty-five patients with degenerative lumbar spine disease were enrolled in this study. Thirty-one patients were randomized to the unilateral group and 34 to the bilateral group. Recorded demographic data included sex, age, preoperative diagnosis, and degenerated segment. Operative time, blood loss, hospital stay length, complication rates, and fusion rates were also evaluated. The Oswestry Disability Index (ODI) score and Visual Analog Scale (VAS) pain score data were obtained. All patients were asked to follow-up at 3 and 6 months after surgery, and once every 6 months thereafter. The mean follow-up was 26.6 months (range 18-36 months). The two groups were similar in sex, age, preoperative diagnosis, and operated level. The unilateral group had significantly shorter operative time, lower blood loss, and shorter hospital time than the bilateral group. The average postoperative ODI and VAS scores improved significantly in each group. No significant differences were found between the two groups in relation to ODI and VAS. All patients showed evidence of fusion at 12 months postoperatively. The total fusion rate, screw failure, and general complication rate were not significantly different. Results showed that single-level MIS TLIF with unilateral pedicle screw fixation would be sufficient in the management of preoperatively stable patients with lumbar degenerative disease. It seems that MIS TLIF with unilateral pedicle screw instrumentation is a better choice for single-level degenerative lumbar spine disease. PMID:24814852

Shen, Xiaolong; Zhang, Hailong; Gu, Xin; Gu, Guangfei; Zhou, Xu; He, Shisheng

2014-09-01

388

49 CFR 195.111 - Fracture propagation.  

Code of Federal Regulations, 2011 CFR

...2011-10-01 2011-10-01 false Fracture propagation. 195.111 Section 195... Design Requirements § 195.111 Fracture propagation. A carbon dioxide pipeline...be designed to mitigate the effects of fracture propagation. [Amdt....

2011-10-01

389

49 CFR 195.111 - Fracture propagation.  

Code of Federal Regulations, 2012 CFR

...2012-10-01 2012-10-01 false Fracture propagation. 195.111 Section 195... Design Requirements § 195.111 Fracture propagation. A carbon dioxide pipeline...be designed to mitigate the effects of fracture propagation. [Amdt....

2012-10-01

390

49 CFR 195.111 - Fracture propagation.  

Code of Federal Regulations, 2010 CFR

...2010-10-01 2010-10-01 false Fracture propagation. 195.111 Section 195... Design Requirements § 195.111 Fracture propagation. A carbon dioxide pipeline...be designed to mitigate the effects of fracture propagation. [Amdt....

2010-10-01

391

49 CFR 195.111 - Fracture propagation.  

Code of Federal Regulations, 2013 CFR

...2013-10-01 2013-10-01 false Fracture propagation. 195.111 Section 195... Design Requirements § 195.111 Fracture propagation. A carbon dioxide pipeline...be designed to mitigate the effects of fracture propagation. [Amdt....

2013-10-01

392

Pseudopathologic fracture of the femoral neck  

SciTech Connect

We have seen two cases of traumatic subcapital fractures of the femoral neck which resembled pathologic fractures on plain radiography. We have named this entity pseudopathologic fracture of the femoral neck and offer suggestions for why it occurs.

Pope, T.L. Jr.; Keats, T.E.; Goldner, R.; Stelling, C.B.; Logan, M.

1981-11-01

393

Thoracolumbar Spine Fractures in the Geriatric Fracture Center  

PubMed Central

Introduction: Thoracolumbar spine fractures are common osteoporotic fractures among elderly patients. Several studies suggest that these fractures can be treated successfully with a nonoperative management. The aim of this study is to evaluate the conservative treatment of elderly patients with a vertebral fracture. Methods: This study is a retrospective cohort study, which included all patients with an age of 65 years and older, who were diagnosed with a vertebral fracture and where therefore admitted to the Geriatric Fracture Center over a period of 2 years. Primary outcome was the level of functioning 6 weeks and 3 months after admission. Results: We included 106 patients with 143 vertebral fractures, of which 61 patients were evaluated after 3 months. In our population, 53% of the patients had a fracture involving both middle and anterior columns. The majority of the patients functioned sufficiently 6 weeks and 3 months after admission. Analysis showed that age <80 years is an independent predictor of a sufficient level of functioning after 6 weeks. Discussion: The nonoperative treatment of elderly patients with a vertebral fracture leads to a sufficient level of functioning 6 weeks and 3 months after admission. In our population, only age <80 years is an independent predictor for a sufficient level of functioning 6 weeks after admission. The level of functioning at 6 weeks predicts the level of functioning 3 months after admission. On comparison, the level of functioning after early ambulation is equal to the level of functioning after immobilization. Where immobilization may lead to complications, early ambulation was not associated with new complications or neurological damage. Based on these advantages, the treatment of elderly patients with a fracture involving both middle and anterior columns may be altered from immobilization to mobilization in the future.

Folbert, E. C.; Kraai, M.; Smit, R. S.; Hegeman, J. H.; van der Velde, D.

2014-01-01

394

Haemodynamically unstable pelvic fractures.  

PubMed

Bleeding pelvic fractures that result in haemodynamic instability have a reported mortality rate as high as 40%. Because of the extreme force needed to disrupt the pelvic ring, associated injuries are common and mortality is usually from uncontrolled haemorrhage from extra-pelvic sources. Identifying and controlling all sources of bleeding is a complex challenge and is best managed by a multi-disciplinary team, which include trauma surgeons, orthopaedic surgeons and interventional radiologists. Once the pelvis is identified as the major source of haemorrhage, component therapy reconstituting whole blood should be used and the pelvic region wrapped circumferentially with a sheet or pelvic binder. Patients at risk for arterial bleeding who continue to show haemodynamic instability despite resuscitative efforts should undergo immediate arteriography and embolisation of bleeding pelvic vessels. If this is unavailable or delayed, or the patient has other injuries (i.e., head, chest, intra-abdominal, long bone), external fixation and pelvic packing, performed concomitantly with other life-saving procedures, may be used to further reduce pelvic venous bleeding. If however, the patient remains haemodynamically labile without apparent source of blood loss, transcatheter angiographic embolisation should be attempted to locate and stop pelvic arterial bleeding. Institutional practice guidelines have been shown to reduce mortality and should be developed by all centres treating pelvic fractures. PMID:19371871

White, Christopher E; Hsu, Joseph R; Holcomb, John B

2009-10-01

395

Crosslinked fracturing fluids  

SciTech Connect

A method is described of preparing a fracturing fluid of enhanced temperature stability comprising hydrating in an aqueous liquid having a pH in the range from about 4.0 to about 8.0 a hydrophilic polymer containing at least two hydroxyl groups positioned in the cis-form on adjacent carbon atoms or on carbon atoms in a 1,3 relationship. A sparingly soluble borate is added to the aqueous liquid in an amount sufficient to provide sufficient boron to crosslink the polymer and to increase the thermal stability of the fracturing fluid. The sparingly soluble borate has at least five boron atoms per molecule and is selected from the group consisting of alkaline earth metal borates, alkali metal alkaline earth metal borates, and mixtures thereof, and controlling the time for crosslinking to occur by providing a pH of the aqueous liquid within the range from about 4.0 to about 10.0 before adding the borate thereto.

Mondshine, T.C.

1986-10-28

396

Osteoporosis, Fractures, and Diabetes  

PubMed Central

It is well established that osteoporosis and diabetes are prevalent diseases with significant associated morbidity and mortality. Patients with diabetes mellitus have an increased risk of bone fractures. In type 1 diabetes, the risk is increased by ?6 times and is due to low bone mass. Despite increased bone mineral density (BMD), in patients with type 2 diabetes the risk is increased (which is about twice the risk in the general population) due to the inferior quality of bone. Bone fragility in type 2 diabetes, which is not reflected by bone mineral density, depends on bone quality deterioration rather than bone mass reduction. Thus, surrogate markers and examination methods are needed to replace the insensitivity of BMD in assessing fracture risks of T2DM patients. One of these methods can be trabecular bone score. The aim of the paper is to present the present state of scientific knowledge about the osteoporosis risk in diabetic patient. The review also discusses the possibility of problematic using the study conclusions in real clinical practice. PMID:25050121

2014-01-01

397

Optimization of fracture treatment designs  

E-print Network

, water haulin, supervision, and testing costs; chemical charge; and other associated treatment costs. The fracture treatment costs, COSTtreat can be lumped into the following components: fluid costs, proppant costs, horsepower costs, non..., water haulin, supervision, and testing costs; chemical charge; and other associated treatment costs. The fracture treatment costs, COSTtreat can be lumped into the following components: fluid costs, proppant costs, horsepower costs, non...

Rueda, Jose Ignacio

2012-06-07

398

Fractured clavicle in the newborn  

MedlinePLUS

Fractured collar bone - newborn ... A fracture of a newborn's collar bone (clavicle) can occur during a difficult vaginal delivery. ... baby will hold it still against the side of the body. Lifting the ... develop where the bone is healing. This lump may be the only ...

399

Micromechanical fracture strength of silicon  

Microsoft Academic Search

In order to test the statistical influence of some process and micromachining parameters on the fracture strength of silicon microelements, arrays of identical microsized cantilever beams were bulk micromachined in single-crystalline silicon wafers. The beams were exposed to various surface treatments (diamond polishing with different grades, oxidization, stripping of oxide) in different combinations. The influence on fracture strength was investigated

Fredric Ericson; Jan-Åke Schweitz

1990-01-01

400

Computed tomography of stress fracture  

Microsoft Academic Search

An athletic young female developed gradual onset of pain in the right leg. Plain radiographs demonstrated solid periosteal reaction in the tibia compatible with stress fracture. She stopped sport activites but her pain continued. Follow-up radiographs of the tibia revealed changes suspicious for osteoid osteoma. Computed tomography (CT) scan demonstrated periosteal reaction, but in addition, lucent fracture lines in the

Matilda Murcia; Richard E. Brennan; Jack Edeiken

1982-01-01

401

Avulsion fractures of the pelvis  

Microsoft Academic Search

Avulsion fractures of the pelvic apophyses are seen infrequently but they show a consistent pattern in mechanism, patient's age, symptoms, physical findings, and roentgenographic appearance. Some disagree ment exists in the literature concerning the treatment of these fractures. This study indicates that early diag nosis and a carefully directed nonoperative treatment program will produce positive results for avulsion frac tures

Jeffrey N. Metzmaker; Arthur M. Pappas

1985-01-01

402

Inverse analyses in fracture mechanics  

Microsoft Academic Search

The present purpose is a survey of some engineering-oriented research results which may be representative of the main issues in the title subject. Some recent or current developments are pointed out in the growing area of fracture mechanics centered on the calibration of cohesive fracture models for quasi-brittle materials, by approaches which combine experimentation, experiment simulation and minimisation of the

G. Maier; M. Bocciarelli; G. Bolzon; R. Fedele

403

Avulsion fracture of the ischium  

Microsoft Academic Search

Avulsion of the ischial apophysis is well known to occur from puberty until final fusion at around 25 years of age. The mechanism of injury varies but is usually strenuous, resulting in a high rate of stretch or contraction of the hamstrings. Minimally displaced fractures have a good prognosis when managed non-operatively. Where the fracture separation is wide there is

J. R. Davis

1998-01-01

404

Fractures - Multiple Languages: MedlinePlus  

MedlinePLUS

... Multiple Languages Arabic (???????) Chinese - Traditional (????) French (français) Hindi (??????) Japanese (???) Korean (???) Russian ( ... of Arthritis and Musculoskeletal and Skin Diseases French (français) Bone Fractures Fractures osseuses - français (French) Bilingual PDF ...

405

Some Fundamental Mechanisms of Hydraulic Fracturing.  

E-print Network

??This dissertation focuses mainly on three topics: (1) mixed-mode branching and segmentation of hydraulic fractures in brittle materials, (2) hydraulic fracture propagation in particulate materials,… (more)

Wu, Ruiting

2006-01-01

406

Making the first fracture the last fracture: ASBMR task force report on secondary fracture prevention.  

PubMed

Fragility fractures are common, affecting almost one in two older women and one in three older men. Every fragility fracture signals increased risk of future fractures as well as risk of premature mortality. Despite the major health care impact worldwide, currently there are few systems in place to identify and "capture" individuals after a fragility fracture to ensure appropriate assessment and treatment (according to national guidelines) to reduce future fracture risk and adverse health outcomes. The Task Force reviewed the current evidence about different systematic interventional approaches, their logical background, as well as the medical and ethical rationale. This included reviewing the evidence supporting cost-effective interventions and developing a toolkit for reducing secondary fracture incidence. This report presents this evidence for cost-effective interventions versus the human and health care costs associated with the failure to address further fractures. In particular, it summarizes the evidence for various forms of Fracture Liaison Service as the most effective intervention for secondary fracture prevention. It also summarizes the evidence that certain interventions, particularly those based on patient and/or community-focused educational approaches, are consistently, if unexpectedly, ineffective. As an international group, representing 36 countries throughout Asia-Pacific, South America, Europe, and North America, the Task Force reviewed and summarized the international data on barriers encountered in implementing risk-reduction strategies. It presents the ethical imperatives for providing quality of care in osteoporosis management. As part of an implementation strategy, it describes both the quality improvement methods best suited to transforming care and the research questions that remain outstanding. The overarching outcome of the Task Force's work has been the provision of a rational background and the scientific evidence underpinning secondary fracture prevention and stresses the utility of one form or another of a Fracture Liaison Service in achieving those quality outcomes worldwide. © 2012 American Society for Bone and Mineral Research. PMID:22836222

Eisman, John A; Bogoch, Earl R; Dell, Rick; Harrington, J Timothy; McKinney, Ross E; McLellan, Alastair; Mitchell, Paul J; Silverman, Stuart; Singleton, Rick; Siris, Ethel

2012-10-01

407

Subtrochanteric fractures of the femur.  

PubMed

A consecutive series of 103 patients with a subtrochanteric fracture were prospectively studied. Ten patients were treated non-operatively, whilst the other 93 had operative treatment. The overall fixation failure rate was 12 per cent with a re-operation rate of 6 per cent by 1 year. There were six (8 per cent) failures of fixation for the 74 fractures treated with the sliding hip screw. No method of fracture classification was demonstrated to be of value in predicting either the choice of treatment or the risk of fracture healing complications. Either intramedullary nailing or extramedullary fixation with a dynamic hip screw appear to give the best results for subtrochanteric fractures. PMID:9205572

Parker, M J; Dutta, B K; Sivaji, C; Pryor, G A

1997-03-01

408

The Relationship Between Maximum Unilateral Squat Strength and Balance in Young Adult Men and Women  

PubMed Central

The purpose of this study was to determine the relationship between unilateral squat strength and measures of static balance to compare balance performance between the dominant and non-dominant leg. Seventeen apparently healthy men (mean mass 90.5 ± 20.9 kg and age 21.7 ± 1.8 yrs) and 25 women (mean mass 62.2 ± 14.5 kg and age 21.9 ± 1.3 yrs) completed the study. Weight bearing unilateral strength was measured with a 1RM modified unilateral squat on the dominant and non-dominant leg. The students completed the stork stand and wobble board tests to determine static balance on the dominant and non-dominant leg. Maximum time maintained in the stork stand position, on the ball of the foot with the uninvolved foot against the involved knee with hands on the hips, was recorded. Balance was measured with a 15 second wobble board test. No significant correlations were found between the measurements of unilateral balance and strength (r values ranged between -0.05 to 0.2) for the men and women. Time off balance was not significantly different between the subjects’ dominant (men 1.1 ± 0.4 s; women 0.3 ± 0.1 s) and non-dominant (men 0.9 ± 0.3 s; women 0.3 ± 0.1 s) leg for the wobble board. Similar results were found for the time balanced during the stork stand test on the dominant (men 26.4 ± 6.3 s; women 24.1 ± 5.6 s) and non-dominant (men 26.0 ± 5.7 s; women 21.3 ± 4.1 s) leg. The data indicate that static balance and strength is unrelated in young adult men and women and gains made in one variable after training may not be associated with a change in performance of the other variable. These results also suggest that differences in static balance performance between legs can not be determined by leg dominance. Similar research is needed to compare contralateral leg balance in populations who participate in work or sport activities requiring repetitive asymmetrical use. A better understanding of contralateral balance performance will help practitioners make evaluative decisions during the rehabilitation process. Key Points 1RM unilateral squat strength is unrelated to measures of unilateral static balance in young adult men and women Static balance is similar between the dominant and non-dominant leg in young adult men and women Side-to-side differences in balance warrant assessment and training to correct imbalances prior to participation in activities that present a high risk for injury. PMID:24260001

McCurdy, Kevin; Langford, George

2006-01-01

409

The retromandibular transparotid approach for reduction and rigid internal fixation using two locking miniplates in mandibular condylar neck fractures.  

PubMed

We evaluated the safety, efficacy, and morbidity associated with the treatment of displaced mandibular condylar neck fractures using a retromandibular transparotid approach to reduce and rigidly fix using two 2.0-mm locking miniplates. Our surgical inclusion criteria were: patient selection of open reduction and fixation, displaced unilateral condylar fractures with derangement of occlusion, and bilateral condylar fractures with an anterior open bite. The study group consisted of 19 patients who underwent surgery for 19 mandibular condylar neck fractures; patients were analyzed prospectively, with more than 6 months of follow-up, and were evaluated in terms of functional results, scar formation, postoperative complications, and stability of fixation. The results showed that functional occlusion identical to the preoperative condition and correct anatomical reduction of the condylar segments in centric occlusion, followed by immediate functional recovery, was achieved in all patients. No patient suffered from any major or permanent complication postoperatively, although there were two cases (11%) of temporary facial nerve palsy, which resolved completely within 3 months. Surgical scars were barely visible. The retromandibular transparotid approach with open reduction and rigid internal fixation for displaced condylar neck fractures of the mandible is a feasible and safe, minimally invasive surgical technique that provides reliable clinical results. PMID:24070772

Kanno, T; Sukegawa, S; Tatsumi, H; Nariai, Y; Ishibashi, H; Furuki, Y; Sekine, J

2014-02-01

410

Fatigue and fracture  

NASA Technical Reports Server (NTRS)

The effects of the load/temperature environment of the shuttle on the fatigue life of the body-flap were investigated by conducting real time and accelerated flight-by-flight tests up to 500 flights on coupons containing holes. On the fracture side, much is known about the sensitivity of the tensile strengths of composites to holes and other flaws, predominantly at room temperature. The effects of notches were assessed for graphite/polyimides at the expected temperature extremes of the body-flap: 117K (-250 F) to 589K (600 F). Results indicate that the shuttle temperature extremes may affect fatigue properties HTS/PMR-15. There is no significant effect of temperature on notch-strength. Tensile strengths for specimens with holes and slots are equal.

Illg, W.; Everett, R. A., Jr.

1979-01-01

411

Cerberus Fossae Fractures  

NASA Technical Reports Server (NTRS)

[figure removed for brevity, see original site]

Released 29 October 2003

The fractured surface of the Cerberus region southeast of the Elysium volcanoes provides an impressive example of the powerful tectonic forces that have shaped the region. Both the smooth lava plains and the mountains that poke through the lava are subject to the extensional forces that rip open the landscape. The fractures are radial to the Elysium complex, suggesting a relationship to the volcanic processes that have built it.

Image information: VIS instrument. Latitude 8.6, Longitude 160.6 East (199.4 West). 19 meter/pixel resolution.

Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time.

NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science, Washington, D.C. The Thermal Emission Imaging System (THEMIS) was developed by Arizona State University, Tempe, in collaboration with Raytheon Santa Barbara Remote Sensing. The THEMIS investigation is led by Dr. Philip Christensen at Arizona State University. Lockheed Martin Astronautics, Denver, is the prime contractor for the Odyssey project, and developed and built the orbiter. Mission operations are conducted jointly from Lockheed Martin and from JPL, a division of the California Institute of Technology in Pasadena.

2003-01-01

412

CT scan-evaluated outcome of pulsed electromagnetic fields in the treatment of acute scaphoid fractures: a randomised, multicentre, double-blind, placebo-controlled trial.  

PubMed

We hypothesised that the use of pulsed electromagnetic field (PEMF) bone growth stimulation in acute scaphoid fractures would significantly shorten the time to union and reduce the number of nonunions in a randomised, double-blind, placebo-controlled multicentre trial. A total of 102 patients (78 male, 24 female; mean age 35 years (18 to 77)) from five different medical centres with a unilateral undisplaced acute scaphoid fracture were randomly allocated to PEMF (n = 51) or placebo (n = 51) and assessed with regard to functional and radiological outcomes (multiplanar reconstructed CT scans) at 6, 9, 12, 24 and 52 weeks. The overall time to clinical and radiological healing did not differ significantly between the active PEMF group and the placebo group. We concluded that the addition of PEMF bone growth stimulation to the conservative treatment of acute scaphoid fractures does not accelerate bone healing. PMID:25086123

Hannemann, P F W; van Wezenbeek, M R; Kolkman, K A; Twiss, E L L; Berghmans, C H J; Dirven, P A M G M; Brink, P R G; Poeze, M

2014-08-01

413

Stress fractures and bone pain  

SciTech Connect

Stress fractures result from an unusual repetitive physical activity causing absorption of bone in excess of repair and bone formation. This leads to the weakening of the bone and subsequently to a fracture. It is a benign condition that if recognized in time does not need any treatment besides rest. However, if diagnosis is not made and physical activity continues it may result in severe injury to the bone and a frank fracture may result. Pain is the typical clinical feature and bone scintigraphy, being more sensitive than radiography, is done to establish early diagnosis. The presence of asymptomatic sites of abnormal bone uptake typical of stress fracture in which pain appeared only about 2 weeks after scintigraphy, drew the authors' attention to the question of how close is the relationship between stress fractures and bone pain. Sixty-four military recruits diagnosed as suffering from stress fracture were investigated in order to correlate sites with abnormal uptake of Tc-99m MDP on bone scintigraphy with sites of local pain. In 37 (58%) subjects multiple sites of abnormal uptake were recognised. Of 123 sites of abnormal uptake, 31 (25%) were asymptomatic. In three patients bone pain appeared at the site of the abnormal uptake two weeks after scintigraphy. Bone scintigraphy appears to be more sensitive than bone pain in the diagnosis of stress fractures. The osteoblastic activity which manifests itself by abnormal uptake appears in some cases earlier than the pain caused by the fracture. Present findings may suggest that under certain circumstances, in a population prone to stress fracture, bone scan should be considered as a screening method.

Groshar, D.; Even-Sapir, E.; Lam, M.; Israel, O.; Front, D.

1984-01-01

414

Pulsed Electromagnetic Fields in the treatment of fresh scaphoid fractures. A multicenter, prospective, double blind, placebo controlled, randomized trial  

PubMed Central

Background The scaphoid bone is the most commonly fractured of the carpal bones. In the Netherlands 90% of all carpal fractures is a fracture of the scaphoid bone. The scaphoid has an essential role in functionality of the wrist, acting as a pivot. Complications in healing can result in poor functional outcome. The scaphoid fracture is a troublesome fracture and failure of treatment can result in avascular necrosis (up to 40%), non-union (5-21%) and early osteo-arthritis (up to 32%) which may seriously impair wrist function. Impaired consolidation of scaphoid fractures results in longer immobilization and more days lost at work with significant psychosocial and financial consequences. Initially Pulsed Electromagnetic Fields was used in the treatment of tibial pseudoarthrosis and non-union. More recently there is evidence that physical forces can also be used in the treatment of fresh fractures, showing accelerated healing by 30% and 71% reduction in nonunion within 12 weeks after initiation of therapy. Until now no double blind randomized, placebo controlled trial has been conducted to investigate the effect of this treatment on the healing of fresh fractures of the scaphoid. Methods/Design This is a multi center, prospective, double blind, placebo controlled, randomized trial. Study population consists of all patients with unilateral acute scaphoid fracture. Pregnant women, patients having a life supporting implanted electronic device, patients with additional fractures of wrist, carpal or metacarpal bones and pre-existing impairment in wrist function are excluded. The scaphoid fracture is diagnosed by a combination of physical and radiographic examination (CT-scanning). Proven scaphoid fractures are treated with cast immobilization and a small Pulsed Electromagnetic Fields bone growth stimulating device placed on the cast. Half of the devices will be disabled at random in the factory. Study parameters are clinical consolidation, radiological consolidation evaluated by CT-scanning, functional status of the wrist, including assessment by means of the patient rated wrist evaluation (PRWE) questionnaire and quality of life using SF-36 health survey questionnaire. Primary endpoint is number of scaphoid unions at six weeks, secondary endpoints are time interval to clinical and radiological consolidation, number of non-unions, functional status at 52 weeks and non-adherence to the treatment protocol. Trial registration Netherlands Trial Register (NTR): NTR2064 PMID:21548951

2011-01-01

415

Expansion of sensorimotor cortical activation for unilateral hand motion during contralateral hand deafferentation.  

PubMed

Acute deprivation of unilateral sensory input rapidly enhances contralateral hand motor function, but the underlying mechanisms remain poorly understood. We herein used functional MRI to evaluate, in 14 healthy individuals, motor cortical activation for right finger motion before, during, and after sensory deprivation of left forearm induced by reversible, noninvasive ischemic nerve block (INB). Before INB, the motor task activated the left primary sensorimotor cortex (SM1) as expected. During INB, the volume of the left SM1 activation significantly increased, and, after INB, it returned to the pre-INB, baseline level. The effectiveness of the INB of the left forearm was ensured by confirming disappearance of the activation in right primary sensory cortex that is normally caused by tactile stimulation of the left index finger. These findings demonstrate that acute deafferentation of unilateral forearm causes rapid and reversible changes in the neural substrates for contralateral finger motion, mediated possibly by attenuation of transcallosal interhemispheric inhibition. PMID:24598772

Kurabe, Satoshi; Itoh, Kosuke; Matsuzawa, Hitoshi; Nakada, Tsutomu; Fujii, Yukihiko

2014-04-16

416

A case of chronic inflammatory demyelinating polyneuropathy presented with unilateral ptosis.  

PubMed

Chronic Inflammatory Demyelinating Polyneuropathy is an autoimmune disease with progressive and relapsing courses. The main clinical presentations are diffuse deep tendon hyporeflexia or areflexia and symmetric proximal-distal muscles weakness. Myasthenia gravis is also an immune mediated disease with fluctuating ocular and bulbar symptoms and sometimes weakness. Although both myasthenia gravis and chronic inflammatory demyelinating polyneuropathy are immune mediated disorders, clinical presentations are obviously different in the two diseases. Herein, we will report a case of chronic inflammatory demyelinating polyneuropathy who presented with isolated unilateral ptosis. Initially, the patient was managed as ocular type of myasthenia gravis, but after progression to general limb weakness and areflexia, the diagnosis of chronic inflammatory demyelinating polyneuropathy was made. Although unilateral ptosis is a typical feature of myasthenia gravis, it may be seen as the first presentation of chronic inflammatory demyelinating polyneuropathy as well which mimics myasthenia gravis disease. PMID:25250274

Izadi, Sadegh; Karamimagham, Sina; Poursadeghfard, Maryam

2014-01-01

417

Effects of unilateral deactivations of dorsolateral prefrontal cortex and anterior cingulate cortex on saccadic eye movements.  

PubMed

The dorsolateral prefrontal cortex (dlPFC) and anterior cingulate cortex (ACC) have both been implicated in the cognitive control of saccadic eye movements by single neuron recording studies in nonhuman primates and functional imaging studies in humans, but their relative roles remain unclear. Here, we reversibly deactivated either dlPFC or ACC subregions in macaque monkeys while the animals performed randomly interleaved pro- and antisaccades. In addition, we explored the whole-brain functional connectivity of these two regions by applying a seed-based resting-state functional MRI analysis in a separate cohort of monkeys. We found that unilateral dlPFC deactivation had stronger behavioral effects on saccades than unilateral ACC deactivation, and that the dlPFC displayed stronger functional connectivity with frontoparietal areas than the ACC. We suggest that the dlPFC plays a more prominent role in the preparation of pro- and antisaccades than the ACC. PMID:24285866

Koval, Michael J; Hutchison, R Matthew; Lomber, Stephen G; Everling, Stefan

2014-02-01

418

Does it take two to tango? Longitudinal effects of unilateral and bilateral integrative negotiation training.  

PubMed

This study assesses longitudinal effects of different training designs on joint negotiation performance. In so doing, the study experimentally compares (a) bilateral training of both the seller and the buyer within a dyad with both (b) a no-training control condition and 2 conditions with unilateral training of either (c) the buyer or (d) the seller. Moreover, underlying psychological mechanisms of the training effect are assessed. Results of the study with 360 participants reveal a significant overall training effect on negotiation outcomes that remains stable over time. Consistent with our hypotheses, unilateral negotiation training is only effective if the trained party is the seller, and it fails if the trained party is the buyer. Additional mediation analyses reveal exchange of priority-related information as a causal mechanism underlying these effects. PMID:23565895

Zerres, Alfred; Hüffmeier, Joachim; Freund, Philipp Alexander; Backhaus, Klaus; Hertel, Guido

2013-05-01

419

Neural interactions in unilateral colliculus and between bilateral colliculi modulate auditory signal processing  

PubMed Central

In the auditory pathway, the inferior colliculus (IC) is a major center for temporal and spectral integration of auditory information. There are widespread neural interactions in unilateral (one) IC and between bilateral (two) ICs that could modulate auditory signal processing such as the amplitude and frequency selectivity of IC neurons. These neural interactions are either inhibitory or excitatory, and are mostly mediated by ?-aminobutyric acid (GABA) and glutamate, respectively. However, the majority of interactions are inhibitory while excitatory interactions are in the minority. Such unbalanced properties between excitatory and inhibitory projections have an important role in the formation of unilateral auditory dominance and sound location, and the neural interaction in one IC and between two ICs provide an adjustable and plastic modulation pattern for auditory signal processing. PMID:23626523

Mei, Hui-Xian; Cheng, Liang; Chen, Qi-Cai

2013-01-01

420

Unilateral Open-Angle Glaucoma Associated with the Ipsilateral Nevus of Ota  

PubMed Central

The nevus of Ota also known as “congenital melanosis bulbi” and “oculodermal melanocytosis” is a blue-gray hyperpigmentation that occurs on the face and eyes. The sclera is involved in two-thirds of cases (causing an increased risk of glaucoma). Women are nearly five times more likely to be affected than men. It is rare among Caucasian people. The nevus of Ota is congenital or acquired. Most cases of the nevus of Ota are unilateral (90%), although pigmentation is present bilaterally in 5%–10%. Ocular abnormalities included pigmentation of the sclera, cornea, retina, and optic disc and cavernous hemangiomas of the optic disc, elevated intraocular pressure, glaucoma, and ocular melanoma. We reported an appearance of unilateral glaucoma in a Caucasian female patient with the acquired, ipsilateral nevus of Ota. PMID:23781367

2013-01-01

421

Unilateral ovarian and fallopian tube agenesis in an infertile patient with a normal uterus  

PubMed Central

Congenital agenesis of the unilateral adnexa is a condition that has rarely been described in the literature. The current study presents the case of a 26-year-old female who was admitted to the Department of Gynecology at the Women’s Hospital of Zhejiang University (Hangzhou, Zhejiang) for primary infertility. The patient was diagnosed with unilateral ovarian and fallopian tubal agenesis, without malformations of the uterus and urinary tract, during diagnostic laparoscopy and hysteroscopy. A literature review was conducted with the aim of determining the possible causes of these anomalies. However, the etiology of the adnexal anomaly remained unclear, although torsion or congenital defects were the most likely explanation. Therefore, the observations of the present study indicate that contralateral tubal pathologies may contribute to sterility. PMID:25120609

CHEN, BINGYA; YANG, CHUNBO; SAHEBALLY, ZAYD; JIN, HANGMEI

2014-01-01

422

Detection of Virgin Olive Oil Adulteration Using Low Field Unilateral NMR  

PubMed Central

The detection of adulteration in edible oils is a concern in the food industry, especially for the higher priced virgin olive oils. This article presents a low field unilateral nuclear magnetic resonance (NMR) method for the detection of the adulteration of virgin olive oil that can be performed through sealed bottles providing a non-destructive screening technique. Adulterations of an extra virgin olive oil with different percentages of sunflower oil and red palm oil were measured with a commercial unilateral instrument, the profile NMR-Mouse. The NMR signal was processed using a 2-dimensional Inverse Laplace transformation to analyze the transverse relaxation and self-diffusion behaviors of different oils. The obtained results demonstrated the feasibility of detecting adulterations of olive oil with percentages of at least 10% of sunflower and red palm oils. PMID:24469355

Xu, Zheng; Morris, Robert H.; Bencsik, Martin; Newton, Michael I.

2014-01-01

423

Unilateral Psoriasis in a Woman with Ipsilateral Post-Mastectomy Lymphedema  

PubMed Central

Psoriasis is a multi-factorial disease with various clinical manifestations. We present a case of unilateral psoriasis associated with ipsilateral lymphedema that developed after mastectomy for breast cancer. A 42-year-old Korean woman was referred to our clinic with a 1-month history of multiple erythematous scaly patches on the right arm, back, and breast and was diagnosed with psoriasis by a skin biopsy. Three years previously, she had been diagnosed with breast cancer (T1N2), underwent a right quadrantectomy and axillary lymph node dissection, and completed adjuvant chemotherapy followed by high-dose adjuvant radiotherapy. She had started rehabilitation therapy on the right arm for secondary lymphedema 30 months previously. Because of the long interval between radiation and psoriasis, we speculated that changes in the local milieu caused by the lymphedema might be a causative factor. We hereby report a rare case of unilateral psoriasis following post-mastectomy lymphedema. PMID:22346263

Kim, Minji; Jung, Jae Yoon; Na, Se Young; Na, Sun Jae; Lee, Jong Hee

2011-01-01

424

The Design of a Project to Assess Bilateral Versus Unilateral Hearing Aid Fitting  

PubMed Central

Binaural hearing provides advantages over monaural in several ways, particularly in difficult listening situations. For a person with bilateral hearing loss, the bilateral fitting of hearing aids thus seems like a natural choice. However, surprisingly few studies have been reported in which the additional benefit of bilateral versus unilateral hearing aid use has been investigated based on real-life experiences. Therefore, a project has been designed to address this issue and to find tools to identify people for whom the drawbacks would outweigh the advantages of bilateral fitting. A project following this design is likely to provide reliable evidence concerning differences in benefit between unilateral and bilateral fitting of hearing aids by evaluating correlations between entrance data and outcome measures and final preferences. PMID:18567594

Arlinger, Stig; Gatehouse, Stuart; Kiessling, Jürgen; Naylor, Graham; Verschuure, Hans; Wouters, Jan

2008-01-01

425

A surprising cause of unilateral nasal obstruction and epistaxis: nasal septal schwannoma  

PubMed Central

Schwannomas of the head and neck are the most common form of benign nerve sheath tumours, most commonly arising in the form of vestibular schwannomas. Schwannoma of the nasal cavity is an uncommon presentation of this pathology and specifically Schwannoma of the nasal septum is a rare presentation of this well understood disease process. We present the case of a 31-year-old Eastern European male who presented with unilateral nasal obstruction, congestion and epistaxis of 3 months duration. After imaging and biopsy, the diagnosis of nasal septal schwannoma was made on histological examination. This diagnosis of a unilateral nasal mass in a young man provides an opportunity to discuss the varied presentations of schwannoma as well as to examine to possible causes of nasal and septal masses in this demographic. PMID:24876404

Cadd, Brandon; Offiah, Curtis; Alusi, Ghassan

2014-01-01

426

Nonpharmacological prevention of osteoporotic fractures  

PubMed Central

Osteoporosis is a systemic, metabolic disease that can result in debilitating fractures. The lasting effects of vertebral and hip fractures can cause acute and chronic pain, deformity, and emotional distress. Research evidence and clinical experience have determined that weight bearing and strength training exercise, fall prevention efforts, hip protectors, and some alternative therapies may assist patients in avoiding the pervasive and lasting effects of osteoporotic fractures. Clinicians should consider the recommendations of nonpharmacological measures to assist patients at risk for experiencing the culminating event of this destructive disease. PMID:18044142

Kessenich, Cathy R

2007-01-01

427

Computed tomography of stress fracture  

SciTech Connect

An athletic young female developed gradual onset of pain in the right leg. Plain radiographs demonstrated solid periosteal reaction in the tibia compatible with stress fracture. She stopped sport activites but her pain continued. Follow-up radiographs of the tibia revealed changes suspicious for osteoid osteoma. Computed tomography (CT) scan demonstrated periosteal reaction, but in addition, lucent fracture lines in the tibial cortex were evident. CT obviated the need for more invasive diagnostic procedures in this patient. In selected cases CT may be useful to confirm the diagnosis of stress fracture when plain radiographic or routine tomographic studies are not diagnostic.

Murcia, M.; Brennan, R.E.; Edeiken, J.

1982-06-01

428

Computed tomography of stress fracture.  

PubMed

An athletic young female developed gradual onset of pain in the right leg. Plain radiographs demonstrated solid periosteal reaction in the tibia compatible with stress fracture. She stopped sport activities but her pain continued. Follow-up radiographs of the tibia revealed changes suspicious for osteoid osteoma. Computed tomography (CT) scan demonstrated periosteal reaction, but in addition, lucent fracture lines in the tibial cortex were evident. CT obviated the need for more invasive diagnostic procedures in this patient. In selected cases CT may be useful to confirm the diagnosis of stress fracture when plain radiographic or routine tomographic studies are not diagnostic. PMID:7112145

Murcia, M; Brennan, R E; Edeiken, J

1982-01-01

429

SURGERY VERSUS OBSERVATION FOR MANAGING OBSTRUCTIVE GRADE 3 TO 4 UNILATERAL HYDRONEPHROSIS: A REPORT FROM THE SOCIETY FOR FETAL UROLOGY  

Microsoft Academic Search

PurposeThe Society for Fetal Urology has undertaken the first multicenter prospective randomized study of high grade obstructive unilateral hydronephrosis to evaluate the natural history of untreated obstruction and compare it to the benefits of pyeloplasty.

Max Maizels; Patrick C. Cartwright; Sandra K. Fernbach; James J. Conway

1998-01-01

430

Surgical Repair of Patients With Tetralogy of Fallot and Unilateral Absence of Pulmonary Artery  

Microsoft Academic Search

Background. Patients with tetralogy of Fallot and unilateral absence of pulmonary artery are a high-risk group for whom there is no consensus on the correct approach to medical management. The purpose of this report is to review a 29-year experience in the treatment of those patients.Methods. Between May 1966 and February 1995, 2,511 patients underwent correction of tetralogy of Fallot

Gen-Cheng Zhang; Zeng-Wei Wang; Ren-Fu Zhang; Hun-Yu Zhu; Ding-Hua Yi

1997-01-01

431

Bronchoscopic Diagnosis of Asymptomatic Unilateral Pulmonary Vein Atresia in an Infant  

Microsoft Academic Search

An eight-month-old boy with findings of persistent left pulmonary basal infiltrate was diagnosed with congenital unilateral\\u000a pulmonary vein atresia by bronchoscopy. Cardiac catheterization documented slow left pulmonary venous return to atretic pulmonary\\u000a veins. Conservative treatment was chosen because the child was asymptomatic and corrective surgery or percutaneous intervention\\u000a was not technically possible. After a 3-year follow-up, the child still has

Cécile Tissot; Regula Corbelli; Yacine Aggoun; Maurice Beghetti; Eduardo da Cruz

2008-01-01

432

Unilateral or bilateral vagotomy induces ovulation in both ovaries of rats with polycystic ovarian syndrome  

PubMed Central

Background Injecting estradiol valerate (EV) to pre-pubertal or adult female rat results in effects similar to those observed in women with polycystic ovarian syndrome (PCOS). One of the mechanisms involved in PCOS development is the hyperactivity of the sympathetic nervous system. In EV-induced PCOS rats, the unilateral sectioning of the superior ovarian nerve (SON) restores ovulation of the innervated ovary. This suggests that, in addition to the sympathetic innervation, other neural mechanisms are involved in the development/maintenance of PCOS. The aims of present study were analyze if the vagus nerve is one of the neural pathways participating in PCOS development. Methods Ten-day old rats were injected with EV dissolved in corn oil. At 24-days of age sham-surgery, unilateral, or bilateral sectioning of the vagus nerve (vagotomy) was performed on these rats. The animals were sacrificed at 90–92 days of age, when they presented vaginal estrous preceded by a pro-estrus smear. Results In EV-induced PCOS rats, unilateral or bilateral vagotomy restored ovulation in both ovaries. Follicle-stimulating hormone (FSH) levels in PCOS rats with unilateral or bilateral vagotomy were lower than in control rats. Conclusions This result suggests that in EV-induced PCOS rats the vagus nerve is a neural pathway participating in maintaining PCOS. The vagus nerve innervates the ovaries directly and indirectly through its synapsis in the celiac-superior-mesenteric ganglion, where the somas of neurons originating in the SON are located. Then, it is possible that vagotomy effects in EV-induced PCOS rats may be explained as a lack of communication between the central nervous system and the ovaries. PMID:23866168

2013-01-01

433

Behavioral assessment of unilateral neglect: Study of the psychometric properties of the Catherine Bergego Scale  

Microsoft Academic Search

Azouvi P, Olivier S, de Montety G, Samuel C, Louis-Dreyfus A, Tesio L. Behavioral assessment of unilateral neglect: study of the psychometric properties of the Catherine Bergego Scale. Arch Phys Med Rehabil 2003;84:51-7. Objective: To assess the psychometric properties of a scale for spatial neglect in everyday life. Design: Validation study. Setting: A neurologic rehabilitation unit in a university hospital.

Philippe Azouvi; Sylvie Olivier; Godeleine de Montety; Christiane Samuel; Anne Louis-Dreyfus; Luigi Tesio

2003-01-01

434

Effects of unilateral brain damage on grip selection, coordination, and kinematics of ipsilesional prehension  

Microsoft Academic Search

To determine whether the left and right hemispheres play specific roles in goal-directed movements, prehension with the ipsilesional\\u000a hand was tested in patients with unilateral brain damage. The task required that subjects rotate the hand while reaching for\\u000a a bar that was presented in different orientations in the frontal plane, thus making high demands on visuospatial processing.\\u000a The grasped bar

J. Hermsdörfer; K. Laimgruber; G. Kerkhoff; N. Mai; G. Goldenberg

1999-01-01

435

Perceptual asymmetry for chimeric stimuli in children with early unilateral brain damage  

Microsoft Academic Search

The present study used a chimeric stimuli task to assess the magnitude of the left-hemispace bias in children with congenital unilateral brain damage (n=46) as compared to typically developing matched controls (n=46). As would be expected, controls exhibited a significant left-hemispace bias. In the presence of left hemisphere (LH) damage, the left-hemispace preference was found to be present, but attenuated,

Sunita Bava; Angela O. Ballantyne; Susanne J. May; Doris A. Trauner

2005-01-01

436

Unilateral occipital infarction: evaluation of the risks of developing bilateral loss of vision  

Microsoft Academic Search

Fifty-eight patients with a unilateral infarction in the superficial area supplied by a posterior cerebral artery were followed (mean: 39.6 months). Thirteen (22.4%) developed cortical blindness associated with a delayed contralateral occipital infarction. Advanced age, general vascular risk, a history of strokes, Sylvian border-zone extension of the initial infarct, and an absence of improvement of initial visual field defects were

J Bogousslavsky; F Regli; G van Melle

1983-01-01

437

Unilateral Glenoid Hypoplasia: A Case Report and Review of the Literature  

PubMed Central

Glenoid hypoplasia is a relatively rare alteration that in most cases involves the pectoral girdle in a bilateral and symmetrical manner. In general, glenoid hypoplasia is associated with skeletal changes such as hypoplasia of the humeral head or changes in the morphology of the acromion and of the coracoid. We describe a rare case of unilateral glenoid hypoplasia without instability and not involving humeral head. The patient was managed effectively with nonoperative measures that featured specific rehabilitation exercises for the shoulder. PMID:23198210

Suryawanshi, Ashish; Mittal, Amber; Dongre, Snehal; Kashyap, Neeti

2011-01-01

438

Common and uncommon adult unilateral renal masses other than renal cell carcinoma  

PubMed Central

Abstract Many different masses can involve the kidney other than the commonly encountered renal cell carcinoma (RCC). The purpose of this article is to review the characteristic clinical and imaging findings of common and uncommon masses that predominantly present unilaterally in the adult patient, other than RCC. Awareness of such lesions and knowing the clinical scenario is important for appropriate diagnosis and management, especially in a multidisciplinary care setting. PMID:22752221

Le, Ott; Roy, Anjali; Silverman, Paul M.; Kundra, Vikas

2012-01-01

439

Unilateral lower limb injury: Its long-term effects on quadriceps, hamstring, and plantarflexor muscle strength  

Microsoft Academic Search

Objective: To ascertain if long-term deficits in quadriceps, hamstring, and plantarflexor muscle strength remain after unilateral lower-limb musculoskeletal injury and to quantify whether improvements in performance continue once a subject concludes rehabilitation and returns to everyday activities. The relation between the size of decrement and limb dominance, type of injury, and time since injury was also considered.Design: Isometric and\\/or dynamic

Heather M. Holder-Powell; Olga M. Rutherford

1999-01-01

440

Unilateral Lower Limb Injury: Its Long-Term Effects on Quadriceps, Hamstring, and Plantarflexor Muscle Strength  

Microsoft Academic Search

Holder-Powell HM, Rutherford OM. Unilat- eral lower limb injury: its long-term effects on quadriceps, hamstring, and plantarflexor muscle strength. Arch Phys Med Rehabil 1999;80:717-720. Objective: To ascertain if long-term deficits in quadriceps, hamstring, and plantarflexor muscle strength remain after unilateral lower-limb musculoskeletal injury and to quantify whether improvements in performance continue once a subject concludes rehabilitation and returns to everyday

Heather M. Holder-Powell; Olga M. Rutherford

441

Acting alone: U.S. unilateral uses of force, military revolutions, and hegemonic stability theory  

E-print Network

explanations and are as follows: president?s approval rating, public 17 support for force, misery index, divided government, Republican or Democrat president, initiator, Cold War, rival, opponent regime type, and alliance. Chapter V In the fifth... force does not does not seem to be correlated with domestic factors, but rather, it is positively correlated with a target being a rival or being in an alliance. The decision to use unilateral force is positively correlated with an opponent...

Podliska, Bradley Florian

2009-06-02

442

Unilateral Variations in Upper Limb Arterial System: A Case Report with Literature Review  

PubMed Central

In a female cadaver unilateral variations were found in upper limb arterial system - as (1) high-up origin of ulnar artery at arm, (2) persistent prominent arteria nervii mediana or median artery, (3) common interosseous artery branching out of brachial artery. Literature review revealed these coexistent anomalies as the consequence of aberrant finalization of the path chosen by axis arterial network in embryonic life. PMID:24596751

Roy, Tanushree; Roy, Hironmoy; Ghosal (Sen), Tanwi; Begum, Shabana

2014-01-01

443

Unilateral striae distensae affecting the right axilla in a 16-year-old boy: brief report.  

PubMed

Striae distensae or stretch marks are a common skin condition that occurs frequently in association with adolescent growth spurts and pregnancy. They are characterized by linear symmetrical asymptomatic smooth bands of atrophic-appearing skin on the thighs, buttocks, and breasts in girls and on the shoulders, outer thighs, and lumbosacral areas in boys. We present a rare case of unilateral striae distensae affecting the right axilla in a 16-year-old boy. PMID:23072309

Alshaiji, Jasem M; Handler, Marc Z; Schwartzfarb, Elissa; Izakovic, Jan; Schachner, Lawrence A

2014-01-01

444

Computer Simulation of Multidimensional Bone Deformity Correction and Lengthening by Unilateral External Fixator  

Microsoft Academic Search

An Analytic and graphic model of a unilateral external fixator and bone system is presented to simulate and visualize the\\u000a pre-operative planning of three-dimensional adjustments of the fixator joints in osteotomy. An analytic model was developed\\u000a as a rigid body linkage system, and kinematic chain loop equations were utilized in the adjustment analysis to obtain the\\u000a necessary rotations and translations

Yoon Hyuk Kim

2003-01-01

445

Silent sinus syndrome as a recognised cause of unilateral painless enophthalmos.  

PubMed

An uncommon case of unilateral painless enophthalmos in a 44-year-old woman is presented. Despite the noticeable orbital asymmetry caused by enophthalmos, the patient has normal visual acuities in both eyes with unremarkable ophthalmic examination. Diagnosis of silent sinus syndrome was confirmed on the CT orbits and paranasal sinuses, showing complete opacification and atelectasis of the maxillary sinus. The patient achieved satisfactory improvements in her nasal symptom and facial appearance following functional endoscopic sinus surgery. PMID:24859556

Gan, Weh Loong

2014-01-01

446

Hypertension in Unilaterally Nephrectomized Rats Induced by Single–Kidney Transfection with Angiotensinogen cDNA  

Microsoft Academic Search

Plasmid expression vectors containing angiotensinogen (ATG) cDNA were complexed to cationic liposomes and injected into the renal artery of unilaterally nephrectomized rats to evaluate the effect of intrarenal ATG cDNA on arterial blood pressure and the renin–angiotensin system. Systolic blood pressures measured by tail cuff on days 12, 16, and 18 after transfection were significantly higher in rats that received

Wanda Sue Marley; Richard Bowen; Robert W. Gotshall; Lee Wilke

2000-01-01

447

Unilateral agenesis of the diaphragm: a separate entity or an extremely large defect?  

Microsoft Academic Search

Since the mid-1980s, unilateral agenesis of the diaphragm (DA) has attracted the attention of paediatric surgeons as more\\u000a babies affected by this extreme form of congenital diaphragmatic hernia (CDH) survive. Some authors believe that it represents\\u000a a separate clinical entity. We undertook a retrospective analysis of all babies with CDH treated in the South-West Regional\\u000a Paediatric Surgical Centre in Bristol

M. Baglaj; R. Spicer; M. Ashworth

1999-01-01

448

Unilateral lower limb suspension: integrative physiological knowledge from the past 20 years (1991–2011)  

Microsoft Academic Search

In 1991, Hans Berg and colleagues published the first research investigation using unilateral lower limb suspension (ULLS)\\u000a as a human model to study the influence of unloading on skeletal muscle. ULLS requires a participant to perform all activities\\u000a with axillary crutches while wearing one thick-soled shoe. The elevated shoe eliminates ground contact with the adjacent foot,\\u000a thereby unloading the lower

K. J. Hackney; L. L. Ploutz-Snyder

449

Unilateral upper extremity lymphedema deteriorates the postural stability in breast cancer survivors  

PubMed Central

Aim of the study There is little known about any change in postural balance caused by asymmetrical volume increase due to unilateral upper extremity lymphedema in patients who underwent breast surgery. The aim of this study was to determine whether there is a change in postural balance by measuring postural sway velocity (PSV), center of gravity (CoG) displacement and directional control (DCL) in patients with unilateral upper extremity lymphedema in breast cancer survivors. Material and methods Eighteen females 38–60 (M = 53) years old diagnosed with upper extremity lymphedema due to breast cancer surgery, and 18 healthy females with similar ages (M = 52.5) were assessed using the Balance Master system (Neuro Com, Clackamas, USA). Unilateral stance (US) and bilateral stance (BS) tests in eyes open and closed conditions and the limit of stability (LOS) test were applied to quantify postural sway velocity (PSV), CoG displacement, and directional control (DCL). Results The lymphedema group showed a significant increase in PSV in the US test on the ipsilateral leg with eyes open (p = 0.02) and eyes closed (p = 0.005) as well as on the contralateral leg with eyes open (p = 0.004) and eyes closed (p = 0.0001). Average displacement and position of the CoG were 25% of LOS (p = 0.0001) towards the lymphedema side and 60.6 degrees respectively. DCL in the lymphedema group was significantly lower in forward (p = 0.0001), back (p = 0.003), ipsilateral (p = 0.002), and contralateral (p = 0.03) directions. Conclusions These findings suggest that unilateral upper extremity lymphedema may have challenging effects on postural balance.

Karadibak, Didem; Yavuzsen, Tugba; Demirbuken, Ilksan

2014-01-01

450

Unilateral dependant pulmonary edema during laparoscopic donor nephrectomy: report of three cases  

PubMed Central

Summary Unilateral pulmonary edema of the dependant lung was observed in three patients during laparoscopic donor nephrectomy. Patients were treated with O2 supplementation by face mask, fluid restriction and diuretic. All the patients were relieved of symptoms with radiological improvement. The possible causes of this unusual complication following laparoscopic surgery appear to be prolonged lateral decubitus position and high intraoperative fluid infusion. PMID:20640211

Modi, Manisha; Shah, Veena; Modi, Pranjal

2009-01-01

451

Two Cases of Unilateral Lichen Planus Following the Lines of Blaschko  

PubMed Central

A 50-year-old man and 71-year-old woman presented to our clinic with unilateral, linear, erythematous, pruritic lesions along the lines of Blaschko. On the basis of clinical and histopathological findings, the lesions were diagnosed as lichen planus with a Blaschkoian distribution, which is a rare form of lichen planus. The patients were treated with topical corticosteroids and antihistamines. PMID:25324660

Yayla, Derya; Oguz, Is?l Deniz; Gonul, Muzeyyen; Ozhamam, Esra; Colak, Aysel; Gul, Ulker

2014-01-01

452

Two cases of unilateral lichen planus following the lines of blaschko.  

PubMed

A 50-year-old man and 71-year-old woman presented to our clinic with unilateral, linear, erythematous, pruritic lesions along the lines of Blaschko. On the basis of clinical and histopathological findings, the lesions were diagnosed as lichen planus with a Blaschkoian distribution, which is a rare form of lichen planus. The patients were treated with topical corticosteroids and antihistamines. PMID:25324660

Yayla, Derya; Külcü Çakmak, Seray; O?uz, I??l Deniz; Gönül, Müzeyyen; Ozhamam, Esra; Colak, Aysel; Gül, Ulker

2014-10-01

453

Activation of Toll-like receptor 9 attenuates unilateral ureteral obstruction-induced renal fibrosis  

Microsoft Academic Search

Aim:To study whether activation of TLR9 by CpG-ODN would protect against and\\/or reverse renal fibrosis.Methods:Animals were treated with CpG-ODN before or after undergoing a unilateral ureteral obstruction (UUO) procedure. The interstitial fibrotic lesions of obstructed kidneys were evaluated using histology and immunohistostaining. The Th2-type cytokine profile and the expression and activity of sma and mad related protein (Smad)3, signal transducers

Bing-mu Xin; Xiao-xing Wang; Wen Jin; Hui-min Yan; Bing Cui; Xiao-wei Zhang; Fang Hua; Hong-zhen Yang; Zhuo-wei Hu

2010-01-01

454

Reliable solution of an unilateral contact problem with friction and uncertain data in thermo-elasticity  

Microsoft Academic Search

An unilateral contact problem with friction and with uncertain input data in quasi-coupled thermo-elasticity is analysed. As uncertain data coefficients of stress–strain law, coefficients of thermal conductivity, body and surface forces, thermal sources and friction coefficients are assumed, being prescribed in a given set of admissible functions. Method of worst scenario is applied to find the most “dangerous” admissible input

Ivan Hlavácek; Jirí Nedoma

2005-01-01

455

Auditory Abilities after Cochlear Implantation in Adults with Unilateral Deafness: A Pilot Study  

PubMed Central

Objective This pilot study examined speech recognition, localization, temporal and spectral discrimination and subjective reports of cochlear implant (CI) recipients with unilateral deafness. Study Design Three adult males with short-term unilateral deafness (< 5 years) participated. All had sudden onset of severe to profound hearing loss in one ear, which then received a CI, and normal or near normal hearing in the other ear. Speech recognition in quiet and noise, localization, discrimination of temporal and spectral cues and a subjective questionnaire were obtained over several days. Listening conditions were CI, normal hearing (NH) ear, and bilaterally (CI and NH). Results All participants had open-set speech recognition and excellent audibility (250–6000 Hz) with the CI. Localization improved bilaterally compared to the NH ear alone. Word recognition in noise was significantly better bilaterally than with the NH ear for two participants. Sentence recognition in various noise conditions did not show significant bilateral improvement; however, the CI did not hinder performance in noise even when noise was toward the CI side. The addition of the CI improved temporal difference discrimination for two participants and spectral difference discrimination for all participants. Participants wore the CI full time and subjective reports were positive. Conclusion Overall, the CI recipients with unilateral deafness obtained open-set speech recognition, improved localization, improved word recognition in noise, and improved perception of their ability to hear in everyday life. A larger study is warranted to further quantify the benefits and limitations of cochlear implantation in individuals with unilateral deafness. PMID:22935813

Firszt, Jill B.; Holden, Laura K.; Reeder, Ruth M.; Waltzman, Susan B.; Arndt, Susan

2012-01-01

456

Unilateral striatal CT and MRI changes secondary to non-ketotic hyperglycaemia.  

PubMed

A 62-year-old man presented with a right-sided hemichorea-hemiballismus secondary to underlying non-ketotic hyperglycaemia. This condition is recognised to have a unique finding of unilateral basal ganglia lesion, which is hyperdense on CT and hyperintense on T1-weighted MRI. The clinical course of this condition is benign and has a good prognosis with early correction of the hyperglycaemia. PMID:24792025

Johari, Bushra; Hanafiah, Mohammad; Shahizon, Azura Mohamed Mukhari; Koshy, Marymol

2014-01-01

457

Salivary scintigraphy with vitamin C stimulation: an aid in differentiating unilateral parotitis from Warthin's tumor  

Microsoft Academic Search

Of the nine patients included in this study, five with proven unilateral parotitis initially had diffuse high uptake of99mTc-pertechnetate in the affected glands with adequate washout following vitamin C stimulation. Of four patients with proven Warthin's tumor, two had focal high uptake in the parotid masses and two had diffuse high uptake on baseline images. All tumors were clearly delineated

Ren-Shyan Liu; Shin-Hwa Yeh; Tzu-Chen Yen; Der-Fong Hsu

1990-01-01

458

Changes in muscle contractile characteristics and jump height following 24 days of unilateral lower limb suspension  

Microsoft Academic Search

We measured changes in maximal voluntary and electrically evoked torque and rate of torque development because of limb unloading.\\u000a We investigated whether these changes during single joint isometric muscle contractions were related to changes in jump performance\\u000a involving dynamic muscle contractions and several joints. Six healthy male subjects (21 ± 1 years) underwent 3 weeks of unilateral\\u000a lower limb suspension (ULLS) of the right

Astrid M. HorstmanC; C. J. de Ruiter; N. T. L. van Duijnhoven; M. T. E. Hopman; A. de Haan

2012-01-01

459

The blink reflex in chronic cluster headache: a comparison with migraine patients suffering from unilateral pain  

Microsoft Academic Search

Objective. To evaluate the blink reflex (BR) in chronic cluster headache (CH) patients. Design. The elecrophysiological data\\u000a were collected in during the headache-free phase. Setting. Headache patients were recruited from outpatients seen for the\\u000a first time at the First Neurologic Clinic of Bari University. Patients and participants. Ten CH patients, 19 migraine without\\u000a aura patients with strictly unilateral headache (MwoA)

Marina de Tommaso; Marco Guido; Giuseppe Libro; Vittorio Scicchioiru; Luciana Losito; Olimpia Difruscolo; Francomichele Puca

2000-01-01

460

Behavioral asymmetries and neurochemical changes after unilateral lesions of tuberomammillary nucleus or substantia nigra  

Microsoft Academic Search

Previous studies in the rat have shown that the hypothalamic tuberomammillary nucleus, the major source of neuronal histamine,\\u000a is related to mechanisms of learning, memory, reinforcement, and functional recovery. These functional relationships were\\u000a found to be partly lateralized. Therefore, we decided to analyze whether unilateral ibotenic acid lesions aimed at this brain\\u000a region would acutely lead to asymmetries in open-field

Silvia Maisonnette; Joseph P. Huston; Marcus Brandao; R. K. W. Schwarting

1998-01-01

461

COST ANALYSIS OF LAPAROSCOPIC VERSUS OPEN ORCHIOPEXY IN THE MANAGEMENT OF UNILATERAL NONPALPABLE TESTICLES  

Microsoft Academic Search

Purpose:Laparoscopic exploration for the nonpalpable testicle (NPT) has been criticized for increased costs compared with primary inguinal\\/scrotal exploration, mostly due to high equipment costs and the need for open inguinal\\/scrotal exploration in many cases. We assessed costs associated with diagnostic laparoscopy vs inguinal\\/scrotal exploration followed by selective open or laparoscopic treatment for unilateral NPT to identify the most important factors

ARMANDO J. LORENZO; MINDY L. SAMUELSON; STEVEN G. DOCIMO; LINDA A. BAKER; YAIR LOTAN

2004-01-01

462

Fracture of synthetic diamond M. D. Droty  

E-print Network

Fracture of synthetic diamond M. D. Droty Ctystallume, 3506 Bassett Street, Santa Clara, California 1995) The fracture behavior of synthetic diamond has been investigated using indentation methods and by the tensile testing of pre-notched fracture-mechanics type samples. Specifically, the fracture toughness

Ritchie, Robert

463

Finite Conductivity Fractures in Elliptical Coordinates  

E-print Network

Finite Conductivity Fractures in Elliptical Coordinates Michael Francis Riley June 1991 #12;FINIT E: Dean of Graduate Studies .. 11 #12;ABSTRACT Hydraulic fracturing is a widely used method of enhancing, are made highly profitable via hydraulic fracturing. The fracturing process is expensive, thus

Stanford University

464

Bilateral noncontemporary hip fractures. 31 cases reported  

Microsoft Academic Search

Hip fractures are one of the leading causes of morbidity and mortality among the elderly. Hip fracture is usually due to the combination of an acute event (a fall) with a chronic condition like osteoporosis. The literature is not very informative on the incidence of bilateral hip fracture. To investigate the consequences of the later fracture, we studied 31 patients

L. Galois; Y. Dausse; D. Mainard; J. P Delagoutte

2001-01-01

465

Pathologies o Bone Fracture and Bone Repair  

E-print Network

(Bone Cancer) o Paget's Disease o Overuse Damage (Stress Fractures) o Considerations for Bioengineers1 Bone Pathologies o Bone Fracture and Bone Repair o Degenerative Changes Associated with Aging o TOPICS 1 Bone Fracture and Bone Repair A radiograph of a torsional bone fracture from a skiing accident

Gefen, Amit

466

Postural disturbances resulting from unilateral and bilateral diaphragm contractions: a phrenic nerve stimulation study.  

PubMed

Thoracoabdominal breathing movements are a complex source of postural disturbance, but there are contradictory reports in the literature with inspiration described as having either a backward or a forward disturbing effect. To elucidate the mechanisms underlying this phenomenon, the present study studied the postural disturbance caused by isolated contractions of the diaphragm. Eight male and four female healthy subjects followed an original paradigm of phrenic nerve stimulation (bilateral and unilateral) and "diaphragmatic" voluntary sniff maneuvers in the seated and standing postures. Center of gravity (CG) acceleration was calculated from force plate recordings, and respiratory kinematics were assessed with thoracic and abdominal sensor belts. CG and respiratory signals revealed that, while seated, bilateral phrenic stimulation and sniff maneuvers consistently produced expansion of the abdomen associated with a forward peak of CG acceleration. In the standing posture, the direction of the CG peak was reversed and always directed backward. Unilateral phrenic stimulation induced an additional medial-lateral acceleration of the CG, directed toward the nonactive side while seated, but in the opposite direction while standing. These results suggest that isolated diaphragmatic contractions produce a constant disturbing pattern for a given posture, but with opposite effects between standing and seated postures. This could be related to the different biomechanical configuration of the body in each posture, corresponding to distinct kinematic patterns of the osteoarticular chain. In addition, the lateral component of the CG acceleration induced by unilateral diaphragm contractions could be clinically relevant in patients with hemidiaphragm paralysis. PMID:25150226

Hamaoui, Alain; Hudson, Anna L; Laviolette, Louis; Nierat, Marie-Cécile; Do, Manh-Cuong; Similowski, Thomas

2014-10-15

467

Familiarity does not affect the unilateral field advantage for repetition detection.  

PubMed

We have previously reported evidence that repetitions of letters, colors, sizes, and common motion paths are more rapidly detected when they are presented unilaterally (i.e., both in the same visual field) versus bilaterally (one element in each visual field; Butcher and Cavanagh (Attention, Perception, & Psychophysics 70:714-724, 2008). Here, we report evidence that this unilateral field advantage (UFA) for repetition detection does not depend on prior experience with the elements that comprise the repetition. In Experiment 1, native English, Persian, and Japanese speakers were tested on a repetition detection task involving characters from Western, Arabic, and Japanese character sets. The character sets were tested in blocks, in each of which subjects were presented with four characters for 16 ms and asked to report whether any two of the characters were identical. The subjects were faster detecting repetitions that were presented unilaterally rather than bilaterally, and there was no interaction with stimulus familiarity. A second experiment replicated this finding with native English speakers only, using a longer stimulus duration (150 ms). We had previously proposed that the UFA arises because the low-level processes that group physically identical items operate more efficiently within than across hemifields. Our data now indicate that this grouping process is insensitive to item familiarity, supporting the claim that the process is low-level. PMID:22532384

Butcher, Serena J; Cavanagh, Patrick

2012-08-01

468

Rehabilitation of a child with partial unilateral cryptophthalmos and multiple congenital anomalies.  

PubMed Central

PURPOSE: This paper describes the surgical rehabilitation of a child with craniofacial anomalies, unilateral syndactyly, and partial unilateral cryptophthalmos associated with inferior colobomata of the iris and optic nerve and agenesis of the inferior rectus and inferior oblique muscles. The clinical presentation of cryptophthalmos is described. METHODS: The medical literature since the original description of cryptophthalmos in 1872 was reviewed to define patterns of inheritance and the incidence of associated anomalies. RESULTS: Including this patient, 149 case reports of cryptophthalmos were identified. In two families transmission from parent to child suggests dominant inheritance. None of the five dominant cases had any other anomalies, and all had bilateral complete cryptophthalmos. The incidence of cryptophthalmos in the remaining families is consistent with autosomal recessive inheritance. This group includes patients with bilateral, unilateral, and partial cryptophthalmos. Other anomalies are common, including those of the ear and nose, limbs, genitourinary system, and mouth and palate. Mortality in the perinatal period is associated with renal agenesis, laryngeal atresia, and pulmonary hypoplasia. CONCLUSIONS: Cryptophthalmos is a rare congenital anomaly with two patterns of inheritance. Images FIGURE 1 FIGURE 2 FIGURE 3 FIGURE 4 FIGURE 5 FIGURE 6 FIGURE 7 FIGURE 8 FIGURE 9 FIGURE 10 FIGURE 11 FIGURE 12 FIGURE 13 PMID:8719680

Konrad, H; Merriam, J C; Jones, I S

1995-01-01

469

Unilateral and Mild Bilateral Hearing Loss in Children: Past and Current Perspectives  

PubMed Central

Since the early 1980s, audiologists have become increasingly aware of the potential effect of even mild degrees of hearing loss on the psychoeducational and psychosocial outcomes of children. This review describes some of the key research findings during the past several decades that have led us to our current thinking about unilateral and mild bilateral hearing loss in children. The first section addresses unilateral hearing loss. This is followed by a review of the literature on mild bilateral hearing loss. Specifically, the issues addressed include the significance of permanent mild degrees of hearing loss on children's psychoeducational and psychosocial development and the speech, language, and auditory characteristics of children with mild degrees of hearing loss. Finally, some recommendations regarding the direction of future research are offered. This review is followed by 2 articles summarizing the proceedings of a 2005 workshop convened by the Centers for Disease Control and Prevention (CDC), Early Hearing Detection and Intervention (EHDI) program, and the Marion Downs Hearing Center to address concerns about the underidentification of—and professionals' apparent lack of awareness of—permanent unilateral and minimal to mild hearing loss in children.56,57 PMID:18270174

Tharpe, Anne Marie

2008-01-01

470

[True muscle hypertrophy of the unilateral calf in congenital myotonic dystrophy--a case report].  

PubMed

A 23-year-old female was admitted to our hospital because of unilateral calf enlargement. On neurological examination, she was mentally retarded with mild dysarthria. Grip myotonia was bilaterally present. Muscle weakness including those of face, neck and extremities was noted. The right calf tight and firm on palpation, was markedly enlarged with a circumference of 35.0 cm compared with 30.0 cm on the other side. Computed tomographic scans of the skeletal muscles revealed marked hypertrophy in the right triceps surae muscle. Electromyographic studies demonstrated persistent myotonic discharge in the hypertrophied gastrocnemius muscle. A muscle biopsy specimen obtained from the right gastrocnemius showed many hypertrophied muscle fibers, with prominent internal and sarcolemmal nuclei. Histographic analysis indicated a hypertrophy factor of 2,025 for type 1 fibers and 1,102 for type 2 fibers. DNA analysis by Southern hybridization technique showed large DNA fragment, consistent with congenital myotonic dystrophy. In the present patient, unilateral calf enlargement was an unusual feature associated with myotonic dystrophy. Neuroradiological and pathological studies confirmed true muscle hypertrophy of unilateral calf muscle. A search of the literature failed to reveal any case similar to our patient. PMID:8293616

Anegawa, T; Namamura, M; Hara, K; Yamamoto, K

1993-10-01

471

Unilateral Tinnitus: Changes in Connectivity and Response Lateralization Measured with fMRI  

PubMed Central

Tinnitus is a percept of sound that is not related to an acoustic source outside the body. For many forms of tinnitus, mechanisms in the central nervous system are believed to play a role in the pathology. In this work we specifically assessed possible neural correlates of unilateral tinnitus. Functional magnetic resonance imaging (fMRI) was used to investigate differences in sound-evoked neural activity between controls, subjects with left-sided tinnitus, and subjects with right-sided tinnitus. We assessed connectivity patterns between auditory nuclei and the lateralization of the sound-evoked responses. Interestingly, these response characteristics did not relate to the laterality of tinnitus. The lateralization for left- or right ear stimuli, as expressed in a lateralization index, was considerably smaller in subjects with tinnitus compared to that in controls, reaching significance in the right primary auditory cortex (PAC) and the right inferior colliculus (IC). Reduced functional connectivity between the brainstem and the cortex was observed in subjects with tinnitus. These differences are consistent with two existing models that relate tinnitus to i) changes in the corticothalamic feedback loops or ii) reduced inhibitory effectiveness between the limbic system and the thalamus. The vermis of the cerebellum also responded to monaural sound in subjects with unilateral tinnitus. In contrast, no cerebellar response was observed in control subjects. This suggests the involvement of the vermis of the cerebellum in unilateral tinnitus. PMID:25329557

Lanting, Cornelis P.; de Kleine, Emile; Langers, Dave R. M.; van Dijk, Pim

2014-01-01

472

Calvarial hyperostosis presenting as unilateral exophthalmos in a female English Springer Spaniel.  

PubMed

A 4-month-old intact female English Springer Spaniel presented to the University of Georgia Veterinary Teaching Hospital for evaluation of unilateral, progressive exophthalmos oculus sinister (OS) of 2 weeks' duration. Complete ophthalmic examination revealed moderate OS exophthalmos and lateral globe deviation. No other abnormalities were noted on physical or ophthalmic examination, ocular ultrasound, complete bloodwork, or thoracic radiography. Skull computed tomography (CT) revealed a large, focal, smoothly irregular, cavitated, expansile bony lesion involving the left caudal maxillary and left frontal bones. Biopsies, obtained through a frontal sinusotomy approach to preserve the left globe integrity, demonstrated normal reactive trabecular bone with locally extensive fibrosis. Calvarial hyperostosis was diagnosed based upon appearance on imaging, lesion unilaterality, absence of mandibular involvement, and histopathology. Six months after initial presentation, skull CT was repeated and marked reduction in the degree of frontal bone thickening was demonstrated with complete resolution of cavitations. There was marked clinical improvement with mild, nonpainful exophthalmos, and lateral globe deviation OS on ophthalmic examination. Eleven months after initial presentation, there was complete resolution of the frontal bone lesion with mild thickening of the left calvarial bones on repeat skull CT. There was no exophthalmos or globe deviation present on clinical ophthalmic examination. The proliferative osteopathic lesion was self-resolving with resolution of the exophthalmos and has not recurred to date. To the authors' knowledge, this is the first report of calvarial hyperostosis in a previously unreported breed presenting as unilateral exophthalmos. PMID:22192474

Mathes, Rachel L; Holmes, Shannon P; Coleman, Kevin D; Radlinsky, Mary A G; Moore, Phillip A

2012-07-01

473

An Extraoral Nasoalveolar Molding Technique in Complete Unilateral Cleft Lip and Palate  

PubMed Central

Summary: Although nasoalveolar molding is commonly performed before cleft lip surgery, customized palatal plate availability is limited for patients far from a hospital. This case report describes a preformed extraoral nasoalveolar molding (PENAM) appliance and treatment approach for presurgical nasoalveolar molding in newborns with complete unilateral cleft lip and palate. A 12-day-old boy presented with complete unilateral cleft lip and palate. The PENAM device was supported by an adhesive-taped upper lip, which consisted of a lip nasal stent made from a 0.5-mm stainless steel wire. The spring was activated monthly. The shape of the cartilaginous septum, alar cartilage tip, medial crus, lateral crus, and alveolar segments was molded to resemble the normal shape of these structures. The 9.3-mm alveolar gaps were reduced and approximated. The approximation mostly came from the major alveolus segment with approximately 6.4-mm movement. Cleft side nostril height increased 5.5?mm and deviation of the columella was corrected by 42°. PENAM can be helpful in infants with unilateral cleft lip and palate because it has benefits for long-term forced delivery, requires less frequent activations, and is suitable for patients who live far from a hospital.

Zhou, Lian; Zhao, Ji-Zhi; Ko, Ellen Wen-Ching

2013-01-01