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Gopalakrishnan M Sasidharan
Epidermoid cysts are notorious for their propensity to sneak into deep recesses between cranial nerves in the posterior fossa. Attempts to achieve complete excision using ordinary instruments when tempted by the seeming ease of dissection is known to cause unacceptable deficits. The Xomed monopolar stimulator electrode probe of the nerve integrity electromyography monitor has several advantages when used as the primary dissection tool for deep-seated epidermoid cysts. Cerebellopontine angle epidermoid is the classical prototype of a strategically placed deep-seated epidermoid tumor...
January 12, 2018: Curēus
Miles O Fortner, Paul A Oakley, Deed E Harrison
[Purpose] To present the case of the non-surgical restoration of cervical lordosis in a patient suffering from chronic whiplash syndrome including chronic neck pain and daily headaches resulting from previous whiplash. [Subject and Methods] A 31 year old female presented with a chief complaint of chronic neck pain and headaches for 12 years, correlating temporally with a sustained whiplash. These symptoms were not significantly relieved by previous chiropractic spinal manipulative therapy. The patient had cervical hypolordosis and was treated with Chiropractic BioPhysics® protocol including extension exercises, manual adjustments and cervical extension traction designed to increase the cervical lordosis...
February 2018: Journal of Physical Therapy Science
M P A van den Ende, G Marketos, A R Niemeijer, C J Spiers
Intergranular pressure solution creep is an important deformation mechanism in the Earth's crust. The phenomenon has been frequently studied and several analytical models have been proposed that describe its constitutive behavior. These models require assumptions regarding the geometry of the aggregate and the grain size distribution in order to solve for the contact stresses and often neglect shear tractions. Furthermore, analytical models tend to overestimate experimental compaction rates at low porosities, an observation for which the underlying mechanisms remain to be elucidated...
January 2018: Journal of Geophysical Research. Solid Earth
Jana Declercq, Stéphan Tulkens, Sarah Van Leuven
This article examines the Twitter and Facebook uptake of health messages from an infotainment TV show on food, as broadcasted on Belgium's Dutch-language public broadcaster. The interest in and amount of health-related media coverage is rising, and this media coverage is an important source of information for laypeople, and impacts their health behaviours and therapy compliance. However, the role of the audience has also changed; consumers of media content increasingly are produsers, and, in the case of health, expert consumers...
March 1, 2018: Health (London)
Frederik Berrevoet
Management of a patient with an open abdomen is difficult, and the primary closure of the fascial edges is essential to obtain the best patient outcome, regardless of the initial etiology of the open abdomen. The use of temporary abdominal closure devices is nowadays the gold standard to have the highest closure rates with mesh-mediated fascial traction as the proposed standard of care. However, the incidence of incisional hernias, although much more controlled than when leaving an abdomen open, is high and reaches up to 65%...
2018: Frontiers in Surgery
Calyn B Maske, Gregory C Loney, Nicole Lilly, Sarah J Terrill, Diana L Williams
The idea that gut-derived satiation signals influence food reward has recently gained traction, but this hypothesis is largely based on studies focused on neural circuitry, not the peripherally released signals. Here, we directly tested the hypothesis that intragastric (IG) nutrient infusion can suppress motivation for food. In a series of experiments, IG sucrose infusion (15 kcal) significantly and reliably reduced operant responding for a sucrose reward on a progressive ratio (PR) schedule. Moreover, food deprivation for 24 h before the test session did not prevent the suppressive effect of nutrients...
March 13, 2018: American Journal of Physiology. Endocrinology and Metabolism
Haidang Phan, Younho Cho, Weibin Li
The current theoretical work investigates multiple scattering of surface waves from shallow cavities at the surface of an elastic half-space. The multiple scattered field is shown to be equivalent to the field generated by the application of a distribution of tractions, obtained from the incident wave, on the surfaces of the cavities. Using a self-consistent method, an analytical approach is proposed to derive an explicit set of equations which approximate the multiple scattered field. Its far-field displacement amplitude is then calculated and verified by numerical calculation obtained by the boundary element method (BEM)...
February 26, 2018: Ultrasonics
Patrick J Buchanan, John A I Grossman, Andrew E Price, Chandan Reddy, Mustafa Chopan, Harvey Chim
BACKGROUND: Most brachial plexus birth injuries (BPBI) are caused by traction on the brachial plexus during a difficult delivery. Fortunately, the possibility of complete recovery from such an incident is relatively high, with only 10% to 30% of patients having prolonged and persistent disability. These patients have muscle imbalances and co-contractions typically localized around the shoulder and elbow. These imbalances and co-contractures cause abnormal motor performances and bone/joint deformities...
March 1, 2018: Hand: Official Journal of the American Association for Hand Surgery
Vittorio Mattugini, Carmine Citarelli, Fabio Cosseddu, Marco Ghilard, Guido Luppichini, Francesco Casella, Giulio Agostini, Federico Sacchetti, Rodolfo Capanna
Fibular head avulsion fractures are rare injuries determined by traction of the fibular attachment of the lateral collateral ligament (LCL). Surgical treatment is often recommended with different techniques such as tension band fixation or lag screws stabilization. In this article, we describe a fixation technique of fibular head fractures obtained through the use of anchors. A 45-year-old athletic patient came to our attention in our traumatologic service after a motorcycle accident. He reported a complex injury of the posterolateral corner with an avulsion fracture of the left fibular head...
March 12, 2018: Surgical Technology International
Mehdi Moini
In the past few years, there has been a significant effort by the forensic science community to develop new scientific techniques for the analysis of forensic evidence. Forensic chemists have been spearheaded to develop information-rich confirmatory technologies and techniques and apply them to a broad array of forensic challenges. The purpose of these confirmatory techniques is to provide alternatives to presumptive techniques that rely on data such as color changes, pattern matching, or retention time alone, which are prone to more false positives...
March 12, 2018: Electrophoresis
Malo Le Hanneur, Andres A Maldonado, Benjamin M Howe, Michelle L Mauermann, Robert J Spinner
BACKGROUND: Several hypotheses have been proposed for the pathophysiology of suprascapular nerve (SSN) palsy, including compression, traction, and nerve inflammation. OBJECTIVE: To provide insight into the pathophysiology of isolated nontraumatic SSN palsy by performing critical reinterpretations of electrodiagnostic (EDX) studies and magnetic resonance (MR) images of patients with such diagnosis. METHODS: We retrospectively reviewed all patients referred to our institution for the past 20 yr with a diagnosis of nontraumatic isolated suprascapular neuropathy who had an upper extremity EDX study and a shoulder or brachial plexus MR scan...
February 26, 2018: Neurosurgery
V Lew, E McKay, M Maze
Introduction: For a drug that has been omnipresent for nearly 200 years, nitrous oxide's (N2O) future seems less certain than its illustrious past. Environmental concerns are coming to the fore and may yet outweigh important clinical benefits. Sources of data: After determining the scope of the review, the authors used PubMed with select phrases encompassing the words in the scope. Both preclinical and clinical reports were considered. Areas of agreement: The analgesic and anaesthetic advantages of N2O remain despite a plethora of newer agents...
March 1, 2018: British Medical Bulletin
Orçun Çiftci, Kerem Can Yılmaz, Atilla Sezgin, Mehmet Bülent Özin, İbrahim Haldun Müderrisoğlu, Mehmet Haberal
OBJECTIVES: Cardiac implantable electrical devices are widely used for patients with advanced heart failure and are usually explanted during orthotopic heart transplant. However, lead fragments and the pulse generator are sometimes left after the procedure. Given the concerns of infectious and thromboembolic complications, their removal is recommended. Herein, we report our experience with cardiac implantable electrical device explantation after orthotopic heart transplant. MATERIALS AND METHODS: We included recipients of heart transplants performed at Başkent University Faculty of Medicine, Department of Cardiovascular Surgery, who underwent lead and pulse generator explantation by manual traction between January 2012 and June 2017...
March 2018: Experimental and Clinical Transplantation
Heather Thomas, Julia Yole, Michael H Livingston, Karen Bailey, Brian H Cameron, Lisa VanHouwelingen
PURPOSE: The "cut and push" technique for removal of percutaneous endoscopic gastrostomy (PEG) tubes with collapsible bumpers offers an alternative to the standard traction method of removal. This study compared the outcomes of these techniques. METHODS: We completed a research ethics board-approved retrospective cohort study, identifying all patients less than 18years of age who underwent PEG tube removal at a children's hospital between December 2013 and December 2016...
February 8, 2018: Journal of Pediatric Surgery
Ahmet Karakasli, Nihat Acar, Bora Uzun
OBJECTIVE: Many lumbosacral fixation techniques have been described to offer a more screw-bone purchase. The forward anatomical fixation parallel to the endplate is still the most preferred method. Literature revealed little knowledge regarding the mechanical stability of lumbosacral trans-endplate fixation compared to the traditional trans-pedicular screw fixation method. The aim of this study is to assess the pull-out strength of lumbosacral screws penetrating the end plate and comparing it to the conventional trans-pedicular screw insertion method...
March 2018: Journal of Korean Neurosurgical Society
Xiaoli Liu, Daqi Zhang, Guang Zhang, Lina Zhao, Le Zhou, Yantao Fu, Shijie Li, Yishen Zhao, Changlin Li, Che-Wei Wu, Feng-Yu Chiang, Gianlorenzo Dionigi, Hui Sun
AIM: We assess the prevalence and mechanism of recurrent laryngeal nerve (RLN) injury in central neck dissection (CND) for thyroid cancer. METHODS: CND with intraoperative neural monitoring was outlined in 1.273 nerves at risk (NAR). RLN lesions were stratified according to: timing (during thyroidectomy versus CND), segmental vs. diffuse injury, mechanism, severity, location, number of lymph nodes dissected and metastastatic. EMG parameters were recorded. RESULTS: 49/1...
January 31, 2018: Surgical Oncology
Aaron Casp, Frank Winston Gwathmey
The use of hip arthroscopy continues to expand. Understanding potential pitfalls and complications associated with hip arthroscopy is paramount to optimizing clinical outcomes and minimizing unfavorable results. Potential pitfalls and complications are associated with preoperative factors such as patient selection, intraoperative factors such as iatrogenic damage, traction-related complications, inadequate correction of deformity, and nerve injury, or postoperative factors such as poor rehabilitation. This article outlines common factors that contribute to less-than-favorable outcomes...
April 2018: Clinics in Sports Medicine
Qing Wang, Xinjie Wu, Mingsheng Tan, Gaoju Wang, Shuang Xu, Yingna Qi
OBJECTIVE: To describe lower cranial nerve palsy (LCNP) following vertical over-distraction when performing occipitocervical fusion (OCF) to treat vertical atlantoaxial dislocation (AAD) and basilar invagination (BI) and to investigate its possible causes. METHODS: We report 4 cases with vertical AAD and BI who postoperatively presented with neurogenic dysphagia, dysarthria, and bucking after undergoing anatomical reduction. RESULTS: Patients underwent revision surgery to achieve partial reduction and demonstrated remarkable recovery of 9th , 10th and 11th nerve deficits...
March 7, 2018: World Neurosurgery
Anna Fabis-Strobin, Miroslaw Topol, Jaroslaw Fabis, Kryspin Niedzielski, Michal Podgorski, Lukasz Strobin, Michal Polguj
INTRODUCTION: Although the pathomechanism of isolated infraspinatus atrophy (ISA) in throwing sports is known to be traction, it is unclear why only some players are affected. One likely explanation is that the infraspinatus pulling force exerted by its contracture generate the compressive resultant component force (Fn) compressing the lateral trunk of the suprascapular nerve (LTSN) against the edge of scapular spine. This paper makes two key assumptions (1) the course of LTSN in relation to the scapular spine, defined as the suprascapular-scapular spine angle (SSSA) is the key individual anatomical feature influencing the Fn magnitude, and thus potentially ISA development (2) SSSA is correlated with scapular notch type...
March 9, 2018: Surgical and Radiologic Anatomy: SRA
Quinn Li, Laura Folly da Silva Constantino, M Ashley Spies
Discovery of novel tool compounds and drug leads against a range of unorthodox protein targets has pushed both experimental screening methodologies as well as the field of structure-based design to the limit in recent years. Increasingly, it has been recognized that some of the most desirable targets for the development of small-molecule effectors are actually protein-protein and protein-nucleic acid interactions. There are numerous nontrivial challenges to pursuing small-molecule lead compounds directed toward PPIs and PNIs: relatively shallow cavities, large surface areas that are natively complexed to macromolecules, complex patterns of interstitial waters, a paucity of "hot spots," large conformational changes upon ligand binding, etc...
2018: Methods in Enzymology
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