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Xicai Sun, Bo Yan, Huy Q Truong, Hamid Borghei-Razavi, Carl H Snyderman, Juan C Fernandez-Miranda
Background  Surgical resection of parapharyngeal space (PPS) tumors is very challenging. An endoscopic-assisted surgical approach to this region requires detailed and precise anatomic knowledge. The main purpose of this study is to describe and compare the detailed anatomy of the PPS via transnasal transpterygoid (TP) and endoscopic-assisted transoral (TO) approaches. Materials and Methods  Six fresh injected cadaver heads (12 sides) were prepared for dissection of the PPS via TP and TO approaches. Computed tomography (CT) with image-based navigation (Navigation System II; Stryker, Kalamazoo, Michigan, United States) was used to identify bony structures around the PPS...
June 2018: Journal of Neurological Surgery. Part B, Skull Base
Kenneth M Winneg, Jo Ellen Stryker, Daniel Romer, Kathleen Hall Jamieson
For those at risk for Zika virus infection, prevention requires an approach that includes individual, interpersonal, and community-level support for behavior change. In August 2016, the announcement of local Zika transmission in Florida provided an opportunity to determine whether Zika-related knowledge, attitudes, and behaviors might be affected differentially in Florida compared to the rest of the nation. From August 8-October 3, 2016, we conducted nationally representative weekly surveys (N = 12,236), oversampling Florida residents, measuring Zika virus news exposure, knowledge about transmission and prevention of the infection, and attitudes and behaviors toward prevention...
May 8, 2018: Risk Analysis: An Official Publication of the Society for Risk Analysis
S W F Middleton, P J Schranz, V I Mandalia, A D Toms
BACKGROUND: The surgical management of isolated medial compartment degenerative disease of the knee causes debate. Unicompartmental arthroplasty options include fixed and mobile bearing implant designs with fixed bearing becoming increasingly popular. We present the largest cohort of a fixed bearing single radius design, Stryker Triathlon Partial Knee Replacement (PKR). METHODS: We prospectively collected demographic data and patient reported outcome measures (PROMs) on our cohort of PKR implants since its adoption in our unit, 2009 until March 2015...
May 3, 2018: Knee
Denis Nam, Rondek Salih, Robert L Barrack, Ryan M Nunley
BACKGROUND: Prior investigations have shown a decrease in periprosthetic bone mineral density (BMD) of the calcar following total hip arthroplasty (THA). The purpose of this investigation was to study proximal femur BMD in a cohort of young, active patients following THA at 1 year postoperatively using a recently introduced stem design. METHODS: This was a prospective, IRB-approved investigation of patients with an age <65 years, BMI <35 kg/m2 , and presymptomatic UCLA score of >6 undergoing a primary THA for a diagnosis of osteoarthritis...
May 1, 2018: Hip International: the Journal of Clinical and Experimental Research on Hip Pathology and Therapy
Koen T Van Hamersveld, Perla J Marang-Van De Mheen, Rob G H H Nelissen, Sören Toksvig-Larsen
Background and purpose - With a rapidly increasing population in need of total knee arthroplasty (TKA), there is renewed interest in cost-saving all-polyethylene designs. Differences between metal-backed and all-polyethylene designs in initial component migration assessed by radiostereometric analysis (RSA), a proven predictor for late aseptic loosening, have been scantily reported. The purpose of this study was to compare implant migration and clinical outcomes of all-polyethylene tibial components versus metal-backed trays of similar geometrical shape...
May 1, 2018: Acta Orthopaedica
Hazem A H Hosny, Ahmed El-Bakoury, Sreebala C M Srinivasan, Rathan Yarlagadda, Jonathan Keenan
BACKGROUND: The use of highly porous acetabular components has shown to produce good results in revision acetabular surgery. Their surface characteristics enhance initial fixation and bone ingrowth which are prerequisites for adequate osseointegration. The purpose of this study is to analyze the mid-term to long-term survival, clinical and radiological outcomes using the Tritanium cup (Stryker, Mahwah, NJ) in revision hip surgery. METHODS: This is a retrospective review of all patients who underwent acetabular revision surgery using "Tritanium revision cup" between April 2007 and November 2010 at our institution...
March 27, 2018: Journal of Arthroplasty
Andrew R Hatala, Kelley Bird-Naytowhow, Tamara Pearl, Jen Peterson, Sugandhi Del Canto, Eddie Rooke, Stryker Calvez, Ryan Meili, Michael Schwandt, Jason Mercredi, Patti Tait
Saskatoon has nearly half of the diagnoses of HIV in Saskatchewan, Canada, with an incidence rate among Indigenous populations within inner-city contexts that is 3 times higher than national rates. Previous research does not adequately explore the relations between HIV vulnerabilities within these contexts and the experiences of illness disclosure that are informed by identity transformations, experiences of stigma, and social support. From an intersectionality framework and a constructivist grounded theory approach, this research involved in-depth, semistructured interviews with 21 Indigenous people living with HIV and/or AIDS in Saskatoon, both male and female...
April 1, 2018: Qualitative Health Research
Praveen Satarasinghe, Kojo D Hamilton, Michael J Tarver, Robert J Buchanan, Michael T Koltz
OBJECT: Utilization of pedicle screws (PS) for spine stabilization is common in spinal surgery. With reliance on visual inspection of anatomical landmarks prior to screw placement, the free-hand technique requires a high level of surgeon skill and precision. Three-dimensional (3D), computer-assisted virtual neuronavigation improves the precision of PS placement and minimization steps. METHODS: Twenty-three patients with degenerative, traumatic, or neoplastic pathologies received treatment via a novel three-step PS technique that utilizes a navigated power driver in combination with virtual screw technology...
April 17, 2018: Journal of Clinical Medicine
L Beever, F Swinbourne, S L Priestnall, G Ter Haar, D J Brockman
Three West Highland white terriers were presented for investigation of left-sided para-aural abscessation. CT revealed chronic otitis media with extensive osseous proliferation surrounding the horizontal and vertical ear canals contiguous with the expanded temporal bone, consistent with a unilateral variant of craniomandibular osteopathy. A left total ear canal ablation with lateral bulla osteotomy was performed in all dogs. An ultrasonic bone curette (Sonopet; Stryker) proved useful when removing the osseous proliferation in two dogs...
April 16, 2018: Journal of Small Animal Practice
Cassandra Iannucci, Ann MacPhail
PURPOSE: This study was situated within a longitudinal study of 5 teachers examining the realities of teaching physical education by determining the impact of individual dispositions and contextual factors on the career trajectories of postprimary physical education teachers in Ireland (Iannucci & MacPhail, 2017). One of these participants, Jane, was examined in this study to gain a greater understanding of the realities and tensions experienced by a postprimary teacher enacting 2 distinct sets of role expectations when teaching physical education and another school subject concurrently...
April 12, 2018: Research Quarterly for Exercise and Sport
Hirokazu Takai, Masatoshi Murayama, Sakumo Kii, Daisuke Mito, Chihiro Hayai, Satoru Motohashi, Tomoki Takahashi
PURPOSE: ADAPT is a fluoroscopic computer-assisted surgery system which intraoperatively shows the distance from the tip of the screw to the surface of the femoral head, tip-to-head-surface distance (TSD), and the tip-apex distance (TAD) advocated by Baumgaertner et al. The study evaluated the accuracy of ADAPT. PATIENTS AND METHODS: A total of 55 patients operated with ADAPT between August 2016 and March 2017 were included as subjects. TSD and TAD were measured postoperatively using computed tomography (CT) and X-rays...
March 19, 2018: Injury
Michelle F M Ten Brinck, Joost de Vries, Ronald H M A Bartels, J André Grotenhuis, Hieronymus D Boogaarts
BACKGROUND: Stent-assisted coiling (SAC) is increasingly being performed as intervention for wide-neck intracranial aneurysms. The NeuroForm Atlas Stent (CE-marked; Stryker, Kalamazoo, Michigan) is relatively new. OBJECTIVE: To evaluate the effectiveness and safety of NeuroForm Atlas SAC for intracranial aneurysms in the first such study. METHODS:  We retrospectively analyzed data from all patients treated with the NeuroForm Atlas SAC of an intracranial aneurysm, both ruptured and unruptured, between June 2015 and December 2016...
March 21, 2018: Neurosurgery
Guangyu Zhu, Xiangdong Tian, Dongfeng Du, Ming Lei, Lei Guan, Jian Wang, Yetong Tan, Chen Yang, Xinxin Zheng
OBJECTIVE: Arthroscopy is a minimally invasive surgical procedure on a joint in which examination and treatment of knee damage is performed using a surgical device known as the arthroscope. Lipoma arborescens (LA), an infrequent intra-articular lesion, originates from mature adipose cells under subsynovial tissue. The synovial membrane is pale yellow with large villous projections. It is caused by various underlying factors. We found many patients with LA and processed them appropriately...
January 12, 2018: Computerized Medical Imaging and Graphics: the Official Journal of the Computerized Medical Imaging Society
Megan A Stryker, Raunak D Patel, Dunia T Khaled, Amanda F Saltzman, Jeremy Konheim, Danica May, Allison Feibus, Joseph Fougerousse, Ashley Richman, William Chastant, Samantha Prats, Brian Baksa, Melissa M Montgomery
Background: Proper instruction during medical training regarding performing adequate physical examinations prior to urologic consultations greatly improves patient care. We evaluated the frequency of genitourinary (GU) physical examinations performed prior to urologic consultation to determine the influence of factors affecting the completion of these examinations. Methods: Between January 2013 and December 2014, 1,596 consultations were requested by primary providers and completed by the urology department at a major tertiary care teaching institution...
2018: Ochsner Journal
Karim Sabeh, Milad Alam, Samuel Rosas, Shahrose Hussain, Michaela Schneiderbauer
INTRODUCTION: The growing trends of total knee arthroplasty (TKA) foreshadow an inevitable increase in the financial burden on healthcare expenditure estimated to almost nine billion dollars annually. This study aims to demonstrate the potential savings when using all-polyethylene (AP) compared to metal-backed (MB) tibial components and describes the cost variability amongst three major commercially available implants. MATERIALS AND METHODS: The cost of AP versus MB implants was analyzed using a large nationwide database, Emergency Care Research Institute (ECRI)...
March 12, 2018: Surgical Technology International
Y L Rodrigues, M T Mathew, L G Mercuri, J S P da Silva, B Henriques, J C M Souza
The aim of this study was to perform a literature review on the use of finite element modeling (FEM) for the evaluation of the biomechanical behavior of temporomandibular joint replacement (TMJR) devices. An electronic search of online medical and scientific literature database was conducted using selected search terms. The search identified 307 studies, of which 19 were considered relevant to this study. Of the 19 selected studies, 10 (52.6%) investigated the influence of geometry and fixation methods, while two (10...
March 8, 2018: International Journal of Oral and Maxillofacial Surgery
Alex V Benjamin, Kirstie Wailes-Newson, Anna Ma-Wyatt, Daniel H Baker, Alex R Wade
Most of our knowledge about vision comes from experiments in which stimuli are presented to immobile human subjects or animals. In the case of human subjects, movement during psychophysical, electrophysiological, or neuroimaging experiments is considered to be a source of noise to be eliminated. Animals used in visual neuroscience experiments are typically restrained and, in many cases, anesthetized. In reality, however, vision is often used to guide the motion of awake, ambulating organisms. Recent work in mice has shown that locomotion elevates visual neuronal response amplitudes (Niell and Stryker, 2010; Erisken et al...
March 21, 2018: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
Michael F Winchell, Naresh Pai, Benjamin H Brayden, Chris Stone, Paul Whatling, John P Hanzas, Jody J Stryker
The estimation of pesticide concentrations in surface water bodies is a critical component of the environmental risk assessment process required by regulatory agencies in North America, the European Union, and elsewhere. Pesticide transport to surface waters via deposition from off-field spray drift can be an important route of potential contamination. The spatial orientation of treated fields relative to receiving water bodies make prediction of off-target pesticide spray drift deposition and resulting aquatic estimated environmental concentrations (EECs) challenging at the watershed scale...
January 2018: Journal of Environmental Quality
Kellen Worhacz, Marc C Jacofsky, David J Jacofsky, Sarim Ahmed
Obesity is associated with increased surgical complications that may lead to suboptimal total knee arthroplasty (TKA) outcomes. Additionally, females exhibit increased rates of severe, clinical osteoarthritis OA, along with increased ligamentous laxity. Therefore, obese females present a particularly challenging case for TKA with increased joint loads coupled with a propensity for instability. This study retrospectively analyzed knee range of motion and stability of one TKA designs with two different degrees of polyethylene conformity in the obese female population...
January 22, 2018: Journal of Knee Surgery
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