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https://www.readbyqxmd.com/read/28712802/efficacy-of-a-pelvic-lateral-positioner-with-a-mechanical-cup-navigator-based-on-the-anatomical-pelvic-plane-in-total-hip-arthroplasty
#1
Kentaro Iwakiri, Akio Kobayashi, Yoichi Ohta, Yukihide Minoda, Kunio Takaoka, Hiroaki Nakamura
BACKGROUND: The acetabular component orientation in total hip arthroplasty (THA) is of critical importance to the good clinical results. However, traditional widely used cup alignment guides for cup placement are reported to be relatively unreliable. The present study aims at comparing a novel cup alignment guide, which can be attached to our anatomical pelvic plane (APP) pelvic lateral positioner for reducing discrepancies in sagittal pelvic tilt and indicate a targeted cup angle based on the APP, with a conventional cup alignment guide...
June 27, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28705707/gata3-as-a-valuable-marker-to-distinguish-clear-cell-papillary-renal-cell-carcinomas-from-morphologic-mimics
#2
Jose G Mantilla, Tatjana Antic, Maria Tretiakova
Clear cell papillary renal cell carcinoma (CCPRCC) is a low-grade, indolent neoplasm, with no reported cases of death from disease or metastasis. These lesions can show clinical, morphologic and immunophenotypic overlap with several aggressive forms of renal cell carcinoma (RCC), including clear cell (CCRCC), translocation RCC and papillary RCC (PRCC) with cytoplasmic clearing. Given the difference in behavior, it is important to reliably separate these entities. We retrospectively reviewed 47 tumors from 45 patients with morphologic features of CCPRCC...
July 10, 2017: Human Pathology
https://www.readbyqxmd.com/read/28702908/water-quality-and-health-in-northern-canada-stored-drinking-water-and-acute-gastrointestinal-illness-in-labrador-inuit
#3
Carlee J Wright, Jan M Sargeant, Victoria L Edge, James D Ford, Khosrow Farahbakhsh, Inez Shiwak, Charlie Flowers, Sherilee L Harper
One of the highest self-reported incidence rates of acute gastrointestinal illness (AGI) in the global peer-reviewed literature occurs in Inuit communities in the Canadian Arctic. This high incidence of illness could be due, in part, to the consumption of contaminated water, as many northern communities face challenges related to the quality of municipal drinking water. Furthermore, many Inuit store drinking water in containers in the home, which could increase the risk of contamination between source and point-of-use (i...
July 12, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28702750/function-and-activity-after-minimally-invasive-total-hip-arthroplasty-compared-to-a-healthy-population
#4
Eberhard von Rottkay, Lars Rackwitz, Maximilian Rudert, Ulrich Nöth, Johannes Christian Reichert
PURPOSE: The aim of the present study was to compare the daily activity and functionality in a patient cohort 12 months after total hip arthroplasty (THA) using a direct anterior approach with a healthy non-operated control population. METHODS: Sixty-four patients who underwent THA and 59 healthy individuals (control) were assessed regarding their daily activity and joint functionality utilizing the Harris hip score (HHS), the extra short musculoskeletal functional assessment questionnaire (XSFMA), the Short Form 36 (SF-36) health survey and a Stepwatch™ Activity Monitor (SAM)...
July 12, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28700125/optical-assessment-of-mammographic-breast-density-by-a-12-wavelength-versus-a-continuous-spectrum-optical-spectroscopy-device
#5
E Jane Walter, Lothar Lilge
A 12-laser-wavelength, fixed source-detector position, cup-based optical breast spectroscopy (OBS) device was developed for use in large-scale, multi-center trials as a mammographic breast density (MBD) quantification and breast cancer risk pre-screening tool. In this study, the device was evaluated in comparison with a spectrometer-based device used in previous studies. The devices were compared on their ability to predict mammographic percent density (MPD) and to identify women with high MBD from optical spectra...
July 12, 2017: Journal of Biophotonics
https://www.readbyqxmd.com/read/28698757/new-safety-margins-for-melanoma-surgery-nice-possibility-for-drinking-of-just-that-cup-of-coffee
#6
Georgi Tchernev, Anastasiya Atanasova Chokoeva
BACKGROUND: The American Joint Committee on Cancer (AJCC's) skin melanoma surgical treatment recommendations from 2011 are characterised by a prima facie "freedom of choice" regarding how extensive should be the excisions for melanomas with tumour thickness up to 2 mm and melanoma in situ. It is unclear why the recommended surgical security margins vary between 0.5 and 1 cm for melanoma in situ, whereas for melanomas with a tumour thickness of up to 1.99 mm, the range of variation is also between 1 and 2 cm, without specifying when the surgical field should be broader and, narrower, accordingly...
June 15, 2017: Open Access Macedonian Journal of Medical Sciences
https://www.readbyqxmd.com/read/28697529/correction-of-pelvic-tilt-and-pelvic-rotation-in-cup-measurement-after-tha-an-experimental-study
#7
Timo Julian Schwarz, Markus Weber, Christian Dornia, Michael Worlicek, Tobias Renkawitz, Joachim Grifka, Benjamin Craiovan
Purpose Accurate assessment of cup orientation on postoperative pelvic radiographs is essential for evaluating outcome after THA. Here, we present a novel method for correcting measurement inaccuracies due to pelvic tilt and rotation. Method In an experimental setting, a cup was implanted into a dummy pelvis, and its final position was verified via CT. To show the effect of pelvic tilt and rotation on cup position, the dummy was fixed to a rack to achieve a tilt between + 15° anterior and -15° posterior and 0° to 20° rotation to the contralateral side...
July 11, 2017: RöFo: Fortschritte Auf Dem Gebiete der Röntgenstrahlen und der Nuklearmedizin
https://www.readbyqxmd.com/read/28691238/structure-and-ultrastructure-of-eyes-and-brains-of-thalia-democratica-thaliacea-tunicata-chordata
#8
Katrin Braun, Thomas Stach
Salps are marine planktonic chordates that possess an obligatory alternation of reproductive modes in subsequent generations. Within tunicates, salps represent a derived life cycle and are of interest in considerations of the evolutionary origin of complex anatomical structures and life history strategies. In the present study, the eyes and brains of both the sexual, aggregate blastozooid and the asexual, solitary oozooid stage of Thalia democratica (Forskål, ) were digitally reconstructed in detail based on serial sectioning for light and transmission electron microscopy...
July 10, 2017: Journal of Morphology
https://www.readbyqxmd.com/read/28684212/validation-of-a-new-2-d-technique-for-radiographic-wear-measurement-of-cemented-highly-cross-linked-polyethylene-acetabular-cups
#9
Brian Derbyshire, Bilal Barkatali
A new 2-D radiographic wear measurement system has been developed which enables the low wear of highly cross-linked polyethylene acetabular cups to be accurately and precisely measured from standard, pelvis radiographs. The software was validated using radiographic images of a measurement jig which could vary the cup orientation and simulate the effect of pelvic tilt/rotation. Wear was simulated using accurately measured plastic shims to vary the position of the femoral head relative to the cup. The effects of varying "wear" penetration, "wear" direction, cup orientation and X-ray focus position were assessed...
July 3, 2017: Medical Engineering & Physics
https://www.readbyqxmd.com/read/28675917/the-impact-of-coffee-on-health
#10
Karen Nieber
Coffee is one of the most popular and widely consumed beverages worldwide due to its stimulating effects on the central nervous system as well as its taste and aroma. Coffee is a complex mixture of more than 800 volatile compounds whereas caffeine and chlorogenic acids are the most common compounds. During the last years, coffee has progressively moved to a less negative position on health due to its better-known pharmacology. Caffeine, e.g., in a cup of coffee, appears to exert most of its effects through an antagonism of the adenosine receptors...
July 4, 2017: Planta Medica
https://www.readbyqxmd.com/read/28675048/biomechanical-causes-of-trapeziometacarpal-arthroplasty-failure
#11
V Spartacus, A Mayoly, A Gay, T Le Corroller, M Némoz-Gaillard, S Roffino, P Chabrand
Trapeziometacarpal joint prosthesis revision has been widely reported, mainly due to loosening of the trapezium cup. Our hypothesis is that current prostheses do not sufficiently respect the kinematics of this joint. CT scan acquisitions enabled us to determine the position of the first metacarpal relative to the trapezium in three different characteristic postures, in subjects in different stages of arthrosis. A CAD model of a current prosthesis was inserted into the numerical 3D model of the joint under the different postures...
July 4, 2017: Computer Methods in Biomechanics and Biomedical Engineering
https://www.readbyqxmd.com/read/28673203/bra-band-size-measurements-derived-from-three-dimensional-scans-are-not-accurate-in-women-with-large-ptotic-breasts
#12
Deirdre E McGhee, Lauren Ramsay, Celeste E Coltman, Sheridan A Gho, Julie R Steele
This study investigated differences in standard measurements used to determine bra size, under-bust chest circumference (UBCC) and over-bust chest circumference (OBCC), measured from a three-dimensional scan (hand-held scanner) compared to the direct measurement in 111 women (age 21-56 years; right breast volume 57-1672 mL; bra size 10A-18G). Bland-Altman plots of UBCC measurements showed a large positive bias and wide limits of agreement (12 cm; -4.6 to 28 cm), which increased as band size increased but decreased when the breasts were digitally removed from the scan prior to the UBCC measurement...
July 3, 2017: Ergonomics
https://www.readbyqxmd.com/read/28670333/synchronous-bilateral-tonsil-carcinoma-case-presentation-and-review-of-the-literature
#13
REVIEW
M-N Theodoraki, J A Veit, T K Hoffmann, J Greve
BACKGROUND: The incidence of synchronous bilateral tonsil carcinoma seems to be underreported. For adequate oncologic treatment, it is mandatory to remove all primaries to prevent recurrence or metachronic disease. The purpose of this manuscript is to provide a comprehensive review on this topic and to emphasize the need of bilateral tonsillectomy in cases of cancer of unknown primary (CUP) as well as in the case of a unilateral tonsillar carcinoma. MATERIAL AND METHODS: A systematic review of the literature was performed for "bilateral tonsillar neoplasm", "synchronous cancer of the oropharynx" and "cancer of unknown primary in head and neck"...
2017: Infectious Agents and Cancer
https://www.readbyqxmd.com/read/28661563/evaluation-of-a-new-methodology-to-simulate-damage-and-wear-of-polyethylene-hip-replacements-subjected-to-edge-loading-in-hip-simulator-testing
#14
Susan Partridge, Joanne L Tipper, Mazen Al-Hajjar, Graham H Isaac, John Fisher, Sophie Williams
Wear and fatigue of polyethylene acetabular cups have been reported to play a role in the failure of total hip replacements. Hip simulator testing under a wide range of clinically relevant loading conditions is important. Edge loading of hip replacements can occur following impingement under extreme activities and can also occur during normal gait, where there is an offset deficiency and/or joint laxity. This study evaluated a hip simulator method that assessed wear and damage in polyethylene acetabular liners that were subjected to edge loading...
June 29, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28660098/gait-implications-of-visual-field-damage-from-glaucoma
#15
Aleksandra Mihailovic, Bonnielin K Swenor, David S Friedman, Sheila K West, Laura N Gitlin, Pradeep Y Ramulu
PURPOSE: To evaluate fall-relevant gait features in older glaucoma patients. METHODS: The GAITRite Electronic Walkway was used to define fall-related gait parameters in 239 patients with suspected or manifest glaucoma under normal usual-pace walking conditions and while carrying a cup or tray. Multiple linear regression models assessed the association between gait parameters and integrated visual field (IVF) sensitivity after controlling for age, race, sex, medications, and comorbid illness...
June 2017: Translational Vision Science & Technology
https://www.readbyqxmd.com/read/28653620/cryo-electron-tomography-reveals-novel-features-of-a-viral-rna-replication-compartment
#16
Kenneth J Ertel, Desirée Benefield, Daniel Castaño-Diez, Janice G Pennington, Mark Horswill, Johan A den Boon, Marisa S Otegui, Paul Ahlquist
Positive-strand RNA viruses, the largest genetic class of viruses, include numerous important pathogens such as Zika virus. These viruses replicate their RNA genomes in novel, membrane-bounded mini-organelles, but the organization of viral proteins and RNAs in these compartments has been largely unknown. We used cryo-electron tomography to reveal many previously unrecognized features of Flock house nodavirus (FHV) RNA replication compartments. These spherular invaginations of outer mitochondrial membranes are packed with electron-dense RNA fibrils and their volumes are closely correlated with RNA replication template length...
June 27, 2017: ELife
https://www.readbyqxmd.com/read/28644852/comparisons-of-retinal-vessel-diameter-and-glaucomatous-parameters-between-both-eyes-of-subjects-with-clinically-unilateral-pseudoexfoliation-syndrome
#17
Yasuyuki Takai, Masaki Tanito, Tetsuro Omura, Ryo Kawasaki, Yumiko Kawasaki, Akihiro Ohira
PURPOSE: Pseudoexfoliation syndrome (PEX), the most common identifiable cause of open-angle glaucoma, might affect the retinal hemodynamics. To test this, we compared retinal vessel diameter and glaucoma-related parameters between eyes with pseudoexfoliation material (PE+) and fellow unaffected (PE-) eyes of patients with clinically unilateral PEX. METHODS: The medical records of 30 consecutive Japanese subjects were reviewed retrospectively. The retinal vessel diameters were measured and expressed as the central retinal arteriolar equivalent (CRAE) and central retinal venular equivalent (CRVE) using standardized software...
2017: PloS One
https://www.readbyqxmd.com/read/28641972/equal-primary-fixation-of-resurfacing-stem-but-inferior-cup-fixation%C3%A2-with-anterolateral-vs-posterior-surgical-approach-a-2-year-blinded-randomized-radiostereometric-and-dual-energy-x-ray-absorptiometry-study-of-metal-on-metal-hip-resurfacing-arthroplasty
#18
Mette H Hjorth, Nina D Lorenzen, Kjeld Søballe, Stig S Jakobsen, Maiken Stilling
BACKGROUND: The anterolateral (AntLat) surgical approach may spare the blood supply to the femoral head and improve the accuracy of cup positioning in metal-on-metal hip resurfacing arthroplasty. Thereby, potentially lessen complications such as avascular head necrosis, femoral neck narrowing and fracture, improve implant fixation, and lessen periprosthetic bone mineral density (BMD) loss. METHODS: Between November 2008 and January 2012, a randomized clinical trial was performed at Aarhus University Hospital...
May 25, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28641967/fluoroscopically-guided-acetabular-component-positioning-does-it-reduce-the-risk-of-malpositioning-in-obese-patients
#19
Raul G Gosthe, Juan C Suarez, Colin A McNamara, Cecilia Calvo, Preetesh D Patel
BACKGROUND: Obesity has been described as an independent risk factor for acetabular component malpositioning. The purpose of this study was to determine if this could be overcome by use of fluoroscopic navigation in total hip arthroplasty (THA). METHODS: The first, postoperative, standing, anteroposterior pelvis radiographs from 1599 consecutive patients who underwent fluoroscopic-guided THAs via anterior approach during a six-year period were obtained. We retrospectively reviewed this prospectively collected data...
May 5, 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28629942/can-a-target-zone-safer-than-lewinnek-s-safe-zone-be-defined-to-prevent-instability-of-total-hip-arthroplasties-case-control-study-of-56-dislocated-tha-and-93-matched-controls
#20
N Reina, S Putman, R Desmarchelier, E Sari Ali, P Chiron, M Ollivier, J Y Jenny, D Waast, C Mabit, E de Thomasson, C Schwartz, P Oger, L E Gayet, H Migaud, N Ramdane, M H Fessy
BACKGROUND: Various factors contribute to instability of total hip arthroplasty (THA), with implant orientation being a major contributor. We performed a case-control study with computed tomography (CT) data to determine whether: 1) orientation contributes to THA instability and 2) a safer target zone for stability than Lewinnek's classic safe zone can be defined. MATERIAL AND METHODS: We included prospectively 363 cases of THA dislocation that occurred during the calendar 2013 year in 24 participating hospitals...
June 16, 2017: Orthopaedics & Traumatology, Surgery & Research: OTSR
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