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Dual mobility

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https://www.readbyqxmd.com/read/28091769/bousquet-dual-mobility-socket-for-patient-under-fifty%C3%A2-years-old-more-than-twenty%C3%A2-year-follow-up-of-one-hundred-and-thirty-one-hips
#1
Remi Philippot, Thomas Neri, Bertrand Boyer, Brice Viard, Frederic Farizon
PURPOSE: The aim of this study was to analyze dual mobility cup survival rate on young patients under 50 years old at more than 20 years of follow up. METHODS: One hundred thirty seven hips with a first generation of dual mobility Bousquet cup (Serf) were included. The mean age at the time of the surgery was 41 years and the mean follow-up was 21.9 years. RESULTS: Twenty year follow-up cup survival rate was 77%. No dislocation occurred, 44 hips were revised (including 21 cup aseptic loosenings isolated, 15 Intra Prosthetic Dislocations), seven hips were lost to follow-up, 11 patients died, and 75 hips were still in situ...
January 16, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28091768/total-hip-arthroplasty-instability-treatment-without-dual-mobility-cups-brief-overview-and-experience-of-other-options
#2
REVIEW
Luigi Zagra, Eleonora Caboni
Dual mobility cups are getting increasing interest for the prevention, but also in the treatment of THA instability. Nevertheless when a dislocation occurs the main issue remains the knowledge and the correction of the causes of dislocation, including reorientation of the components and soft tissues treatment. There are several options of alternative implants to DMCs including upsizing of the head, and constrained liners. The Authors present how to evaluate patients with THA instability, the advantages and the disadvantages of each procedure and their experience in the treatment of cases without DMCs during a five years' time period...
January 14, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28079635/influences-of-age-obesity-and-adverse-drug-effects-on-balance-and-mobility-testing-scores-in-ambulatory-older-adults
#3
Eric Anson, Elizabeth Thompson, Brian L Odle, John Jeka, Zachary F Walls, Peter C Panus
BACKGROUND AND PURPOSE: The adverse effects of drugs may influence results on tests of mobility and balance, but the drug-specific impact is not identified when using these tests. We propose that a quantitative drug index (QDI) will assist in assessing fall risk based on these tests, when combined with other fall risk variables. METHODS: Fifty-seven community-dwelling older adults who could walk independently on a treadmill and had Mini-Mental State Examination (MMSE) scores equal to or greater than 24 participated...
January 10, 2017: Journal of Geriatric Physical Therapy
https://www.readbyqxmd.com/read/28078363/short-term-outcome-after-total-hip-arthroplasty-using-dual-mobility-cup-report-from-lithuanian-arthroplasty-register
#4
Sarunas Tarasevicius, Alfredas Smailys, Kazimieras Grigaitis, Otto Robertsson, Justinas Stucinskas
PURPOSE: The purpose of the study was to investigate how the use of dual-mobility cups (DMCs) affected the risk of revision due to dislocation as well as overall risk of revision compared with a conventional total hip arthroplasty (THA) system in the short term. METHODS: A total of 12,657 primary THAs were registered from the start of 2011 to the end of 2014. 620 THAs were with DMCs. For comparison, we included all registered THAs with Exeter cup and a cemented Exeter stem combined with 28-mm femoral head...
January 12, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28078362/use-of-dual-mobility-cup-in-revision-hip-arthroplasty-reduces-the-risk-for-further-dislocation-analysis-of-seven-hundred-and-ninety-one-first-time-revisions-performed-due-to-dislocation-reported-to-the-swedish-hip-arthroplasty-register
#5
Maziar Mohaddes, Peter Cnudde, Ola Rolfson, Alexander Wall, Johan Kärrholm
PURPOSE: Dislocation after total hip arthroplasty (THA) is a common reason for revision. The last decade fostered a significant increase in the use of dual-mobility cups (DMCs). Here we report our study on the short-term survival rate of a cemented DMC reported to the Swedish Hip Arthroplasty Register (SHAR) compared with other cemented designs used in first-time revision due to dislocation. METHODS: During 2005-2015, 984 first-time revisions for dislocation were reported to SHAR...
January 11, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28074818/cannulation-strategies-in-adult-veno-arterial-and-veno-venous-extracorporeal-membrane-oxygenation-techniques-limitations-and-special-considerations
#6
Arun L Jayaraman, Daniel Cormican, Pranav Shah, Harish Ramakrishna
Extracorporeal membrane oxygenation (ECMO) refers to specific mechanical devices used to temporarily support the failing heart and/or lung. Technological advances as well as growing collective knowledge and experience have resulted in increased ECMO use and improved outcomes. Veno-arterial (VA) ECMO is used in selected patients with various etiologies of cardiogenic shock and entails either central or peripheral cannulation. Central cannulation is frequently used in postcardiotomy cardiogenic shock and is associated with improved venous drainage and reduced concern for upper body hypoxemia as compared to peripheral cannulation...
January 2017: Annals of Cardiac Anaesthesia
https://www.readbyqxmd.com/read/28074257/outcomes-of-dual-mobility-cups-in-a-young-middle-eastern-population-and-its-influence-on-life-style
#7
Chahine Assi, Elie El-Najjar, Camille Samaha, Kaissar Yammine
Dual mobility cups (DMC) in total hip arthroplasty (THA) are becoming popular among orthopaedic surgeons. Substantial benefit of their use has been reported among high risk patients, particularly in reducing post-operative hip instability (dislocation). Many reports stated some concern when implanted in young and active people where complications such as polyethylene wear and mechanical loosening could potentially be higher. This Middle Eastern study analyses a retrospective series of THA for any aetiology other than infection, using DMC for the acetabular component in 75 patients (85 implants) less than 70 years old...
January 10, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28070611/dual-mobility-cups-provide-biomechanical-advantages-in-situations-at-risk-for-dislocation-a-finite-element-analysis
#8
Alexandre Terrier, Adeliya Latypova, Maika Guillemin, Valérie Parvex, Olivier Guyen
PURPOSE: Constrained devices, standard implants with large heads, and dual mobility systems have become popular options to manage instability after total hip arthroplasty (THA). Clinical results with these options have shown variable success rates and significant higher rates of aseptic loosening and mechanical failures with constrained implants. Literature suggests potential advantages of dual mobility, however little is known about its biomechanics. We present a comparative biomechanical study of a standard implant, a constrained implant, and a dual mobility system...
January 9, 2017: International Orthopaedics
https://www.readbyqxmd.com/read/28069739/a-two-tiered-mechanism-enables-localized-cdc42-signaling-during-enterocyte-polarization
#9
Lucas J M Bruurs, Susan Zwakenberg, Mirjam C van der Net, Fried J Zwartkruis, Johannes L Bos
Signaling by the small GTPase Cdc42 governs a diverse set of cellular processes that contribute to tissue morphogenesis. Since these processes often require highly localized signaling, Cdc42 activity must be clustered in order to prevent ectopic signaling. During cell polarization, apical Cdc42 signaling directs the positioning of the nascent apical membrane. However, the molecular mechanisms that drive Cdc42 clustering during polarity establishment are largely unknown.Here we demonstrate that during cell polarization localized Cdc42 signaling is enabled via activity-dependent control of Cdc42 mobility...
January 9, 2017: Molecular and Cellular Biology
https://www.readbyqxmd.com/read/28064148/community-weight-loss-to-combat-obesity-and-disability-in-at-risk-older-adults
#10
W Jack Rejeski, Walter T Ambrosius, Jonathan H Burdette, Michael P Walkup, Anthony P Marsh
BACKGROUND: Among older, overweight, and obese adults with either cardiovascular disease or the metabolic syndrome, reduced mobility and loss of leg strength are important risk factors for morbidity, disability, and mortality. It is unclear whether community-based approaches to weight loss may be an effective solution to this public health challenge. METHODS: An 18-month three-site, randomized controlled trial conducted by YMCA staff, with blinded assessors, enrolled 249 older, overweight, and obese adults with either cardiovascular disease or metabolic syndrome with randomization to three interventions: weight loss alone (WL), weight loss + aerobic training (WL + AT), and weight loss + resistance training (WT + RT)...
January 6, 2017: Journals of Gerontology. Series A, Biological Sciences and Medical Sciences
https://www.readbyqxmd.com/read/28057394/metal-ion-levels-in-young-active-patients-receiving-a-modular-dual-mobility-total-hip-arthroplasty
#11
Denis Nam, Rondek Salih, Katherine M Brown, Ryan M Nunley, Robert L Barrack
BACKGROUND: Dual mobility total hip arthroplasty (THA) components improve stability, yet use of a modular cobalt alloy acetabular liner may be associated with metal ion release. This study's purpose was to measure blood metal ion levels in young, active patients receiving a dual mobility THA prosthesis. METHODS: This is a prospective study of young, active patients undergoing primary THA. Twenty-six patients received a 22-mm cobalt alloy (n = 10) or a 28-mm ceramic (n = 16) femoral head, a modular cobalt chrome acetabular liner, with a highly cross-linked polyethylene insert (dual mobility)...
December 21, 2016: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28046848/th-ef-brb-06-implementation-of-a-modulated-arc-total-body-irradiation-tbi-technique-using-the-raystation-treatment-planning-system
#12
J Phillips, J Cheung, M Held, D Han, O Morin
PURPOSE: To develop a clinical workflow for delivering a modulated-arc total body irradiation (TBI) with RayStation scripting. This technique uses arc fields with the patient lying at floor level on a padded table and is validated through measurements taken on a custom-made TBI phantom. METHODS: Treatment planning was performed for a retrospective cohort of eight patients with a diverse range of heights and body types. Each was replanned using an open-field dual arc method, with the patient in supine and prone positions on the floor of the vault...
June 2016: Medical Physics
https://www.readbyqxmd.com/read/28044382/new-strategy-to-access-dual-stimuli-responsive-triple-shape-memory-effect-in-a-non-overlapping-pattern
#13
Hui Xie, Xiao-Ying Deng, Chuan-Ying Cheng, Ke-Ke Yang, Yu-Zhong Wang
Multistimuli-responsive shape-memory polymers are highly desirable in various applications, and numerous modes have been developed in recent years. However, most of them need to reprogram before they are ready to respond to another stimulus while one is triggered. Here, a new strategy is developed to achieve dual-stimuli-responsive triple-shape memory with non-overlapping effect in one programming cycle. Here, a series of poly(l-lactide)-poly(tetramethylene oxide) glycol copolymers (PLA-PTMEG-A) is prepared by selected dangling photoresponsive anthracene moieties on the crystalline PTMEG backbone...
January 3, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28042863/evaluating-the-more-suitable-ism-frequency-band-for-iot-based-smart-grids-a-quantitative-study-of-915-mhz-vs-2400-mhz
#14
Ruben M Sandoval, Antonio-Javier Garcia-Sanchez, Felipe Garcia-Sanchez, Joan Garcia-Haro
IoT has begun to be employed pervasively in industrial environments and critical infrastructures thanks to its positive impact on performance and efficiency. Among these environments, the Smart Grid (SG) excels as the perfect host for this technology, mainly due to its potential to become the motor of the rest of electrically-dependent infrastructures. To make this SG-oriented IoT cost-effective, most deployments employ unlicensed ISM bands, specifically the 2400 MHz one, due to its extended communication bandwidth in comparison with lower bands...
December 31, 2016: Sensors
https://www.readbyqxmd.com/read/28042114/dislocation-following-total-hip-arthroplasty-using-dual-mobility-acetabular-components-a-systematic-review
#15
I De Martino, R D'Apolito, V G Soranoglou, L A Poultsides, P K Sculco, T P Sculco
AIMS: The aim of this systematic review was to report the rate of dislocation following the use of dual mobility (DM) acetabular components in primary and revision total hip arthroplasty (THA). MATERIALS AND METHODS: A systematic review of the literature according to the Preferred Reporting Items for Systematic Reviews and Meta-analyses guidelines was performed. A comprehensive search of Pubmed/Medline, Cochrane Library and Embase (Scopus) was conducted for English articles between January 1974 and March 2016 using various combinations of the keywords "dual mobility", "dual-mobility", "tripolar", "double-mobility", "double mobility", "hip", "cup", "socket"...
January 2017: Bone & Joint Journal
https://www.readbyqxmd.com/read/28040939/design-and-characterization-of-microstrip-based-e-field-sensor-for-gsm-and-umts-frequency-bands
#16
N Narang, S K Dubey, P S Negi, V N Ojha
An Electric (E-) field sensor based on coplanar waveguide-fed microstrip antenna to measure E-field strength for dual-band operation at 914 MHz and 2.1 GHz is proposed, designed, and characterized. The parametric optimization of the design has been performed to obtain resonance at global system for mobile communication and universal mobile telecommunication system frequency band. Low return loss (-17 dB and -19 dB), appropriate gain (0.50 dB and 1.55 dB), and isotropic behaviour (directivity ∼ 1 dB), respectively, at 914 MHz and 2...
December 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28033463/enhanced-charge-carrier-transport-and-device-performance-through-dual-cesium-doping-in-mixed-cation-perovskite-solar-cells-with-near-unity-free-carrier-ratios
#17
Tao Ye, Miloš Petrović, Shengjie Peng, Jeremy Lee Kong Yoong, Chellappan Vijila, Seeram Ramakrishna
PbI2-enriched mixed perovskite film [FA0.81MA0.15Pb(I0.836Br0.15)3] has been widely studied due to its great potential in perovskite solar cell (PSC) applications. Herein, a FA0.81MA0.15Pb(I0.836Br0.15)3 film has been fabricated with the temperature-dependent optical absorption spectra utilized to determine its exciton binding energy. A ∼13 meV exciton binding energy is estimated, and a near-unity fraction of free carriers out of the total photoexcitons has been obtained in the solar cell operating regime at equilibrium state...
January 13, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28029367/on-the-feasibility-to-conduct-gradient-liquid-chromatography-separations-in-narrow-bore-columns-at-pressures-up-to-2000bar
#18
Ruben De Pauw, Tim Swier, Bart Degreef, Gert Desmet, Ken Broeckhoven
The limits in operating pressures are extended for narrow-bore columns in gradient elution up to 2000bar. As the required pumps for these pressures are incompatible with common chromatographic solvents and are not suitable to apply a mobile phase composition gradient, a mobile phase delivery and injection system is described and experimentally validated which allows to use any possible chromatographic solvent in isocratic and gradient elution. The mobile phase delivery and injection system also allows to perform multiple separations without the need to depressurize the column...
October 6, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28028863/stress-and-gender-effects-on-prefrontal-cortex-oxygenation-levels-assessed-during-single-and-dual-task-walking-conditions
#19
Roee Holtzer, Chelsea Scheon, Eleni Demetriou, Jeannette R Mahoney, Meltem Izzetoglu, Cuiling Wang, Joe Verghese
The ability to walk is critical for functional independence and wellbeing. The pre-frontal cortex (PFC) plays a key role in cognitive control of locomotion, notably under attention-demanding conditions. Factors that influence brain responses to cognitive demands of locomotion, however, are poorly understood. Herein we evaluated the individual and combined effects of gender and perceived stress on stride velocity and PFC Oxygenated Hemoglobin (HbO2 ) assessed during single and dual-task walking conditions. The experimental paradigm included Normal-Walk (NW); Cognitive Interference (Alpha); and Walk-While-Talk (WWT) tasks...
December 28, 2016: European Journal of Neuroscience
https://www.readbyqxmd.com/read/28026937/a-lithium-polysulfide-battery-with-dual-working-mode-enabled-by-liquid-fuel-and-acrylate-based-gel-polymer-electrolyte
#20
Ming Liu, Yuxun Ren, Dong Zhou, Haoran Jiang, Feiyu Kang, Tianshou Zhao
The low density associated with low sulfur areal loading in the solid-state sulfur cathode of current Li-S batteries is an issue hindering the development of this type of battery. Polysulfide catholyte as a recyclable liquid fuel was proven to enhance both the energy density and power density of the battery. However, a critical barrier with this lithium (Li)/polysulfide battery is that the shuttle effect, which is the crossover of polysulfides and side deposition on the Li anode, becomes much more severe than that in conventional Li-S batteries with a solid-state sulfur cathode...
January 9, 2017: ACS Applied Materials & Interfaces
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