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https://www.readbyqxmd.com/read/29793172/on-the-autonomous-motion-of-active-drops-or-bubbles
#1
Yuri S Ryazantsev, Manuel G Velarde, Eduardo Guzman, Ramón G Rubio, Francisco Ortega, Juan-Jose Montoya
Thermo-capillary stresses on the surface of a drop can be the result of a non-isothermal surface chemical conversion of a reactant dissolved in the host fluid. The strength of heat production (with e.g. absorption) on the surface is ruled by the diffusion of the reactant and depends on the state of motion of the drop. Such thermo-capillary stresses can provoke the motion of the drop or its motionless state in the presence of an external body force. If in the balance of forces, including indeed viscous drag, the net resultant force vanishes there is the possibility of autonomous motion with constant velocity of the drop...
May 19, 2018: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/29793126/effect-of-manual-therapy-versus-proprioceptive-neuromuscular-facilitation-in-dynamic-balance-mobility-and-flexibility-in-field-hockey-players-a-randomized-controlled-trial
#2
Gemma V Espí-López, Susana López-Martínez, Marta Inglés, Pilar Serra-Añó, Marta Aguilar-Rodríguez
OBJECTIVES: To compare the effectiveness of a specific Manual Therapy (MT) protocol applied to field hockey players (FHP), versus a Proprioceptive Neuromuscular Facilitation (PNF) protocol, in the improvement of dynamic balance, active range of movement and lumbar flexibility one-week and four-weeks after the treatment. DESIGN: Randomized controlled trial. Participants were assigned to 2 groups: MT and PNF. 30 min' sessions were performed once a week for three weeks...
April 22, 2018: Physical Therapy in Sport
https://www.readbyqxmd.com/read/29792285/associations-between-trunk-postural-control-in-walking-and-unstable-sitting-at-various-levels-of-task-demand
#3
Julian C Acasio, Courtney M Butowicz, Pawel R Golyski, Maury A Nussbaum, Brad D Hendershot
Trunk postural control (TPC) has been investigated in several populations and tasks. Previous work observed targeted training of TPC via isolated trunk control tasks may improve performance in other activities (e.g., walking). However, the nature of this relationship remains unknown. We therefore investigated the relationship between TPC, at both the global (i.e., response to finite perturbations) and local (i.e., resistance to continuous perturbations) levels, during walking and unstable sitting, both at varying levels of task demand...
May 21, 2018: Journal of Biomechanics
https://www.readbyqxmd.com/read/29792105/risk-factors-for-groin-injury-and-symptoms-in-elite-level-soccer-players-a-cohort-study-in-the-dutch-professional-leagues
#4
Rob Langhout, Igor Tak, Anne-Marie van Beijsterveldt, Martijn Ricken, Adam Weir, Maarten Barendrecht, Gino Kerkhoffs, Janine Stubbe
Study Design Cohort study with prospective and retrospective elements. Background Groin injury and symptoms are common in soccer players. Their relationship with reduced hip range of motion (ROM) and previous injury is unclear. Objectives To conduct a retrospective assessment of associations between previous injury and pre-season hip ROM and pre-season prevalence of severe groin symptoms; and prospective identification of risk factors for within-season groin injury. Methods During 2015-2016, 190 players from 9 Dutch professional soccer clubs participated...
May 23, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29792104/association-of-hip-and-foot-factors-with-patellar-tendinopathy-jumper-s-knee-in-athletes
#5
Luciana D Mendonça, Juliana M Ocarino, Natália F N Bittencourt, Luciana G Macedo, Sérgio T Fonseca
Study Design Clinical measurement, cross-sectional. Background Investigations on the causes of patellar tendinopathy (PT) should consider impairments at the hip and foot/ankle since they are known to influence movement patterns and affect patellar tendon loading. Objectives To investigate, by means of CART analysis, impairments of the hip and foot/ankle that are associated with PT in volleyball and basketball athletes. Methods One-hundred and ninety athletes were assessed for impairments of the hip and foot/ankle including: shank-forefoot alignment (SFA), ankle dorsiflexion range of motion (DF ROM), iliotibial band flexibility, passive hip internal rotation (IR) ROM, and hip external rotator (ER) and hip abductor isometric strength...
May 23, 2018: Journal of Orthopaedic and Sports Physical Therapy
https://www.readbyqxmd.com/read/29791927/treatment-outcome-of-reconstruction-for-isolated-posterior-cruciate-injury-subjective-and-objective-evaluations
#6
Satoshi Ochiai, Tetsuo Hagino, Shinya Senga, Takashi Yamashita, Hirotaka Haro
There is no consensus regarding the treatment method and outcome of posterior cruciate ligament (PCL) injury. We hypothesized that although the outcome of PCL reconstruction was favorable in terms of knee stability, the outcome was unsatisfactory in terms of patient-based assessments. The purpose of this study is to evaluate the treatment outcomes of knees that underwent reconstruction for PCL injury by subjective and objective assessments, and to analyze the correlation between various assessments. Twenty-three patients who underwent PCL reconstruction were studied...
May 23, 2018: Journal of Knee Surgery
https://www.readbyqxmd.com/read/29791704/use-of-neuromuscular-electrical-stimulation-during-physical-therapy-may-reduce-the-incidence-of-arthrofibrosis-after-total-knee-arthroplasty
#7
Chukwuweike U Gwam, Tanner McGinnis, Jennifer I Etcheson, Nicole E George, Assem A Sultan, Ronald E Delanois, Anil Bhave, Steven F Harwin, Michael A Mont
INTRODUCTION: Arthrofibrosis remains a major complication following total knee arthroplasty (TKA) that negatively impacts patient outcomes and exhausts healthcare resources. The use of neuromuscular electrical stimulation (NMES) has demonstrated the ability to facilitate quadriceps muscle recovery and reduce pain. Therefore, the purpose of this study was to compare TKA patients who received physical therapy (PT) and adjuvant NMES therapy versus physical therapy alone in terms of: 1) rates of manipulation under anesthesia (MUA) to treat arthrofibrosis; and 2) post-therapy range of motion (ROM)...
June 1, 2018: Surgical Technology International
https://www.readbyqxmd.com/read/29790792/dorsal-plating-for-intra-articular-middle-phalangeal-base-fractures-with-volar-instability
#8
Travis A Doering, Andrew S Greenberg, David V Tuckman
BACKGROUND: Intra-articular middle phalangeal base fractures with volar instability are rare injuries with scant literature on optimal management. Our purpose is to describe our method of dorsal plating and report postoperative outcomes. METHODS: This study is a retrospective case review of 5 patients with intra-articular middle phalangeal base fractures with volar proximal interphalangeal joint instability, measuring subjective, clinical, and radiographic outcomes...
May 1, 2018: Hand: Official Journal of the American Association for Hand Surgery
https://www.readbyqxmd.com/read/29790517/the-rotation-vibration-spectrum-of-methyl-fluoride-from-first-principles
#9
Alec Owens, Andrey Yachmenev, Jochen Küpper, Sergei N Yurchenko, Walter Thiel
Accurate ab initio calculations on the rotation-vibration spectrum of methyl fluoride (CH3F) are reported. A new nine-dimensional potential energy surface (PES) and dipole moment surface (DMS) have been generated using high-level electronic structure methods. Notably, the PES was constructed from explicitly correlated coupled cluster calculations with extrapolation to the complete basis set limit and considered additional energy corrections to account for core-valence electron correlation, higher-order coupled cluster terms beyond perturbative triples, scalar relativistic effects, and the diagonal Born-Oppenheimer correction...
May 23, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29789946/outcome-of-arthroscopic-slap-repair-using-knot-tying-suture-anchors-compared-with-knotless-suture-anchors-in-athletes
#10
Y Reinig, F Welsch, R Hoffmann, D Müller, K F Schüttler, E Zimmermann, Thomas Stein
INTRODUCTION: Arthroscopic repair is one option for the surgical treatment of type II superior labrum tears from anterior to posterior (SLAP) lesions in athletes' shoulders. MATERIALS AND METHODS: Sixty-one of 78 (78.2%) athletes were retrospectively examined after isolated arthroscopic SLAP repair (group 1/G1: 28x knot-tying anchors; group 2/G2: 33 knotless anchors; follow-up 24 months) and compared to two specific, separate matched volunteer athlete control groups (group 3/G3: 28 athletes matched to G1; group 4/G4: 33 athletes matched to G2)...
May 22, 2018: Archives of Orthopaedic and Trauma Surgery
https://www.readbyqxmd.com/read/29789904/revision-knee-arthroplasty-with-rotating-hinge-systems-in-patients-with-gross-ligament-instability
#11
Sebastian P Boelch, Joerg Arnholdt, Boris M Holzapfel, Axel Jakuscheit, Maximilian Rudert, Maik Hoberg
PURPOSE: The clinical and radiographic outcomes after revision total knee arthroplasty (TKA) for instability with two rotating hinge knee prostheses were compared. METHODS: Fifty-one patients revised for TKA instability were prospectively randomized to either the Link Endo-Model (N = 26) or the EnduRo (N = 25). Clinical and radiographic outcome scores were compared pre-operatively and at 12 months' follow-up. Failure mechanisms were recorded. RESULTS: Age, BMI, operation, and tourniquet-time did not differ significantly between groups...
May 22, 2018: International Orthopaedics
https://www.readbyqxmd.com/read/29789887/proven-accuracy-for-a-new-dynamic-gap-measurement-in-navigated-tka
#12
Volkmar Mehliß, Marco Strauch Leira, Agustín Serrano Olaizola, Wolfgang Scior, Heiko Graichen
PURPOSE: Clinical outcome of TKA remains unsatisfactory in 20% of the cases. Navigation has added accuracy in terms of alignment, but has improved clinical outcome only in small series with gap-balanced techniques. Reason for that could be that conventional gap balanced TKA determines gaps in extension and 90° of flexion only. Furthermore, measurement is only static. Therefore, the accuracy of a new dynamic navigation software which allows gap assessment throughout the entire range of motion was tested...
May 22, 2018: Knee Surgery, Sports Traumatology, Arthroscopy: Official Journal of the ESSKA
https://www.readbyqxmd.com/read/29789662/spraying-dynamics-in-continuous-wave-laser-printing-of-conductive-inks
#13
Pol Sopeña, Sergio González-Torres, Juan Marcos Fernández-Pradas, Pere Serra
Laser-induced forward transfer (LIFT), though usually associated with pulsed lasers, has been recently shown to be feasible for printing liquid inks with continuous wave (CW) lasers. This is remarkable not only because of the advantages that the new approach presents in terms of cost, but also because of the surprising transfer dynamics associated with it. In this work we carry out a study of CW-LIFT aimed at understanding the new transfer dynamics and its correlation with the printing outcomes. The CW-LIFT of lines of Ag ink at different laser powers and scan speeds revealed a range of conditions that allowed printing conductive lines with good electrical properties...
May 22, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29789404/new-approaches-for-assessing-squid-fin-motions-coupling-proper-orthogonal-decomposition-with-volumetric-particle-tracking-velocimetry
#14
Ian K Bartol, Paul S Krueger, Carly A York, Joseph T Thompson
Squids, which swim using a coupled fin/jet system powered by muscular hydrostats, pose unique challenges for the study of locomotion. The high flexibility of the fins and complex flow fields generated by distinct propulsion systems require innovative techniques for locomotive assessment. For this study, we used proper orthogonal decomposition (POD) to decouple components of the fin motions and defocusing digital particle tracking velocimetry (DDPTV) to quantify the resultant 3D flow fields. Kinematic footage and DDPTV data were collected from brief squid Lolliguncula brevis [3...
May 22, 2018: Journal of Experimental Biology
https://www.readbyqxmd.com/read/29789249/the-relationship-of-femoral-tunnel-positioning-in-medial-patellofemoral-ligament-reconstruction-on-clinical-outcome-and-postoperative-complications
#15
Philippe M Tscholl, Lukas Ernstbrunner, Linda Pedrazzoli, Sandro F Fucentese
PURPOSE: To analyze the relation of the femoral tunnel (FT) positioning on clinical outcome. METHODS: Patients with recurrent patellar dislocation who underwent medial patellofemoral ligament (MPFL) reconstruction with or without tibial tubercle osteotomy between 1998 and 2012 were included in this retrospective study. Strict postoperative lateral radiographs were mandatory. Knees with previous osseous stabilization surgery, fixed lateral patellar dislocation, valgus knee (>5°), or open growth plates were excluded...
May 19, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29789245/outcomes-of-arthroscopic-rotator-cuff-repair-in-patients-who-are-70-years-of-age-or-older-versus-under-70-years-of-age-a-sex-and-tear-size-matched-case-control-study
#16
Ji-Yong Gwark, Chang-Meen Sung, Jae-Boem Na, Hyung Bin Park
PURPOSE: To compare the structural and clinical outcomes after arthroscopic rotator cuff repair (ARCR) of a case group aged 70 and above with those of a control group younger than 70, with the 2 groups matched for sex and tear size. METHODS: The case group, comprising 53 patients 70 or older, and the control group, comprising 159 patients younger than 70, all received ARCR to 1 shoulder with symptomatic full-thickness rotator cuff tear. The case and the control subjects, who were matched for sex and tear size to minimize bias related to tendon healing, received ARCR during the same period...
May 19, 2018: Arthroscopy: the Journal of Arthroscopic & related Surgery
https://www.readbyqxmd.com/read/29788992/comparing-case-control-study-for-treatment-of-proximal-tibia-fractures-with-a-complete-metaphyseal-component-in-two-centers-with-different-distinct-strategies-fixation-with-ilizarov-frame-or-locking-plates
#17
Haakon Berven, Michael Brix, Kaywan Izadpanah, Eva Johanna Kubosch, Hagen Schmal
BACKGROUND: The purpose of this study was to compare two methods of stabilization for proximal tibia fractures (AO 41) with a complete metaphyseal component, external fixation with the Ilizarov wire frame, and internal fixation with locking plates. METHODS: Patients from two level 1 trauma centers treated between 2009 and 2015 were included in a retrospective comparing cohort study. The first center stabilized the non-pathological, proximal tibia fractures exclusively with external fixation and the second with internal plating...
May 22, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29788949/range-of-motion-after-total-knee-arthroplasty-in-hemophilic-arthropathy
#18
Radovan Kubeš, Peter Salaj, Rastislav Hromádka, Josef Včelák, Aleš Antonín Kuběna, Monika Frydrychová, Štěpán Magerský, Michal Burian, Martin Ošťádal, Jan Vaculik
BACKGROUND: Outcomes of total knee replacement in cases of hemophilic patients are worse than in patients who undergo operations due to osteoarthritis. Previous publications have reported varying rates of complications in hemophilic patients, such as infection and an unsatisfactory range of motion, which have influenced the survival of prostheses. Our retrospective study evaluated the data of hemophilic patients regarding changes in the development of the range of motion. METHODS: The data and clinical outcomes of 72 total knee replacements in 45 patients with hemophilia types A and B were reviewed retrospectively...
May 22, 2018: BMC Musculoskeletal Disorders
https://www.readbyqxmd.com/read/29788784/elbow-flexion-contractures-in-brachial-plexus-birth-injury-function-and-appearance-related-factors
#19
Emily S Ho, Karen Klar, Erin Klar, Kristen Davidge, Sevan Hopyan, Howard M Clarke
PURPOSE: The purpose of this study was to identify the functional and aesthetic factors associated with an elbow flexion contracture in children with a brachial plexus birth injury who identified their elbow flexion contracture as a problem. MATERIALS AND METHODS: A retrospective cross-sectional study of children with brachial plexus birth injury between 7 and 18 years was conducted to compare the characteristics of children who had treatment for an elbow flexion contracture with those who did not...
May 22, 2018: Disability and Rehabilitation
https://www.readbyqxmd.com/read/29788476/the-flutter-by-effect-a-comprehensive-study-of-the-fluttering-cusps-of-the-perceval-heart-valve-prosthesis
#20
Ali Aljalloud, Mohamed Shoaib, Sandrine Egron, Jessica Arias, Lachmandath Tewarie, Heike Schnoering, Shahram Lotfi, Andreas Goetzenich, Nima Hatam, Desiree Pott, Zhaoyang Zhong, Ulrich Steinseifer, Rachad Zayat, Ruediger Autschbach
OBJECTIVES: Sutureless aortic valve prostheses are gaining popularity due to the substantial reduction in cross-clamp time. In this study, we report our observations on the cusp-fluttering phenomenon of the Perceval bioprosthesis (LivaNova, London, UK) using a combination of technical and medical perspectives. METHODS: Between August 2014 and December 2016, a total of 108 patients (69% women) with a mean age of 78 years had aortic valve replacement using the Perceval bioprosthesis (34 combined procedures)...
May 17, 2018: Interactive Cardiovascular and Thoracic Surgery
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