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https://www.readbyqxmd.com/read/29146151/a-new-two-component-compression-system-turning-an-elastic-bandage-into-an-inelastic-compression-device-interface-pressure-stiffness-and-haemodynamic-effectiveness
#1
Giovanni Mosti, Hugo Partsch
INTRODUCTION: Bandage application does not exert consistent compression pressure, leading to extremely variable compression when applied to patients. A new elastic bandage can exert a predefined pressure independently of healthcare providers and the size of the wrapped limb. The bandage system includes a series of non-stretchable patches that when applied to the bandage make it stiff. The aim of this work was to assess, in an experimental setting, the venous ejection fraction (EF) from the lower leg and the tolerability of this new bandage in a group of patients affected by superficial venous incompetence...
November 13, 2017: European Journal of Vascular and Endovascular Surgery
https://www.readbyqxmd.com/read/29143379/region-dependent-hamstrings-activity-in-nordic-hamstring-exercise-and-stiff-leg-deadlift-defined-with-high-density-emg
#2
András Hegyi, Annamária Péter, Taija Finni, Neil J Cronin
Recent studies suggest region-specific metabolic activity in hamstring muscles during injury prevention exercises, but the neural representation of this phenomenon is unknown. The aim of this study was to examine whether regional differences are evident in the activity of biceps femoris long head (BFlh) and semitendinosus (ST) muscles during two common injury prevention exercises. Twelve male participants without a history of hamstring injury performed the Nordic hamstring exercise (NHE) and stiff-leg deadlift (SDL) while BFlh and ST activity were recorded with high-density electromyography (HD-EMG)...
November 15, 2017: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29131753/effectiveness-of-compression-bandaging-education-for-wound-care-nurses
#3
D Tidhar, E Keren, G Brandin, M Yogev, J M Armer
OBJECTIVE: Compression bandaging is an essential component in the treatment of venous leg ulcers (VLUs). An adequate pressure and stiffness is needed in order for the treatment to be successful. The aim of this study was to evaluate the effectiveness of a training workshop on compression bandaging among wound care nurses who had no previous experience in application of compression bandages, immediately post-training and six months after training. METHOD: A quasi-experimental design, conducted at Maccabi Healthcare Services, in which nurses underwent a four-hour educational session, including practising with a device that measures sub-bandage pressure...
November 2, 2017: Journal of Wound Care
https://www.readbyqxmd.com/read/29097056/a-community-based-bionic-leg-rehabilitation-program-for-patients-with-chronic-stroke-clinical-trial-protocol
#4
Amy Wright, Keeron Stone, Danielle Lambrick, Simon Fryer, Lee Stoner, Edward Tasker, Simon Jobson, Grace Smith, John Batten, Jo Batey, Vicky Hudson, Helen Hobbs, James Faulkner
Stroke is a major global health problem whereby many survivors have unmet needs concerning mobility during recovery. As such, the use of robotic-assisted devices (i.e., a bionic leg) within a community setting may be an important adjunct to normal physiotherapy in chronic stroke survivors. This study will be a dual-center, randomized, parallel group clinical trial to investigate the impact of a community-based training program using a bionic leg on biomechanical, cardiovascular, and functional outcomes in stroke survivors...
October 30, 2017: Journal of Stroke and Cerebrovascular Diseases: the Official Journal of National Stroke Association
https://www.readbyqxmd.com/read/29084097/differential-effects-of-different-warm-up-protocols-on-repeated-sprints-induced-muscle-damage
#5
Che-Hsiu Chen, Xin Ye, Yi-Tse Wang, Yung-Sheng Chen, Wei-Chin Tseng
The purpose of this investigation was to examine whether adding a set of hamstring resistance exercise or dynamic stretching to a regular running-based warm-up before a bout of repeated sprints provides protective effects against the sprinting-induced muscle damage. Twelve elite tennis players participated in this study. After the familiarization, subjects completed 3 separate randomly sequenced experimental visits, during which 3 different warm-up interventions were performed before the muscle-damaging protocol (12 sets of 30-m maximal repeated sprints): 5 minutes of running (control); control with single leg slide curl (SLC); and control with active hamstring stretching (AHS)...
October 27, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29076958/gluteus-maximus-and-hamstring-activation-during-selected-weight-bearing-resistance-exercises
#6
Kevin McCurdy, John Walker, Derrick Yuen
McCurdy, K, Walker, J, and Yuen, D. Gluteus maximus and hamstring activation during selected weight-bearing resistance exercises. J Strength Cond Res XX(X): 000-000, 2017-The purpose of this study was to compare the gluteus maximus (GM) and hamstring group (HG) electromyographic (EMG) activation levels among selected weight-bearing resistance exercises. Eighteen young adult females with previous resistance training experience completed the study. Strength was assessed on the bilateral squat (BS) (3 repetition maximum [RM]), modified single-leg squat (MSLS) (3RM), and stiff-leg deadlift (SLDL) (8RM) to determine an 8RM load for all lifts...
October 20, 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29065079/leg-stiffness-in-female-soccer-players-intersession-reliability-and-the-fatiguing-effects-of-soccer-specific-exercise
#7
Mark B A De Ste Croix, Jonathan D Hughes, Rhodri S Lloyd, Jon L Oliver, Paul J Read
De Ste Croix, MBA, Hughes, JD, Lloyd, RS, Oliver, JL, and Read, PJ. Leg stiffness in female soccer players: intersession reliability and the fatiguing effects of soccer-specific exercise. J Strength Cond Res 31(11): 3052-3058, 2016-Low levels of leg stiffness and reduced leg stiffness when fatigue is present compromise physical performance and increase injury risk. The purpose of this study was to (a) determine the reliability of leg stiffness measures obtained from contact mat data and (b) explore age-related differences in leg stiffness after exposure to a soccer-specific fatigue protocol in young female soccer players...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29065078/biomechanical-differences-of-multidirectional-jump-landings-among-female-basketball-and-soccer-players
#8
Jeffrey B Taylor, Kevin R Ford, Randy J Schmitz, Scott E Ross, Terry A Ackerman, Sandra J Shultz
Taylor, JB, Ford, KR, Schmitz, RJ, Ross, SE, Ackerman, TA, and Shultz, SJ. Biomechanical differences of multidirectional jump landings among female basketball and soccer players. J Strength Cond Res 31(11): 3034-3045, 2017-Anterior cruciate ligament (ACL) injury prevention programs are less successful in basketball than soccer and may be due to distinct movement strategies that these athletes develop from sport-specific training. The purpose of this study was to identify biomechanical differences between female basketball and soccer players during multidirectional jump landings...
November 2017: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/29060601/tarsusmeter-development-of-a-wearable-device-for-ankle-joint-impedance-estimation
#9
Modar Hassan, Keisuke Yagi, Kaiwen Hsiao, Hiromi Mochiyama, Kenji Suzuki
We present the development and basic evaluation of a new wearable device for estimation of ankle joint impedance called Tarsusmeter. The device is intended for application with persons with locomotion disabilities to quantify the ankle joint impedance, especially in cases of spasticity where the joint's impedance is expected to differ significantly from healthy persons. The lack of a simple and light weight solution to provide objective evaluation of ankle joint impedance motivates the design criteria of this device to be as such...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29060018/modeling-and-analysis-of-individual-with-lower-extremity-amputation-locomotion-using-prosthetic-feet-and-running-specific-prostheses
#10
Akihiko Murai, Hiroaki Hobara, Satoru Hashizume, Yoshiyuki Kobayashi, Mitsunori Tada
Prostheses have enabled individuals with lower extremity amputation (ILEAs) to accomplish many daily activities. Prosthetic feet allow ILEA to locomote and improves their quality of life. Carbon-fiber running-specific prostheses (RSPs) with energy storing capabilities support ILEAs to perform sprinting by partly providing spring-like properties in their amputated legs. Previous studies declare the spring-like RSP behavior and stiffness regulation during ILEA sprinting using RSP, though little is known about the behavior of the whole system that is a complex combination of human body and prostheses...
July 2017: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/29053605/flexible-sensors-for-pressure-therapy-effect-of-substrate-curvature-and-stiffness-on-sensor-performance
#11
Iryna Khodasevych, Suresh Parmar, Olga Troynikov
Flexible pressure sensors are increasingly being used in medical and non-medical applications, and particularly in innovative health monitoring. Their efficacy in medical applications such as compression therapy depends on the accuracy and repeatability of their output, which in turn depend on factors such as sensor type, shape, pressure range, and conformability of the sensor to the body surface. Numerous researchers have examined the effects of sensor type and shape, but little information is available on the effect of human body parameters such as support surfaces' curvature and the stiffness of soft tissues on pressure sensing performance...
October 20, 2017: Sensors
https://www.readbyqxmd.com/read/29051334/case-studies-in-physiology-the-biomechanics-of-the-fastest-sprinter-with-a-unilateral-transtibial-amputation
#12
Owen N Beck, Alena Marie Grabowski
People have debated whether athletes with transtibial amputations should compete with non-amputees in track events despite insufficient information regarding how the use of running-specific prostheses affects athletic performance. Thus, we sought to quantify the spatio-temporal variables, ground reaction forces, and spring-mass mechanics of the fastest athlete with a unilateral transtibial amputation using an RSP to reveal how he adapts his biomechanics to achieve elite running speeds. Accordingly, we measured ground reaction forces during treadmill running trials spanning 2...
October 19, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29050822/a-comparison-and-update-of-direct-kinematic-kinetic-models-of-leg-stiffness-in-human-running
#13
Bernard X W Liew, Susan Morris, Ashleigh Masters, Kevin Netto
Direct kinematic-kinetic modelling currently represents the "Gold-standard" in leg stiffness quantification during three-dimensional (3D) motion capture experiments. However, the medial-lateral components of ground reaction force and leg length have been neglected in current leg stiffness formulations. It is unknown if accounting for all 3D would alter healthy biologic estimates of leg stiffness, compared to present direct modelling methods. This study compared running leg stiffness derived from a new method (multiplanar method) which includes all three Cartesian axes, against current methods which either only include the vertical axis (line method) or only the plane of progression (uniplanar method)...
October 6, 2017: Journal of Biomechanics
https://www.readbyqxmd.com/read/29044664/a-new-technique-of-surgical-planning-for-anterior-cruciate-ligament-reconstruction-feasibility-assessment-of-shear-wave-elastography-to-tendon-of-semitendinosus-muscle
#14
Yoshiaki Itoigawa, Yuji Takazawa, Yuichiro Maruyama, Keiichi Yoshida, Tatsuo Sakai, Koichiro Ichimura, Kazuo Kaneko
There is currently no method to quantify the quality of the harvested graft before anterior cruciate ligament (ACL) reconstruction. The purpose of the present study was to explore a method for measuring stiffness of the normal tendon of the semitendinosus muscle using shear wave elastography (SWE). Our investigation comprised two steps. First, we determined orientation of the semitendinosus tendon fibers in 20 lower legs of embalmed cadavers. Second, we investigated the feasibility of quantifying stiffness of the normal semitendinosus tendon by SWE in 24 subjects (48 legs: 24 male and 24 female subjects) in vivo...
October 17, 2017: Clinical Anatomy
https://www.readbyqxmd.com/read/29039128/distal-femoral-flexion-deformity-from-growth-disturbance-treated-with-a-two-level-osteotomy-and-internal-lengthening-nail
#15
Austin T Fragomen, Fiona R Fragomen
Salter Harris fractures of the distal femur can lead to growth disturbance with resulting leg length inequality and knee deformity. We have looked at a case series (3) of patients who presented with a distal femur flexion malunion and shortening treated with a distal femoral osteotomy and plating and a proximal femoral osteotomy with a magnetic internal lengthening nail. Does a two-level osteotomy and internal fixation approach provide a reliable result both radiographically and functionally? The average knee extension loss was 12°, LLD 47 mm, PDFA 65°, MAD 2 mm...
November 2017: Strategies in Trauma and Limb Reconstruction
https://www.readbyqxmd.com/read/29038526/strain-in-shock-loaded-skeletal-muscle-and-the-time-scale-of-muscular-wobbling-mass-dynamics
#16
Kasper B Christensen, Michael Günther, Syn Schmitt, Tobias Siebert
In terrestrial locomotion, muscles undergo damped oscillations in response to limb impacts with the ground. Muscles are also actuators that generate mechanical power to allow locomotion. The corresponding elementary contractile process is the work stroke of an actin-myosin cross-bridge, which may be forcibly detached by superposed oscillations. By experimentally emulating rat leg impacts, we found that full activity and non-fatigue must meet to possibly prevent forcible cross-bridge detachment. Because submaximal muscle force represents the ordinary locomotor condition, our results show that forcible, eccentric cross-bridge detachment is a common, physiological process even during isometric muscle contractions...
October 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29037358/superimposition-of-elastic-and-nonelastic-compression-bandages
#17
Fanette Chassagne, Clothilde Helouin-Desenne, Jérome Molimard, Reynald Convert, Pierre Badel, Pascal Giraux
OBJECTIVE: The objective of this study was to investigate the pressure applied by superimposed bandages and to compare it with the pressure applied by single-component bandages. METHODS: Six different bandages, composed of one elastic bandage, one nonelastic bandage, or both, were applied in a spiral pattern on both legs of 25 patients at risk of venous thrombosis as a consequence of central or peripheral motor deficiency. Pressure was measured at four measurement points on the leg (B1 and C on the medial and lateral sides of the leg) and in three positions: supine, sitting, and standing...
November 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/29020705/mechanical-strength-of-the-proximal-tibia-following-total-knee-arthroplasty-a-cadaveric-study-of-resection-depth-and-bone-density
#18
Tatsuya Sueyoshi, Scott R Small, Jeffrey B Elliott, Grace E Gibbs, Ryan B Seale, Merrill A Ritter
BACKGROUND: Tibial component failure has been a problem in total knee arthroplasty, it is still undetermined how tibial resection depth affects the strength to support a tibial component. This study examined the relationship between the resection depth and the bone density and the mechanical strength to support the tibial component. MATERIALS AND METHODS: Eight matched pairs of fresh, frozen cadaver lower legs were imaged with computed tomography to assess the bone density...
October 12, 2017: Surgical Technology International
https://www.readbyqxmd.com/read/28991043/kinetic-compensations-due-to-chronic-ankle-instability-during-landing-and-jumping
#19
Hyunsoo Kim, S Jun Son, Matthew K Seeley, J Ty Hopkins
INTRODUCTION: Skeletal muscles absorb and transfer kinetic energy during landing and jumping, which are common requirements of various forms of physical activity. Chronic ankle instability (CAI) is associated with impaired neuromuscular control and dynamic stability of the lower extremity. Little is known regarding an intra-limb, lower-extremity joint coordination of kinetics during landing and jumping for CAI patients. We investigated the effect of CAI on lower-extremity joint stiffness, and kinetic and energetic patterns across the ground contact phase of landing and jumping...
October 3, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28987766/nervous-system-excitability-and-joint-stiffness-following-short-term-dynamic-ankle-immobilization
#20
Alyssa M Stirling, Jeffrey M McBride, Edward K Merritt, Alan R Needle
Joint immobilization has been demonstrated to modify neural excitability in subsets of healthy populations, leading to disinhibition of cortical and reflexive pathways. However, these findings may have limited clinical application as most models have investigated casting and rigid immobilization, while many musculoskeletal injuries often utilize dynamic immobilization devices such as boot immobilizers and pneumatic splints that allow for modified ambulation. We therefore aimed to determine the short-term effects of ambulation in ankle immobilization devices on nervous system excitability and stiffness in able-bodied individuals...
September 23, 2017: Gait & Posture
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