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Adrien Cerrito, Peter Milburn, Clair Alston-Knox, Kerrie Evans
The aim of this study was to compare cervical spine kinematics in rugby union front row players during machine-based and "live" scrummaging. Cervical spine kinematics was measured via electromagnetic tracking of sensors attached to the head and thorax. Joint angles were extracted from each trial at two time points ("bind" prior to engagement and instant of impact) for comparison between scrummaging conditions. The effect of scrummaging condition on kinematics was evaluated using a mixed effects model and estimations were based on a Bayesian framework...
February 19, 2019: Journal of Sports Sciences
Thushara Perera, Wee-Lih Lee, Mary Jones, Joy L Tan, Elizabeth L Proud, Angus Begg, Nicholas C Sinclair, Richard Peppard, Hugh J McDermott
BACKGROUND: Parkinsonian rigidity is identified on clinical examination as resistance to passive movement. Measurement of rigidity commonly relies on ordinal rating scales (MDS-UPDRS), however instrumented objective measures may provide greater mechanistic insight. NEW METHOD: We present a palm-worn instrument to objectively quantify rigidity on a continuous scale. The device employs a miniature motor to flex the third digit of the hand about the metacarpophalangeal joint whilst transducers record flexion/extension forces...
February 15, 2019: Journal of Neuroscience Methods
Asmâa Biaz, Jean Uwingabiye, Elmostafa Benaissa, Emmanuel Millbank Owusu, Samira El Machtani Idrissi, Abdellah Dami, Zohra Ouzzif, Sanae Bouhsain
BACKGROUND: The authors report a clinical case where biological interference rendered the electrophoretic trace of serum proteins obtained by capillary electrophoresis as uninterpretable. METHODS: Electrophoresis of serum proteins and immunotyping immunoassay were performed on Capillary 2 Flex Piercing® Sebia. RESULTS: A 72-year-old male patient was hospitalized in the clinical hematology department for deep lymphadenopathies with hepatocellular failure...
January 1, 2019: Clinical Laboratory
Yasushi Matsui, Shoji Takayanagi, Takuya Ohira, Masahiro Watanabe, Hiroki Murano, Yasufumi Furuhata, Shumpei Miyakawa
[Purpose] The aim of this study was to determine whether the consumption of a leucine-enriched essential amino acid mixture (LEAA), which is known to increase protein synthesis in muscles, alleviates muscle damage and accelerates recovery by ameliorating muscle damage. [Participants and Methods] A double-blind, randomized crossover trial was conducted over a 5-week period. Ten untrained males (age, 23.0 ± 1.6 years) were asked to repeatedly flex and extend their elbows for 10 counts/set × 5 sets at full power while using a dynamometer...
January 2019: Journal of Physical Therapy Science
Jun Sato, Atsuko Kato, Sho Takeda, Hiroshi Nishikawa
We report a 7-year-old male patient who developed severe atrioventricular block after transcatheter closure of the atrial septal defect with an Occlutech Figulla® Flex II ASD occluder (FSO). He had a small aortic rim and the defect measuring 22.3 mm by balloon sizing. When a 24 mm FSO was deployed, he developed Wenckebach second-degree heart block; however, it recovered to sinus rhythm. Hence, the device was implanted. The rhythm deteriorated to a fixed 2:1 heart block within 7 hr. He underwent surgical retrieval of the device and closure of the defect...
February 17, 2019: Catheterization and Cardiovascular Interventions
Aïda M Valevicius, Quinn A Boser, Ewen B Lavoie, Craig S Chapman, Patrick M Pilarski, Jacqueline S Hebert, Albert H Vette
BACKGROUND: Optical motion capture is a powerful tool for assessing upper body kinematics, including compensatory movements, in different populations. However, the lack of a standardized protocol with clear functional relevance hinders its clinical acceptance. RESEARCH QUESTION: The objective of this study was to use motion capture to: (1) characterize angular joint kinematics in a normative population performing two complex, yet standardized upper limb tasks with clear functional relevance; and (2) assess the protocol's intra-rater reliability...
January 28, 2019: Gait & Posture
Lorenz Immler, Kurt Schindelwig, Dieter Heinrich, Werner Nachbauer
OBJECTIVES: Ski boots are designed to transfer forces from skier to ski. This transfer is among others affected by the flexion stiffness (FS) and so effects safety and skiing performance. Previous studies have used devices with prosthetic legs to evaluate FS, however, influencing factors like the foot and lower leg shape or individual buckle closure are not considered. The purpose of the study was to (i) develop a device to measure the individual flexion stiffness (IFS) of ski boots worn by skiers, to (ii) determine the repeatability of the measurement, and to (iii) compare the IFS with the nominal flex index of the manufacturers...
January 29, 2019: Journal of Science and Medicine in Sport
Andrew B Udofa, Kenneth P Clark, Laurence J Ryan, Peter G Weyand
Although running shoes alter foot-ground reaction forces, particularly during impact, how they do so is incompletely understood. Here, we hypothesized that footwear effects on running ground reaction force-time patterns can be accurately predicted from the motion of two components of the body's mass ( mb ): the contacting lower-limb ( m1 =0.08• mb ) and the remainder ( m2 =0.92• mb ). Simultaneous motion and vertical ground reaction force-time data were acquired at 1,000 Hz from eight uninstructed subjects running on a force-instrumented treadmill at 4...
February 14, 2019: Journal of Applied Physiology
Azeem A Rehman, Ryan C Turner, Stephanie Wright, SoHyun Boo, Ansaar T Rai
A middle-aged patient presented with posterior circulation symptoms attributable to a large eccentric basilar trunk aneurysm. The planned treatment was flow diversion with loose coil packing which was successfully performed using a Pipeline Flex device deployed from the basilar to the left posterior cerebral artery. The complete procedure including live biplane fluoroscopy was digitally recorded. The patient had symptomatic improvement postoperatively and was discharged on day 1. The patient suffered a cardiac arrest on postoperative day 3 secondary to massive intraventricular and subarachnoid hemorrhage...
February 13, 2019: Journal of Neurointerventional Surgery
Ashkan Rashad, Max Heiland, Patrick Hiepe, Alireza Nasirpour, Carsten Rendenbach, Jens Keuchel, Marc Regier, Ahmed Al-Dam
BACKGROUND: Rigid image co-registration is an established technique that allows spatial aligning. However, rigid fusion is prone to deformation of the imaged anatomies. In this work, a novel fully automated elastic image registration method is evaluated. METHODS: Cervical CT and MRI data of ten patients were evaluated. The MRI was acquired with the patient in neutral, flexed and rotated head position. Vertebra-wise rigid fusions were performed to transfer bony landmarks for each vertebra from the CT to the MRI space serving as a reference...
February 13, 2019: International Journal of Medical Robotics + Computer Assisted Surgery: MRCAS
Dan Aravot, Yaron D Barac, Efrat Krutzwald-Josefson, Aaron M Allen, Dov Flex, Nir Peled, Mordechai R Kramer, Yuri Peysakhovich, Milton Saute
The original article [1] contained an error whereby all authors' names were mistakenly inverted. This error has now been corrected.
February 12, 2019: Journal of Cardiothoracic Surgery
Giuseppina Esposito, Giovanni Mettivier, Kristina Bliznakova, Zhivko Bliznakov, Hilde Bosmans, Alberto Bravin, Ivan Buliev, Francesca Di Lillo, Danail Ivanov, Martina Minutillo, Antonio Sarno, Janne Vignero, Paolo Russo
3D breast modelling for 2D and 3D breast X-ray imaging would benefit from the availability of digital and physical phantoms that reproduce accurately the complexity of the breast anatomy. While a number of groups have produced digital phantoms with increasing level of complexity, physical phantoms reproducing that software approach have been scarcely developed. One possibility is offered by 3D printing technology. This implies the assessment of the energy dependent absorption index β of 3D printing materials for absorption based imaging, as well as the assessment of the refractive index decrement, δ, of the material, for phase contrast imaging studies, at the energies of interest for breast imaging...
February 12, 2019: Physics in Medicine and Biology
Mitsuhiro Masaki, Xiang Ji, Taishi Yamauchi, Hiroshige Tateuchi, Noriaki Ichihashi
PURPOSE: The present study aimed to clarify the effects of the trunk position on muscle stiffness that reflects elongation of the lumbar erector spinae and lumbar multifidus muscles using ultrasonic shear wave elastography (SWE). METHODS: The study included ten healthy men. The shear elastic modulus of the left lumbar erector spinae and lumbar multifidus muscles were evaluated using ultrasonic SWE. Measurement postures for the left lumbar erector spinae muscle were (1) prone position (Rest), (2) sitting position with the trunk flexed (Flexion), (3) the Flexion position adding right trunk lateral flexion (Flexion-Lateral Flexion), and (4) the Flexion position adding right trunk rotation (Flexion-Rotation 1)...
February 12, 2019: European Journal of Applied Physiology
Andri Maruli Tua Lubis, Troydimas Panjaitan, Charles Hoo
INTRODUCTION: Recurrent patellar dislocation can lead to articular cartilage injury. We report a 21-year old male with left patella instability and articular cartilage defect. PRESENTATION OF CASE: A 21-year-old male presented with left patellar instability and pain. Knee range of motion (ROM) was limited when patella was dislocated (0-20°). The J-sign positive, patellar apprehension test was positive, with medial patella elasticity/patellar glide >2 quadrants...
January 31, 2019: International Journal of Surgery Case Reports
Yuhuan Meng, Taichong Ma, Felippe J Pavinatto, J Devin MacKenzie
A new approach to stable, low resistance inexpensive printed flexible conductive inks is proposed. Silver ink has been studied extensively and commercialized for applications in printed electronics due to the inherent high conductivity and stability of silver, even in particulate-based percolation networks processed at temperatures compatible with low cost polymer films such as polyethylene terephthalate (PET). Recent interest in flexible and even stretchable circuits, however, has presented new challenges for particle-based inks as mechanical strains can result in the opening of critical particle-to-particle contacts...
February 11, 2019: ACS Applied Materials & Interfaces
E C Müller, K-H Frosch
With 1% of all skeletal fractures patellar fractures are rare. The majority of cases are caused by a direct trauma to the flexed knee. The diagnosis is made via the injury mechanism as well as the physical and radiological findings. In conventional x‑ray imaging the extent of injury often is underrated, which mostly leads to the necessity of a computed tomography (CT) scan. The aim of the treatment is the reconstruction of the extensor mechanism and the anatomical reconstruction of the articular surface...
February 11, 2019: Der Chirurg; Zeitschrift Für Alle Gebiete der Operativen Medizen
Ravi Charan Ailneni, Kartheek Reddy Syamala, In-Sop Kim, Jaejin Hwang
BACKGROUND: Flexed head and neck postures are associated with the development of neck pain in the office environment. There is little evidence regarding whether a wearable posture sensor would improve the head and neck postures of office workers. OBJECTIVE: The aim of this study was to evaluate the effect of the wearable posture sensor on the posture and physical demands on the head and neck during office work. METHODS: Nineteen participants performed a typing task with and without the wearable sensor in the sitting and standing positions...
2019: Work: a Journal of Prevention, Assessment, and Rehabilitation
Benjamin Stone, Barry S Mason, Martin B Warner, Vicky L Goosey-Tolfrey
Current knowledge on recumbent handbike configuration and handcycling technique is limited. The purpose of this study was to evaluate and compare the upper limb kinematics and handbike configurations of recreational and competitive recumbent handcyclists, during sport specific intensities. Thirteen handcyclists were divided into two significantly different groups based on peak aerobic power output (POpeak ) and race experience; competitive (n=7; 5 H3 and 2 H4 classes; POpeak : 247±20W) and recreational (n=6; 4 H3 and 2 H4 classes; POpeak : 198±21 W)...
February 10, 2019: Scandinavian Journal of Medicine & Science in Sports
Miranda M Brun, Laura Holloway, Amanda Oleksy, Jan Dayton, Mathew P Estey, Bobbi-Lynn Goudreau, Anna K Füzéry
Objectives: Many hospitals cannot afford an hCG assay on a central lab analyzer and turn to point of care testing (POCT) solutions. The Radiometer AQT90 FLEX is a small benchtop immunoareement between the AQT90 and comparator methods for samples with hCG ssay analyzer for use in the laboratory or at the patient bedside. This study evaluated the analytical performance of the AQT90's βhCG assay. Methods: Precision was assessed using whole blood patient samples and two levels of quality control...
March 2019: Practical Laboratory Medicine
Nicklaus Redenius, Youngwon Kim, Wonwoo Byun
BACKGROUND: Recent advances in sensor technologies have promoted the use of consumer-based accelerometers such as Fitbit Flex in epidemiological and clinical research; however, the validity of the Fitbit Flex in measuring sedentary behavior (SED) and physical activity (PA) has not been fully determined against previously validated research-grade accelerometers such as ActiGraph GT3X+. Therefore, the purpose of this study was to examine the concurrent validity of the Fitbit Flex against ActiGraph GT3X+ in a free-living condition...
February 7, 2019: BMC Medical Research Methodology
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