The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
Edward D. Lemaire - One of the best experts on this subject based on the ideXlab platform.
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Estimating upper extremity joint loads of persons with spinal cord injury walking with a lower extremity powered exoskeleton and forearm Crutches
Journal of biomechanics, 2020Co-Authors: Andrew Smith, Brandon N. Fournier, Julie Nantel, Edward D. LemaireAbstract:Abstract Lower extremity powered exoskeletons with Crutch support can provide upright mobility to persons with complete spinal cord injury (SCI); however, Crutch use for balance and weight transfer may increase upper extremity (UE) joint loads and injury risk. This research presented the first exoskeleton-human musculoskeletal model to estimate upper extremity biomechanics, driven by 3D motion data of persons with complete SCI walking with an exoskeleton and Crutch assistance. Forearm Crutches instrumented with strain gauges, force plates, and a 3D motion capture system were used to collect kinematic and kinetic data from five persons with complete SCI while walking with the ARKE exoskeleton. Model output estimated participant upper extremity kinematics, kinetics, and Crutch forces. Compared to inverse dynamic biomechanical Crutch model studies of persons with incomplete SCI, exoskeleton users walked with more anterior trunk tilt and twice the shoulder flexion angle. Anterior tilt increased forces and moments at the Crutch, shoulder, and Elbow. Crutch floor contact periods were 30–40% longer, resulting in upper extremity joint impulses 5 to 12 times greater than previously reported. Reducing UE joint loading is important to reduce overuse injuries associated with ambulatory assistive devices. Incorporating a variable assist ankle joint or more experience with exoskeleton walking may reduce UE joint loads, and minimise injury risk. Study outcomes provide a quantitative understanding of UE dynamics during exoskeleton walking that can be used to improve device design, training, and rehabilitation.
Winter S.l. - One of the best experts on this subject based on the ideXlab platform.
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Are current methods of partial weight-bearing instruction accurately translating to Crutch-assisted gait?
'Mark Allen Group', 2016Co-Authors: Graham Claire, Stephens D.m., Dietz K.c., Winter S.l.Abstract:YesBackground/Aims: Partial weight-bearing protocols are commonly incorporated into hospital, clinical and field-based rehabilitation to enhance recovery, particularly in patients following cartilage surgeries. Overloading can affect healing time and the stability or integrity of the healing structure, however underloading can also be detrimental, as adequate weight bearing encourages the healing process—for example, osteoblastic stimulation. Therefore, accurate reproducibility of these protocols could be considered essential to the rehabilitation process. The aim of this study was to determine the accuracy with which weight-bearing protocols (20%, 50% or 80% of body weight) could be reproduced shortly after being taught. Methods: Thirty participants were taught three partial weight-bearing protocols (20%, 50% and 80% of body weight), using bathroom scales. Participants ability to reproduce their target load for each protocol was assessed statically using bathroom scales and dynamically with a force plate using a three-point Elbow Crutch-assisted gait. Participants were assessed 10 minutes after being taught. Errors between actual and target load during these trials was calculated. Findings: Accuracy assessed with scales was comparatively good for all target loads, however dynamic trials using the force plate showed an inverse relationship between all error measures and target loads (i.e. 20% > 50% > 80% body weight; all P
Winter, Samantha L. - One of the best experts on this subject based on the ideXlab platform.
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Are current methods of partial weight-bearing instruction accurately translating to Crutch-assisted gait?
'Ovid Technologies (Wolters Kluwer Health)', 2016Co-Authors: Graham, Claire S, Stephens, Deana M, Dietz, Kristina Charlotte, Winter, Samantha L.Abstract:Background/Aims: Partial weight-bearing protocols are commonly incorporated into hospital, clinical and field-based rehabilitation to enhance recovery, particularly in patients following cartilage surgeries. Overloading can affect healing time and the stability or integrity of the healing structure, however underloading can also be detrimental, as adequate weight bearing encourages the healing process—for example, osteoblastic stimulation. Therefore, accurate reproducibility of these protocols could be considered essential to the rehabilitation process. The aim of this study was to determine the accuracy with which weight-bearing protocols (20%, 50% or 80% of body weight) could be reproduced shortly after being taught. Methods: Thirty participants were taught three partial weight-bearing protocols (20%, 50% and 80% of body weight), using bathroom scales. Participants ability to reproduce their target load for each protocol was assessed statically using bathroom scales and dynamically with a force plate using a three-point Elbow Crutch-assisted gait. Participants were assessed 10 minutes after being taught. Errors between actual and target load during these trials was calculated. Findings: Accuracy assessed with scales was comparatively good for all target loads, however dynamic trials using the force plate showed an inverse relationship between all error measures and target loads (i.e. 20% > 50% > 80% body weight; all P
Andrew Smith - One of the best experts on this subject based on the ideXlab platform.
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Estimating upper extremity joint loads of persons with spinal cord injury walking with a lower extremity powered exoskeleton and forearm Crutches
Journal of biomechanics, 2020Co-Authors: Andrew Smith, Brandon N. Fournier, Julie Nantel, Edward D. LemaireAbstract:Abstract Lower extremity powered exoskeletons with Crutch support can provide upright mobility to persons with complete spinal cord injury (SCI); however, Crutch use for balance and weight transfer may increase upper extremity (UE) joint loads and injury risk. This research presented the first exoskeleton-human musculoskeletal model to estimate upper extremity biomechanics, driven by 3D motion data of persons with complete SCI walking with an exoskeleton and Crutch assistance. Forearm Crutches instrumented with strain gauges, force plates, and a 3D motion capture system were used to collect kinematic and kinetic data from five persons with complete SCI while walking with the ARKE exoskeleton. Model output estimated participant upper extremity kinematics, kinetics, and Crutch forces. Compared to inverse dynamic biomechanical Crutch model studies of persons with incomplete SCI, exoskeleton users walked with more anterior trunk tilt and twice the shoulder flexion angle. Anterior tilt increased forces and moments at the Crutch, shoulder, and Elbow. Crutch floor contact periods were 30–40% longer, resulting in upper extremity joint impulses 5 to 12 times greater than previously reported. Reducing UE joint loading is important to reduce overuse injuries associated with ambulatory assistive devices. Incorporating a variable assist ankle joint or more experience with exoskeleton walking may reduce UE joint loads, and minimise injury risk. Study outcomes provide a quantitative understanding of UE dynamics during exoskeleton walking that can be used to improve device design, training, and rehabilitation.
Zacchaeus Olawale Oladokun - One of the best experts on this subject based on the ideXlab platform.
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Energy Expenditure of Stair Climbing with Elbow and Axillary Crutches
Physiotherapy, 2002Co-Authors: Rufus A. Adedoyin, Adeoye Joshua Opayinka, Zacchaeus Olawale OladokunAbstract:Summary The purpose of this study was to investigate the energy cost of stair climbing using axillary and Elbow Crutches. The cardiovascular responses of 60 normal male undergraduate subjects were studied during unassisted and non-weight-bearing staircase ambulation with axillary Crutches and Elbow Crutches. The subjects climbed 13 steps 7.1 metres long and 1.95 metres high, at their preferred speed. The cardiovascular parameters measured were systolic blood pressure, diastolic blood pressure and heart rate. The rate pressure product was calculated from the product of systolic blood pressure and heart rate. The analysis of variance demonstrated a significant result (p Post hoc analysis showed differences between unassisted stair climbing and both axillary and Elbow Crutch conditions. However, there was no difference in energy expenditure between axillary and Elbow Crutch ambulation.