Powered hip exoskeleton improves walking economy in individuals with above-knee amputation

Above-knee amputation severely reduces the mobility and quality of life of millions of individuals. Walking with available leg prostheses is highly inefficient, and poor walking economy is a major problem limiting mobility. Here we show that an autonomous powered hip exoskeleton assisting the residu...

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Veröffentlicht in:Nature medicine 2021-10, Vol.27 (10), p.1783-1788
Hauptverfasser: Ishmael, Marshall K., Archangeli, Dante, Lenzi, Tommaso
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Lenzi, Tommaso
description Above-knee amputation severely reduces the mobility and quality of life of millions of individuals. Walking with available leg prostheses is highly inefficient, and poor walking economy is a major problem limiting mobility. Here we show that an autonomous powered hip exoskeleton assisting the residual limb significantly improves metabolic walking economy by 15.6 ± 2.9% (mean ± s.e.m.; two-tailed paired t -test, P  = 0.002) in six individuals with above-knee amputation walking on a treadmill. The observed metabolic cost improvement is equivalent to removing a 12-kg backpack from a nonamputee individual. All participants were able to walk overground with the exoskeleton, including starting and stopping, without notable changes in gait balance or stability. This study shows that assistance of the user’s residual limb with a powered hip exoskeleton is a viable solution for improving amputee walking economy. By significantly reducing the metabolic cost of walking, the proposed hip exoskeleton may have a considerable positive impact on mobility, improving the quality of life of individuals with above-knee amputations. In individuals with above-knee amputation, a powered hip exoskeleton, which reduces the metabolic cost of walking by adding energy at the hip joint, greatly improves walking economy and has the potential to improve mobility.
doi_str_mv 10.1038/s41591-021-01515-2
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subjects 639/166/985
639/166/988
692/308/2778
Ambulation aids
Amputation
Balance
Biomedical and Life Sciences
Biomedicine
Cancer Research
Complications and side effects
Economics
Exoskeleton
Exoskeletons
Gait
Hip
Implants, Artificial
Infectious Diseases
Innovations
Knee
Metabolic Diseases
Metabolism
Mobility
Molecular Medicine
Neurosciences
Patient outcomes
Prostheses
Prosthesis
Prosthetics
Quality of life
Treadmills
Walking
title Powered hip exoskeleton improves walking economy in individuals with above-knee amputation
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