Powered hip exoskeleton improves walking economy in individuals with above-knee amputation
Powered hip exoskeleton improves walking economy in individuals with above-knee amputation
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DOI：
10.1038/s41591-021-01515-2
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发表时间：
2021-10-11
期刊：
影响因子：
82.9
通讯作者：
Lenzi, Tommaso
中科院分区：
文献类型：
--
作者：
Ishmael, Marshall K.;Archangeli, Dante;Lenzi, Tommaso
膝关节截肢严重降低了数百万人的活动能力和生活质量。使用可用的腿假体行走是非常低效的，并且较差的行走经济性是限制移动性的主要问题。在这里，我们表明，一个自主动力髋关节外骨骼辅助残肢显着提高代谢步行经济性15.6 +/- 2.9%（平均+/-标准误差;双尾配对t检验，P = 0.002）。观察到的代谢成本改善相当于从非截肢者身上卸下一个12公斤的背包。所有参与者都能够使用外骨骼在地面上行走，包括开始和停止，步态平衡或稳定性没有明显变化。这项研究表明，使用者的残肢与动力髋外骨骼的援助是一个可行的解决方案，提高截肢者步行经济。通过显著降低行走的代谢成本，所提出的髋关节外骨骼可能对移动性产生相当大的积极影响，改善膝上截肢者的生活质量。在膝上截肢者中，动力髋关节外骨骼通过在髋关节处增加能量来降低行走的代谢成本，极大地提高了行走的经济性，并且具有改善移动性的潜力。
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.