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首页> 外文期刊>Journal of prosthetics and orthotics: JPO >Realtime Visual Feedback Diminishes Energy Consumption of Amputee Subjects During Treadmill Locomotion
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Realtime Visual Feedback Diminishes Energy Consumption of Amputee Subjects During Treadmill Locomotion

机译：实时视觉反馈减少了跑步机运动过程中被截肢者的能源消耗

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摘要

Approximately 173,000 people in the United States are using lower limb prostheses. Although the design and use of prostheses have improved during the past 10 years, problems with energy expenditure still affect the gait of amputee patients. Realtime visual feedback (RTFV) has been shown to have an immediate effect on gait symmetry, although the effect on energy consumption was not measured. The aim of this study was to test the hypothesis that as amputees walk more symmetrically with the aid of RTVF, there will be a reduction in their oxygen consumption. Eleven amputee patients (mean age, 46 years; range, 36-58 years) participated. Three subjects were transfemoral amputee patients. Five tests were conducted for each subject: tests 1 and 5 were tests with no visual feedback, whereas tests 2, 3, and 4 involved walking while watching a computer screen that showed (1) left and right stance/swing ratios, (2) left versus right peak push-off forces and (3) a graph in which vertical and anteroposterior shear forces under each foot are plotted as vectors alongside each other, forming a so-called butterfly plot. As expected, there was a significant negative correlation between residual limb length and energy consumption during gait. In terms of possible future rehabilitation strategies, it was found that with each form of visual feedback there were significant improvements in both heart rate and oxygen consumption. In addition, the actual symmetry for the three forms of feedback improved across all subjects, indicating that the statistically significant improvements were not attributable to a placebo-type effect. The conclusion from these data is that RTVF not only results in an immediate improvement in symmetry, but there are also concomitant reductions in heart rate and oxygen consumption while walking at a steady pace on a treadmill. This implies that RTVF may serve as a useful aid in the successful rehabilitation of amputee patients.
机译：在美国，大约有173,000人在使用下肢假肢。尽管在过去的10年中假体的设计和使用有所改善，但是能量消耗方面的问题仍然影响截肢患者的步态。实时视觉反馈（RTFV）已显示对步态对称性有直接影响，尽管并未测量对能量消耗的影响。这项研究的目的是检验以下假设：当截肢者借助RTVF行走更对称时，其氧气消耗量将减少。参加了11名截肢患者（平均年龄46岁;范围36-58岁）。三名受试者是经股截肢患者。对每个受试者进行了五项测试：测试1和5是没有视觉反馈的测试，而测试2、3和4则是在观看显示（1）左右姿态/摇摆比的计算机屏幕的同时进行步行，（2）左与右峰值推力和（3）曲线图，其中将每只脚下的垂直和前后剪力绘制为矢量，彼此并排，形成所谓的蝴蝶图。不出所料，步态期间残肢长度与能量消耗之间存在显着的负相关。根据未来可能的康复策略，发现每种形式的视觉反馈都可以显着改善心率和耗氧量。此外，三种形式反馈的实际对称性在所有受试者中均有改善，表明统计学上的显着改善并非归因于安慰剂型效应。从这些数据得出的结论是，RTVF不仅可以使对称性立即得到改善，而且在跑步机上以稳定的速度行走时，心率和氧气消耗也随之降低。这意味着RTVF可以作为成功帮助截肢患者康复的有用工具。

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