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首页> 外文期刊>Journal of prosthetics and orthotics: JPO >The Effective Foot Length Ratio: A Potential Tool for Characterization and Evaluation of Prosthetic Feet
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The Effective Foot Length Ratio: A Potential Tool for Characterization and Evaluation of Prosthetic Feet

机译：有效脚长比：表征和评估假脚的潜在工具

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摘要

The purpose of this technical note is to introduce the effective foot length ratio (EFLR) as a possible measurement tool for evaluation of prosthetic feet. The EFLR multiplied by 100 provides the percentage of a foot that is effectively used during a walking step and may have clinical implications for step length and limb loading on the contralateral side. Prosthetic feet were manually rolled over a force platform while maintaining a constant level of force representative of a user's weight. Effective foot lengths were measured by finding the distance from the heel of each prosthetic foot to the center of pressure in foot-based coordinates at a loading angle that represented the approximate shank angle at opposite heel contact during walking. The effective foot lengths were then normalized by overall foot length to determine the EFLR. EFLRs from 15 prosthetic feet used clinically during the 1990s are presented along with an estimate of the EFLR of the physiologic ankle-foot system. All prosthetic feet had EFLRs lower than the corresponding physiologic system, although some had ratios close to the physiologic system. The EFLRs for the prosthetic feet were between 0.63 and 0.81, whereas the EFLR estimated for the physiologic system was 0.83.
机译：本技术说明的目的是介绍有效脚长比（EFLR），作为评估假脚的一种可能的测量工具。 EFLR乘以100可得到在步行步骤中有效使用的脚部百分比，并且可能对步长和对侧的肢体负荷产生临床影响。在保持代表使用者体重的恒定力水平的同时，将假肢脚在力平台上手动滚动。通过在以脚为基础的坐标系中的负载角处找到从每个假脚的脚跟到压力中心的距离来测量有效脚长，该负载角表示在步行过程中相对的脚跟接触时的近似柄角。然后将有效脚长通过总脚长归一化以确定EFLR。介绍了1990年代在临床上使用的15个假脚的EFLR，以及对生理性脚踝系统的EFLR的估算。所有假足的EFLR均低于相应的生理系统，尽管有些比率接近生理系统。假足的EFLR在0.63和0.81之间，而生理系统的EFLR估计为0.83。

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