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首页> 外文学位 >The Effect of Prosthetic Foot Component Stiffness on Initiation and Termination of Transtibial Amputee Gait.
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The Effect of Prosthetic Foot Component Stiffness on Initiation and Termination of Transtibial Amputee Gait.

机译：假肢足部刚度对胫骨截肢步态起始和终止的影响。

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摘要

Lower limb loss is an increasingly common clinical problem in our society. Along with the loss of limb, amputees must also learn to use their new prosthetic device for their daily activities. The ideal stiffness characteristics of prosthetic feet for different functional activities may vary depending on each activity. Therefore the prescribed foot must be a compromise of multiple ideals out of functional necessity. Quantification of gait and stability characteristics is necessary to provide vital information into the design and prescription of future prosthetics to align with prosthetic users' needs and activity profiles.;The purpose of this study was to determine the effects of varying component stiffness of the prosthetic foot on locomotion and stability measures during gait initiation and termination. It was hypothesized that the leading sound condition would display greater excursions than the leading prosthetic condition for both mediolateral and anteroposterior excursions of the center of mass and center of pressure. It was also hypothesized that there would be differences between compliant and stiff heel components in each excursion measure.;Six male unilateral transtibial amputees participated in this study (41 +/- 13.7 years, 1.82 +/- 0.06 m, and 85.8 +/- 15.5 kg). Subjects completed gait initiation and termination trials while force plates recorded ground reaction forces and motion capture was used to measure body kinematics. Center of mass (COM) and center of pressure (COP) measures were derived from the data gathered. The originally captured data were filtered to obtain a clear signal to noise ratio. Specific gait events from the analysis provided consistent intervals to measure center of mass and center of pressure excursions in the two gait activities studied.;Results indicated that leading with the sound limb during initiation and termination increased the COM excursion in the anteroposterior direction. A lack of significant results in the COP and all M/L directions between leading foot conditions indicates there are multiple strategies to achieve initiation and termination. A reliance on the sound limb agrees with previous studies, and appears to be functionally necessary to transtibial amputee gait. However, prosthetic foot stiffness levels have varied effects and should be taken into account for the design and prescription of future prosthetic feet.
机译：下肢丢失是我们社会越来越普遍的临床问题。除了失去肢体，截肢者还必须学会在日常活动中使用新的假肢设备。对于不同的功能活动，假脚的理想刚度特性可能会因每种活动而异。因此，规定的脚必须出于功能上的需要而折衷多个理想。步态和稳定性特征的量化对于为将来的假肢的设计和处方提供重要信息以与假肢使用者的需求和活动状况保持一致是必不可少的;这项研究的目的是确定假肢足部不同刚度的影响步态启动和终止过程中的运动和稳定性措施。假设对于质心和压力中心的中外侧和前后偏移，领先的声音状况将显示出比领先的假肢状况更大的偏移。还假设每种偏移测量中顺应性和后跟僵硬度组件之间会有差异。；六位男性单侧经胫截肢者参加了这项研究（41 +/- 13.7岁，1.82 +/- 0.06 m和85.8 +/- 15.5公斤）。受试者完成了步态的起始和终止试验，而测力板记录了地面反作用力，运动捕捉用于测量人体运动学。重心（COM）和压力中心（COP）措施是从收集的数据中得出的。对原始捕获的数据进行滤波以获得清晰的信噪比。分析中的特定步态事件在所研究的两个步态活动中提供了一致的时间间隔来测量质心和压力偏移中心。;结果表明，在开始和终止期间以健全肢体为前导增加了前后方向的COM偏移。在COP以及前足情况之间的所有M / L方向上均未见明显结果，这表明有多种策略可以实现启动和终止。对声音肢体的依赖与以前的研究一致，并且似乎在功能上对于经胫截肢者的步态是必要的。但是，假脚的刚度水平会产生不同的影响，在以后假脚的设计和处方中应考虑这些因素。

著录项

  • 作者

    Peterson, Travis J.;

  • 作者单位

    University of Washington.;

  • 授予单位 University of Washington.;
  • 学科 Biophysics Biomechanics.;Engineering Mechanical.
  • 学位 M.S.M.E.
  • 年度 2012
  • 页码 95 p.
  • 总页数 95
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

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