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首页> 外文期刊>Journal of prosthetics and orthotics: JPO >Development and Preliminary Testing of a Device for the Direct Measurement of Forces and Moments in the Prosthetic Limb of Transfemoral Amputees during Activities of Daily Living
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Development and Preliminary Testing of a Device for the Direct Measurement of Forces and Moments in the Prosthetic Limb of Transfemoral Amputees during Activities of Daily Living

机译：在日常生活活动中直接测量经股截肢假肢肢中力量和力矩的装置的开发和初步测试

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Purpose: To provide a comprehensive description of the direct measurement of forces and moments applied on the socket of transfemoral amputees during daily living activities. Methods: The forces and moments applied on the socket of one female transfemoral amputee were measured with a commercial transducer at a sampling frequency of 200 Hz and recorded at distance using a wireless modem to transmit the data. The subject was asked to walk in a straight line and around a circle as well as to ascend and descend a slope and stairs. The subject was instructed to perform each activity at her natural pace and as she would usually perform it during daily life. Results: The results were based on a high number of gait cycles of the prosthetic leg for each activity. For instance, 62 gait cycles were measured during level walking in a straight line. Ascending a slope produced a larger moment around the mediolateral axis than walking over the entire support phase. In addition, walking around a circle produced a higher moment about the long axis of the socket than walking during the push-off phase of the support. The mean stride frequency while descending a slope was higher than straight level walking. All the other activities presented a slower mean stride frequency than straight level walking. The impulse on the three axes was similar or smaller than walking in a straight line for all of the activities except for walking around a circle on the mediolateral axis, as well as ascending a slope and stairs and walking around a circle on the long axis. Conclusion: An apparatus to directly measure the actual forces and moments applied to the socket of the transfemoral amputees during an unlimited number of steps and a wide range of activities is presented. The apparatus presented here could be used by multidisciplinary teams, including engineers, prosthetists, and physiotherapists, facing the challenge of safely restoring the locomotion of transfemoral amputees fitted with a conventional socket or, in particular, an osseointegrated implant.
机译：目的：全面描述在日常生活活动中直接测量经股截肢者插座上施加的力和力矩。方法：使用商用换能器以200 Hz的采样频率测量施加在一只女性经股截肢者插座上的力和力矩，并使用无线调制解调器远距离记录以传输数据。受试者被要求沿着一条直线行走并绕一圈，以及上升和下降斜坡和楼梯。指示受试者以她自然的步调进行各项活动，就像她通常在日常生活中进行的那样。结果：该结果是基于每种活动的假肢的大量步态周期。例如，在直线水平行走期间测量了62个步态周期。与在整个支撑阶段中行走相比，上升斜坡绕中外侧轴产生的力矩更大。另外，与在支撑件的下推阶段中行走相比，绕圈行走绕插座的长轴产生了更高的力矩。下降斜坡时的平均步幅频率高于直线行走。所有其他活动的平均步幅均比平直步行慢。在所有活动中，三个轴上的推动力近似于或小于直线走，除了在中外侧轴上绕一圈走，上坡和爬楼梯以及在长轴上绕一圈走。结论：提出了一种设备，该设备可在无数个步骤和广泛的活动过程中直接测量施加到经股截肢者插口上的实际力和力矩。此处介绍的仪器可由包括工程师，修复专家和物理治疗师在内的多学科团队使用，面临着安全地恢复装有常规插口或特别是骨整合植入物的经股截肢者的运动的挑战。

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