Load along the femur shaft during activities of daily living
Load along the femur shaft during activities of daily living
复制标题
DOI：
10.1016/j.jbiomech.2013.06.012
复制
发表时间：
2013-08-01
影响因子：
2.4
通讯作者：
Leardini, A.
中科院分区：
文献类型：
--
作者：
D'Angeli, V.;Belvedere, C.;Leardini, A.
在日常生活活动中对股骨干施加的载荷的全面了解对于设计相关假体的直接附着体是必要的，使用运动分析系统和具有皮肤标记的既定协议来估计作用在沿整个股骨干沿着等距的10个点上的力和力矩的三个分量。20名健康的年轻志愿者进行了分析，同时执行三个重复的以下任务：水平步行在三个不同的速度，直线和突然改变方向的权利和向左，楼梯上升和下降，蹲下，从椅子上站起来，坐下来。平均负荷模式，体重和身高标准化后，计算超过受试者的每个点，约三个解剖轴，并为每个motor task.These模式被发现一致的科目，但不同的解剖轴和任务。一般而言，观察到的力矩受进展速度的影响有限，并且对于更近端的点更高。在下楼梯时，腹部/内收的力矩也更高（平均为体重 * 身高的8.1%），几乎是屈曲/伸展力矩（2.6）的三倍。在所有力矩中，最大值为164.8 N m，高速水平行走时的abd/内收。目前的结果应该是有价值的，也为最合适的水平，在经股截肢，在体外力学测试和有限元模型的股骨截肢。(c)2013爱思唯尔有限公司保留所有权利。
A comprehensive knowledge of the loads applied during activities of daily living to the femur shaft is necessary to the design of direct attachments of relevant prostheses.A motion analysis system was used together with an established protocol with skin markers to estimate the three components of the forces and moments acting on ten equidistant points along the full femur shaft. Twenty healthy young volunteers were analyzed while performing three repetitions of the following tasks: level walking at three different speeds, straight-line and with sudden changes of direction to the right and to the left, stairs ascending and descending, squat, rising from a chair and sitting down. Average load patterns, after normalisation for body weight and height, were calculated over subjects for each point, about the three anatomical axes, and for each motor task.These patterns were found consistent over subjects, but different among the anatomical axes and tasks. In general, the moments were observed limitedly influenced by the progression speed, and higher for more proximal points. The moments were also higher in abd/adduction (8.1% body weight*height on average), nearly three times larger than those in flex/extension (2.6) during stair descending. The largest value over all moments was 164.8 N m, abd/adduction in level walking at high speed. The present results should be of value also for a most suitable level for amputation in transfemoral amputation, for in-vitro mechanical tests and for finite element models of the femur. (c) 2013 Elsevier Ltd. All rights reserved.