Optimal Load Bearing Characteristics of the Patellar Tendon in Below-Knee Amputees

这项研究的目的是监测膝下截肢假体通过髌腱(PT)传递到截肢者残端的力；评估关节窝和残肢之间不受欢迎的自由度；通过增加支撑它的插座部分来改变PT在承重过程中的份额；确定可以施加于它的力的限度；并在考虑普遍因素和个体变量的情况下，建议对髌腱承托槽进行修改，以产生最佳的力分布。将开发一种特殊的双轴力传感器来测量运动过程中作用在PT上的两个力分量。线性位移计将监测短节插座的轴向和垂直自由度。将选出15名截肢者参加实验室测试。每个截肢者都将安装一个实验性假肢，并将参加三个实验阶段。在测试期间，将对插座进行系统的更改，并观察记录的变量(在移动过程中)的影响。

The purpose of the study is to monitor forces which are transmitted by a prosthesis for below-knee amputations to the stump of the amputee, through the patellar tendon (PT); to evaluate undesirable freedom between the socket and the stump; to alter the share of the PT in the weight-bearing process by augmenting the portion of the socket which supports it; to determine the limits of force that can be applied to it; and to suggest modifications to the Patellar-Tendon-Bearing socket which will produce optimal force distribution, taking into account universal considerations and individual variables. A special biaxial force transducer will be developed to measure two force components acting on the PT during locomotion. Linear displacement gauges will monitor axial and perpendicular freedom of the stump-socket. Fifteen amputees will be selected to participate in laboratorial testing. Each amputee will be fitted with an experimental prosthesis and will take part in three experimental sessions. During the tests, systematic changes to the socket will be administered and the influence of the recorded variables (during locomotion) will be observed.