Influence of Prosthetic Sagittal Alignment on Trans-Tibial Amputee Gait and Compensating Pattern:A Case Study  

作　　者：贾晓红 王人成 张明 李小兵 

机构地区：[1]Division of Intelligent and Biomechanical System,State Key Laboratory of Tribology,Tsinghua University [2]Department of Health Technology and Informatics,The Hong Kong Polytechnic University

出　　处：《Tsinghua Science and Technology》2008年第5期581-586,共6页清华大学学报（自然科学版（英文版）

基　　金：the National Natural Science Foundation of China (No. 50305013)

摘　　要：This study relates the gait asymmetry, residual limb comfort, and energy cost during walking and identifies a compensating pattern for the trans-tibial amputees when the prostheses are misaligned. One male subject with a trans-tibial amputation volunteered for the study. The knee joint moments at the prosthetic side, the phase symmetry index, and the interface pressures were discussed under three sagittal alignment settings. The results show that the subject changes the knee joint moment, gait symmetry, and interface pressure with a misaligned prosthesis to improve his comfort and movement during walking. A high-quality liner reduces the gait sensitivity to misalignment and enhances the amputee＇s ability to compensate for misalignment. Since different people have different compensation patterns, more cases will be studied in future work.This study relates the gait asymmetry, residual limb comfort, and energy cost during walking and identifies a compensating pattern for the trans-tibial amputees when the prostheses are misaligned. One male subject with a trans-tibial amputation volunteered for the study. The knee joint moments at the prosthetic side, the phase symmetry index, and the interface pressures were discussed under three sagittal alignment settings. The results show that the subject changes the knee joint moment, gait symmetry, and interface pressure with a misaligned prosthesis to improve his comfort and movement during walking. A high-quality liner reduces the gait sensitivity to misalignment and enhances the amputee＇s ability to compensate for misalignment. Since different people have different compensation patterns, more cases will be studied in future work.

关 键 词：prosthetic alignment knee joint moment interface pressure phase symmetry index transtibia amputee 

分 类 号：R687.3[医药卫生—骨科学]