Influence of Prosthetic Sagittal Alignment on Trans-Tibial Amputee Gait and Compensating Pattern:A Case Study |
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Authors: | JIA Xiaohong WANG Rencheng ZHANG Ming LI Xiaobing |
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Institution: | [1]Division of Intelligent and Biomechanical System, State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China; [2]Department of Health Technology and Informatics, The Hong Kong Polytechnic University, Hong Kong, China |
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Abstract: | This study relates the gait asymmetry,residual limb comfort,and energy cost dunng walking and identifies a compensating pattem 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 sagittalal ignment 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 dudng 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 pattems,more cases will be studied in future work. |
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Keywords: | prosthetic alignment knee joint moment interface pressure phase symmetry index trans-tibial amputee |
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