Powers C M, Torburn L, Perry J, Ayyappa E
Rancho Los Amigos Medical Center, Pathokinesiology Laboratory, Downey, CA 90242.
Arch Phys Med Rehabil. 1994 Jul;75(7):825-9.
Altered gait patterns resulting from amputation has been implicated as a possible mechanism for early degenerative changes in the sound limb of unilateral amputees. The purpose of this study was to examine the ground reaction force characteristics and joint motion in this population. Ground reaction forces, joint motion, and stride characteristics of 10 traumatic below-knee amputees were analyzed while wearing five different prosthetic feet (SACH, Flex-foot, Carbon Copy II, Seattle, and Quantum). Subjects used each foot for 1 month prior to testing. Results indicated that the Flex-foot significantly reduced the initial peak of the vertical ground reaction force on the sound limb compared to all other feet tested (p < .0001). The SACH foot consistently produced the greatest ground reaction forces on the sound limb; however, this was not statistically significant. The effective factor of the Flex-foot appears to be minimization of the center of gravity elevation, which was accomplished through a significant increase in terminal stance dorsiflexion compared to the other feet tested (p < .0001).
截肢导致的步态模式改变被认为是单侧截肢者健全肢体早期退行性变化的一种可能机制。本研究的目的是检查该人群的地面反作用力特征和关节运动。分析了10名创伤性膝下截肢者在穿戴五种不同假肢脚（SACH、Flex-foot、Carbon Copy II、西雅图和量子）时的地面反作用力、关节运动和步幅特征。受试者在测试前使用每只脚1个月。结果表明，与所有其他测试的脚相比，Flex-foot显著降低了健全肢体上垂直地面反作用力的初始峰值（p < .0001）。SACH脚在健全肢体上始终产生最大的地面反作用力；然而，这在统计学上并不显著。Flex-foot的有效因素似乎是将重心升高最小化，这是通过与其他测试的脚相比终末支撑背屈显著增加来实现的（p < .0001）。
