BIOMECHANICAL ANALYSIS OF THE INFLUENCE OF PROSTHETIC FEET ON BELOW-KNEE AMPUTEE WALKING
BIOMECHANICAL ANALYSIS OF THE INFLUENCE OF PROSTHETIC FEET ON BELOW-KNEE AMPUTEE WALKING
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DOI：
10.1097/00002060-199106000-00006
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发表时间：
1991-06-01
影响因子：
3
通讯作者：
DEGROOT, DM
中科院分区：
文献类型：
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作者：
GITTER, A;CZERNIECKI, JM;DEGROOT, DM
虽然储能假足已经获得了广泛的临床认可，但这些部件对膝下截肢者步态的生物力学影响却知之甚少。 本研究的目的是确定生物力学的适应下膝截肢者，而穿着传统的假肢脚，并评估这些适应的能量存储假肢脚的影响。 研究了5名正常人和5名膝下截肢者使用SACH、西雅图和Flex足时下肢的机械功率输出。 以1.5 m/s的步行速度收集地面反作用力和运动学数据，并用于确定站立期间下肢的肌肉功率输出。 在残肢的髋关节和膝关节处出现一致的肌肉功率输出模式。 当佩戴SACH足时，在推出期间在假足处发生可忽略的能量产生。 近端肌群的主要适应是在站立前半段膝关节能量吸收的减少和髋关节伸肌能量产生的增加。 与SACH足部相比，能量储存足部在推离期间表现出增加的能量产生。 尽管储能假足的性能有所改善，但与SACH足相比，在膝关节和髋关节动力输出的模式或幅度方面没有发现显著差异。
Although energy storing prosthetic feet have achieved widespread clinical acceptance, the effect of these components on the biomechanics of below-knee amputee gait is poorly understood. The purpose of this study was to determine the biomechanical adaptations used by the below-knee amputee while wearing a conventional prosthetic foot and to assess the influence of energy storing prosthetic feet on these adaptations. Mechanical power outputs of the lower extremity in five normal and five below-knee amputee subjects using the SACH, Seattle and Flex feet were studied. Ground reaction forces and kinematic data were collected at a walking speed of 1.5 m/s and were used to determine the muscular power outputs of the lower extremity during stance. Consistent patterns of muscular power output at the hip and knee of the residual limb occur. While wearing the SACH foot, negligible energy generation occurs at the prosthetic foot during pushoff. A decrease in energy absorption at the knee during the first half of stance and an increase in energy generation by the hip extensors were the major adaptations noted in the proximal muscle groups. Compared to the SACH foot, the energy storing feet demonstrated increased energy generation during pushoff. Despite the improvements in the performance of the energy storing prosthetic feet, no significant differences were found in the pattern or magnitude of knee and hip power outputs compared to the SACH foot.