Gait and balance of transfemoral amputees using passive mechanical and microprocessor-controlled prosthetic knees
Gait and balance of transfemoral amputees using passive mechanical and microprocessor-controlled prosthetic knees
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DOI：
10.1016/j.gaitpost.2007.07.011
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发表时间：
2007-10-01
期刊：
影响因子：
2.4
通讯作者：
Joyner, M. J.
中科院分区：
文献类型：
--
作者：
Kaufman, K. R.;Levine, J. A.;Joyner, M. J.
背景：微处理器控制的膝关节在十年前出现在市场上。这些接头比机械接头更复杂，也更昂贵。文献中关于使用这些复杂器械时步态和平衡的变化存在矛盾。研究方法：本研究采用交叉设计，在15名膝上截肢受试者中评估被动机械膝关节假体与微处理器控制膝关节的比较性能。获得步态和平衡的客观测量值。结果如下：受试者在接受微处理器控制的人工膝关节后表现出显著改善的步态特征（p < 0.01）。步态改善是在负荷反应期间从膝关节过伸过渡到膝关节屈曲，导致膝关节内屈肌力矩变为膝关节伸肌力矩。参与者的平衡也有所改善（p < 0.01）。感觉组织测试（SOT）的所有条件都表现出平衡评分的改善。综合评分也有所增加。结论：使用微处理器控制膝关节的经股截肢者在步态和平衡方面有显著改善。(c)2007 Elsevier B.V.保留所有权利。
Background: Microprocessor-control led knee joints appeared on the market a decade ago. These joints are more sophisticated and more expensive than mechanical ones. The literature is contradictory regarding changes in gait and balance when using these sophisticated devices. Methods: This study employed a crossover design to assess the comparative performance of a passive mechanical knee prosthesis compared to a microprocessor-controlled kneejoint in 15 subjects with an above-knee amputation. Objective measurements of gait and balance were obtained. Results: Subjects demonstrated significantly improved gait characteristics after receiving the microprocessor-controlled prosthetic knee joint (p < 0.01). Improvements in gait were a transition from a hyperextended knee to a flexed knee during loading response which resulted in a change from an internal knee flexor moment to a knee extensor moment. The participants' balance also improved (p < 0.01). All conditions of the Sensory Organization Test (SOT) demonstrated improvements in equilibrium score. The composite score also increased. Conclusions: Transfemoral amputees using a microprocessor-controlled knee have significant improvements in gait and balance. (c) 2007 Elsevier B.V. All rights reserved.