A portable powered ankle-foot orthosis for rehabilitation
A portable powered ankle-foot orthosis for rehabilitation
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DOI：
10.1682/jrrd.2010.04.0054
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发表时间：
2011-01-01
影响因子：
--
通讯作者：
Hsiao-Wecksler, Elizabeth T.
中科院分区：
文献类型：
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作者：
Shorter, K. Alex;Kogler, Geza F.;Hsiao-Wecksler, Elizabeth T.
矫形学领域的创新技术进步，如便携式动力矫形器系统，可以创造新的治疗方式，以改善康复的功能结果。在这篇文章中，我们提出了一种新型的便携式动力踝足矫形器(PPAFO)，以提供步态中的自由辅助。PPAFO通过双向气动旋转致动器提供足底屈肌和背屈肌力矩辅助。该系统使用便携式气动电源(压缩二氧化碳瓶)和嵌入式电子设备来控制脚部的驱动。我们收集了一名残障受试者和三名非残障受试者的先导性实验数据，以演示设计功能。受损者因马尾神经综合征导致双侧小腿受损。我们发现，来自非残疾步行者的数据证明了PPAFO在步态中提供正确计时的足底屈肌和背屈肌辅助的能力。在辅助非残疾步行试验中，站立和摆动时胫骨前肌的激活也减少。在受试者的辅助试验中，在站立的后半段，垂直地面反作用力增加。来自非残障步行者的数据显示了功能，而来自受损步行者的数据显示了提供功能性足底屈肌辅助的能力。
Innovative technological advancements in the field of orthotics, such as portable powered orthotic systems, could create new treatment modalities to improve the functional outcome of rehabilitation. In this article, we present a novel portable powered ankle-foot orthosis (PPAFO) to provide untethered assistance during gait. The PPAFO provides both plantar flexor and dorsiflexor torque assistance by way of a bidirectional pneumatic rotary actuator. The system uses a portable pneumatic power source (compressed carbon dioxide bottle) and embedded electronics to control the actuation of the foot. We collected pilot experimental data from one impaired and three nondisabled subjects to demonstrate design functionality. The impaired subject had bilateral impairment of the lower legs due to cauda equina syndrome. We found that data from nondisabled walkers demonstrated the PPAFO's capability to provide correctly timed plantar flexor and dorsiflexor assistance during gait. Reduced activation of the tibialis anterior during stance and swing was also seen during assisted nondisabled walking trials. An increase in the vertical ground reaction force during the second half of stance was present during assisted trials for the impaired subject. Data from nondisabled walkers demonstrated functionality, and data from an impaired walker demonstrated the ability to provide functional plantar flexor assistance.