Preliminary evaluation of a controlled-brake orthosis for FES-aided gait
Preliminary evaluation of a controlled-brake orthosis for FES-aided gait
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DOI：
10.1109/tnsre.2003.816873
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发表时间：
2003-09-01
影响因子：
4.9
通讯作者：
Durfee, W
中科院分区：
文献类型：
--
作者：
Goldfarb, M;Korkowski, K;Durfee, W
一种结合计算机控制矫形器系统的混合功能电刺激（FES）步态系统已经被开发出来，以解决快速肌肉疲劳和运动控制差的问题，这是FES辅助步态的特征。矫形器是一个长腿支架，在髋关节和膝关节处包含可控摩擦制动器。该系统利用受刺激的肌肉作为不调节动力的来源，并通过计算机控制摩擦制动器调节每个关节的动力，从而实现理想的肢体轨迹。肌肉疲劳是通过锁定可控的刹车，以提供必要的等距关节扭矩在立场减少。以四名截瘫患者为研究对象，对混合步态系统进行了评估，并与传统的四通道fes辅助步态进行了比较。结果显示，与单独使用FES相比，使用矫形器联合FES可显著减少肌肉疲劳，改善轨迹控制。不同受试者对距离和速度的改善结果不尽相同。在该系统能够在实验室外使用之前，硬件设计方面还有大量工作要做。
A hybrid functional-electrical stimulation (FES) gait system that incorporates a computer-controlled orthosis system has been developed to address the problems of rapid muscle fatigue and poor movement control that are characteristic of FES-aided gait. The orthosis is a long-leg brace that contains controllable friction brakes at both hip and knee joints. The system achieves desirable limb trajectories by utilizing the stimulated muscles as a source of unregulated power and regulating the power at each joint by computer control of the friction brakes. Muscle fatigue is reduced by locking the controllable brakes to provide the isometric joint torques necessary during stance. The hybrid gait system was evaluated and compared to conventional four channel FES-aided gait using four subjects with paraplegia. The results demonstrated significant reduction in muscle fatigue and improvement in trajectory control when using the orthosis combined with FES compared to using FES alone. Results for distance and speed improvements varied across subjects. Considerable work remains in the design of the hardware before the system is feasible for use outside the laboratory.