Functional electrical stimulation using microstimulators to correct foot drop: a case study.
Functional electrical stimulation using microstimulators to correct foot drop: a case study.
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使用微刺激器进行功能性电刺激来纠正足下垂：案例研究。
DOI：
10.1139/y04-078
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发表时间：
2004
期刊：
影响因子：
--
通讯作者：
Misiaszek,J
中科院分区：
文献类型：
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作者：
Weber,DJ;Stein,RB;Chan,KM;Loeb,GE;Richmond,FJR;Rolf,R;James,K;Chong,SL;Thompson,AikoKido;Misiaszek,J
本文介绍了一项案例研究，测试了在功能性电刺激（FES）设备中使用可注射微刺激器（BIONs®）来纠正足下垂的可行性和有效性。与腓总神经的表面刺激相比，用BION的刺激提供了对特定肌肉的更有选择性的激活。例如，用BION刺激胫骨前肌（TA）和趾长伸肌（EDL）肌肉产生踝关节屈曲，而没有足部的过度内翻或外翻（即，平衡屈曲）。疗效评估采用 3-在有和没有刺激的情况下行走期间踝关节和足部轨迹的三维运动分析。在没有刺激的情况下，受影响的腿上的脚趾拖过地面。BION刺激TA肌肉和腓深神经（支配TA和EDL）可抬高足部，使脚趾离开地面3 cm，这相当于受影响较小的腿部的脚趾间隙。生理成本指数（PCI）测量步行过程中的努力。PCI等于心率的变化（从休息到活动）除以步行速度;单位是每米心跳。无刺激时PCI较高（2.29 ± 0.37，平均值± SD），表面刺激（1.29 ± 0.10）和BIONic刺激（1.46 ± 0.24）时PCI大幅降低。此外，步行速度从无刺激的9.4 ± 0.4 m/min增加到表面刺激的19.6 ± 2.0 m/min和BIONic刺激的17.8 ± 0.7 m/min。这些结果表明，由BION提供的FES是一种替代表面刺激，并提供选择性控制肌肉activation. Keywords：FES，BION，足下垂，中风，脊髓损伤。
This paper presents a case study that tested the feasibility and efficacy of using injectable microstimulators (BIONs®) in a functional electrical stimulation (FES) device to correct foot drop. Compared with surface stimulation of the common peroneal nerve, stimulation with BIONs provides more selective activation of specific muscles. For example, stimulation of the tibialis anterior (TA) and extensor digitorum longus (EDL) muscles with BIONs produces ankle flexion without excessive inversion or eversion of the foot (i.e., balanced flexion). Efficacy was assessed using a 3-dimensional motion analysis of the ankle and foot trajectories during walking with and without stimulation. Without stimulation, the toe on the affected leg drags across the ground. BION stimulation of the TA muscle and deep peroneal nerve (which innervates TA and EDL) elevates the foot such that the toe clears the ground by 3 cm, which is equivalent to the toe clearance in the less affected leg. The physiological cost index (PCI) measured effort during walking. The PCI equals the change in heart rate (from rest to activity) divided by the walking speed; units are beats per metre. The PCI is high without stimulation (2.29 ± 0.37, mean ± SD) and greatly reduced with surface (1.29 ± 0.10) and BIONic stimulation (1.46 ± 0.24). Also, walking speed increased from 9.4 ± 0.4 m/min without stimulation to 19.6 ± 2.0 m/min with surface and 17.8 ± 0.7 m/min with BIONic stimulation. These results suggest that FES delivered by a BION is an alternative to surface stimulation and provides selective control of muscle activation.Key words:FES, BION, foot drop, stroke, spinal cord injury.