The development of a knee locker with closed-loop functional electrical stimulation (FES) for hemiplegia in gait training

被引:11
作者
Chen, YL
Chang, WH
Chen, SC
Sheu, PF
Chen, WL
机构
[1] Hwa Hsia Coll Technol & Commerce, Dept Elect Engn, Taipei 235, Taiwan
[2] Chung Yuan Christian Univ, Dept Biomed Engn, Chungli, Taiwan
[3] Taipei Med Univ & Hosp, Dept Phys Med & Rehabil, Taipei, Taiwan
关键词
D O I
10.1080/0963828031000122230
中图分类号
R49 [康复医学];
学科分类号
100215 ;
摘要
Purpose: A knee locker with closed-loop functional electrical stimulation (FES) system has beendeveloped to prevent the quadriceps weakness and the drop-foot of the hemiplegia during gait training. Method: The FES system is triggered by a footswitch on the heel of the disabled foot to stimulate the tibialis anterior muscle for dorsi-flexion and to turn-off the knee locker in the swing phase through the main controller. Besides, the footswitch on the heel of the affected-side can be used to stimulate the quadriceps and to turn-on the knee locker for quadriceps weakness in the stance phase. Results: It is revealed that the mean velocity, cadence, stride length, active ankle motion range, and functional ambulation category (FAC) have improved significantly from 0.15 +/- 0.04 m sec(-1), 43.3 +/- 15.4 steps min(-1), 0.36 +/- 0.11 m, 15degrees, level 2 to 0.43 +/- 0.21 m sec(-1), 69.4 +/- 19.1 steps min(-1), 0.73 +/- 0.17 m, 40degrees, level 4 respectively for the patient. A paired t-test indicated that differences in the electromyography (EMG) of the tibialis anterior and the quadriceps muscles between patient's disabled (affected-side) foot and normal (unaffected-side) foot are not significant (p > 0.05) after 16 weeks of training. Conclusions: It is concluded that this new knee locker with closed-loop FES system is capable of providing the hemiplegia with restoration to regular walking after appropriate gait training.
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页码:916 / 921
页数:6
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