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首页> 外文期刊>Journal of engineering and applied science >A TENS BASED WEARABLE FUNCTIONAL ELECTRICAL STIMULATION DEVICE FOR HEMIPARETIC PATIENTS
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A TENS BASED WEARABLE FUNCTIONAL ELECTRICAL STIMULATION DEVICE FOR HEMIPARETIC PATIENTS

机译：一种基于Tens的可穿戴式功能性电刺激装置

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Hemiparesis is associated with an impaired gait due muscle weakness and the inability of the patient to control the affected lower limb. To address this problem, this study aimed at designing, implementing and testing a smart wearable orthotic device that incorporated a mixed frequency pulse train to stimulate knee flexor and/or ankle dorsiflexor muscles in these patients at the appropriate times during the gait cycle. Accelerometer sensor were placed on the shank to continuously monitor lower limb joint angles. As skeletal muscles are non-linear and time-varying physiological and biomechanical systems, feedback control was achieved using Proportional Integral Derivative "PID" controller based on the timing determined by the joint angles. Initial results from three patients showed an improvement in knee flexion angle during walking that ranged between 86 to 193% of original values without the use of the device indicating a more normal gait pattern.
机译：偏瘫与由于肌肉无力导致的步态受损以及患者无法控制受影响的下肢有关。为了解决这个问题，本研究旨在设计，实施和测试一种智能可穿戴矫形器，该设备结合了混合频率脉冲序列，可以在步态周期的适当时间刺激这些患者的膝屈肌和/或踝背屈肌。将加速度传感器放在小腿上，以连续监测下肢关节的角度。由于骨骼肌是非线性的且随时间变化的生理和生物力学系统，因此基于关节角度确定的时间，使用比例积分微分“ PID”控制器实现了反馈控制。来自三名患者的初步结果显示，步行过程中膝关节屈曲角度的改善介于原始值的86％至193％之间，而未使用该装置表明步态更为正常。

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