4.6 Article

A Generic Sequential Stimulation Adapter for Reducing Muscle Fatigue during Functional Electrical Stimulation

期刊

SENSORS
卷 21, 期 21, 页码 -

出版社

MDPI
DOI: 10.3390/s21217248

关键词

sequential stimulation; functional electrical stimulation; rehabilitation; fatigue reduction

资金

  1. Canadian Institutes of Health Research [PJT-148851]

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The study found that sequential stimulation (SEQ) can effectively reduce neuromuscular fatigue, but its adoption in research and clinical settings is limited. By using the SEQ adapter, signal integrity can be preserved, effectively increasing the utilization of SEQ in existing rehabilitation paradigms.
Background: Clinical applications of conventional functional electrical stimulation (FES) administered via a single electrode are limited by rapid onset neuromuscular fatigue. Sequential (SEQ) stimulation, involving the rotation of pulses between multiple active electrodes, has been shown to reduce fatigue compared to conventional FES. However, there has been limited adoption of SEQ in research and clinical settings. Methods: The SEQ adapter is a small, battery-powered device that transforms the output of any commercially available electrical stimulator into SEQ stimulation. We examined the output of the adaptor across a range of clinically relevant stimulation pulse parameters to verify the signal integrity preservation ability of the SEQ adapter. Pulse frequency, amplitude, and duration were varied across discrete states between 4 and 200 Hz, 10 and100 mA, and 50 and 2000 mu s, respectively. Results: A total of 420 trials were conducted, with 80 stimulation pulses per trial. The SEQ adapter demonstrated excellent preservation of signal integrity, matching the pulse characteristics of the originating stimulator within 1% error. The SEQ adapter operates as expected at pulse frequencies up to 160 Hz, failing at a frequency of 200 Hz. Conclusion: The SEQ adapter represents an effective and low-cost solution to increase the utilization of SEQ in existing rehabilitation paradigms.

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