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Computer-controlled portable stimulator for paraplegic patients

J Minzly1, J Mizrahi, E Isakov

  • 1Loewenstein Rehabilitation Center, Raanana, Israel.

Journal of Biomedical Engineering
|July 1, 1993
PubMed
Summary
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This study presents a portable, computer-controlled stimulator for paraplegic functional electrical stimulation (FES). The device allows programmable parameter adjustments for enhanced patient training and mobility.

Area of Science:

  • Biomedical Engineering
  • Rehabilitation Technology
  • Neuroprosthetics

Background:

  • Paraplegia presents significant mobility challenges.
  • Functional Electrical Stimulation (FES) offers a potential solution for restoring movement.
  • Existing FES systems often lack portability and advanced control features.

Purpose of the Study:

  • To develop and describe a novel six-channel, lightweight, and portable stimulator for FES in paraplegic patients.
  • To enable advanced programming and control for tailored rehabilitation programs.
  • To evaluate the stimulator's efficacy in improving functional activation.

Main Methods:

  • Design of a computer-controlled stimulator with both local and remote-control modes (IBM PC compatible).
  • Individual programmability of stimulus parameters (current intensity, frequency, pulse width) per channel.

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  • Utilized rechargeable nickel-cadmium batteries (12V 500mAh) for portable power.
  • Developed various training programs for sitting, standing, and walking positions.

    • Main Results:

    • The stimulator is lightweight, portable, and computer-controlled.
    • Stimulus parameters are individually adjustable and programmable for each of the six channels.
    • Demonstrated a run time of 1.5 hours with a 200 mA load on four channels.
    • Training programs were developed and tested on 25 paraplegic patients.

    Conclusions:

    • The developed stimulator facilitates functional activation and training for paraplegic patients.
    • The system's portability and programmable features enhance rehabilitation flexibility.
    • Ongoing clinical, biomechanical, and physiological studies aim to optimize patient performance and stimulation protocols.