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Related Experiment Videos

New easy to install nerve cuff electrode using shape memory alloy armature.

M A Crampon1, M Sawan, V Brailovski

  • 1Department of Electrical and Computer Engineering, Ecole Polytechnique de Montréal, Quebec, Canada.

Artificial Organs
|June 23, 1999
PubMed
Summary

A novel nerve cuff electrode utilizes shape memory alloy for easier, safer implantation in functional electrical stimulation (FES). This innovation simplifies FES device application for spinal cord injury patients.

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Area of Science:

  • Biomedical Engineering
  • Neuroprosthetics
  • Materials Science

Background:

  • Functional electrical stimulation (FES) requires reliable nerve electrodes for therapeutic applications.
  • Current nerve cuff electrode implantation can be complex and time-consuming.
  • Spinal cord injury (SCI) patients often require advanced neuroprosthetic solutions.

Purpose of the Study:

  • To present an easily implantable nerve cuff electrode for FES.
  • To introduce the use of shape memory alloy (SMA) for electrode closure.
  • To facilitate FES applications in SCI patients, specifically for bladder function.

Main Methods:

  • Developed a novel nerve cuff electrode design incorporating a SMA armature.
  • Fabricated bipolar and tripolar electrodes with specific dimensions (1.6 mm inner diameter, 0.8 mm cuff thickness).

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  • Utilized SMA's shape memory effect and superelasticity for secure electrode closing.

    • Main Results:

    • The SMA armature enables easier, quicker, and safer electrode installation around nerves.
    • The fabrication process is straightforward and does not require expensive equipment.
    • Manufactured electrodes are suitable for FES applications, including bladder control.

    Conclusions:

    • The novel SMA-based nerve cuff electrode offers a simplified implantation procedure.
    • This technology has the potential to improve FES efficacy for SCI patients.
    • Ongoing acute studies in dogs aim to validate the device and implantation technique.