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Related Experiment Videos

Injectable microstimulator for functional electrical stimulation.

G E Loeb1, C J Zamin, J H Schulman

  • 1Biomedical Engineering Unit, Queen's University, Kingston, Ontario, Canada.

Medical & Biological Engineering & Computing
|November 1, 1991
PubMed
Summary
This summary is machine-generated.

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This study presents injectable microstimulators for functional electrical stimulation. These devices are powered wirelessly and can precisely control stimulation parameters for up to 256 units.

Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Materials Science

Background:

  • Functional electrical stimulation (FES) requires implantable devices for therapeutic applications.
  • Existing FES systems often involve complex surgical implantation procedures.
  • Miniaturization and wireless power transfer are key challenges in developing advanced FES systems.

Purpose of the Study:

  • To describe the design and characteristics of a novel family of injectable microstimulators for FES.
  • To demonstrate a system for wireless power and data transmission to these microstimulators.
  • To enable precise digital control over stimulation parameters for multiple implanted devices.

Main Methods:

  • Development of hermetically sealed, injectable glass capsule microstimulators.

Related Experiment Videos

  • Utilizing inductive coupling for wireless power and command signal transmission from an external coil.
  • Employing an electrolytic capacitor formed by tantalum and iridium electrodes for energy storage.
  • Implementing a Class E amplifier for efficient power delivery and digital signal encoding.

    • Main Results:

    • Successfully designed and characterized injectable microstimulators for FES.
    • Demonstrated wireless power and digital command signal reception via inductive coupling.
    • Achieved energy storage using specialized electrode materials for intermittent stimulation.
    • Enabled digital control of pulse amplitude, duration, and timing for up to 256 microstimulators.

    Conclusions:

    • The developed microstimulators offer a minimally invasive approach to FES.
    • Wireless power and digital control facilitate advanced and adaptable stimulation protocols.
    • This technology holds potential for various therapeutic applications requiring precise neural modulation.