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Related Experiment Videos

A high voltage, constant current stimulator for electrocutaneous stimulation through small electrodes.

C J Poletto1, C L Van Doren

  • 1Department of Biomedical Engineering, Case Western Reserve University, Cleveland, OH 44109-1998, USA. cxp17@po.cwru.edu

IEEE Transactions on Bio-Medical Engineering
|August 4, 1999
PubMed
Summary

A novel high-voltage stimulator enables transcutaneous tactile nerve stimulation of the fingertip. This device offers precise current control and rapid pulse rise times for advanced sensory feedback applications.

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Area of Science:

  • Biomedical Engineering
  • Neuroscience
  • Electrical Engineering

Background:

  • Transcutaneous electrical stimulation is crucial for sensory feedback.
  • Existing devices often lack the high voltage compliance needed for fingertip tactile stimulation.
  • Accurate and safe stimulation parameters are essential for clinical applications.

Purpose of the Study:

  • To design and develop a high-voltage stimulator for transcutaneous tactile fiber stimulation.
  • To achieve high compliance voltage and precise current control for fingertip stimulation.
  • To address power supply challenges and ensure safety for hospital environments.

Main Methods:

  • Utilized an improved Howland current pump topology for the output stage.
  • Employed commercially available high-voltage operational amplifiers to reach ~800 V compliance.

Related Experiment Videos

  • Implemented an optically coupled input stage for computer control and safety compliance.

    • Main Results:

    • Achieved output current accuracy better than +/- 5% from 1 to 25 mA for pulses >= 30 microseconds.
    • Demonstrated a rise time of less than 1 microsecond for square pulses.
    • Successfully addressed high-voltage, common-mode, and latch-up power supply issues.

    Conclusions:

    • The developed high-voltage stimulator effectively enables transcutaneous tactile stimulation of the fingertip.
    • The design offers precise current control, fast response times, and high voltage compliance.
    • The stimulator meets safety standards for hospital use and can be adapted for biphasic stimulation.