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Miniature circulatory support power transformer.

D B Melvin1, A J Helmicki, D L Glos

  • 1Department of Surgery, University of Cincinnati, OH 45267-0558, USA.

ASAIO Journal (American Society for Artificial Internal Organs : 1992)
|August 5, 2000
PubMed
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This study developed a novel, implantable power system using an ileal pouch to deliver electricity to medical devices, minimizing infection risks and improving patient freedom.

Area of Science:

  • Biomedical Engineering
  • Implantable Devices
  • Power Transfer Systems

Background:

  • Direct power delivery to intracorporeal devices risks infection.
  • Existing transcutaneous transformers have magnetic flux leakage issues.
  • An ileal pouch barrier offers a novel solution to mitigate risks.

Purpose of the Study:

  • To develop and evaluate a novel implantable power system using an ileal pouch.
  • To miniaturize and optimize transformer design for enhanced efficiency and safety.
  • To assess the feasibility of wireless power transfer for circulatory support devices.

Main Methods:

  • Utilized ileum to create a surgical pouch barrier instead of skin.
  • Designed and tested toroidal transformers with complete magnetic circuits.

Related Experiment Videos

  • Conducted in vivo trials in dogs and goats, alongside in vitro electrical testing.
  • Employed computational modeling and cadaver studies for design optimization.

    • Main Results:

    • Previous toroidal design showed 97.2% AC/AC and 84.2% DC/DC efficiency with minimal tissue warming.
    • New transformer design achieved 96% AC-AC efficiency.
    • Ileal pouch and transformer system fit within the abdominal wall for discreet implantation.

    Conclusions:

    • The ileal pouch-based wireless power system offers a safe and efficient method for intracorporeal devices.
    • This technology promises "forgettable" power delivery, enhancing patient mobility and activity.
    • Potential for significant advancements in long-term circulatory support device management.