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Related Experiment Videos

Electrohydraulic ventricular assist device development.

P D Diegel1, T Mussivand, J W Holfert

  • 1Institute for Biomedical Engineering, University of Utah, Salt Lake City, 84103.

ASAIO Transactions
|July 1, 1991
PubMed
Summary
This summary is machine-generated.

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A novel electrohydraulic ventricular assist device (VAD) prototype was developed. This device utilizes an axial flow pump and internal electronics for active blood pumping and energy management, offering potential advancements in cardiac support.

Area of Science:

  • Biomedical Engineering
  • Cardiovascular Devices
  • Medical Device Technology

Background:

  • Heart failure necessitates advanced mechanical circulatory support.
  • Existing ventricular assist devices (VADs) present various challenges in efficiency and biocompatibility.
  • Development of innovative VADs is crucial for improving patient outcomes.

Purpose of the Study:

  • To design and construct a 64 ml effective stroke volume in vitro electrohydraulic ventricular assist device (VAD) prototype.
  • To evaluate the functional components and energy transfer mechanisms of the VAD.
  • To assess the potential of the electrohydraulic VAD for future clinical applications.

Main Methods:

  • An electrohydraulic VAD prototype was engineered with an axial flow pump and brushless DC motor.

Related Experiment Videos

  • A volume displacement chamber (VDC) and flexing diaphragm facilitated blood pumping via silicone oil.
  • Integrated surface mount electronics managed motor commutation, energy, telemetry, and physiologic control.
  • External and internal power sources (12 V DC, rechargeable batteries) were utilized with transcutaneous energy transfer (TET).
  • Bidirectional infrared telemetry enabled internal and external controller communication.

    • Main Results:

    • A functional 64 ml electrohydraulic VAD prototype was successfully built and tested in vitro.
    • The device demonstrated active pumping during both systole and diastole through controlled motor reversal.
    • Integrated electronic control and transcutaneous energy transfer were implemented.
    • The system facilitated bidirectional data communication via infrared telemetry.

    Conclusions:

    • The developed electrohydraulic VAD prototype shows promise as a novel approach to mechanical circulatory support.
    • The design integrates efficient energy conversion, active filling, and advanced control systems.
    • Further research and development are warranted to optimize the VAD for in vivo applications and clinical translation.