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Related Experiment Videos

Prosthetic valve selection for a pulsatile LVAD.

S G Kovacs1, P P McKeown

  • 1College of Medicine, University of South Florida, Tampa.

Journal of Clinical Engineering
|November 1, 1991
PubMed
Summary
This summary is machine-generated.

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The St. Jude Medical (SJM) valve performed best in Magnetically Actuated Left Ventricle Assist Device (MALVAD) testing, outperforming Medtronic Hall (MH) and Bjork-Shiley Convex-Concave (BSCC) valves. The BSCC valve was deemed marginal for LVAD use.

Area of Science:

  • Biomedical Engineering
  • Cardiovascular Devices
  • Prosthetic Valve Technology

Background:

  • Left Ventricle Assist Devices (LVADs) require highly reliable prosthetic valves.
  • Evaluating existing clinical valves is crucial for developing advanced LVADs like the Magnetically Actuated Left Ventricle Assist Device (MALVAD).

Purpose of the Study:

  • To assess the suitability of three common clinical prosthetic valves for LVAD applications.
  • To compare the performance of St. Jude Medical (SJM), Medtronic Hall (MH), and Bjork-Shiley Convex-Concave (BSCC) valves in a MALVAD mock loop.

Main Methods:

  • Bench testing of 25 mm lumen size SJM, MH, and BSCC valves within a mock loop.
  • Hydraulic parameters included constant 100 mmHg after-load, 3-18 mmHg preload, and 60-80 bpm beat rate.

Related Experiment Videos

  • Pump actuator power was standardized for all tested valves.

    • Main Results:

    • SJM valves showed statistically superior performance over MH and BSCC valves at 5 mmHg fill pressure.
    • At 10 mmHg fill pressure, SJM and MH valves demonstrated significantly better flow rates than the BSCC valve.
    • BSCC valves were classified as marginal candidates for LVAD use due to performance limitations.

    Conclusions:

    • The SJM valve is a strong candidate for MALVAD applications based on hydraulic performance.
    • MH and SJM valves exhibited comparable flow rates, necessitating further evaluation based on mechanical ruggedness and design integration.
    • BSCC valves present limitations for LVAD use, highlighting the importance of valve selection in device development.