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Related Experiment Videos

A computer controlled versatile pulse duplicator for precision testing of artificial heart valves

K Schichl1, K Affeld

  • 1Hermann-Föttinger-Institut, Technische Universität Berlin, Germany.

The International Journal of Artificial Organs
|October 1, 1993
PubMed
Summary

A novel test device for artificial heart valves ensures accurate flow and pressure measurements. This new method eliminates external influences, providing reliable and reproducible results for valve performance assessment.

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Devices
  • Fluid Dynamics

Background:

  • Existing artificial heart valve testing devices face challenges in accurately simulating physiological flow and arterial load.
  • Difficulties in precise flow generation and assessment limit the reliability of current artificial heart valve testing methodologies.

Purpose of the Study:

  • To introduce a novel test device for artificial heart valves that overcomes limitations of previous methods.
  • To enable precise measurement of pressure loss, closure time, closing and leakage volumes, and energy loss in artificial heart valves.

Main Methods:

  • A computer-controlled piston drives fluid through the artificial heart valve without afterload.
  • Systolic outflow follows a standardized physiological curve, identical for all valves of a given size.

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  • Diastolic pressure difference follows a mathematically defined physiological curve.

    • Main Results:

    • The new device provides precise control over fluid dynamics, ensuring accurate assessment of valve function.
    • Measurements are independent of external factors such as the testing machine, laboratory, or operator.
    • Standardized physiological curves ensure reproducibility and comparability of results across different tests and valves.

    Conclusions:

    • The developed test device offers a significant advancement in the reliable and reproducible assessment of artificial heart valve performance.
    • This approach minimizes variability, leading to more accurate and dependable data for artificial heart valve research and development.
    • The device's design ensures that measurements reflect intrinsic valve characteristics rather than external testing conditions.