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Related Experiment Videos

An automatic flow controller for a centrifugal blood pump

T Beppu1, K Seo, Y Imai

  • 1Department of Pediatric Cardiovascular Surgery, Heart Institute of Japan, Tokyo Women's Medical College, Japan.

Artificial Organs
|July 1, 1997
PubMed
Summary
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A new microcomputer controller precisely regulates centrifugal blood pump flow rates. This automated system ensures patient safety and maintained perfusion within +/-6% of the set point during cardiac operations.

Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Control Systems

Background:

  • Centrifugal blood pumps are crucial in cardiac surgery for maintaining blood circulation.
  • Precise regulation of pump perfusion flow rate is essential for patient safety and optimal outcomes.
  • Existing control systems may lack advanced safety features and real-time adjustments.

Purpose of the Study:

  • To develop and evaluate a microcomputer-based controller for regulating the perfusion flow rate of a centrifugal blood pump.
  • To enhance the safety and reliability of blood pump control during cardiac operations.
  • To assess the accuracy and stability of the automated flow control system.

Main Methods:

  • Development of a microcomputer controller integrating data from flowmeters, pump speed, aortic pressure, and reservoir volume.

Related Experiment Videos

  • Implementation of a discrete integral controller with a 1-second control interval.
  • Integration of safety functions to detect tubing clamps, flow sensor dislocation, or reverse flow.

    • Main Results:

    • The controller successfully maintained the pump perfusion flow rate within +/-6% of the set point in 5 cardiac surgery patients.
    • The system demonstrated effective regulation by minimizing forward or backward flow during pump initiation.
    • Safety features successfully detected potential issues like tubing clamps or sensor malfunctions.

    Conclusions:

    • The developed microcomputer controller provides accurate and safe regulation of centrifugal blood pump perfusion.
    • The automated system enhances patient safety through integrated monitoring and detection of critical events.
    • This technology holds promise for improving the management of cardiopulmonary bypass during cardiac surgery.