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Related Experiment Videos

A computerized control system for cardiopulmonary bypass

T Beppu1, Y Imai, Y Fukui

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

The Journal of Thoracic and Cardiovascular Surgery
|March 1, 1995
PubMed
Summary
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A new microcomputer system for cardiopulmonary bypass automatically controls pumps, monitoring key parameters to maintain stable patient fluid volume. This innovative pump control system enhances safety during cardiac operations.

Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Cardiovascular Surgery

Background:

  • Cardiopulmonary bypass requires precise control of fluid dynamics and pressures.
  • Manual control of bypass pumps can be complex and prone to variability.
  • Developing automated systems can improve safety and consistency in bypass procedures.

Purpose of the Study:

  • To develop and evaluate a microcomputer-based pump control system for cardiopulmonary bypass.
  • To assess the system's ability to automatically regulate key hemodynamic parameters.
  • To compare the performance of the automated system with conventional manual control.

Main Methods:

  • A microcomputer system was designed to monitor central venous pressure, aortic pressure, reservoir volume, and venous line status.

Related Experiment Videos

  • Automated control of arterial infusion and venous withdrawal pumps was implemented using a proportional-integral algorithm.
  • A screening algorithm was used to filter pressure measurement artifacts.
  • The system was tested on 15 pediatric patients undergoing cardiac surgery.

    • Main Results:

    • The computerized system satisfactorily controlled perfusion flow and central venous pressure.
    • Stable operation was achieved throughout cardiopulmonary bypass.
    • No significant differences were observed in hemodynamic parameters or fluid balance compared to manual control.
    • The system demonstrated utility in maintaining intravascular volume.

    Conclusions:

    • The developed microcomputer pump control system is effective for cardiopulmonary bypass.
    • The system offers stable and satisfactory control of perfusion parameters.
    • This technology is expected to enhance the safety and reliability of pump perfusion during cardiac operations.