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Related Experiment Videos

A full-to-empty mode controller for the pneumatically-driven blood pump.

K Y Jiang1, H S Wang

  • 1Division of Biomedical Engineering and Computing, Vanderbilt University School of Medicine, Nashville, TN 37232-2155.

Computer Methods and Programs in Biomedicine
|May 1, 1991
PubMed
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This study introduces a novel microprocessor controller for diaphragm blood pumps, utilizing finite state automata to reliably detect pumping cycle phases and ensure continuous operation through a fail-safe mechanism.

Area of Science:

  • Biomedical Engineering
  • Control Systems Engineering

Background:

  • Pneumatically-driven diaphragm blood pumps are crucial in medical applications.
  • Accurate detection of pumping cycle phases (end-ejection, end-filling) is essential for efficient operation.
  • Existing control systems may lack robustness in phase detection.

Purpose of the Study:

  • To develop a microprocessor-based controller for pneumatically-driven diaphragm blood pumps.
  • To implement a control strategy based on finite state automata theory.
  • To ensure reliable operation in full-to-empty mode, even with waveform variations.

Main Methods:

  • Development of a microprocessor controller using finite state automata.
  • Real-time sampling and analysis of driving air pressure waveforms.

Related Experiment Videos

  • Matching sampled waveforms to predefined sequential phases to detect end-ejection and end-filling.
  • Implementation of a fail-safe mechanism using parameters from the last cycle if detection fails.

    • Main Results:

    • The controller successfully identified end-ejection and end-filling points in laboratory tests.
    • The fail-safe measure demonstrated reliability, ensuring uninterrupted pump operation.
    • The system effectively matched real-time pressure waveforms with theoretical pump phases.

    Conclusions:

    • The developed microprocessor controller based on finite state automata is effective for diaphragm blood pumps.
    • The controller ensures reliable and continuous blood pump operation through accurate phase detection and a robust fail-safe system.
    • This approach offers a dependable solution for controlling pneumatically-driven blood pumps in critical applications.