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Related Experiment Videos

A continuous cardiac output computer based on thermodilution principles.

R A Normann1, R W Johnson, J E Messinger

  • 1Department of Bioengineering, University of Utah, Salt Lake City 84112.

Annals of Biomedical Engineering
|January 1, 1989
PubMed
Summary
This summary is machine-generated.

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A new, self-contained instrument accurately measures cardiac output using thermodilution. This microcomputer-controlled device enables continuous blood flow monitoring minute-by-minute without technician assistance.

Area of Science:

  • Cardiovascular physiology
  • Medical instrumentation
  • Biomedical engineering

Background:

  • Cardiac output (CO) measurement is crucial for assessing heart function and guiding clinical decisions.
  • Conventional CO monitoring often requires specialized personnel and may not provide continuous data.
  • Thermodilution is a well-established technique for CO assessment.

Purpose of the Study:

  • To develop and evaluate a novel, fully automated instrument for continuous cardiac output measurement.
  • To assess the accuracy and reproducibility of the new thermodilution-based system.
  • To demonstrate the feasibility of a stand-alone device for real-time blood flow monitoring.

Main Methods:

  • A microcomputer-controlled instrument utilizing thermodilution principles was developed.

Related Experiment Videos

  • A resistive heating element on a catheter delivered a heat bolus, with temperature changes monitored by a thermistor.
  • Performance was validated in a mock circulatory loop and in canine models for extended periods.

    • Main Results:

    • The instrument provided minute-by-minute cardiac output determinations.
    • Accuracy and reproducibility were comparable to conventional cardiac output monitors.
    • The system demonstrated reliable performance over extended testing durations.

    Conclusions:

    • A self-contained, automated thermodilution instrument for cardiac output measurement is feasible.
    • The developed system offers continuous blood flow monitoring capabilities.
    • This technology has the potential to reduce reliance on technicians for CO assessments.