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Related Experiment Videos

Techniques for optimization of pulsatile ventricular assist device support.

T C Mills1, R A Ott

  • 1Baxter L.I.S. Division, Advanced Development, Irvine, California 92714, USA.

Artificial Organs
|April 1, 1992
PubMed
Summary
This summary is machine-generated.

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Researchers developed a simplified method to optimize pulsatile ventricular assist devices (VADs). This approach achieves physiological flow rates and acceptable blood chemistry, improving VAD support efficacy.

Area of Science:

  • Biomedical Engineering
  • Cardiovascular Physiology

Background:

  • Debate exists regarding the efficacy of pulsatile versus nonpulsatile hemodynamic support.
  • Pulsatile ventricular assist devices (VADs) offer physiological pumping but have complex output functions impacting utility.

Purpose of the Study:

  • To develop a simplified approach for optimizing the output function of pulsatile VADs.
  • To evaluate the impact of fill-enhancing vacuum settings on VAD output.
  • To quantitatively assess synchronous versus asynchronous pumping modes concerning coronary perfusion.

Main Methods:

  • Developed a simplified method to determine the VAD system output function.
  • Varied fill-enhancing vacuum settings to find optimal operating points.
  • Employed a quantitative method to compare pumping modes and their effect on coronary perfusion.

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Main Results:

  • Achieved device outputs of approximately 5.5 L/min at physiologic pressures.
  • Demonstrated clinically acceptable blood chemistry with the optimized pulsatile VAD settings.
  • Provided a quantitative evaluation of synchronous and asynchronous pumping modes for coronary perfusion.

Conclusions:

  • A simplified optimization approach for pulsatile VADs has been successfully developed.
  • The method yields significant device output with acceptable blood chemistry.
  • Quantitative assessment of pumping modes aids in improving VAD therapy and coronary perfusion.