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Related Experiment Videos

A computer controlled pulsatile pump: preliminary study

M S Zwarts1, S R Topaz, D N Jones

  • 1Kolff's Laboratory, Department of Bioengineering, University of Utah, Salt Lake City, USA.

The International Journal of Artificial Organs
|December 1, 1996
PubMed
Summary
This summary is machine-generated.

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A novel Stepper Motor Driven Reciprocating Pump (SDRP) offers a promising alternative for medical fluid circulation. This pump generates pulsatile flow with low hemolysis, suitable for cardiopulmonary bypass and dialysis.

Area of Science:

  • Biomedical Engineering
  • Medical Devices

Background:

  • Existing roller and rotary pumps have limitations in medical applications.
  • Artificial hearts and ventricular assist devices utilize similar ventricle designs.

Purpose of the Study:

  • To introduce and evaluate a Stepper Motor Driven Reciprocating Pump (SDRP) as a replacement for conventional pumps.
  • To assess the SDRP's suitability for applications like cardiopulmonary bypass and hemodialysis.

Main Methods:

  • The SDRP employs a stepper motor and linkage belt to drive a reciprocating motion.
  • This motion actuates a sphere against blood pumping ventricles, generating pulsatile flow.
  • Studies involved pressure and flow measurements using water and preliminary blood circulation tests.

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Main Results:

  • The SDRP produces pulsatile flow and has a minimal priming volume.
  • Integrated motor driver limits outflow pressure, acting as a safety feature.
  • Preliminary blood studies demonstrated low hemolysis over 16 hours of circulation.

Conclusions:

  • The SDRP is a viable alternative to roller and rotary pumps for medical fluid circulation.
  • Its design offers safety features and low hemolysis, beneficial for blood-related applications.
  • Further development could integrate dual pumps for enhanced functionality.