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Related Experiment Videos

Hemolysis in different centrifugal pumps

K Kawahito1, Y Nosé

  • 1Department of Surgery, Baylor College of Medicine, Houston, Texas 77030, USA.

Artificial Organs
|April 1, 1997
PubMed
Summary

Impeller-type centrifugal pumps cause less blood hemolysis than cone-type pumps during cardiopulmonary support procedures. This finding is crucial for selecting pumps in extracorporeal therapies to minimize blood damage.

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Area of Science:

  • Biomedical Engineering
  • Cardiovascular Science

Background:

  • Centrifugal pumps are vital in extracorporeal circulation but can cause hemolysis.
  • Hemolytic characteristics vary by pump type and clinical application.
  • Understanding pump-induced hemolysis is critical for patient safety in cardiac support.

Purpose of the Study:

  • To compare the hemolytic properties of cone-type and impeller-type centrifugal pumps.
  • To evaluate pump performance under simulated cardiopulmonary bypass (CPB), extracorporeal membrane oxygenation (ECMO), and percutaneous cardiopulmonary support (PCPS) conditions.
  • To assess pump hemolysis during left ventricular assist device (LVAD) applications.

Main Methods:

  • Experimental comparison of Medtronic BioMedicus BP-80 (cone-type) with Nikkiso HMS-12 and Terumo Capiox (impeller-type) pumps.
  • Simulated clinical scenarios including CPB, ECMO, PCPS, and LVAD support.
  • Quantification of hemolysis using normalized indexes of hemolysis (NIHs).

Main Results:

  • No significant difference in NIH among pumps when used as LVADs.
  • The BP-80 (cone-type) exhibited 3-fold higher hemolysis during CPB compared to impeller types.
  • The BP-80 showed 3-4 fold higher hemolysis during ECMO and 5.5-fold higher during PCPS than impeller types.

Conclusions:

  • Impeller-type centrifugal pumps (Nikkiso HMS-12, Terumo Capiox) demonstrate superior hemocompatibility over cone-type pumps (Medtronic BioMedicus BP-80) in high-pressure difference scenarios.
  • Impeller pumps are preferable for CPB, ECMO, and PCPS to minimize blood cell damage.
  • Pump design significantly impacts hemolysis, influencing clinical device selection for extracorporeal therapies.

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