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[Hematological differences between the effects of roller vs, centrifugal pump]

O González Chon1, P Luna, J Molina

  • 1Departamento de Anestesia, Instituto Nacional de Cardiología Ignacio Chávez, México, D.F.

Archivos Del Instituto De Cardiologia De Mexico
|January 1, 1996
PubMed
Summary

Centrifugal pumps may better preserve blood factors like Factor VIII, fibrinogen, and platelets during cardiopulmonary bypass (CPB) compared to roller pumps. However, no significant differences in blood transfusions or post-operative bleeding were observed between the two pump types.

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Area of Science:

  • Cardiovascular Surgery
  • Hematology
  • Biomedical Engineering

Background:

  • Post-operative bleeding is a complication of cardiopulmonary bypass (CPB).
  • This bleeding arises from changes in red blood cells and activation of coagulation, fibrinolysis, and complement systems.
  • Different CPB pump technologies may influence these hematological changes.

Purpose of the Study:

  • To compare the hematological effects of centrifugal pumps versus roller pumps during CPB.
  • To evaluate blood product utilization and post-operative bleeding in patients undergoing CPB with different pump types.

Main Methods:

  • A comparative study involving 12 patients using a centrifugal pump and 12 using a roller pump.
  • Evaluation of blood cell behavior and coagulation factors.

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  • Measurement of blood product consumption and post-operative bleeding.

    • Main Results:

    • Centrifugal pumps demonstrated a trend towards better preservation of Factor VIII, fibrinogen, and platelets (p < 0.05).
    • No statistically significant differences in blood product transfusion requirements were found between the groups.
    • Patients in the centrifugal pump group showed improved perfusion during CPB.
    • Post-operative bleeding at 24 hours was similar in both groups.

    Conclusions:

    • Centrifugal pumps may offer a tendency towards better preservation of key hemostatic factors during CPB.
    • Despite potential hematological advantages, centrifugal and roller pumps showed comparable outcomes regarding blood transfusion needs and post-operative bleeding in this study.
    • Enhanced perfusion observed with centrifugal pumps warrants further investigation.