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Related Experiment Videos

Protamine titration after cardiopulmonary bypass.

D A Dutton, A P Hothersall, A D McLaren

    Anaesthesia
    |March 1, 1983
    PubMed
    Summary

    This study details a protamine titration method using the Haemochron 400 system to reverse heparinization after cardiopulmonary bypass. The method achieved accurate reversal with small protamine doses, establishing a linear relationship for effective heparin reversal.

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    Area of Science:

    • Cardiovascular Surgery
    • Anesthesiology
    • Pharmacology

    Background:

    • Heparin is crucial for anticoagulation during cardiopulmonary bypass (CPB).
    • Reversal of heparin anticoagulation with protamine is essential after CPB.
    • Accurate protamine dosing is vital to avoid complications.

    Purpose of the Study:

    • To describe and evaluate a protamine titration method using the Haemochron 400 system.
    • To assess the efficacy of this method in reversing heparinization post-CPB.
    • To define the relationship between protamine and heparin doses and administration timing.

    Main Methods:

    • A protamine titration method was employed utilizing the Haemochron 400 system.
    • Twenty-three patients undergoing CPB for valve replacement or coronary artery bypass grafting were studied.

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  • Protamine doses were adjusted based on titration to achieve heparin reversal.

    • Main Results:

    • The Haemochron 400 system facilitated accurate reversal of heparinization.
    • Comparatively small doses of protamine were effective in achieving reversal.
    • A linear relationship was established between the protamine-heparin dose ratio and the time interval for single heparin doses.

    Conclusions:

    • The described protamine titration method is effective for heparin reversal post-CPB.
    • This method allows for precise and potentially reduced protamine administration.
    • The defined linear relationship aids in optimizing protamine dosing strategies.