Protamine titration after cardiopulmonary bypass

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.
• 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.