• J. Thorac. Cardiovasc. Surg. · May 1977

    Monitoring of intraoperative heparinization and blood loss following cardiopulmonary bypass surgery.

    • R Babka, C Colby, A El-Etr, and R Pifarré.
    • J. Thorac. Cardiovasc. Surg. 1977 May 1;73(5):780-2.

    AbstractTwo protocols of heparin management during cardiopulmonary bypass were compared to assess the role of the activated clotting time (ACT) in relation to postoperative blood loss. The study was divided into two groups: Group I, the control group, in which 3 mg. of heparin per kilogram was given as the initial dose and maintained at a dose of 1.5 mg. per kilogram every 45 minutes during cardiopulmonary bypass, and Group II, in which the initail dose of heparin was 2 mg. per kilogram and additional dosage were based upon the ACT. We found a striking decrease in postoperative blood loss as well as a decrease in the amount of heparin administered during cardiopulmonary during cardiopulmonary bypass in Group II patients. In addition, less protamine was required to neutralize the heparin in the second group after bypass. Thus, when patients are given too much heparin, as in our control group, the effectiveness of protamine is decreased. We would like to stress the value of the ACT in controlling heparin administration as well as postoperative blood loss in cardiopulmonary bypass surgery.

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