• J. Cardiothorac. Vasc. Anesth. · Nov 2022

    Review

    Heparin Resistance During Cardiopulmonary Bypass in Adult Cardiac Surgery.

    • Yufan Chen, Priscilla Hui Yi Phoon, and Nian Chih Hwang.
    • Department of Anaesthesiology, Singapore General Hospital, Singapore; Department of Cardiothoracic Anesthesia, National Heart Centre, Singapore.
    • J. Cardiothorac. Vasc. Anesth. 2022 Nov 1; 36 (11): 415041604150-4160.

    AbstractThe use of heparin for anticoagulation has changed the face of cardiac surgery by allowing a bloodless and motionless surgical field throughout the introduction of cardiopulmonary bypass (CPB). However, heparin is a drug with complex pharmacologic properties that can cause significant interpatient differences in terms of responsiveness. Heparin resistance during CPB is a weighty issue due to the catastrophic consequences stemming from inadequate anticoagulation, and the treatment of it necessitates a rationalized stepwise approach due to the multifactorial contributions toward this entity. The widespread use of activated clotting time (ACT) as a measurement of anticoagulation during CPB is examined, as it may be a false indicator of heparin resistance. Heparin resistance also has been repeatedly reported in patients infected with COVID-19, which deserves further exploration in this pandemic era. This review aims to examine the variability in heparin potency, underlying mechanisms, and limitations of using ACT for monitoring, as well as provide a framework towards the current management of heparin resistance.Copyright © 2022 Elsevier Inc. All rights reserved.

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