Heparin Anticoagulation Management During Cardiopulmonary Bypass

Contemporary Clinical Practices in Anticoagulation Management During Cardiopulmonary Bypass: A Europe-Wide Survey

March 10, 2026 No Comments

A Europe-wide survey of 114 cardiac surgery centers across 29 countries evaluated current anticoagulation practices during cardiopulmonary bypass. Most centers reported standardized heparin protocols and commonly used a 300 IU/kg initial dose with ACT targets of 400–480 seconds. However, substantial variability existed in protamine reversal strategies, post-reversal ACT targets, and transfusion decision-making, highlighting gaps between guidelines and real-world practice. These findings identify key opportunities for standardizing perioperative anticoagulation management in cardiac surgery.

Balancing Bleeding and Clotting: Anticoagulation Strategies During ECMO Support

Efficacy of Reduced-Intensity or No Heparin Versus Standard Heparin Anticoagulation in Patients on Extracorporeal Membrane Oxygenation: A Systematic Review and Meta-AnalysiS

February 17, 2026 No Comments

This systematic review and meta-analysis of 11 studies (958 ECMO patients) compared reduced-intensity or no heparin anticoagulation with standard heparin strategies. Low/no heparin significantly reduced bleeding complications (OR 0.49) without increasing thrombotic events or in-hospital mortality. Transfusion requirements showed no significant difference. Findings support individualized anticoagulation strategies, though high-quality randomized trials remain needed.

An In-Vitro Study of the Timing Between Protamine Sulfate Administration and Cardiotomy Suction Termination

January 28, 2026 No Comments

This in-vitro study evaluates the optimal timing for discontinuing cardiotomy suction during cardiopulmonary bypass (CPB) when reversing heparin anticoagulation with protamine sulfate. Using porcine blood samples, the researchers assessed activated clotting times (ACTs) after administering a protamine test dose (PTD) and 1/3 of the full dose. Results showed significant ACT reductions after each stage, suggesting early suction termination is vital to preserve circuit integrity.

Protamine Test Dose: Impact on Activated Clotting Time and Circuit Integrity

March 8, 2025 No Comments

This study examines the effect of a protamine test dose (PTD) on activated clotting times (ACTs) and cardiopulmonary bypass (CPB) circuit integrity in 120 cardiac surgery patients. The study found that PTDs led to unpredictable and often significant reductions in ACT, increasing the risk of clot formation in the CPB circuit. The authors recommend discontinuing the recovery of mediastinal shed blood into the CPB circuit before protamine administration to enhance patient safety.

Anticoagulation Monitoring During ECMO Support: Monitor or Flip a Coin?

December 20, 2024 No Comments

This editorial reviews the complexities of anticoagulation monitoring during extracorporeal membrane oxygenation (ECMO), emphasizing the balance between preventing thromboembolic events and minimizing hemorrhagic risks. Current tools like ACT, aPTT, and anti-factor Xa assays are evaluated for their efficacy and limitations. While aPTT remains widely used, anti-factor Xa is emerging as a promising alternative. The authors call for more research and advanced monitoring strategies to improve clinical outcomes.

Temperature Effect on Coagulation Function in Mild Hypothermic Patients Undergoing Thoracic Surgeries: Thromboelastography (TEG) Versus Standard Tests

December 4, 2024 No Comments

This study compared coagulation monitoring methods in mild hypothermic patients during thoracic surgery. Thromboelastography (TEG) detected significant coagulation impairments, including delayed clot formation and reduced clot strength, which standard tests failed to reveal. Temperature-adjusted TEG showed worse coagulation function at core hypothermic temperatures. Findings suggest TEG’s superiority for hemostatic monitoring and transfusion guidance in hypothermic surgical patients.

Efficacy of Goal-Directed Versus Preemptive Tranexamic Acid Administration in Cardiovascular Surgery: The GDT Trial

December 4, 2024 No Comments

The GDT trial compares goal-directed tranexamic acid (TXA) administration guided by rotational thromboelastometry (ROTEM) to preemptive TXA administration in cardiovascular surgery. This multi-center, double-blind, randomized trial aims to determine non-inferiority in reducing postoperative bleeding. Secondary outcomes include transfusion rates, thromboembolic complications, seizures, and hospital costs. The study hypothesizes that selective TXA administration will lower adverse events compared to preemptive dosing.

Prospective Randomized Pilot Study Comparing Bivalirudin Versus Heparin in Pediatric ECMO

November 28, 2024 No Comments

This pilot randomized controlled trial compared bivalirudin and unfractionated heparin for anticoagulation in 30 pediatric ECMO patients. No difference was found in time at goal anticoagulation, the primary endpoint. However, bivalirudin was associated with higher thrombotic complications (37.5% vs. 0%; p=0.02) but required fewer RBC transfusions (median 6.3 vs. 12.2 mL/kg/day; p=0.02). The study demonstrates feasibility for larger trials to evaluate the safety and efficacy of bivalirudin in pediatric ECMO.

Protamine Dosing for Heparin Reversal After Cardiopulmonary Bypass: A Double-Blinded Prospective Randomized Control Trial Comparing Two StrategieS

November 24, 2024 No Comments

This study compared two protamine dosing strategies for heparin reversal after cardiopulmonary bypass: a fixed 250-mg dose versus a 1:1 (1 mg:100 U heparin) ratio-based approach. The trial included 125 elective adult cardiac surgery patients. Both methods showed similar activated clotting times and postoperative bleeding, but the fixed-dose group used significantly less protamine. These results suggest fixed dosing may optimize drug conservation without compromising safety or efficacy.

Thromboembolic Complications in Continuous Versus Interrupted Anticoagulation During Venovenous Extracorporeal Membrane Oxygenation: A Multicenter Study

September 28, 2024 No Comments

This study investigates thromboembolic complications in patients undergoing venovenous extracorporeal membrane oxygenation (ECMO) with continuous versus interrupted anticoagulation. Data from 346 patients across three ECMO centers were analyzed. Results showed no significant difference in thrombotic complications between the groups, although interruptions in anticoagulation were linked to increased thrombotic events as the frequency and duration of interruptions rose.