Heparin Activity Following Titration-Guided Protamine Reversal After Cardiopulmonary Bypass: Impact on Postoperative Bleeding.
Mattias Törnudd, Sofia Ramström, John-Peder Escobar Kvitting et al.
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In 30 seconds
This controlled clinical trial evaluated postoperative heparin activity in 40 patients undergoing elective coronary artery bypass grafting with cardiopulmonary bypass. The study found that residual heparin activity was common after low-dose, titration-guided protamine reversal, with 60% of patients showing detectable levels upon ICU arrival. Notably, no association was found between heparin activity and postoperative bleeding.
Key findings
- 60% of patients had detectable anti-FXa activity upon ICU arrival after protamine reversal.
- The mean protamine to heparin ratio was 0.54 ± 0.14 mg/100 U.
- Three hours after ICU arrival, anti-FXa activity increased to 0.18 ± 0.10 U/mL, with 98% detectable levels.
- No association was found between heparin activity and postoperative bleeding.
Why it matters
Understanding the dynamics of heparin reversal is crucial for managing anticoagulation in postoperative patients. This study highlights the prevalence of residual heparin activity, which may influence clinical decisions regarding monitoring and intervention post-surgery.