Related Experiment Videos
The effect of warm heart surgery on postoperative bleeding
T M Yau1, S Carson, R D Weisel
1Division of Cardiovascular Surgery, Toronto Hospital, Ontario, Canada.
The Journal of Thoracic and Cardiovascular Surgery
|June 1, 1992
Summary
Normothermic perfusion and antifibrinolytic drugs like tranexamic acid reduce blood loss and preserve platelets during coronary artery bypass grafting surgery. These methods improve patient outcomes by minimizing bleeding and maintaining platelet levels post-operation.
Area of Science:
- Cardiovascular Surgery
- Anesthesiology
- Hematology
Background:
- Hypothermic cardiopulmonary bypass is standard for coronary artery bypass grafting (CABG).
- Concerns exist regarding hypothermia's impact on blood loss and platelet function.
- Antifibrinolytic medications are sometimes used to manage bleeding during cardiac surgery.
Purpose of the Study:
- To compare normothermic versus hypothermic systemic perfusion during isolated, primary CABG.
- To evaluate the effects of tranexamic acid and epsilon-aminocaproic acid on blood loss and platelet levels.
- To determine the combined effects of perfusion temperature and antifibrinolytic drugs.
Main Methods:
- 146 patients undergoing isolated, primary CABG were studied.
- Groups received either normothermic (35-37°C) or moderately hypothermic (25-29°C) perfusion.
- Patients were administered tranexamic acid, epsilon-aminocaproic acid, or no antifibrinolytic drug.
Main Results:
- Normothermic perfusion showed a trend towards less blood loss, but not statistically significant.
- Both tranexamic acid and epsilon-aminocaproic acid significantly reduced blood loss compared to controls.
- Platelet levels were better preserved with normothermic perfusion and antifibrinolytic drugs.
Conclusions:
- Normothermic systemic perfusion, tranexamic acid, and epsilon-aminocaproic acid each independently reduce postoperative blood loss.
- These interventions also contribute to better preservation of circulating platelet levels.
- Combining normothermia with antifibrinolytics may offer further benefits in managing bleeding and platelets post-CABG.