Managing fibrinolysis without aprotinin.

Area of Science:

• Cardiovascular Surgery
• Hematology
• Anesthesiology

Background:

• Cardiopulmonary bypass (CPB) is associated with increased perioperative bleeding.
• CPB can lead to consumptive coagulopathy, characterized by simultaneous thrombin and fibrinolysis.
• Bleeding complications are particularly challenging in complex surgical cases.

Purpose of the Study:

• To review the mechanisms of bleeding associated with CPB.
• To evaluate current treatment protocols for managing coagulopathy during CPB.
• To determine optimal strategies for controlling bleeding in complex surgical procedures.

Main Methods:

• Review of existing literature on CPB-induced coagulopathy.
• Analysis of mechanisms of thrombin formation and fibrinolysis during CPB.
• Evaluation of the efficacy of current antifibrinolytic agents (aprotinin, lysine analogs).

Main Results:

• Thrombin formation and fibrinolysis are prominent in the surgical wound during CPB, peaking at protamine reversal.
• Aprotinin and lysine analogs show limited success in controlling bleeding in complex surgeries, reoperations, aortic resections, and mechanical circulatory device implantations.
• Existing treatments may not adequately address the complex bleeding mechanisms in high-risk patients.

Conclusions:

• Changes in treatment protocols, rather than solely relying on specific antifibrinolytic drugs, may offer improved bleeding control.
• Optimizing CPB management and hemostatic strategies is crucial for reducing perioperative bleeding.
• Further research into tailored treatment protocols is warranted for complex CPB cases.