Coagulation and fibrinolysis during lung surgery:an experimental study

Area of Science:

• Thoracic Surgery
• Hematology
• Surgical Complications

Background:

• Postoperative thromboembolism is a significant risk in surgery.
• Incidence of thromboembolism is notably lower after lung cancer surgery compared to other specialties.
• The underlying reasons for this reduced risk remain unclear.

Purpose of the Study:

• To investigate the potential role of the lungs as reservoirs of anticoagulant or fibrinolytic substances.
• To explore if lung manipulation during surgery releases these substances, potentially explaining lower thromboembolism rates.

Main Methods:

• 10 anesthetized pigs underwent standardized lung manipulation, including single-lung ventilation and pneumonectomy.
• Blood samples were analyzed for fibrinolytic, procoagulant, and anticoagulant factors before and after lung manipulation.

Main Results:

• A transient decrease in activated partial thromboplastin time (aPTT) and plasminogen activator inhibitor was observed post-manipulation.
• Pneumonectomy led to a minor decrease in antithrombin and a significant increase in aPTT.
• Most other measured coagulation and fibrinolysis factors remained stable.

Conclusions:

• Experimental lung manipulation did not reveal significant changes in fibrinolytic or anticoagulant substances.
• Observed minor changes were transient and not clinically significant.
• Further human studies are needed to understand the low incidence of thromboembolism in thoracic surgery.