D-Dimer formation during cardiac and noncardiac thoracic surgery

Area of Science:

• Cardiovascular Surgery
• Hematology
• Anesthesiology

Background:

• Therapeutic decisions for perioperative excessive fibrinolysis are challenged by the lack of near-site monitoring.
• Assessing fibrinolysis is crucial for managing patients undergoing thoracic surgery, especially with extracorporeal circulation.

Purpose of the Study:

• To investigate the utility of a latex agglutination D-dimer assay for detecting perioperative fibrinolysis.
• To determine the relationship between D-dimer levels, extracorporeal circulation, surgical procedure type, and chest tube drainage in thoracic surgery patients.

Main Methods:

• A latex agglutination D-dimer assay was used to measure perioperative fibrinolysis.
• Patients undergoing thoracic surgery with (n=27) and without (n=20) cardiopulmonary bypass (CPB) were studied.
• D-dimer levels were analyzed in relation to CPB use, surgical type, and postoperative drainage.

Main Results:

• Significant intragroup changes in D-dimer levels were observed in both cardiac surgery (with CPB) and non-cardiac thoracic surgery (without CPB) patients.
• Postoperative D-dimer levels increased significantly in non-CPB patients, while intraoperative levels increased in CPB patients.
• D-dimer levels did not correlate with mediastinal/chest tube drainage in cardiac surgery patients requiring CPB.

Conclusions:

• The latex agglutination D-dimer assay effectively detects excessive perioperative fibrinolysis in thoracic surgery patients.
• Extracorporeal circulation significantly influences the pattern of D-dimer formation during thoracic surgery.