Optimization of thromboelastography-guided platelet transfusion in cardiovascular surgery

Area of Science:

• Cardiovascular Surgery
• Hematology
• Transfusion Medicine

Background:

• Cardiopulmonary bypass (CPB) often leads to platelet dysfunction and bleeding complications.
• Thromboelastography (TEG) assesses coagulopathy, but its role in guiding platelet transfusions (PT) post-CPB is not well-defined.

Purpose of the Study:

• To evaluate the effectiveness of a TEG-guided PT protocol in patients undergoing cardiovascular surgery with CPB.
• To compare PT utilization and bleeding outcomes between a standard empiric protocol and a TEG-guided protocol.

Main Methods:

• 100 patients undergoing valvular or thoracic aortic surgery were studied.
• Platelet count and TEG maximum amplitude (MA) were measured.
• Patients were randomized to either an empiric PT protocol (Group C, n=50) or a TEG-guided PT protocol (Group T, n=50), targeting MA <35 mm and platelet count <7 × 10(4)/mm(3).

Main Results:

• Platelet transfusion was significantly lower in the TEG-guided group (22%) compared to the empiric group (48%) (P < 0.01).
• This difference was highly significant in aortic arch aneurysm repair patients (20% vs. 100%, P < 0.01).
• No significant difference in bleeding complications was observed between the groups.

Conclusions:

• A TEG-guided PT protocol substantially decreases platelet transfusion requirements after CPB.
• This strategy is particularly beneficial for patients undergoing complex aortic arch aneurysm repair.
• TEG-guided protocols can optimize transfusion practices without compromising patient safety.