Comparison of the effects of aprotinin and tranexamic acid on blood loss and red blood cell transfusion requirements during the late stages of liver transplantation.
BACKGROUND
During liver transplantation (LT), profound activation of the fibrinolytic system can contribute significantly to perioperative bleeding. Prophylactic administration of antifibrinolytic agents has been shown to reduce blood loss and the need for allogeneic transfusion in these conditions.


METHODS
This prospective randomized trial included 51 cirrhotic patients undergoing LT. Patients were randomly assigned to receive either 280 mg of aprotinin (AP) followed by 70 mg per hour or 40 mg per kg tranexamic acid (TA) followed by 40 mg per kg per hour, administered from the end of the anhepatic phase until 2 hours after reperfusion of the graft, and the effects on blood loss and red blood cell (RBC) transfusion requirements were compared. Transfusion policy was standardized in all patients. In addition, the biological effects of the two drugs, as assessed by coagulation and fibrinolytic markers obtained during surgery, were evaluated in a subgroup of patients from each treatment group and compared with an historical control group that did not receive antifibrinolytic drugs.


RESULTS
There was no significant difference between the two groups in perioperative blood losses (AP, 6200 [4620-8735] mL; TA, 5945 [4495-8527] mL; median [range]) or in RBC transfusions requirements (AP, 9 [6.75-15.25] units; TA, 10 [6.5-13.5] units). Inhibition of fibrinolysis was observed with both drugs compared with the control group. Coagulation appeared to be activated more with AP, however, whereas fibrinolysis was inhibited more by TA.


CONCLUSIONS
Blood losses and RBC transfusion requirements were comparable regardless of the drug administered. TA may be as valuable as AP for controlling fibrinolysis in LT.
Department of Anesthesiology, the Department of Surgery, the Intensive Care Unit, Hospital Erasme, Brussels, Belgium. brigitte.ickx@ulb.ac.be
Brigitte E
BE
Ickx
Philippe J
PJ
van der Linden
Christian
C
Melot
Walter
W
Wijns
Luc
L
de Pauw
Jean
J
Vandestadt
Florence
F
Hut
Olivier
O
Pradier
D000328:Adult; D007611:Aprotinin / Q000627:therapeutic use*; D016063:Blood Loss, Surgical / Q000517:prevention & control*; D017707:Erythrocyte Transfusion; D005260:Female; D005342:Fibrinolysis / Q000187:drug effects; D006490:Hemostatics / Q000627:therapeutic use*; D006801:Humans; D007430:Intraoperative Care; D008103:Liver Cirrhosis / Q000601:surgery; D016031:Liver Transplantation; D008297:Male; D008875:Middle Aged; D019106:Postoperative Hemorrhage; D014148:Tranexamic Acid / Q000627:therapeutic use*
D006490:Hemostatics; D014148:Tranexamic Acid; D007611:Aprotinin