the ulinastatin group receiving ulinastatin (300,000 unit after anesthesia induction and another 300,000 unit during Y- graft anastomosis, n = 40), the control group receiving the same volume of saline solution(n = 40)

The purpose of this study was to evaluate whether ulinastatin significantly affect on coagulation and blood loss in high risk patients undergoing off-pump coronary bypass surgery (OPCAB). - thrombin-antithrombin complex (TAT), prothrombin fragment 1+2(F1,2), platelet factor-4 (PF-4) , hemoglobin, platelet count, white blood cell differential count, prothrombin time (PT), partial prothrombin time (aPTT), amount of blood loss, transfusion, urine output and intravenous fluid input