[Effect of ulinastatin on thromboxane B2 and deep vein thrombosis in elderly patients after hip joint replacement].

OBJECTIVE: To determine the effect of ulinastatin on plasma thromboxane B(2) and deep vein thrombosis(DVT) in elderly patients after hip joint replacement. METHODS: Eighty ASAI-IIpatients aged 65-81 years undergoing hip joint replacement were randomly divided into 4 groups (n=20): Group U1 (ulinastatin 5 000 U/kg);Group U2 (ulinastatin 10 000 U/kg); Group U3 (ulinastatin 20 000 U/kg); and Group C (the same volume of saline as control).The blood samples were collected at 5 time points: preoperation (T(1)), immediately after the operation (T(2)), 1 d (T(3)), 2 d (T(4)) and 3 d after the operation (T(5)), respectively. Thromboxane B(2) was detected, and DVT was also examined through color Doppler ultrasonography 3 d after the operation. RESULTS: Compared with T(1), the level of thromboxane B(2) significantly increased in Group C at T(2)-5, in Group U1 at T(2-4), in Group U2 and U3 at T(2) (P<0.01). Compared with Group C, the concentration of thromboxane B(2) decreased in Group U1 at T(2-3), in Group U2 and U3 at T(2-4) (P<0.01). Compared with Group U1, thromboxane B(2) significantly decreased in Group U2 and U3 at T(2-4) (P<0.01).The incidence rate of DVT was 40% in Group C, 10% in Group U1. There was no incidence of DVT in the Group U2 and U3 (P>0.05). CONCLUSION: Ulinastatin can inhibit blood thromboxane B(2) level in dose dependent manner and prevent DVT in elderly patients after hip joint replacement.