[Effect of ulinastatin on perioperative glycocalyx and lung function in patients undergoing mitral valve replacement surgery].

OBJECTIVE: To explore the effect of ulinastatin on perioperative glycocalyx and lung function in patients undergoing mitral valve replacement surgery. Methods: Fourty patients, undergoing mitral valve replacement, were randomly allocated into a control group and an ulinastatin group, which were administrated 50 mL normal saline or 2×104 U/kg ulinastatin at the beginning of cardiopulmonary bypass (CPB), respectively. The radical artery blood was collected at 4 time points: After induction of anesthesia (T0), at 10 min after the start of CPB (T1), 1 h after the end of CPB (T2), and 8 h after operation. The concentration of syndecan-1 and TNF-α in blood was measured. Moreover, the blood gas analysis was preformed and the oxygen index (OI) and difference in alveolar arterial oxygen partial pressure (PA-aO2) were calculated at T0, T2, and T3. Results: There were no significant difference between the 2 groups in OI, PA-aO2, and the concentration of syndecan-1 and TNF-α at T0 (P>0.05). The concentration of syndecan-1 and TNF-α was significantly increased at T1 and T2 in the 2 groups, and reached peak at T2. Compared with the control group, the concentration of syndecan-1 and TNF-α was decreased in the ulinastatin group at T1, T2, and T3 (P<0.05). Compared with T0, OI was lower and PA-aO2 was higher at T2 and T3 in both groups, but the 2 indexes were improved in the ulinastatin group compared with those in the control group (P<0.05). Conclusion: Ulinastatin can improve the post-operative pulmonary ventilation function in patients with mitral valve replacement. The mechanism may be associated with the inhibition of TNF-α release and the reduction of glycocalyx shedding induced by ulinastatin.