[Effects of tranexamic acid on the blood conservation and the long-term prognosis in pediatric patients undergoing repair for tetralogy of fallot].

Objective: To evaluate the perioperative tranexamic acid (TXA) on blood conservation in pediatric patients undergoing complete repair for tetralogy of fallot (TOF) and its impact on short-term or long-term adverse event and mortality. Methods: The study was a retrospective cohort study. From January 2009 to December 2010, 386 consecutive patients aged from 31 days to 8 years old, ASA physical status Ⅱ or Ⅲ, receiving primary complete repair for TOF in Fuwai Hospital were enrolled in the study. They were divided into two groups: the control group (n=161) and the TXA group (n=225), according to whether TXA was used during the operation. Patients and their families were followed up by telephone in the 8th-year after surgery. The amount of perioperative blood loss, allogeneic transfusion, short-term or long-term adverse event and mortality were recorded and analyzed. Results: The patients in the TXA group were associated with significant decreased 12 h and total postoperative blood loss compared with the control group [(7.8±0.3) ml/kg vs (8.8±0.3) ml/kg, t=2.412, P<0.05; and (14.0±0.6) ml/kg vs (17.0±0.7) ml/kg, t=3.141, P<0.05]. There were no significant differences in both the volume and incidence of red blood cell, plasma, and platelet transfusion, postoperatively (P>0.05). There were no significant differences in the incidence of reoperation for bleeding and prolonged mechanical ventilation, ICU stay, postoperative hospital length of stay, the short-term and long-term incidence of seizure, stroke, renal failure, deep venous thrombosis, pulmonary embolism and death between the two groups(P>0.05). Conclusion: TXA can decrease postoperative blood loss, but has little impact on the allogeneic blood transfusion, as well as the short-term or long-term adverse event and mortality in pediatric patients undergoing complete repair for TOF.