[The effect of intraoperative high-dose tranexamic acid on blood loss after operation for acute aortic dissection].

The effect of high dose tranexamic acid on blood loss after operations for acute aortic dissection was evaluated. Twenty-eight patients undergoing emergent operations for acute aortic dissection were studied. There were two groups, group T with 13 patients (group T) who were given 7 g of tranexamic acid after induction of anesthesia and 3 g of it after CPB and group C with 15 patients who did not receive tranexamic acid. There was a tendency that group T had less bleeding during operation and after operation (559.6 +/- 865.8 ml in group T and 805.8 +/- 442.9 ml in group C, 1719.2 +/- 1008.7 ml in group T and 3547.7 +/- 4580.1 ml in group C, respectively), but there was no significant difference between two groups. The removal of drainage tubes after operation was significantly earlier in group T (5.0 +/- 2.3 post operative day in group T and 8.1 +/- 5.2 post operative day in group C; p < 0.05). FDP and D-dimer level as measures of fibrinolytic activity were elevated at pre- and postoperative period in both groups, but they tended to be lower in group T at postoperative period. One patient required reexploration because of excessive bleeding and no mediastinal infection was reported in group T, whereas 4 patients underwent reexploration and 2 patients developed mediastinitis in group C. There were 5 hospital death (33.3%) in group C and 2 (15.4%) in group T. High dose of tranexamic acid seems to control fibrinolytic activity, thereby reducing blood loss and requirements, which may contribute to lower morbidity and mortality in operations for acute aortic dissection.