Elephant trunk 法とfrozen elephant trunk 法の比較・検討

Twenty-six patients underwent total arch replacement for Stanford type A aortic dissection, including that with elephant trunk technique （ET group, n＝10） or with frozen elephant trunk technique （FET group, n＝16）. We compared preoperative and intraoperative findings, postoperative results and distal aortic arch remodeling between the two groups. In FET group, anesthesia time, operation time, cardiopulmonary bypass time, cardiac arrest time and circulatory arrest time were significantly shorter than ET group. Also, intra-operative blood transfusion amount was significantly smaller than ET group. In FET group, the ratio of true lumen area and thrombosis rate of false lumen at the distal arch level were significantly higher than ET group. Other postoperative results were almost similar between the two groups.