Frozen elephant trunk における復元弾性力―Matsui-Kitamura ステント対J Graft Openステントグラフト

Objectives：We examined the spring back force （SBF） in the frozen elephant trunk technique between patients receiving a Matsui-Kitamura stent （M group） or a J Graft Open Stent Graft （J group）. Methods：There were 11 cases in the M group and 10 cases in the J group. For all cases, we performed computed tomography（ CT） scan and measured distal arch angle（ DAA） and stent graft angle （SGA）. Results：There was no difference between groups with regards to patient characteristics. The insertion graft length［155±19 mm （M group） versus 138±17 mm （J group）］was significantly longer in the M group（ p＜0.05）. In the J group, the SGA at 1 and 2 years postoperatively（ 105°±18.5° and 114°±19.1°, respectively） were significantly increased compared to that at 1 month postoperatively （99.9°± 18.7°）. In addition, the SGA in the J group was significantly larger than that in the M group during the postoperative period. Conclusions：The SBF in the J group was thought to be significantly larger than that in the M group. SBF was thought to be associated with the stent frame characteristic.