Comparison of the effects of Castor single-branch stent and Longuette chimney stent techniques in the treatment of Stanford B type aortic dissection involving the LSA in the acute phase
LIU Juanjuan
ZHANG Yong
REN Chao
ZHANG Xiao
DUAN Yuanjun
Abstract：Objective To compare the effects of Castor single-branch stent(integrated single-branch covered stent delivery system)and Longuette chimney stent(aortic-branch artery covered skirt-type chimney stent system)techniques on aortic remodeling,false lumen thrombosis,and postoperative complications in the treatment of acute Stanford type B aortic dissection(TBAD)involving the left subclavian artery(LSA).Methods A retrospective study was conducted on the clinical data of 73 patients with TBAD involving the LSA in the acute phase who were admitted between June 2022 and June 2024.According to the treatment method,37 patients treated with Longuette chimney stent were assigned to the Longuette group,and 36 patients treated with Castor single-branch stent were assigned to the Castor group.The intraoperative indicators,length of hospital stay,aortic remodeling,false lumen thrombosis at 6 months post-operation,and short-and medium-term complications were compared between the two groups.Results The duration of operation and X-ray fluoroscopy time in the Castor group were longer than those in the Longuette group(P＜0.05).There was no significant difference in intraoperative blood loss and length of hospital stay between Castor group and Longuette group(P＞0.05).There was no significant difference in the increase rate of true lumen volume,the increase in the maximum diameter of the distal true lumen,and the area distal to the stent between the Castor group and the Longuette group at 2 weeks and 6 months after operation(P＞0.05).Compared with those at 2 weeks after operation,the increase rate of true lumen volume,the increase in the maximum diameter of the distal true lumen,and the area distal to the stent were increased in the two groups at 6 months after operation(P＜0.05).There was no significant difference in the rate of false lumen thrombosis between the two groups at 6 months after operation(P＞0.05).The total incidence of recent complications in Castor group[5.56％(2/36)]was lower than that in Longuette group[21.62％(8/37)](P＜0.05).There was no significant difference in the incidence of mid-term complications between the Castor group[2.78％(1/36)]and the Longuette group[8.11％(3/37)](P＞0.05).Conclusion Both Castor single-branch stent and Longuette chimney stent can achieve good efficacy and safety in the treatment of TBAD involving LSA in the acute stage.Both of them have the same effect in promoting aortic remodeling and false lumen thrombosis.However,although Castor single-branch stent technology has longer duration of operation and fluoroscopy time,it has advantages in reducing the risk of short-term complications such as endoleak and stent displacement,showing better early safety.
Keywords：Stanford type B aortic dissectionleft subclavian arteryCastor single-branch stentLonguette chimney stentaortic remodelingfalse lumen thrombosispostoperative complications
Publication Date：2026-01-28
Online Publishing Date：2026-02-05(First online date of this platform, not the publication date of the document)
Pages：7( 34-40 )