IFT03 - Effectiveness of a stent system based on “PETTICOAT” technique in distal aortic remodeling for type B aortic dissection - a “Matching” comparative study.

Objectives: This study aimed to compare the aortic remodeling of distal aorta after the traditional thoracic endovascular aortic repair (TEVAR) with the “Fabulous” stent system repair, a new two-stage stent system based on the PETTICOAT technique.

Methods: The prospective data collected between December 2017 and October 2019 from 134 patients with type B aortic dissection (TBAD) who underwent treatment with the "Fabulous" stent system, as well as data from 159 TBAD patients who underwent standard TEVAR from corresponding multicenter. By using propensity score matching analysis, we compared the incidence of complications and aortic remodeling outcomes in patients undergoing Fabulous stent system and standard TEVAR treatments during a 1-year postoperative follow-up.

Results: By using propensity score matching analysis, 62 patients in Fabulous group and 62 patients in standard TEVAR were included in the analysis, there were no significant statistical differences in baseline characteristics (Table1). In terms of aortic remodeling in bare stent region, Fabulous group had better change trends of true lumen and false lumen than those in the standard TEVAR group (9.6±7.4mm vs. 5.2±7.2mm, P=0.001, minimum diameter changes of true lumen; -19.1±15.1mm vs. -5.5±13.2mm, P < 0.001, maximum diameter changes of false lumen), and rate of false lumen thrombosis was also better in the Fabulous group (62.9% vs. 37.1%,P=0.042) (Table 2 and Fig 1).

Conclusions: Through propensity score matching analysis, the Fabulous stent system, when compared to standard TEVAR surgery, demonstrates good aortic remodeling outcomes in the distal aorta without increasing the incidence of complications.