In branched endovascular repair, there is still debate regarding the best Bridging Covered Stent (BCS) to use, namely between Self-Expanding Covered Stent (SECS) and Balloon-Expandable Covered Stent (BECS). The purpose of this study was to assess the primary Target Vascular (TV) patency in patients receiving t-Branch treatment and to pinpoint elements affecting results. Patients treated with the t-Branch between 2014 and 2019 were included in a retrospective research. The primary patency (right renal artery, left renal artery, superior mesenteric artery, celiac trunk) during the follow-up was the endpoint. Every instance of branch instability was evaluated. Using Kaplan-Meier analyses and multivariable regression models, the factors influencing the patency were identified. A total of 2018 TVs, including 1542 SECSs and 476 BECSs, were examined. The first month had no further events, and the CT patency was 99.8% (SE 0.2%). At the 12th month, the SMA patency was 97.8% (SE 1). At the 24th month, the RRA's patency was 96.7% (SE 2). At the sixth month, the LRA's patency was 99% (SE 0.4). The SMA patency was only positively correlated with relining. At the 2 4th and 36th months, the freedom from instability was 62% and 45%, respectively. In either the early or late experience, no discernible difference between the BECSs and SECSs was found. During the short-term follow-up, BCS for the t-Branch branches functioned well in terms of primary patency. The patency was unaffected by the BCS type. Relining could safeguard SMA patency.
