| Summary: | Objective: To analysis the risk factors influencing endoleak following endovascular repair using parallel stent technique for thoracic and abdominal aortic dilation in order to prevent endoleak. Methods: A retrospective analysis was performed on 50 patients with thoracic and abdominal aortic dilation undergoing endovascular repair with parallel stent technique including endoleak group and without endoleak group from January 2011 to March 2018 at Department of Vascular Surgery, Changhai Hospital. The risk factors of endoleak were analyzed. Results: There were 68 parallel stent grafts in this study including 90 chimney stents. Intraoperative angiography found type Ⅰ endoleak in 28 cases (41.2%) and follow up study showed type Ⅰ endoleak in 12 cases (17.6%). There were three factors correlated with endoleak including the ratio of diameter of parallel artery ≥1.44 in vessel, the ratio of diameter of parallel artery ≤1.53 in stent, and parallel between Gore stent and peripheral coated stent according to univariate analysis (P<0.05). Logistic regression analysis showed that the number of parallel stents was an independent factor correlated with endoleak(P<0.05). Conclusions: Diameter matching between parallel stents, the number of parallel stents and stents parallel in vessels or in stent grafts were associated the endoleak of endovascular repair with parallel stent technique for thoracic and abdominal aortic dilatation shown in this study.
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