目的: 分析胸腹主动脉扩张性病变,采用平行支架技术（烟囱支架技术）腔内隔绝术后发生内漏的危险因素,为预防发生提供数据。方法: 回顾性分析长海医院血管外科2011年1月至2018年3月胸腹主动脉扩张性病变平行支架技术腔内隔绝术病人50例,分为内漏组和无内漏组,分析内漏的危险因素。结果: 本研究共有平行支架部位68个,其中烟囱支架数目90枚。术中造影发现Ⅰ型内漏28个（41.2%）,随访发现Ⅰ型内漏12个（17.6%）。单因素分析发现,血管内平行动脉口径比值≥1.44,支架内平行动脉口径比值≤1.53,Gore主体支架与外周覆膜支架平行,这3个因素是内漏的相关因素（P<0.05）。Logistic回归分析显示,平行支架数目是内漏发生的相关因素（P<0.05）。结论: 本研究发现胸腹主动脉扩张性疾病平行支架腔内隔绝术的内漏与平行支架间口径匹配、平行支架数目,及平行支架在血管内平行还是支架内平行有关。

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.