title: Treating patients with abdominal aortic aneurysm with endovascular repair and the crossover chimney technique in the internal iliac artery to protect the unilateral internal iliac artery.
abstract: This study aims to explore the treatment methods for patients with abdominal aortic aneurysms (AAAs) that required occlusion of the openings of the bilateral internal iliac arteries (IIAs) in endovascular aneurysm repair (EVAR) and to evaluate the efficacy of these treatments. Four patients with AAA were treated with endovascular aneurysm repair (EVAR) and the crossover chimney technique in the bilateral internal iliac arteries (IIAs). We inserted and released the abdominal aortic stent as usual and implanted the bypass stent graft simultaneously. The intraoperative immediate angiography showed complete isolation of the AAA and patency of the bypass. One month after surgery, it showed contrast engorgement in the bypass stent in three patients. The IIA on the bypass side and its branches had good developing. Another case in which we utilized a COOK stent, occlusion started at the opening of the bypass stent, with no occurrence of other complications. For patients in whom AAAs involve bilateral iliac arteries and the openings of the bilateral IIAs need to be occluded, EVAR and a crossover chimney technique can protect the unilateral IIA.
authors.affiliation: Department of Interventional, Beijing Anzhen Hospital of Capital Medical University Beijing 100029, China.
authors.forename: Xi
authors.initials: X
authors.lastname: Guo
authors.affiliation: Department of Interventional, Beijing Anzhen Hospital of Capital Medical University Beijing 100029, China.
authors.forename: Peng
authors.initials: P
authors.lastname: Li
authors.affiliation: Department of Interventional, Beijing Anzhen Hospital of Capital Medical University Beijing 100029, China.
authors.forename: Guang-Rui
authors.initials: GR
authors.lastname: Liu
authors.affiliation: Department of Interventional, Beijing Anzhen Hospital of Capital Medical University Beijing 100029, China.
authors.forename: Xiao-Yong
authors.initials: XY
authors.lastname: Huang
authors.affiliation: Department of Interventional, Beijing Anzhen Hospital of Capital Medical University Beijing 100029, China.
authors.forename: Lian-Jun
authors.initials: LJ
authors.lastname: Huang
keywords: Abdominal aortic aneurysm (AAA); crossover chimney technique; endovascular aneurysm repair; iinternal iliac artery (IIA)