Endovascular Repair of Abdominal Aortic Aneurysms With Reverse Taper Neck Anatomy Using the Endurant Stent-Graft: Analysis of Stent-Graft Oversizing

PurposeTo evaluate endovascular repair of infrarenal abdominal aortic aneurysms (AAA) using the Endurant stent-graft and compare the outcomes of patients with different neck anatomies, particularly as pertains to stent-graft oversizing.MethodsA retrospective review was conducted of 75 consecutive patients (69 men; mean age 75 years) undergoing endovascular AAA repair using the Endurant Stent Graft System from December 2008 to September 2011. The mean AAA size was 57± 10 mm (range 51–92), with a mean proximal neck length of 33±10 mm (9–127) and a mean infrarenal neck angulation of 25°±15° (0°–91°). Patients were stratified according to neck anatomy [reverse taper (n=22) vs. inside (n=44) and outside (n=9) the Instructions for Use (IFU) criteria]. Standard safety and efficacy outcome measures were augmented by measurements of the percent oversizing at the proximal and distal neck and volumes of the proximal neck and stent-graft.ResultsTechnical success was 100% in all groups, with no early or late type Ia e...