Funnel technique for first-line endovascular treatment of an abdominal aortic aneurysm with an ectatic proximal neck.

Purpose: To describe a novel endovascular technique for proximal stent-graft fixation in an abdominal aortic aneurysm (AAA) with an ectatic aortic neck.

Case Report: An 84-year-old man with multiple comorbidities and an asymptomatic 7-cm infrarenal AAA with a 38-mm aortic neck diameter was treated with a 3-component Talent-LPS stent-graft system. After the left internal iliac artery was embolized with coils, a 34 x 16 x 170-mm Talent bifurcated stent-graft was placed in the lower part of the AAA. A 44-mm-diameter, 90-mm-long free-flow thoracic tube endograft (6-mm oversizing) was delivered to the proximal neck through the bifurcated device and deployed with at least 30 mm of overlap, leaving more than 40 mm extending into the infrarenal aorta to ensure expansion to its nominal diameter as well as an adequate seal. An iliac extension was deployed into the left external iliac artery, and 2 sequential iliac extensions were inserted from the bifurcated stent-graft limb to the right common iliac artery in a bell-bottom configuration. Serial computed tomographic angiograms at up to 18 months have documented the intact 3-component stent-graft, with no endoleak or migration and no increase in aneurysm sac diameter.

Conclusion: This case illustrates the feasibility of placing a straight thoracic endograft as a proximal extension of a bifurcated aortic endograft into a dilated proximal aortic neck. This endograft configuration appears secure and effective, with no type I endoleak or migration over a midterm follow-up.