Bifurcated Aortoiliac Endograft Limb Occlusion during Deployment and Its Bailout Conversion Using the External Iliac Artery to Internal Iliac Artery Endograft Technique

Abstract

Endovascular aneurysm repair has become the preferred method to treat abdominal aortic aneurysms (AAAs). The Ovation TriVascular Stent-Graft system introduces a unique concept of separation of the metal (stent) and fabric (graft) portion of the endograft's main body to facilitate delivery through ultra-low profile 14F devices. In the setting of a narrow distal aneurysmal lumen, usually due to the presence of thrombus, deployment of this endograft may be complicated by folding and collapse of the (unsupported by a stent) aortic body or limbs, making catheterization and ballooning impossible. We present a case of Ovation endograft contralateral limb collapse in a tight AAA lumen due to thrombus deposition, which led to folding and total occlusion of the limb and made limb catheterization impossible. This is a real-life example of how the external iliac artery to internal iliac artery endograft technique may be used as a bailout procedure, converting the procedure into an aortouni-iliac graft. To our knowledge, this is the first reported bailout use of this technique in English literature which may be used in selected cases.