Intrasaccular flow-disruption with the Woven EndoBridge for narrow-necked aneurysms: A safety and feasibility study.

Abstract Objective The Woven EndoBridge (WEB) received FDA approval for endovascular treatment of wide-necked bifurcation aneurysms. We evaluated the feasibility, safety and efficacy of the WEB for the treatment of narrow-necked aneurysms. Methods This multi-center study included 17 narrow-necked aneurysms, defined by a neck width 2. Aneurysm characteristics, treatment strategies, technical success, complications and angiographic outcomes were retrospectively assessed. Results The aneurysms were located at the internal carotid artery in 7 cases, the anterior communicating artery in 4, the middle cerebral artery in 4, and the basilar artery in 2. The median aneurysm size was 7.4 mm with a median neck width of 2.3 mm. The technical success rate was 100%. There were no neurological complications. Angiographic control revealed complete and adequate occlusion in 13/15 (86.7%) and 14/15 (93.3%) after 6 months, respectively, and in 6/7 (85.6%) and 7/7 (100%) after a median of 13 months, respectively. Two aneurysms were retreated with flow-diverters. Conclusions WEB embolization of narrow-necked aneurysms was technically feasible and safe and might be considered as alternative treatment option to conventional coiling in selected cases.