RT Journal Article SR Electronic T1 CLinical Assessment of WEB device in Ruptured aneurYSms (CLARYS): 12-month angiographic results of a multicenter study JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP neurintsurg-2022-018749 DO 10.1136/neurintsurg-2022-018749 A1 Laurent Spelle A1 Denis Herbreteau A1 Jildaz Caroff A1 Xavier Barreau A1 Jean-Christophe Ferré A1 Jens Fiehler A1 Anne-Christine Januel A1 Vincent Costalat A1 Thomas Liebig A1 Romain Bourcier A1 Markus A Möhlenbruch A1 Joachim Berkefeld A1 Werner Weber A1 Cristian Mihalea A1 Léon Ikka A1 Augustin Ozanne A1 Christophe Cognard A1 Ana Paula Narata A1 Richard Edwige Bibi A1 Jean-Yves Gauvrit A1 Hélène Raoult A1 Stéphane Velasco A1 Jan-Hendrik Buhk A1 Vanessa Chalumeau A1 Maxim Bester A1 Hubert Desal A1 Richard du Mesnil de Rochemont A1 Georg Bohner A1 Sebastian Fischer A1 Sophie Gallas A1 Alessandra Biondi A1 Lamiae Grimaldi A1 Jacques Moret A1 James Byrne A1 Laurent Pierot YR 2022 UL http://jnis.bmj.com/content/early/2022/07/26/neurintsurg-2022-018749.abstract AB Background The CLinical Assessment of WEB device in Ruptured aneurYSms (CLARYS) study has shown that the endovascular treatment of ruptured bifurcation aneurysms with the Woven EndoBridge (WEB) is safe and effective and provides protection against rebleeding at 1 month and 1 year. The 12-month angiographic follow-up is an important endpoint of the study.Methods The CLARYS study is a prospective multicenter study conducted in 13 European centers. The study enrolled 60 patients with 60 ruptured aneurysms of the anterior and posterior circulation. The study was conducted with an independent assessment of safety outcomes and imaging.Results Sixty patients with 60 ruptured bifurcation aneurysms to be treated with the WEB were included. Fifty-three aneurysms (88.3%) had a broad base with a dome to neck ratio <2 (mean 1.6). Of these, 46 patients were evaluated by an independent core laboratory with follow-up imaging performed at 12 months or before eventual retreatment. At 1 year, 19/46 aneurysms (41.3%) were completely occluded (Raymond–Roy grade I), 21/46 (45.7%) had a residual neck and 6/46 (13.0%) had residual aneurysm filling. Adequate occlusion was reported in 40/46 (87%) aneurysms. Six patients underwent target aneurysm retreatment.Conclusions The CLARYS study has previously shown that the use of the WEB in the endovascular treatment of ruptured bifurcation aneurysms provides effective protection against rebleeding with a good safety profile. The angiographic occlusion rates at 1 year reported here are comparable to those already seen in previous multicenter studies which primarily included unruptured aneurysms.Data are available upon reasonable request.