Introduction Today the use of flow diverter stents are continually expanding. In recent years, off-label use of flow diversion in treatment of intracranial aneurysms beyond internal cerebral artery has become more and more popular.

Aim of Study In this study, we report our centre’s experience of the occlusion outcome with O’Kelly Marotta and Cekirge Saatci classifications in treating bifurcation aneurysms with flow diverter devices, as well as of the safety of the possible intra- and postoperative outcome.

Methods It is a retrospective single-centre study we evaluated patients treated by placing a flow diverter device covering the neck of the aneurysm between January 2019 and May 2022.

Results We had 15 patients in total, 7 males and 8 females; the mean age was 54.6 ± 8.1 years, with a range of 46–68 years. There were seven patients who had anterior cerebral artery distal bifurcation aneurysms, four patients with middle cerebral artery bifurcation aneurysms, three patients with an Acom aneurysm, and one patient with a posterior cerebral artery bifurcation aneurysm. Silk flow diverter was used in eleven patients and, four patients had a treatment with the p48 MW. The average follow-up period was 22 ± 9 months. All aneurysms (10/15, 66%) that were under control for more than a year during follow-up were completely occluded or had stable, altered regional angioarchitecture. Intimal hyperplasia, detected in 33,3% of our patients.

Conclusion Flow diversion has emerged as a valuable technique in the management of bifurcation aneurysms.

Disclosure of Interest no.