Introduction It is challenging to achieve a durable occlusion in endovascular treatment of aneurysms at the basilar and carotid tip.

eCLIPs is a non-tubular device designed to retain coils and divert flow away from bifurcation aneurysms.

Aim of Study To evaluate the results of eCLIPS treated bifurcation aneurysms.

Methods Between 2015 and 2022 we identified all patients treated with eCLIPS.

Results 39 patients, average age 60 years. 22 patients had planned treatment with the eCLIPS device. Aneurysm characteristics: 30 (77%) basilar tip (BT), 6 (15%) carotid terminus (CT), 3 (8%) anterior communicating (ACA);10 (26%) recurrent after prior treatment; 7 (18%) previously ruptured. eCLIPs implant was successful in 34/39 (87%) of cases. Failure to implant was due to malalignment in 4, microguidewire trauma in 1.

No patient had regression of mRROC score on follow-up imaging.

Safety: Two patients (5.1%) had procedural safety events: 1 thrombus with minor thalamic infarct, mRS 1 at discharge and 1 microguidewire trauma leading to SAH. One patient (5%) required repeat coiling. No subsequent safety events occurred through follow-up.

Conclusion eCLIPs has an effective flowdiversion effect, and it enables durable coilsupport.

Aneurysm occlusion grade remained unchanged or better at all follow-up timepoints.

eCLIPS has a satisfactory safety profile.

Disclosure of Interest no.