Introduction There are no specific recommendations in clinical guidelines about the best time, imaging tests, or intervals for following up patients with intracranial aneurysms treated with flow diverters and intrasaccular flow disruptors.

Aim of Study We aimed to propose recommendations and a protocol based on the scientific evidence for using neuroimaging to monitor intracranial aneurysms that have been treated with flow diverters and intrasaccular flow disruptors without coils. We aimed to specify the most appropriate neuroimaging techniques, the interval, the time of follow-up, and the best approach to defining the imaging findings, with the ultimate goal of improving clinical outcomes while optimizing and rationalizing the use of available resources.

Methods Since no completed randomized trials exist, we reviewed the literature and used interim analyses of trials, and meta-analyses of observational and case-control studies to provide recommendations.

Results The recommendations are summarized in the attached figures 1 and 2.

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Abstract P104 Figure 1

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Abstract P104 Figure 2

Conclusion There is a great variability of protocols in each center in the follow-up of intracranial aneurysms that have been treated with flow diverters and intrasaccular flow disruptors. The first control technique after treatment to assess efficacy and stability during the first year will be the Cone-bean CT and DSA, to then move on to the angioRM in long-term control. Doing an DSA again will be indicated when the morphological characteristics change or the degree of closure worsens.

Disclosure of Interest no.