Introduction The European EYMINT tele-observership (e-fellowship) was initially launched in 2020 and has since enrolled 72 neurointerventional fellows. These have live remote access to procedures performed by individually assigned specialists (mentors) at geographically distant high volume neurointerventional centers.

Aim of Study 1) Assessment of situational awareness during remote attendance of neurointerventional procedures. 2) Assessment of learning progress among participants.

Methods Prospective evaluation of telestreamed cases from 2020 to 2023 via anonymous questionnaires for trainees and mentors.

Results From 06/2020 to 04/2023 a total of 498 cases were transmitted to fellows using telestream technology (33% Aneurysm, 29% AVM/DAVF, 27% Ischemic Stroke). Although not being physically present, a high level of situational awareness for the procedure (levels 4+5 on a Lickert scale from 1–5) was reported by 81.9% of fellows. The impact of the fellowship on knowledge improvement during neurointerventional training was reported to be large by 55% of participants. Technical knowledge (handling of devices) and procedural knowledge (sequence of interventional steps) were equally described to be the areas of particular improvement. Remote attendance of complex aneurysm cases (intrasaccular devices, flow diversion) seemed to deliver most value in terms of learning progress. Nevertheless, some participants stated more value from a different perspective on a common procedure, i.e. a thrombectomy.

Conclusion Tele-observerships may supplement neurointerventional hands-on training in particular of low-frequency high-complexity procedures.

Disclosure of Interest Matthias Bechstein: Nothing to disclose

Helena Guerreiro: Nothing to disclose

Teresa Nawka: Nothing to disclose

Vladimir Kalousek: Nothing to disclose

Jens Fiehler: Nothing to disclose

Uta Hanning: Nothing to disclose.