Introduction The EYMINT e-fellowship was launched in 2020 to foster neurointerventional training and has since enrolled 98 fellows to remotely observe cases by telestreaming. Evaluation identified the fixed allocation of a fellow and mentor as limiting factor to reach a sufficient case load. The program has therefore been modified to expose fellows to all telestreamed cases. It is hypothesized that this increases the cases observed by a fellow and hence the educational outcome.

Aim of Study Assessment of case volume and procedural knowledge improvement per fellow.

Methods Prospective evaluation of telestreamed cases from 02 - 08/2024 via questionnaires.

Results While seasons 1-3 had an average of 166 cases with a fixed fellow-mentor allocation, the current season 4 is based on a non-fixed allocation. A case triggers an alarm to all fellows using a dedicated smartphone app, which then participate on a time-available basis. The proctor (defined as the fellow who is able to directly speak to the treating interventionalist) is being selected on a first-come first-served basis, and channels questions to the treating interventionalist to minimize distraction from the large audience. Interim analysis points to a stable number of transmitted cases (50 within the first 8 weeks), but increased numbers of fellows per case (mean 7.3, SD +/- 4.6, range 0 – 18). Case variety is similar to previous seasons with equal distribution of hemorrhagic and ischemic cases.

Conclusion Tele-observerships may improve from a non-fixed mentoring. Further analysis is needed to clarify if the increased case exposition outweighs the reduced personal mentoring during the training process.

Disclosure of Interest no.