Drill Turn Technique for Enhanced Visualization of Wide-Neck Bifurcation Aneurysms in Y-stent-assisted Coiling with LVIS EVO Stents: Technical Considerations and Mid-Term Results

Crossing Y-stent-assisted coiling (CYSAC) is a feasible yet technically challenging technique for the treatment of wide-neck bifurcation aneurysms (WNBAs). To present mid-term results of Y-stent-assisted coiling (YSAC) using the LVIS EVO stent and to describe our “drill turn” technique for stent crossing. This retrospective, observational study included 37 consecutive patients treated with YSAC using LVIS EVO stents at five centres between September 2020 and March 2023. Immediately after treatment, 31 of the 37 patients (83.8