Balloon anchoring technique forthrombectomyin hostile craniocervical arterial anatomy

Background Craniocervical catheter access in large vessel occlusion acute ischemic strokes can be challenging in cases of unfavorable aortic arch/cervical vascular anatomy, leading to lower recanalization rates, increased procedural time and worse clinical outcomes. We aim to demonstrate the feasibility of the balloon-anchoring technique (BAT) that can be attempted before switching to alternative access sites. Methods Retrospective review of prospectively collected information on 11 patients in which two variants of the BAT (proximal anchoring: balloon guide catheter (BGC) is inflated to provide support for distal access; distal anchoring: compliant balloon is inflated in an intracranial artery to allow advancement of the support system) were utilized to facilitate craniocervical access due to failure of conventional maneuvers. Results Ten patients had anterior and one patient had posterior circulation large vessel occlusions. Mean age was 81 years and 81% were females. Type 3 arches were found in 82% and a 9 French balloon guide catheter was used in 82%. Proximal anchoring with BGC was used in four cases while distal anchoring was used in seven patients to allow access to the target vessel, avoiding the need to puncture alternative access sites. Successful reperfusion (modified treatment in cerebral ischemia 2b-3) was achieved in all cases and no complications were observed. Conclusion BAT is safe and feasible. It can be considered as a rescue maneuver in order to avoid switching to a different access during thrombectomy in individuals with unfavorable aortic arch/craniocervical anatomy.