Transradial versus Transfemoral Access for Intracranial Aneurysm Embolization: A Narrative Review of Safety, Feasibility, and Current Evidence

Endovascular embolization is a cornerstone treatment for intracranial aneurysms, and transfemoral access (TFA) has traditionally been the default vascular route. Transradial access (TRA) is increasingly used in neurointervention because it may reduce clinically important access-site complications, improve postprocedural comfort, and facilitate earlier ambulation. This narrative review aims to summarize direct and indirect evidence comparing TRA and TFA for intracranial aneurysm embolization, with attention to technical feasibility, access conversion, puncture-site complications, neurological events, radiation exposure, procedure duration, recovery, and cost considerations. Direct comparative evidence specific to aneurysm embolization remains limited and is mainly observational; some supporting data come from diagnostic cerebral angiography, mixed therapeutic neurointervention, and cardiovascular access literature. Available data suggest that TRA may be a safe and feasible option for selected patients when performed by experienced operators, particularly when radial anatomy is favorable and the intended device strategy is compatible with upper-extremity access. TFA remains essential for complex anatomy, large-bore device requirements, or insufficient TRA expertise. Access selection should therefore be individualized rather than based on a presumption of universal superiority. Well-designed multicenter studies are needed to define aneurysm-specific outcomes, long-term angiographic durability, patient-reported outcomes, and cost-effectiveness.