Trans-radial approach (TRA) has been used in cardiac and peripheral interventional radiology practices for decades, because of safety and patient comfort. There is interest in TRA in the cerebrovascular field, with potential to replicate benefits over trans-femoral approach. TRA is technically more challenging and has a learning curve, which hinders its use as the first-line approach; however, as more neuro-interventionalists embrace TRA, techniques are being optimized simultaneously for supra-aortic vessel catheterization. This article describes advantages, patient selection, conventional and distal radial access, and detailed techniques of trans-radial catheterization for diagnostic angiography, as well as cerebrovascular interventions and its current limitations.
Keywords: Artery to sheath ratio; Distal radial access; Distal radial approach cerebral angiography; Trans-radial aneurysm treatment; Trans-radial cerebral angiography; Trans-radial mechanical thrombectomy; Trans-radial neurointervention.
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