Journal: Radiology Case Reports
Article Title: Balloon-assisted coil embolization for high-flow renal arteriovenous fistula with inferior vena cava dilatation: A report of two cases
doi: 10.1016/j.radcr.2026.04.046
Figure Lengend Snippet: Case 1: Renal angiography and balloon-assisted coil embolization of a right RAVF (A) Baseline right renal angiogram demonstrating a large high-flow RAVF arising from a focally dilated segment of the right renal artery and draining into markedly dilated venous channels, with poor opacification of the renal parenchyma. (B) Angiogram obtained with the balloon catheter inflated in the right renal artery near the shunt showing disappearance of the arteriovenous shunt and improved cortical enhancement via preserved proximal branches, indicating an optimal level for embolization. (C) Final angiogram after balloon-assisted deployment of detachable coils followed by additional pushable coils within the shunt and proximal draining vein, showing complete occlusion of the fistula with preserved antegrade flow into the normal segmental branches. RAVF, renal arteriovenous fistula.
Article Snippet: Detachable coils (Interlock and EMBOLD coils; Boston Scientific Corporation, Marlborough, MA, USA) were first deployed to create a stable frame, and additional pushable coils (C-STOPPER coils; Piolax Medical Devices, Yokohama, Japan; AZUR D-18 coils; Terumo Corporation, Tokyo, Japan; GALAXY G3 and DELTAFILL 18 coils; Cerenovus, Irvine, CA, USA) were then packed within this framework from the venous side toward the arterial side under balloon occlusion, with the aim of increasing the coil filling rate and achieving dense packing.
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