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. 2004 Feb;25(2):329–332.

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Fig 1. — Nondetachable silicone balloon catheter is positioned within the common carotid artery, over the origin of the APA.

Left, Balloon catheter (arrow) and microcatheter (arrowhead) positioning for clot injection seen on anteroposterior projection. The catheters are advanced side-by-side to the level of the origin of the APA. (The APA is the anatomic correlate of the internal carotid artery in humans.)

Right, Microcatheter (arrowhead) is then advanced into proximal APA, just distal to origin of superior thyroid artery. The balloon (arrow) is then inflated within the carotid artery to occlude the origin of the APA.