Figure 13a. Double-balloon catheterization for the treatment of type C gastric varices. (a) Drawing illustrates the double-balloon technique. (b) Balloon-occluded venogram shows that the gastrocaval shunt is contiguous with the gastrorenal shunt and other draining veins. (c) Fluoroscopic image obtained after the injection of EOI with balloon occlusion of both shunts shows sufficient opacification of the varices.