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Catheterization techniques. (A) Anteroposterior (AP) digital subtraction image demonstrates use of the multipurpose catheter to perform catheterization of the middle hepatic vein. (B) AP digital subtraction venogram demonstrates the use of a reverse curve catheter (Launcher) to gain access in a middle hepatic vein. Catheterization of this vein had been attempted with a multipurpose catheter but had failed.
