 The catheter is placed at the junction of the proper and common hepatic arteries, and threaded through the gastroduodenal (mostly), or celiac artery.The catheter is fixed in this position and the pump is placed in a subcutaneous pocket.Finally, to confirm adequate placement and hepatic perfusion, and to rule out extrahepatic perfusion, a dye (fluorescein or methylene blue) is injected into the pump.