[Patterns causing hepatic arterial inner wall injury by catheter insertion-from a case in which catheter probe patency was confirmed 65 months after implant].

We experienced a case in which the hepatic artery catheter system could be used long term. Even after 5 years and five months, there was no damage to the hepatic artery, and we could still use this system. For insertion of the catheter, a fine catheter with the tip tapered at 2.7 F was selected. This catheter was inserted into the hepatic artery peripheral branch in the liver, after a side hole was created 11 cm from the tip, and the side hole was adjusted to stay in the common hepatic artery. We speculated that the reason for little injury to the hepatic artery was use of a fine catheter despite possible damage to the hepatic artery wall like saw cutting in this case. We classified the patterns according to which a catheter damaged the inner wall of the hepatic artery into 5: "straight punch type", "hook punch type", "whiplash type", "elbow blow type", "and saw type".