- Lobar approach. Place the catheter as selectively as possible in the right or left hepatic artery. Pay attention to identifying the origin of the cystic artery as well as other arteries supplying flow to extra-hepatic organs such as the right gastric artery, para-esophageal or omental vessels among others. If identified, these vessels must be either embolized using coils or avoided by placing the catheter tip well beyond the origin of these vessels. In addition, forward flow into the desired vessel must be maintained as inadvertent administration of even a few DC Beads into these extra-hepatic vessels could have dire consequences.