The hepatic artery: a reminder of surgical anatomy.

This study was carried out to document the anatomy of the hepatic artery with the purpose of reminding surgeons of the need for this essential knowledge in order to practice safe hepatobiliary surgery. Repeated surgical mistakes on patients referred to our unit prompted the study. One hundred and eighty consecutive livers procured for transplantation was studied, and the anatomy drawn immediately after dissection. The left hepatic artery arose from the left gastric artery in 15%, and either the splenic, gastroduodenal artery or the aorta in 4% of cases. The right hepatic artery arose from the superior mesenteric artery in 15%, the gastroduodenal, right gastric artery or aorta in 10% of cases. There was a major variation of the coeliac axis in 9% of cases studied. Overall, there was an abnormality in 43% of dissections: 48% were multiple and 27% had more than two vascular variations. A constant pattern of abnormalities occurred in the anatomy of the hepatic artery. Realisation of this vascular pattern should make identification of the anatomy easier. When there is one vascular variation, there is a high chance of there being multiple variations.