Bile Duct Measured at the origin of the right hepatic artery the bile duct at the porta should measure no larger than 5mm. size of the bile duct length 7.5 cms diameter 5mm Extrahepatic Bile Ductkey words bile duct CBD portal vein right hepatic artery common bile duct common hepatic duct extrahepatic pancreas normal size position anatomy USscan Ashley Davidoff MD TheCommonVein.net 47019 Extrahepatic Bile Ductkey words bile duct CBD portal vein right hepatic artery common bile duct common hepatic duct extrahepatic pancreas normal size position anatomy USscanAshley Davidoff MD TheCommonVein.net 47020