Predominant blood supply to the Supra duodenal bile duct is derived from

Vascular supply of biliary tract The Supra duodenal and infrahilar bile duct are Predominantly supplied by two axial vessels that run in a 3- and 9-'o clock position These vessels are derived from the superior pancreaticoduodenal, right hepatic, cystic, gastroduodenal and retro duodenal aeries It has been estimated that only 2% of the aerial supply to this poion of the bile duct is segmental and arises directly off of the proper hepatic aery The bile duct and its bifurcation in the hilum derive their aerial supply from a rich network of multiple small branches from surrounding vessels Retro pancreatic bile duct derives its aerial supply from the retroduoden aery Venous drainage of the bile duct parallels the aerial supply and drains into the poal venous system The venous drainage of the gallbladder empties into the veins that drain the bile duct and doesnot flow directly to the poal vein Ref: Sabiston 20th edition Pgno : 1482-1483