<prompt> Which aery should be saved while operating common bile duct stricture?Common hepatic aeryRight hepatic aeryLeft hepatic aeryCeliac trunk  <response>: Causes of stricture of bile duct - MCC -iatrogenic Vascular injury Choledochotomy incision: longitudinal incision because transverse incision may injure collateral blood supply. Vascular supply or biliary tract Supra duodenal infra hilar bile ducts are predominantly supplied by two axial vessels that run in a 3 and 9-0clock 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. Approximately 60 of the blood supply to the supra duodenal bile duct originates inferiorly from the pancreaticoduodenal and retro duodenal aeries. Whereas 38 of the blood supply originates superiorly from the right hepatic aery and cystic dust aery The blood supply to the common bile duct and common hepatic duct is illustrate: right hepatic aery a; 9:00 aery b; retroduodenal aery c; left hepatic aery d; proper hepatic aery e; 3:00 aery f; common hepatic aery g; gastroduodenal aery h. 