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What is Predominant blood supply to the supraduodenal bile duct is derived from - and explain in detail?
Blood supply of supraduodenal bile duct
1.   Axial blood supply

The blood supply to the supraduodenal bile duct is essentially axial (98%).
The most important of these vessels run along the lateral borders of the bile duct and are called the '3 O'clock' and 9 O'clock arteries.
These, together with other smaller branches and retroportal vessels from a free anastomosis within the wall of the bile duct.
60% of the blood supply occurs from the duodenal (caudal) end of the duct primarily from branches of the retreduodenal artery (Posterior Superior Pancreaticoduodenal Artery).
38% of the blood supply occurs from the hepatic (cephalic) end of the Right Hepatic Artery.

2.   Non-axial blood supply

Non-axial blood supply accounts for only 2% of blood supply to the supraduodenal bile duct.


This non-axial blood supply is derived from branches of the hepatic artery proper as it runs along the common bile duct.