Most Common Arrangement
In the classic arrangement, occurring with a frequency of approximately 70%, a singular cystic artery originates from the geniculate flexure of the right hepatic artery in the upper portion of the hepatobiliary triangle. A site of origin from a more proximal or distal portion of the right hepatic artery is also considered relatively normal.
After separating from the right hepatic artery, the cystic artery travels superiorly to the cystic duct and produces 2 to 4 minor branches, known as Calot’s arteries, that supply part of the cystic duct and cervix of the gallbladder before dividing into the major superficial and deep branches at the superior aspect of the gallbladder neck:
- The superficial branch (or anterior branch) passes sub-seriously over the left aspect of the gallbladder.
- The deep branch (or posterior branch) runs between the gallbladder and gallbladder fossa, terminating at the peritoneum attached to the liver surface.
Read more about this topic: Cystic Artery
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