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The [proper hepatic artery], also known as the [hepatic artery proper] is the continuation of the common hepatic artery after the branching of the gastroduodenal artery. The proper hepatic artery is between 1.5 to 2.3 cm in length and close to 5mm in diameter.
It ascends superiorly, anterior to the portal vein and to the left of the common bile duct and hepatic duct. These three structures, arterial, venous, and bliliary, form the portal triad. The portal triad is found between the two layers of the lesser omentum.
The proper hepatic artery ends when it bifurcates giving origin to the left and right hepatic arteries.For more information on anatomical variations of the celiac trunk and the proper hepatic artery click here.
The image shows an anteroinferior view of the liver and stomach, the duodenum and stomach are reflected anteriorly. CT= Celiac trunk, CHA= Common hepatic artery, PHA= Proper hepatic artery, GDA= Gastroduodenal artery
Sources:
1. "Gray's Anatomy"38th British Ed. Churchill Livingstone 1995
2. "Tratado de Anatomia Humana" Testut et Latarjet 8 Ed. 1931 Salvat Editores, Spain
3. "Variations of hepatic artery: anatomical study on cadavers" Sebben, GA et al Rev. Col. Bras. Cir. 40:3 May/June 2013