6. Understand the typical branching pattern of the cystic a. and the boundaries of the hepatobiliary triangle.
The cystic a. typically branches from the right br. of the hepatic a. proper, but it may also arise directly from the hepatic a. proper. Infrequently, the cystic a. arises from other brs. of the celiac trunk. The cystic a. is most easily located within the hepatobiliary triangle - a triangular area with borders of the common hepatic duct, the cystic duct, and the inferior surface of the right lobe of the liver. The hepatobiliary triangle is frequently confused with the triangle of Calot - a triangular area with borders of the common hepatic duct, the cystic duct, and the cystic a.