What is the significance of the hepatic segments?

What is the significance of the hepatic segments?

It is the preferred anatomy classification system as it divides the liver into eight independent functional units (termed segments) rather than relying on the traditional morphological description based on the external appearance of the liver.

Where is the hepatic segments?

Hepatic segments (Couinaud classification) The left lobe is divided into the medial and lateral segments by the left hepatic vein. The fissure for the ligamentum teres also separates the medial and lateral segments. The medial segment is also called the quadrate lobe.

How are the segments of the liver divided?

The portal vein divides the liver into upper (2, 4a, 8, 7) and lower (3, 4b, 5, 6) segments, and can usually be identified without IV contrast. A line drawn from the middle of the gallbladder fossa to the IVC (green) roughly divides the liver into left and right lobes.

Where is the hepatic lobe?

It occupies the right hypochondrium, on its posterior surface by the ligamentum venosum for the cranial (upper) half and by the ligamentum teres hepatis (Round ligament of liver) for the caudal (under) half.

How many segments does a liver have?

eight segments
The liver has eight segments, which are referred to by numbers or by names. The numbering of the segments is done in a counterclockwise manner with the liver being viewed from the inferior surface, starting from Segment I (the caudate lobe).

How many segments are in the human liver?

Eight segments
Shape of human liver in animation. Eight segments by Couinaud labelled. A liver segment is one of eight segments of the liver as described in the widely used Couinaud classification (named after Claude Couinaud) in the anatomy of the liver.

What are the hepatic ducts?

A tube that carries bile from the liver. It starts where the right and left hepatic (liver) ducts join outside the liver. It ends where the cystic duct from the gall bladder joins it to form the common bile duct.