How many liver segments are there?
eight
Based on Couinaud classification, the liver is divided into eight independent functional segments (Figs. 6 and 7). Each segment has its own portal pedicle consisting of the hepatic arterial branch, portal branch, and the bile duct with a sepa- rate hepatic venous branch that provides outflow (Fig.
How do you memorize the liver segments?
Liver Segments Explained with Mnemonic
- Cantle’s line: run from middle of gall bladder fossa anterior to Inferior venacava posteriorly.
- Left lobe = Segment I-IV (Segment I is separately the caudate lobe)
- Right lobe = Segment V-VIII.
What is Segment 3 of the liver?
Left lobe. Segments II and III lie medial to the falciform ligament with II superior to the portal venous supply and III inferior. Segment IV lies lateral to the falciform ligament and is subdivided into IVa (superior) and IVb (inferior).
What is segment 7 of the liver?
segment 7 (VII) is located above the portal plane to the right of the right hepatic vein. segment 8 (VIII) is located above the portal plane between the middle and right hepatic veins.
How many segments are in the right lobe of the liver?
Eight hepatic segments The four segments of right liver are: V (right anteroinferior); VI (right posteroinferior); VII (right posterosuperior) and VIII (right anterosuperior). The caudate lobe is often called an independent segment.
Where is segment 4 in the liver?
Radiologically, segment 4 is identified as being between the middle hepatic vein (MHV) and the origin of left hepatic vein (4a) superiorly or the umbilical fissure (4b) inferiorly.
How do you identify liver segments on ultrasound?
The imaging of segments is done in eight steps: (1) identify lobes; (2) identify sectors (right and left portal fissures); (3) identify the plane of superior and inferior segments (transverse fissure/liver hilum); (4) identify left sagittal fissure and the liver ligaments; (5) identify caudate lobe (posterior to …
What does a liver ultrasound show?
A liver scan may be done to check for diseases such as liver cancer , hepatitis , or cirrhosis . Lesions such as tumors, abscesses, or cysts of the liver or spleen may be seen on a liver scan.
Is Segment 4 left or right lobe?
Both of the above classifications use the portal vein and hepatic vein branches to define the right and left lobe. In both classifications, segment IV is part of the left hemiliver.
What is Segment 6 of liver?
segment 6 (VI) is located below the portal plane to the right of the right hepatic vein. segment 7 (VII) is located above the portal plane to the right of the right hepatic vein. segment 8 (VIII) is located above the portal plane between the middle and right hepatic veins.
How many segments does the liver have?
The liver holds about one pint (13%) of the body’s blood supply at any given moment. The liver consists of 2 main lobes. Both are made up of 8 segments that consist of 1,000 lobules (small lobes). These lobules are connected to small ducts (tubes) that connect with larger ducts to form the common hepatic duct.
What are the sections of the liver?
Tucked in thumb = Segment I (Caudate Lobe)
Is liver is the largest organ?
Structure. The liver is one of the most versatile and important organs.
How is the liver divided?
Common Hepatic Duct: A tube that carries bile out of the liver.