What are the surgical segments of liver?
What are the surgical segments of liver?
Table 1
| Couinaud Segments | Anatomic Term | Surgical Resection Term |
|---|---|---|
| 2–4 | Left liver | Left hepatectomy |
| 5,8 | Right anterior section/sector | Right anterior sectionectomy/sectorectomy |
| 6,7 | Right posterior section/sector | Right posterior sectionectomy/sectorecomty |
| 4 | Left medial section | Left medial sectionectomy |
What is the name of Couinaud’s segment 8?
right anterior
right anterior (or medial) section: segment 8 above and segment 5 below the portal plane. right posterior (or lateral) section: segment 7 above and segment 6 below the portal plane.
How many segments does Couinaud have?
The Couinaud classification of liver anatomy divides the liver into eight functionally indepedent segments. Each segment has its own vascular inflow, outflow and biliary drainage. In the centre of each segment there is a branch of the portal vein, hepatic artery and bile duct.
How many segments are there in the liver and their names?
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. Three vertical planes and a transverse plane divide the liver into four sectors and eight segments.
What is the Couinaud system?
The Couinaud classification describe the functional liver anatomy (preferred over morphological liver anatomy). In the widely used Couinaud (or “French”) system, the functional lobes are further divided into a total of eight subsegments based on a transverse plane through the bifurcation of the main portal vein.
How many segments are there in the liver?
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….
| Liver segment | |
|---|---|
| Part of | Liver |
| Anatomical terminology |
Is Segment 4 right or left?
Segment IV is the medial segment of the left lobe. Segments II, III, and IV collectively make up the functional left lobe of the liver.
Is there a right and left liver?
Anatomically, the liver is divided into a larger right lobe and a smaller left lobe by the falciform ligament (see the image below). This division, however, is of no use surgically.
What is Couinaud classification?
The Couinaud classification describe the functional liver anatomy (preferred over morphological liver anatomy). The middle hepatic vein also demarcates the true right and left lobes. The right lobe is further divided into an anterior and posterior segment by the right hepatic vein.
What is Segment 3 of the liver?
segments 2 (II) and 3 (III) are to the left of the left hepatic vein and falciform ligament with II superior and III inferior to the portal plane. segment 4 (IV) lies between the left and middle hepatic veins; it is subdivided into 4a (IVa) (superior) and 4b (IVb) (inferior) subsegments.
