Operative terminology and post-operative management approaches applied to hepatic surgery: Trainee perspectives

Figure 1 Couinaud classification of hepatic segmental anatomy. The liver is made up of 8 segments: Segment 1 is the caudate lobe and is closely related in position to the inferior vena cava posteriorly; Segments 1-4 make up the left hemi-liver; Segments 5-8 make up the right hemi-liver. Couinaud divided the liver into functional left and right hemi-livers, and the plane between the two runs in Cantlie’s line. This line runs from the middle of the gallbladder fossa anteriorly to the IVC posteriorly.

Figure 2 Sectorial anatomy of the liver based on the hepatic veins. The liver is divided into a right and left hemi-liver by the middle hepatic vein (lies in Cantlie’s line). The right hemi-liver is divided into anterior and posterior sections by the course of the right hepatic vein; The left hemi-liver is divided into lateral and medial sections by the left hepatic vein.