So we spoke about functional lobes and liver segments
and why these are particularly important.
Well, on here again, we can see we’ve got the right lobe,
we’ve got the left lobe, we’ve got the caudate lobe,
and we’ve got the quadrate lobe and these are our anatomical lobes.
So we can see separated by fissures.
But within these anatomical lobes,
we can actually see two functional lobes based on the blood supply,
based on the branching of the hepatic arteries.
Now, we can roughly say that the two functional lobes,
the left functional lobe and the right functional lobe
equate to the left anatomical lobe, the caudate and the quadrate.
They together formed the left functional lobe.
And the right anatomical lobe can pretty much be the right functional lobe.
So these two functional lobes where we see the left hepatic artery
and the right hepatic artery.
They’ll also receive the branch from the hepatic portal vein.
Within each of these functional lobes,
the whole liver is then divided into eight hepatic segments.
And we have eight hepatic segments.
Each of these individual segments will receive its own branch
from the respective hepatic artery, will receive its own branch
from the respective hepatic portal vein,
and each of the segments well have its own
biliary and venous drainage.
So essentially, each of these hepatic segments can work in isolation.
These has big repercussions when you’re talking about
segmentectomy or lobectomy, during liver surgery.
When portions of the liver can be removed,
knowing that that part of the liver that’s remaining
has an adequate blood supply by the portal vein, hepatic artery,
and adequate venous biliary drainage.
So the factory of anatomical lobes and we have these functional lobes
and hepatic segments is really important for liver surgery.