what plane is this image taken in? arrows are pointing to what vessels?
2 right renal arteries
The portal venous system carries _________ and _________ from the _______ and abdominal organs to the _______ for _________ and _____________
Carries blood and nutrients from the bowel and abdominal organs
to the liver for metabolism and detoxification
The portal venous system includes all …
what is the exception?
Includes all veins that drain blood from the spleen, pancreas,
gallbladder, and gastrointestinal tract,
with the exception of the
lower rectum
What is the location of the portal system?
Main portal vein (MPV)
Main portal vein (MPV)
formed by…
anterior to…
courses….
◦ Formed by SPL V and SMV posterior to the pancreas neck
◦ Anterior to IVC
◦ Courses superior and posterior up to the hilum of the liver
The porta hepatic is located where?
what vessels enter and exit here?
located at hilum of liver
MPV and HA enter here
CBD not only enters but also exits here
What vessels are involved in the portal venous system?
- Superior mesenteric vein
- Splenic vein
- Inferior mesenteric vein
- Main portal vein
- Right portal vein
- Left portal vein
the main portal vein is formed by…
courses…
◦ Formed by union of the splenic vein and superior mesenteric vein
posterior to the neck of the pancreas
◦ Courses superiorly approximately 5-6 cm, then divides into the
intrahepatic right and left branches
Smaller veins also empty into the _________ with considerable
variation as to where they join the portal venous system, including __________, __________, and ____________
Smaller veins also empty into the main portal vein with considerable
variation as to where they join the portal venous system, including
- left and right gastric veins,
- pancreaticoduodenal veins,
- and gastroepiploic veins
◦ Longer and smaller than right
◦ Courses horizontally to the left
◦ Branches medial and lateral
◦ Feeds caudate and left lobe of the liver
◦ Posterior to ligamentum teres
LPV
◦ Branches into anterior and posterior branches
◦ Feeds right lobe of the liver
RPV
LPV
size?
courses?
branches?
feeds?
posterior to?
◦ Longer and smaller than right
◦ Courses horizontally to the left
◦ Branches medial and lateral
◦ Feeds caudate and left lobe of the liver
◦ Posterior to ligamentum teres
RPV
branches?
feeds?
◦ Branches into anterior and posterior branches
◦ Feeds right lobe of the liver
◦ Courses from inferior to superior as it drains the large intestine via
several smaller branches
◦ Joins the splenic vein to form the main portal vein
Superior mesenteric vein
◦ Courses laterally from the spleen and then medially, directly posterior
to the pancreas neck
◦ Joins the superior mesenteric vein to form the main portal vein
Splenic vein
Superior mesenteric vein
courses?
joins?
◦ Courses from inferior to superior as it drains the large intestine via
several smaller branches
◦ Joins the splenic vein to form the main portal vein
splenic vein
courses?
joins?
◦ Courses laterally from the spleen and then medially, directly posterior
to the pancreas neck
◦ Joins the superior mesenteric vein to form the main portal vein
◦ Courses from inferior to superior
◦ Drains the large intestine via several smaller branches
◦ Usually joins the splenic vein but can vary widely as to where it
actually joins the portal venous system
Inferior mesenteric vein
Inferior mesenteric vein
courses?
drains?
usually joins?
◦ Usually joins the splenic vein but can vary widely as to where it
actually joins the portal venous system
Size of Main portal vein
Diameter?
Length before dividing into L and R portal veins
◦ Approximately 13mm in diameter
◦ About 5-6cm long before it divides into right and left
portal veins
Blood is filtered twice, 1st by… and 2nd by….
◦ 1st – by pancreas, spleen, gallbladder and gastrointestinal
tract
◦ 2nd – by liver
Blood drains from liver sinusoids into
HVs then to IVC
blood from the portal veins terminates in
liver sinusoids
INTRAHEPATIC
Within the liver
