Alisa
liver has ____ veins
3 -main hepatic -right hepatic -left hepatic
right & left liver lobes are divided into ____ segments
2 segments each (4 segments total)
right lobe is divided into what segments
anterior & posterior
left lobe is divided into what segments
medial & lateral
what separates the liver into different segments/lobes?
the 3 liver veins
which vein separates the liver into medial & lateral left lobes>
left hepatic vein
which vein separates the liver into anterior & posterior right lobes?
right hepatic vein
which vein completely separates the liver into right & left lobes?
middle hepatic vein -also separates right anterior segment from left medial segment
which vein separates the right anterior segment & left medial segment
middle hepatic vein
what does the left hepatic vein separate?
medial & lateral left lobe
what does the right hepatic vein separate?
anterior & posterior right lobe
what does the middle hepatic vein separate?
-right & left lobes -right anterior segment & left medial segment
what separates the caudate lobe from the medial left lobe/segment?
ligamentum venosum
ligamentum venosum is a remnant of
ductus venosus -ductus venosus is open vessel in fetus that shunts blood from umbilical & closes off when born to become ligamentum venosum
main lobar fissure is between
between the gallbladder & the junction of the right & left portal veins
ligamentum teres is a remnant of
the fetal umbilical vein
ligamentum teres appears as
a triangle shape in the left lobe -hyperechoic
portahepatis is aka
portal triad (usually referred to as portahepatis) -is like the hilum of liver containing 3 things
portahepatis contains
3 things -main portal vein -common hepatic duct -proper hepatic artery
portal system is not a part of
aorta, IVC, or venous system it is a system itself
portal vein provides ____% of total blood flow to liver
75%
portal vein gives ___% of oxygen rich blood to liver
60%
blood from portal vein is very nutrient rich (T/F)
true very nutrient rich bc lot of that blood is coming from bowel
portal system is made up of
-splenic vein -IMV (inferior mesenteric vein) -SMV (superior mesenteric vein) -main portal vein ??
splenic vein drains from ________ towards __________
drains from spleen towards pancreas follows underneath border of spleen
IMV & SMV come from ...
bowel bringing back blood w/ oxygen & nutrients
IMV attaches into ___________
splenic vein (don't usually see bc so small)
SMV comes up & meets ____________
splenic vein at portal splenic confluence
what makes the main portal vein?
SMV & splenic vein (portal splenic confluence)
what brings the other 40% of oxygenated blood to liver?
hepatic artery at portahepatis (60% is from portal vein)
hepatomegaly
enlarged liver if greater than 15 cm
what is the first branch off the abdominal aorta?
celiac axis/trunk
what is the second branch off the abdominal aorta?
SMA
what branches off the abdominal aorta after SMA?
left & right renal arteries
IMA & SMA vs IMV & SMV
IMA & SMA: part of aorta
IMV & SMV: part of portal system -most veins drain back into IVC but IMV & SMV drain into & make up the portal system
what comes off the aorta & branches off almost immediately?
celiac axis -can see seagull wings when in trans
what comes off aorta & turns to run parallel w/ the aorta?
SMA
parts of celiac axis
-hepatic artery -splenic artery -left gastric artery (is super small & can't see it)
seagull wings of celiac axis
left side is splenic artery, goes toward spleen right side is hepatic artery, goes towards liver