portal venous system Flashcards
(40 cards)
normal size of portal vein
less than 13 mm
what 2 veins form the portal vein
splenic vein and SMV
what is the normal pressure in the portal vein
5-10 mmHg
when does the portal flow rate and diameter increase
with inspiration and after eating
when does portal flow rate diameter decreases
after exercise and in the upright postion
how does the pv coarse in the liver
transversely
if the PV diameter doesnt change with respiration what should you suspect
portal HTN
what is the normal flow in the PV
toward the liver
hepatopetal
what are the 2 branches of the RPV
anterior and poster branch
the splenic vein drains the…
spleen, stomach and pancreas
SMV drains the…
small intestine and proximal colon
what is budd chiari
obstruction of hepatic veins by thrombus or tumor
symptoms of budd chiari
pain, jaundice, ascites, hepatomegaly, Portal HTN
what is budd chiari associated w/?
oral contraceptives, hepatocellur CA, renal CA, adrenal CA
sonographic appearance of budd chiari
HV w/ thick walls
hepatomegaly
caudate lobe hypertrophy
r & l lobe atrophy
ascites
compression of IVC
ascites
Splenomegaly
pv slow flow
air in hepatic veins
can lead to PE
caused by bacterial infection
air in HV on sono
mobile echogenic foci w/ dirty shadowing or ring down
most common cause of portal HTN
cirrhosis
signs of portal HTN on a patient
esophageal varices
recanalized umbilical vein
caput medusa
turtuous vessels around the umbilicus due to portal HTN
what collateras will you see with Portal HTN
umbilical vein
splenorenal
gastrorenal
intestinal
portal HTN sono appearance
shrunken right lobe
enlarged caudate
dilated portal greater than 13 mm
reverse of flow or hepatofugal
SMV > 1 cm in diameter
in what plane is the recanalization of the umbilical vein is best seen
sagital plane left of midline at the left of the ligament of teres
what is cavernous transformation
formation of venous varices at porta hepatis
