Liver vessels

Question 1

purpose of color doppler survey of the portal vein

Answer 1

presence and direction of blood flow in portal vein and its branches

Question 2

hepato petal

Answer 2

flow towards liver

Question 3

hepato fugal

Answer 3

flow away from the liver

Question 4

normal portal vein waveform should be described as

Answer 4

low-velocity continuous flow toward the liver with mild undulations

Question 5

what will increase in portal vein waveform after a meal (post-prandal)

Answer 5

velocity

Question 6

Hepatic blood flow total aprox volume =

Answer 6

1500 mL/min

Question 7

1500 mL/min total hepatic blood flow is broken up between the _________ @ ___% and the _______@___%

Answer 7

proper hepatic artery 25%

portal vein 75%

Question 8

Hepatic blood flow oxygenation is split up between two vessels: ________ @ ____% and _______@____%

Answer 8

proper hepatic artery 50%

portal vein 50% with 85% O2 saturation

Question 9

above what measurement is the PV enlarged?

what does a large diameter suggest?

Answer 9

13mm

portal HTN

Question 10

hepatic veins should demonstrait flow from where to where?

what does normal waveform look like?

Answer 10

from the anterior abd surface blood flow toward the IVC and away from the liver
waveform should be below the baseline showing flow away from the liver

Question 11

Hepatic vein waveform shave been described as ____phasic demonstraiting what (3) physiological processes

Answer 11

triphasic
right atrial filling
contraction
relaxation

Question 12

proper hepatic artery runs __________ to the _________-

Answer 12

parallel to the main portal vein

Question 13

the proper hepatic artery is located _______&________ to the main portal vein

Answer 13

anterior and to the left to the main portal vein

Question 14

bifurcation of the right and left hepatic arteries from proper hepatic artery is seen in ___% of cases

Answer 14

55%

Question 15

right hepatic artery may originate from

Answer 15

proper hepatic artery 55%

superior mesenteric artery 11%

Question 16

if right hepatic artery originates from the superior mesenteric artery it is referred to as _______and is located where

Answer 16

” replaced “

replaced RHA is seen posterior to the head of the pancreas and main portal vein.

Question 17

The left hepatic artery may originate from

Answer 17

proper hepatic artery 55%

left gastric artery 10%

Question 18

if the left hepatic artery originates from the left gastric artery it is referred to as __________

Answer 18

” replaced “

Question 19

doppler waveform discription of normal hepatic arterial flow

Answer 19

low resisitance (continuous flow with diastole)

Question 20

Post -operative liver transplant flow — what does high resistance indicate?
clinically ?
and for the boards ?

Answer 20

(note that it will be high right after transplant and will recieve serial scans )
for the test know :
high resistance WF indicates hepatic venous congestion
transplant rejection

Question 21

define parvus tardus WF

Answer 21

parvus - small systolic amplitude rounding of systolic peak
tardus- prolonged systolic acceleration ie slow upstroke
commonly found downstream from arterial stenosis