Abdominal Ultrasound Flashcards

1
Q

How does the normal aortic doppler signal appear superior and inferior to the renal arteries?

A

monophasic/biphasic flow

triphasic flow

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2
Q

What are normal size measurements of the visceral vessels?

A
aorta 2-2.5
celiac 0.7
SMA 0.6
IMA 0.3
Renal 0.4-0.5
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3
Q

What is normal length of the kidneys?
what is the normal size of the parenchyma?
which kidney is usually bigger?

A

> 9cm >13 large
1 cm
L>R

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4
Q

What are velocities for aorta and renals?

A

aorta 60-120cm/s

renal artery 160-180

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5
Q

What criteria suggest stenosis in the renal artery?

A

RA/Aorta velocity (RAR)> 3.5 suggest >60% stenosis

need to correct for angle

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6
Q

What doppler criteria suggest RAS?

A

Main renal artery: RAR >3.5
dampening of doppler waveform in segmental arteries
acceleration index 70m/s

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7
Q

What are the RAS criteria?

A

% stenosis RAR PSV PSturbu
N 180 no
>60% >3.5 >180 yes
occluded N/A N/A N/A

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8
Q

What indicates portal hypertension?

A
MPV >13mm
absent variation in portal/splenic vein
deminished portal flow
hepato-fugal flow
varices
ascites/splenomeg
PVobstruction
turbulent hepatic artery flow
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9
Q

How do you know if a TIPS is malfunctioning?

A

no flow
shunt PSV 190 cm/s
change in shunt PSV by decrease of >40cm.s or increase in >60cm/s
MPV PSV <30cm/s
reversal of flow in hepatic veins
hepatopedal intrahepatic portal venous flow

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10
Q

what is the resistive index? and waht is abnormal?

A

RI=PSV-EDV/PSV

0.6 (with 0.7 upper limit of normal)

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11
Q

what is abnormal MPV size?

A

> 13mm

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12
Q

what is abnormal spleen size?

A

> 15mm

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