Flashcards in Abdominal Ultrasound Deck (12):
How does the normal aortic doppler signal appear superior and inferior to the renal arteries?
What are normal size measurements of the visceral vessels?
What is normal length of the kidneys?
what is the normal size of the parenchyma?
which kidney is usually bigger?
>9cm >13 large
What are velocities for aorta and renals?
renal artery 160-180
What criteria suggest stenosis in the renal artery?
RA/Aorta velocity (RAR)> 3.5 suggest >60% stenosis
need to correct for angle
What doppler criteria suggest RAS?
Main renal artery: RAR >3.5
dampening of doppler waveform in segmental arteries
acceleration index 70m/s
What are the RAS criteria?
% stenosis RAR PSV PSturbu
N 180 no
>60% >3.5 >180 yes
occluded N/A N/A N/A
What indicates portal hypertension?
absent variation in portal/splenic vein
deminished portal flow
turbulent hepatic artery flow
How do you know if a TIPS is malfunctioning?
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
what is the resistive index? and waht is abnormal?
0.6 (with 0.7 upper limit of normal)
what is abnormal MPV size?