Visceral vascular

Question 1

>= 60% renal artery stenosis

Answer 1

velocity >= 180-200 cm/sec

RAR > 3.5

Question 2

RAR > 3.5

Answer 2

suggests 60% stenosis

Question 3

>= 60% renal artery stenosis

Answer 3

velocity >= 180-200 cm/sec

RAR > 3.5

Question 4

limitations of RAR (renal artery/aorta ratio)

Answer 4

unreliable if aortic velocity > 100 cm/sec or < 40 cm/sec

Question 5

angle for resistive indices

Answer 5

0

Question 6

resistive indices

Answer 6

usually hilar vessels

Question 7

borderline resistive index

Answer 7

0.7-0.79

(higher for renal transplant 0.8)

Question 8

elevated RI in renal transplant

Answer 8

rejection

ATN

nephrotoxic drug effects

renal vein thrombosis

external compression

Question 9

criteria for renal artery stent stenosis

Answer 9

> 280 cm/sec

RAR > 4.5

Question 10

criteria for renal transplant stenosis

Answer 10

> 200 cm/sec with turbulence

renal artery/iliac ratio > 1.8

Question 11

elevated RI in renal transplant

Answer 11

rejection

ATN

nephrotoxic drug effects

renal vein thrombosis

external compression

Question 12

celiac artery velocity

Answer 12

100-120 cm/sec

Question 13

preprandial SMA

Answer 13

triphasic,

pulsatile,

reversal below baseline

Question 14

post prandial SMA

Answer 14

hyperemic,

more diastolic flow,

above baseline

Question 15

Celiac stenosis >70%

Answer 15

PSV > 200 cm/sec,

EDV > 100 cm/sec bruit,

turbulence,

spectral broadening

dampened hepatic and splenic arteries

Question 16

SMA stenosis > 70%

Answer 16

PSV >= 275 cm/sec

EDV > 70 cm/sec

Question 17

median arcuate artery syndrome worsens with

Answer 17

exhalation

Question 18

median arcuate syndrome improves with

Answer 18

inhalation and sitting up

Question 19

measurement portal vein in portal HTN, CHF

Answer 19

> 13 mm though up to 16 mm in inspiration

Question 20

pulsatile portal vein

Answer 20

CHF

Question 21

normal portal vein velocity

Answer 21

18-30 cm/sec -

low resistance

Question 22

hepatic artery velocity

Answer 22

100 cm/sec

low resistance

Question 23

IVC flow patterns

Answer 23

pulsatile near liver phasic near iliac veins

Question 24

TIPS velocity

Answer 24

70-220 cm/sec (NAVIX)

100-190 cm/sec (Size Lozanski)

Question 25

bad TIPS velocity

Answer 25

\< 50 cm/sec \< 33% of baseline drop by 50 cm/sec

Question 26

sign of abnormal TIPS

Answer 26

narrowing focal velocity increase nonpulsatile continuous flow decreased velocity \< 50 drop velocity \> 50 vs baseline absence of flow gradient \> 50 in shunt retrograde flow right portal vein decreased portal vein velocity \< 33% baseline

Question 27

IMA resistance

Answer 27

HIGH

Question 28

median arcuate

Answer 28

diaphragmatic crura celiac artery

Question 29

when obtaining abnormal celiac artery velocity

Answer 29

to exclude median arcuate syndrome, obtain velocity in inspiration

Question 30

nutcracker syndrome

Answer 30

left renal vein thrombosis/compression venous dilation up to 5 times at point of entrapment venous velocities up to 5 times greater than at hilum

Question 31

resistive index

Answer 31

(PSV-EDV) PSV

Question 32

celiac artery occlusion

Answer 32

no flow in celiac retrograde flow in hepatic artery dampened flow in splenic artery

Question 33

celiac stenosis \> 70%

Answer 33

watch for dampened waveforms in hepatic & splenic arteries Doppler bruit distal turbulence spectral broadening

Question 34

renal artery waveforms