RVT Abdominal Vascular Duplex Exams 2

Question 1

Which Doppler waveform characteristic is most consistent with significant celiac artery stenosis?

Accepted Answer

Increased peak systolic velocity with post-stenotic turbulence

Answer

Monophasic low-resistance waveform throughout

Answer

Absent diastolic flow with high pulsatility

Answer

Bidirectional flow at the level of the stenosis

Question 2

During an abdominal aortic duplex exam, the normal infrarenal aorta diameter in an adult male should be less than:

Accepted Answer

3.0 cm

Answer

2.0 cm

Answer

4.0 cm

Answer

1.5 cm

Question 3

A patient presents with postprandial abdominal pain and weight loss. Duplex imaging shows elevated PSV in the superior mesenteric artery. Which additional finding would confirm hemodynamically significant SMA stenosis?

Accepted Answer

PSV greater than 275 cm/s

Answer

EDV less than 10 cm/s

Answer

Resistive index above 0.90

Answer

Retrograde flow in the hepatic artery

Question 4

When performing a renal artery duplex exam, the renal-to-aortic ratio (RAR) is calculated using which measurement?

Accepted Answer

Renal artery PSV divided by aortic PSV

Answer

Renal artery EDV divided by aortic EDV

Answer

Renal artery diameter divided by aortic diameter

Answer

Renal parenchymal velocity divided by renal artery PSV

Question 5

In abdominal duplex scanning, the 'median arcuate ligament syndrome' most commonly affects which vessel?

Accepted Answer

Celiac artery

Answer

Superior mesenteric artery

Answer

Inferior mesenteric artery

Answer

Right renal artery

Question 6

Which finding on renal duplex ultrasound is most indicative of renal artery occlusion rather than severe stenosis?

Accepted Answer

Absence of Doppler signal in the main renal artery with a tardus-parvus waveform in the parenchyma

Answer

Elevated PSV greater than 400 cm/s in the main renal artery

Answer

RAR greater than 3.5 with aliasing artifact

Answer

Reversed diastolic flow in the interlobar arteries

Question 7

What does a resistive index (RI) greater than 0.80 in the renal parenchymal vessels suggest when evaluating for renovascular hypertension?

Accepted Answer

Intrinsic renal parenchymal disease that may limit benefit from revascularization

Answer

High-grade renal artery stenosis requiring urgent intervention

Answer

Normal renal vascular resistance in an elderly patient

Answer

Acute renal vein thrombosis