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

Significant celiac artery stenosis produces elevated peak systolic velocity at the stenosis with turbulent, disturbed flow distal to the lesion.

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

The normal infrarenal aorta diameter is less than 3.0 cm; a diameter of 3.0 cm or greater defines an abdominal aortic aneurysm.

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

A PSV exceeding 275 cm/s in the SMA is the established threshold for hemodynamically significant stenosis (≥70%).

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

The RAR is calculated by dividing the highest renal artery PSV by the infrarenal aortic PSV; a ratio ≥3.5 indicates significant stenosis.

Question 5

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

Accepted Answer

Celiac artery

Answer

The median arcuate ligament of the diaphragm crosses anteriorly and may compress the celiac artery origin, causing extrinsic stenosis.

(RVT) Registered Vascular Technologist Practice Test

(RVT) Registered Vascular Technologist Practice Test

RVT Abdominal Vascular Duplex Exams 2