RVT Abdominal Vascular Duplex Exams 3

Question 1

On abdominal duplex exam, a tardus-parvus waveform in the intrarenal arteries is characterized by:

Accepted Answer

Prolonged systolic acceleration time and reduced peak systolic velocity

Answer

Tardus-parvus describes a dampened, delayed waveform with prolonged acceleration time (>70–100 ms) and low amplitude caused by a proximal obstruction.

Question 2

During mesenteric duplex imaging, the inferior mesenteric artery (IMA) is best evaluated in which patient position and window?

Accepted Answer

Supine, anterior midline transabdominal approach at the level of L3-L4

Answer

The IMA originates from the anterior aortic wall at approximately L3-L4 and is best accessed from the anterior midline in a supine patient.

Question 3

Which duplex finding best differentiates a true aortic aneurysm from a pseudoaneurysm of the aorta?

Accepted Answer

A true aneurysm involves all three vessel wall layers with fusiform or saccular dilation, while a pseudoaneurysm has no true wall

Answer

A true aneurysm is defined by full-thickness wall involvement, while a pseudoaneurysm is a contained rupture with a fibrous capsule rather than a true vascular wall.

Question 4

In a patient with an infrarenal AAA being followed by duplex surveillance, which measurement is the standard for monitoring aneurysm growth?

Accepted Answer

Maximum outer-wall-to-outer-wall anteroposterior diameter

Answer

The maximum outer-wall AP diameter is the standard measurement for AAA surveillance, as it captures the true risk of rupture regardless of thrombus.

Question 5

When assessing the portal vein by duplex, which finding is most consistent with portal hypertension?

Accepted Answer

Hepatofugal flow reversal in the main portal vein

Answer

Hepatofugal (away from the liver) flow reversal in the main portal vein is a hallmark finding of significant portal hypertension.

(RVT) Registered Vascular Technologist Practice Test

(RVT) Registered Vascular Technologist Practice Test

RVT Abdominal Vascular Duplex Exams 3