VT Abdominal Aorta & Visceral Vessels 3

Question 1

An endoleak after EVAR in which blood flows into the aneurysm sac from lumbar or inferior mesenteric artery branches is classified as:

Accepted Answer

Type II endoleak

Answer

Type II endoleaks arise from retrograde flow into the sac via collateral vessels such as lumbar arteries or the inferior mesenteric artery.

Question 2

In a patient with suspected chronic mesenteric ischemia, which finding would MOST support the diagnosis on duplex ultrasound?

Accepted Answer

Celiac PSV >200 cm/s AND SMA PSV >275 cm/s

Answer

Chronic mesenteric ischemia typically requires stenosis of at least two of the three mesenteric vessels; concurrent elevated PSV in both the celiac (>200 cm/s) and SMA (>275 cm/s) supports the diagnosis.

Question 3

Which portion of the abdominal aorta is most commonly involved by atherosclerosis?

Accepted Answer

Infrarenal aorta

Answer

The infrarenal aorta experiences the greatest degree of atherosclerotic disease due to altered flow patterns, reduced elastic tissue, and hemodynamic stress at the aortic bifurcation.

Question 4

During duplex evaluation of the inferior mesenteric artery (IMA), which finding is considered normal?

Accepted Answer

High-resistance triphasic waveform in the fasting state

Answer

Like the SMA in fasting state, the IMA normally demonstrates a high-resistance triphasic waveform reflecting low metabolic demand of the non-stimulated bowel.

Question 5

A Type I endoleak detected on surveillance ultrasound after EVAR is significant because:

Accepted Answer

It represents perigraft flow at the attachment zones and carries risk of sac pressurization and rupture

Answer

Type I endoleaks arise at the proximal or distal graft attachment zones and directly pressurize the aneurysm sac, requiring prompt reintervention to prevent rupture.

(VT) Vascular Technician Certification Practice Test

(VT) Vascular Technician Certification Practice Test

VT Abdominal Aorta & Visceral Vessels 3