VT DVT & Venous Reflux Assessment 3

Question 1

May-Thurner syndrome results in DVT risk due to compression of which vessel?

Accepted Answer

Left common iliac vein by the right common iliac artery

Answer

May-Thurner syndrome occurs when the right common iliac artery compresses the left common iliac vein against the lumbar spine, promoting left iliac DVT.

Question 2

During a lower extremity venous duplex, respiratory phasicity is absent in the common femoral vein. The MOST likely cause is:

Accepted Answer

Proximal obstruction at the iliac or IVC level

Answer

Loss of normal respiratory phasicity in the common femoral vein indicates proximal obstruction, typically at the iliac vein or IVC level.

Question 3

Which statement about perforator vein reflux is CORRECT?

Accepted Answer

Outward flow lasting >0.5 s during calf compression-release indicates incompetence

Answer

Perforator incompetence is defined as outward (superficial-directed) flow exceeding 0.5 seconds during calf compression-release maneuver.

Question 4

A patient presents with unilateral leg swelling, and duplex shows a non-compressible popliteal vein with echogenic content. The vein diameter is reduced compared to contralateral side. This MOST likely represents:

Accepted Answer

Chronic DVT with scarring

Answer

Reduced vein diameter, hyperechoic content, and non-compressibility together indicate chronic DVT with organized thrombus and fibrosis.

Question 5

The normal direction of blood flow in a competent perforating vein is:

Accepted Answer

Superficial to deep during calf muscle contraction

Answer

In healthy perforators, muscle contraction drives flow inward (superficial to deep) toward the deep venous system.

(VT) Vascular Technician Certification Practice Test

(VT) Vascular Technician Certification Practice Test

VT DVT & Venous Reflux Assessment 3