RVT Peripheral Venous Testing 2

Question 1

Which duplex ultrasound finding is most diagnostic of acute deep vein thrombosis (DVT)?

Accepted Answer

Non-compressibility of the vein lumen

Answer

Non-compressibility of the vein with probe pressure is the primary criterion for diagnosing DVT on duplex ultrasound.

Question 2

When performing a lower extremity venous duplex exam, which vein is typically evaluated at the popliteal fossa?

Accepted Answer

Small saphenous vein and popliteal vein

Answer

The popliteal fossa is the anatomical window where both the popliteal vein and the small saphenous vein are routinely evaluated.

Question 3

A patient presents with a swollen leg and pain. Duplex shows a hyperechoic, non-occlusive thrombus floating freely in the common femoral vein. What is the clinical concern?

Accepted Answer

Free-floating thrombus with high pulmonary embolism risk

Answer

A free-floating thrombus in a major vein carries a significantly elevated risk of dislodgement and pulmonary embolism.

Question 4

Which Doppler waveform characteristic indicates normal venous patency in the common femoral vein?

Accepted Answer

Spontaneous phasic flow varying with respiration

Answer

Normal femoral vein flow is spontaneous, phasic with respiration, and augments with distal compression.

Question 5

During a venous reflux study, what duration of retrograde flow in the great saphenous vein is considered pathological?

Accepted Answer

Greater than 1.0 second

Answer

Reflux duration exceeding 0.5 seconds in superficial veins (and 1.0 second in deep veins) is considered pathological by most accepted criteria.

(RVT) Registered Vascular Technologist Practice Test

(RVT) Registered Vascular Technologist Practice Test

RVT Peripheral Venous Testing 2