RVT Peripheral Venous Testing 5

Question 1

On a lower extremity venous duplex, a patient shows spontaneous flow in the femoral vein but no augmentation with calf compression. What does this most likely indicate?

Accepted Answer

Occlusive thrombus between the probe and compression site

Answer

Absence of augmentation despite visible flow indicates an obstructive lesion between the compression site and the transducer.

Question 2

Which venous segment is best examined with the patient in a prone position during a lower extremity venous exam?

Accepted Answer

Popliteal and tibial veins

Answer

The prone position provides optimal access to the popliteal fossa and calf veins, which are located posteriorly.

Question 3

What does the term 'post-thrombotic syndrome' describe in the context of peripheral venous disease?

Accepted Answer

Chronic venous hypertension and symptoms resulting from prior DVT damage to valves and vein walls

Answer

Post-thrombotic syndrome results from valve destruction and chronic venous hypertension following DVT, causing pain, edema, and skin changes.

Question 4

Which parameter is most useful for evaluating calf vein thrombosis on duplex ultrasound when direct visualization is difficult?

Accepted Answer

Color Doppler filling defects and compressibility at each vein segment

Answer

Systematic color Doppler assessment for flow filling defects combined with compressibility testing at each tibial vein segment is the standard approach.

Question 5

A duplex exam shows a dilated, tortuous vessel in the popliteal fossa with arterial waveform and adjacent venous signal. What is the most likely diagnosis?

Accepted Answer

Popliteal arteriovenous fistula

Answer

An arteriovenous fistula presents with arterialized flow in a dilated venous structure adjacent to the feeding artery.

(RVT) Registered Vascular Technologist Practice Test

(RVT) Registered Vascular Technologist Practice Test

RVT Peripheral Venous Testing 5