Question 1
Venous compression is performed in the transverse plane rather than the longitudinal plane primarily because:
Show answer & explanation
Correct answer: D - In longitudinal the probe may slide off the vein, mimicking compressibility
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These 10 free DVT questions are organized by exam domain, so you can see how each part of the POCUS - Lower Extremity Deep Vein Thrombosis (DVT) blueprint is tested. Reveal the answer and explanation under each question.
Venous compression is performed in the transverse plane rather than the longitudinal plane primarily because:
Correct answer: D - In longitudinal the probe may slide off the vein, mimicking compressibility
At the saphenofemoral junction, the transverse 'Mickey Mouse' sign is formed by the common femoral vein together with which two structures?
Correct answer: B - Great saphenous vein and common femoral artery
A resident documents 'superficial femoral vein thrombosis' and elects to withhold anticoagulation, reasoning that superficial venous thrombosis does not require it. This decision reflects:
Correct answer: D - A nomenclature error - this vessel is a deep vein
During a femoral compression sequence, one channel of the femoral vein compresses completely while a second adjacent channel of similar caliber does not compress. This MOST likely represents:
Correct answer: C - Venous duplication with thrombosis of one channel
The primary sonographic criterion for diagnosing a lower extremity deep vein thrombosis is:
Correct answer: C - Failure of the vein walls to fully coapt with compression
During transverse compression of the common femoral vein, the vein does not fully collapse. The accompanying common femoral artery retains its round shape and appears undeformed. The MOST appropriate interpretation is:
Correct answer: C - Insufficient compression pressure - repeat the maneuver
A femoral vein appears completely anechoic with no visible intraluminal material, yet the vein fails to coapt when firm compression is applied and the adjacent artery deforms. The BEST interpretation is:
Correct answer: A - Acute thrombus, which is frequently anechoic
Compared with the contralateral limb, spectral Doppler of the common femoral vein shows a continuous, monophasic waveform without respiratory variation. This finding MOST suggests:
Correct answer: A - Obstruction proximal to the sampling site
A 58-year-old man presents with a swollen, painful left calf. Compression through the femoral and popliteal zones is normal. In the medial popliteal fossa there is an anechoic, well-circumscribed structure with no internal color flow and a tapering tail extending between the semimembranosus tendon and the medial head of gastrocnemius. The MOST likely diagnosis is:
Correct answer: C - Baker's (popliteal) cyst
A 62-year-old woman reports three days of left calf pain and swelling four weeks after hip arthroplasty. Her Wells score is 3. Compression at the femoral and popliteal zones shows complete coaptation at every site. The MOST appropriate next step is:
Correct answer: D - Arrange complete duplex ultrasound or repeat compression in 5-7 days
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