Which finding would prompt ultrasound imaging for suspected deep vein thrombosis?

• A. Unilateral leg swelling
• B. Recent surgery within 6 months
• C. Chronic venous insufficiency
• D. No swelling but wrist pain

Answer: (B)

Evaluating suspected DVT hinges on how likely a clot is given the patient’s risk factors. Recent surgery within the last six months is a strong trigger for imaging because surgery, along with possible postoperative immobility, creates a setup for venous stasis and a transient hypercoagulable state. That combination raises the probability of a deep vein thrombosis enough to justify a duplex ultrasound to confirm or exclude a clot.

While unilateral leg swelling can point toward a DVT, it can arise from many other causes and isn’t as specific a trigger by itself. Chronic venous insufficiency is a longer-standing condition that can cause leg changes and swelling but doesn’t necessarily indicate an acute DVT. No swelling with wrist pain isn’t related to a DVT in the leg. Ultrasound is the preferred initial test because it’s noninvasive and highly effective at detecting or ruling out a DVT in the leg.