Which imaging test for DVT uses sound waves?

Which imaging test for DVT uses sound waves?

• A. D-dimer blood test
• B. Venography
• C. Duplex ultrasound
• D. X-ray

Answer: (C)

Using sound waves to visualize a Deep Vein Thrombosis is done with duplex ultrasound. It uses high-frequency sound waves to create real-time images of the veins, and the duplex part adds Doppler to assess blood flow. This combination shows both the vein structure and whether a clot is obstructing flow, making it the most effective, noninvasive, and readily available test for suspected DVT without radiation. By contrast, the D-dimer is a blood test that signals the possibility of clotting but doesn’t confirm a clot’s location, venography uses contrast with X-rays and is more invasive, and X-ray alone isn’t capable of reliably detecting DVT.

Using sound waves to visualize a Deep Vein Thrombosis is done with duplex ultrasound. It uses high-frequency sound waves to create real-time images of the veins, and the duplex part adds Doppler to assess blood flow. This combination shows both the vein structure and whether a clot is obstructing flow, making it the most effective, noninvasive, and readily available test for suspected DVT without radiation. By contrast, the D-dimer is a blood test that signals the possibility of clotting but doesn’t confirm a clot’s location, venography uses contrast with X-rays and is more invasive, and X-ray alone isn’t capable of reliably detecting DVT.