Duplex Ultrasound

Non-invasive arterial and venous duplex studies can detect the presence, location, and severity of arterial and venous vascular diseases. These are simple, cost-effective and painless procedures performed using Doppler ultrasound techniques and no surgery, X-rays, or no needles are used.

Duplex ultrasound uses sound waves to detect how blood flows through the blood vessels and to reveal any blockages. Duplex ultrasound combines traditional ultrasound with Doppler ultrasound. Regular ultrasound uses high-frequency sound waves to create images of organs within the body, while Doppler ultrasound uses sound waves to evaluate blood as it flows through a blood vessel.



During the procedure, you are asked to lie down on a table, a gel is applied to help transmit the sound waves and a handheld device called a transducer is gently moved on the area to be examined. As the transducer moves, the signals are transmitted to the computer that changes the sound waves into images. During the test, you may hear a “swishing” sound, which is the sound of the blood moving through the body.

With a venous study, you will also be asked to stand and your calf may be squeezed to assess the direction of blood flow in your veins.

A duplex ultrasound can help diagnose the following conditions:

  • Peripheral Arterial Disease: Peripheral arterial disease (PAD) refers to narrowing of the blood vessels that obstructs blood flow to the arms or legs, usually due to atherosclerosis (fatty plaques in walls of blood vessels) or other diseases.

  • Deep Venous Thrombosis: Deep venous thrombosis (DVT) refers to a condition in which a blood clot is formed in a vein and the clot can move through the blood stream to the lungs.

  • Chronic Venous Insufficiency: Chronic Venous Insufficiency (CVI) refers to a situation where the valves in the superficial veins malfunction and are “leaky” leading to incorrect flow of blood in the downward direction of gravity.

To discuss Duplex ultrasound or book in an appointment with Dr. Luke Matar, fill out our online form here.


  • University of Melbourne