Venous Doppler Ultrasound


A venous duplex ultrasound is an ultrasound that uses sound waves to create images of the inside of the body. A venous duplex ultrasound is an ultrasound that looks at the flow of blood through the veins in the legs.

The test may be used for the following reasons:

  1. To investigate the cause of the following symptoms in the leg: pain, swelling, increased warmth and /or bulging veins.
  2. To diagnose the following: blood clot, deep vein thrombosis

Before the exam there is no special preparation required.


During the exam you will be asked to lie on a table. Gel will be placed on the skin of your leg, over the veins being tested. The ultrasound machine has a hand-held instrument called a transducer. The transducer is pushed against your skin where the gel was applied. The transducer sends sound waves into your body. The waves bounce of structures in the body and echo back to the transducer. The echoes are converted to images that are stored and saved for your physician to review.

The length of the exam varies, depending on your situation. In most cases, it will take between 15 to 45 minutes.

Your clothing is removed from the waist down. No dresses preferable to avoid fully undressing. 

Your doctor will notify you of the results and provide you with recommendations.