An ultrasound uses reflected sound waves to produce a picture of organs and blood vessels. The sound waves create a picture on a video screen.

Doppler ultrasound is a special kind of ultrasound. It can detect movement of blood through arteries andveins.

Some ultrasound tests are called “duplex.” Duplex means “two parts.” A duplex ultrasound combines the Doppler ultrasound with the more common ultrasound. The combination can help the doctor see more clearly what’s going on.

There are no risks linked to an ultrasound test, and it is safe during pregnancy. It won’t harm the baby
(fetus).

Why is this test done?

You might have a Doppler ultrasound to:

Look for reduced blood flow in major neck arteries. Low blood flow in these arteries can cause a stroke.

Find a blood clot in leg veins, which could be a deep

Find a blockage or a narrowing in the arteries