by Diane Voyatzis, RD
A Doppler ultrasound is a test that can measure blood flow. It uses sound waves that bounce off blood cells.
Reasons for Test
Doppler ultrasound may be used to check blood flow to an area. It may also be needed to check for injuries to blood vessels or assess treatment. Common reasons for use include:
In most cases, there are no complications with this test.
What to Expect
Prior to Test
Your doctor may do the following:
In some cases your doctor may instruct you to:
Description of the Test
You will lie on a table. Your doctor will put a gel on the skin over the area that will be examined. The gel helps the sound waves travel between the machine and your body.
The ultrasound machine has a hand-held device about the size of a bar of soap. The device is pushed against your skin where the gel was applied. The waves from device bounce off blood cells or tissue and echo back to device. The doctor can examines the images during the test. The images can also be saved for later review.
You may be asked to change positions or hold your breath during the exam.
The gel will be cleaned from your body. You will be able to return to normal activities in most cases.
How Long Will It Take?
About 30 minutes to 1 hour
Will It Hurt?
A radiologist will examine the images after the test. Your doctor will let you know the results and talk to you about treatment.
Call Your Doctor
After the test, call your doctor if symptoms become worse.
If you think you have an emergency, call for emergency medical services right away.
American Institute of Ultrasound in Medicine
Radiology Info—Radiologic Society of North America
The College of Family Physicians of Canada
General ultrasound. Radiology Info—Radiologic Society of North America website. Available at: https://www.radiologyinfo.org/en/info.cfm?PG=genus. Accessed January 26, 2021.
Ultrasound imaging. US Food & Drug Administration website. Available at: https://www.fda.gov/Radiation-EmittingProducts/RadiationEmittingProductsandProcedures/MedicalImaging/ucm115357.htm. Accessed January 26, 2021.
Last reviewed November 2020 by EBSCO Medical Review BoardNicole S. Meregian, PA