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If your results aren't normal, the meaning will depend on what area of your body was tested and the type of Doppler ultrasound that you had. Talk with your provider about what your results say about your health and need for treatment.

Doppler ultrasound has not been linked to any health harms. It's generally considered safe when trained sonographers use it correctly. Doppler ultrasound doesn't use ionizing radiation like x-rays use, which makes it safer than x-ray. That's why ultrasound is the most widely used medical imaging method for viewing an unborn baby during pregnancy.

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During pregnancy, Doppler ultrasound is used if there are concerns about blood flow between a pregnant person and the unborn baby. It can also check the baby's blood flow.

Doppler ultrasound works by bouncing sound waves off red blood cells flowing through your blood vessels. The ultrasound device measures the echoes that bounce back from the cells. Cells that are moving away from the sound waves make different echoes than cells that are moving closer to the sound waves. This is called the Doppler effect, named after the scientist who discovered it.

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A Doppler ultrasound is often done by a sonographer, a health care professional who has special training to do ultrasound exams. The test may be done in different ways depending on the part of your body that's being examined. Most Doppler ultrasound exams include these general steps:

Doppler ultrasound tests are used to help diagnose problems that affect the flow of blood in many parts of the body, including:

A Doppler ultrasound can also help diagnose blood vessel tumors and problems with the structure of your blood vessels that you were born with.

If your Doppler ultrasound results are normal, it means that the blood vessels that were checked looked healthy. They have no narrowing or blood clots. The blood flow was normal.

Doppler ultrasound can check for blood vessel conditions that affect the amount, speed, and direction of blood flow in different parts of your body. It can help find narrowed arteries, blood clots, and other conditions.

A Doppler ultrasound is a type of ultrasound imaging test that uses sound waves to show how well your blood flows through your blood vessels. It can be used to examine blood flow in many parts of your body, including many of your organs and your neck, arms, and legs.

For certain ultrasound exams, the ultrasound device is placed inside a body opening. Depending on the organs being checked, the device may be placed in the:

You may need a Doppler ultrasound if you have symptoms of abnormal blood flow. Your symptoms will depend on the part of your body that's affected and the cause of abnormal blood flow.

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A Doppler ultrasound can examine your arteries (blood vessels that carry oxygen-rich blood from your heart and lungs to your body) and veins (blood vessels that carry blood from your body back to your heart and lungs to get more oxygen).

Preparations for a Doppler ultrasound depend on what part of your body is being checked. Your health care provider will tell you if you need to prepare and what to do. You may need to:

But in certain cases, ultrasound can affect fluids and tissues in the body. That's why most medical experts recommend using ultrasound only when it's needed to provide important medical information.

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