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Doppler ultrasound exam of an arm or leg

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Illustrations

Doppler ultrasonography of an extremity
Doppler ultrasonography of an extremity

Definition    Return to top

This test uses ultrasound to examine the blood flow in the major arteries and veins in the arms and legs.

How the Test is Performed    Return to top

The test is done in the ultrasound or radiology department or in a peripheral vascular lab.

To examine the veins:

A water-soluble gel is placed on a handheld device called a transducer, which directs the high-frequency sound waves to the artery or veins being tested.

To examine the arteries:

Blood pressure cuffs may be put around different parts of the body, including the thigh, calf, ankle, and different points along the arm. A paste is applied to the skin over the arteries being examined. Images are created as the transducer is moved over each area.

How to Prepare for the Test    Return to top

You will need to remove clothing from the extremity being examined.

How the Test Will Feel    Return to top

There is little or no discomfort associated with this test.

Why the Test is Performed    Return to top

This test is done as an alternative to arteriography and venography. It may help diagnose a blood clot, venous insufficiency, arterial occlusion (closing), abnormalities in the carotid artery blood flow caused by a narrowing and to evaluate trauma to the arteries. The test may also be used to monitor arterial reconstruction and bypass grafts.

Normal Results    Return to top

What Abnormal Results Mean    Return to top

Additional conditions under which Doppler ultrasound may be performed include the following:

Risks    Return to top

There are no risks specifically associated with this procedure.

Considerations    Return to top

Cigarette smoking may alter the results of this test, because nicotine can cause the arteries in the extremities to constrict.

Quitting smoking significantly lowers the risk of problems with the heart and circulatory system. Most smoking-related deaths are caused by cardiovascular problems, not lung cancer.

Update Date: 8/22/2006

Updated by: Jonathan Gross, M.D., Department of Radiology, Columbia University Medical Center, New York, NY. Review provided by VeriMed Healthcare Network.

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