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Duplex Ultrasound


A duplex ultrasound is a test to see how blood moves through your arteries and veins, and combines Ultrasound with Doppler Ultrasound.

How the Test is Performed

A wand, called a transducer, is moved over the area being tested. This wand sends out the sound waves. A computer measures how the sound waves reflect back, and changes the sound waves into pictures. The Doppler creates a "swishing" sound, which is the sound of your blood moving through the arteries and veins.


You need to stay still during the exam. You may be asked to lie in different body positions, or to take a deep breath and hold it.


Sometimes during a duplex ultrasound of the legs, the health care provider may calculate an ankle-brachial (ABI) index. You will need to wear blood pressure cuffs on your arms and legs for this test.


Why the Test is performed

Duplex ultrasound is a less invasive option to arteriography and venography. A duplex ultrasound can show how blood flows to many parts of the body. It can also tell the width of a blood vessel and reveal any blockages.


A duplex ultrasound can help diagnose the following conditions:

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Tests/Treatments

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A Northside Hospital Physician Practice.
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