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Carotid duplex

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Carotid stenosis, X-ray of the left artery Carotid stenosis, X-ray of the right artery Carotid duplex

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Carotid duplex

Definition:

Carotid duplex is a procedure that uses ultrasound to look for plaques, blood clots, or other problems with blood flow in the carotid artery walls and lumen (interior). The carotid arteries, located in the neck, supply blood to the brain.

Alternative Names:
Scan - carotid duplex, Carotid ultrasound

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How the test is performed:

The test is done in the peripheral vascular lab or radiology department of a hospital. You are placed on your back and your head will be supported to prevent movement.

A water-soluble gel is placed on the skin where the transducer (a handheld device that directs the high-frequency sound waves to the arteries being tested) is to be placed. The gel helps transmit the sound to the skin surface. The ultrasound is turned on and images of the carotid arteries and pulse wave forms are obtained.

How to prepare for the test:

No special preparation is necessary.

For infants and children:

The preparation you can provide for this test depends on your child's age and experience. For specific information regarding how you can prepare your child, see the following topics:

• Infant test/procedure preparation (birth to 1 year)
• Toddler test/procedure preparation (1 to 3 years)
• Preschooler test/procedure preparation (3 to 6 years)
• Schoolage test/procedure preparation (6 to 12 years)
• Adolescent test/procedure preparation (12 to 18 years)

How the test will feel:

The test is noninvasive and painless.

Why the test is performed:

The test assesses blood flow and is used to detect the conditions involving stenosis (narrowing and hardening), thrombosis (clotting), and other causes of obstruction in the carotid arteries.

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