Carotid duplex
Overview
Definition
Carotid duplex is a procedure that uses ultrasound to look for plaques, blood clots, or other blood flow problems in the carotid arteries. The carotid arteries, located in the neck, supply blood to the brain.
Alternative Names
Scan - carotid duplex; Carotid ultrasound
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 your skin. A handheld device called a transducer is placed on the area. The transducer directs high-frequency sound waves to the arteries being tested, while the gel helps transmit the sound. The ultrasound is turned on and images of the carotid arteries and pulse wave forms are obtained.
How to prepare for the test
No preparation is necessary.
How the test will feel
The test is noninvasive and painless.
Why the test is performed
The test checks blood flow in the carotid arteries. It can detect narrowing in the arteries (stenosis), clotting (thrombosis), and other causes of blockage in the carotid arteries.
Normal Values
If the results are normal, there is no turbulence or disruption in the blood flow. The artery is free of any blockage, narrowing, or other problems.
What abnormal results mean
Disturbances in the blood flow indicate atherosclerosis or other conditions.
What the risks are
There are no specific risks related to having this procedure.
Reviewed By: Jonathan Gross, M.D., Department of Radiology, Columbia University Medical Center, New York, NY. Review provided by VeriMed Healthcare Network.
