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​Carotid Duplex Scans are tests done using a handheld device (transducer) applied to the neck area, where the carotid arteries (the arteries that supply blood to the brain) are located. Sound waves are used to produce a visual image of the artery and to measure the blood flow through the artery. This may be done on one side of the neck, or on both sides. The scan can detect the severity and location of any blockages in these arteries. Your provider uses this information to determine the best course of treatment for you, if any is needed.


  • No special preparation is needed

During the test:

  • The technician will apply the transducer and warm gel to the area to be scanned. The test is painless and takes about 30 minutes to complete

After the test:

  • You may resume your normal activities
  • If you are seeing your provider the same day, they will tell you about the test results at that time
  • If the test is done on a day that you don’t see your provider, the nurse will contact you with information about the results after the provider reviews it, usually 7-10 days.​