Carotid Doppler Scan

The term vascular refers to the blood vessels. Therefore, vascular ultrasound imaging refers to the examination of the body’s circulatory system. This scan studies the speed and volume of blood flow using the Doppler phenomenon.

Strokes secondary to atherosclerotic disease is a major concern. Blood restriction to the brain by a flow limiting narrowing caused by atherosclerotic disease involving the extra cranial carotid arteries is implicated in approximately 20% to 30% of strokes. Possibly 80% of strokes are thromboembolic (blood clot) in origin often with carotid plaque as the source. A carotid ultrasound is the most non-invasive and cost effective screening modality to assess and diagnose suspected extra cranial carotid artery disease.

Areas to be examined are as follows:

Common carotid artery
Internal carotid artery
External carotid artery
Vertebral artery
Subclavian artery if indicated

The patient lies on an examination table with the head slightly elevated. The sonographer applies warm gel to the neck area on both the right and left side. The transducer or ultrasound probe is moved around so that images can be taken of the arteries. You will hear the sound of the blood flowing as the sonographer takes measurements of the blood flow. A full report of all the images and measurements taken will be sent to your doctor so the results can be discussed in depth with you at a time convenient for you and your doctor.

Note: Be prepared to spend at least 30 to 60 minutes at the clinic for this test. It depends on whether one or both extremities are being assessed.

Carotid Doppler Scan FAQs

Do I need an appointment?

Yes, ultrasound exams do need an appointment. If you cannot attend your appointment we appreciate it if you can give 24 hours notice.

Do I need a referral letter from my GP to book a Carotid Doppler Scan?

Not always. Often you can attend without a GP referral; however, depending on the ultrasound scan requested, we may require a referral from your GP to ensure the correct ultrasound examination is performed.

What is the preparation for a carotid doppler scan?

There is no preparation for this exam however wearing a shirt or top where the neck is exposed or easily uncovered is preferable. You may be asked to remove necklaces or other jewelry if in the area that is being evaluated.

What organs are viewed in the carotid doppler scan?

During this examination, we evaluate common carotid, internal carotid, external carotid and vertebral arteries on the left and right side.

What can a carotid doppler ultrasound see?

The carotid ultrasound can identify and measure the amount of plaque in the arteries in the neck

What happens during the carotid doppler scan?

A transducer/camera is placed on the neck and the sonographer will scan the area of concern. During the exam you may hear a noise like a heartbeat, this is the pulse or blood flow within the neck.

How long will the exam take?

The scheduled time for this exam is 30 minutes.

Who will report my exam?

After the sonographer has completed your exam the images will be sent to a consultant radiologist who will report your scan.

When will I receive my results?

Please note that Sonographers are not permitted to provide verbal results during or after the exam. After the ultrasound images have been thoroughly reviewed by our Consultant Radiologist, the official report will be issued and made available to you and/or your GP, usually within 24-48 hours. We are committed to ensuring the accuracy and reliability of your results and appreciate your understanding and patience.

Contact info

Page heading