Diagnostic Testing

How to prepare for a carotid ultrasound

Very little preparation is needed. Wear a top with an open neckline, leave necklaces at home, and eat and take medications as normal. There is no fasting requirement, no sedation and nothing to arrange afterwards. The study is performed at an imaging centre rather than at the CNS offices, which have no imaging suite, so their check-in requirements apply.

Quick answer

Very little preparation is needed. Wear a top with an open neckline, leave necklaces at home, and eat and take medications as normal. There is no fasting requirement, no sedation and nothing to arrange afterwards. The study is performed at an imaging centre rather than at the CNS offices, which have no imaging suite, so their check-in requirements apply.

What to wear, and what to leave off

The probe needs direct contact with the skin along both sides of your neck, so a high collar, polo neck or scarf will need to come off. A top with an open neckline makes the whole thing easier. Leave necklaces at home or be ready to remove them. Gel is applied to the skin and wipes off afterwards, though it is worth not wearing something you would mind a mark on.

Eating, medication and timing

There is no fasting requirement for a standard carotid ultrasound, so eat normally. Take your usual medications, including blood pressure medication, unless you have been specifically told otherwise. It is worth mentioning blood pressure medication when you book, since it can influence measurements, but it is not usually a reason to withhold a dose.

What to bring and what happens next

Bring the request from your neurologist, your insurance details and photo identification. The study is performed at an imaging centre or hospital vascular laboratory rather than at the CNS offices, which have no imaging suite. The report goes back to the neurologist who ordered it, and you discuss what it means at a follow-up rather than being handed a percentage without context.

About this practice

Clinical Neurology Specialists has been physician-owned since 1998, when Leo Germin, M.D., FAANEM founded it. Five board-certified neurologists and four advanced practice providers see patients at the Las Vegas and Henderson offices, each with its own AANEM-accredited electrodiagnostic laboratory.

Clinical Neurology Specialists is an adult outpatient neurology practice for patients 18 and older. The practice performs no surgery and operates no imaging suite, infusion suite or interventional pain programme, and provides no emergency or inpatient care.

MRI, CT, carotid ultrasound and lumbar puncture are not performed at these offices. They are arranged at an imaging centre or hospital, and the report is reviewed with you by the neurologist who ordered it.

Emergency & crisis resources: Clinical Neurology Specialists is not an emergency service. For stroke symptoms, a seizure lasting more than five minutes or any medical emergency, call 911 or go to the nearest emergency room. For a mental health crisis, call or text 988 (Suicide & Crisis Lifeline).

Frequently asked

Questions about how to prepare for a carotid ultrasound

How do I prepare for a carotid ultrasound?
Wear a top with an open neckline, leave necklaces off, and eat and take medications as normal. There is no fasting requirement and no sedation, so no special arrangements are needed for afterwards. A top with an open neckline makes the whole thing easier, since the probe needs direct contact along both sides of the neck.
Do I need to fast?
No, not for a standard carotid ultrasound. Eat normally beforehand. If you have been given different instructions for a combined study of another area, follow those, since some abdominal studies do require fasting. Confirm with the imaging facility when you book if you are unsure, since they set the instructions for the study they are performing.
Should I stop my blood pressure medication?
No, take it as usual unless specifically told otherwise. Mention it when you book, since it can influence the measurements, but withholding a dose is not usually appropriate and carries its own risk. Mentioning it lets the technologist note it on the report, which is more useful than omitting a dose and producing an unrepresentative reading.
What should I bring?
The request from your neurologist, insurance details and photo identification. The study is arranged at an imaging facility rather than at the CNS offices, so their check-in requirements apply. Bring a list of your current medications as well, since it is often asked for at check-in.
Will I get the results the same day?
Generally no. The report goes to the neurologist who ordered it and is discussed with you at a follow-up, because the same degree of narrowing means different things depending on whether you have had symptoms. The technologist performing the scan generally will not interpret it for you, and that is appropriate rather than unhelpful.

Physician-reviewed. Reviewed by the physicians of Clinical Neurology Specialists — board-certified neurologists, AANEM-accredited electrodiagnostic laboratories, physician-owned since 1998. Reviewed 1 August 2026. This article is general education for adults 18 and older and is not a substitute for a consultation.

Next step

Speak to a board-certified neurologist

Adults 18 and older, at the Las Vegas and Henderson offices. Call 702-804-1212 or request an appointment online.