Diagnostic Testing

How long does a carotid ultrasound take

A carotid ultrasound is one of the quicker vascular studies: a technologist applies gel and moves a probe along each side of your neck. There is no preparation, no sedation and no recovery, so the appointment is largely the scan itself.

Quick answer

A carotid ultrasound is one of the quicker vascular studies: a technologist applies gel and moves a probe along each side of your neck. There is no preparation, no sedation and no recovery, so the appointment is largely the scan itself.

Why it is short

Nothing has to be set up on you. There are no electrodes to place, no stimulation to deliver and nothing to wait for. The technologist images each carotid artery in turn, measuring blood flow and looking for narrowing or plaque. The main variable is how easily the vessels are seen, which differs between people and occasionally lengthens the study.

Where it happens

Carotid ultrasound is not among the six studies performed at the CNS offices, because there is no imaging suite here. It is arranged at an imaging centre or hospital vascular laboratory, so the appointment length is set by that facility rather than by this practice. What happens here is the interpretation, with the ordering neurologist reviewing the report against your history.

Afterwards

You can drive yourself, eat normally and return to work immediately, because there is no sedation, injection or contrast in a standard study. The result goes to the neurologist who ordered it and is discussed at a follow-up rather than handed to you as a number, since the same degree of narrowing means different things depending on whether you have had symptoms.

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 long does a carotid ultrasound take

How long does a carotid ultrasound take?
It is one of the quicker vascular studies, and the appointment is largely the scan itself since there is no setup, sedation or recovery. Ask the imaging facility when you book, as they schedule it and can give you an accurate figure. The practice does not publish a figure for a study it does not perform, which is why the facility is the right place to ask.
Is there any preparation?
Very little. Wear something that leaves the neck accessible and avoid a high collar or a necklace over the area. There is no fasting requirement and no medication to stop unless you are told otherwise for a separate reason. Gel is applied to the skin and wipes off afterwards, though it is worth not wearing something you would mind a mark on.
Where is it performed?
At an imaging centre or hospital vascular laboratory rather than at the CNS offices, which have no imaging suite. The report is then reviewed and explained by the neurologist who ordered it. Transcranial Doppler, which examines vessels inside the skull, is performed at both CNS offices and answers a different question.
Can I drive afterwards?
Yes. There is no sedation, injection or contrast in a standard study and no aftereffect, so you can drive yourself and return to normal activity straight away. If the scan was arranged after a stroke or transient ischaemic attack, whether you should be driving at all is a separate and more important question to raise directly with your neurologist rather than infer from the scan result.
Why does it sometimes take longer?
Because how easily the arteries can be imaged varies between people, depending on anatomy and body habitus. A longer study does not indicate that something abnormal has been found. Ask at the time if you are concerned; technologists are generally happy to say whether they are simply having difficulty imaging.

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.