Name of the Procedure:

Duplex Scan of Extracranial Arteries; Unilateral or Limited Study Common Name(s): Carotid Artery Duplex, Carotid Ultrasound

Summary

A duplex scan of the extracranial arteries is a non-invasive imaging test that uses sound waves to create pictures of the carotid arteries in the neck. This test helps to evaluate the blood flow through these arteries and detect any blockages or abnormalities.

Purpose

The procedure addresses conditions related to carotid artery disease, such as narrowing or blockages which can increase the risk of stroke. The goal is to assess the severity of any arterial disease and guide treatment options.

Indications

• Symptoms like dizziness, sudden vision problems, or transient ischemic attacks (mini-strokes)
• History of stroke or cardiovascular disease
• Risk factors such as high blood pressure, high cholesterol, diabetes, and smoking

Preparation

• No specific fasting or medication adjustments typically required.
• Wear comfortable clothing, as you may need to remove accessories around the neck.
• Inform your healthcare provider of any past medical conditions or medications.

Procedure Description

1. You will lie on an examination table with your neck exposed.
2. A clear gel will be applied to the skin over your carotid arteries.
3. A transducer (small handheld device) will be moved over the area to capture images and measure blood flow.
4. The Doppler function will be used to hear and record the flow of blood through the arteries.
5. The procedure is painless and usually requires no sedation.

Duration

The entire procedure typically takes about 30 to 45 minutes.

Setting

The duplex scan is usually performed in an outpatient clinic, hospital radiology department, or vascular lab.

Personnel

• A trained ultrasound technologist (sonographer) performs the scan.
• A radiologist or vascular surgeon interprets the results.

Risks and Complications

• No significant risks as it is a non-invasive procedure.
• Rarely, slight discomfort from the transducer pressure on the neck.

Benefits

• Provides detailed images of the carotid arteries to detect blockages or narrowing.
• Helps prevent strokes by identifying issues early.
• Results are usually available within a few days, aiding in quick treatment decisions.

Recovery

• No downtime or recovery period needed.
• Normal activities can be resumed immediately.
• Follow-up appointments may be scheduled to discuss results and treatment plan.

Alternatives

• Magnetic Resonance Angiography (MRA) or Computed Tomography Angiography (CTA) for more detailed imaging.
• Conventional angiography, though it is more invasive.
• Pros of alternatives: Can provide more detailed images; cons include higher cost and increased invasiveness.

Patient Experience

• The procedure is generally comfortable.
• You may feel slight pressure from the transducer.
• No pain management is typically required, and you can resume normal activities immediately after the test.