Carotid Surgery and Stenting in Singapore

Carotid endarterectomy and carotid artery stenting are procedures intended to reduce stroke risk in selected patients with narrowing of a neck artery supplying the brain. They work differently and carry different risks. Carotid artery disease also requires medical treatment and risk-factor control, whether or not a procedure is recommended. A percentage on a scan is not enough to decide on surgery.

What should I do about new stroke symptoms?

Call 995 in Singapore for sudden face drooping, one-sided weakness or numbness, difficulty speaking or understanding speech, or sudden loss of vision. New loss of balance or coordination can also be serious. Do not drive yourself or wait for a clinic reply. The same urgent action applies if symptoms resolve: a TIA needs emergency assessment. Tell the team when symptoms began or when the person was last known to be well.

Who may benefit from a carotid procedure?

A recent stroke or TIA caused by a relevant carotid narrowing can change both urgency and the likely benefit of treatment. The team needs to establish which artery is involved, whether it explains the symptoms and whether the brain and general health permit intervention. Treatment after a large or disabling stroke may require a different plan from treatment after a brief TIA.

Carotid narrowing without recent symptoms needs a separate discussion. Modern medical treatment and recent trial evidence are important; a procedure is not routine for everyone with plaque. The degree and characteristics of the narrowing, expected health over time, procedural risk and your preferences all matter. Read the stroke prevention video article.

Which investigations guide the decision?

Carotid duplex ultrasound assesses plaque and blood flow. CT or MR angiography may clarify anatomy, while brain imaging and stroke assessment help identify the cause and extent of an event. Not all strokes come from the carotid arteries. Previous neck surgery or radiotherapy, heart and lung health, kidney function and medicines can affect the options.

How do the procedures differ?

What is carotid endarterectomy?

Endarterectomy removes plaque through an incision in the neck and an opening in the artery. The artery is then repaired, sometimes using a patch. Anaesthesia may be general or local/regional according to the plan. This is an established option for appropriately selected disease, but its expected stroke-prevention benefit must outweigh the immediate risks of the operation.

What is carotid artery stenting?

Stenting uses a catheter to place a mesh support inside the narrowed artery, with measures chosen to limit debris reaching the brain. Access route and technique depend on anatomy and the treating team. Stenting avoids the same neck dissection as endarterectomy, but does not eliminate stroke risk. Age, arterial tortuosity, calcification and other factors can change the balance between approaches.

What is TCAR (transcarotid artery revascularisation)?

TCAR is a form of carotid stenting performed through a small incision low in the neck. It accesses the carotid artery directly and temporarily reverses blood flow through a protection circuit while the narrowed segment is treated. The aim is to carry loosened plaque particles away from the brain. Unlike transfemoral stenting through the groin, this route avoids passing catheters through the aortic arch.

It may be considered for selected patients who need carotid intervention, including some for whom the transfemoral route is less suitable. Neck and artery anatomy, symptoms, overall health and the ability to take the required antiplatelet medicines affect suitability. TCAR still carries risks including stroke, bleeding, arterial injury, blood-pressure changes and stent narrowing or blockage; the protection system does not eliminate them.

Choice between TCAR, endarterectomy, another stenting approach and medical care requires an individual assessment. Local availability, appropriate devices and a suitably experienced team must be confirmed before planning TCAR, including checking current device safety notices.

When might medical treatment be preferable?

Medicines, smoking cessation and management of cholesterol, blood pressure and diabetes are central to care. Some patients are best managed with these measures and monitoring rather than a procedure. Antiplatelet choices depend on the clinical situation; do not start, combine or stop blood-thinning medicines without advice. A recommendation for monitoring should include a follow-up plan and clear symptom instructions.

What risks should be discussed?

Both procedures can cause stroke and, less commonly, death. Other risks include bleeding, heart complications and recurrent narrowing. Endarterectomy can cause neck swelling, wound problems or injury to nearby nerves affecting voice, swallowing or facial movement. Stenting carries puncture-site, contrast and vessel-injury risks and requires a suitable antiplatelet plan. The risk comparison should be specific to your circumstances rather than based on incision size alone.

What happens after treatment?

Monitoring includes neurological function, blood pressure and the wound or puncture site. Your team explains medicines, activity, driving and when to seek help. Recovery varies with the procedure, general health and any recent stroke. Follow-up may include ultrasound; cardiovascular prevention continues because treating one narrowing cannot remove every cause of stroke.

New stroke symptoms after treatment are still an emergency. Rapidly increasing neck swelling, trouble breathing, collapse or severe uncontrolled bleeding also needs emergency help. Report wound infection or other concerning changes promptly rather than waiting for a scheduled review.

What should I ask before deciding?

• Is this narrowing likely to have caused my symptoms?
• What benefit is expected with a procedure compared with medical treatment?
• Why does this approach suit my anatomy and overall risk?
• What medicines and follow-up will I need?

The safer vascular care article supports this shared discussion.

How can I arrange a carotid second opinion?

After urgent symptoms have been assessed, contact Dr Andrew Choong's clinic at Mount Elizabeth Novena Specialist Centre, Singapore, for a planned review. Bring brain and artery scan images, reports, discharge information and medicines. For background on his academic work, see Dr Choong's publications.