Carotid artery stenting is a catheter procedure that widens a narrowing in the carotid artery — the large vessel in the neck that supplies the brain — and holds the channel open with a mesh stent. Its purpose is not to make you feel more comfortable, but to reduce the risk of a future stroke caused by fragments breaking off an atherosclerotic plaque at this site and travelling to the brain. Stenting is usually considered for people with a severe narrowing who have already had warning symptoms: temporary weakness on one side of the body, transient slurred speech, or brief loss of vision in one eye. In selected cases it is also considered for severe narrowing without symptoms. The main alternative is open surgery to clear the plaque from the artery, and the choice between them depends on the shape, length and position of the narrowing in the neck, on your age and cardiac and respiratory fitness, and on whether the neck has had previous surgery or radiotherapy. In every case, medication and risk-factor control remain the foundation of prevention rather than an optional extra. One point deserves emphasis: a stent treats one source of stroke and does not protect against the others. Someone with atrial fibrillation or small-vessel disease inside the brain remains at risk, which is why no medicine should be stopped after stenting except on the doctor's instruction. Stenting also cannot repair damage caused by an earlier stroke, cannot restore lost brain function, and does not remove the need to control blood pressure, blood sugar and cholesterol. Smoking is the strongest modifiable factor in arterial disease and must be stopped outright. Whether stenting or surgery suits you is decided by neurological examination and imaging of the neck and brain arteries — not by reading.
Procedure steps
- 1
Neurological assessment and imaging of the neck arteries
The doctor asks in detail about any transient weakness, speech difficulty or loss of vision and exactly when it happened, and performs a full neurological examination. The neck arteries are imaged with ultrasound and then with CT or MR angiography to grade the narrowing, assess the shape of the plaque and check the brain arteries, and the brain itself is imaged for previous injury.
- 2
Medical preparation and local anaesthesia
Antiplatelet medicines are adjusted before the procedure on the doctor's instruction and blood pressure is optimised. The procedure is usually done under local anaesthesia at the puncture site with you awake, because staying alert allows your speech and limb movement to be monitored moment by moment during the work.
- 3
Reaching the artery and placing the protection device
An artery at the groin or arm is punctured and a thin catheter is guided under X-ray to the carotid artery. An embolic protection device is usually deployed — a small filter above the narrowing, or a technique that reverses the direction of flow — to capture any fragments released during dilatation before they can reach the brain.
- 4
Dilating the narrowing and deploying the stent
A balloon is inflated gently to prepare the narrowed segment, then a mesh stent is deployed to cover the plaque and stabilise the channel, sometimes followed by a further inflation inside the stent. Pulse, blood pressure and heart rhythm are watched closely, and you may be asked to move a hand or say a few words at set moments to confirm brain function.
- 5
Retrieving the protection device and neurological monitoring
The protection device is retrieved and imaging is repeated to confirm free flow to the brain, then the puncture site is closed. You are usually observed overnight with repeated neurological checks and close blood-pressure monitoring, because marked swings in pressure after the procedure need prompt treatment.
Before the procedure
Describe any previous neurological symptoms in precise detail, even if they lasted only minutes, because their timing changes both the decision and its urgency. Bring a written list of your medicines, highlighting antiplatelet drugs, anticoagulants and blood-pressure and diabetes treatment, and follow the doctor's instructions on adjusting them rather than adjusting them yourself. Say whether you have ever reacted to X-ray contrast or have kidney disease. Stop smoking — it is the strongest modifiable factor in atherosclerosis. Get your blood pressure under control and record readings before the appointment, keep to the fasting time given, and wash the puncture area well. Bring someone to stay with you, and report any new chest pain, palpitations or breathlessness before the procedure.
After the procedure
Take the antiplatelet medicine exactly as prescribed and never stop it on your own, even before a dental extraction or minor surgery — ask your doctor first, because stopping early raises the risk of the stent blocking. Measure and record your blood pressure at home and report very high or very low readings. Keep the puncture site clean and dry, avoid heavy lifting and strenuous effort for the period specified, and do not drive until you are told you may. Complete your stop-smoking plan, control blood sugar, cholesterol and blood pressure, and keep your follow-up ultrasound appointments. Call an ambulance immediately — time is brain — for any of the following: **drooping of one side of the face, sudden weakness or numbness in an arm or leg, slurred speech or inability to understand speech, sudden loss of vision in one eye, severe dizziness with loss of balance, or a sudden severe unfamiliar headache**. Do not wait for symptoms to pass; the fact that they pass within minutes does not mean the danger has gone. Also seek urgent care for swelling or bleeding in the neck or at the puncture site, difficulty swallowing or breathing, or **a leg that suddenly becomes painful, swollen and warm** (possible deep vein thrombosis — do not massage the leg and do not wait).
Expected duration
The procedure usually takes one to two hours and is generally followed by one night in hospital for neurological observation and blood-pressure monitoring. Light activity usually resumes within two to five days, while your doctor sets the timing for strenuous effort and travel.
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