Aneurysm Coiling vs Clipping — Which Is Safer? A Patient's Guide
If you or a family member has been diagnosed with a brain aneurysm, the two treatment options you will hear about are coiling and clipping. Here is an honest, evidence-based comparison.
What Is Aneurysm Clipping?
Clipping is open neurosurgery. The surgeon opens the skull (craniotomy), navigates to the aneurysm through brain tissue, and places a metal clip across the neck of the aneurysm to permanently exclude it from the blood circulation. It is highly effective but involves significant surgical trauma and recovery.
What Is Aneurysm Coiling (Endovascular Coiling)?
Coiling is done entirely from inside the blood vessels — no brain surgery required. Dr. Rohit Agarwal threads a microcatheter through a needle puncture in the groin artery, navigates it through the blood vessels up to the aneurysm in the brain, and carefully packs tiny platinum coils inside the aneurysm sac. The coils cause a blood clot to form inside the aneurysm, sealing it off from circulation.
The ISAT Trial Evidence
The landmark ISAT (International Subarachnoid Aneurysm Trial) comparing 2,143 patients showed that coiling resulted in better outcomes at 1 year — significantly fewer patients dead or dependent after coiling than clipping. This single trial changed practice worldwide, making coiling the preferred technique for most ruptured and unruptured aneurysms amenable to both approaches.
The Comparison
| Factor | Surgical Clipping | Endovascular Coiling |
|---|---|---|
| Brain surgery required? | Yes — craniotomy | No — catheter through groin |
| Anaesthesia | General anaesthesia | General anaesthesia (for brain safety) |
| Hospital stay | 7–14 days | 2–5 days |
| Recovery | 4–8 weeks | 1–2 weeks |
| Permanent occlusion | ~95–98% | ~85–90% (higher with flow diverters) |
| Re-treatment needed | Rare | ~15–20% over 10 years |
| Procedural mortality | 1–3% | 1–2% |
| Neurological outcome (ISAT) | Good outcome in 74% | Good outcome in 76.7% |
When Is Clipping Still Preferred?
For certain aneurysm shapes (wide-neck, some middle cerebral artery aneurysms), surgical clipping may offer better long-term occlusion. The decision is made on a case-by-case basis by the neurovascular team.
For brain aneurysm coiling in Lucknow at Medanta, call Dr. Rohit Agarwal: +91 860-445-3663.
Ready to Explore This Treatment?
Book a consultation with Dr. Rohit Agarwal to discuss if this approach is right for you.
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