Synopsis
Explain how endovascular coiling and microsurgical clipping secure a ruptured intracranial aneurysm, how specialists select between them, and why early source control does not end neurocritical care.
- Both coiling and clipping aim to exclude the ruptured aneurysm from arterial circulation while preserving the parent artery and essential branches.
- Coiling fills the sac endovascularly to promote thrombosis without craniotomy; clipping places a clip across the neck through an open microsurgical approach.
- NICE recommends joint interventional-neuroradiology and neurosurgical assessment using the clinical condition, aneurysm characteristics, and amount and location of blood.
Key red flags
Sudden recurrent headache, abrupt hypertension followed by reduced consciousness, a new deficit or rapidly increasing subarachnoid blood may represent rebleeding and demands immediate resuscitation and imaging.
An unsecured aneurysm should not be treated as stable because the admission severity score is favourable; early rebleeding risk remains consequential.
Aneurysm neck, branch incorporation, parent-vessel anatomy, clot requiring evacuation and access constraints can make an apparently simple preferred technique unsafe.
New deficit during or after treatment may reflect thromboembolism, parent-vessel occlusion, perforation, rebleeding, vasospasm, hydrocephalus or surgical injury and needs immediate diagnosis.
A secured aneurysm does not remove risks from delayed cerebral ischaemia, hydrocephalus, seizures, sodium disturbance or other untreated aneurysms.
Reduced consciousness and high haemorrhage burden indicate severe early brain injury but must not be used alone to deny transfer or a potentially beneficial securing procedure.
Abrupt neurological change around the procedure requires immediate assessment for rupture, thromboembolism, branch occlusion, infarction, swelling or hydrocephalus.
Reasoning priorities
Define culprit location, neck, parent artery, branches, multiplicity and access anatomy before treatment.
The most useful study demonstrates that the lesion fits the blood pattern and whether coils can be retained safely or a clip can reconstruct the neck.
Worked reasoning
A ruptured culprit aneurysm has been identified and an interventional procedure is a realistic option.
- The interventional neuroradiologist and neurosurgeon jointly review the patient's neurological and physiological condition, the aneurysm and parent-vessel anatomy, and the amount and location of subarachnoid blood and haematoma.
- Offer endovascular coiling when the sac can be secured while preserving the parent artery and branches; offer microsurgical clipping when coiling is unsuitable or surgical anatomy and associated pathology favour direct treatment.
- Explain the proposed plan and realistic alternatives, including immediate procedural risks, durability, follow-up and the possibility that no immediate intervention is appropriate with active reassessment.
- Carry out the agreed intervention at the earliest opportunity to reduce rebleeding exposure, without allowing transfer, resuscitation or essential anatomical planning to fragment the pathway.