Brain aneurysm treatment encompasses two primary interventional approaches: open microsurgical clipping and minimally invasive endovascular coiling. The primary clinical objective is the permanent exclusion of a cerebral aneurysm—a localized bulge in a weakened intracranial arterial wall—from the high-pressure arterial circulation. Left untreated, a expanding or fragile aneurysm carries a significant risk of rupture, leading to subarachnoid hemorrhage (a life-threatening type of hemorrhagic stroke). Treatment choice depends on aneurysm anatomy, location, rupture status, and individual patient risk profiles, guided by neurosurgical and neurointerventional standards of care.

Prior to surgery, the patient is administered general anesthesia and positioned securely. For microsurgical clipping, a craniotomy is performed to access the brain surface. Using an operating microscope, the neurosurgeon navigates the subarachnoid spaces to expose the parent artery and aneurysm neck. A spring-loaded metallic clip is applied precisely across the neck, occluding flow into the aneurysm sac while leaving the main blood vessel open. Intraoperative microvascular Doppler ultrasound or indocyanine green (ICG) angiography confirms complete exclusion and vessel patency. The skull bone flap is reattached, and the scalp is closed. For endovascular coiling, a catheter is inserted into the femoral or radial artery under fluoroscopic guidance and navigated into the intracranial arterial circulation. A microcatheter is advanced into the aneurysm sac. Soft platinum coils are sequentially detached, filling the aneurysm lumen to block blood flow. Diagnostic angiography confirms occlusion, the catheter is removed, and the arterial access site is sealed.

The primary clinical benefit of cerebral aneurysm intervention is the prevention of primary or recurrent subarachnoid hemorrhage. Successful clipping or coiling eliminates high-pressure hemodynamic stress on the weakened arterial wall, significantly reducing mortality and severe neurological morbidity. Long-term clinical registries demonstrate that complete aneurysm occlusion prevents secondary stroke events, halts progressive cranial nerve compression, and provides durable vascular stability.

Recovery timelines vary substantially based on whether the aneurysm was unruptured or ruptured prior to intervention. Patients treated for unruptured aneurysms typically remain hospitalized for two to four days, returning to light activities within two to four weeks and full recovery within six to eight weeks. Conversely, patients undergoing treatment following acute subarachnoid hemorrhage require intensive care management for 10 to 21 days to monitor and treat cerebral vasospasm (arterial constriction). Full cognitive and physical rehabilitation following rupture can extend over six to twelve months.

Brain aneurysm repair treats unruptured intracranial saccular (berry) aneurysms, acutely ruptured intracranial aneurysms causing subarachnoid hemorrhage, recurrent or residual aneurysms following prior treatment, and dissecting or fusiform vascular malformations. Treatment indications are established based on size, location, morphological risk factors, family history, and patient age according to clinical guidelines.

Pre-procedural preparation involves high-resolution neurovascular imaging, including CT angiography (CTA), magnetic resonance angiography (MRA), or digital subtraction angiography (DSA). Diagnostic blood work assesses renal function, coagulation profiles, and electrolyte balance. Medications affecting blood clotting, such as antiplatelet agents or anticoagulants, are managed according to specialized neurointerventional protocols. Patients undergo complete medical clearance, pre-anesthesia evaluation, and fasting for eight hours prior to elective procedures.

Potential complications include intraoperative or post-operative intracranial hemorrhage, ischemic stroke due to thromboembolism or parent vessel occlusion, cerebral vasospasm, seizure activity, transient or permanent neurological deficits, infection (meningitis or wound infection), hydrocephalus requiring CSF diversion, arterial dissection, and risks associated with general anesthesia or contrast media exposure.

The clinical journey for brain aneurysm treatment begins with rapid diagnostic evaluation using computed tomography angiography (CTA) or digital subtraction angiography (DSA). In unruptured cases, patients undergo pre-operative planning, medical optimization, and risk stratification. The intervention takes place in a specialized neuro-operating room or hybrid neuro-interventional suite under general anesthesia. Post-procedure care occurs in an intensive care unit (ICU) or specialized neuro-ICU for continuous neurological monitoring. Recovery involves progressive physical and cognitive rehabilitation, followed by routine post-procedural imaging at designated intervals to confirm long-term aneurysm exclusion.