Intracranial aneurysms tend to occur at the bifurcation of the arterial ring at the base of the brain, which is often weak in congenital development. As we age, this “weak link” gradually bulges under the constant impact of blood flow, resulting in aneurysms of various shapes and sizes. Ruptured intracranial aneurysms are most common in people aged 40 to 60 years, with an annual incidence of 6 to 10/100,000, second only to cerebral infarction and hypertensive cerebral hemorrhage. Patients may rupture intracranial aneurysms induced by emotional excitement or exertion, resulting in subarachnoid hemorrhage. The clinical presentation is a sudden, abnormally severe headache that feels like the head is about to explode, and some patients may temporarily lose consciousness. After subarachnoid hemorrhage is detected by cranial CT scan, cerebral angiography should be performed as soon as possible to determine the location, size and morphology of the aneurysm to provide the most reliable basis for treatment. Once the diagnosis is clear, early treatment (within 3 days after the onset) should be strived for. Surgical treatment mainly includes the traditional open microsurgery and the emerging neurointerventional treatment. These two methods have their own relative indications, advantages and disadvantages. With the development of microsurgery technology, Professor Yasargil of University of Zurich, Switzerland, perfected the cranial microsurgery, which greatly improved the surgical results of ruptured intracranial aneurysm. Nowadays, the technique of open microsurgery has matured to allow direct clamping of the aneurysm neck, i.e., aneurysm neck clamping, which has become the “gold standard” for the treatment of intracranial aneurysms. For aneurysms located in the anterior part of the arterial ring at the base of the brain, early clamping of the aneurysm neck can prevent rebleeding and remove the hemorrhage in the subarachnoid space early, which is beneficial to the prevention and treatment of cerebral vasospasm. However, aneurysms located in the posterior part of the arterial ring at the base of the brain are extremely difficult to operate and should be postponed, or neurointerventional treatment should be considered. 2.Neurointerventional treatment With the development of interventional techniques and materials, neurointerventional treatment has gradually developed into an important treatment method for intracranial aneurysms. It is generally believed that narrow carotid aneurysms are suitable for neurointerventional treatment: a microcatheter is delivered to the opening of the aneurysm and the aneurysm is occluded by using microspring coils or liquid materials, etc. to create a thrombus. Although neurointerventional treatment has the advantages of less damage, faster recovery and easier acceptance by patients, there are still some problems that cannot be avoided at present: (1) the aneurysm neck cannot be completely occluded, resulting in the continued growth of the aneurysm neck after surgery and a recurrence rate of more than 20%; (2) the cost is expensive.