Intracranial aneurysm is a limited abnormal dilatation of intracranial arteries. The incidence of intracranial aneurysm is second only to cerebral thrombosis and hypertensive cerebral hemorrhage, and accounts for about 34%-50% of spontaneous subarachnoid hemorrhage. The causes of intracranial aneurysms include congenital aneurysms, atherosclerotic aneurysms and traumatic aneurysms. Clinical manifestations: Before the aneurysm ruptures, most patients have no clinical symptoms, while some patients may have symptoms and signs due to the large size and compression of adjacent nerves and brain tissues. If the aneurysm ruptures, it may lead to subarachnoid hemorrhage or intracerebral hematoma. The symptoms include sudden severe headache, nausea, vomiting and mental symptoms. Physical examination shows hemiparesis, cerebral nerve disorder and meningeal irritation. Lumbar puncture shows that the cerebrospinal fluid is bloody. The diagnosis is usually confirmed by cerebral angiography. Treatment of intracranial aneurysm is mainly divided into non-surgical treatment, surgical treatment and endovascular embolization. Non-surgical treatment: its purpose is to prevent or delay aneurysm rebleeding, relieve cerebral vasospasm, relieve cerebral edema, and protect brain function. Create conditions for surgery or other treatments. Applicable to the old and weak and have serious organ disease can not tolerate surgery; aneurysm in grade 5 or above can not be operated. Non-surgical treatment may include: absolute bed rest for more than 4 weeks, keep the patient quiet; appropriate lowering of blood pressure, lowering the cerebral perfusion pressure, reducing the impact of cerebral blood flow on the arterial wall; application of anti-fibrinolytic enzyme drugs; application of dehydration drugs to fight cerebral edema, reduce intracranial pressure; alleviate the cerebral vasospasm. Surgical treatment PK endovascular embolization treatment Surgical treatment: the purpose of aneurysm surgical treatment is to prevent the aneurysm from hemorrhage or rehemorrhage. At present, with the development of neuromicrographic surgery technology, the success rate of aneurysm surgery has been significantly improved, and the mortality rate of surgery has been reduced to 1-2%. Surgical treatments include direct and indirect surgeries: (1) direct surgery, which aims to cut off the traffic between the aneurysm and the aneurysm-carrying artery and keep the aneurysm-carrying blood vessels open. These include aneurysm neck clamping, aneurysm fusiform surgery, aneurysm reinforcement surgery, and intra-aneurysm embolization. Depending on the size of the aneurysm, the neck of the aneurysm, and the relationship between the aneurysm and the surrounding arteries, different surgical methods can be decided. (2) Indirect surgery is to ligate the common carotid artery or internal carotid artery on the side of the aneurysm in stages, so that the blood pressure at the distal end decreases, the impact of the blood flow on the aneurysm wall is alleviated, and the flow rate of blood into the aneurysm cavity decreases or thrombosis occurs. The internal carotid artery compression test, i.e. Matas test, is required before ligation to induce the establishment of collateral circulation, and the cerebral hemisphere on the diseased side can obtain blood supply from collateral circulation. Endovascular embolization: Endovascular embolization is the insertion of a microcatheter into the aneurysm cavity under the fluoroscopic view of a digital subtraction X-ray machine, and then a micro-spring coil is pushed through the catheter into the aneurysm cavity for the purpose of occluding the aneurysm while the aneurysm-carrying artery remains open. With the development of microinvasive neurosurgery, endovascular embolization of aneurysms (GDC) has been gradually popularized and has been used as one of the main therapeutic methods for the treatment of cerebrovascular diseases. The technique is safe, with little damage, reliable embolization of aneurysms and fast recovery of patients. GDC is an advanced neuro-interventional technique for the treatment of cerebral aneurysms invented by Italian scholar guglielmi in the 1990s.GDC is an extremely fine and soft memory micro-spring coil made of platinum. Generally, 8 hours of fasting before treatment, local anesthesia + sedation or general anesthesia is used for the treatment, the treatment process may take 2-3 hours, and after the treatment, it is kept lying down for 8 hours, and after a few days of observation, the patient will be discharged from the hospital after the disease is cured. It is compared with surgery, which is the traditional way of treating cerebral aneurysm, but general anesthesia, opening the skull, exposing and moving brain tissues, more intraoperative bleeding and slower postoperative recovery are the scruples of most of the patients, whereas GDC embolization technology is a minimally invasive technology, and the whole process is completed only in the catheter introduced after puncturing at the root of the thigh of the patient. It does not require craniotomy and exposure of brain tissue, with little or no intraoperative bleeding and fast postoperative recovery, and both have similar results.