1.What is intracranial aneurysm? The circulatory system supplies oxygen to all tissues and organs in the body through blood circulation, and the blood needed by the brain accounts for 1/4 of the total blood in the body. If abnormalities occur during the growth and development of blood vessels, the walls of the vessels will become thinner and gradually expand to produce aneurysms under the long-term impact of blood, and if they grow inside the skull, they are called intracranial aneurysms. 2.Are there many people suffering from intracranial aneurysm? Intracranial aneurysm is a common disease among cerebrovascular diseases, according to statistics, the incidence is 1%-2% of the whole population, and the number of ruptured aneurysm is 16 out of 100,000 people per year. 3.What are the risks of intracranial aneurysm? Intracranial aneurysm can lead to hemiplegia, aphasia, coma and death. Aneurysm is like a balloon, it has a certain capacity, when it cannot bear it, it will rupture, then the blood will flow to the brain tissue, leading to subarachnoid hemorrhage, ventricular hemorrhage, etc. The mortality rate of the first hemorrhage is 15-20%, if the patient does not die after the first hemorrhage and is not treated in time, the second hemorrhage will occur soon, and the mortality rate will be as high as 80%, so we call it Timing bomb. 4. What are the symptoms of intracranial aneurysm? If the aneurysm is small and does not rupture, there are no clinical symptoms, so it is difficult to diagnose. If the aneurysm is large, it will compress the optic nerve and the motoneurotic nerve, leading to vision loss and eyelid drooping, etc. If the aneurysm ruptures, the patient will feel severe pain, pale, sweating, coma, hemiplegia, aphasia and other symptoms. 5.How to diagnose intracranial aneurysm early? The most direct and accurate diagnosis method is whole brain angiography, so it is called the gold standard for aneurysm diagnosis. In recent years, neuroimaging technology has developed rapidly, like CT and magnetic resonance angiography can also detect part of intracranial aneurysm without trauma, but if the aneurysm is too small, it can only be determined by angiography. 6.How to treat intracranial aneurysm? ①Craniotomy, after craniotomy, the aneurysm is separated and clamped under microscope, but the clamp is likely to cause bleeding of the aneurysm, and the risk of deep aneurysm surgery is higher, and the patient’s recovery after surgery is slow, and some patients such as old and weak are not suitable for the surgery. Minimally invasive endovascular embolization of aneurysms. In the mid-seventies, interventional methods were invented to treat intracranial aneurysms, and the materials used at that time were mainly balloons, but the clinical results were not good; in the eighties, free spring coil embolization was carried out to treat intracranial aneurysms, and the spring coil was put into the aneurysm sac through a catheter to occlude it, but the operability and safety of the free spring coil were poor, and there were often problems such as spring coil dislodgement; in the nineties, the new electrolytic In the early 21st century, some people combined endovascular stents with GDC to treat those wide-necked or shuttle-shaped intracranial aneurysms, which were previously difficult to be cured by GDC alone, with obvious success. Therefore, it can be said that almost any site and any shape of aneurysm can be treated by interventional embolization. Endovascular interventional embolization for aneurysms is widely preferred by patients with aneurysms for its advantages of less trauma, less pain, faster recovery, stable efficacy, ability to be performed even during emergency bleeding periods, and ability to withstand suits even in the elderly and infirm. Before embolization of apical basilar artery aneurysm After embolization of aneurysm