Intracranial aneurysm is an abnormal bulge caused by local vascular wall damage caused by congenital abnormalities or acquired injuries, and gradually expanding under the action of hemodynamic load and other factors. The prevalence of intracranial aneurysms in the population ranges from 2% to 7%, and it can occur at any age. It is common in 40-60 years old, but there are obvious regional and ethnic differences in the incidence rate[1,2]。 A transarterial cerebral angiography study suggests that the prevalence of intracranial aneurysms in the Asian population ranges from 2.5% to 3.0%[3]。 Once an intracranial aneurysm ruptures and bleeds, the fatality and disability rate is extremely high. Among them, 10% ~15% of patients die suddenly before seeking medical attention. The mortality rate of first bleeding is as high as 35%, and the mortality rate of second bleeding is as high as 60% ~80%. Most survivors are disabled[4]。 Therefore, active intervention for intracranial aneurysms with surgical indications has been widely recognized. There are two main surgical treatments for intracranial aneurysm: craniotomy and clamping and endovascular intervention. Results of the international subarachnoid aneurysm trial (ISAT) published in 2002[5]It was found that compared with craniotomy and clipping, endovascular interventional therapy can reduce the residual mortality rate and improve the clinical prognosis, thus establishing the position of interventional therapy in the treatment of intracranial aneurysm.
