颅内动脉瘤是造成自发性蛛网膜下腔出血(SAH)的最常见原因。据欧美大宗尸检报告,颅内动脉瘤的发生率为0.2%~7.9%。据统计,动脉瘤破裂而导致SAH的早期死亡率在43%左右[1],2周内容易再次出血,死亡率高达60%~70%[2]。而存活者因脑血管痉挛等原因多有严重的后遗症,如颅神经麻痹、偏 Intracranial aneurysms are the most common cause of spontaneous subarachnoid hemorrhage (SAH). According to massive autopsy reports in Europe and America, the incidence of intracranial aneurysms was 0.2% to 7.9%. According to statistics, aneurysm rupture caused SAH early mortality rate of about 43% [1], 2 weeks easy to rebleeding, the mortality rate as high as 60% to 70% [2]. Survivors and other reasons due to cerebral vasospasm and more serious sequelae, such as cranial nerve paralysis, partial