蛛网膜下隙出血(subarachnoidhemorrhage,SAH)有创伤性和非创伤性之分,前者由颅脑外伤引起;后者又称为自发性SAH(spontaneous,SAH),是神经系统常见的血管性疾病。女性多见,男女之比为1∶1.3～1.6,发病率随年龄增长而增加,60～69岁最多见,但年龄进一步增加,发病率反而下降[1]。1 Subarachnoid hemorrhage (SAH) is traumatic and non-invasive. The former is caused by craniocerebral trauma. The latter is also called spontaneous SAH. It is a common vascular disease of the nervous system. Female common, male to female ratio of 1: 1.3 to 1.6, the incidence increases with age, the most common in 60 to 69 years, but the age increased further, the incidence declined instead [1]. 1