蛛网膜下腔出血是一种常见疾病,多数为先天性动脉瘤破裂所致,其次为脑动静脉畸形出血。临床表现多突然起病、头痛剧烈,反复呕吐和显著的脑膜刺激征象。腰穿脑脊液呈均匀血性或镜检可见许多绉缩红细胞,诊断不太困难。近年来有关蛛网膜下腔出血误诊和漏诊的报导颇多,有的误诊率高达26.9％。造成诊断上错漏的主要原因:一方面是因为症状表现不 Subarachnoid hemorrhage is a common disease, mostly due to congenital aneurysm rupture, followed by bleeding from cerebral arteriovenous malformations. Sudden onset of clinical manifestations, severe headache, repeated vomiting and significant signs of meningeal irritation. Lumbar wear cerebrospinal fluid were bloody or microscopic examination showed many red blood cells, the diagnosis is not too difficult. In recent years, misdiagnosis and missed diagnosis of subarachnoid hemorrhage a lot, some misdiagnosis rate as high as 26.9%. The main reason for the wrong diagnosis on the one hand, because the symptoms do not show