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蛛网膜下腔出血是一种常见病,国内报道发病率为0.5～2%,占脑血管病的5～12%。引起蛛网膜下腔出血的原因很多,主要为各种动脉瘤(其中包括先天性的、动脉硬化性的、感染性的)、各类型的血管畸形、血液病以及其它原因引起的各种血管病变(如感染中毒、过敏、肿瘤等)。蛛网膜下腔出血分为损伤性、继发性、自发性三大类。由外伤造成的为损伤性的;脑实质内血管破裂流出的血液穿破脑组织而进入脑室或蛛网膜下腔时为继发性
Subarachnoid hemorrhage is a common disease, the incidence of domestic coverage of 0.5 to 2%, accounting for 5 to 12% of cerebrovascular disease. Subarachnoid hemorrhage caused by many reasons, mainly for a variety of aneurysms (including congenital, arteriosclerosis, infectious), various types of vascular malformations, blood diseases and other causes of various vascular lesions (Such as infection, allergy, cancer, etc.). Subarachnoid hemorrhage is divided into injury, secondary, spontaneous three categories. Caused by trauma for the injury; intraparenchymal vascular rupture of blood flow through the brain tissue into the brain or subarachnoid space is secondary