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蛛网膜下腔出血是由于脑表面的血管破裂出血,血液直接流入蛛网膜下腔引起。其发病率约占脑血管病的10％。近年来由于脑血管造影等诊断技术的进步及显微外科手术在神经外科的应用,蛛网膜下腔出血发病原因及治疗措施等有较大进展。一、脑血管异常与蛛网膜下腔出血原发性蛛网膜下腔出血的病因分类,各家报道不一。但多数认为脑动脉瘤及脑血管畸形为蛛网膜下腔出血的两个最主要原因。近年来因高血压或动脉硬化及内科疾病所致者诊断多不困难,故不列入蛛网膜下腔出血的范畴内。
Subarachnoid hemorrhage is due to rupture of the blood vessels on the surface of the brain, causing blood to flow directly into the subarachnoid space. The incidence of about 10% of cerebrovascular disease. In recent years due to advances in diagnostic techniques such as cerebral angiography and microsurgery in neurosurgery, causes and treatment of subarachnoid hemorrhage have made great progress. First, the cerebrovascular abnormalities and subarachnoid hemorrhage primary subarachnoid hemorrhage etiology classification, various reports vary. However, the majority of cerebral aneurysms and cerebrovascular malformations are the two most common causes of subarachnoid hemorrhage. In recent years due to hypertension or atherosclerosis and medical diagnosis caused by more difficult, it is not included in the scope of subarachnoid hemorrhage.