什么是蛛网膜下腔出血 王诚 贵阳市第二人民医院 скачать в хорошем качестве

什么是蛛网膜下腔出血 王诚 贵阳市第二人民医院

什么是蛛网膜下腔出血 王诚 贵阳市第二人民医院 人脑膜由外向内依次是硬脑膜、蛛网膜和软脑膜，软膜脑与蛛网膜间的夹腔叫蛛网膜下腔，平时腔内充满脑脊液，脑大血管均在蛛网膜下腔内走行。当脑底或脑浅表部位的血管破裂后血液直接流入蛛网膜下腔时，就形成了蛛网膜下腔出血，一旦发病可危及生命。蛛网膜下腔出血发病急，表现为突发剧烈的持续头痛，可分布于前额、后枕或整个头部，并可延及颈、肩、背等部位，可能会伴有意识不清，呕吐等症状。资料显示，80%的蛛网膜下腔出血因脑动脉瘤破裂所致。CT检查或者腰椎穿刺脑脊液检查可确诊蛛网膜下腔出血，但对于脑动脉瘤的发现，目前全脑血管造影检查（DSA）是最可靠的手段，如条件限制，95%～98%有动脉瘤的病人也可以通过CT血管成像（CTA）和MR血管成像（MRA）检查发现到。 What is subarachnoid hemorrhage The dura mater, arachnoid and pia mater are in turn, The space between the pia mater and arachnoid is called subarachnoid space, Usually, the cavity is filled with cerebrospinal fluid, The great cerebral vessels all run in the subarachnoid space. When the blood vessels at the bottom or superficial part of the brain burst and the blood flowed directly into the subarachnoid cavity, It forms subarachnoid hemorrhage, It can be life-threatening in case of illness. Subarachnoid hemorrhage is very urgent, The symptoms are sudden and severe persistent headache, It can be distributed on the forehead, back pillow or the whole head, It can extend to neck, shoulder, back and other parts, There may be confusion, Vomiting and other symptoms. Data shows that, 80% of subarachnoid hemorrhage was caused by rupture of cerebral aneurysm. CT or CSF can diagnose subarachnoid hemorrhage, But for the discovery of cerebral aneurysm, At present, DSA is the most reliable method, If conditions limit, 95% - 98% of patients with aneurysm can also be found by CT angiography (CTA) and MR angiography (MRA).