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蛛网膜下腔出血经四条血管造影甚至选择性血管造影仍不能发现病因时,人们就用“隐蔽性动脉瘤”来解释,认为动脉瘤一定存在,只是由于局部的血栓形成或血管痉挛,使其不能显影。作者对120名蛛网膜下腔出血者进行观察。经四根血管造影检查,28人(23%)未发现动脉瘤和其他出血源,在起病5天内作CT扫描,这28人中有20人出血在中脑基底的脑池和脑裂中,而出血主要局限于一个池内的有13例。其他92例发现动脉瘤者,出血范围广泛,交叉池、西氏裂等处都可见血液;其中20人伴脑组织内出血,6人脑室内出血。将非动脉瘤性中脑旁出血的13例(A组)、未发现动脉瘤的另外15例(B组)及有动脉瘤的92例(C组)比较如下:
Subarachnoid hemorrhage by four angiography or even selective angiography still can not find the cause, people use the “hidden aneurysm” to explain that the aneurysm must exist, but due to local thrombosis or vasospasm, so that it Can not develop. The authors observed 120 patients with subarachnoid hemorrhage. After four angiographic examinations, no aneurysm and other bleeding sources were found in 28 (23%) and CT scans were performed within 5 days of onset, of which 20 of 28 bleed out in the cerebral pools and brain fissures of the midbrain base , And bleeding was confined to a pool of 13 cases. The other 92 cases found aneurysms, a wide range of hemorrhage, cross ponds, such as the West’s cracked blood can be seen; of which 20 were with intracerebral hemorrhage, intraventricular hemorrhage in 6. Thirteen patients (group A) with non-aneurysmal midbrain hemorrhage, another 15 patients without aneurysm (group B), and 92 patients with aneurysm (group C) were compared as follows: