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颅内动脉瘤破裂后的主要并发症包括蛛网膜下腔出血（ＳＡＨ）本身所引起的脑损害以及蛛网膜下腔出血后第７天所发生的脑血管痉挛。其发生机理为：颅内动脉瘤破裂后，去氧自由基通过直接作用于动脉壁而导致血管痉挛；此外，还可引起蛛网膜下腔红细胞脂氧化而诱发血管收缩。Ｕ７
The main complications after ruptured intracranial aneurysms include brain damage caused by subarachnoid hemorrhage (SAH) itself and cerebral vasospasm occurring on day 7 after subarachnoid hemorrhage. The mechanism is as follows: ruptured intracranial aneurysm, oxygen free radicals by acting directly on the arterial wall and lead to vasospasm; In addition, it can also cause subarachnoid red blood cell lipids and induce vasoconstriction. U7