In order to verify the reaction mechanism of the abovementioned research, rat intracranial aneurysm models were established, and the levels of SOD, T-AOC, and MDA in the brain tissue of experimental rats, as well as the changing trend of nNOS, iNOS, and p22phox, p91phox, and p47phox protein expression levels, were detected for verification. Here, NOS1 is linked to Dilatation of the cerebral artery.