My mother's subarachnoid hemorrhage has been 67 hours.

1. Does your mother have a history of head injuries? If there is, it is not cerebrovascular disease, if not, it is spontaneous spider blood, which is generally caused by cerebral aneurysm and cerebral arteriovenous malformation, and tumors are generally not considered.

2. Didn't 2.CTA find anything unusual? That just means it's too small to be found, because CTA is basically a non-invasive examination, so the doctor's advice is not wrong. However, DSA is the gold standard for diagnosing intracranial aneurysm rupture and arteriovenous malformation, which has certain risks.

3. If your mother has spontaneous spider blood, the cause of spider blood is the possibility of intracranial aneurysm rupture. Because the surgical methods will be determined according to the size, location, orientation, neck width, anatomical relationship with surrounding blood vessels and Hunt-Hess classification, there are two surgical methods: craniotomy aneurysm clipping and interventional coil embolization.

4. I hope it will help you.