Based on the fact that both ventricular hemorrhage and subarachnoid hemorrhage are independent risk factors for cerebral vasospasm, it is proposed that modified fisher grading of subarachnoid hemorrhage can be categorized into grades 0 to 4.
Grade 1.0: for CT without hemorrhage and without intraventricular or parenchymal hemorrhage, the incidence of vasospasm is 0%.
Grade 2.1: localized or diffuse subarachnoid hemorrhage with thickness <1mm not combined with ventricular hemorrhage, and the incidence of vasospasm is 24%.
Grade 3.2: localized or diffuse subarachnoid hemorrhage, thickness <1mm combined with ventricular hemorrhage, incidence of vasospasm is 33%.
Grade 4.3: localized or diffuse subarachnoid hemorrhage, thickness >1mm without ventricular hemorrhage, incidence of vasospasm is 33%.
Grade 5.4: localized or diffuse subarachnoid hemorrhage with a thickness of >1mm combined with ventricular hemorrhage and a 40% incidence of vasospasm.
The presence of subarachnoid hemorrhage requires active consultation and rational treatment as prescribed by the doctor.