Modified Fisher Grading Scale (SAH)

Select the modified Fisher grade (0–4) based on SAH thickness and intraventricular hemorrhage.

Choose one modified Fisher grade:

Grade 0 — No subarachnoid blood on CT. Grade 1 — Minimal or diffuse thin SAH without IVH. Grade 2 — Minimal or diffuse thin SAH with intraventricular blood. Grade 3 — Thick cisternal clot without intraventricular blood. Grade 4 — Thick cisternal clot with intraventricular blood.