Subarachnoid hemorrhage scales

Hunt Hess (Neurosurgery 1998)
Grade Clinical Condition
0 Unruptured
1 asymptomatic or minimal headache/nuchal rigidity
2 Mod/severe headache, nuchal rigidity, no neuro deficit except CN palsy
3 drowsy confused, mild focal deficit
4 stupor, moderate/severe hemiparesis, possible early decerebrate
5 deep coma


Fisher scale (based on CT) (Neurology 1980)
Score Description
1 No blood
2 diffuse deposition or vertical layers <1 mm thick, no clots
3 localized clot and/or vertical layers > 1 mm thick
4 intracerebral or intraventricular clots with diffuse or no blood


Ogilvy Carter System for prognosis (Neurosurgery 1998; 42:959-970)

Points Description
1 Hunt Hess grade > 3
1 Fisher score > 2
1 Aneurysm size > 10 mm
1 Age > 50
1 Giant (> 25 mm) posterior circulation location