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🧠 CAM-ICU · Delirium

CAM-ICU is positive if: Step 1 + Step 2 and (Step 3 or Step 4).
If Step 1 is negative, delirium is ruled out.

Step 1 · Acute onset or fluctuating course

🧠 NIHSS · Stroke Scale

1a. Level of Consciousness 1b. LOC Questions 1c. LOC Commands 2. Best Gaze 3. Visual Fields 4. Facial Palsy 5. Motor Arm (R) 6. Motor Arm (L) 7. Limb Ataxia 8. Sensory 9. Best Language 10. Dysarthria 11. Extinction/Inattention

🧠 Fisher Scale · Subarachnoid Hemorrhage

Grade	Description
1	No blood detected on CT scan.
2	Diffuse subarachnoid blood < 1 mm thickness.
3	Localized clot and/or blood layer ≥ 1 mm.
4	Intraventricular hemorrhage (IVH) or intracerebral hemorrhage (ICH) present.

🧠 Hunt & Hess Scale · Subarachnoid Hemorrhage

Grade	Description
I	Asymptomatic or mild headache.
II	Moderate to severe headache, nuchal rigidity.
III	Drowsiness, confusion, or mild focal neurological deficit.
IV	Stupor, moderate to severe hemiparesis.
V	Deep coma, decerebrate posturing.

🧠 Marshall CT Classification · Traumatic Brain Injury

Category	Description
I	Normal CT scan.
II	Diffuse injury with cisterns present and midline shift < 5 mm.
III	Diffuse injury with compressed or absent basal cisterns.
IV	Midline shift ≥ 5 mm.
V	Evacuated mass lesion.
VI	Non-evacuated mass lesion > 25 cm³.