Epidural >5mm
Subdural >5mm or pan-hemispheric
Mass effect or shift
Herniation pattern
Complex, comminuted or depressed skull fracture
Basilar skull fracture
Parenchymal tear
AND/OR
< 24 months old with interhemispheric blood, subdural blood of different densities, or evidence of hypoxic injury
Cerebral contusion < 1 cm
Epidural < 5mm
Subdural < 5mm
Subarachnoid Hemorrhage
Normal CT
OR
Non-depressed or minimally depressed skull fracture
AND
NO intracranial hemorrhage
AND
> 6 months of age
Observe 3-4 hours
OR
Obtain head CT
< 2 years of age? (2-4 see supplemental document)**
Severe mechanism of injury 2
High risk hematoma 3
LOC > 5 seconds
Vomiting 4
> 2 years of age?
Severe mechanism of injury 2
Severe headache
Any loss of consciousness
Vomiting 4
GCS 14 or 15
Altered mental status
Seizure
GCS <13 or altered mental status
AND/OR
Obvious markedly depressed or open skull fracture or evidence of basilar skull fracture
AND/OR
Focal neurologic exam