Table 1.

Canadian CT head rule and New Orleans Criteria

Canadian CT Head Rule High risk (for neurosurgical interventions)	New Orleans Criteria
• GCS score, 15 at two hours after injury	• Headache
• Suspected open or depressed skull fracture	• Vomiting
• Any sign of basal skull fracture (hemotympanum, “panda” eyes, cerebrospinal fluid otorrhoea, Battle’s sign).	• Older than 60 years
• Vomiting more than once	• Drug or alcohol intoxication
• Age >65 years	• Persistent anterograde amnesia (deficits in short-term memory)
Medium risk (for brain injury on CT)
• Persistent retrograde amnesia of greater than 30 minutes	• Visible trauma above the clavicle
• Dangerous mechanism of injury (pedestrian struck by vehicle, ejection from vehicle, fall from greater than three feet or five stairs)	• Seizure