Canadian CT Head Rule

mild head injury within 24 hours

inclusion: minor HI (defined as GCS 13-15, with LOC, Amnesia, or disorientation/LAD)

this is just a guide logic says that it excludes: those who had seizures, on anticoagulants, etc

1. High Risk (for neurological intervention)

- GCS <15 at 2 hours post-injury

- ≥ vomits

- ≥ 65

- Signs of Basal skull # (raccoon eyes, battle's sign, hemotympanum, csf otorrhoea, csf rhinorrhoea)

- suspected open or depressed skull # (clinical not xray)

2. Medium Risk (for brain injury on CT)

- amnesia before impact >30 minutes

- dangerous mechanism (pedestrian vs motor vehicle, ejected, fall from height >3 feet or 5 stairs)

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Lancet. 2001 May 5;357(9266):1391-6