Emergency Medicine · Trauma · Neurology
Canadian CT Head Rule calculator
Enter the published formula inputs below to calculate and interpret this score.
Clinical inputs
Result
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Formula inputs
- GCS <15 at 2 hours after injury
- Suspected open or depressed skull fracture
- Any sign of basal skull fracture
- At least 2 episodes of vomiting
- Age ≥65 years
- Retrograde amnesia >30 minutes
- Dangerous mechanism
Primary source
Stiell IG et al. The Canadian CT Head Rule for patients with minor head injury. Lancet (2001)
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