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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0
Canadian CT Head Rule outcome — no criterion present
Band: Canadian CT Head Rule outcome — no criterion present
Interpretation. Canadian CT Head Rule outcome — no criterion present
Suggested management. Categorical rule outcome, not a numeric risk score: CT is not indicated when the rule's inclusion and exclusion criteria are satisfied.
Canadian CT Head Rule: 0 — Canadian CT Head Rule outcome — no criterion present. Interpretation: Canadian CT Head Rule outcome — no criterion present What to do: Categorical rule outcome, not a numeric risk score: CT is not indicated when the rule's inclusion and exclusion criteria are satisfied. Inputs: GCS <15 at 2 hours after injury: false; Suspected open or depressed skull fracture: false; Any sign of basal skull fracture: false; At least 2 episodes of vomiting: false; Age ≥65 years: false; Retrograde amnesia >30 minutes: false; Dangerous mechanism: false Source: Stiell IG et al. The Canadian CT Head Rule for patients with minor head injury. Lancet (2001)
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Clinical 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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