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Canadian CT Head Injury/Trauma Rule

Clears head injury without imaging.

Only Apply to GCS 13-15 with LOC, Amnesia to the Head Injury Event, or Confusion. Patients without this history rarely need a CT Head.
Exclusion Criteria: Age <16; Blood Thinners; Seizure after injury.

High Risk Criteria
Rules out need for neurosurgical intervention
Medium Risk Criteria
In addition to above, rules out "clinically important" brain injury (positive CT's that normally require admission)

Calculations must be re-checked and should not be used alone to guide patient care nor should they substitute for clinical judgement. See our full disclaimer.