Canadian CT Head Injury Rule

Identifies adults with minor head injury (GCS 13–15 with LOC, amnesia, or disorientation) who need head CT, from high- and medium-risk criteria, to rule out neurosurgical and clinically important brain injury.

High-Risk Criteria (any positive → CT to identify neurosurgical lesions)

Medium-Risk Criteria (any positive → CT to identify clinically important brain injury)