CATCH (Canadian Assessment of Tomography for Childhood Head injury) Rule
Use in patients up to 16 yrs with minor head injury and initial GCS at least 13, injury within 24 hrs, plus at least one of the following: blunt trauma with witnessed LOC, amnesia, witnessed disorientation, vomiting 2+ times at least 15 mins apart, persistent irritability if under 2 years old. Do NOT use if: penetrating skull injury, depressed fx, focal neuro deficit, developmental delay, child abuse, re-eval after prior head injury, pregnant patient. Note: We recommend using PECARN, as it is more widely validated.
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