Children’s Head injury Algorithm for the prediction of Important Clinical Events (CHALICE) Rule
Identifies children after head injury who meet CHALICE criteria for head computed tomography.
INSTRUCTIONS
Use this calculator to check whether any CHALICE history, examination, or mechanism criterion is present.
If at least one criterion is present, the rule supports head computed tomography consideration.
Witnessed loss of consciousness longer than 5 minutes*
Amnesia longer than 5 minutes*
Abnormal drowsiness*
Three or more vomiting episodes after head injury*
Suspicion of non-accidental injury*
Seizure after head injury without previous epilepsy*
Glasgow Coma Scale below 14, or below 15 if younger than 1 year*
Suspected penetrating or depressed skull injury, or tense fontanelle*
Signs of basal skull fracture*
Positive focal neurologic sign*
Bruise, swelling, or laceration larger than 5 cm if younger than 1 year*
