Identification of children at very low risk of clinically-important brain injuries after head trauma: a prospective cohort study. The goal of study was to identify children at very low risk of clinically-important traumatic brain injuries (ciTBI) for whom CT might be unnecessary.They studied and interpreted data from 42,414 kids younger than 18 years old with GCS of 14-15. In children less than 2 years old:
1. Normal mental status
2. No scalp haematoma except frontal
3. No loss of consciousness or loss of consciousness for less than 5 s
4. Non-severe injury mechanism
5. No palpable skull fracture
6. Acting normally according to the parents
had a negative predictive value for ciTBI 100.0%, and sensitivity of 100%