PECARN Pediatric Head Injury Rule

Identifies children (< 18 years) at very low risk of clinically important traumatic brain injury after blunt head trauma, in whom CT can typically be avoided; apply within 24 h of injury at GCS 14–15.

High-Risk Criteria, ≥ 2 years (any positive → CT recommended)

Intermediate-Risk Criteria, ≥ 2 years (any positive & all high-risk absent → observation vs CT)