Head trauma is one of the most common reasons kids come to the ED. Most are minor, but a small percentage hide clinically important traumatic brain injury (ciTBI). For rookies, the dilemma is balancing the risk of missing an injury with the risk of unnecessary CT radiation.
Why It Matters
- Head injury is the leading cause of death and disability in children.
- But most ED visits are minor bumps with no intracranial injury.
- CT scans carry radiation risk, especially in young kids (increased lifetime cancer risk).
- Clinical decision rules help rookies decide wisely.
Step 1: Initial ED Priorities
- ABCs first: airway, oxygen, hemodynamic support.
- GCS scoring (pediatric adjusted).
- Full neuro exam: pupils, cranial nerves, motor/sensory, mental status.
- Cervical spine precautions if significant mechanism.
Step 2: Decision Tools — PECARN Rule
The PECARN (Pediatric Emergency Care Applied Research Network) rule is the most validated. Separate pathways for <2 yrs and ≥2 yrs.
<2 Years (High-Risk Criteria for CT)
- GCS ≤14.
- Palpable skull fracture.
- Altered mental status.
Intermediate risk (consider CT vs observation):
- Occipital, parietal, or temporal scalp hematoma.
- Loss of consciousness ≥5 sec.
- Severe mechanism (MVC with ejection, fall >3 ft, head struck by high-impact object).
- Not acting normally per parent.
≥2 Years
High risk (CT):
- GCS ≤14.
- Signs of basilar skull fracture (hemotympanum, raccoon eyes, Battle sign, CSF leak).
- Altered mental status.
Intermediate risk (CT vs observation):
- History of LOC.
- Vomiting.
- Severe mechanism.
- Severe headache.
Rookie pearl: If no PECARN criteria → CT not needed, safe discharge with instructions.
Step 3: Imaging Choices
- CT head (non-contrast): gold standard for acute bleed/fracture.
- MRI: rarely in ED, used for subacute/chronic.
- Observation: 4–6 hrs in ED can safely replace CT in intermediate-risk kids.
Step 4: Management
- Admit if abnormal CT, persistent neuro deficit, seizures, or unstable.
- Safe discharge if: normal exam, no PECARN risk factors, tolerating PO, reliable caregivers.
- Provide head injury instructions: return if persistent vomiting, worsening headache, confusion, seizure, weakness.
Common Rookie Mistakes
- Scanning every bump → unnecessary radiation.
- Sending home altered children without imaging/observation.
- Missing basilar skull fracture signs.
- Not reassessing after observation period.
- Ignoring caregiver concern (“not acting normal” is important).
Rookie Pearls
- PECARN = your guide. Learn it, use it.
- Observe when unsure — many kids improve without scan.
- Always check for scalp hematoma in <2 yrs — strong predictor of injury.
- Avoid sedating children for unnecessary scans.
- Documentation of neuro exam and PECARN reasoning protects both patient and physician.
Take-Home Message
Pediatric head trauma is common, but most kids don’t need CT. For rookies:
- Use PECARN to guide decision-making.
- Scan if high risk, observe if intermediate, discharge if low risk.
- Always involve parents, give strict return precautions.
Remember: The safest scan is the one you avoid when it isn’t needed — but never miss a real TBI.
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