One of the most common ED scenarios: a toddler has a seizure at home, arrives postictal, and is now febrile but otherwise stable. Parents are panicked. For rookies, the challenge is deciding: Is this a benign febrile seizure, or something more dangerous like meningitis or epilepsy?
What Is a Febrile Seizure?
- Seizure occurring in child 6 months–5 years.
- Associated with fever ≥38°C.
- No prior afebrile seizures, CNS infection, or acute metabolic cause.
- Occurs in 2–5% of children.
Types of Febrile Seizures
- Simple febrile seizure (most common):
- Generalized tonic-clonic.
- Lasts <15 min.
- Occurs once in 24 hours.
- Full recovery, no focal deficits.
- Complex febrile seizure:
- Focal features.
- Lasts >15 min.
- Recurs within 24 hours.
- Postictal neuro deficit (Todd’s paralysis).
Rookie pearl: Simple = benign; complex = higher risk of epilepsy and needs more workup.
Step 1: ED Priorities
- ABCs, oxygen, IV/IO if ongoing seizure.
- Check glucose immediately.
- If seizure >5 min → give benzodiazepine (lorazepam/midazolam/diazepam).
- After seizure stops: monitor vitals, return to baseline.
Step 2: Evaluate the Fever
- Source? (viral URI, otitis media, gastroenteritis).
- Red flags: meningismus, persistent altered mental status, bulging fontanelle, petechial rash.
- Always rule out CNS infection in high-risk groups (infants <12 mo, immunocompromised, incomplete vaccination).
Step 3: When to Do More
- Simple febrile seizure:
- No labs or imaging needed in well-appearing child >12 months with clear fever source.
- Observation, reassurance, discharge.
- Complex febrile seizure or red flags:
- Consider labs (CBC, electrolytes, cultures).
- Lumbar puncture if meningitis suspected.
- CT/MRI if focal deficits, trauma, or abnormal neuro exam.
- Admit if recurrent, prolonged, or unsafe for discharge.
Step 4: Parent Education
- Febrile seizures are frightening but usually benign.
- Do not place objects in child’s mouth during seizure.
- Place child on side, protect from injury.
- Most children outgrow febrile seizures by age 5.
- Recurrence risk: ~30%. Epilepsy risk: slightly increased (~2–4%).
Common Rookie Mistakes
- Over-investigating simple febrile seizures (CT, LP, labs when not indicated).
- Missing meningitis in child with fever + seizure + persistent AMS.
- Calling focal or prolonged seizures “simple.”
- Not educating parents — fear leads to unnecessary future ED visits.
Rookie Pearls
- If it’s short, generalized, single, and child returns to baseline → likely simple.
- Always think meningitis if fever + seizure + altered mental status.
- Reassurance is treatment — parents need explanation and guidance.
- Complex febrile seizures deserve more evaluation and often admission.
Take-Home Message
For rookies:
- Simple febrile seizures = benign, no extensive workup needed.
- Complex febrile seizures = red flag — investigate and admit if needed.
- Always consider meningitis in febrile seizure presentations.
Remember: The seizure may look scary, but your calm, structured approach reassures families and saves lives when it’s more than just febrile.
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