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Ask Rezzy/Febrile seizures in children: classification, management and when to worry

Febrile seizures in children: classification, management and when to worry

RezzyRezzy

Febrile seizures can be quite scary for parents, but they're actually the most common type of seizure in children, usually occurring between the ages of 6 months and 5 years. Since you're prepping for the UKMLA AKT, it's important to distinguish between the types and know the NICE guidelines for management.

1. Classification

We generally split these into two main categories based on their clinical features:

  • Simple Febrile Seizures (Most common, ~70-80%):
    • Type: Generalized (usually tonic-clonic).
    • Duration: Short, lasting less than 15 minutes.
    • Frequency: Occurs only once within a 24-hour period or during the same febrile illness.
    • Recovery: Complete recovery within an hour.
  • Complex Febrile Seizures:
    • Type: Focal features (starts in one limb or side).
    • Duration: Prolonged, lasting more than 15 minutes.
    • Frequency: Multiple seizures (recurrence) within the same 24-hour period.
    • Recovery: May have a slower recovery or focal neurological deficits (like Todd's paralysis).

2. Management

The priority is always the "ABC" approach and finding the source of the fever.

  • Acute Phase: Most seizures stop by the time the child reaches the hospital. If the seizure lasts >5 minutes, use buccal midazolam or rectal diazepam.
  • Investigation: The goal is to find the cause of the fever (e.g., otitis media, UTI, viral URTI).
    • ==Crucial Rule: If there are any signs of meningitis or the child is <12 months old, a Lumbar Puncture (LP) must be strongly considered.==
  • Education: Reassure parents. Simple febrile seizures do not cause brain damage and only slightly increase the risk of future epilepsy (about 1-2%, similar to the general population).

3. When to Worry ("Red Flags")

You should be on high alert if you see:

  • Signs of meningitis (non-blanching rash, neck stiffness, bulging fontanelle).
  • A prolonged seizure (>15 mins) or status epilepticus.
  • Focal seizure activity.
  • Incomplete recovery or altered consciousness after the post-ictal phase.
  • The child is under 6 months old (febrile seizures are rare here; think meningitis or metabolic issues).

I'll pull up a table to help you quickly compare the two types for your revision.

FeatureSimple Febrile SeizureComplex Febrile Seizure
Duration< 15 minutes> 15 minutes
Seizure TypeGeneralizedFocal
FrequencyOnce in 24 hoursMultiple in 24 hours
RecoveryRapid, full recoveryMay have focal deficits
Epilepsy Risk~1% (General population)~4-12%

That table should make the distinctions clear for any MCQ that comes your way!

To help you lock this in, I've found some high-yield lessons and flashcards specifically tailored for pediatric emergencies and seizure management.

Those lessons and flashcards cover the key points for the UKMLA. Remember, the most important thing in a clinical scenario is often deciding whether to discharge (simple seizure, source found, child well) or investigate further (complex features or signs of meningitis).

Would you like to try a quick quiz on this to see how you'd handle a clinical case?

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