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Which children with febrile seizures need lumbar puncture? A decision analysis approach
Insights
A clinical assessment can identify children with fever and first-time seizures who do not need lumbar puncture (LP). This approach accurately identifies meningitis and spares unnecessary procedures in most children.
Area of Science:
- Pediatrics
- Neurology
- Infectious Diseases
Background:
- Lumbar puncture (LP) is often performed in children with fever and first seizures to rule out meningitis.
- The necessity of LP in all such cases is debated, leading to potential overtreatment.
Purpose of the Study:
- To identify clinical criteria that can accurately predict the absence of meningitis in children presenting with a first seizure and fever.
- To determine if these criteria can safely reduce the need for lumbar puncture.
Main Methods:
- Retrospective review of emergency room records for 241 children (6 months to 6 years) with a first seizure and fever.
- Analysis of history and physical examination findings to identify predictors of meningitis.
- Application of decision analysis to evaluate the sensitivity, specificity, and predictive values of identified criteria.
Main Results:
- Five clinical factors (pre-visit, seizure on arrival, focal seizure, abnormal physical/neurologic exam) effectively identified children with meningitis.
- These factors correctly identified all meningitis cases while potentially sparing 62% of children without meningitis from LP.
- The clinical assessment demonstrated 100% negative predictive value for meningitis.
Conclusions:
- A focused clinical assessment can reliably identify children with fever and first seizures who are unlikely to have meningitis.
- This approach offers a safe alternative to routine lumbar puncture, reducing invasive procedures and healthcare costs.
Abstract:
Whether all children brought to the emergency room with a first seizure and fever require lumbar puncture (LP) remains controversial. We reviewed the emergency room records of 241 children aged 6 months to 6 years who had this clinical picture. Five history and physical examination items discriminated between children with and without meningitis: a physician visit within 48 hours before the seizure; the occurrence of convulsions on arrival at the emergency room; a focal seizure; suspicious findings on physical and/or neurologic examination. Used in combination, these items (risk factors) identified all children with meningitis but would have spared 62% of children without meningitis the need for LP. In a decision analysis framework, they were as sensitive but more specific than LP in detecting children with meningitis. Most important, their negative predictive value was 100%.