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Uses and technique of pediatric lumbar puncture
1Department of Radiology, University of New Mexico School of Medicine, Albuquerque.
Insights
Lumbar puncture is recommended for young children with bacteremia, specific cellulitis, or unexplained fever and seizures. Cerebrospinal fluid glucose, Gram
Area of Science:
- Pediatric infectious diseases
- Neurology
- Clinical diagnostics
Background:
- Lumbar puncture (LP) is a critical diagnostic tool in pediatrics.
- Accurate interpretation of cerebrospinal fluid (CSF) is vital for managing serious infections like bacterial meningitis.
Purpose of the Study:
- To review the indications, contraindications, complications, and technique of pediatric lumbar puncture.
- To emphasize the diagnosis of bacterial meningitis in specific pediatric populations.
- To discuss CSF findings in partially treated infections and traumatic taps.
Main Methods:
- Comprehensive literature review of pediatric lumbar puncture and meningitis diagnosis.
Main Results:
- Lumbar puncture is recommended for children under 1 year with bacteremia, children with Haemophilus influenzae type B cellulitis, and children with complex fever and seizures.
- Antibiotic pretreatment minimally impacts CSF analysis for meningitis diagnosis.
- CSF glucose, Gram's staining, and WBC ratio reliably diagnose bacterial meningitis, even with traumatic taps.
Conclusions:
- Lumbar puncture remains a key procedure for diagnosing bacterial meningitis in at-risk pediatric patients.
- Specific clinical scenarios warrant lumbar puncture for definitive diagnosis.
- Combined CSF parameters offer high diagnostic accuracy for bacterial meningitis.
Objectives:
To review diagnostic and therapeutic indications, contraindications, complications, and technique of pediatric lumbar puncture with emphasis on diagnosis of bacterial meningitis in bacteremia, cellulitis, and fever with seizures and to discuss cerebrospinal fluid findings in partially treated infection and traumatic blood-contaminated spinal tap.
Research Design:
Literature review.
Conclusions:
We recommend lumbar puncture for children younger than 1 year with bacteremia, children with Haemophilus influenzae type B cellulitis, and children with fever and seizures not classified as simple. Pretreatment with antibiotics rarely changes cerebrospinal fluid characteristics such that a diagnosis of bacterial meningitis would be obscured. In a traumatic spinal tap, the equation to predict cerebrospinal fluid pleocytosis based on the peripheral blood cell count is invalid. When used together, cerebrospinal fluid glucose level, Gram's staining, and observed-to-expected ratio of white blood cells are highly reliable in diagnosing bacterial meningitis.