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Risk factors for unsuccessful lumbar puncture in children
1Red Cross War Memorial Children's Hospital, Cape Town, South Africa; Department of Paediatrics and Child Health, Faculty of Health Sciences, University of Cape Town, South Africa. clairemprocter@gmail.com.
Insights
Procedural sedation may reduce unsuccessful lumbar punctures (LP) in children. This study found sedation associated with fewer failed LPs, though not in infants under three months old.
Area of Science:
- Pediatric Emergency Medicine
- Anesthesiology
- Clinical Procedures
Background:
- Lumbar puncture (LP) is a common procedure in pediatric emergency care.
- Unsuccessful LPs can lead to diagnostic delays and increased healthcare costs.
- Limited data exists on factors influencing LP success in African children.
Purpose of the Study:
- To investigate the association between procedural sedation and the success rate of lumbar punctures in children.
- To test the hypothesis that children receiving sedation have a lower likelihood of unsuccessful LPs.
Main Methods:
- A cross-sectional observational study was conducted at a South African children's hospital.
- Data were collected on 350 pediatric LPs performed between February and April 2013.
- Information on patient demographics, sedation use, and procedure outcomes was recorded.
Main Results:
- The overall prevalence of unsuccessful LPs was 32.3%.
- Sedation was administered in 30.6% of cases and was significantly associated with a reduced likelihood of unsuccessful LP (RR 0.5, p=0.002).
- This association was not significant in infants younger than three months (RR 1.20, p=0.56).
Conclusions:
- Unsuccessful lumbar punctures are a significant issue in pediatric care.
- Procedural sedation appears to be associated with improved LP success rates in children over three months.
- Further research is needed to determine if a formal sedation protocol could optimize LP success.
Background:
This descriptive study provides the first information on an association between the use of sedation and a reduction in the prevalence of unsuccessful lumbar puncture (LP) in African children of all races.
Objective:
Our hypothesis was that children who do not receive any procedural sedation are more likely to have unsuccessful LPs.
Methods:
A cross-sectional observational study examined LPs performed from February to April 2013, including details of the procedure, sedation or analgesia used, and techniques. The setting was the Medical Emergency Unit at Red Cross War Memorial Children's Hospital, Cape Town, South Africa, and the participants all children aged 0 - 13 years who had an LP in the unit during the time period.
Results:
Of 350 children, 62.9% were <12 months of age, the median age being 4.8 months (interquartile range 1.5 - 21.7). The prevalence of unsuccessful (traumatic or dry) LP was 32.3% (113/350). Sedation was used in 107 children (30.6%) and was associated with a reduction in the likelihood of unsuccessful LP (p=0.002; risk ratio (RR) 0.5 (95% confidence interval (CI) 0.34 - 0.78)) except in those <3 months of age, where sedation did not significantly reduce the likelihood (p=0.56; RR 1.20 (95% CI 0.66 - 2.18)).
Conclusions:
Unsuccessful LP was common. Sedation was not routinely used, but the results suggest that it may be associated with a reduction in the rate of unsuccessful LP. Unsuccessful LP may lead to diagnostic uncertainty, prolonged hospitalisation and unnecessary antibiotic use. Whether a procedural sedation protocol would reduce the rate of unsuccessful LP requires further study.
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