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Penetration of ceftazidime into middle ear fluid in children with otitis media with effusion
P Bégué1, E N Garabédian, C Bertrand
1Department of Pediatrics, Hôpital des Enfants A. Trousseau, Paris, France.
Insights
Ceftazidime concentrations in children with otitis media with effusion exceeded therapeutic levels in serum and middle ear fluid for over 4 hours post-injection. This supports ceftazidime
Area of Science:
- Pediatric infectious diseases
- Pharmacokinetics and drug efficacy
- Otolaryngology
Background:
- Otitis media with effusion is common in children.
- Gram-negative pathogens often cause middle ear infections.
- Effective antibiotic penetration into middle ear fluid is crucial.
Purpose of the Study:
- To evaluate ceftazidime concentrations in serum and middle ear fluid.
- To determine the duration of therapeutic drug levels.
- To assess the drug's potential efficacy in treating pediatric otitis media.
Main Methods:
- Twenty-five children with otitis media with effusion were administered intravenous ceftazidime (50 mg/kg).
- Bilateral myringotomy with tympanostomy tube insertion was performed.
- Serum and middle ear fluid samples were collected to measure ceftazidime concentrations.
Main Results:
- Ceftazidime concentrations in serum and middle ear fluid surpassed 4 mg/L for at least 4 hours.
- Mean peak concentrations ranged from 11 to 14 mg/L, occurring 30-90 minutes post-injection.
- These levels are significantly above the minimal inhibitory concentrations for common gram-negative pathogens.
Conclusions:
- Intravenous ceftazidime achieves therapeutic concentrations in pediatric middle ear fluid.
- The drug's pharmacokinetic profile supports its clinical efficacy for chronic middle ear infections in children.
- Ceftazidime is a viable treatment option for otitis media with effusion in pediatric patients.
Abstract:
Twenty-five children with otitis media with effusion received ceftazidime 50 mg/kg intravenously before bilateral myringotomy with insertion of tympanostomy tubes. Concentrations of ceftazidime measured in serum and middle ear fluid exceeded 4 mg/L (i.e., largely above the minimal inhibitory concentrations for the gram-negative pathogens commonly recovered from children with otitis media) for at least 4 hours. Mean peak concentrations occurred 30 to 90 minutes after the injection and reached 11 to 14 mg/L. These results are in keeping with the clinical efficacy of ceftazidime in the treatment of chronic middle ear infections in children.