Ventricular fluid levels of chloramphenicol in infants

Area of Science:

• Pediatric Pharmacology
• Neuropharmacology
• Infectious Diseases

Background:

• Chloramphenicol is an antibiotic used to treat bacterial infections.
• Gram-negative ventriculitis and meningitis are serious central nervous system infections.
• Previous treatment failures with chloramphenicol in these conditions suggest potential issues with drug delivery to the cerebrospinal fluid.

Purpose of the Study:

• To investigate the pharmacokinetics of chloramphenicol in the ventricular fluid of infants.
• To determine the time to peak ventricular fluid levels of chloramphenicol.
• To assess the variability in chloramphenicol penetration into the cerebrospinal fluid.

Main Methods:

• Intravenous administration of chloramphenicol to two infant patients.
• Serial sampling of ventricular fluid and serum.
• Measurement of chloramphenicol concentrations in both sample types.

Main Results:

• Peak chloramphenicol concentrations in ventricular fluid were achieved approximately 3 hours post-intravenous administration.
• Ventricular fluid to serum concentration ratios varied significantly between patients (57.5% in one, 22.5% in the other).
• This variability suggests unpredictable penetration of chloramphenicol into the cerebrospinal fluid.

Conclusions:

• The unpredictable penetration of chloramphenicol into infant ventricular fluid may contribute to treatment failures.
• Further research is needed to optimize chloramphenicol dosing for central nervous system infections in infants.
• Understanding drug pharmacokinetics in cerebrospinal fluid is crucial for effective antibiotic therapy.