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Gentamicin dosage in children with extensive burns
Insights
Severely burned children often require higher gentamicin doses due to low serum concentrations. This study found significantly lower gentamicin levels in burned children, necessitating adjusted dosing for effective treatment of infections.
Area of Science:
- Pharmacology
- Pediatric Medicine
- Infectious Diseases
Background:
- Gram-negative bacillary infections are common in severely burned children.
- Standard gentamicin dosages may be insufficient in this patient population.
Purpose of the Study:
- To investigate gentamicin pharmacokinetics in severely burned children.
- To determine if standard dosing achieves therapeutic serum concentrations in this group.
Main Methods:
- Pharmacokinetic studies comparing serum gentamicin levels in burned versus unburned children.
- Clearance studies to investigate antibiotic loss or increased excretion.
Main Results:
- Mean peak serum gentamicin levels were significantly lower in 18 burned children compared to 5 unburned children.
- 15 of 18 burned children had inadequately low peak serum levels (<3.0 mug/ml).
- Increased gentamicin requirement may be due to loss across burn wounds or increased urinary excretion.
Conclusions:
- Severely burned children often require higher gentamicin doses and more frequent administration than typically recommended.
- Therapeutic drug monitoring is crucial for optimizing gentamicin therapy in pediatric burn patients.
- Adjusted dosing strategies are essential for effective treatment of infections in this vulnerable population.
Abstract:
During the treatment of Gram-negative bacillary infections in severely burned children, it was noted that administration of standard dosages of gentamicin commonly produced inadequately low serum concentrations of the antibiotic. Pharmakokinetic studies demonstrated that mean peak serum gentamicin levels were significantly lower in 18 burned children as compared with peak serum levels in five unburned children. Furthermore, inadequately low peak serum levels (less than 3.0 mug/ml) were observed in 15 of 18 burned children and in only one unburned child. Clearance studies in two children suggested that the increased requirement for gentamicin can result from either loss of the antibiotic across burn wounds or increased urinary excretion. These studies indicate that the therapy of severe infections in children with major burns often requires administration of gentamicin at higher doses and more frequent intervals than usually employed.