Related Experiment Video
Updated: Aug 29, 2026

Multiplex Therapeutic Drug Monitoring by Isotope-dilution HPLC-MS/MS of Antibiotics in Critical Illnesses
Published on: August 30, 2018
[Monitorization of blood levels of vancomycin in children with multi-resistant bacterial infections]
1Pronto Socorro, Instituto da Criança, Hopsital das Clinicas, FMUSP, São Paulo, SP.
Insights
Vancomycin dosing in children with resistant infections shows unpredictable serum concentrations. Therapeutic drug monitoring is crucial for effective vancomycin treatment in pediatric patients.
Area of Science:
- Pediatric pharmacology
- Infectious diseases
- Clinical pharmacy
Context:
- Vancomycin pharmacokinetics are less understood in pediatric populations compared to adults.
- Multi-resistant bacterial infections pose a significant challenge in pediatric care.
- Optimizing antibiotic therapy in children requires careful consideration of drug levels.
Purpose:
- To investigate vancomycin serum concentrations in children with multi-resistant bacterial infections.
- To assess the variability of vancomycin levels following standard dosing protocols in pediatric patients.
- To evaluate the predictability of vancomycin pharmacokinetics in this specific demographic.
Summary:
- Serum vancomycin concentrations were measured in 22 children receiving standard doses for multi-resistant infections.
- Peak concentrations ranged widely (23-99 mcg/ml), with only 36% falling within the 30-40 mcg/ml target range.
- Trough concentrations were observed between 5-10 mcg/ml in 45% of cases, indicating significant variability.
Impact:
- These findings highlight the unpredictable nature of vancomycin pharmacokinetics in children.
- The study underscores the necessity of therapeutic drug monitoring for vancomycin in pediatric patients.
- Implementing routine blood level monitoring can improve treatment efficacy and patient outcomes.
Abstract:
Pharmacokinetics of vancomycin depends on many factors and one of them is the age of the patient. It is better known in adults and there are few studies in children. Therefore, we studied the serum concentrations in 22 children with multi-resistant bacteria infections that received vancomycin. The doses administered followed the recommended rules for its utilization. This study was made at the equilibrium phase and immunofluorescence was the method utilized. The peak serum concentrations varied from 23 to 99 mcg/ml and only in 8 children (36%) they varied from 30 to 40 mcg/ml. In 10 cases (45%) we found valley serum concentration between 5 to 10 mcg/ml. These observations confirm the imprevisibility of serum concentrations obtained from one single recommended dose. Therefore, due to the complexity of vancomycin pharmacokinetics, the monitoring of blood levels is recommended in order to obtain therapeutic success.
More Related Videos
Related Concept Videos
Determination of Multiple Dosing Parameters: Steady-State, Minimum and Maximum Concentrations
Therapeutic Drug Monitoring: Drug Analysis Methods
Clinical Significance of Antibiotic Resistance
Mechanism of Antibiotic Resistance in MRSA

