Related Experiment Videos
Disposition of vancomycin during hemofiltration
Abstract:
The disposition of vancomycin was assessed in five patients receiving hemofiltration after intravenous dosing with an 18 mg/kg dose after a hemofiltration procedure. The serum concentration-time profile was characterized before, during, and after the next hemofiltration procedure. The t 1/2 of vancomycin was 136.0 +/- 27.2 hours (mean +/- SD) before hemofiltration and 4.1 +/- 1.2 during hemofiltration. Approximately 400 mg of vancomycin was recovered in the filtrate and the hemofiltration clearance was 152.6 +/- 21.5 ml/min. A significant relationship was observed between vancomycin clearance and ultrafiltration flow rate (r = 0.9914). A marked rebound in vancomycin serum concentration (52.4% +/- 15.6%) was observed in all patients. Hemofiltration has a significant effect on the disposition of vancomycin. Because of the marked interpatient variability in elimination t 1/2 and the degree and time course of the rebound, an individualized approach to vancomycin therapy in this patient population is recommended.
Insights
Hemofiltration significantly alters vancomycin levels, drastically reducing its half-life (t 1/2) during treatment. Post-hemofiltration, vancomycin serum concentrations rebound, necessitating personalized dosing strategies for this antibiotic.
Area of Science:
- Pharmacokinetics and Pharmacodynamics
- Nephrology and Critical Care Medicine
- Infectious Disease Management
Background:
- Vancomycin is a critical antibiotic for treating serious Gram-positive infections.
- Hemofiltration is used in critically ill patients to manage fluid and electrolyte balance.
- The impact of hemofiltration on vancomycin disposition in patients is not well-established.
Purpose of the Study:
- To investigate the pharmacokinetic changes of vancomycin during hemofiltration.
- To quantify vancomycin removal and clearance during hemofiltration.
- To assess the post-hemofiltration rebound effect on vancomycin serum concentrations.
Main Methods:
- Five patients receiving intravenous vancomycin underwent pharmacokinetic profiling.
- Serum vancomycin concentrations were measured before, during, and after hemofiltration.
- Vancomycin clearance and ultrafiltration rates were correlated.
Main Results:
- Vancomycin's elimination half-life (t 1/2) decreased from 136.0 hours to 4.1 hours during hemofiltration.
- Hemofiltration clearance of vancomycin was 152.6 ml/min, with approximately 400 mg removed.
- A significant rebound in vancomycin serum concentration (52.4%) was observed post-hemofiltration.
Conclusions:
- Hemofiltration significantly impacts vancomycin disposition, increasing its clearance and reducing its half-life.
- The observed rebound effect and interpatient variability necessitate individualized vancomycin dosing.
- Adjusted vancomycin dosing regimens are crucial for patients undergoing hemofiltration to ensure therapeutic efficacy.