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Vancomycin-associated nephrotoxicity in the critically ill: a retrospective multivariate regression analysis*
Timothy P Hanrahan1, Georgina Harlow, James Hutchinson
11Burns Trauma and Critical Care Research Centre, School of Medicine, The University of Queensland, Brisbane, Queensland, Australia. 2Department of Intensive Care Medicine, The Royal Brisbane and Women's Hospital, Brisbane, Queensland, Australia. 3Department of Anaesthesia and Critical Care, University Hospital Birmingham, Birmingham, United Kingdom.
Higher vancomycin levels and longer treatment increase acute kidney injury risk in critically ill patients. Continuous vancomycin infusion reduces this nephrotoxicity risk compared to intermittent dosing.
Area of Science:
- Pharmacology
- Nephrology
- Critical Care Medicine
Background:
- Acute kidney injury (AKI) is a significant concern in critically ill patients.
- Vancomycin is a crucial antibiotic for treating Gram-positive infections, but its use is associated with nephrotoxicity.
Purpose of the Study:
- To investigate the relationship between vancomycin dosing strategies, serum trough concentrations, and the development of AKI in critically ill patients.
- To identify independent predictors of vancomycin-induced nephrotoxicity.
Main Methods:
- Retrospective, single-center observational study.
- Analysis of data from 1,430 critically ill patients receiving vancomycin.
- Logistic regression used to identify predictors of nephrotoxicity.
Main Results:
- Higher median serum vancomycin concentrations and longer duration of therapy were significant predictors of nephrotoxicity.
- Concomitant vasoactive therapy also increased nephrotoxicity risk.
- Intermittent vancomycin infusion showed a significantly higher risk of nephrotoxicity compared to continuous infusion.
Conclusions:
- Elevated vancomycin serum concentrations and prolonged therapy duration are independently linked to increased nephrotoxicity.
- Continuous vancomycin infusion is associated with a lower incidence of AKI compared to intermittent infusion.
- Continuous infusion of vancomycin is recommended for critically ill patients to mitigate nephrotoxicity risk.
