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Published in: BMC Nephrology 1/2024

Open Access 01-12-2024 | Piperacillin | Research

Antibiotic dosing recommendations in critically ill patients receiving new innovative kidney replacement therapy

Authors: Susan J. Lewis, Bruce A. Mueller

Published in: BMC Nephrology | Issue 1/2024

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Abstract

Background

The Tablo Hemodialysis System is a new innovative kidney replacement therapy (KRT) providing a range of options for critically ill patients with acute kidney injury. The use of various effluent rate and treatment durations/frequencies may clear antibiotics differently than traditional KRT. This Monte Carlo Simulation (MCS) study was to develop antibiotic doses likely to attain therapeutic targets for various KRT combinations.

Methods

Published body weights and pharmacokinetic parameter estimates were used to predict drug exposure for cefepime, ceftazidime, imipenem, meropenem and piperacillin/tazobactam in virtual critically ill patients receiving five KRT regimens. Standard free β-lactam plasma concentration time above minimum inhibitory concentration targets (40–60%fT> MIC and 40–60%fT> MICx4) were used as efficacy targets. MCS assessed the probability of target attainment (PTA) and likelihood of toxicity for various antibiotic dosing strategies. The smallest doses attaining PTA ≥ 90% during 1-week of therapy were considered optimal.

Results

MCS determined β-lactam doses achieving ∼90% PTA in all KRT options. KRT characteristics influenced antibiotic dosing. Cefepime and piperacillin/tazobactam regimens designed for rigorous efficacy targets were likely to exceed toxicity thresholds.

Conclusion

The flexibility offered by new KRT systems can influence β-lactam antibiotic dosing, but doses can be devised to meet therapeutic targets. Further clinical validations are warranted.
Appendix
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Metadata
Title
Antibiotic dosing recommendations in critically ill patients receiving new innovative kidney replacement therapy
Authors
Susan J. Lewis
Bruce A. Mueller
Publication date
01-12-2024
Publisher
BioMed Central
Published in
BMC Nephrology / Issue 1/2024
Electronic ISSN: 1471-2369
DOI
https://doi.org/10.1186/s12882-024-03469-2

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