Background: Continuous renal replacement therapy (CRRT) complicates antibiotic dosing in critically ill patients due to altered pharmacokinetics. The optimal dosing of piperacillin remains unclear. Therapeutic drug monitoring (TDM) can personalize piperacillin therapy and improve outcomes.
Objectives: This review investigates the effects of TDM-guided piperacillin dosing on pharmacokinetic target attainment and clinical outcomes in CRRT patients, analyses correlations with clinical outcomes, provides optimal dosing strategies for piperacillin and identifies future research areas.
Methods: A systematic search of PubMed, Scopus and Web of Science was conducted until December 2023, identifying studies on piperacillin pharmacokinetics and clinical outcomes in adult CRRT patients. Data on study characteristics, piperacillin exposures, TDM use, target attainment rates, mortality and length of stay were extracted. The risk of bias was assessed using the Newcastle-Ottawa Scale.
Results: Eleven observational studies were included. High pharmacokinetic variability was evident, with piperacillin target non-attainment in up to 74% of cases without TDM. Two studies with routine TDM showed increased target attainment rates of 80%-100%. Mortality ranged from 17% to 56%, with supratherapeutic concentrations (≥100 mg/L) associated with higher mortality. The impact of optimized piperacillin exposures on outcomes was inconclusive. Most studies demonstrated a low risk of bias.
Conclusions: TDM-guided piperacillin dosing in CRRT patients improved target attainment rates (≥80%). Mortality rates ranged from 17% to 56%, with inconsistent correlations between drug exposures and survival. Supratherapeutic concentrations were linked to higher mortality. Standardized TDM protocols are needed. Future research should establish clear exposure-response relationships and the impact of TDM on clinical outcomes.
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