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Population pharmacokinetics and probability of target attainment in patients with sepsis under renal replacement therapy receiving continuous infusion of meropenem: Sustained low‐efficiency dialysis and continuous veno‐venous haemodialysis
Author(s) -
Westermann Isabella,
Gastine Silke,
Müller Carsten,
Rudolph Wiebke,
Peters Frank,
Bloos Frank,
Pletz Mathias,
Hagel Stefan
Publication year - 2021
Publication title -
british journal of clinical pharmacology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.216
H-Index - 146
eISSN - 1365-2125
pISSN - 0306-5251
DOI - 10.1111/bcp.14846
Subject(s) - meropenem , renal replacement therapy , medicine , dialysis , pharmacokinetics , population , dosing , hemofiltration , renal function , peritoneal dialysis , continuous ambulatory peritoneal dialysis , anesthesia , hemodialysis , urology , surgery , antibiotics , environmental health , antibiotic resistance , microbiology and biotechnology , biology
Aims To describe the population pharmacokinetics (PK) and probability of target attainment (PTA) of continuous infusion (CI) of meropenem in septic patients receiving renal replacement therapy (RRT). Methods Fifteen patients without RRT, 13 patients receiving sustained low‐efficiency dialysis and 12 patients receiving continuous veno‐venous haemodialysis were included. Population PK analysis with Monte Carlo simulations for different dosing regimens was performed. For minimum inhibitory concentration 2 mg/L was chosen. The target was set as 50% time ≥4× minimum inhibitory concentration. Results The PK of meropenem was best described by a 1‐compartment model with linear elimination. Serum creatinine, residual diuresis and time on RRT, with no difference between sustained low‐efficiency dialysis and continuous veno‐venous haemodialysis, were found to be significant covariates affecting clearance, explaining >20% of the clearance between subject variability. PTA analysis showed that in patients with RRT, 2 g/24 h, meropenem CI achieved a PTA of 95%. In patients without RRT, the target was achieved with 3 g/24 h CI or prolonged infusion of 1 g meropenem over 8 hours but not with bolus application of 1 g meropenem for 8 hours. Only 2 patients (both without RRT) had meropenem concentrations below the target level. However, approximately half of the patients with RRT receiving CI 3 g/24 h meropenem had toxic concentrations. Conclusion We found relevant PK variability for meropenem CI in septic patients with or without RRT, leading to a substantial risk for overdosing in patients with RRT. This finding highlights the strong demand for personalized dosing in critically ill patients.