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. 2021 Apr 26;72(8):1369-1378.
doi: 10.1093/cid/ciaa224.

The Effect of Renal Replacement Therapy and Antibiotic Dose on Antibiotic Concentrations in Critically Ill Patients: Data From the Multinational Sampling Antibiotics in Renal Replacement Therapy Study

Jason A Roberts  1   2   3   4 Gavin M Joynt  5 Anna Lee  5 Gordon Choi  5 Rinaldo Bellomo  6 Salmaan Kanji  7   8 M Yugan Mudaliar  9   10 Sandra L Peake  11   12   13 Dianne Stephens  14   15   16 Fabio Silvio Taccone  17 Marta Ulldemolins  18   19   20 Miia Maaria Valkonen  21 Julius Agbeve  22 João P Baptista  23 Vasileios Bekos  24 Clement Boidin  1   25   26 Alexander Brinkmann  27 Luke Buizen  28 Pedro Castro  29   30 C Louise Cole  10   31 Jacques Creteur  17 Jan J De Waele  32 Renae Deans  1 Glenn M Eastwood  6 Leslie Escobar  33 Charles Gomersall  5 Rebecca Gresham  31 Janattul Ain Jamal  34 Stefan Kluge  35 Christina König  35   36 Vasilios P Koulouras  37 Melissa Lassig-Smith  2 Pierre-Francois Laterre  38 Katie Lei  39 Patricia Leung  5 Jean-Yves Lefrant  40 Mireia Llauradó-Serra  41 Ignacio Martin-Loeches  18   42 Mohd Basri Mat Nor  43 Marlies Ostermann  39 Suzanne L Parker  1 Jordi Rello  44 Darren M Roberts  1 Michael S Roberts  45   46   47 Brent Richards  48 Alejandro Rodríguez  49   50 Anka C Roehr  51 Claire Roger  40 Leonardo Seoane  52   53 Mahipal Sinnollareddy  45   46 Eduardo Sousa  23 Dolors Soy  30   54 Anna Spring  24 Therese Starr  2 Jane Thomas  14 John Turnidge  12 Steven C Wallis  1 Tricia Williams  11   12   13 Xavier Wittebole  38 Xanthi T Zikou  55 Sanjoy K Paul  28 Jeffrey Lipman  1   2 SMARRT Study Collaborators and the ANZICS Clinical Trials Group
Collaborators, Affiliations

The Effect of Renal Replacement Therapy and Antibiotic Dose on Antibiotic Concentrations in Critically Ill Patients: Data From the Multinational Sampling Antibiotics in Renal Replacement Therapy Study

Jason A Roberts et al. Clin Infect Dis. .

Abstract

Background: The optimal dosing of antibiotics in critically ill patients receiving renal replacement therapy (RRT) remains unclear. In this study, we describe the variability in RRT techniques and antibiotic dosing in critically ill patients receiving RRT and relate observed trough antibiotic concentrations to optimal targets.

Methods: We performed a prospective, observational, multinational, pharmacokinetic study in 29 intensive care units from 14 countries. We collected demographic, clinical, and RRT data. We measured trough antibiotic concentrations of meropenem, piperacillin-tazobactam, and vancomycin and related them to high- and low-target trough concentrations.

Results: We studied 381 patients and obtained 508 trough antibiotic concentrations. There was wide variability (4-8-fold) in antibiotic dosing regimens, RRT prescription, and estimated endogenous renal function. The overall median estimated total renal clearance (eTRCL) was 50 mL/minute (interquartile range [IQR], 35-65) and higher eTRCL was associated with lower trough concentrations for all antibiotics (P < .05). The median (IQR) trough concentration for meropenem was 12.1 mg/L (7.9-18.8), piperacillin was 78.6 mg/L (49.5-127.3), tazobactam was 9.5 mg/L (6.3-14.2), and vancomycin was 14.3 mg/L (11.6-21.8). Trough concentrations failed to meet optimal higher limits in 26%, 36%, and 72% and optimal lower limits in 4%, 4%, and 55% of patients for meropenem, piperacillin, and vancomycin, respectively.

Conclusions: In critically ill patients treated with RRT, antibiotic dosing regimens, RRT prescription, and eTRCL varied markedly and resulted in highly variable antibiotic concentrations that failed to meet therapeutic targets in many patients.

Keywords: beta-lactam; continuous renal replacement therapy; extended daily dialysis; pharmacokinetic; renal clearance.

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