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Oda K, Jono H, Kamohara H, Saito H. Population Pharmacokinetic Modeling of Unbound Meropenem in Patients Undergoing Continuous Renal Replacement Therapy: An Observational Cohort Study. Ther Drug Monit 2024:00007691-990000000-00227. [PMID: 38758632 DOI: 10.1097/ftd.0000000000001222] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Accepted: 02/15/2024] [Indexed: 05/19/2024]
Abstract
BACKGROUND The most effective dosing strategy of meropenem for patients undergoing continuous renal replacement therapy (CRRT) remains uncertain. This study aimed to analyze the population pharmacokinetics (popPKs) of unbound meropenem and establish an appropriate dosing approach. METHODS This prospective study involved 19 patients for the development of a popPK model and an additional 10 for its validation. Ethical approval was obtained. RESULTS The clearance of unbound meropenem was influenced by the sequential organ failure assessment (SOFA) score [=2.22 × (SOFA score/12)^1.88] and the effluent flow rate from the CRRT device, with an interindividual variability of 44.5%. The volume of distribution was affected by the simplified acute physiology score II [=23.1 × (simplified acute physiology score II/52)^1.54]. Monte Carlo simulations suggested meropenem doses ranging from 1.0 to 3.0 g/d using continuous infusion to achieve a target time above the 4 times of minimum inhibitory concentration of the unbound form (%fT>4×MIC) of 100% for definitive therapy. For empirical therapy, a dose of 1.0 g/d using continuous infusion was recommended to target %fT>MIC of 100%. CONCLUSIONS This study developed a popPK model for unbound meropenem in patients undergoing CRRT and formulated dosing guidelines. CLINICAL TRIAL REGISTRATION UMIN000024321.
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Affiliation(s)
- Kazutaka Oda
- Department of Pharmacy, Kumamoto University Hospital, Kumamoto, Japan
| | - Hirofumi Jono
- Department of Pharmacy, Kumamoto University Hospital, Kumamoto, Japan
- Department of Clinical Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan; and
| | - Hidenobu Kamohara
- Department of Intensive Care Medicine, Kumamoto University Hospital, Kumamoto, Japan
| | - Hideyuki Saito
- Department of Pharmacy, Kumamoto University Hospital, Kumamoto, Japan
- Department of Clinical Pharmaceutical Sciences, Graduate School of Pharmaceutical Sciences, Kumamoto University, Kumamoto, Japan; and
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Boyer J, Hoenigl M, Kriegl L. Therapeutic drug monitoring of antifungal therapies: do we really need it and what are the best practices? Expert Rev Clin Pharmacol 2024; 17:309-321. [PMID: 38379525 DOI: 10.1080/17512433.2024.2317293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2023] [Accepted: 02/07/2024] [Indexed: 02/22/2024]
Abstract
INTRODUCTION Despite advancements, invasive fungal infections (IFI) still carry high mortality rates, often exceeding 30%. The challenges in diagnosis, coupled with limited effective antifungal options, make managing IFIs complex. Antifungal drugs are essential for IFI management, but their efficacy can be diminished by drug-drug interactions and pharmacokinetic variability. Therapeutic Drug Monitoring (TDM), especially in the context of triazole use, has emerged as a valuable strategy to optimize antifungal therapy. AREAS COVERED This review provides current evidence regarding the potential benefits of TDM in IFI management. It discusses how TDM can enhance treatment response, safety, and address altered pharmacokinetics in specific patient populations. EXPERT OPINION TDM plays a crucial role in achieving optimal therapeutic outcomes in IFI management, particularly for certain antifungal agents. Preclinical studies consistently show a link between therapeutic drug levels and antifungal efficacy. However, clinical research in mycology faces challenges due to patient heterogeneity and the diversity of fungal infections. TDM's potential advantages in guiding Echinocandin therapy for critically ill patients warrant further investigation. Additionally, for drugs like Posaconazole, assessing whether serum levels or alternative markers like saliva offer the best measure of efficacy is an intriguing question.
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Affiliation(s)
- Johannes Boyer
- Division of Infectious Diseases, Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | - Martin Hoenigl
- Division of Infectious Diseases, Department of Internal Medicine, Medical University of Graz, Graz, Austria
- BioTechMed, Graz, Austria
- Translational Mycology Working Group, ECMM Excellence Center for Clinical Mycology, Medical University of Graz, Graz, Austria
| | - Lisa Kriegl
- Division of Infectious Diseases, Department of Internal Medicine, Medical University of Graz, Graz, Austria
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Novy E, Abdul-Aziz MH, Cheng V, Burrows F, Buscher H, Corley A, Diehl A, Gilder E, Levkovich BJ, McGuinness S, Ordonez J, Parke R, Parker S, Pellegrino V, Reynolds C, Rudham S, Wallis SC, Welch SA, Fraser JF, Shekar K, Roberts JA. Population pharmacokinetics of fluconazole in critically ill patients receiving extracorporeal membrane oxygenation and continuous renal replacement therapy: an ASAP ECMO study. Antimicrob Agents Chemother 2024; 68:e0120123. [PMID: 38063399 PMCID: PMC10777822 DOI: 10.1128/aac.01201-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 11/07/2023] [Indexed: 01/11/2024] Open
Abstract
This multicenter study describes the population pharmacokinetics (PK) of fluconazole in critically ill patients receiving concomitant extracorporeal membrane oxygenation (ECMO) and continuous renal replacement therapy (CRRT) and includes an evaluation of different fluconazole dosing regimens for achievement of target exposure associated with maximal efficacy. Serial blood samples were obtained from critically ill patients on ECMO and CRRT receiving fluconazole. Total fluconazole concentrations were measured in plasma using a validated chromatographic assay. A population PK model was developed and Monte Carlo dosing simulations were performed using Pmetrics in R. The probability of target attainment (PTA) of various dosing regimens to achieve fluconazole area under the curve to minimal inhibitory concentration ratio (AUC0-24/MIC) >100 was estimated. Eight critically ill patients receiving concomitant ECMO and CRRT were included. A two-compartment model including total body weight as a covariate on clearance adequately described the data. The mean (±standard deviation, SD) clearance and volume of distribution were 2.87 ± 0.63 L/h and 15.90 ± 13.29 L, respectively. Dosing simulations showed that current guidelines (initial loading dose of 12 mg/kg then 6 mg/kg q24h) achieved >90% of PTA for a MIC up to 1 mg/L. None of the tested dosing regimens achieved 90% of PTA for MIC above 2 mg/L. Current fluconazole dosing regimen guidelines achieved >90% PTA only for Candida species with MIC <1 mg/L and thus should be only used for Candida-documented infections in critically ill patients receiving concomitant ECMO and CRRT. Total body weight should be considered for fluconazole dose.
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Affiliation(s)
- Emmanuel Novy
- Faculty of Medicine, University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Queensland, Australia
- Université de Lorraine, SIMPA, Nancy, France
- Departement of anesthesiology, Critical care and peri-operative medicine, University hospital of Nancy, Nancy, France
| | - Mohd H. Abdul-Aziz
- Faculty of Medicine, University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Queensland, Australia
| | - Vesa Cheng
- Faculty of Medicine, University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Queensland, Australia
| | - Fay Burrows
- Department of Pharmacy, St. Vincent’s Hospital, Sydney, New South Wales, Australia
| | - Hergen Buscher
- Department of Intensive Care Medicine, St. Vincent’s Hospital, Sydney, New South Wales, Australia
- University of New South Wales, St Vincent’s Centre for Applied Medical Research, Sydney, New South Wales, Australia
| | - Amanda Corley
- The Prince Charles Hospital, Critical Care Research Group and Adult Intensive Care Services, Brisbane, Queensland, Australia
| | - Arne Diehl
- Department of Intensive Care and Hyperbaric Medicine, The Alfred Hospital and School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Eileen Gilder
- Cardiothoracic and Vascular Intensive Care Unit, Auckland City Hospital, Auckland, New Zealand
| | - Bianca J. Levkovich
- Experiential Development and Graduate Education and Centre for Medicines Use and Safety, Faculty of Pharmacy and Pharmaceutical Sciences, Monash University, Melbourne, Victoria, Australia
| | - Shay McGuinness
- Cardiothoracic and Vascular Intensive Care Unit, Auckland City Hospital, Auckland, New Zealand
| | - Jenny Ordonez
- Faculty of Medicine, University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Queensland, Australia
| | - Rachael Parke
- Cardiothoracic and Vascular Intensive Care Unit, Auckland City Hospital, Auckland, New Zealand
- The University of Auckland, School of Nursing, Auckland, New Zealand
| | - Suzanne Parker
- Faculty of Medicine, University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Queensland, Australia
| | - Vincent Pellegrino
- Department of Intensive Care and Hyperbaric Medicine, The Alfred Hospital and School of Public Health and Preventive Medicine, Monash University, Melbourne, Victoria, Australia
| | - Claire Reynolds
- Department of Intensive Care Medicine, St. Vincent’s Hospital, Sydney, New South Wales, Australia
| | - Sam Rudham
- Department of Intensive Care Medicine, St. Vincent’s Hospital, Sydney, New South Wales, Australia
| | - Steven C. Wallis
- Faculty of Medicine, University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Queensland, Australia
| | - Susan A. Welch
- Department of Pharmacy, St. Vincent’s Hospital, Sydney, New South Wales, Australia
| | - John F. Fraser
- The Prince Charles Hospital, Critical Care Research Group and Adult Intensive Care Services, Brisbane, Queensland, Australia
- Faculty of Medicine, The University of Queensland, Brisbane, Queensland, Australia
- Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Queensland, Australia
| | - Kiran Shekar
- The Prince Charles Hospital, Critical Care Research Group and Adult Intensive Care Services, Brisbane, Queensland, Australia
- Faculty of Health, Queensland University of Technology, Brisbane, Queensland, Australia
- Faculty of Health Sciences and Medicine, Bond University, Gold Coast, Queensland, Australia
| | - Jason A. Roberts
- Faculty of Medicine, University of Queensland Centre for Clinical Research (UQCCR), The University of Queensland, Brisbane, Queensland, Australia
- Department of Intensive Care Medicine and Pharmacy, Royal Brisbane and Women’s Hospital, Brisbane, Queensland, Australia
- Division of Anaesthesiology Critical Care Emergency and Pain Medicine, Nîmes University Hospital, University of Montpellier, Nîmes, France
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Novy E, Roger C, Roberts JA, Cotta MO. Pharmacokinetic and pharmacodynamic considerations for antifungal therapy optimisation in the treatment of intra-abdominal candidiasis. Crit Care 2023; 27:449. [PMID: 37981676 PMCID: PMC10659066 DOI: 10.1186/s13054-023-04742-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 11/14/2023] [Indexed: 11/21/2023] Open
Abstract
Intra-abdominal candidiasis (IAC) is one of the most common of invasive candidiasis observed in critically ill patients. It is associated with high mortality, with up to 50% of deaths attributable to delays in source control and/or the introduction of antifungal therapy. Currently, there is no comprehensive guidance on optimising antifungal dosing in the treatment of IAC among the critically ill. However, this form of abdominal sepsis presents specific pharmacokinetic (PK) alterations and pharmacodynamic (PD) challenges that risk suboptimal antifungal exposure at the site of infection in critically ill patients. This review aims to describe the peculiarities of IAC from both PK and PD perspectives, advocating an individualized approach to antifungal dosing. Additionally, all current PK/PD studies relating to IAC are reviewed in terms of strength and limitations, so that core elements for the basis of future research can be provided.
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Affiliation(s)
- Emmanuel Novy
- University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine, The University of Queensland, Royal Brisbane & Women's Hospital Campus Herston, Brisbane, QLD, 4029, Australia
- Department of Anaesthesiology, Critical Care and Peri-Operative Medicine, University Hospital of Nancy, Nancy, France
- Université de Lorraine, SIMPA, 54500, Nancy, France
| | - Claire Roger
- Department of Anesthesiology, Critical Care, Pain and Emergency Medicine, Nimes University Hospital, Place du Professeur Robert Debré, 30029, Nîmes Cedex 9, France
- UR UM103 IMAGINE, Univ Montpellier, Montpellier, France
| | - Jason A Roberts
- University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine, The University of Queensland, Royal Brisbane & Women's Hospital Campus Herston, Brisbane, QLD, 4029, Australia.
- Department of Anesthesiology, Critical Care, Pain and Emergency Medicine, Nimes University Hospital, Place du Professeur Robert Debré, 30029, Nîmes Cedex 9, France.
- Department of Intensive Care Medicine and Pharmacy, Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia.
- Herston Infectious Diseases Institute (HeIDI), Metro North Health, Brisbane, Australia.
| | - Menino Osbert Cotta
- University of Queensland Centre for Clinical Research (UQCCR), Faculty of Medicine, The University of Queensland, Royal Brisbane & Women's Hospital Campus Herston, Brisbane, QLD, 4029, Australia
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