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Oda K. Development of Novel Dosing Strategy According to the Area under the Concentration-Time Curve for Vancomycin. YAKUGAKU ZASSHI 2022; 142:1185-1190. [DOI: 10.1248/yakushi.22-00131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Kazutaka Oda
- Department of Pharmacy, Kumamoto University Hospital
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Stahl K, Bode C, David S. Extrakorporale Behandlungsstrategien der Sepsis. TRANSFUSIONSMEDIZIN 2022. [DOI: 10.1055/a-1557-3201] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Zusammenfassung
Hintergrund Die Mortalität der Sepsis bleibt auch im 21. Jahrhundert sehr hoch. Verschiedene adjuvante Strategien zur extrakorporalen Zytokinelimination wurden als zusätzliche
therapeutische Maßnahmen bei Sepsis und septischem Schock untersucht.
Ziele Zusammenfassung einer Auswahl extrakorporaler Blutreinigungstechniken und der aktuellen Erkenntnisse in der klinischen Anwendung mit besonderem Schwerpunkt auf dem
therapeutischen Plasmaaustausch.
Methoden Nicht systematische Literaturrecherche.
Ergebnisse Verschiedene extrakorporale Blutreinigungstechniken mit unterschiedlichen Evidenzniveaus hinsichtlich Zytokinelimination, Verbesserung der Hämodynamik und Verringerung der
Mortalität werden derzeit klinisch eingesetzt. Die am ausführlichsten untersuchten Modalitäten umfassen die hochvolumige Hämofiltration/Dialyse mit und ohne High-Cut-off-Filter sowie
Hämoadsorptionstechniken (einschließlich CytoSorb- und Polymyxin-B-Filter). Trotz teilweise ermutigender Beobachtungen bezüglich der Entfernung proinflammatorischer Zytokine und verbesserten
Hämodynamik zeigten randomisierte Outcome-Studien bislang keinen positiven Einfluss auf das Überleben. Aufgrund der Verwendung von Spenderplasma als Substitutionsflüssigkeit stellt der
therapeutische Plasmaaustausch das einzige Verfahren dar, das neben einer reinen Elimination zusätzlich verbrauchte protektive Faktoren ersetzen kann.
Schlussfolgerungen Die Anwendung extrakorporaler Blutreinigungsmethoden kann für Sepsispatienten außerhalb klinischer Studien bisher nicht empfohlen werden, da derzeit keine Beweise
für ihre Wirksamkeit vorliegen. Zukünftige Untersuchungen sollten darauf abzielen, das Patientenkollektiv hinsichtlich des klinischen Schweregrads, des Zeitpunkts der Intervention und
verschiedener inflammatorischer (Sub-)Phänotypen zu homogenisieren.
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Affiliation(s)
- Klaus Stahl
- Abteilung für Gastroenterologie, Hepatologie und Endokrinologie, Medizinische Hochschule Hannover, Deutschland
| | - Christian Bode
- Klinik für Anästhesie und operative Intensivmedizin, Universitätsklinikum Bonn, Deutschland
| | - Sascha David
- Abteilung für Nieren- und Hochdruckerkrankungen, Medizinische Hochschule Hannover & Institut für Intensivmedizin, Universitätsspital Zürich, Schweiz
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Jang SM, Shaw AR, Mueller BA. Size Matters: The Influence of Patient Size on Antibiotics Exposure Profiles in Critically Ill Patients on Continuous Renal Replacement Therapy. Antibiotics (Basel) 2021; 10:antibiotics10111390. [PMID: 34827327 PMCID: PMC8615189 DOI: 10.3390/antibiotics10111390] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 11/02/2021] [Accepted: 11/08/2021] [Indexed: 11/20/2022] Open
Abstract
(1) Purpose of this study: To determine whether patient weight influences the probability of target attainment (PTA) over 72 h of initial therapy with beta-lactam (cefepime, ceftazidime, piperacillin/tazobactam) and carbapenem (imipenem, ertapenem, meropenem) antibiotics in the critical care setting. This is the first paper to address the question of whether patient size affects antibiotic PTA in the ICU. (2) Methods: We performed a post hoc analysis of Monte Carlo simulations conducted in virtual critically ill patients receiving antibiotics and continuous renal replacement therapy. The PTA was calculated for each antibiotic on the following pharmacodynamic (PD) targets: (a) were above the target organism’s minimum inhibitory concentration (≥%fT≥1×MIC), (b) were above four times the MIC (≥%fT≥4×MIC), and (c) were always above the MIC (≥100%fT≥MIC) for the first 72 h of antibiotic therapy. The PTA was analyzed in patient weight quartiles [Q1 (lightest)-Q4 (heaviest)]. Optimal doses were defined as the lowest dose achieving ≥90% PTA. (3) Results: The PTA for fT≥1×MIC led to similarly high rates regardless of weight quartiles. Yet, patient weight influenced the PTA for higher PD targets (100%fT≥MIC and fT≥4×MIC) with commonly used beta-lactams and carbapenems. Reaching the optimal PTA was more difficult with a PD target of 100%fT≥MIC compared to fT≥4×MIC. (4) Conclusions: The Monte Carlo simulations showed patients in lower weight quartiles tended to achieve higher antibiotic pharmacodynamic target attainment compared to heavier patients.
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Affiliation(s)
- Soo-Min Jang
- Department of Pharmacy Practice, Loma Linda University School of Pharmacy, Loma Linda, CA 92350, USA
- Correspondence:
| | - Alex R. Shaw
- Medical Strategist, Ironwood Pharmaceuticals, Boston, MA 02110, USA;
| | - Bruce A. Mueller
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, MI 48109, USA;
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Jang SM, Awdishu L. Drug dosing considerations in continuous renal replacement therapy. Semin Dial 2021; 34:480-488. [PMID: 33939855 DOI: 10.1111/sdi.12972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 02/23/2021] [Accepted: 03/19/2021] [Indexed: 12/24/2022]
Abstract
Acute kidney injury (AKI) is a common complication in critically ill patients, which is associated with increased in-hospital mortality. Delivering effective antibiotics to treat patients with sepsis receiving continuous renal replacement therapy (RRT) is complicated by variability in pharmacokinetics, dialysis delivery, lack of primary literature, and therapeutic drug monitoring. Pharmacokinetic alterations include changes in absorption, distribution, protein binding (PB), metabolism, and renal elimination. Drug absorption may be significantly changed due to alterations in gastric pH, perfusion, gastrointestinal motility, and intestinal atrophy. Volume of distribution for hydrophilic drugs may be increased due to volume overload. Estimation of renal clearance is challenged by the effective delivery of RRT. Drug characteristics such as PB, volume of distribution, and molecular weight impact removal of the drug by RRT. The totality of these alterations leads to reduced exposure. Despite our best knowledge, therapeutic drug monitoring of patients receiving continuous RRT demonstrates wide variability in antimicrobial concentrations, highlighting the need for expanded monitoring of all drugs. This review article will focus on changes in drug pharmacokinetics in AKI and dosing considerations to attain antibiotic pharmacodynamic targets in critically ill patients receiving continuous RRT.
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Affiliation(s)
- Soo Min Jang
- Department of Pharmacy Practice, Loma Linda University School of Pharmacy, Loma Linda, CA, USA
| | - Linda Awdishu
- Clinical Pharmacy, UC San Diego Skaggs School of Pharmacy and Pharmaceutical Sciences, La Jolla, CA, USA
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Körtge A, Majcher-Peszynska J, Heskamp B, Wasserkort R, Mitzner S. Antibiotics Removal by Continuous Venovenous Hemofiltration with a Novel Asymmetric Triacetate Membrane Hemofilter: An in vitro Study. Blood Purif 2021; 50:899-905. [PMID: 33631754 DOI: 10.1159/000513417] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 11/17/2020] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Continuous renal replacement therapies (CRRTs) are essential in the treatment of critically ill patients with acute kidney injury and are also discussed as a supporting sepsis therapy. CRRT can affect antibiotics plasma concentrations. OBJECTIVE The effect of continuous venovenous hemofiltration (CVVH) with an asymmetric triacetate (ATA) membrane hemofilter on concentrations of antibiotics with low (meropenem), medium (vancomycin), and high (daptomycin) protein binding (PB) was investigated. METHODS 1 L human whole blood supplemented with antibiotics was recirculated and filtrated for 6 h in vitro. Clearances and sieving coefficients (SC) were determined from antibiotics concentrations measured at filter inlet, outlet, and filtrate side. Reservoir concentration data were fitted using a first-order kinetic model. RESULTS Meropenem and vancomycin concentrations decreased to 5-10% of the initial plasma level, while only 50% of daptomycin were removed. Clearances and SCs were (10.8 [10.8-17.4] mL/min, SC = 0.72 [0.72-1.16]) for meropenem, (13.4 [12.3-13.7] mL/min, 0.89 [0.82-0.92]) for vancomycin, and (2.1 [1.8-2.1] mL/min, 0.14 [0.12-0.14]) for daptomycin. Removal by adsorption was negligible. CONCLUSIONS The clearances and SCs presented are comparable with findings of other authors. Meropenem and vancomycin, which exhibit low and medium PB, respectively, were strongly removed, while considerably less daptomycin was removed because of its high PB. Our results suggest that in clinical use of the tested antibiotics during CRRT with the ATA hemofilter, the same factors have to be considered for determining the dosing strategy as with filters with other commonly applied membrane materials.
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Affiliation(s)
- Andreas Körtge
- Department of Extracorporeal Immunomodulation EXIM, Fraunhofer Institute for Cell Therapy and Immunology IZI, Rostock, Germany, .,Division of Nephrology, Centre for Internal Medicine, University Medicine Rostock, Rostock, Germany,
| | | | - Benjamin Heskamp
- Department of Extracorporeal Immunomodulation EXIM, Fraunhofer Institute for Cell Therapy and Immunology IZI, Rostock, Germany.,Division of Nephrology, Centre for Internal Medicine, University Medicine Rostock, Rostock, Germany
| | - Reinhold Wasserkort
- Department of Extracorporeal Immunomodulation EXIM, Fraunhofer Institute for Cell Therapy and Immunology IZI, Rostock, Germany.,Division of Nephrology, Centre for Internal Medicine, University Medicine Rostock, Rostock, Germany
| | - Steffen Mitzner
- Department of Extracorporeal Immunomodulation EXIM, Fraunhofer Institute for Cell Therapy and Immunology IZI, Rostock, Germany.,Division of Nephrology, Centre for Internal Medicine, University Medicine Rostock, Rostock, Germany
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Development of Vancomycin Dose Individualization Strategy by Bayesian Prediction in Patients Receiving Continuous Renal Replacement Therapy. Pharm Res 2020; 37:108. [PMID: 32468340 DOI: 10.1007/s11095-020-02820-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 04/07/2020] [Indexed: 01/31/2023]
Abstract
PURPOSE Vancomycin (VCM) concentration is often out of therapeutic range (10-20 μg/ml) in patients receiving continuous renal replacement therapy (CRRT). The purposes of this study were to develop a practical VCM population pharmacokinetic (PPK) model and to evaluate the potential of Bayesian prediction-based therapeutic drug monitoring (Bayes-TDM) in VCM dose individualization for patients receiving CRRT. METHODS We developed a VCM PPK model using 80 therapeutic concentrations in 17 patients receiving CRRT. Bayes-TDM with the VCM PPK model was evaluated in 23 patients after PPK modeling. RESULTS We identified the covariates reduced urine output (RUO, <0.5 ml/kg/h) and effluent flow rate of CRRT for the VCM PPK model. The mean VCM non CRRT clearance (CLnonCRRT) was 2.12 l/h. RUO lowered CLnonCRRT to 0.34 l/h. The volume of distribution was 91.3 l/70 kg. The target concentration attainment rate by Bayes-TDM was higher (87.0%) than that by the PPK modeling period (53.8%, P = 0.046). The variance of the second measured concentrations by the Bayes-TDM was lower (11.5, standard deviation: 3.4 μg/ml) than that by the PPK modeling period (50.5, standard deviation: 7.1 μg/ml, P = 0.003). CONCLUSIONS Bayes-TDM could be a useful tool for VCM dose individualization in patients receiving CRRT.
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Antibiotic Exposure Profiles in Trials Comparing Intensity of Continuous Renal Replacement Therapy. Crit Care Med 2020; 47:e863-e871. [PMID: 31397714 DOI: 10.1097/ccm.0000000000003955] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
OBJECTIVES To determine whether the probability of target attainment over 72 hours of initial therapy with beta-lactam (cefepime, ceftazidime, piperacillin/tazobactam) and carbapenem (imipenem, meropenem) antibiotics were substantially influenced between intensive and less-intensive continuous renal replacement therapy groups in the Acute Renal Failure Trial Network trial and The RENAL Replacement Therapy Study trial. DESIGN The probability of target attainment was calculated using pharmacodynamic targets of percentage of time that free serum concentrations (fT): 1) were above the target organism's minimum inhibitory concentration (≥ fT > 1 × minimum inhibitory concentration); 2) were above four times the minimum inhibitory concentration (≥ % fT > 4 × minimum inhibitory concentration); and 3) were always above the minimum inhibitory concentration (≥ 100% fT > minimum inhibitory concentration) for the first 72 hours of antibiotic therapy. Demographic data and effluent rates from the Acute Renal Failure Trial Network and RENAL Replacement Therapy Study trials were used. Optimal doses were defined as the dose achieving greater than or equal to 90% probability of target attainment. SETTING Monte Carlo simulations using demographic data from Acute Renal Failure Trial Network and RENAL Replacement Therapy Study trials. PATIENTS Virtual critically ill patients requiring continuous renal replacement therapy. INTERVENTIONS None. MEASUREMENTS AND MAIN RESULTS The pharmacodynamic target of fT greater than 1 × minimum inhibitory concentration led to similarly high rates of predicted response with antibiotic doses often used in continuous renal replacement therapy. Achieving 100% fT greater than minimum inhibitory concentration is a more stringent benchmark compared with T greater than 4 × minimum inhibitory concentration with standard antibiotic dosing. The intensity of effluent flow rates (less intensive vs intensive) did not substantially influence the probability of target attainment of antibiotic dosing regimens regardless of pharmacodynamic target. CONCLUSIONS Antibiotic pharmacodynamic target attainment rates likely were not meaningfully different in the low- and high-intensity treatment arms of the Acute Renal Failure Trial Network and RENAL Replacement Therapy Study Investigators trials.
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Lim SK, Lee SA, Kim CW, Kang E, Choi YH, Park I. High variability of teicoplanin concentration in patients with continuous venovenous hemodiafiltration. Hemodial Int 2019; 23:69-76. [PMID: 30714672 DOI: 10.1111/hdi.12704] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 08/09/2018] [Indexed: 12/29/2022]
Abstract
INTRODUCTION Continuous venovenous hemodiafiltration (CVVHDF) may alter teicoplanin pharmacokinetics and increase the risk of incorrect dosing. The objective of this prospective observational study was to assess the effect of CVVHDF on the pharmacokinetics of teicoplanin as maintenance therapy. METHODS Blood, urine, and dialysate samples were collected to measure teicoplanin levels. CVVHDF clearance (CLCVVHDF ), total clearance (CLTOTAL ), and volume of distribution (Vd) were calculated by simplex-linear modeling. The influence of CVVHDF dose on teicoplanin pharmacokinetics was assessed. FINDINGS Ten samples from eight patients were studied. Creatinine clearance was 3.4 ± 5.1 ml/min/1.73 m2 . Three patients were anuria. The dose for CVVHDF was 32.1 ± 7.0 mL/kg/h. Vd was 1.6 ± 0.7 L/kg. T1/2 was 100.1 ± 42.7 hours. CLTOTAL of teicoplanin was 11.9 ± 5.4 mL/min and CLCVVHDF was 5.8 ± 4.2 mL/min. Contribution of CLCVVHDF to CLTOTAL was 51.2% ± 23.6%. CLCVVHDF of individual teicoplanin varied widely. Large intra-occasion differences were also observed. Dose of CLCVVHDF did not influence overall CLTOTAL , Vd, or half-life. The proportion of CLTOTAL due to CLCVVHDF varied widely. It was high in some cases. DISCUSSION In patients receiving CVVHDF, there is great variability in teicoplanin pharmacokinetics which complicates empiric approach to dosing, suggesting the need for therapeutic drug monitoring.
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Affiliation(s)
- Seung K Lim
- Department of Infectious Disease, Ajou University School of Medicine, Suwon, South Korea
| | - Sun A Lee
- Department of Pharmacy, Ajou University Hospital, Suwon, South Korea
| | - Cheol-W Kim
- Department of Internal Medicine, Department of Clinical Phamacology, Inha University School of Medicine, Incheon, South Korea
| | - Eunjeong Kang
- Department of Nephrology, Ajou University School of Medicine, Suwon, South Korea
| | - Young H Choi
- Department of Infectious Disease, Ajou University School of Medicine, Suwon, South Korea
| | - Inwhee Park
- Department of Nephrology, Ajou University School of Medicine, Suwon, South Korea
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Jang SM, Hough G, Mueller BA. Ex vivo Rezafungin Adsorption and Clearance During Continuous Renal Replacement Therapy. Blood Purif 2018; 46:214-219. [PMID: 30048960 DOI: 10.1159/000489212] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2018] [Accepted: 04/12/2018] [Indexed: 12/14/2022]
Abstract
BACKGROUND/AIMS To determine adsorption and transmembrane clearances (CLTM) of rezafungin, a novel long-acting echinocandin, in continuous venovenous hemofiltration (CVVH). METHODS A validated ex vivo bovine blood CVVH model using polysulfone and AN69 hemodiafilters was used to evaluate urea and rezafungin CLTM at 3 different ultrafiltrate flow rates. Rezafungin adsorption to the CRRT apparatus was determined for each hemodiafilter. RESULTS The sieving coefficient (SC) from CVVH with 3 different ultrafiltrate flow rates was 0 for both HF1400 and Multiflow-150 hemodiafilters, while urea SC was approximately 1 at all flow rates. Hemodiafilter type and ultrafiltrate flow rate did not influence CLTM. Rezafungin adsorption to the CVVH apparatus was not observed for either hemodiafilter. CONCLUSION Rezafungin is not removed by CVVH by membrane adsorption or via CLTM. Ultrafiltrate flow rates and hemodiafilter types are unlikely to influence rezafungin CLTM. No dosage adjustment of rezafungin is likely required for critically ill patients receiving CVVH.
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Affiliation(s)
- Soo Min Jang
- Department of Pharmacy Practice, Loma Linda University School of Pharmacy, Loma Linda, California, USA
| | | | - Bruce A Mueller
- Department of Clinical Pharmacy, University of Michigan College of Pharmacy, Ann Arbor, Michigan, USA
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Abstract
Appropriate antibiotic dosing is critical to improve outcomes in critically ill patients with sepsis. The addition of continuous renal replacement therapy makes achieving appropriate antibiotic dosing more difficult. The lack of continuous renal replacement therapy standardization results in treatment variability between patients and may influence whether appropriate antibiotic exposure is achieved. The aim of this study was to determine if continuous renal replacement therapy effluent flow rate impacts attaining appropriate antibiotic concentrations when conventional continuous renal replacement therapy antibiotic doses were used. This study used Monte Carlo simulations to evaluate the effect of effluent flow rate variance on pharmacodynamic target attainment for cefepime, ceftazidime, levofloxacin, meropenem, piperacillin, and tazobactam. Published demographic and pharmacokinetic parameters for each antibiotic were used to develop a pharmacokinetic model. Monte Carlo simulations of 5000 patients were evaluated for each antibiotic dosing regimen at the extremes of Kidney Disease: Improving Global Outcomes guidelines recommended effluent flow rates (20 and 35 mL/kg/h). The probability of target attainment was calculated using antibiotic-specific pharmacodynamic targets assessed over the first 72 hours of therapy. Most conventional published antibiotic dosing recommendations, except for levofloxacin, reach acceptable probability of target attainment rates when effluent rates of 20 or 35 mL/kg/h are used.
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Lewis SJ, Mueller BA. Antibiotic Dosing in Patients With Acute Kidney Injury: "Enough But Not Too Much". J Intensive Care Med 2014; 31:164-76. [PMID: 25326429 DOI: 10.1177/0885066614555490] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2014] [Accepted: 08/25/2014] [Indexed: 12/21/2022]
Abstract
Increasing evidence suggests that antibiotic dosing in critically ill patients with acute kidney injury (AKI) often does not achieve pharmacodynamic goals, and the continued high mortality rate due to infectious causes appears to confirm these findings. Although there are compelling reasons why clinicians should use more aggressive antibiotic dosing, particularly in patients receiving aggressive renal replacement therapies, concerns for toxicity associated with higher doses are real. The presence of multisystem organ failure and polypharmacy predispose these patients to drug toxicity. This article examines the pharmacokinetic and pharmacodynamic consequences of critical illness, AKI, and renal replacement therapy and describes potential solutions to help clinicians give "enough but not too much" in these very complicated patients.
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Affiliation(s)
- Susan J Lewis
- Department of Clinical, Social, and Administrative Sciences, University of Michigan College of Pharmacy, Ann Arbor, MI, USA
| | - Bruce A Mueller
- Department of Clinical, Social, and Administrative Sciences, University of Michigan College of Pharmacy, Ann Arbor, MI, USA
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Lewis SJ, Mueller BA. Antibiotic Dosing in Critically Ill Patients Receiving CRRT: Underdosing is Overprevalent. Semin Dial 2014; 27:441-5. [DOI: 10.1111/sdi.12203] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Susan J. Lewis
- Department of Clinical Social and Administrative Sciences; University of Michigan College of Pharmacy; Ann Arbor Michigan
| | - Bruce A. Mueller
- Department of Clinical Social and Administrative Sciences; University of Michigan College of Pharmacy; Ann Arbor Michigan
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Medikamentendosierung unter extrakorporaler Therapie. Med Klin Intensivmed Notfmed 2014; 109:348-53. [DOI: 10.1007/s00063-014-0349-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Accepted: 04/01/2014] [Indexed: 10/25/2022]
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