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Peng L, Gao Y, Zhang G, Tian X, Xu H, Yu Q, Cheng J, Li Y, Li Q, Chen Y, Zhao W, Luo Z. Effects of continuous venovenous hemofiltration on vancomycin trough concentrations in critically ill children. ANNALS OF TRANSLATIONAL MEDICINE 2021; 9:224. [PMID: 33708851 PMCID: PMC7940948 DOI: 10.21037/atm-20-4005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Background Vancomycin trough concentrations are associated with clinical outcomes and drug adverse effects. This study investigates the effects of continuous venovenous hemofiltration (CVVH) on vancomycin trough concentrations in critically ill children with a vancomycin dosage of 40–60 mg/kg/day. Methods Children with steady-state vancomycin trough concentrations admitted to the pediatric intensive care unit (PICU) between January 2016 and December 2019 were retrospectively enrolled. Patients were divided into CVVH and non-CVVH groups according to treatment differences and renal function. Vancomycin trough concentrations were then compared between the groups, and risk factors for supratherapeutic trough concentrations (>20 mg/L) were analyzed with logistic regression. Results Of the 119 patients included, 35 were enrolled in the CVVH group and 84 in the non-CVVH group. Median vancomycin trough concentrations were significantly higher in the CVVH group than those in the non-CVVH group [14.9 (IQR =9.6–19.6) vs. 9.3 (IQR =7.0–13.4), P<0.001] and the proportion of therapeutic trough concentrations (10–20 mg/L) was similar between CVVH and non-CVVH groups (54.3% vs. 39.3%, P=0.133). However, CVVH therapy patients had a significantly higher proportion of supratherapeutic trough concentrations (20.0% vs. 1.2%, P=0.001) compared to the non-CVVH group. Multivariate analysis demonstrated that the Pediatric Risk of Mortality (PRISM) III score ≥28 (OR =13.7; 95% CI, 1.4–137.0; P=0.026] was an independent risk factor for supratherapeutic trough concentrations in critically ill patients. Conclusions CVVH therapy affects vancomycin trough concentrations and is associated with supratherapeutic concentrations with a 40–60 mg/kg/day vancomycin dosage. PRISM III scores ≥28 may serve as an independent risk factor for supratherapeutic trough concentrations in children receiving CVVH therapy.
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Affiliation(s)
- Lengyue Peng
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Yawen Gao
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Guangli Zhang
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Xiaoyin Tian
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Huiting Xu
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Qinghong Yu
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Jie Cheng
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Yuanyuan Li
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Qinyuan Li
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Yingfu Chen
- Department of Pediatric Intensive Care Unit Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
| | - Wei Zhao
- Department of Clinical Pharmacy, School of Pharmaceutical Sciences, Shandong University, Jinan, China
| | - Zhengxiu Luo
- Department of Respiratory Medicine Children's Hospital of Chongqing Medical University, National Clinical Research Center for Child Health and Disorders, Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing Key Laboratory of Pediatrics, Chongqing, China
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Lin Z, Chen DY, Zhu YW, Jiang ZL, Cui K, Zhang S, Chen LH. Population pharmacokinetic modeling and clinical application of vancomycin in Chinese patients hospitalized in intensive care units. Sci Rep 2021; 11:2670. [PMID: 33514803 PMCID: PMC7846798 DOI: 10.1038/s41598-021-82312-2] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2020] [Accepted: 01/18/2021] [Indexed: 11/19/2022] Open
Abstract
Management of vancomycin administration for intensive care units (ICU) patients remains a challenge. The aim of this study was to describe a population pharmacokinetic model of vancomycin for optimizing the dose regimen for ICU patients. We prospectively enrolled 466 vancomycin-treated patients hospitalized in the ICU, collected trough or approach peak blood samples of vancomycin and recorded corresponding clinical information from July 2015 to December 2017 at Tai Zhou Hospital of Zhejiang Province. The pharmacokinetics of vancomycin was analyzed by nonlinear mixed effects modeling with Kinetica software. Internal and external validation was evaluated by the maximum likelihood method. Then, the individual dosing regimens of the 92 patients hospitalized in the ICU whose steady state trough concentrations exceeded the target range (10–20 μg/ml) were adjusted by the Bayes feedback method. The final population pharmacokinetic model show that clearance rate (CL) of vancomycin will be raised under the conditions of dopamine combined treatment, severe burn status (Burn-S) and increased total body weight (TBW), but reduced under the conditions of increased serum creatinine (Cr) and continuous renal replacement therapy status; Meanwhile, the apparent distribution volume (V) of vancomycin will be enhanced under the terms of increased TBW, however decreased under the terms of increased age and Cr. The population pharmacokinetic parameters (CL and V) according to the final model were 3.16 (95%CI 2.83, 3.40) L/h and 60.71 (95%CI 53.15, 67.46). The mean absolute prediction error for external validation by the final model was 12.61% (95CI 8.77%, 16.45%). Finally, the prediction accuracy of 90.21% of the patients’ detected trough concentrations that were distributed in the target range of 10–20 μg/ml after dosing adjustment was found to be adequate. There is significant heterogeneity in the CL and V of vancomycin in ICU patients. The constructed model is sufficiently precise for the Bayesian dose prediction of vancomycin concentrations for the population of ICU Chinese patients.
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Affiliation(s)
- Zhong Lin
- Department of Clinical Pharmacy, Taizhou Hospital of Zhejiang Province Affiliated To Wenzhou Medical University, Ximen Street No. 150, Linhai, 317000, Zhejiang Province, China
| | - Dan-Yang Chen
- Rehabilitation Department, Taizhou Hospital of Zhejiang Province Affiliated To Wenzhou Medical University, Xi Men Street No. 150, Linhai, 317000, Zhejiang Province, China
| | - Yan-Wu Zhu
- Department of Clinical Pharmacy, Taizhou Hospital of Zhejiang Province Affiliated To Wenzhou Medical University, Ximen Street No. 150, Linhai, 317000, Zhejiang Province, China
| | - Zheng-Li Jiang
- Department of Clinical Pharmacy, Taizhou Hospital of Zhejiang Province Affiliated To Wenzhou Medical University, Ximen Street No. 150, Linhai, 317000, Zhejiang Province, China
| | - Ke Cui
- Intensive Care Unit, Taizhou Hospital of Zhejiang Province Affiliated To Wenzhou Medical University, Xi Men Street No. 150, Linhai, 317000, Zhejiang Province, China
| | - Sheng Zhang
- Intensive Care Unit, Taizhou Hospital of Zhejiang Province Affiliated To Wenzhou Medical University, Xi Men Street No. 150, Linhai, 317000, Zhejiang Province, China
| | - Li-Hua Chen
- Public Scientific Research Platform, Taizhou Hospital of Zhejiang Province Affiliated To Wenzhou Medical University, Xi Men Street No. 150, Linhai, 317000, Zhejiang Province, China.
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Hoff BM, Maker JH, Dager WE, Heintz BH. Antibiotic Dosing for Critically Ill Adult Patients Receiving Intermittent Hemodialysis, Prolonged Intermittent Renal Replacement Therapy, and Continuous Renal Replacement Therapy: An Update. Ann Pharmacother 2019; 54:43-55. [PMID: 31342772 DOI: 10.1177/1060028019865873] [Citation(s) in RCA: 67] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Objective: To summarize current antibiotic dosing recommendations in critically ill patients receiving intermittent hemodialysis (IHD), prolonged intermittent renal replacement therapy (PIRRT), and continuous renal replacement therapy (CRRT), including considerations for individualizing therapy. Data Sources: A literature search of PubMed from January 2008 to May 2019 was performed to identify English-language literature in which dosing recommendations were proposed for antibiotics commonly used in critically ill patients receiving IHD, PIRRT, or CRRT. Study Selection and Data Extraction: All pertinent reviews, selected studies, and references were evaluated to ensure appropriateness for inclusion. Data Synthesis: Updated empirical dosing considerations are proposed for antibiotics in critically ill patients receiving IHD, PIRRT, and CRRT with recommendations for individualizing therapy. Relevance to Patient Care and Clinical Practice: This review defines principles for assessing renal function, identifies RRT system properties affecting drug clearance and drug properties affecting clearance during RRT, outlines pharmacokinetic and pharmacodynamic dosing considerations, reviews pertinent updates in the literature, develops updated empirical dosing recommendations, and highlights important factors for individualizing therapy in critically ill patients. Conclusions: Appropriate antimicrobial selection and dosing are vital to improve clinical outcomes. Dosing recommendations should be applied cautiously with efforts to consider local epidemiology and resistance patterns, antibiotic dosing and infusion strategies, renal replacement modalities, patient-specific considerations, severity of illness, residual renal function, comorbidities, and patient response to therapy. Recommendations provided herein are intended to serve as a guide in developing and revising therapy plans individualized to meet a patient's needs.
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Affiliation(s)
- Brian M Hoff
- Northwestern Memorial Hospital, Chicago, IL, USA
| | - Jenana H Maker
- University of the Pacific Thomas J. Long School of Pharmacy and Health Sciences, Stockton, CA, USA.,University of California Davis Medical Center, Sacramento, CA, USA
| | - William E Dager
- University of California Davis Medical Center, Sacramento, CA, USA
| | - Brett H Heintz
- University of Iowa College of Pharmacy, Iowa City, IA, USA.,Iowa City Veterans Affairs (VA) Health Care System, Iowa City, IA, USA
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Sin JH, Newman K, Elshaboury RH, Yeh DD, de Moya MA, Lin H. Prospective evaluation of a continuous infusion vancomycin dosing nomogram in critically ill patients undergoing continuous venovenous haemofiltration. J Antimicrob Chemother 2018; 73:199-203. [PMID: 29040561 DOI: 10.1093/jac/dkx356] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Accepted: 08/31/2017] [Indexed: 11/14/2022] Open
Abstract
Objectives The most optimal method of attaining therapeutic vancomycin concentrations during continuous venovenous haemofiltration (CVVH) remains unclear. Studies have shown continuous infusion vancomycin (CIV) achieves target concentrations more rapidly and consistently when compared with intermittent infusion. Positive correlations between CVVH intensity and vancomycin clearance (CLvanc) have been noted. This study is the first to evaluate a CIV regimen in patients undergoing CVVH that incorporates weight-based CVVH intensity (mL/kg/h) into the dosing nomogram. Methods This was a prospective, observational study of patients undergoing CVVH and receiving CIV based on the nomogram. The primary outcome was achievement of a therapeutic vancomycin concentration (15-25 mg/L) at 24 h. Secondary outcomes included the achievement of therapeutic concentrations at 48 and 72 h. Results The nomogram was analysed in 52 critically ill adults. Vancomycin concentrations were therapeutic in 43/52 patients (82.7%) at 24 h. Of the nine patients who were not therapeutic at 24 h, seven were supratherapeutic and two were subtherapeutic. The mean (SD) concentration was 20.1 (4.2) mg/L at 24 h, 20.7 (3.7) mg/L at 48 h and 21.9 (3.5) mg/L at 72 h. Patients with CVVH intensity >20 mL/kg/h experienced higher CLvanc at 24 h compared with patients with CVVH intensity <20 mL/kg/h (3.1 versus 2.6 L/h; P = 0.013). Conclusions By incorporating CVVH intensity into the CIV dosing nomogram, the majority of patients achieved therapeutic concentrations at 24 h and maintained them within range at 48 and 72 h. Additional studies are required to validate this nomogram before widespread implementation may be considered.
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Affiliation(s)
- Jonathan H Sin
- Department of Pharmacy, Massachusetts General Hospital, Boston, MA, USA
| | - Kelly Newman
- Department of Pharmacy, Massachusetts General Hospital, Boston, MA, USA
| | - Ramy H Elshaboury
- Department of Pharmacy, Massachusetts General Hospital, Boston, MA, USA
| | - D Dante Yeh
- Division of Trauma, Emergency Surgery and Surgical Critical Care, Massachusetts General Hospital, Boston, MA, USA
| | - Marc A de Moya
- Division of Trauma, Emergency Surgery and Surgical Critical Care, Massachusetts General Hospital, Boston, MA, USA
| | - Hsin Lin
- Department of Pharmacy, Massachusetts General Hospital, Boston, MA, USA
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Lee B, Kim SJ, Park JD, Park J, Jung AH, Jung SH, Choi YH, Kang HG, Ha IS, Cheong HI. Factors affecting serum concentration of vancomycin in critically ill oliguric pediatric patients receiving continuous venovenous hemodiafiltration. PLoS One 2018; 13:e0199158. [PMID: 29927988 PMCID: PMC6013195 DOI: 10.1371/journal.pone.0199158] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 06/02/2018] [Indexed: 12/02/2022] Open
Abstract
Vancomycin is known to be unintentionally eliminated by continuous renal replacement therapy, and the protein bound fraction of vancomycin is also known to be different in adults and children. However, there are only a few studies investigating the relationship between the dose of continuous venovenous hemodiafiltration (CVVHDF) parameters and serum concentration of vancomycin in pediatric patients. The aim of this study was to determine clinical and demographic parameters that significantly affect serum vancomycin concentrations. This retrospective cohort study was conducted at a pediatric intensive care unit in a tertiary university children’s hospital. Data from oliguric patients who underwent CVVHDF and vancomycin therapeutic drug monitoring were collected. The correlation between factors affecting serum concentration of vancomycin was analyzed using mixed effect model. A total of 177 serum samples undergoing vancomycin therapeutic drug monitoring were analyzed. The median age of study participants was 2.23 (interquartile range, 0.3–11.84) years, and 126 (71.19%) were male patients. Serum concentration of vancomycin decreased significantly as the effluent flow rate (EFR; P < 0.001), dialysate flow rate (DFR; P = 0.009), replacement fluid flow rate (RFFR; P = 0.008), the proportion of RFFR in the sum of DFR and RFFR (P = 0.025), and residual urine output increased. The adjusted R2 of the multivariate regression model was 0.874 (P < 0.001) and the equation was as follows: Vancomycin trough level (mg/L) = (0.283 × daily dose of vancomycin [mg/kg/d]) + (365.139 / EFR [mL/h/kg])–(15.842 × residual urine output [mL/h/kg]). This study demonstrated that the serum concentration of vancomycin was associated with EFR, DFR, RFFR, the proportion of RFFR, and residual urine output in oliguric pediatric patients receiving CVVHDF.
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Affiliation(s)
- Bongjin Lee
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Pediatrics, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Soo Jung Kim
- Department of Pharmacy, Seoul National University Hospital, Seoul, Republic of Korea
| | - June Dong Park
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
- * E-mail:
| | - Jiun Park
- Department of Pharmacy, Seoul National University Hospital, Seoul, Republic of Korea
| | - Ae Hee Jung
- Department of Pharmacy, Seoul National University Hospital, Seoul, Republic of Korea
| | - Sun Hoi Jung
- Department of Pharmacy, Seoul National University Hospital, Seoul, Republic of Korea
| | - Yu Hyeon Choi
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hee Gyung Kang
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Il Soo Ha
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hae Il Cheong
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
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Connor MJ, Karakala N. Continuous Renal Replacement Therapy: Reviewing Current Best Practice to Provide High-Quality Extracorporeal Therapy to Critically Ill Patients. Adv Chronic Kidney Dis 2017; 24:213-218. [PMID: 28778360 DOI: 10.1053/j.ackd.2017.05.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Continuous renal replacement therapy (CRRT) use continues to expand globally. Despite improving technology, CRRT remains a complex intervention. Delivery of high-quality CRRT requires close collaboration of a multidisciplinary team including members of the critical care medicine, nephrology, nursing, pharmacy, and nutrition support teams. While significant gaps in medical evidence regarding CRRT persist, the growing evidence base supports evolving best practice and consensus to define high-quality CRRT. Unfortunately, there is wide variability in CRRT operating characteristics and limited uptake of these best practices. This article will briefly review the current best practice on important aspects of CRRT delivery including CRRT dose, anticoagulation, dialysis vascular access, fluid management, and drug dosing in CRRT.
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Omrani AS, Mously A, Cabaluna MP, Kawas J, Albarrak MM, Alfahad WA. Vancomycin therapy in critically ill patients on continuous renal replacement therapy; are we doing enough? Saudi Pharm J 2014; 23:327-9. [PMID: 26106281 PMCID: PMC4475842 DOI: 10.1016/j.jsps.2014.08.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2014] [Accepted: 08/27/2014] [Indexed: 12/04/2022] Open
Abstract
Background Recommendations regarding vancomycin dosing and monitoring in critically ill patients on continuous renal replacement therapy (CRRT) are limited. This is a retrospective study to assess the adequacy of current vancomycin dosing and monitoring practice for patients on CRRT in a tertiary hospital in Riyadh, Saudi Arabia. Methods A retrospective chart review of adult patients admitted between 1 April 2011 and 30 March 2013 to critical care and received intravenous vancomycin therapy whilst on CRRT was performed. Results A total of 68 patients received intravenous vancomycin therapy whilst on CRRT, of which 32 met the inclusion criteria. Fifty-one percent were males and median (range) age was 62.5 (19 – 90) years. Median APACHE II score was 33.5 (22–43) and median Charlson Comorbidity Score was 4 (0–8). The mean (± standard deviation) dose of vancomycin was 879.9 mg (± 281.2 mg) for an average duration of 5.9 days (± 3.7 days). All patients received continuous veno-venous haemofiltration (CVVH). A total of 55 vancomycin level readings were available from the study population, ranging from 6.6 to 41.3, with wide variations within the same sampling time frames. Vancomycin levels of > 15 mg/L or were achieved at least once in 24 patients (75.0%), but only 11 patients (34.3%) had 2 or more serum vancomycin level readings of 15 mg/L or more. Conclusion Therapeutic vancomycin levels are difficult to maintain in critically ill patients who are receiving IV vancomycin therapy whilst on CRRT. Aggressive dosing schedules and frequent monitoring are required to ensure adequate vancomycin therapy in this setting.
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Affiliation(s)
- Ali S. Omrani
- Division of Infectious Diseases, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
- Corresponding author. Address: Division of Infectious Diseases, Prince Sultan Military Medical City, PO Box 250955, Riyadh, 11391, Saudi Arabia. Tel.: +966 11 4777714x40693; fax: +966 11 4756711.
| | - Alaa Mously
- Department of Pharmacy, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Marylie P. Cabaluna
- Department of Critical Care, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - John Kawas
- Department of Critical Care, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Mohammed M. Albarrak
- Department of Critical Care, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
| | - Wafa A. Alfahad
- Department of Pharmacy, Prince Sultan Military Medical City, Riyadh, Saudi Arabia
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Escobar L, Andresen M, Downey P, Gai MN, Regueira T, Bórquez T, Lipman J, Roberts JA. Population pharmacokinetics and dose simulation of vancomycin in critically ill patients during high-volume haemofiltration. Int J Antimicrob Agents 2014; 44:163-7. [PMID: 24837847 DOI: 10.1016/j.ijantimicag.2014.03.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Accepted: 03/23/2014] [Indexed: 01/24/2023]
Abstract
This study aimed to describe the population pharmacokinetics of vancomycin in critically ill patients with refractory septic shock undergoing continuous venovenous high-volume haemofiltration (HVHF) and to define appropriate dosing for these patients. This was a prospective pharmacokinetic study in the ICU of a university hospital. Eight blood samples were taken over one vancomycin dosing interval. Samples were analysed by a validated liquid chromatography-tandem mass spectrometry assay. Non-linear mixed-effects modelling was used to describe the population pharmacokinetics. Dosing simulations were used to define therapeutic vancomycin doses for different HVHF settings. Nine patients were included (five male). The mean weight and SOFA score were 70 kg and 11, respectively. Mean HVHF settings were: blood flow rate, 240 mL/min; and haemofiltration exchange rate, 100 mL/kg/h. A linear two-compartment model with zero-order input adequately described the data. Mean parameter estimates were: clearance, 2.9 L/h; volume of distribution of central compartment (V(1)), 11.8L; volume of distribution of peripheral compartment (V(2)), 18.0 L; and intercompartmental clearance, 9.3 L/h. HVHF intensity was strongly associated with vancomycin clearance (P < 0.05) and was a covariate in the final model. Simulations indicate that after a loading dose, vancomycin doses required for different HVHF intensities would be 750 mg every 12h (q12h) for 69 mL/kg/h, 1000 mg q12h for 100 mL/kg/h and 1500 mg q12h for 123 mL/kg/h. Continuous infusion would also be a valuable administration strategy. In conclusion, variable and much higher than standard vancomycin doses are required to achieve therapeutic concentrations during different HVHF settings.
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Affiliation(s)
- Leslie Escobar
- Faculty of Chemical and Pharmaceutical Sciences, University of Chile, Santos Dumont 964, Santiago, Chile
| | - Max Andresen
- Department of Intensive Care Medicine, Hospital Clínico Universidad Católica de Chile, Marcoleta 347, Santiago 8330024, Chile.
| | - Patricio Downey
- Department of Nephrology, Hospital Clínico Universidad Católica de Chile, Marcoleta 347, Santiago, Chile
| | - Maria Nella Gai
- Faculty of Chemical and Pharmaceutical Sciences, University of Chile, Santos Dumont 964, Santiago, Chile
| | - Tomás Regueira
- Department of Intensive Care Medicine, Hospital Clínico Universidad Católica de Chile, Marcoleta 347, Santiago 8330024, Chile
| | - Tamara Bórquez
- Department of Nephrology, Hospital Clínico Universidad Católica de Chile, Marcoleta 347, Santiago, Chile
| | - Jeffrey Lipman
- Burns, Trauma and Critical Care Research Centre, The University of Queensland, Brisbane, QLD, Australia
| | - Jason A Roberts
- Burns, Trauma and Critical Care Research Centre, The University of Queensland, Brisbane, QLD, Australia; Royal Brisbane and Women's Hospital, Brisbane, QLD, Australia
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