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Vancomycin pharmacokinetics

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https://www.readbyqxmd.com/read/28625235/-pharmacokinetics-of-vancomycin-in-patients-with-severe-acute-pancreatitis-and-its-influencing-factors-analysis-of-7-years-data
#1
Juan He, Enqiang Mao, Feng Jing, Huiting Jiang, Wanhua Yang, Erzhen Chen
OBJECTIVE: To observe the change of the serum trough concentration and its pharmacokinetics of vancomycin in patients with severe acute pancreatitis (SAP), and to analyze the factors influencing vancomycin concentration. METHODS: A retrospective analysis was conducted. Steady-state trough concentrations of vancomycin from patients (18-80 years old) with SAP concomitantly with G(+) infection admitted to Intensive Care Unit (ICU) of Ruijin Hospital Affiliated to Shanghai Jiaotong University School of Medicine from January 2010 to December 2016 were enrolled...
June 2017: Zhonghua Wei Zhong Bing Ji Jiu Yi Xue
https://www.readbyqxmd.com/read/28617036/an-lc-ms-ms-method-to-determine-vancomycin-in-plasma-total-and-unbound-urine-and-renal-replacement-therapy-effluent
#2
Suzanne L Parker, Yarmarly C Guerra Valero, Jenny L Ordóñez Mejia, Claire Roger, Jeffrey Lipman, Jason A Roberts, Steven C Wallis
AIM: Critical illness and medical interventions, such as renal replacement therapy, can cause changes to vancomycin pharmacokinetics and lead to suboptimal dosing. To comprehensively characterize vancomycin pharmacokinetic a method must measure vancomycin in a range of clinical matrices. RESULTS: A LC-MS/MS method was developed using hydrophilic interaction liquid chromatography and microsample volumes, where possible. For all matrices, the linear concentration range was 1-100 μg/ml, interassay accuracy and precision was within 15%, and recovery above 80%...
June 15, 2017: Bioanalysis
https://www.readbyqxmd.com/read/28607023/pharmacokinetic-assessment-of-vancomycin-loading-dose-in-critically-ill-patients
#3
Osvaldo Álvarez, Jose Cristian Plaza-Plaza, Manuel Ramirez, Alexis Peralta, Cristián A Amador, Roberto Amador
Background: The vancomycin loading dose (LD) of 25-30 mg/kg is a frequently practiced strategy to achieve effective concentrations from the first-treatment dose. However, considering only the body weight for dosing might be inadequate in critically ill patients due to pharmacokinetics changes.Objective: Assess achieving optimal trough serum levels of vancomycin and AUC0-24/MIC in the first 24-hours of treatment, by using a LD based on population pharmacokinetic parameters of critically ill patients.Methods: We performed a concurrent cohort study over 22 months of patients with severe sepsis who received intravenous vancomycin...
June 12, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28532398/clinical-outcomes-of-linezolid-and-vancomycin-in-patients-with-nosocomial-pneumonia-caused-by-methicillin-resistant-staphylococcus-aureus-stratified-by-baseline-renal-function-a-retrospective-cohort-analysis
#4
Ping Liu, Blair Capitano, Amy Stein, Ali A El-Solh
BACKGROUND: The primary objective of this study is to assess whether baseline renal function impacts treatment outcomes of linezolid and vancomycin (with a dose-optimized regimen) for methicillin-resistant Staphylococcus aureus (MRSA) pneumonia. METHODS: We conducted a retrospective cohort analysis of data generated from a prospective, randomized, controlled clinical trial (NCT 00084266). The analysis included 405 patients with culture-proven MRSA pneumonia. Baseline renal function was stratified based on creatinine clearance...
May 22, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28529861/local-intra-wound-administration-of-powdered-antibiotics-in-orthopaedic-surgery
#5
REVIEW
Andrew N Fleischman, Matthew S Austin
Surgical site infection (SSI) is one of the most common complications after orthopaedic surgery, leading to significant morbidity and its associated costs. Surgical guidelines strongly recommend the use of systemic antibiotic prophylaxis to reduce the risk for developing SSI. Locally administered powdered antibiotics have the potential to provide remarkably high intra-wound concentrations without risk for systemic toxicity. However, a paucity of high quality evidence in the orthopaedic literature has prevented widespread adoption of this technique...
2017: Journal of bone and joint infection
https://www.readbyqxmd.com/read/28528396/penetration-of-vancomycin-into-the-cerebrospinal-fluid-a-systematic-review
#6
REVIEW
Jessica E Beach, Jerrold Perrott, Ricky D Turgeon, Mary H H Ensom
INTRODUCTION: Infectious disease and pharmacokinetic textbooks indicate that vancomycin has poor penetration into the central nervous system due to its hydrophilic nature and high molecular weight. Recent literature suggests that penetration of vancomycin into cerebrospinal fluid (CSF) is higher than previously reported; therefore, we conducted a systematic review to assess the penetration of vancomycin into CSF. METHODS: We searched the MEDLINE, EMBASE, and CENTRAL electronic databases for English-language human studies evaluating serum and CSF concentrations of intravenous vancomycin...
May 20, 2017: Clinical Pharmacokinetics
https://www.readbyqxmd.com/read/28527358/improving-the-pharmacokinetics-and-tissue-distribution-of-pyrinezolid-by-self-assembled-polymeric-micelles
#7
Haiyue Long, Xiaoling Li, Zitai Sang, Lan Mei, Tao Yang, Zicheng Li, Liangxue Zhou, Yu Zheng, Gu He, Gang Guo, Zhenling Wang, Yong Deng, Youfu Luo
Antibiotic-resistance by bacteria is a growing global concern within the healthcare field, and it has provided an impetus for continued antimicrobial development. Pyrinezolid (PZ), a novel oxazolidinone compound, can effectively inhibit most gram-positive bacteria, including methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant Enterococci (VRE). Though PZ is a promising antimicrobial candidate, the druggability of PZ is limited by its poor water solubility. Therefore, the amphipathic mPEG-PLLA copolymer was used to prepare the pyrinezolid micelles (PZ-M)...
May 8, 2017: Colloids and Surfaces. B, Biointerfaces
https://www.readbyqxmd.com/read/28515506/impact-of-pharmacy-practice-model-expansion-on-pharmacokinetic-services-optimization-of-vancomycin-dosing-and-improved-patient-safety
#8
Zhe Han, Natasha N Pettit, Emily M Landon, Benjamin D Brielmaier
Background: The impact of pharmacy interventions on optimizing vancomycin therapy has been described, however interventions vary among studies and the most optimal pharmacy practice model (PPM) for pharmacokinetic (PK) services has not been established. Objective: The purpose of this study is to demonstrate the value of 24 hours a day, 7 days a week (24/7) PK services. Methods: New PK services were implemented in 2 phases with institutional PPM expansion. Phase 1 included universal monitoring by pharmacists with recommendations made to prescribers during business hours...
April 2017: Hospital Pharmacy
https://www.readbyqxmd.com/read/28504034/a-simulation-of-loading-doses-for-vancomycin-continuous-infusion-regimens-in-intensive-care
#9
Martin Šíma, Karolína Hronová, Jan Hartinger, Ondřej Slanař
BACKGROUND: Delayed achievement of target vancomycin serum concentrations may adversely affect clinical outcomes. The objective of this retrospective study was to compare the prediction accuracy of different body weight descriptors for volume of distribution and to propose an optimal loading dose (LD) for continuous infusion regimens in adults. METHODS: Pharmacokinetic variables were computed using one-compartmental analysis. Simulated LDs of vancomycin were evaluated for each patient...
May 14, 2017: Infectious Diseases
https://www.readbyqxmd.com/read/28494340/simple-and-rapid-quantification-of-vancomycin-in-serum-urine-and-peritoneal-pleural-effusion-via-uhplc-ms-ms-applicable-to-personalized-antibiotic-dosing-research
#10
Lenka Javorska, Lenka Kujovska Krcmova, Petr Solich, Milan Kaska
Management of the therapy of life-threatening bacterial infection is extremely based on an optimal antibiotic treatment. Achieving the correct vancomycin dosage in blood and target tissues can be complicated in special situations, e.g., where large fluid sequestration and/or acute renal failure occur. A UHPLC-MS/MS method operating in electrospray (ESI) positive ion mode was applied for the determination of vancomycin in serum, urine and peritoneal/pleural effusion. Sample pretreatment was composed of dilution and simple protein precipitation where only a small volume (50μL) of serum, urine or peritoneal/pleural effusion was required...
May 2, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28481829/a-population-pharmacokinetic-analysis-to-study-the-effect-of-therapeutic-hypothermia-on-vancomycin-disposition-in-children-resuscitated-from-cardiac-arrest
#11
Nicole R Zane, Michael D Reedy, Marc R Gastonguay, Adam S Himebauch, Evan Z Ramsey, Alexis A Topjian, Athena F Zuppa
OBJECTIVES: Limited data exist on the effects of therapeutic hypothermia on renal function and pharmacokinetics in pediatric patients after cardiac arrest. The objective was to describe the differences in vancomycin disposition in pediatric patients following cardiac arrest treated with either therapeutic hypothermia or normothermia using population pharmacokinetic modeling. DESIGN: Single-center, retrospective cohort study. SETTING: A tertiary care hospital pediatric and cardiac ICU...
May 5, 2017: Pediatric Critical Care Medicine
https://www.readbyqxmd.com/read/28475731/evaluation-of-daptomycin-combinations-with-cephalosporins-or-gentamicin-against-streptococcus-mitis-group-strains-in-an-in-vitro-model-of-simulated-endocardial-vegetations-sevs
#12
Juwon Yim, Jordan R Smith, Nivedita B Singh, Seth Rice, Kyle Stamper, Cristina Garcia de la Maria, Arnold S Bayer, Nagendra N Mishra, José M Miró, Truc T Tran, Cesar A Arias, Paul Sullam, Michael J Rybak
Objectives: Among viridans group streptococcal infective endocarditis (IE), the Streptococcus mitis group is the most common aetiological organism. Treatment of IE caused by the S. mitis group is challenging due to the high frequency of β-lactam resistance, drug allergy and intolerability of mainstay antimicrobial agents such as vancomycin or gentamicin. Daptomycin has been suggested as an alternative therapeutic option in these scenarios based on its excellent susceptibility profile against S...
May 5, 2017: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/28416551/comparative-pharmacodynamics-of-telavancin-and-vancomycin-in-the-neutropenic-murine-thigh-and-lung-infection-models-against-staphylococcus-aureus
#13
Alexander J Lepak, Miao Zhao, David R Andes
The pharmacodynamics of telavancin and vancomycin were compared using neutropenic murine thigh and lung infection models. Four S. aureus strains were included. The telavancin MIC ranged from 0.06 - 0.25 mg/L and vancomycin MIC from 1 - 4 mg/L. Plasma pharmacokinetics of escalating doses (1.25, 5, 20 and 80 mg/kg) of telavancin and vancomycin were linear over the dose range. Epithelial lining fluid (ELF) pharmacokinetics for each drug revealed penetration into the ELF mirrored the percent free fraction (not protein bound) in plasma for each drug...
April 17, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28406088/population-pharmacokinetics-of-vancomycin-in%C3%A2-chinese-infants%C3%A2
#14
Xiao-Yan Sheng, Chao-Yang Chen, Ling-Yue Ma, Ya-Ou Liu, Ying Zhou, Yi-Min Cui
OBJECTIVE: To determine the pharmacokinetics (PK) of vancomycin in Chinese infant patients using a population pharmacokinetic (PKK) approach in order to provide support for individualized vancomycin therapy. METHOD: The data included 72 sets of steady-state peak and trough serum concentrations from 61 infants (0 - 1 years). PPK analysis was performed using the nonlinear mixed-effects modeling software. Inter- and intraindividual variability was estimated for the clearance and distribution volume of vancomycin...
April 13, 2017: International Journal of Clinical Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28401341/vancomycin-prophylaxis-for-total-joint-arthroplasty-incorrectly-dosed-and-has-a-higher-rate-of-periprosthetic-infection-than-cefazolin
#15
Michael M Kheir, Timothy L Tan, Ibrahim Azboy, Dean D Tan, Javad Parvizi
BACKGROUND: In total joint arthroplasty (TJA), vancomycin is used as perioperative antibiotic prophylaxis in patients with penicillin allergy or in patients colonized with methicillin-resistant Staphylococcus aureus (MRSA). Although vancomycin dosing should be weight-based (15 mg/kg), not all surgeons are aware of this; a fixed 1-g dose is instead frequently administered. QUESTIONS/PURPOSES: (1) Is there a difference in the risk of periprosthetic joint infection (PJI) in patients receiving vancomycin or cefazolin prophylaxis after primary TJA? (2) What proportion of patients is adequately dosed with vancomycin? (3) Compared with actual fixed dosing, does weight-based dosing result in a greater proportion of patients staying above the recommended 15-mg/L level at the beginning and end of surgery? (4) Are patients overdosed with vancomycin at greater risk of developing nephrotoxicity and acute kidney injury? METHODS: A single-institution, retrospective study was performed on 1828 patients undergoing primary TJAs who received vancomycin prophylaxis between 2008 and 2014...
July 2017: Clinical Orthopaedics and related Research
https://www.readbyqxmd.com/read/28350900/gram-positive-bacterial-infections-research-priorities-accomplishments-and-future-directions-of-the-antibacterial-resistance-leadership-group
#16
Sarah B Doernberg, Thomas P Lodise, Joshua T Thaden, Jose M Munita, Sara E Cosgrove, Cesar A Arias, Helen W Boucher, G Ralph Corey, Franklin D Lowy, Barbara Murray, Loren G Miller, Thomas L Holland
Antimicrobial resistance in gram-positive bacteria remains a challenge in infectious diseases. The mission of the Gram-Positive Committee of the Antibacterial Resistance Leadership Group (ARLG) is to advance knowledge in the prevention, management, and treatment of these challenging infections to improve patient outcomes. Our committee has prioritized projects involving methicillin-resistant Staphylococcus aureus (MRSA) and vancomycin-resistant enterococci (VRE) due to the scope of the medical threat posed by these pathogens...
March 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28350363/determination-of-vancomycin-in-human-serum-by-cyclodextrin-micellar-electrokinetic-capillary-chromatography-cd-mekc-and-application-for-pdap-patients
#17
Jiajing Wang, Yuqing Cao, Shengyuan Wu, Shuowen Wang, Xin Zhao, Tingting Zhou, Yuefen Lou, Guorong Fan
A simple and sensitive cyclodextrin-micellar electrokinetic capillary chromatography (CD-MEKC) method with UV detection was developed and validated for the determination of vancomycin (VCM) in serum. The separation was achieved in 14 min at 25 °C with a fused-silica capillary column of 40.2 cm × 50 mm i.d. (effective length 30.2 cm) and a run buffer containing 25 mM borate buffer with 50 mM sodium dodecylsulfonate (SDS) (pH 9.5) and 2% sulfobutyl-β-cyclodextrin (sulfobutyl-β-CD). Under optimal conditions for biological samples, good separations with high efficiency and short analysis time were achieved...
March 28, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28337080/vancomycin-auc-mic-and-corresponding-troughs-in-a-pediatric-population
#18
Omayma A Kishk, Allison B Lardieri, Emily L Heil, Jill A Morgan
OBJECTIVES: Adult guidelines suggest an area under the curve/minimum inhibitory concentration (AUC/MIC) > 400 corresponds to a vancomycin trough serum concentration of 15 to 20 mg/L for methicillin-resistant Staphylococcus aureus infections, but obtaining these troughs in children are difficult. The primary objective of this study was to assess the likelihood that 15 mg/kg of vancomycin every 6 hours in a child achieves an AUC/MIC > 400. METHODS: This retrospective chart review included pediatric patients >2 months to <18 years with a positive S aureus blood culture and documented MIC who received at least two doses of vancomycin with corresponding trough...
January 2017: Journal of Pediatric Pharmacology and Therapeutics: JPPT: the Official Journal of PPAG
https://www.readbyqxmd.com/read/28297816/-population-pharmacokinetics-of-vancomycin-from-severe-in-patients-with-lower-respiratory-tract-infection
#19
W Yang, B He, C H Deng
Objective: To develop a population pharmacokinetic (PPK) model of vancomycin in Chinese inpatients with severe lower respiratory tract infection. Methods: We gathered serum concentrations of vancomycin from inpatients who received vancomycin during Nov 2011 to Nov 2012.Vancomycin serum concentrations was measured by high performance liquid chromatography. Vancomycin PPK analysis was performed using nonlinear mixed effects model (NONMEM) program. Results: We gathered the data of 70 inpatients with lower respiratory tract infection at respiratory ward or respiratory intensive care unit(RICU) between Nov 2011 to Nov 2012 [58 males, 12 females; 78(23-91) years old; the mean of APACHⅡ score was 16...
March 12, 2017: Chinese Journal of Tuberculosis and Respiratory Diseases
https://www.readbyqxmd.com/read/28289024/pilot-study-of-a-bayesian-approach-to-estimate-vancomycin-exposure-in-obese-patients-with-limited-pharmacokinetic-sampling
#20
Joseph J Carreno, Ben Lomaestro, John Tietjan, Thomas P Lodise
This study evaluated the predictive performance of a Bayesian PK estimation method (ADAPT V) to estimate the 24-h vancomycin area under the curve (AUC) with limited pharmacokinetic (PK) sampling in adult obese patients receiving vancomycin for suspected or confirmed Gram-positive infections. This was an Albany Medical Center Institutional Review Board-approved prospective evaluation of 12 patients. Patients had a median (95% confidence interval) age of 61 years (39 to 71 years), a median creatinine clearance of 86 ml/min (75 to 120 ml/min), and a median body mass index of 45 kg/m(2) (40 to 52 kg/m(2))...
May 2017: Antimicrobial Agents and Chemotherapy
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