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Creatinine clearance measurement

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https://www.readbyqxmd.com/read/28317454/comparison-of-methods-for-estimating-glomerular-filtration-rate-in-head-and-neck-cancer-patients-treated-with-cisplatin
#1
Lotte Lindberg, Kasper Brødbæk, Erik G Hägerström, Jens Bentzen, Bent Kristensen, Bo Zerahn
Cisplatin is a chemotherapeutic agent widely used in the treatment of various solid tumors. Cisplatin induces nephrotoxicity and may lead to long-term reduction of kidney function. Consequently, determination of glomerular filtration rate (GFR) is used to monitor potential kidney damage. This study aimed to compare two commonly used algorithms for estimating GFR (eGFR) from plasma creatinine (PCr) with (51)Cr-EDTA clearance (CrCl) as a reference method. This was a retrospective single center study of 94 head and neck cancer patients treated with cisplatin...
March 20, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28297816/-population-pharmacokinetics-of-vancomycin-from-severe-in-patients-with-lower-respiratory-tract-infection
#2
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/28296256/estimation-of-glomerular-filtration-rate-in-elderly-chronic-kidney-disease-patients-comparison-of-three-novel-sophisticated-equations-and-simple-cystatin-c-equation
#3
Sebastjan Bevc, Nina Hojs, Radovan Hojs, Robert Ekart, Maksimiljan Gorenjak, Ludvik Puklavec
Estimating glomerular filtration rate (GFR) in elderly patients is a problem, since they are poorly represented in studies developing GFR equations. Serum cystatin C is a better indicator of GFR than serum creatinine in elderly patients. Therefore the aim of our study was to compare frequently used serum cystatin C based GFR equations with a gold standard ((51) CrEDTA clearance) in elderly chronic kidney disease (CKD) patients. 106 adult Caucasian patients, older than 65 years (58 women, 48 men; mean age 72...
March 10, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28292877/the-effects-of-dual-ppar%C3%AE-%C3%AE-agonism-compared-with-ace-inhibition-in-the-btbrob-ob-mouse-model-of-diabetes-and-diabetic-nephropathy
#4
Anette Ericsson, Pernilla Tonelius, Mark Lal, Alan Sabirsh, Gerhard Böttcher, Lena William-Olsson, Maria Strömstedt, Camilla Johansson, Gina Hyberg, Sofia Tapani, Ann-Cathrine Jönsson-Rylander, Robert Unwin
The leptin-deficient BTBRob/ob mouse develops progressive albuminuria and morphological lesions similar to human diabetic nephropathy (DN), although whether glomerular hyperfiltration, a recognized feature of early DN that may contribute to renal injury, also occurs in this model is not known. Leptin replacement has been shown to reverse the signs of renal injury in this model, but in contrast, the expected renoprotection by angiotensin-converting enzyme (ACE) inhibition in BTBRob/ob mice seems to be limited...
March 2017: Physiological Reports
https://www.readbyqxmd.com/read/28292271/two-elderly-patients-with-normal-creatinine-and-elevated-cystatin-c-a-case-report
#5
Amina Loesment-Wendelmuth, Elke Schaeffner, Natalie Ebert
BACKGROUND: Serum creatinine concentration (Scr) and creatinine based GFR estimating equations (eGFRcr) are commonly used as an estimate of GFR. However, serum creatinine concentration is also influenced by non-GFR determinants. This case report presents two elderly patients with normal Scr but elevated serum cystatin C concentration (Scys) where the exclusive assessment of Scr would have lead to an overestimation of GFR and would have misclassified the patients as having a normal kidney function...
March 14, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28289967/a-pilot-trial-evaluating-zoledronic-acid-induced-changes-in-18-f-fmau-positron-emission-tomography-imaging-of-bone-metastases-in-prostate-cancer
#6
Ulka N Vaishampayan, Omid S Tehrani, Jawana M Lawhorn-Crews, Lance K Heilbrun, Kimberlee Dobson, Daryn Smith, Brenda Dickow, Anthony F Shields
PURPOSE: We conducted a pilot trial utilizing [(18)F]FMAU [1-(2'-deoxy-2'-[(18)F]fluoro-β-D-arabinofuranosyl thymine] as a tumor tracer in positron emission tomography (PET) and evaluated its reproducibility, and changes in maximum and peak standardized uptake value (SUVmax and SUVpeak) with zoledronic acid treatment in castrate resistant prostate cancer (CRPC) patients with bone metastases (BM). PROCEDURES: Eligible patients had CRPC with radiographic evidence of BM and creatinine clearance >30 ml/min...
March 13, 2017: Molecular Imaging and Biology: MIB: the Official Publication of the Academy of Molecular Imaging
https://www.readbyqxmd.com/read/28289024/evaluation-of-a-bayesian-approach-to-estimate-vancomycin-exposure-in-obese-patients-with-limited-pharmacokinetic-sampling-a-pilot-study
#7
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-hour vancomycin area under the curve estimation (AUC) with limited PK sampling in adult obese patients receiving vancomycin for suspected or confirmed Gram-positive infections. This was an IRB-approved prospective evaluation of 12 patients. Patients had a median (95% CI) age of 61 years (39 - 71), creatinine clearance of 86 mL/min (75 - 120), and body mass index of 45 kg/m(2) (40 - 52). For each patient, five PK concentrations were measured and 4 different vancomycin population PK models were used as Bayesian priors to estimate the estimate vancomycin AUC (AUCFULL)...
March 13, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28288543/renal-function-weaning-and-survival-in-patients-with-ventilator-dependent-respiratory-failure
#8
Debapriya Datta, Raymond J Foley, Rong Wu, James Grady, Paul Scalise
BACKGROUND: Acute kidney injury in acute critical illness has been associated with poor weaning and survival outcomes. The relation between renal dysfunction as defined by creatinine clearance (CrCl) and weaning from prolonged mechanical ventilation (PMV) is not known. The objective of this study was to determine the relation of measured CrCl to weaning and survival in patients on PMV. METHODS: We retrospectively studied 167 patients on PMV admitted to a long-term acute care facility for weaning over a 3-year period...
January 1, 2017: Journal of Intensive Care Medicine
https://www.readbyqxmd.com/read/28286115/association-between-augmented-renal-clearance-and-clinical-outcomes-in-patients-receiving-%C3%AE-lactam-antibiotic-therapy-by-continuous-or-intermittent-infusion-a-nested-cohort-study-of-the-bling-ii-randomised-placebo-controlled-clinical-trial
#9
Andrew A Udy, Joel M Dulhunty, Jason A Roberts, Joshua S Davis, Steven A R Webb, Rinaldo Bellomo, Charles Gomersall, Charudatt Shirwadkar, Glenn M Eastwood, John Myburgh, David L Paterson, Therese Starr, Sanjoy K Paul, Jeffrey Lipman
Augmented renal clearance (ARC) is known to influence β-lactam antibiotic pharmacokinetics. This substudy of the BLING-II trial aimed to explore the association between ARC and patient outcomes in a large randomised clinical trial. BLING-II enrolled 432 participants with severe sepsis randomised to receive β-lactam therapy by continuous or intermittent infusion. An 8-h creatinine clearance (CLCr) measured on Day 1 was used to identify ARC, defined as CLCr ≥ 130 mL/min. Patients receiving any form of renal replacement therapy were excluded...
March 9, 2017: International Journal of Antimicrobial Agents
https://www.readbyqxmd.com/read/28285317/efficacy-of-intravenous-iron-sucrose-in-hemodialysis-patients-with-restless-legs-syndrome-rls-a-randomized-placebo-controlled-study
#10
Yinghui Deng, Jinglin Wu, Qiang Jia
BACKGROUND Restless legs syndrome (RLS) is a common disorder in hemodialysis (HD) patients that causes sleep disturbances and diminished quality of life. Because iron deficiency has been implicated in the pathogenesis of RLS, we sought to investigate the effects of intravenous (IV) iron sucrose on symptoms of RLS in HD patients. MATERIAL AND METHODS The study was a randomized, placebo-controlled study of 1000 mg iron sucrose versus normal saline as placebo. Patients were evaluated at baseline and 2 weeks after the last injection...
March 12, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/28283268/perioperative-management-of-vitamin-k-antagonists-in-patients-with-low-thromboembolic-risk-undergoing-elective-surgery-a-prospective-experience
#11
Ana Florencia Becerra, María Teresita Cornavaca, José Ignacio Revigliono, Alejandro Contreras, Ricardo Albertini, Aldo Hugo Tabares
BACKGROUND AND OBJECTIVES: To quantify thromboembolic and bleeding events in patients with low thromboembolic risk, who were chronically receiving vitamin K antagonists and undergoing elective surgery. MATERIAL AND METHODS: A descriptive, prospective, single-center study was conducted between December 2010 and July 2014. Patients aged over 18 years old, chronically anticoagulated with vitamin K antagonists and admitted for elective surgery were included in the study...
March 7, 2017: Medicina Clínica
https://www.readbyqxmd.com/read/28281411/abnormalities-in-serum-biomarkers-correlate-with-lower-cardiac-index-in-the-fontan-population
#12
MULTICENTER STUDY
Bradley S Marino, David J Goldberg, Adam L Dorfman, Eileen King, Heidi Kalkwarf, Babette S Zemel, Margaret Smith, Jesse Pratt, Mark A Fogel, Amanda J Shillingford, Barbara J Deal, Anitha S John, Caren S Goldberg, Timothy M Hoffman, Marshall L Jacobs, Asher Lisec, Susan Finan, Lazaros K Kochilas, Thomas W Pawlowski, Kathleen Campbell, Clinton Joiner, Stuart L Goldstein, Paul Stephens, Alvin J Chin
BACKGROUND: Fontan survivors have depressed cardiac index that worsens over time. Serum biomarker measurement is minimally invasive, rapid, widely available, and may be useful for serial monitoring. The purpose of this study was to identify biomarkers that correlate with lower cardiac index in Fontan patients. Methods and results This study was a multi-centre case series assessing the correlations between biomarkers and cardiac magnetic resonance-derived cardiac index in Fontan patients ⩾6 years of age with biochemical and haematopoietic biomarkers obtained ±12 months from cardiac magnetic resonance...
January 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28276725/accuracy-diagrams-a-novel-way-to-illustrate-uncertainty-of-estimated-gfr
#13
Jonas Björk, Anders Grubb, Gunnar Sterner, Sten-Erik Bäck, Ulf Nyman
Most studies that validate GFR equations present accuracy results stratified by measured GFR (mGFR; diagnostic correctness) or by estimated GFR (eGFR; diagnostic predictiveness) only, without a clear distinction in interpretation. The accuracy of a GFR equation is normally reported in percent (e.g. P30), but is often misinterpreted when stratified by eGFR. The aim of the study was to develop new accuracy measures and diagrams that allow straightforward interpretations and illustrations of the uncertainty in eGFR in clinical practice...
May 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28276070/a-retrospective-evaluation-of-furosemide-and-mannitol-for-prevention-of-cisplatin-induced-nephrotoxicity
#14
C M Mach, C Kha, D Nguyen, J Shumway, K M Meaders, M Ludwig, M Y Williams-Brown, M L Anderson
WHAT IS KNOWN AND OBJECTIVE: Nephrotoxicity is a recognized side effect of cisplatin chemotherapy. However, the optimal strategy for preventing cisplatin-induced nephrotoxicity, if any, remains unclear. The primary objective for this study was to determine whether mannitol or furosemide provides better nephroprotection when administered with hydration prior to weekly, low-dose cisplatin concurrently with whole pelvic radiotherapy. METHODS: Clinical data were abstracted from all women who underwent chemoradiation for FIGO IB2-IVA cervical cancer at a regional safety net health system between January 2009 and December 2014...
March 9, 2017: Journal of Clinical Pharmacy and Therapeutics
https://www.readbyqxmd.com/read/28255294/multilevel-pharmacokinetics-driven-modeling-of-metabolomics-data
#15
Emilia Daghir-Wojtkowiak, Paweł Wiczling, Małgorzata Waszczuk-Jankowska, Roman Kaliszan, Michał Jan Markuszewski
INTRODUCTION: Multilevel modeling is a quantitative statistical method to investigate variability and relationships between variables of interest, taking into account population structure and dependencies. It can be used for prediction, data reduction and causal inference from experiments and observational studies allowing for more efficient elucidation of knowledge. OBJECTIVES: In this study we introduced the concept of multilevel pharmacokinetics (PK)-driven modelling for large-sample, unbalanced and unadjusted metabolomics data comprising nucleoside and creatinine concentration measurements in urine of healthy and cancer patients...
2017: Metabolomics: Official Journal of the Metabolomic Society
https://www.readbyqxmd.com/read/28253565/s-1-induced-lacrimal-drainage-obstruction-and-its-association-with-ingredients-metabolites-of-s-1-in-tears-and-plasma-a-prospective-multi-institutional-study
#16
Namju Kim, Jin Won Kim, Je-Hyun Baek, Jin-Soo Kim, Ho-Kyung Choung, Tae-Yong Kim, Kyung-Hun Lee, Yung-Jue Bang, Sang In Khwarg, Sang-Hoon Ahn, Do Joong Park, Hyung-Ho Kim, Jae-Yong Chung, Soyeon Ahn, Keun-Wook Lee
Purpose: This prospective study was conducted to determine the incidence of lacrimal drainage obstruction (LDO) during S-1 chemotherapy and evaluate the association between the development of LDO and the concentrations of ingredients/metabolites of S-1 in tears and plasma. Materials and Methods: A total of 145 patients with gastric cancer who received adjuvant S-1 therapy were enrolled. Ophthalmologic examinations were performed regularly during S-1 chemotherapy...
February 27, 2017: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/28245797/blood-pressure-and-age-related-gfr-decline-in-the-general-population
#17
Bjørn O Eriksen, Vidar T N Stefansson, Trond G Jenssen, Ulla D Mathisen, Jørgen Schei, Marit D Solbu, Tom Wilsgaard, Toralf Melsom
BACKGROUND: Hypertension is one of the most important causes of end-stage renal disease, but it is unclear whether elevated blood pressure (BP) also accelerates the gradual decline in the glomerular filtration rate (GFR) seen in the general population with increasing age. The reason may be that most studies have considered only baseline BP and not the effects of changes in BP, antihypertensive treatment and other determinants of GFR during follow-up. Additionally, the use of GFR estimated from creatinine or cystatin C instead of measurements of GFR may have biased the results because of influence from non-GFR related confounders...
February 28, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28235857/combined-long-term-caffeine-intake-and-exercise-inhibits-the-development-of-diabetic-nephropathy-in-oletf-rats
#18
Masato Suzuki, Daisuke Shindo, Ryuichiro Suzuki, Yoshiaki Shirataki, Hidefumi Waki
This study was performed to examine the effects of long-term caffeine-intake, with and without exercise, on the progression of diabetic nephropathy (DN) in an obese diabetic rat model. Thirty-two male Otsuka Long Evans Tokushima Fatty (OLETF) rats were assigned to sedentary (OLETF-Sed), exercise (OLETF-Ex), caffeine-intake (OLETF-Caf), and combined (OLETF-Caf & Ex) groups. Caffeine-intake groups were fed rat chow containing caffeine (90.7 ± 4.7 mg/kg/day). The OLETF-Ex and OLETF-Caf & Ex groups were able to run voluntarily at any time using a rotatory wheel...
February 23, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28230646/effect-of-calcineurin-inhibitor-free-everolimus-based-immunosuppressive-regimen-on-albuminuria-and-glomerular-filtration-rate-after-heart-transplantation
#19
Lærke M Nelson, Arne K Andreassen, Bert Andersson, Einar Gude, Hans Eiskjær, Göran Rådegran, Göran Dellgren, Lars Gullestad, Finn Gustafsson
BACKGROUND: Albuminuria in maintenance heart transplantation (HTx) is associated with poor renal response when switching to a calcineurin inhibitor (CNI)-lowered or free immunosuppressive regimen using everolimus (EVR), but the significance of albuminuria associated with EVR treatment after early CNI withdrawal in de novo HTx is unknown. METHODS: We tested if glomerular filtration rate (mGFR, measured by CrEDTA clearance) was associated with urine albumin/creatinine ratio (UACR) post-HTx in a subgroup of patients included in the SCHEDULE trial, where de novo HTx patients (n=115) were randomized to EVR with complete CNI elimination 7-11 weeks post-HTx or standard CNI immunosuppression...
February 23, 2017: Transplantation
https://www.readbyqxmd.com/read/28229162/pharmacokinetics-of-recombinant-human-soluble-thrombomodulin-in-disseminated-intravascular-coagulation-patients-with-acute-renal-dysfunction
#20
Mineji Hayakawa, Shigeki Kushimoto, Eizo Watanabe, Koji Goto, Yasushi Suzuki, Toru Kotani, Takeyuki Kiguchi, Tomoaki Yatabe, Jun Tagawa, Fumiyo Komatsu, Satoshi Gando
Recombinant human soluble thrombomodulin (ART-123) is a novel anticoagulant for patients with disseminated intravascular coagulation (DIC). It is widely used in clinical settings throughout Japan. Furthermore, a global Phase 3 study is currently being conducted. In healthy subjects, ART-123 is excreted mainly via the kidneys. Therefore, ART-123 dose decrease was recommended in DIC patients with severe renal dysfunction. However, the pharmacokinetics of ART-123 in DIC patients with severe acute renal dysfunction has not been elucidated...
February 23, 2017: Thrombosis and Haemostasis
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