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Measure GFR

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56 papers 0 to 25 followers
By Isabel Acosta-Ochoa Nephrology senior staff. Valladolid. Spain
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
#1
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/28292271/two-elderly-patients-with-normal-creatinine-and-elevated-cystatin-c-a-case-report
#2
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/28231583/prevalence-of-impaired-kidney-function-in-the-german-elderly-results-from-the-berlin-aging-study-ii-base-ii
#3
Maximilian König, Maik Gollasch, Ilja Demuth, Elisabeth Steinhagen-Thiessen
BACKGROUND: In aging populations with an ever-growing burden of risk factors such as obesity, diabetes, and hypertension, chronic kidney disease (CKD) is on the rise. However, little is known about its exact prevalence among elderly adults, and often albuminuria is not included in the definition of CKD. Moreover, novel equations for the estimated glomerular filtration rate (eGFR) have recently emerged, which have not been applied comprehensively to older adults. Data on CKD awareness among the elderly are sparse...
February 24, 2017: Gerontology
https://www.readbyqxmd.com/read/28235417/accuracy-of-glomerular-filtration-rate-equations-for-chronic-kidney-disease-patients-at-the-g3a-stage-a-single-center-cross-sectional-study
#4
Yanna Dou, Xiran Sun, Dong Liu, Li Zhang, Jing Xiao, Genyang Cheng, Dahai Yu, Zhanzheng Zhao
BACKGROUND: Kidney disease improving global outcomes provided a new classification for chronic kidney disease (CKD) by subdividing the G3 stage into G3a and G3b stages based on glomerular filtration rate (GFR) in 2012. Currently, a few methods are used to evaluate GFR, including measured GFR (mGFR) and estimated GFR (eGFR). One of the mGFR was (99m)Tc-DTPA scintigraphy method and eGFR using GFR equations were used clinically. Equations were modification of diet in renal disease (MDRD), chronic kidney disease epidemiology collaboration (CKD-EPI), and Chinese adapted MDRD (C-MDRD)...
February 24, 2017: BMC Research Notes
https://www.readbyqxmd.com/read/28158649/measured-gfr-not-a-gold-but-a-gold-plated-standard
#5
Elise Boele-Schutte, Ron T Gansevoort
No abstract text is available yet for this article.
February 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28089986/estimating-glomerular-filtration-rate-for-the-full-age-spectrum-from-serum-creatinine-and-cystatin-c
#6
Hans Pottel, Pierre Delanaye, Elke Schaeffner, Laurence Dubourg, Bjørn Odvar Eriksen, Toralf Melsom, Edmund J Lamb, Andrew D Rule, Stephen T Turner, Richard J Glassock, Vandréa De Souza, Luciano Selistre, Karolien Goffin, Steven Pauwels, Christophe Mariat, Martin Flamant, Natalie Ebert
BACKGROUND: We recently published and validated the new serum creatinine (Scr)-based full-age-spectrum equation (FAScrea) for estimating the glomerular filtration rate (GFR) for healthy and kidney-diseased subjects of all ages. The equation was based on the concept of normalized Scr and shows equivalent to superior prediction performance to the currently recommended equations for children, adolescents, adults and older adults. METHODS: Based on an evaluation of the serum cystatin C (ScysC) distribution, we defined normalization constants for ScysC (QcysC = 0...
January 15, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28062677/filtration-markers-as-predictors-of-esrd-and-mortality-individual-participant-data-meta-analysis
#7
Lesley A Inker, Josef Coresh, Yingying Sang, Chi-Yuan Hsu, Meredith C Foster, John H Eckfeldt, Amy B Karger, Robert G Nelson, Xun Liu, Mark Sarnak, Lawrence J Appel, Morgan Grams, Dawei Xie, Paul L Kimmel, Harold Feldman, Vasan Ramachandran, Andrew S Levey
BACKGROUND AND OBJECTIVES: Serum β-trace protein (BTP) and β-2 microglobulin (B2M) are associated with risk of ESRD and death in the general population and in populations at high risk for these outcomes (GP/HR) and those with CKD, but results differ among studies. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We performed an individual patient-level meta-analysis including three GP/HR studies (n=17,903 participants) and three CKD studies (n=5415). We compared associations, risk prediction, and improvement in reclassification of eGFR using BTP (eGFRBTP) and B2M (eGFRB2M) alone and the average (eGFRavg) of eGFRBTP, eGFRB2M, creatinine (eGFRcr), and cystatin C (eGFRcys), to eGFRcr, eGFRcys, and their combination (eGFRcr-cys) for ESRD (2075 events) and death (7275 events)...
January 6, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28049448/international-collaboration-for-the-epidemiology-of-egfr-in-low-and-middle-income-populations-rationale-and-core-protocol-for-the-disadvantaged-populations-egfr-epidemiology-study-degree
#8
Ben Caplin, Kristina Jakobsson, Jason Glaser, Dorothea Nitsch, Vivekanand Jha, Ajay Singh, Ricardo Correa-Rotter, Neil Pearce
BACKGROUND: There is an increasing recognition of epidemics of primarily tubular-interstitial chronic kidney disease (CKD) clustering in agricultural communities in low- and middle-income countries (LMICs). Although it is currently unclear whether there is a unified underlying aetiology, these conditions have been collectively termed CKD of undetermined cause (CKDu). CKDu is estimated to have led to the premature deaths of tens to hundreds of thousands of young men and women over the last 2 decades...
January 3, 2017: BMC Nephrology
https://www.readbyqxmd.com/read/28035622/the-huge-formula-hematocrit-urea-gender-for-screening-for-chronic-kidney-disease-in-elderly-patients-a-study-of-diagnostic-accuracy
#9
Carlos G Musso, Eduardo de Los Rios, Manuel Vilas, Sergio Terrasa, Griselda Bratti, Federico Varela, Guillermo Rosa Diez, Jose Jauregui, Daniel Luna
Chronically reduced glomerular filtration rate (GFR) in old people does not always mean that they suffer from chronic kidney disease (CKD) since their GFR can just be reduced by aging. The HUGE equation has been recently described and validated in Spain for screening CKD without taking into account the patient's GFR value. This equation is based on patient's hematocrit, plasma urea levels and gender. The present study documented that the HUGE equation had and acceptable performance for screening CKD in elderly Argentine patients...
April 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/27978513/an-overview-of-errors-and-flaws-of-estimated-gfr-versus-true-gfr-in-patients-with-diabetes-mellitus
#10
Sergio Luis-Lima, Esteban Porrini
The determination of renal function is crucial in patients with type 2 diabetes (T2DM), a population at risk for chronic kidney disease (CKD). Glomerular filtration rate (GFR) can be measured (mGFR) with gold standard methods or estimated (eGFR) with formulas. Since 1957, when Effersoe published the first formula, more than 50 equations have been developed to estimate GFR. In this review, we examined the studies that compared mGFR and eGFR in patients with T2DM to analyze the performance of those formulae in this population...
December 16, 2016: Nephron
https://www.readbyqxmd.com/read/27917582/agreement-between-chronic-kidney-disease-epidemiological-collaboration-and-berlin-initiative-study-equations-for-estimating-glomerular-filtration-rate-in-older-people-the-invecchiare-in-chianti-aging-in-chianti-region-study
#11
Andrea Corsonello, Claudio Pedone, Stefania Bandinelli, Luigi Ferrucci, Raffaele Antonelli Incalzi
AIM: The aim was to investigate to what extent chronic kidney disease (CKD) can be staged interchangeably by Chronic Kidney Disease Epidemiological Collaboration (CKD-EPI) and by Berlin Initiative Study (BIS) equations, and to verify whether cystatin C can improve concordance between formulas. METHODS: Our series consisted of 828 community-dwelling individuals aged 65 years or older enrolled in the Invecchiare in Chianti Study ("Aging in the Chianti Region"). Estimated glomerular filtration rate was calculated using the creatinine-based CKD-EPI, creatinine/cystatin C-based CKD-EPI, creatinine-based BIS and creatinine/cystatin C-based BIS equations...
December 5, 2016: Geriatrics & Gerontology International
https://www.readbyqxmd.com/read/27890838/preoperative-evaluation-of-the-renal-function-before-the-treatment-of-abdominal-aortic-aneurysms
#12
Raphael Coscas, Sandra Wagner, Eve Vilaine, Albane Sartorius, Isabelle Javerliat, Olivier Goeau-Brissonniere, Marc Coggia, Ziad Massy
OBJECTIVES: Chronic impaired renal function (IRC) constitutes a major risk factor of morbi-mortality during the treatment of an abdominal aortic aneurism (AAA). The inflammatory state due to the AAA could result in a reduction in the muscular mass and an over-estimation of the glomerular filtration rate (GFR) with the usual formulas. The objective of this study was to determine if the formulae used to evaluate the estimated GFR were adapted in patients with AAA. MATERIALS AND METHODS: Between August 2013 and November 2014, we conducted an exploratory study to evaluate the renal function before surgery for AAA in 28 patients...
November 24, 2016: Annals of Vascular Surgery
https://www.readbyqxmd.com/read/27894952/comparison-of-creatinine-and-cystatin-c-based-egfr-in-the-estimation-of-glomerular-filtration-rate-in-indigenous-australians-the-egfr-study
#13
Elizabeth Lm Barr, Louise J Maple-Brown, Federica Barzi, Jaquelyne T Hughes, George Jerums, Elif I Ekinci, Andrew G Ellis, Graham Rd Jones, Paul D Lawton, Cherian Sajiv, Sandawana W Majoni, Alex Dh Brown, Wendy E Hoy, Kerin O'Dea, Alan Cass, Richard J MacIsaac
BACKGROUND: The Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation that combines creatinine and cystatin C is superior to equations that include either measure alone in estimating glomerular filtration rate (GFR). However, whether cystatin C can provide any additional benefits in estimating GFR for Indigenous Australians, a population at high risk of end-stage kidney disease (ESKD) is unknown. METHODS: Using a cross-sectional analysis from the eGFR Study of 654 Indigenous Australians at high risk of ESKD, eGFR was calculated using the CKD-EPI equations for serum creatinine (eGFRcr), cystatin C (eGFRcysC) and combined creatinine and cystatin C (eGFRcysC+cr)...
November 25, 2016: Clinical Biochemistry
https://www.readbyqxmd.com/read/27876172/cystatin-c-versus-creatinine-for-gfr-estimation-in-ckd-due-to-heart-failure
#14
LETTER
Delphine Kervella, Sandrine Lemoine, Florence Sens, Laurence Dubourg, Laurent Sebbag, Fitsum Guebre-Egziabher, Eric Bonnefoy, Laurent Juillard
No abstract text is available yet for this article.
November 18, 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/27884475/frailty-kidney-function-and-polypharmacy-the%C3%A2-atherosclerosis-risk-in-communities-aric-study
#15
Shoshana H Ballew, Yan Chen, Natalie R Daya, Job G Godino, B Gwen Windham, Mara McAdams-DeMarco, Josef Coresh, Elizabeth Selvin, Morgan E Grams
BACKGROUND: Frail individuals are at increased risk for poor outcomes, including adverse drug events. Kidney function is often compromised in frailty and is a key consideration in medication choice and dosing; however, creatinine-based measures of kidney function may be biased in frail individuals. STUDY DESIGN: Observational study. SETTING & PARTICIPANTS: 4,987 community-dwelling older men and women with complete data who participated in visit 5 of the Atherosclerosis Risk in Communities (ARIC) Study (2011-2013)...
February 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/27827312/interlaboratory-variability-in-plasma-creatinine-measurement-and-the-relation-with-estimated-glomerular-filtration-rate-and-chronic-kidney-disease-diagnosis
#16
Elizabeth Lee, Christine P Collier, Christine A White
BACKGROUND AND OBJECTIVES: The tracing of creatinine (Cr) reference materials to isotope dilution mass spectrometry-assigned values was implemented worldwide to reduce interlaboratory variability and improve assay accuracy. The aims of this study were to examine the current extent of interlaboratory variability and its effect on eGFR. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: Leftover plasma from 2-3 consecutive days was obtained from 53 intensive care unit patients with a range of kidney functions...
January 6, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/27829460/renal-function-estimation-and-cockroft-gault-formulas-for-predicting-cardiovascular-mortality-in-population-based-cardiovascular-risk-heart-failure-and-post-myocardial-infarction-cohorts-the-heart-omics-in-ageing-homage-and-the-high-risk-myocardial-infarction
#17
João Pedro Ferreira, Nicolas Girerd, Pierpaolo Pellicori, Kevin Duarte, Sophie Girerd, Marc A Pfeffer, John J V McMurray, Bertram Pitt, Kenneth Dickstein, Lotte Jacobs, Jan A Staessen, Javed Butler, Roberto Latini, Serge Masson, Alexandre Mebazaa, Hans Peter Brunner-La Rocca, Christian Delles, Stephane Heymans, Naveed Sattar, J Wouter Jukema, John G Cleland, Faiez Zannad, Patrick Rossignol
BACKGROUND: Renal impairment is a major risk factor for mortality in various populations. Three formulas are frequently used to assess both glomerular filtration rate (eGFR) or creatinine clearance (CrCl) and mortality prediction: body surface area adjusted-Cockcroft-Gault (CG-BSA), Modification of Diet in Renal Disease Study (MDRD4), and the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation. The CKD-EPI is the most accurate eGFR estimator as compared to a "gold-standard"; however, which of the latter is the best formula to assess prognosis remains to be clarified...
November 10, 2016: BMC Medicine
https://www.readbyqxmd.com/read/27726196/evaluation-of-mdrd4-ckd-epi-bis-1-and-modified-cockcroft-gault-equations-to-estimate-glomerular-filtration-rate-in-the-elderly-renal-transplanted-recipients
#18
Elias David-Neto, Ana Heloisa Kamada Triboni, Fernanda Ramos, Fabiana Agena, Nelson Zocoler Galante, Marcelo Altona, Francine Brambate Carvalhinho Lemos, Marcelo Tatit Sapienza, William Carlos Nahas
Equations to estimate glomerular filtration rate (eGFR) were developed in patients using the variables age, body weight, and serum creatinine, which may be different in the elderly. Elderly renal transplant patients (EG; n=70; mean age 65 ± 4 y) who measured plasma (51) Cr-EDTA-Clearance (mGFR) had mGFR compared to eGFR obtained by the Cockcroft-Gault corrected by body surface area (CG-BSA), the modification of diet in renal disease (MDRD-4), the Berlin Initiative Study (BIS-1), and the chronic kidney disease epidemiology collaboration (CKD-EPI)...
December 2016: Clinical Transplantation
https://www.readbyqxmd.com/read/27679716/iohexol-plasma-clearance-for-measuring-glomerular-filtration-rate-in-clinical-practice-and-research-a-review-part-2-why-to-measure-glomerular-filtration-rate-with-iohexol
#19
Pierre Delanaye, Toralf Melsom, Natalie Ebert, Sten-Erik Bäck, Christophe Mariat, Etienne Cavalier, Jonas Björk, Anders Christensson, Ulf Nyman, Esteban Porrini, Giuseppe Remuzzi, Piero Ruggenenti, Elke Schaeffner, Inga Soveri, Gunnar Sterner, Bjørn Odvar Eriksen, Flavio Gaspari
A reliable assessment of glomerular filtration rate (GFR) is of paramount importance in clinical practice as well as epidemiological and clinical research settings. It is recommended by Kidney Disease: Improving Global Outcomes guidelines in specific populations (anorectic, cirrhotic, obese, renal and non-renal transplant patients) where estimation equations are unreliable. Measured GFR is the only valuable test to confirm or confute the status of chronic kidney disease (CKD), to evaluate the slope of renal function decay over time, to assess the suitability of living kidney donors and for dosing of potentially toxic medication with a narrow therapeutic index...
October 2016: Clinical Kidney Journal
https://www.readbyqxmd.com/read/27663042/non-gfr-determinants-of-low-molecular-weight-serum-protein%C3%A2-filtration-markers-in-ckd
#20
Xun Liu, Meredith C Foster, Hocine Tighiouart, Amanda H Anderson, Gerald J Beck, Gabriel Contreras, Josef Coresh, John H Eckfeldt, Harold I Feldman, Tom Greene, L Lee Hamm, Jiang He, Edward Horwitz, Julia Lewis, Ana C Ricardo, Haochang Shou, Raymond R Townsend, Matthew R Weir, Lesley A Inker, Andrew S Levey
BACKGROUND: Unlike the case with creatinine, conditions affecting the non-glomerular filtration rate (GFR) determinants of low-molecular-weight serum proteins, β-trace protein (BTP), β2-microglobulin (B2M), and cystatin C, are not well characterized. STUDY DESIGN: Pooled cross-sectional analysis of 3 studies. SETTING & PARTICIPANTS: 3,156 persons with chronic kidney disease from the MDRD (Modification of Diet in Renal Disease) Study, AASK (African American Study of Kidney Disease and Hypertension), and CRIC (Chronic Renal Insufficiency Cohort) Study...
December 2016: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
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