collection
MENU ▼
Read by QxMD icon Read
search

Measure GFR

shared collection
66 papers 0 to 25 followers
By Isabel Acosta-Ochoa Nephrology senior staff. Valladolid. Spain
https://www.readbyqxmd.com/read/28614683/single-nephron-glomerular-filtration-rate-in-healthy-adults
#1
Aleksandar Denic, Jerry Mathew, Lilach O Lerman, John C Lieske, Joseph J Larson, Mariam P Alexander, Emilio Poggio, Richard J Glassock, Andrew D Rule
BACKGROUND: The glomerular filtration rate (GFR) assesses the function of all nephrons, and the single-nephron GFR assesses the function of individual nephrons. How the single-nephron GFR relates to demographic and clinical characteristics and kidney-biopsy findings in humans is unknown. METHODS: We identified 1388 living kidney donors at the Mayo Clinic and the Cleveland Clinic who underwent a computed tomographic (CT) scan of the kidney with the use of contrast material and an iothalamate-based measurement of the GFR during donor evaluation and who underwent a kidney biopsy at donation...
June 15, 2017: New England Journal of Medicine
https://www.readbyqxmd.com/read/28549536/non-gfr-determinants-of-low-molecular-weight-serum-protein-filtration-markers-in-the-elderly-ages-kidney-and-mesa-kidney
#2
Meredith C Foster, Andrew S Levey, Lesley A Inker, Tariq Shafi, Li Fan, Vilmundur Gudnason, Ronit Katz, Gary F Mitchell, Aghogho Okparavero, Runolfur Palsson, Wendy S Post, Michael G Shlipak
BACKGROUND: Studies in chronic kidney disease populations suggest that the non-glomerular filtration rate (GFR) determinants of serum levels of the low-molecular-weight protein filtration markers cystatin C, β2-microglobulin (B2M), and beta-trace protein (BTP) are less affected by age, sex, and ethnicity than those of creatinine. STUDY DESIGN: Cross-sectional study. SETTING & PARTICIPANTS: Predominantly elderly participants selected from the Age, Gene/Environment Susceptibility Kidney Study (AGES-Kidney; N=683; mean [SD] age, 79 [4] years; GFR, 62 [17]mL/min/1...
May 24, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28505377/performance-of-glomerular-filtration-rate-estimating-equations-in-a-community-based-sample-of-blacks-and-whites-the-multiethnic-study-of-atherosclerosis
#3
Lesley A Inker, Andrew S Levey, Hocine Tighiouart, Tariq Shafi, John H Eckfeldt, Craig Johnson, Aghogho Okparavero, Wendy S Post, Josef Coresh, Michael G Shlipak
Background.: The Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations are recommended for glomerular filtration rate (GFR) estimation in the general population. They have not been evaluated in community-based populations, including Blacks at higher levels of GFR, but are commonly applied in such populations. Methods.: In an ancillary study of Multi-Ethnic Study of Atherosclerosis conducted at one site, we evaluated the performance of the CKD-EPI equations for creatinine (eGFRcr), cystatin C (eGFRcys) or the combination (eGFRcr-cys) compared with GFR measured as plasma clearance of iohexol...
May 13, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28490528/combining-new-tools-to-assess-renal-function-and-morphology-a-holistic-approach-to-study-the-effects-of-aging-and-a-congenital-nephron-deficit
#4
Stefania Geraci, Jorge Chacón-Caldera, Luise Anne Cullen-McEwen, Lothar R Schad, Carsten Sticht, Victor G Puelles, John F Bertram, Norbert Gretz
Recently, new methods for assessing renal function in conscious mice (transcutaneous assessment) and for counting and sizing all glomeruli in whole kidneys (MRI) were described. In the present study, these methods were used to assess renal structure and function in aging mice, and in mice born with a congenital low nephron endowment. Age-related nephron loss was analysed in adult C57BL/6 mice (10-50 weeks of age) and congenital nephron deficit was assessed in glial cell line-derived neurotrophic factor heterozygous (GDNF HET) null mutant mice...
May 10, 2017: American Journal of Physiology. Renal Physiology
https://www.readbyqxmd.com/read/28441651/serum-creatinine-not-so-simple
#5
Pierre Delanaye, Etienne Cavalier, Hans Pottel
Measuring serum creatinine is cheap and commonly done in daily practice. However, interpretation of serum creatinine results is not always easy. In this review, we will briefly remind the physiological limitations of serum creatinine due notably to its tubular secretion and the influence of muscular mass or protein intake on its concentration. We mainly focus on the analytical limitations of serum creatinine, insisting on important concept such as reference intervals, standardization (and IDMS traceability), analytical interferences, analytical coefficient of variation (CV), biological CV and critical difference...
April 26, 2017: Nephron
https://www.readbyqxmd.com/read/28405944/clinical-relevance-of-differences-in-glomerular-filtration-rate-estimations-in-frail-older-people-by-creatinine-vs-cystatin-c-based-formulae
#6
Anne Jacobs, Carolien Benraad, Jack Wetzels, Marcel Olde Rikkert, Cornelis Kramers
BACKGROUND: The risk of incorrect medication dosing is high in frail older people. Therefore, accurate assessment of the glomerular filtration rate is important. OBJECTIVE: The objective of this study was to compare the estimated glomerular filtration rate using creatinine- and cystatin C-based formulae, the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations, in frail older people. We hypothesized that frailty determines the difference between the creatinine- and cystatin C-based formulae...
June 2017: Drugs & Aging
https://www.readbyqxmd.com/read/28411971/mdrd-or-ckd-epi-for-glomerular-filtration-rate-estimation-in-living-kidney-donors
#7
Carla Burballa, Marta Crespo, Dolores Redondo-Pachón, María José Pérez-Sáez, Marisa Mir, Carlos Arias-Cabrales, Albert Francés, Lluis Fumadó, Lluis Cecchini, Julio Pascual
INTRODUCTION: The evaluation of the measured Glomerular Filtration Rate (mGFR) or estimated Glomerular Filtration Rate (eGFR) is key in the proper assessment of the renal function of potential kidney donors. We aim to study the correlation between glomerular filtration rate estimation equations and the measured methods for determining renal function. MATERIAL AND METHODS: We analysed the relationship between baseline GFR values measured by Tc-(99)m-DTPA (diethylene-triamine-pentaacetate) and those estimated by the four-variable Modification of Diet in Renal Disease (MDRD4) and Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equations in a series of living donors at our institution...
April 12, 2017: Nefrología: Publicación Oficial de la Sociedad Española Nefrologia
https://www.readbyqxmd.com/read/28355403/when-kidneys-get-old-an-essay-on-nephro-geriatrics
#8
Richard Glassock, Aleksandar Denic, Andrew D Rule
Aging is a nearly universal phenomenon in biology only partially controlled by genetic endowment. Individuals and their organs age at varying rates. The kidneys manifest the aging process by steady loss of nephrons and a corresponding decrease in glomerular filtration rate (GFR) beginning about age 30 years. The mechanisms responsible for this observation is are elusive. However, defining chronic kidney disease based on arbitrary, fixed thresholds of GFR in the later phases of life can be problematical as it may over-diagnosis CKD in the elderly...
March 2017: Jornal Brasileiro de Nefrologia: ʹorgão Oficial de Sociedades Brasileira e Latino-Americana de Nefrologia
https://www.readbyqxmd.com/read/28339825/glomerular-filtration-rate-estimating-equations-practical-yes-but-can-they-replace-measured-glomerular-filtration-rate
#9
Rajiv Agarwal
No abstract text is available yet for this article.
March 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28339801/routinely-measured-iohexol-glomerular-filtration-rate-versus-creatinine-based-estimated-glomerular-filtration-rate-as-predictors-of-mortality-in-patients-with-advanced-chronic-kidney-disease-a-swedish-chronic-kidney-disease-registry-cohort-study
#10
Shona Methven, Alessandro Gasparini, Juan J Carrero, Fergus J Caskey, Marie Evans
Background.: Estimated glomerular filtration rate (eGFR) becomes less reliable in patients with advanced chronic kidney disease (CKD). Methods.: Using the Swedish CKD Registry (2005-11), linked to the national inpatient, dialysis and death registers, we compared the performance of plasma-iohexol measured GFR (mGFR) and urinary clearance measures versus eGFR to predict death in adults with CKD stages 4/5. Performance was assessed using survival and prognostic models...
April 1, 2017: Nephrology, Dialysis, Transplantation
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
#11
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
#12
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
#13
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...
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
#14
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
#15
Elise Boele-Schutte, Ron T Gansevoort
No abstract text is available yet for this article.
April 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
#16
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 (FAS crea ) 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 ( Q cysC  =   0...
March 1, 2017: Nephrology, Dialysis, Transplantation
https://www.readbyqxmd.com/read/28062677/filtration-markers-as-predictors-of-esrd-and-mortality-individual-participant-data-meta-analysis
#17
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
#18
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
#19
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
#20
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
label_collection
label_collection
7032
1
2
2016-12-19 15:57:03
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"