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https://www.readbyqxmd.com/read/28549535/relationships-of-measured-iohexol-gfr-and-estimated-gfr-with-ckd-related-biomarkers-in-children-and-adolescents
#1
Derek K Ng, George J Schwartz, Bradley A Warady, Susan L Furth, Alvaro Muñoz
BACKGROUND: 2 valid and reliable estimated glomerular filtration rate (GFR) equations for the pediatric population have been developed from directly measured GFR data in the Chronic Kidney Disease in Children (CKiD) cohort: the full CKiD and bedside CKiD equations. Although adult GFR estimating equations replicate relationships of measured GFR with biomarkers, it is unclear whether similar patterns exist among children and adolescents with chronic kidney disease (CKD). STUDY DESIGN: Prospective cohort study in children and adolescents...
May 24, 2017: American Journal of Kidney Diseases: the Official Journal of the National Kidney Foundation
https://www.readbyqxmd.com/read/28523356/evaluation-of-height-dependent-and-height-independent-methods-of-estimating-baseline-serum-creatinine-in-critically-ill-children
#2
Erin Hessey, Rami Ali, Marc Dorais, Geneviève Morissette, Michael Pizzi, Nikki Rink, Philippe Jouvet, Jacques Lacroix, Véronique Phan, Michael Zappitelli
BACKGROUND: Baseline serum creatinine (bSCr) is required for diagnosing acute kidney injury (AKI). In children, bSCr is commonly defined as the lowest measurement within 3 months of admission. Measured values are often missing and estimating bSCr using height-based glomerular filtration rate (GFR) equations is problematic when height is unavailable. METHODS: This is a retrospective cohort study including 538 children admitted to the intensive care unit (ICU) between 2003 and 2005 at two centers in Canada, with measured bSCr, height, and ICU-SCr values...
May 18, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28521564/estimating-glomerular-filtration-rate-gfr-in-children-the-average-between-a-cystatin-c-and-a-creatinine-based-equation-improves-estimation-of-gfr-in-both-children-and-adults-and-enables-diagnosing-shrunken-pore-syndrome
#3
Felicia Leion, Josefine Hegbrant, Emil den Bakker, Magnus Jonsson, Magnus Abrahamson, Ulf Nyman, Jonas Björk, Veronica Lindström, Anders Larsson, Arend Bökenkamp, Anders Grubb
Estimating glomerular filtration rate (GFR) in adults by using the average of values obtained by a cystatin C- (eGFRcystatin C) and a creatinine-based (eGFRcreatinine) equation shows at least the same diagnostic performance as GFR estimates obtained by equations using only one of these analytes or by complex equations using both analytes. Comparison of eGFRcystatin C and eGFRcreatinine plays a pivotal role in the diagnosis of Shrunken Pore Syndrome, where low eGFRcystatin C compared to eGFRcreatinine has been associated with higher mortality in adults...
May 19, 2017: Scandinavian Journal of Clinical and Laboratory Investigation
https://www.readbyqxmd.com/read/28443267/no-impact-of-the-analytical-method-used-for-determining-cystatin-c-on-estimating-glomerular-filtration-rate-in-children
#4
Martin Alberer, Julia Hoefele, Marcus R Benz, Arend Bökenkamp, Lutz T Weber
BACKGROUND: Measurement of inulin clearance is considered to be the gold standard for determining kidney function in children, but this method is time consuming and expensive. The glomerular filtration rate (GFR) is on the other hand easier to calculate by using various creatinine- and/or cystatin C (Cys C)-based formulas. However, for the determination of serum creatinine (Scr) and Cys C, different and non-interchangeable analytical methods exist. Given the fact that different analytical methods for the determination of creatinine and Cys C were used in order to validate existing GFR formulas, clinicians should be aware of the type used in their local laboratory...
2017: Frontiers in Pediatrics
https://www.readbyqxmd.com/read/28306525/efficient-reporting-of-the-estimated-glomerular-filtration-rate-without-height-in-pediatric-patients-with-cancer
#5
Tae-Dong Jeong, Eun-Jung Cho, Woochang Lee, Sail Chun, Ki-Sook Hong, Won-Ki Min
BACKGROUND: The updated bedside Schwartz equation requires constant, serum creatinine concentration and height measurements to calculate the estimated glomerular filtration rate (eGFR) in pediatric patients. Unlike the serum creatinine levels, obtaining height information from the laboratory information system (LIS) is not always possible in a clinical laboratory. Recently, the height-independent eGFR equation, the full age spectrum (FAS) equation, has been introduced. We evaluated the performance of height-independent eGFR equation in Korean children with cancer...
March 15, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28245441/childhood-estimates-of-glomerular-filtration-rate-based-on-creatinine-and-cystatin-c-importance-of-body-composition
#6
Kozeta Miliku, Hanneke Bakker, Eiske M Dorresteijn, Karlien Cransberg, Oscar H Franco, Janine F Felix, Vincent W V Jaddoe
BACKGROUND: Creatinine and cystatin C concentrations are commonly used to estimate glomerular filtration rate (eGFR) in clinical practice and epidemiological studies. To estimate the influence of different body composition measures on eGFR from creatinine and cystatin C blood concentrations, we compared the associations of different anthropometric and body composition measures with eGFR derived from creatinine (eGFRcreat) and cystatin C (eGFRcystC) blood concentrations. METHODS: In a population-based cohort study among 4,305 children aged 6...
2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28177130/a-population-pharmacokinetic-model-of-at9283-in-adults-and-children-to-predict-the-maximum-tolerated-dose-in-children-with-leukaemia
#7
Janna K Duong, Melanie J Griffin, Darren Hargrave, Josef Vormoor, David Edwards, Alan V Boddy
AIMS: AT9283 is used to treat patients with solid tumors and patients with leukaemia. However, the maximum tolerated dose (MTD) for children with leukaemia remains unknown due to early termination of the Phase I trial. The aim of this study was to develop a population model of AT9283 to describe the pharmacokinetics in adults and children and to estimate the MTD in children with leukaemia. METHODS: Data from Phase I dose-escalation studies in adults and children were used to build a population pharmacokinetic model (NONMEM v7...
February 8, 2017: British Journal of Clinical Pharmacology
https://www.readbyqxmd.com/read/28141570/pottels-equation-for-estimation-of-glomerular-filtration-rate
#8
Himesh Barman, Samiran Bisai, Bipul Kumar Das, Chandan Kumar Nath, Sourabh Gohain Duwarah
The retrospective study was carried out to examine performance of Pottels height- independent equation compared to Schwartzs height-dependent equation to estimate glomerular filtration rate in 115 children in Indian setting. The Pottels equation performed well compared to updated Schwartz equation (R2=0.94, mean bias 0.25, 95% LOA=20.4, -19.9). The precision was better at lower range of estimated GFR.
January 15, 2017: Indian Pediatrics
https://www.readbyqxmd.com/read/28089986/estimating-glomerular-filtration-rate-for-the-full-age-spectrum-from-serum-creatinine-and-cystatin-c
#9
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/27856008/comprehensive-renal-function-evaluation-in-patients-treated-for-synchronous-bilateral-wilms-tumor
#10
Rodrigo B Interiano, M Beth McCarville, Noel Delos Santos, Shenghua Mao, Jianrong Wu, Jeffrey S Dome, Kathleen Kieran, Mark A Williams, Rachel C Brennan, Matthew J Krasin, Daniel M Green, Andrew M Davidoff
OBJECTIVES: The purpose of this study was to perform a comprehensive assessment of long-term renal function in patients treated at our institution for synchronous bilateral Wilms tumor (BWT) and to determine the optimal method for estimating glomerular filtration rate (eGFR). METHODS: Surgical approach, adjuvant therapy, and pathology reports were reviewed for patients with at least six months follow-up from definitive surgery. eGFRs, as assessed by the Schwartz and Chronic Kidney Disease in Children (CKiD) formulas, were compared to measured GFR (mGFR) determined by (99m)Tc-DTPA scanning...
January 2017: Journal of Pediatric Surgery
https://www.readbyqxmd.com/read/27826732/renin-angiotensin-ii-aldosterone-system-blockers-and-time-to-renal-replacement-therapy-in-children-with-ckd
#11
Alison G Abraham, Aisha Betoko, Jeffrey J Fadrowski, Christopher Pierce, Susan L Furth, Bradley A Warady, Alvaro Muñoz
BACKGROUND: Clinical care decisions to treat chronic kidney disease (CKD) in a growing child must often be made without the benefit of evidence from clinical trials. We used observational data from the Chronic Kidney Disease in Children cohort to estimate the effectiveness of renin-angiotensin II-aldosterone system blockade (RAAS) to delay renal replacement therapy (RRT) in children with CKD. METHODS: A total of 851 participants (median age: 11 years, median glomerular filtration rate [GFR]: 52 ml/min/1...
April 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/27689114/correlation-between-cystatin-c-based-formulas-schwartz-formula-and-urinary-creatinine-clearance-for-glomerular-filtration-rate-estimation-in-children-with-kidney-disease
#12
Afshin Safaei-Asl, Mercede Enshaei, Abtin Heydarzadeh, Shohreh Maleknejad
INTRODUCTION: Assessment of glomerular filtration rate (GFR) is an important tool for monitoring renal function. OBJECTIVES: Regarding to limitations in available methods, we intended to calculate GFR by cystatin C (Cys C) based formulas and determine correlation rate of them with current methods. PATIENTS AND METHODS: We studied 72 children (38 boys and 34 girls) with renal disorders. The 24 hour urinary creatinine (Cr) clearance was the gold standard method...
2016: Journal of Renal Injury Prevention
https://www.readbyqxmd.com/read/27687620/assessment-of-dietary-intake-of-children-with-chronic-kidney-disease
#13
Wun Fung Hui, Aisha Betoko, Jonathan D Savant, Alison G Abraham, Larry A Greenbaum, Bradley Warady, Marva M Moxey-Mims, Susan L Furth
OBJECTIVE: Our aim was to characterize the nutrient intake of children with chronic kidney disease (CKD) relative to recommended intake levels. METHODS: We conducted a cross-sectional study of dietary intake assessed by Food Frequency Questionnaire (FFQ) in The North American Chronic Kidney Disease in Children (CKiD) prospective cohort study. Nutrient intake was analyzed to estimate the daily consumption levels of various nutrients and compared with national guidelines for intake...
March 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/27614698/laparoscopic-pyeloplasty-versus-open-pyeloplasty-for-recurrent-ureteropelvic-junction-obstruction-in-children
#14
A M Abdel-Karim, A Fahmy, A Moussa, H Rashad, M Elbadry, H Badawy, A Hammady
INTRODUCTION AND OBJECTIVES: Recurrent ureteropelvic junction obstruction (UPJO) in children is an operative challenge. Minimally invasive endourological treatment options for secondary UPJO have suboptimal success rates; hence, there is a re-emergence of interest about redo pyeloplasty. The present study presented experience with laparoscopic management of previously failed pyeloplasty compared with open redo pyeloplasty in children. STUDY DESIGN: Twenty-four children with recurrent UPJO who underwent transperitoneal dismembered laparoscopic pyeloplasty were studied...
December 2016: Journal of Pediatric Urology
https://www.readbyqxmd.com/read/27561289/fibroblast-growth-factor-23-and-risk-of-ckd-progression-in-children
#15
Anthony A Portale, Myles S Wolf, Shari Messinger, Farzana Perwad, Harald Jüppner, Bradley A Warady, Susan L Furth, Isidro B Salusky
BACKGROUND AND OBJECTIVES: Plasma fibroblast growth factor 23 (FGF23) concentrations increase early in the course of CKD in children. High FGF23 levels associate with progression of CKD in adults. Whether FGF23 predicts CKD progression in children is unknown. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We tested the hypothesis that high plasma FGF23 is an independent risk factor for CKD progression in 419 children, aged 1-16 years, enrolled in the Chronic Kidney Disease in Children (CKiD) cohort study...
November 7, 2016: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/27542858/cystatin-c-calculated-glomerular-filtration-rate-a-marker-of-early-renal-dysfunction-in-patients-with-neuropathic-bladder
#16
Pankaj P Dangle, Omar Ayyash, Audry Kang, Carlton Bates, Janelle Fox, Heidi Stephany, Glenn Cannon
OBJECTIVE: To asses if cystatin c-calculated glomerular filtration rate (GFR) can reveal chronic kidney disease (CKD) not detected by creatinine-based calculations in a larger prospective cohort of children with myelomeningocele (MMC). Wheelchair-bound MMC patients frequently have low muscle mass, and assessing renal deterioration based on creatinine-based GFR is imprecise. MMC patients are also at risk for end-stage renal disease. METHODS: Prospectively enrolled patients with MMC underwent annual serum creatinine and cystatin c testing...
August 16, 2016: Urology
https://www.readbyqxmd.com/read/27499411/salvageability-of-renal-function-following-renal-revascularisation-in-children-with-takayasu-s-arteritis-induced-renal-artery-stenosis
#17
Patience Ngozi Obiagwu, Priya Gajjar, Mignon McCulloch, Christian Scott, Alp Numanoglu, Peter Nourse
BACKGROUND: Renal artery revascularisation procedures are usually carried out on children with renal artery stenosis from varied causes, including Takayasu's arteritis. Reports on the outcome of such procedures in children usually refer to the improvement in blood pressure, with only minimal mention of effects on renal function. OBJECTIVE: Salvageability of renal function in children who underwent renal revascularisation for Takayasu's arteritis-induced renal artery stenosis (TARAS) was the focus of this study...
July 4, 2016: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/27472326/the-impact-of-nonalcoholic-fatty-liver-disease-on-renal-function-in-children-with-overweight-obesity
#18
COMPARATIVE STUDY
Lucia Pacifico, Enea Bonci, Gian Marco Andreoli, Michele Di Martino, Alessia Gallozzi, Ester De Luca, Claudio Chiesa
The association between nonalcoholic fatty liver disease (NAFLD) and chronic kidney disease has attracted interest and attention over recent years. However, no data are available in children. We determined whether children with NAFLD show signs of renal functional alterations, as determined by estimated glomerular filtration rate (eGFR) and urinary albumin excretion. We studied 596 children with overweight/obesity, 268 with NAFLD (hepatic fat fraction ≥5% on magnetic resonance imaging) and 328 without NAFLD, and 130 healthy normal-weight controls...
July 27, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27375851/perceptions-of-pediatric-nephrologists-regarding-timing-of-dialysis-initiation-in-children-in-canada
#19
Jeremy A Saban, Michael Zappitelli, Susan M Samuel, Manish M Sood, R Todd Alexander, Steven Arora, Robin L Erickson, Kristine Kroeker, Braden J Manns, Allison B Dart
BACKGROUND: Significant practice variation exists in Canada with respect to timing of dialysis initiation in children. In the absence of evidence to guide practice, physicians' perceptions may significantly influence decision-making. OBJECTIVE: The objectives of this study are to (1) evaluate Canadian pediatric nephrologists' perceptions regarding dialysis initiation in children with chronic kidney disease (CKD) and (2) determine the factors guiding practice that may contribute to practice variation across Canada...
2016: Canadian Journal of Kidney Health and Disease
https://www.readbyqxmd.com/read/27369694/iohexol-plasma-clearance-in-children-validation-of-multiple-formulas-and-two-point-sampling-times
#20
Camilla Tøndel, Bjørn Bolann, Cathrin Lytomt Salvador, Damien Brackman, Anna Bjerre, Einar Svarstad, Atle Brun
BACKGROUND: In children, estimated glomerular filtration rate (eGFR) methods are hampered by inaccuracy, hence there is an obvious need for safe, simplified, and accurate measured GFR (mGFR) methods. The aim of this study was to evaluate different formulas and determine the optimal sampling points for calculating mGFR based on iohexol clearance measurements on blood samples drawn at two time points (GFR2p). METHODS: The GFR of 96 children with different stages of chronic kidney disease (CKD) (median age 9...
February 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
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