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https://www.readbyqxmd.com/read/29134449/iohexol-plasma-clearance-in-children-validation-of-multiple-formulas-and-single-point-sampling-times
#1
Camilla Tøndel, Cathrin Lytomt Salvador, Karl Ove Hufthammer, Bjørn Bolann, Damien Brackman, Anna Bjerre, Einar Svarstad, Atle Brun
BACKGROUND: The non-ionic agent iohexol is increasingly used as the marker of choice for glomerular filtration rate (GFR) measurement. Estimates of GFR in children have low accuracy and limiting the number of blood-draws in this patient population is especially relevant. We have performed a study to evaluate different formulas for calculating measured GFR based on plasma iohexol clearance with blood sampling at only one time point (GFR1p) and to determine the optimal sampling time point...
November 13, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/29129242/intestinal-failure-as-a-significant-risk-factor-for-renal-impairment-in-children
#2
Elisa Ylinen, Laura Merras-Salmio, Riikka Gunnar, Timo Jahnukainen, Mikko P Pakarinen
OBJECTIVE: Although impaired renal function has been a frequent finding among adults with intestinal failure (IF), the data on children is scarce. The aim of this study was to assess renal function in pediatric-onset IF. METHODS: Medical records of 70 patients (38 boys) with pediatric-onset IF due to either short bowel syndrome (n = 59) or primary motility disorder (n = 11) and a history of parenteral nutrition (PN) dependency for ≥1 mo were evaluated. Renal function at the most recent follow-up was studied using plasma creatinine, cystatin C, and urea concentrations and estimated glomerular filtration rate (eGFR)...
January 2018: Nutrition
https://www.readbyqxmd.com/read/29083076/comparison-of-methods-to-estimate-glomerular-filtration-rate-in-paediatric-oncology-patients
#3
Carolina C Llanos-Paez, Christine Staatz, Rachael Lawson, Stefanie Hennig
AIMS: Glomerular filtration rate (GFR) is estimated daily in paediatric oncology patients; however, few equations, particularly ones that do not include serum creatinine, have been evaluated in this population. We aimed to compare the predictive performance of different equations available to estimate GFR in paediatric oncology patients. METHODS: GFR was measured (mGFR) in paediatric oncology patients based on a chromium 51-labeled ethylene diamine tetraacetic acid excretion test...
October 30, 2017: Journal of Paediatrics and Child Health
https://www.readbyqxmd.com/read/29062906/elevated-cystatin-c-is-it-a-reflection-for-kidney-or-liver-impairment-in-hepatic-children
#4
Behairy El-Sayed, Hanaa El-Araby, Nermin Adawy, Mona Hassona, Naglaa El-Nady, Haidy Zakaria, Mohammed Khedr
AIM OF THE STUDY: To assess if elevated serum cystatin C (Cyst-C) is an indicator for renal or hepatic dysfunction in presence of liver fibrosis. MATERIAL AND METHODS: Data of 50 children with chronic liver diseases (CLDs), out of which 25 were without renal impairment, and 25 with renal impairment were analyzed. Twenty healthy children served as a healthy control group. Routine investigations, creatinine clearance, hepatitis viral markers, abdominal ultrasonography, and liver biopsy were performed for patients with CLDs...
September 2017: Clin Exp Hepatol
https://www.readbyqxmd.com/read/28979155/role-of-serum-cystatin-c-and-beta-2-microglobulin-as-early-markers-of-renal-dysfunction-in-children-with-beta-thalassemia-major
#5
Ola Galal Behairy, Eman Rateb Abd Almonaem, Neveen Tawfik Abed, Omima M Abdel Haiea, Rasha M Zakaria, Rania I AbdEllaty, Effat H Asr, Amira Ibrahim Mansour, Amira Mn Abdelrahman, Hoda A Elhady
BACKGROUND: Although advancements have been made in the management of thalassemic patients, many unrecognized complications have emerged, such as renal abnormalities. AIM: To measure serum levels of cystatin-C and β-2 microglobulin in children with beta-thalassemia major (β-TM) and investigate their significance as early markers of glomerular and tubular dysfunctions. SUBJECTS AND METHODS: The study was performed on 70 children with (β-TM) and 20 apparently healthy children matched for age and sex as a control group...
2017: International Journal of Nephrology and Renovascular Disease
https://www.readbyqxmd.com/read/28939943/accumulation-of-uraemic-toxins-is-reflected-only-partially-by-estimated-gfr-in-paediatric-patients-with-chronic-kidney-disease
#6
Evelien Snauwaert, Wim Van Biesen, Ann Raes, Els Holvoet, Griet Glorieux, Koen Van Hoeck, Maria Van Dyck, Nathalie Godefroid, Raymond Vanholder, Sanne Roels, Johan Vande Walle, Sunny Eloot
BACKGROUND: Chronic kidney disease (CKD) in childhood is characterised by the accumulation of uraemic toxins resulting in a multisystem disorder that has a negative impact on quality of life. Childhood CKD is predominantly defined by a decrease in glomerular filtration rate, estimated (eGFR) by a single serum measurement of endogenous biomarkers, e.g. creatinine. The objective of this study was to evaluate how accurately eGFR predicts the concentration of uraemic toxins in a paediatric CKD cohort...
September 22, 2017: Pediatric Nephrology: Journal of the International Pediatric Nephrology Association
https://www.readbyqxmd.com/read/28920466/annals-express-evaluation-of-common-paediatric-creatinine-based-glomerular-filtration-rate-gfr-estimating-equations-in-black-african-children-in-kwazulu-natal-south-africa
#7
Yashna Rampursat, Rajendra Bhimma, Elaene Naicker, Fozy Peer, Verena Gounden
Background The use of serum creatinine (S-Cr) equations for estimating glomerular filtration rate (GFR) is well known in adults and children. We evaluated the revised Schwartz creatinine based estimated GFR (eGFR) prediction equation in Black African children in KwaZulu-Natal, South Africa. Methods Review of medical records of all Black African patients aged 2-18 years old who have had GFR determined by intravenous Technetium-99m-diethylene-triamine-pentaacetate((9)(9)(m)Tc DTPA), for the period 1 January 2010 to 31 December 2014 at the Inkosi Albert Luthuli Central Hospital (IALCH), Durban, South Africa was performed...
January 1, 2017: Annals of Clinical Biochemistry
https://www.readbyqxmd.com/read/28906028/graft-outcomes-following-diagnosis-of-post-transplant-lymphoproliferative-disease-in-pediatric-kidney-recipients-a-retrospective-study
#8
Nele K Kanzelmeyer, Britta Maecker-Kolhoff, Henriette Zierhut, Christian Lerch, Murielle Verboom, Dieter Haffner, Lars Pape
Data related to graft outcomes following post-transplant lymphoproliferative disease (PTLD) in pediatric kidney transplantation are scarce. Data were analyzed retrospectively from 12 children (eight boys) for 3 years after diagnosis of PTLD, with a loss of follow-up after 2 years in two of 12. In all cases, intensity of immunosuppressive therapy was reduced, which switched from calcineurin inhibitor to a mammalian target of rapamycin (mTOR) inhibitor in ten cases. Nine children were treated with six doses of rituximab according to the PED-PTLD-2005 protocol, with additional treatment in one child as per protocol...
September 14, 2017: Transplant International: Official Journal of the European Society for Organ Transplantation
https://www.readbyqxmd.com/read/28873129/association-of-serum-soluble-urokinase-receptor-levels-with-progression-of-kidney-disease-in-children
#9
Franz Schaefer, Howard Trachtman, Elke Wühl, Marietta Kirchner, Salim S Hayek, Ali Anarat, Ali Duzova, Sevgi Mir, Dusan Paripovic, Alev Yilmaz, Francesca Lugani, Klaus Arbeiter, Mieczyslaw Litwin, Jun Oh, Maria Chiara Matteucci, Jutta Gellermann, Simone Wygoda, Augustina Jankauskiene, Günter Klaus, Jiri Dusek, Sara Testa, Aleksandra Zurowska, Alberto Caldas Afonso, Melissa Tracy, Changli Wei, Sanja Sever, William Smoyer, Jochen Reiser
Importance: Conventional methods to diagnose and monitor chronic kidney disease (CKD) in children, such as creatinine level and cystatin C-derived estimated glomerular filtration rate (eGFR) and assessment of proteinuria in spot or timed urine samples, are of limited value in identifying patients at risk of progressive kidney function loss. Serum soluble urokinase receptor (suPAR) levels strongly predict incident CKD stage 3 in adults. Objective: To determine whether elevated suPAR levels are associated with renal disease progression in children with CKD...
September 5, 2017: JAMA Pediatrics
https://www.readbyqxmd.com/read/28846672/validation-of-serum-creatinine-based-formulae-in-pediatric-renal-transplant-recipients
#10
Omar Alkandari, Diane Hebert, Valerie Langlois, Lisa A Robinson, Rulan S Parekh
BackgroundAccurate monitoring of kidney function is important post-renal transplant; however, the routine use of measured glomerular filtration rate (GFR) or addition of newer serum markers is prohibitively expensive for routine clinical use, especially in children. We validated the modified Schwartz formula in pediatric renal transplant recipients across a range of demographic and clinical characteristics.MethodsIn a retrospective cohort study with nested cross-sectional analysis, we compared 505 measurements of estimated GFR using serum creatinine to simultaneous diethylenetriaminepentaacetic acid (DTPA) nuclear GFR (nGFR) measurements from 173 pediatric kidney transplant recipients who were < 18 years of age from 1 January 2001 to 31 December 2012 accounting for repeated measures...
December 2017: Pediatric Research
https://www.readbyqxmd.com/read/28792695/the-estimation-of-glomerular-filtration-rate-based-on-the-serum-cystatin-c-and-creatinine-values
#11
Elma Serezlija, Nafija Serdarevic, Lejla Begic
BACKGROUND: Renal insufficiency is one of the most serious renal diseases. Early diagnosis plays an essential role. Serum creatinine as a marker has had priority so far. The use of cystatin C for estimation of glomerular filtration rate has been recommended recently. There is a set of formulae which consolidates serum values of both creatinine and cystatin C. The study focuses on different formulae and their estimation for the purpose of better, faster, and more accurate diagnosis of renal insufficiency...
July 1, 2017: Clinical Laboratory
https://www.readbyqxmd.com/read/28706488/postnatal-maturation-of-the-glomerular-filtration-rate-in-conventional-growing-piglets-as-potential-juvenile-animal-model-for-preclinical-pharmaceutical-research
#12
Elke Gasthuys, Mathias Devreese, Joske Millecam, Stanislas Sys, Katrien Vanderperren, Joris Delanghe, Johan Vande Walle, Marjolein Heyndrickx, Siska Croubels
Adequate animal models are required to study the preclinical pharmacokinetics (PK), pharmacodynamics (PD) and safety of drugs in the pediatric subpopulation. Over the years, pigs were presented as a potential animal model, since they display a high degree of anatomical and physiological similarities with humans. To assess the suitability of piglets as a preclinical animal model for children, the ontogeny and maturation processes of several organ systems have to be unraveled and compared between both species...
2017: Frontiers in Pharmacology
https://www.readbyqxmd.com/read/28699888/predicting-augmented-renal-clearance-using-estimated-glomerular-filtration-rate-in-critically-ill-children%C3%A2
#13
Bongjin Lee, Jongyoon Kim, June Dong Park, Hyun Mi Kang, Yoon Sook Cho, Kwi Suk Kim
AIMS: Measured glomerular filtration rate (mGFR) is often used to identify augmented renal clearance (ARC). However, in the clinical setting, estimated GFR (eGFR) is obtained more quickly and inexpensively. We aimed to determine whether eGFR can identify ARC by evaluating the correlation between the eGFR and vancomycin trough level (VTL). MATERIALS AND METHODS: We retrospectively reviewed the records of patients aged ≤ 18 years who underwent vancomycin therapeutic drug monitoring at our tertiary hospital from July 2009 to June 2014...
September 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28683079/validation-of-glomerular-filtration-rate-estimating-equations-in-chinese-children
#14
Ke Zheng, Mengchun Gong, Yan Qin, Hongmei Song, Ximin Shi, Yuan Wu, Fang Li, Xuemei Li
BACKGROUND: Glomerular filtration rate (GFR) is essential for renal function evaluation and classification of chronic kidney disease (CKD), while the reference method in children are cumbersome. In the Chinese children, there was no data about GFR measured through plasma or renal clearance of the exogenous markers, and therefore no validated GFR-estimating tools in this population. METHODS: We measured GFR with double-sample plasma clearance of 99mTc-DTPA (mGFR) in 87 hospitalized children with renal injury...
2017: PloS One
https://www.readbyqxmd.com/read/28656614/automatic-renal-segmentation-for-mr-urography-using-3d-grabcut-and-random-forests
#15
Umit Yoruk, Brian A Hargreaves, Shreyas S Vasanawala
PURPOSE: To introduce and evaluate a fully automated renal segmentation technique for glomerular filtration rate (GFR) assessment in children. METHODS: An image segmentation method based on iterative graph cuts (GrabCut) was modified to work on time-resolved 3D dynamic contrast-enhanced MRI data sets. A random forest classifier was trained to further segment the renal tissue into cortex, medulla, and the collecting system. The algorithm was tested on 26 subjects and the segmentation results were compared to the manually drawn segmentation maps using the F1-score metric...
June 27, 2017: Magnetic Resonance in Medicine: Official Journal of the Society of Magnetic Resonance in Medicine
https://www.readbyqxmd.com/read/28601669/the-diagnostic-value-of-rescaled-renal-biomarkers-serum-creatinine-and-serum-cystatin-c-and-their-relation-with-measured-glomerular-filtration-rate
#16
Hans Pottel, Laurence Dubourg, Elke Schaeffner, 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, Sebastjan Bevc, Pierre Delanaye, Natalie Ebert
BACKGROUND: Serum creatinine (Scr) is the major contributing variable in glomerular filtration rate (GFR) estimating equations. Serum cystatin C (ScysC) based GFR estimating (eGFR)-equations have also been developed. The present study investigates the relation between 'rescaled' levels of these renal biomarkers (with reference interval of [0.67-1.33]) and measured GFR (mGFR). METHODS: We evaluated the diagnostic ability to detect impaired kidney function of the rescaled renal biomarkers in 8584 subjects from 12 cohorts with measured GFR, standardized Scr and ScysC...
August 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28593895/congenital-anomalies-of-the-kidney-and-urinary-tract-in-children-born-small-for-gestational-age
#17
Aleksandra Janchevska, Zoran Gucev, L Tasevska-Rmus, Velibor Tasic
INTRODUCTION: Congenital anomalies of the kidney and urinary tract (CAKUT) represent several types of malformations with occurrence of 1 in about 500 live births. OBJECTIVE: Small for gestation age (SGA) may influence in prevalence of CAKUT and progression of chronic kidney disease (CKD) in children. The aim of this study was to elaborate our experiences with detected CAKUT in a cohort of SGA born children in Macedonia. METHODS: Our cohort consisted of 100 SGA born children investigated for associated congenital anomalies of urinary tract...
March 1, 2017: Prilozi (Makedonska Akademija Na Naukite i Umetnostite. Oddelenie za Medicinski Nauki)
https://www.readbyqxmd.com/read/28549535/relationships-of-measured-iohexol-gfr-and-estimated-gfr-with-ckd-related-biomarkers-in-children-and-adolescents
#18
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...
September 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
#19
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
#20
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
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