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Creatinine clearance measurement

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https://www.readbyqxmd.com/read/28921624/pharmacodynamics-and-pharmacokinetics-of-ticagrelor-versus-clopidogrel-in-patients-with-acute-coronary-syndromes-and-chronic-kidney-disease
#1
Heyang Wang, Jing Qi, Yi Li, Yunbiao Tang, Chao Li, Jing Li, Yaling Han
BACKGROUND: Pivotal clinical trials found ticagrelor reduced ischemic complications to a greater extent than clopidogrel and what is more, the benefit gradually increased with the reduction on creatinine clearance. However, the underlying mechanisms remains poorly explored. METHODS: This is a single-center, prospective, randomized clinical trial involving 60 hospitalized P2Y12 inhibitor naïve patients with CKD (eGFR<60ml/min/1.73m(2) ) and NSTE-ACS. Eligible patients were randomly assigned in a 1:1 ratio to receive ticagrelor(180 mg loading dose, then 90 mg twice daily followed) or clopidogrel(600 mg loading dose, then 75 mg qd followed)...
September 15, 2017: British Journal of Clinical Pharmacology
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
#2
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/28889825/enhancement-of-diuresis-with-metolazone-in-infant-paediatric-cardiac-intensive-care-patients
#3
Russell T Wise, Brady S Moffett, Ayse Akcan-Arikan, Marianne Galati, Natasha Afonso, Paul A Checchia
BACKGROUND: Few data are available regarding the use of metolazone in infants in cardiac intensive care. Researchers need to carry out further evaluation to characterise the effects of this treatment in this population. METHODS: This is a descriptive, retrospective study carried out in patients less than a year old. These infants had received metolazone over a 2-year period in the paediatric cardiac intensive care unit at our institution. The primary goal was to measure the change in urine output from 24 hours before the start of metolazone therapy to 24 hours after...
September 11, 2017: Cardiology in the Young
https://www.readbyqxmd.com/read/28887027/accurate-egfr-reporting-for-children-without-anthropometric-data
#4
Emil den Bakker, Reinoud Gemke, Joanna A E van Wijk, Isabelle Hubeek, Birgit Stoffel-Wagner, Anders Grubb, Arend Bökenkamp
INTRODUCTION: Reporting estimated glomerular filtration rate (eGFR) instead of serum concentrations is advised in current guidelines. Most creatinine-based eGFR equations for children require height, a parameter not readily available to laboratories. Combining height-dependent creatinine- and cystatin C-based eGFR improves performance. Recently, a height-independent creatinine-based eGFR equation has been developed. AIM: To compare the combination of height-independent creatinine- and cystatin C-based equations with a combination of equations using anthropometric data...
September 6, 2017: Clinica Chimica Acta; International Journal of Clinical Chemistry
https://www.readbyqxmd.com/read/28860791/soluble-st2-correlates-with-some-indicators-of-right-ventricular-function-in-hypertensive-heart-failure
#5
Dike B Ojji, Sandrine Lecour, Olusoji M Adeyemi, Karen Sliwa
PURPOSE: ST2 receptor, which is a member of the Toll-like/interleukin-1 (IL-1) receptor family, has been found to be increased in the serum of patients 1 day after myocardial infarction. Several other studies have shown that soluble ST2 levels correlate with severity of heart failure (HF), left ventricular ejection fraction, creatinine clearance, B-type natriuretic peptide and C-reactive protein, and are predictors of mortality in HF. Most of these studies were not only limited to ischemic heart disease but also concentrated on left-sided HF...
2017: Vascular Health and Risk Management
https://www.readbyqxmd.com/read/28856234/evaluation-of-cystatin-c-in-malignancy-and-comparability-of-estimates-of-gfr-in-oncology-patients
#6
Melissa Jones, Stephanie Denieffe, Ciara Griffin, Willard Tinago, Maria C Fitzgibbon
OBJECTIVES: Creatinine is the biomarker of choice for use in estimates of kidney function in oncology patients. However as non-renal factors such as muscle mass can influence creatinine concentrations, we evaluated cystatin C as an alternative biomarker and its incorporation in GFR estimating formulae in an oncology setting. Measured GFR is infrequently undertaken in adult clinical practice with the consequent reliance on calculated GFR for patient assessment. DESIGN AND METHODS: Cystatin C and creatinine concentrations were evaluated from 134 oncology patients prior to commencing chemotherapeutic cycles...
August 2017: Pract Lab Med
https://www.readbyqxmd.com/read/28856009/the-chronic-kidney-disease-water-intake-trial-protocol-of-a-randomized-controlled-trial
#7
William F Clark, Shih-Han Huang, Amit X Garg, Kerri Gallo, Andrew A House, Louise Moist, Matthew A Weir, Jessica M Sontrop
BACKGROUND: In observational studies, drinking more water associates with a slower rate of kidney function decline; whether the same is true in a randomized controlled trial is unknown. OBJECTIVE: To examine the 1-year effect of a higher vs usual water intake on estimated glomerular filtration rate (eGFR) in patients with chronic kidney disease. DESIGN: Parallel-group randomized controlled trial. SETTING: Nine centers in Ontario, Canada...
2017: Canadian Journal of Kidney Health and Disease
https://www.readbyqxmd.com/read/28853703/potential-pitfalls-in-estimating-renal-injury-by-kdigo-overcome-by-measuring-creatinine-clearance-in-acute-kidney-injury%C3%A2
#8
John Mellas
Acute kidney injury (AKI) is a common and serious condition frequently encountered in hospitalized patients. The severity of kidney injury is defined by the KDIGO criteria which attempt to establish the degree of renal impairment. These criteria do not measure actual creatinine clearance (K) but rather represents static measures of a dynamic process in AKI and are fraught with potential for false positives and negatives results. This paper, presented in an educational format, uses a new, unique, simple, and accurate method for estimating actual K in AKI utilizing urine creatinine excretion over an established time interval...
August 30, 2017: Clinical Nephrology
https://www.readbyqxmd.com/read/28842583/responses-of-renal-hemodynamics-and-tubular-functions-to-acute-sodium-glucose-cotransporter-2-inhibitor-administration-in-non-diabetic-anesthetized-rats
#9
Tuba M Ansary, Yoshihide Fujisawa, Asadur Rahman, Daisuke Nakano, Hirofumi Hitomi, Hideki Kobara, Tsutomu Masaki, Jens M Titze, Kento Kitada, Akira Nishiyama
The aim of this study is to examine the effects of acute administration of luseogliflozin, the sodium-glucose cotransporter 2 (SGLT2) inhibitor, on renal hemodynamics and tubular functions in anesthetized non-diabetic Sprague Dawley (SD) rats and 5/6 nephrectomized (Nx) SD rats. Renal blood flow (RBF), mean arterial pressure (MAP), and heart rate (HR) were continuously measured and urine was collected directly from the left ureter. Intraperitoneal injection of luseogliflozin (0.9 mg kg(-1)) did not change MAP, HR, RBF, or creatinine clearance (CrCl) in SD rats (n = 7)...
August 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28838440/ganciclovir-dosing-strategies-and-development-of-cytomegalovirus-resistance-in-a-kidney-transplant-recipient-a-case-report
#10
I A Echenique, D Beltran, L Ramirez-Ruiz, N Najafian, N Agrawal
In renal transplant recipients, delayed graft function and accompanying renal impairment may lead to therapeutic underexposure of valganciclovir. We describe a case of a cytomegalovirus (CMV)-seronegative kidney transplant recipient from a CMV-seropositive donor, whose course was complicated during valganciclovir prophylaxis by CMV disease, ultimately progressing to ganciclovir, foscarnet, and cidofovir resistance. Assessments and adjustments for renal dysfunction, according to both Cockgroft-Gault and Modification of Diet in Renal Disease study equations, are described...
September 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28832411/hair-levels-of-prep-drugs-measure-adherence-and-are-associated-with-renal-decline-among-men-transwomen-in-an-open-label-prep-study
#11
Monica Gandhi, Pamela M Murnane, Peter Bacchetti, Richard Elion, Michael A Kolber, Stephanie E Cohen, Howard Horng, Alexander Louie, Karen Kuncze, Catherine A Koss, Peter L Anderson, Susan Buchbinder, Albert Liu
OBJECTIVE: The U.S. PrEP Demonstration Project (Demo) evaluated men-who-have-sex-with-men on pre-exposure prophylaxis (PrEP) post-marketing and found low seroconversion rates. The objective of this study is to examine hair levels as an adherence measure to PrEP. DESIGN: Using an "opt-in" design, participants of PrEP Demo were invited to enroll into a substudy where hair was collected quarterly. METHODS: Tenofovir concentrations were measured in hair by liquid-chromatography/tandem-mass-spectrometry...
August 21, 2017: AIDS
https://www.readbyqxmd.com/read/28828710/cisplatin-induced-human-peripheral-blood-mononuclear-cells-oxidative-stress-and-nephrotoxicity-in-head-and-neck-cancer-patients-the-influence-of-hydrogen-peroxide
#12
Júlia C F Quintanilha, Marília B Visacri, Vanessa M Sousa, Larissa B Bastos, Camila O Vaz, João P O Guarnieri, Laís S Amaral, Carina Malaguti, Carmen S P Lima, Anibal E Vercesi, Patricia Moriel
Cisplatin is a widely used antineoplastic agent in the treatment of head and neck cancer. However, it is highly nephrotoxic. Oxidative stress is the main mechanism responsible for cisplatin-induced nephrotoxicity. The aim of this study was to characterize cisplatin-induced nephrotoxicity, oxidative stress in peripheral blood mononuclear cells, and the relationship between them. Twenty-four patients were included in the study. Patients had their blood collected prior to cisplatin administration, and 5 and 20 days after initiating therapy, to assess renal function and to determine oxidative stress with MitoSOX™Red, H2DCF-DA, and Amplex(®) Red tests...
August 21, 2017: Molecular and Cellular Biochemistry
https://www.readbyqxmd.com/read/28821169/predictors-of-pre-procedural-concentrations-of-direct-oral-anticoagulants-a-prospective-multicentre-study
#13
Anne Godier, Anne-Sophie Dincq, Anne-Céline Martin, Adrian Radu, Isabelle Leblanc, Marion Antona, Marc Vasse, Jean-Louis Golmard, François Mullier, Isabelle Gouin-Thibault
Aims: Patients receiving direct oral anticoagulants (DOACs) frequently undergo elective invasive procedures. Their management is challenging. We aimed to determine the optimal duration of DOAC discontinuation that ensures a minimal anticoagulant effect during the procedure. Methods and results: This prospective multicentre study included 422 DOAC-treated patients requiring an invasive procedure. Pre-procedural DOAC concentration ([DOAC]) and routine haemostasis assays were performed to determine i/the proportion of patients who achieved a minimal pre-procedural [DOAC] (≤30 ng/mL) according to the duration of DOAC discontinuation, ii/the predictors of minimal [DOAC] and, iii/the ability of routine assays to predict minimal [DOAC]...
August 14, 2017: European Heart Journal
https://www.readbyqxmd.com/read/28815425/methodological-study-of-vancomycin-dosing-in-elderly-patients-using-actual-serum-creatinine-versus-rounded-serum-creatinine
#14
Tramaine Young, Matt Daniel, Stephanie Baumhover, Duke Eidson, Jane Green
PURPOSE: The practice of intentional rounding up of serum creatinine (SCr) in elderly patients with low measured values can lead to an underestimation of creatinine clearance and subsequent inaccurate dosing of medications. Thus, the purpose of this study was to evaluate the accuracy of vancomycin dose calculations for patients aged ≥65 years using an SCr rounded up to 1 mg/dL versus actual SCr. METHODS: This study compared the difference between measured steady-state vancomycin trough concentrations with predicted trough concentrations that have been calculated using rounded SCr and actual SCr...
August 16, 2017: Drugs in R&D
https://www.readbyqxmd.com/read/28801938/factors-in-variability-of-serial-gabapentin-concentrations-in-elderly-patients-with-epilepsy
#15
Jeannine M Conway, Lynn E Eberly, Joseph F Collins, Flavia M Macias, R Eugene Ramsay, Ilo E Leppik, Angela K Birnbaum
OBJECTIVES: To characterize and quantify the variability of serial gabapentin concentrations in elderly patients with epilepsy. METHODS: This study included 83 patients (age ≥60 years) from an 18-center, randomized, double-blind, double dummy, parallel study from the Veterans Affairs Cooperative 428 Study. All patients were taking 1500 mg/day of gabapentin. Within-person coefficient of variation (CV) in gabapentin concentrations, measured weekly to bimonthly for up to 52 weeks, then quarterly, was computed...
August 12, 2017: Pharmacotherapy
https://www.readbyqxmd.com/read/28801680/population-pharmacokinetics-of-peginterferon-%C3%AE-2a-in-patients-with-chronic-hepatitis-b
#16
Jingfeng Bi, Xingang Li, Jia Liu, Dawei Chen, Shuo Li, Jun Hou, Yuxia Zhou, Shanwei Zhu, Zhigang Zhao, Enqiang Qin, Zhenman Wei
There were significant differences in response and pharmacokinetic characteristics to the peginterferon α2a treatment among Chronic Hepatitis B (CHB) patients. The aim of this study is to identify factors which could significantly impact the peginterferon α2a pharmacokinetic characteristics in CHB patients. There were 208 blood samples collected from 178 patients who were considered as CHB and had been treated with peginterferon α2a followed by blood concentration measurement and other laboratory tests. The covariates such as demographic and clinical characteristics of the patients were retrieved from medical records...
August 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28801477/type-2-diabetes-mellitus-and-impaired-renal-function-are-associated-with-brain-alterations-and-poststroke-cognitive-decline
#17
Einor Ben Assayag, Roy Eldor, Amos D Korczyn, Efrat Kliper, Shani Shenhar-Tsarfaty, Oren Tene, Jeremy Molad, Itzhak Shapira, Shlomo Berliner, Viki Volfson, Ludmila Shopin, Yehuda Strauss, Hen Hallevi, Natan M Bornstein, Eitan Auriel
BACKGROUND AND PURPOSE: Type 2 diabetes mellitus (T2DM) is associated with diseases of the brain, kidney, and vasculature. However, the relationship between T2DM, chronic kidney disease, brain alterations, and cognitive function after stroke is unknown. We aimed to evaluate the inter-relationship between T2DM, impaired renal function, brain pathology on imaging, and cognitive decline in a longitudinal poststroke cohort. METHODS: The TABASCO (Tel Aviv brain acute stroke cohort) is a prospective cohort of stroke/transient ischemic attack survivors...
August 11, 2017: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/28795146/refining-the-policy-for-timing-of-kidney-transplant-waitlist-qualification
#18
Benjamin J Lee, Charles E McCulloch, Barbara A Grimes, Sindhu Chandran, Isabel Elaine Allen, Cynthia Delgado, Chi-Yuan Hsu
BACKGROUND: Earlier qualification for the kidney transplant waitlist expedites transplant and is therefore associated with improved outcomes. U.S. Organ Procurement and Transplantation Network policies state that "measured or calculated creatinine clearance or glomerular filtration rate less than or equal to 20 mL/min" triggers waitlist time accrual. The choice of qualification method is somewhat arbitrary, and the policy implies that decline in renal function is monotonic. METHODS: (1) We used survival analysis to quantify temporal differences in waitlist qualification by applying 3 kidney-function-estimating equations (Cockcroft-Gault, Modification of Diet in Renal Disease study, Chronic Kidney Disease Epidemiology Collaboration) to serial creatinine measurements from 3 patient cohorts: 1 of waitlisted patients at a major U...
August 2017: Transplantation Direct
https://www.readbyqxmd.com/read/28791494/adherence-with-perindopril-therapy-a-pilot-study-using-therapeutic-drug-monitoring-of-perindoprilat-and-an-evaluation-of-the-clearance-estimation
#19
Martin Šíma, Martin Vodička, Věra Marešová, Tomáš Šálek, Radomír Čabala, Ondřej Slanař
Background Although measurement of drug serum levels is an objective direct method for testing compliance, it can be distorted by "white-coat compliance" or by variations in drug elimination. Objective The aim of this prospective study was to evaluate the prevalence of noncompliance with perindopril therapy in adult out-patients using pharmacokinetic simulations. The additional aim was to compare the predictive performance of two glomerular filtration rate markers-creatinine and cystatin C. Setting Department of Cardiology, Tomas Bata Regional Hospital in Zlín, Czech Republic...
August 8, 2017: International Journal of Clinical Pharmacy
https://www.readbyqxmd.com/read/28761233/measured-glomerular-filtration-rate-at-dialysis-initiation-and-clinical-outcomes-of-indian-peritoneal-dialysis-patients
#20
N Prasad, M R Patel, A Chandra, D Rangaswamy, A Sinha, D Bhadauria, R K Sharma, A Kaul, A Gupta
The optimal time for dialysis initiation remains controversial. Studies have failed to show better outcomes with early initiation of hemodialysis; even a few had shown increased adverse outcomes including poorer survival. Few studies have examined the same in patients on peritoneal dialysis (PD). Measured glomerular filtration rate (mGFR) not creatinine-based estimated GFR is recommended as the measure of kidney function in end-stage renal disease (ESRD) patients. The objective of this observational study was to compare the outcomes of Indian patients initiated on PD with different residual renal function (RRF) as measured by 24-h urinary clearance method...
July 2017: Indian Journal of Nephrology
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