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Hemodialyzers

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https://www.readbyqxmd.com/read/29341167/the-influence-of-colloid-osmotic-pressure-on-hydrostatic-pressures-in-high-and-low-flux-hemodialyzers
#1
Daniel Schneditz, Georgios Sarikakis, Maria Kontodima, Notburga Sauseng
The aim of this study was to examine the relationship between hydrostatic trans-membrane pressure (TMPh ) and colloid osmotic pressure (COP) in low-flux (LF) and high-flux (HF) dialyzers. Hydrostatic pressures were measured in dialyzers distinguished by their ultrafiltration coefficient Kuf (16 and 85 mL/h/mm Hg) under constant dialysate flow and variable blood flow (Qb ) ranging from 0 to 400 mL/min using (i) alginate (70 kDa) dissolved in dialysate, (ii) diluted, undiluted, and concentrated plasma, or (iii) whole blood at different hematocrit, all in absence of ultrafiltration (UF)...
January 17, 2018: Artificial Organs
https://www.readbyqxmd.com/read/29324682/malnutrition-inflammation-atherosclerosis-syndrome-mia-and-diet-recommendations-among-end-stage-renal-disease-patients-treated-with-maintenance-hemodialysis
#2
Małgorzata Maraj, Beata Kuśnierz-Cabala, Paulina Dumnicka, Agnieszka Gala-Błądzińska, Katarzyna Gawlik, Dorota Pawlica-Gosiewska, Anna Ząbek-Adamska, Małgorzata Mazur-Laskowska, Piotr Ceranowicz, Marek Kuźniewski
Malnutrition-inflammation-atherosclerosis syndrome is one of the causes of increased mortality in chronic kidney disease (CKD). The aim of the study was to assess the inflammation and nutritional status of patients in end-stage kidney disease treated with maintenance hemodialysis. The study included a group of 98 hemodialyzed patients with stage 5 CKD (38 women and 60 men). Albumin, prealbumin (PRE), and C-reactive protein (CRP) were measured in serum samples collected before mid-week dialysis. Fruit and vegetables frequency intakes were assessed with a questionnaire...
January 11, 2018: Nutrients
https://www.readbyqxmd.com/read/29296087/examining-hemodialyzer-membrane-performance-using-proteomic-technologies
#3
REVIEW
Mario Bonomini, Luisa Pieroni, Lorenzo Di Liberato, Vittorio Sirolli, Andrea Urbani
The success and the quality of hemodialysis therapy are mainly related to both clearance and biocompatibility properties of the artificial membrane packed in the hemodialyzer. Performance of a membrane is strongly influenced by its interaction with the plasma protein repertoire during the extracorporeal procedure. Recognition that a number of medium-high molecular weight solutes, including proteins and protein-bound molecules, are potentially toxic has prompted the development of more permeable membranes. Such membrane engineering, however, may cause loss of vital proteins, with membrane removal being nonspecific...
2018: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/29193165/precise-quantitative-assessment-of-the-clinical-performances-of-two-high-flux-polysulfone-hemodialyzers-in-hemodialysis-validation-of-a-blood-based-simple-kinetic-model-versus-direct-dialysis-quantification
#4
Paik-Seong Lim, Yuyu Lin, Minfeng Chen, Xiaoqi Xu, Yun Shi, Sudhir Bowry, Bernard Canaud
Highly permeable dialysis membranes with better design filters have contributed to improved solute removal and dialysis efficacy. However, solute membrane permeability needs to be well controlled to avoid increased loss of albumin that is considered to be detrimental for dialysis patients. A novel high-flux dialyzer type (FX CorDiax; Fresenius Medical Care) incorporating an advanced polysulfone membrane modified with nano-controlled spinning technology to enhance the elimination of a broader spectrum of uremic toxins has been released...
November 27, 2017: Artificial Organs
https://www.readbyqxmd.com/read/29159509/the-role-of-socio-demographic-factors-in-depression-and-anxiety-of-patients-on-hemodialysis-an-observational-cross-sectional-study
#5
G Gerogianni, E Lianos, A Kouzoupis, M Polikandrioti, E Grapsa
PURPOSE: Depression and anxiety have high prevalence in patients on hemodialysis and are strongly associated with socio-economic factors. The aim of this study was to evaluate the prevalence of depression and anxiety in hemodialyzed patients in Greece and its association with socio-demographic factors. METHODS: Four hundred and fourteen (414) patients on hemodialysis (262 males and 152 females) from 24 dialysis centers in Greece participated in this observational cross-sectional study...
November 20, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/29144096/long-term-treatment-with-etanercept-monotherapy-in-a-hemodialyzed-patient-with-moderate-to-severe-plaque-type-psoriasis-and-psoriatic-arthritis
#6
Graziella Babino, Maria Esposito, Luca Bianchi, Alessandro Giunta
No abstract text is available yet for this article.
November 16, 2017: Giornale Italiano di Dermatologia e Venereologia: Organo Ufficiale, Società Italiana di Dermatologia e Sifilografia
https://www.readbyqxmd.com/read/29109360/investigation-of-the-pronounced-erythropoietin-induced-reduction-in-hyperglycemia-in-type-1-like-diabetic-rats
#7
Shu-Chun Kuo, Yingxiao Li, Kai-Chun Cheng, Chiang-Shan Niu, Juei-Tang Cheng, Ho-Shan Niu
Erythropoietin (EPO) is known to stimulate erythropoiesis after binding with its specific receptor. In clinics, EPO is widely used in hemodialyzed patients with diabetes. However, changes in the expression of the erythropoietin receptor (EPOR) under diabetic conditions are still unclear. Therefore, we investigated EPOR expression both in vivo and in vitro. Streptozotocin-induced type 1-like diabetic rats (STZ rats) were used to evaluate the blood glucose-lowering effects of EPO. The expression and activity of the transducer and activator of transcription 3 (STAT3), the potential signaling molecule, was investigated in cultured rat skeletal myoblast (L6) cells incubated in high-glucose (HG) medium to mimic the in vivo changes...
November 3, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/29067238/lipid-disorders-in-patients-with-renal-failure-role-in-cardiovascular-events-and-progression-of-chronic-kidney-disease
#8
REVIEW
Luca Visconti, Salvatore Benvenga, Antonio Lacquaniti, Valeria Cernaro, Annamaria Bruzzese, Giovanni Conti, Michele Buemi, Domenico Santoro
The spectrum of lipid disorders in chronic kidney disease (CKD) is usually characterized by high triglycerides and reduced high dense lipoprotein (HDL), associated with normal or slightly reduced low dense lipoprotein (LDL)-cholesterol. This dyslipidemia is associated with an increased risk for atherosclerotic cardiovascular disease. Keys for the cardiovascular risk reduction in these patients are lowering the number and modifying the composition of the cholesterol-carrying atherogenic lipoprotein particles...
December 2016: Journal of Clinical & Translational Endocrinology
https://www.readbyqxmd.com/read/29039068/the-effect-of-scan-interval-and-bolus-length-on-the-quantitative-accuracy-of-cerebral-computed-tomography-perfusion-analysis-using-a-hollow-fiber-phantom
#9
Hiroyuki Hashimoto, Kazufumi Suzuki, Eiji Okaniwa, Hiroshi Iimura, Kayoko Abe, Shuji Sakai
The shuttle scan technique is expected to extend scan range in cerebral computed tomography (CT) perfusion by 16- or 64-row multidetector CT (MDCT), but it may affect quantitative accuracy. This study aims to evaluate the effect of long scan interval and bolus length on the quantitative accuracy of perfusion indices using an innovative hollow-fiber phantom.We used an originally developed hollow-fiber hemodialyzer covered with polyurethane resin as a perfusion phantom. We scanned the phantom during various scan intervals (1-13 s) and bolus injection lengths (5, 10, 15, and 20 s), and evaluated cerebral blood flow (CBF), cerebral blood volume (CBV), mean transit time (MTT), and time-to-peak (TTP)...
October 16, 2017: Radiological Physics and Technology
https://www.readbyqxmd.com/read/29039060/the-incidence-of-urinary-tract-cancers-is-related-to-preserved-diuresis-a-single-center-report
#10
Vedran Premuzic, Marija Gamulin, Marijana Coric, Bojan Jelakovic
PURPOSE: Residual diuresis progressively decreases with longer dialysis vintage, and higher incidence of renal and urinary tract cancers was often observed in hemodialyzed patients compared to the general population so we hypothesized that patients without preserved residual diuresis have higher risk of renal and urinary tract cancers than patients with preserved residual diuresis. METHODS: Retrospective clinical data and pathology reports were completed for 307 uremic patients undergoing chronic hemodialysis...
December 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/29024501/hemodialysis-decreases-the-concentration-of-accumulated-plant-phenols-in-the-plasma-of-patients-on-maintenance-dialysis-influence-of-residual-renal-function
#11
Piotr Jan Nowak, Radoslaw Wilk, Anna Prymont-Przyminska, Anna Zwolinska, Agata Sarniak, Anna Wlodarczyk, Jeffrey de Graft-Johnson, Beata Mamelka, Anna Zasowska-Nowak, Piotr Bartnicki, Dariusz Nowak, Michal Nowicki
Plant phenols may accumulate in end-stage kidney disease. The effect of hemodialysis on their plasma concentration remains poorly determined. Contingent on concentration, health-promoting or noxious effects occur; therefore, we assessed plasma concentration in hemodialyzed patients. In total, 21 maintenance hemodialyzed patients with diuresis < 500 mL per day (with oliguria), nine hemodialyzed patients with diuresis ≥ 500 mL per day (without oliguria) and 31 healthy volunteers were included. Nine phenolic acids were identified with high-performance liquid chromatography and total polyphenol concentration was determined with the Folin-Ciocalteu method in pre- or post-hemodialysis plasma and pre- or intra-hemodialysis dialysate...
October 11, 2017: Therapeutic Apheresis and Dialysis
https://www.readbyqxmd.com/read/28974744/variations-of-parathyroid-hormone-and-bone-biomarkers-are-concordant-only-after-a-long-term-follow-up-in-hemodialyzed-patients
#12
Pierre Delanaye, Xavier Warling, Martial Moonen, Nicole Smelten, François Jouret, Jean-Marie Krzesinski, Nicolas Maillard, Hans Pottel, Etienne Cavalier
End-stage renal disease is associated with mineral and bone disorders. Guidelines recommending therapies should be based on serial assessments of biomarkers, and thus on variations (Δ), rather than scattered values. We analyzed the correlations between ΔPTH and Δbone biomarkers such as bone-specific alkaline phosphatase (b-ALP), Beta-CrossLaps (CTX), osteocalcin, intact serum procollagen type-1 N-propeptide (P1NP), and tartrate-resistant acid phosphatase 5B (TRAP-5B) at different time-points. In this prospective observational analysis, variations of biomarkers were followed after 6-week (n = 129), 6-month (n = 108) and one-year (n = 93) period...
October 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28968013/detection-of-trypanosoma-cruzi-antibodies-in-multitransfused-patients-in-colombia
#13
Mauricio Beltrán, Andrea Herrera, Astrid Carolina Flórez, Maritza Berrio, María Isabel Bermúdez
INTRODUCTION: Chagas disease is a public health problem in Latin America. Even though vector-borne infection is the most important transmission mode for this disease, other modes such as transfusions require evaluation. OBJECTIVE: To describe the prevalence of T. cruzi infection in multitransfused patients. MATERIALS AND METHODS: We detected IgG antibodies against T. cruzi by two immunoassays in samples from multitransfused patients in four hospitals located in Bogotá and Medellín, Colombia...
September 1, 2017: Biomédica: Revista del Instituto Nacional de Salud
https://www.readbyqxmd.com/read/28953816/association-between-depression-and-hemodialysis-in-patients-with-chronic-kidney-disease
#14
Aleksandra Ćwiek, Marcelina Czok, Bartłomiej Kurczab, Krzysztof Kramarczyk, Karolina Drzyzga, Krzysztof Kucia
Depression is the most common and serious psychiatric disorder that affects patients with chronic kidney disease and end-stage renal disease, and, has a significant impact on their quality of life. The aim of this study was to investigate and compare prevalence rates of depression among hemodialyzed patients, and non-dialyzed patients with a glomerular filtration rate<30 ml/min/1.73m(2) receiving conservative treatment or following kidney transplantation. A total of 50 hemodialyzed and 50 non-dialyzed patients with stage 4/5 of CKD was assessed using the following questionnaires: Hamilton Anxiety Rating Scale (HAM-A), Hamilton Depression Rating Scale (HAM-D), The Satisfaction with Life Scale (SWLS), The Acceptance of Illness Scale (AIS), and The Life Orientation Test-Revised (LOT-R)...
September 2017: Psychiatria Danubina
https://www.readbyqxmd.com/read/28910796/modeling-of-internal-filtration-in-theranova-hemodialyzers
#15
Anna Lorenzin, Mauro Neri, William R Clark, Francesco Garzotto, Alessandra Brendolan, Federico Nalesso, Nicola Marchionna, Monica Zanella, Marco Sartori, Gianfranco B Fiore, Claudio Ronco
High retention onset (HRO) is the designation for a new class of hemodialysis membranes. A unique characteristic of this class is the highly selective and controlled porosity resulting in sieving properties that provide a clinically desirable balance between middle/large molecular weight solute removal and albumin loss. Another defining feature of this membrane class is the relatively small fiber diameter, which produces high convective volumes in the form of internal filtration. The aim of the present study was to estimate, by semi-empirical methods, convective volumes for 2 new HRO dialyzers: Theranova 400 and Theranova 500 (Baxter International Inc...
2017: Contributions to Nephrology
https://www.readbyqxmd.com/read/28790832/combination-of-sofosbuvir-and-daclatasvir-in-the-treatment-of-genotype-3-chronic-hepatitis-c-virus-infection-in-patients-on-maintenance-hemodialysis
#16
Jan Sperl, Sona Frankova, Miluse Kreidlova, Dusan Merta, Monika Tothova, Julius Spicak
Chronic hepatitis C virus infection (HCV) has a negative impact on the long-term survival of recipients of kidney transplants. HCV should be treated in hemodialyzed patients before their enlistment for kidney transplantation in order to avoid the reactivation of virus after transplantation. Direct-acting antivirals represent the current standard of care in hemodialyzed patients with HCV genotypes 1 and 4; in patients with genotypes 2 or 3, the optimal regimen is yet to be established. Sofosbuvir (SOF) and daclatasvir (DCV) represent an antiviral pangenotypic regimen with favorable pharmacokinetics in hemodialyzed patients...
2017: Therapeutics and Clinical Risk Management
https://www.readbyqxmd.com/read/28777393/hemodialysis-membrane-coated-with-a-polymer-having-a-hydrophilic-blood-contacting-layer-can-enhance-diffusional-performance
#17
Masashi Tagaya, Saki Nagoshi, Morihiro Matsuda, Shunsuke Takahashi, Shinya Okano, Kazunobu Hara
PURPOSE: Currently, the foreign surfaces of various extracorporeal circulation devices are coated with a biocompatible polymer coating agent (BPA), which creates a hydrophilic blood-contacting layer to reduce thrombogenicity, while the membranes in hemodialyzers are not. We aimed to clarify other side effects of BPA-coated membranes by examining the diffusion performance in in vitro experiments. METHODS: We used a polyethersulfone membrane (sieving coefficient of albumin is ≤0...
August 2, 2017: International Journal of Artificial Organs
https://www.readbyqxmd.com/read/28636168/improved-hemodialysis-with-hemocompatible-polyethersulfone-hollow-fiber-membranes-in-vitro-performance
#18
Surendra Kumar Verma, Akshay Modi, Atul Kumar Singh, Rohit Teotia, Jayesh Bellare
We show that addition of nanozeolite (NZ) and vitamin E D-α-Tocopherol polyethylene glycol succinate (TPGS or T) considerably improves the performance of polyethersulfone (PES or P) hollow fiber membrane (HFM) for hemodialysis. Nanocomposite HFMs were manufactured using PES as a polymer, TPGS as an additive and NZ as a filler to give a composite membrane called PT-NZ. HFMs were spun by dry-wet spinning principle based on liquid-liquid phase separation. TPGS and NZ were successfully incorporated in HFMs, as confirmed by EDX elemental mapping...
June 21, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28614373/relationship-between-microrna-146a-expression-and-plasma-renalase-levels-in-hemodialyzed-patients
#19
Marcin Dziedzic, Tomasz Powrózek, Ewelina Orłowska, Wojciech Koch, Wirginia Kukula-Koch, Kinga Gaweł, Anna Bednarek-Skublewska, Teresa Małecka-Massalska, Janusz Milanowski, Beata Petkowicz, Janusz Solski
BACKGROUND: microRNA (miRNA) belongs to the non-coding RNAs family responsible for the regulation of gene expression. Renalase is a protein composed of 342 amino acids, secreted by the kidneys and possibly plays an important role in the regulation of sympathetic tone and blood pressure. The aim of the present study was to investigate plasma renalase concentration, and explore the relationship between miRNA-146a-5p expression and plasma renalase levels in hemodialyzed patients. METHODS: The study population comprised 55 subjects who succumbed to various cardiac events, 27 women and 28 men, aged 65-70 years...
2017: PloS One
https://www.readbyqxmd.com/read/28601713/a-laplace-transform-based-technique-for-solving-multiscale-and-multidomain-problems-application-to-a-countercurrent-hemodialyzer-model
#20
Laurent Simon
An integral-based method was employed to evaluate the behavior of a countercurrent hemodialyzer model. Solute transfer from the blood into the dialysate was described by writing mass balance equations over a section of the device. The approach provided Laplace transform concentration profiles on both sides of the membrane. Applications of the final value theorem led to the development of the effective time constants and steady-state concentrations in the exit streams. Transient responses were derived by a numerical inversion algorithm...
August 1, 2017: Computers in Biology and Medicine
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