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https://www.readbyqxmd.com/read/28530202/effect-of-age-and-blood-pressure-on-determination-of-normal-fluid-status-in-a-general-population-using-whole-body-and-calf-bioimpedance-techniques
#1
Fansan Zhu, Samer R Abbas, Peter Kotanko, Nathan W Levin
Normal fluid status (dry weight) can be identified by hydration markers established in the healthy population. The general population average could be influenced by age with its accompanying physiological changes and/or illness. The aims of this study were (1) to evaluate the effect of age and systolic blood pressure (SBP) on these markers; (2) to compare mean values of hydration markers as assessed by different bioimpedance techniques. Subjects from the general population (n  =  212, males 105, 57...
June 2017: Physiological Measurement
https://www.readbyqxmd.com/read/28514783/dialysis-access-as-an-area-of-improvement-in-elderly-incident-hemodialysis-patients-results-from-a-cohort-study-from-the-international-monitoring-dialysis-outcomes-initiative
#2
Jochen G Raimann, Claudia Barth, Len A Usvyat, Priscila Preciado, Bernard Canaud, Michael Etter, Xiaoqi Xu, Adrian Guinsburg, Christina Marelli, Neill Duncan, Albert Power, Frank M van der Sande, Jeroen P Kooman, Stephan Thijssen, Yuedong Wang, Peter Kotanko
BACKGROUND: Commencing hemodialysis (HD) using a catheter is associated with a higher risk of adverse outcomes, and early conversion from central-venous catheter (CVC) to arteriovenous fistula/graft (non-CVC) improves outcomes. We investigated CVC prevalence and conversion, and their effects on outcomes during the first year of HD in a multinational cohort of elderly patients. METHODS: Patients ≥70 years from the MONDO Initiative who commenced HD between 2000 and 2010 in Asia-Pacific, Europe, North-, and South-America and survived at least 6 months were included in this investigation...
May 17, 2017: American Journal of Nephrology
https://www.readbyqxmd.com/read/28366444/tryptophan-and-kynurenine-levels-and-its-association-with-sleep-nonphysical-fatigue-and-depression-in-chronic-hemodialysis-patients
#3
Rakesh Malhotra, Vanja Persic, Weifang Zhang, Jill Brown, Xia Tao, Laura Rosales, Stephan Thijssen, Fredric O Finkelstein, Mark L Unruh, Alp Ikizler, Pranav S Garimella, Joachim H Ix, Jeroen Kooman, Nathan W Levin, Garry J Handelman, Peter Kotanko
OBJECTIVE: Sleep and mood disorders are common in hemodialysis (HD) patients and the pathophysiology is still unclear. Tryptophan (TRP) and its metabolites may play a prominent role in neural pathways related to sleep, fatigue, and depression. Here, we sought to compare the levels of TRP and its metabolites between HD patients and healthy subjects and examine their association with sleep, fatigue, and depression in HD patients. The design was cross-sectional analysis. SUBJECTS: Ninety-nine adult patients on stable thrice weekly HD schedule between September 2011 and March 2014 and 10 healthy controls...
March 30, 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/28324927/estimation-of-arterio-venous-access-blood-flow-in-hemodialysis-patients-using-video-image-processing-technique
#4
Fansan Zhu, Schantel Williams, Hannah Putnam, Israel Campos, Jie Ma, Camille Johnson, Franz Kappel, Peter Kotanko
Assessment of arterio-venous fistula (AVF) blood flow (ABF) is vital in hemodialysis (HD) patients. Currently, no non-invasive and contact-free technique is available to accurately measure ABF in routine clinical practice. In this study, we developed a novel approach using video image processing (VIP) to measure the change in optic flow in the skin. We the tested the hypothesis that the change in optical flow, expressed as the change in pixels between consecutive frames, is related to ABF. We recorded AVF videos in 40 HD patients using a digital camera and processed them by VIP technique...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28226474/estimation-of-arterio-venous-access-blood-flow-in-hemodialysis-patients-using-video-image-processing-technique
#5
Fansan Zhu, Schantel Williams, Hannah Putnam, Israel Campos, Jie Ma, Camille Johnson, Franz Kappel, Peter Kotanko, Fansan Zhu, Schantel Williams, Hannah Putnam, Israel Campos, Jie Ma, Camille Johnson, Franz Kappel, Peter Kotanko, Jie Ma, Israel Campos, Peter Kotanko, Schantel Williams, Franz Kappel, Fansan Zhu, Hannah Putnam, Camille Johnson
Assessment of arterio-venous fistula (AVF) blood flow (ABF) is vital in hemodialysis (HD) patients. Currently, no non-invasive and contact-free technique is available to accurately measure ABF in routine clinical practice. In this study, we developed a novel approach using video image processing (VIP) to measure the change in optic flow in the skin. We the tested the hypothesis that the change in optical flow, expressed as the change in pixels between consecutive frames, is related to ABF. We recorded AVF videos in 40 HD patients using a digital camera and processed them by VIP technique...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28209636/a-randomized-crossover-trial-of-dietary-sodium-restriction-in-stage-3-4-ckd
#6
Rajiv Saran, Robin L Padilla, Brenda W Gillespie, Michael Heung, Scott L Hummel, Vimal Kumar Derebail, Bertram Pitt, Nathan W Levin, Fansan Zhu, Samer R Abbas, Li Liu, Peter Kotanko, Philip Klemmer
BACKGROUND AND OBJECTIVES: Patients with chronic kidney disease (CKD) are often volume expanded and hypertensive. Few controlled studies have assessed the effects of a sodium-restricted diet (SRD) in CKD. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We conducted a randomized crossover trial to evaluate the effect of SRD (target <2 g sodium per day) versus usual diet on hydration status (by bioelectrical impedance spectroscopy) and blood pressure (BP) between May of 2009 and May of 2013...
March 7, 2017: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/28209335/impact-of-fluid-status-and-inflammation-and-their-interaction-on-survival-a-study-in-an-international-hemodialysis-patient-cohort
#7
Marijke J E Dekker, Daniele Marcelli, Bernard J Canaud, Paola Carioni, Yuedong Wang, Aileen Grassmann, Constantijn J A M Konings, Peter Kotanko, Karel M Leunissen, Nathan W Levin, Frank M van der Sande, Xiaoling Ye, Vaibhav Maheshwari, Len A Usvyat, Jeroen P Kooman
In hemodialysis patients extracellular fluid overload is a predictor of all-cause and cardiovascular mortality, and a relation with inflammation has been reported in previous studies. The magnitude and nature of this interaction and the effects of moderate fluid overload and extracellular fluid depletion on survival are still unclear. We present the results of an international cohort study in 8883 hemodialysis patients from the European MONDO initiative database where, during a three-month baseline period, fluid status was assessed using bioimpedance and inflammation by C-reactive protein...
May 2017: Kidney International
https://www.readbyqxmd.com/read/28114147/physical-activity-and-sleep-patterns-in-hemodialysis-patients-in-a-suburban-environment
#8
RANDOMIZED CONTROLLED TRIAL
Schantel Williams, Maggie Han, Xiaoling Ye, Hanjie Zhang, Anna Meyring-Wösten, Marcee Bonner, Candace Young, Stephan Thijssen, Daniel Marsh, Peter Kotanko
BACKGROUND/AIMS: Hemodialysis (HD) patients are less active than their healthy counterparts. They are often plagued with sleep disorders that affect the quality of their sleep. Our aim was to objectively quantify activity and sleep quality among HD patients in a suburban HD population. METHODS: Activity and sleep parameters were measured using a commercially available activity tracker in 29 HD patients from Baton Rouge, LA, USA. Patients in the feedback group received their activity and sleep data at each dialysis treatment...
2017: Blood Purification
https://www.readbyqxmd.com/read/28114138/plasma-gelsolin-and-its-association-with-mortality-and-hospitalization-in-chronic-hemodialysis-patients
#9
Cesar Flores Gama, Laura M Rosales, Georges Ouellet, Yanna Dou, Stephan Thijssen, Len Usvyat, Hanjie Zhang, Viktoriya Kuntsevich, Nathan W Levin, Peter Kotanko
BACKGROUND: Human plasma gelsolin (pGSN) is an actin-binding protein that is secreted into the extracellular fluid, with the skeletal muscle and myocardial tissues being its major source. Depletion of pGSN has been shown to be related to a variety of inflammatory and clinical conditions. METHODS: pGSN levels were prospectively determined in prevalent maintenance hemodialysis (HD) patients from 3 U.S. dialysis centers. Demographics (age, time since dialysis initiation, race, gender, body height and weight, comorbidities), inflammatory markers (C reactive protein, CRP; interleukin 6, IL-6), free triiodothyronine (fT3), and routine laboratory parameters were obtained...
2017: Blood Purification
https://www.readbyqxmd.com/read/28114136/correlation-between-inflammatory-biomarkers-and-red-blood-cell-life-span-in-chronic-hemodialysis-patients
#10
Jie Ma, Yanna Dou, Hanjie Zhang, Stephan Thijssen, Schantel Williams, Viktoriya Kuntsevich, Georges Ouellet, Michelle M Y Wong, Vanja Persic, Anja Kruse, Laura Rosales, Yuedong Wang, Nathan W Levin, Peter Kotanko
BACKGROUND AND OBJECTIVES: The pathogenesis of anemia in hemodialysis (HD) patients is dependent on multiple factors, with decreased red blood cell life span (RBCLS) being a significant contributor. Although the impact of reduced RBCLS on anemia is recognized, it is still a subject that is not well researched. The objective of this study was to investigate the relationship between RBCLS and inflammatory biomarkers in chronic HD patients. DESIGN, SETTING, PARTICIPANTS, AND MEASUREMENTS: RBCLS was calculated from alveolar carbon monoxide concentrations measured by gas chromatography...
2017: Blood Purification
https://www.readbyqxmd.com/read/28114135/preface
#11
Peter Kotanko, Laura Rosales, Claudio Ronco
No abstract text is available yet for this article.
2017: Blood Purification
https://www.readbyqxmd.com/read/27992875/calf-resistivity-values-in-chronic-kidney-disease-in-a-caucasian-population
#12
Eric Seibert, Stephan G Müller, Johanna Pattmöller, Peter Kotanko, Fansan Zhu, Nathan W Levin, Roman Fiedler, Martin K Kuhlmann, Matthias Girndt
BACKGROUND: Continuous intradialytic calf bioimpedance spectroscopy (cBIS) allows assessment of changes in calf extracellular fluid volume (ECV) to determine dry weight (DW) in hemodialysis patients. During dialysis, calf ECV decreases until excessive ECV has been removed and normalized resistivity ρN,5 rises to values comparable to those of a normal population (cBIS-DW). It is not clear whether chronic kidney disease (CKD) itself influences ρN,5 and whether normal values depend on race and ethnicity...
2017: Nephron
https://www.readbyqxmd.com/read/27831920/joint-model-for-mortality-and-hospitalization
#13
Yuqi Chen, Wensheng Guo, Peter Kotanko, Len Usvyat, Yuedong Wang
Modeling hospitalization is complicated because the follow-up time can be censored due to death. In this paper, we propose a shared frailty joint model for survival time and hospitalization. A random effect semi-parametric proportional hazard model is assumed for the survival time and conditional on the follow-up time, hospital admissions or total length of stay is modeled by a generalized linear model with a nonparametric offset function of the follow-up time. We assume that the hospitalization and the survival time are correlated through a latent subject-specific random frailty...
November 1, 2016: International Journal of Biostatistics
https://www.readbyqxmd.com/read/27666944/validating-body-fat-assessment-by-bioelectric-impedance-spectroscopy-in-taiwanese-hemodialysis-patients
#14
Paik Seong Lim, Chang Hsu Chen, Fansan Zhu, Peter Kotanko, Yachung Jeng, Chun Yu Hu, Li Shu Chiu, Hui-Chen Chang
OBJECTIVE: Obesity is becoming increasingly common in hemodialysis (HD) patients and is associated with inflammation and increased mortality. The primary aim of the present study was to evaluate the accuracy and variability of the bioimpedance device in measuring body fat in Taiwanese dialysis patients. DESIGN: Cross-sectional study. SUBJECTS: One hundred twenty-two adult patients receiving HD in a single hospital in Taiwan. SETTING: We compared the results of fat mass (FM) measured by dual-energy x-ray absorptiometry (DEXA) and bioelectrical impedance spectroscopy device (Body composition monitor, BCM)...
January 2017: Journal of Renal Nutrition
https://www.readbyqxmd.com/read/27619554/plasma-vitamin-c-levels-in-esrd-patients-and-occurrence-of-hypochromic-erythrocytes
#15
Eric Seibert, Anja Richter, Martin K Kuhlmann, Suxin Wang, Nathan W Levin, Peter Kotanko, Garry J Handelman
INTRODUCTION: The achievement of erythropoiesis in hemodialysis (HD) patients is typically managed with erythropoiesis-stimulating-agents (ESA's) and intravenous iron (IV-iron). Using this treatment strategy, HD patients frequently show an elevated fraction of red blood cells (RBC) with hemoglobin (Hb) content per cell that is below the normal range, called hypochromic RBC. The low Hb content per RBC is the result of the clinical challenge of providing sufficient iron content to the bone marrow during erythropoiesis...
April 2017: Hemodialysis International
https://www.readbyqxmd.com/read/27584927/techniques-for-assessing-fluids-status-in-patients-with-kidney-disease
#16
Fansan Zhu, Laura Rosales, Peter Kotanko
PURPOSE OF REVIEW: The aim of this article is to present current information on techniques for fluid status assessment in patients with kidney disease. The methods can be broadly categorized into biomarkers, ultrasound, blood volume monitoring, and bioimpedance. RECENT FINDINGS: Biomarkers including atrial natriuretic peptide and B-type natriuretic peptide have been shown to provide information about relative changes in fluid status. Ultrasound is applied to measure inferior vena cava indices, pulmonary indicators, and vascular indicators of fluid overload...
November 2016: Current Opinion in Nephrology and Hypertension
https://www.readbyqxmd.com/read/27510452/supportive-care-time-to-change-our-prognostic-tools-and-their-use-in-ckd
#17
Cécile Couchoud, Brenda Hemmelgarn, Peter Kotanko, Michael J Germain, Olivier Moranne, Sara N Davison
In using a patient-centered approach, neither a clinician nor a prognostic score can predict with absolute certainty how well a patient will do or how long he will live; however, validated prognostic scores may improve accuracy of prognostic estimates, thereby enhancing the ability of the clinicians to appreciate the individual burden of disease and the prognosis of their patients and inform them accordingly. They may also facilitate nephrologist's recommendation of dialysis services to those who may benefit and proposal of alternative care pathways that might better respect patients' values and goals to those who are unlikely to benefit...
October 7, 2016: Clinical Journal of the American Society of Nephrology: CJASN
https://www.readbyqxmd.com/read/27101378/saliva-urea-nitrogen-continuously-reflects-blood-urea-nitrogen-after-acute-kidney-injury-diagnosis-and-management-longitudinal-observational-data-from-a-collaborative-international-prospective-multicenter-study
#18
MULTICENTER STUDY
Jochen G Raimann, Viviane Calice-Silva, Stephan Thijssen, Fabiana Baggio Nerbass, Marcos A Vieira, Pascal Dabel, Rhys Evans, John Callegari, Mary Carter, Nathan W Levin, James F Winchester, Peter Kotanko, Roberto Pecoits-Filho
BACKGROUND: Acute kidney injury (AKI) is a growing global concern and often reversible. Saliva urea nitrogen (SUN) measured by a dipstick may allow rapid diagnosis. We studied longitudinal agreement between SUN and blood urea nitrogen (BUN) and the diagnostic performance of both. METHODS: Agreement between SUN and BUN and diagnostic performance to diagnose AKI severity in AKI patients in the United States and Brazil were studied. Bland-Altman analysis and linear mixed effects models were employed to test the agreement between SUN and BUN...
2016: Blood Purification
https://www.readbyqxmd.com/read/27094625/unraveling-the-relationship-between-mortality-hyponatremia-inflammation-and-malnutrition-in-hemodialysis-patients-results-from-the-international-mondo-initiative
#19
M J E Dekker, D Marcelli, B Canaud, C J A M Konings, K M Leunissen, N W Levin, P Carioni, V Maheshwari, J G Raimann, F M van der Sande, L A Usvyat, P Kotanko, J P Kooman
BACKGROUND/OBJECTIVES: Hyponatremia is a risk factor for mortality in hemodialysis (HD) patients. It is not well known to which extent the comorbidities, malnutrition, fluid status imbalance and inflammation are related to hyponatremia and affect outcomes. SUBJECTS/METHODS: We studied 8883 patients from the European subset of the international MONitoring Dialysis Outcomes initiative. Nutritional and fluid statuses were assessed by bioimpedance spectroscopy. Fluid depletion was defined as overhydration⩽-1...
July 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27001248/improved-dialytic-removal-of-protein-bound-uraemic-toxins-with-use-of-albumin-binding-competitors-an-in-vitro-human-whole-blood-study
#20
Xia Tao, Stephan Thijssen, Peter Kotanko, Chih-Hu Ho, Michael Henrie, Eric Stroup, Garry Handelman
Protein-bound uraemic toxins (PBUTs) cause various deleterious effects in end-stage kidney disease patients, because their removal by conventional haemodialysis (HD) is severely limited by their low free fraction in plasma. Here we provide an experimental validation of the concept that the HD dialytic removal of PBUTs can be significantly increased by extracorporeal infusion of PBUT binding competitors. The binding properties of indoxyl sulfate (IS), indole-3-acetic acid (IAA) and hippuric acid (HIPA) and their binding competitors, ibuprofen (IBU), furosemide (FUR) and tryptophan (TRP) were studied in uraemic plasma...
March 22, 2016: Scientific Reports
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