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      Management of the Hemodialysis Patient: A European Perspective

      Blood Purification

      S. Karger AG

      Dialysis outcome, Geographical differences

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          Abstract

          This article explores some of the factors which may contribute to the persistence of the differences in outcome between European and US hemodialysis patients. A higher comorbidity of incident and prevalent renal replacement therapy patients, different vascular access policies with less use of arteriovenous fistulas, shorter dialysis times, and higher reutilization of dialysis membranes in the USA may, among other factors, explain the higher mortality compared to Europe and Japan. No major differences in patient referral to the nephrologist, in residual renal function at the start of dialysis, nor in the dialysis dose based on Kt/V urea data were noted.

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          Most cited references 9

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          Factors predicting malnutrition in hemodialysis patients: a cross-sectional study.

          Signs of protein-energy malnutrition are common in maintenance hemodialysis (HD) patients and are associated with increased morbidity and mortality. To evaluate the nutritional status and relationship between various parameters used for assessing malnutrition, we performed a cross-sectional study in 128 unselected patients treated with hemodialysis (HD) thrice weekly for at least two weeks. Global nutritional status was evaluated by the subjective global nutritional assessment (SGNA). Body weight, skinfold thicknesses converted into % body fat mass (BFM), mid-arm muscle circumference, hand-grip strength and several laboratory values, including serum albumin (SA1b), plasma insulin-like growth factor I (p-IGF-I), serum C-reactive protein (SCRP) and plasma free amino acids, were recorded. Dose of dialysis and protein equivalence of nitrogen appearance (nPNA) were evaluated by urea kinetic modeling. The patients were subdivided into three groups based on SGNA: group I, normal nutritional status (36%); group II, mild malnutrition (51%); and group III, moderate or (in 2 cases) severe malnutrition (13%). Clinical factors associated with malnutrition were: high age, presence of cardiovascular disease and diabetes mellitus. nPNA and Kt/V(urea) were similar in the three groups. However, when normalized to desirable body wt, both were lower in groups II and III than in group I. Anthropometric factors associated with malnutrition were low body wt, skinfold thickness, mid-arm muscle circumference (MAMC), and handgrip strength. Biochemical factors associated with malnutrition were low serum levels of albumin and creatinine and low plasma levels of insulin-like growth factor 1 (IGF-1) and branched-chain amino acids (isoleucine, leucine and valine). The serum albumin (SAlb) level was not only a predictor of nutritional status, but was independently influenced by age, sex and SCRP. Plasma IGF-1 levels also reflected the presence and severity of malnutrition and appeared to be more closely associated than SAlb with anthropometric and biochemical indices of somatic protein mass. Elevated SCRP (> 20 mg/liter), which mainly reflected the presence of infection/inflammation and was associated with hypoalbuminemia, was more common in malnourished patients than in patients with normal nutritional status, and also more common in elderly than in younger patients. Plasma amino acid levels, with the possible exception of the branched-chain amino acids (isoleucine, leucine, valine), seem to be poor predictors of nutritional status in hemodialysis patients.
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            Association of morbidity with markers of nutrition and inflammation in chronic hemodialysis patients: a prospective study.

            Numerous studies suggest a strong association between nutrition and clinical outcome in chronic hemodialysis (CHD) patients. Nevertheless, the pathophysiological link between malnutrition and morbidity remains to be clarified. In addition, recent evidence suggests that nutritional indices may reflect an inflammatory response, as well as protein-calorie malnutrition. In this study, we prospectively assessed the relative importance of markers of nutritional status and inflammatory response as determinants of hospitalization in CHD patients. The study consisted of serial measurements of concentrations of serum albumin, creatinine, transferrin, prealbumin, C-reactive protein (CRP), and reactance values by bio-electrical impedance analysis (BIA) as an indirect measure of lean body mass every 3 months over a period of 15 months in 73 CHD patients. Outcome was determined by hospitalizations over the subsequent three months following each collection of data. Patients who required hospitalization in the three months following each of the measurement sets had significantly different values for all parameters than patients who were not hospitalized. Thus, serum albumin (3.93 +/- 0.39 vs. 3.74 +/- 0.39 g/dl), serum creatinine (11.0 +/- 3.7 vs. 9.1 +/- 3.5 mg/dl), serum transferrin (181 +/- 35 vs. 170 +/- 34 mg/dl), serum prealbumin (33.6 +/- 9.2 vs. 30.0 +/- 10.1 mg/dl), and reactance (50.4 +/- 15.6 vs. 43.0 +/- 13.0 ohms) were higher for patients not hospitalized, whereas CRP (0.78 +/- 0.89 vs. 2.25 +/- 2.72 mg/dl) was lower in patients who were not hospitalized. All differences were statistically significant (P < 0.05 for all parameters). When multivariate analysis was performed, serum CRP and reactance values were the only statistically significant predictors of hospitalization (P < 0.05 for both). When a serum CRP concentration of 0.12 mg/dl was considered as a reference range (relative risk 1.0), the relative risk for hospitalization was 7% higher (relative risk = 1.07) for a CRP concentration of 0.92 mg/dl and was 30% (relative risk = 1.30) higher for a CRP concentration of 3.4 mg/dl. When a reactance value of 70 ohms was considered as a reference range with a relative risk of 1.0, the relative risk of hospitalization increased to 1.09 for a reactance value of 43 ohms and further increased to 1.14 for a reactance value of 31 ohms. The results of this study strongly indicate that both nutritional status and inflammatory response are independent predictors of hospitalization in CHD patients. CRP and reactance values by BIA are reliable indicators of hospitalization. Visceral proteins such as serum albumin, prealbumin, and transferrin are influenced by inflammation when predicting hospitalization. When short-term clinical outcomes such as hospitalizations are considered, markers of both inflammation and nutrition should be evaluated.
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              When to initiate dialysis: effect of proposed US guidelines on survival.

              Recent guidelines from the US National Kidney Foundation Dialysis Outcomes Quality Initiative recommend an earlier start of dialysis treatment than has been common practice. Their implementation would have a substantial effect on patients' daily lives and would increase costs. The guidelines are largely opinion-based, because evidence is still lacking. As part of a prospective multicentre study in the Netherlands, we included, between January, 1997, and May, 1999, all new patients with end-stage renal disease, for whom data were available on residual renal function 0-4 weeks before the start of dialysis. We recorded date of death or censoring until August, 2000. 94 (37%) of 253 patients started dialysis treatment later than recommended by the US guideline. There was an increased mortality risk for these patients compared with those who started dialysis on time, although it was not significant (adjusted hazard ratio 1.66 [95% CI 0.95-2.89]). The adjusted difference in estimated survival time after 3 years on dialysis treatment was 2.5 months (1.1-4.0) in favour of timely starters. Conversely, the average delay in dialysis initiation for late starters, the extra time free of dialysis, was at least 4.1 months. Although we observed a gain in survival time with a timely start of dialysis, it is probably a reflection of initiating dialysis earlier in the disease. We question the benefit of putting this guideline into daily practice, given the current clinical evidence and the effects it would have on patients and dialysis resources.
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                Author and article information

                Journal
                BPU
                Blood Purif
                10.1159/issn.0253-5068
                Blood Purification
                S. Karger AG
                978-3-8055-7372-6
                978-3-318-00813-5
                0253-5068
                1421-9735
                2002
                2002
                17 January 2002
                : 20
                : 1
                : 93-102
                Affiliations
                Renal Division, University Hospital, Ghent, Belgium
                Article
                46991 Blood Purif 2002;20:93–102
                10.1159/000046991
                11803165
                © 2002 S. Karger AG, Basel

                Copyright: All rights reserved. No part of this publication may be translated into other languages, reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying, recording, microcopying, or by any information storage and retrieval system, without permission in writing from the publisher. Drug Dosage: The authors and the publisher have exerted every effort to ensure that drug selection and dosage set forth in this text are in accord with current recommendations and practice at the time of publication. However, in view of ongoing research, changes in government regulations, and the constant flow of information relating to drug therapy and drug reactions, the reader is urged to check the package insert for each drug for any changes in indications and dosage and for added warnings and precautions. This is particularly important when the recommended agent is a new and/or infrequently employed drug. Disclaimer: The statements, opinions and data contained in this publication are solely those of the individual authors and contributors and not of the publishers and the editor(s). The appearance of advertisements or/and product references in the publication is not a warranty, endorsement, or approval of the products or services advertised or of their effectiveness, quality or safety. The publisher and the editor(s) disclaim responsibility for any injury to persons or property resulting from any ideas, methods, instructions or products referred to in the content or advertisements.

                Page count
                References: 93, Pages: 10
                Product
                Self URI (application/pdf): https://www.karger.com/Article/Pdf/46991
                Categories
                Paper

                Cardiovascular Medicine, Nephrology

                Geographical differences, Dialysis outcome

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