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      What Is Needed to Achieve a Hemoglobin of 11.0–13.0 g/dl in End-Stage Renal Disease

      review-article
      Blood Purification
      S. Karger AG
      End-stage renal disease, Hemoglobin, Anemia

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          Abstract

          Effective treatment of anemia in end-stage renal disease (ESRD) results in reduced fatigue and improved quality of life. The National Kidney Foundation’s 2006 anemia treatment guidelines recommend maintaining hemoglobin (Hb) at >11 g/dl, while noting that there is insufficient evidence to routinely maintain Hb levels ≧13.0 g/dl. Success in achieving Hb levels within these targets requires careful monitoring and adjustments to treatment. In addition, causes for diminished response and refractory anemia must be adequately evaluated. In this article, factors important for achieving Hb 11–13 g/dl in patients with ESRD are reviewed.

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          Most cited references17

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          Double-blind comparison of full and partial anemia correction in incident hemodialysis patients without symptomatic heart disease.

          It is unclear whether physiologic hemoglobin targets lead to cardiac benefit in incident hemodialysis patients without symptomatic heart disease and left ventricular dilation. In this randomized, double-blind study, lower (9.5 to 11.5 g/dl) and higher (13.5 to 14.5 g/dl) hemoglobin targets were generated with epoetin alpha over 24 wk and maintained for an additional 72 wk. Major eligibility criteria included recent hemodialysis initiation and absence of symptomatic cardiac disease and left ventricular dilation. The primary outcome measure was left ventricular volume index (LVVI). The study enrolled 596 patients. Mean age, duration of dialysis therapy, baseline predialysis hemoglobin, and LVVI were 50.8 yr, 0.8 yr, 11.0 g/dl, and 69 ml/m2, respectively; 18% had diabetic nephropathy. Mean hemoglobin levels in the higher and lower target groups were 13.3 and 10.9 g/dl, respectively, at 24 wk. Percentage changes in LVVI between baseline and last value were similar (7.6% in the higher and 8.3% in the lower target group) as were the changes in left ventricular mass index (16.8 versus 14.2%). For the secondary outcomes, the only between-group difference was an improved SF-36 Vitality score in the higher versus the lower target group (1.21 versus -2.31; P = 0.036). Overall adverse event rates were similar in both target groups; higher (P < 0.05) rates of skeletal pain, surgery, and dizziness were seen in the lower target group, and headache and cerebrovascular events were seen in the higher target group. Normalization of hemoglobin in incident hemodialysis patients does not have a beneficial effect on cardiac structure, compared with partial correction.
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            Effect of malnutrition-inflammation complex syndrome on EPO hyporesponsiveness in maintenance hemodialysis patients.

            Elements of malnutrition-inflammation complex syndrome (MICS) may blunt the responsiveness of anemia of end-stage renal disease (ESRD) to recombinant human erythropoietin (EPO). The authors examined cross-sectional associations between the required dose of EPO within a 13-week interval as prescribed by practicing nephrologists who were blind to the study and several laboratory values known to be related to nutrition and/or inflammation, as well as the malnutrition-inflammation score (MIS), which is a fully quantitative assessment tool based on the subjective global assessment of nutrition. A total of 339 maintenance hemodialysis (MHD) outpatients, including 181 men, who were aged 54.7 +/- 14.5 years (mean +/- SD), who had undergone dialysis for 36.3 +/- 33.2 months, were selected randomly from 7 DaVita dialysis units in Los Angeles South/East Bay area. The average weekly dose of administered recombinant human EPO within a 13-week interval was 217 +/- 187 U/kg. Patients were receiving intravenous iron supplementation (iron gluconate or dextran) averaging 39.5 +/- 47.5 mg/wk. The MIS and serum concentrations of high-sensitivity C-reactive protein, interleukin 6 (IL-6), tumor necrosis factor-alpha, and lactate dehydrogenase had positive correlation with required EPO dose and EPO responsiveness index (EPO divided by hemoglobin), whereas serum total iron binding capacity (TIBC), prealbumin and total cholesterol, as well as blood lymphocyte count had statistically significant but negative correlations with indices of refractory anemia. Most correlations remained significant even after multivariate adjustment for case-mix and anemia factors and other relevant covariates. Similar associations were noticed across EPO per body weight tertiles via analysis of variance and after estimating odds ratio for higher versus lower tertile via logistic regression after same case-mix adjustment. The existence of elements of MICS as indicated by a high MIS and increased levels of proinflammatory cytokines such as IL-6 as well as decreased nutritional values such as low serum concentrations of total cholesterol, prealbumin, and TIBC correlates with EPO hyporesponsiveness in MHD patients.
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              A randomized controlled study of iron supplementation in patients treated with erythropoietin.

              In view of current uncertainty regarding the optimum route for iron supplementation in patients receiving recombinant human erythropoietin (EPO), a prospective randomized controlled study was designed to investigate this issue. All iron-replete renal failure patients commencing EPO who had a hemoglobin concentration < 8.5 g/dl and an initial serum ferritin level of 100 to 800 micrograms/liter were randomized into three groups with different iron supplementation: Group 1, i.v. iron dextran 5 ml every 2 weeks; Group 2, oral ferrous sulphate 200 mg tds; Group 3, no iron. All patients were treated with 25 U/kg of EPO thrice weekly subcutaneously. The hemoglobin concentration, reticulocyte count, serum ferritin, transferrin saturation, and EPO dose were monitored every two weeks for the first four months. Thirty-seven patients entered the study (12 i.v., 13 oral, 12 no iron). The three groups were equivalent with regard to age, sex, and other demographic details. Even allowing for dosage adjustments, the hemoglobin response in the group receiving i.v. iron (7.3 +/- 0.8 to 11.9 +/- 1.2 g/dl) was significantly greater than that for the other two groups (7.2 +/- 1.1 to 10.2 +/- 1.4 g/dl and 7.3 +/- 0.8 to 9.9 +/- 1.6 g/dl for Groups 2 and 3, respectively; P < 0.005 for both groups vs. Group 1 at 16 weeks). There was no difference between the groups supplemented with oral iron and no iron. Serum ferritin levels remained constant in those receiving i.v. iron (345 +/- 273 to 359 +/- 140 micrograms/liter), in contrast to the other two groups in which ferritin levels fell significantly (309 +/- 218 to 116 +/- 87 micrograms/liter and 458 +/- 206 to 131 +/- 121 micrograms/liter for Groups 2 and 3, respectively; P < 0.0005 for Group 1 vs. Group 2, and P < 0.005 for Group 1 vs. Group 3 at 16 weeks). Dosage requirements of EPO were less in Group 1 (1202 +/- 229 U/kg/16 weeks) than in Group 2 (1294 +/- 314 U/kg/16 weeks) or Group 3 (1475 +/- 311 U/kg/16 weeks; P < 0.05 vs. Group 1). The results of this study suggest that, even in iron-replete patients, those supplemented with i.v. iron have an enhanced hemoglobin response to EPO with better maintenance of iron stores and lower dosage requirements of EPO, compared with those patients receiving oral iron and no iron supplementation.
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                Author and article information

                Journal
                BPU
                Blood Purif
                10.1159/issn.0253-5068
                Blood Purification
                S. Karger AG
                978-3-8055-8237-7
                978-3-318-01434-1
                0253-5068
                1421-9735
                2007
                December 2006
                14 December 2006
                : 25
                : 1
                : 53-57
                Affiliations
                Winthrop-University Hospital, Mineola, N.Y., USA
                Article
                96398 Blood Purif 2007;25:53–57
                10.1159/000096398
                17170538
                1d6b00d3-92a5-4876-8bb8-6146a7ef8fc8
                © 2007 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.

                History
                Page count
                References: 26, Pages: 5
                Categories
                Paper

                Cardiovascular Medicine,Nephrology
                Hemoglobin,End-stage renal disease,Anemia
                Cardiovascular Medicine, Nephrology
                Hemoglobin, End-stage renal disease, Anemia

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