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      Effect of a Simultaneous Potassium and Carbohydrate Load on Extrarenal K Homeostasis in End-Stage Renal Failure

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          Abstract

          Patients with chronic renal failure (CRF) are continuously exposed to hyperkalemia. In these patients the extrarenal disposal of a potassium load may be very important to determine the plasma potassium levels. We studied the effect of a combined oral load of potassium (0.5 mEq/kg body weight) and carbohydrate (0.5 g/kg body weight) to mimic normal ingestion of potassium. Eight CRF patients and 5 control subjects were studied. The maximal increase in plasma potassium levels achieved was significantly higher in the patients (1.07 ± 0.1 mEq/l) than in controls (0.39 ± 0.05 mEq/l). Basal insulin levels were higher in the CRF patients and increased with the oral potassium and carbohydrate load in both controls and patients. In the CRF patients only 58.9 ± 3% of the potassium load was translocated to the intracellular space compared to 81 ± 6% in the controls. No correlation was found between the acid base status and maximal potassium increase. We conclude that patients with CRF exhibit an impaired extrarenal handling of potassium and that this abnormality does not appear to be related to insulin secretion or acid base status.

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          Author and article information

          Journal
          NEF
          Nephron
          10.1159/issn.1660-8151
          Nephron
          S. Karger AG
          1660-8151
          2235-3186
          1989
          1989
          10 December 2008
          : 53
          : 2
          : 133-137
          Affiliations
          Departments of Medicine and Physiology and Biophysics, Faculty of Medicine, University of Chile, Casilla, Santiago, Chile
          Article
          185725 Nephron 1989;53:133–137
          10.1159/000185725
          2682302
          9667b20f-7c87-49bd-bf43-68a8a9c13a57
          © 1989 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
          : 10 February 1989
          Page count
          Pages: 5
          Categories
          Original Paper

          Cardiovascular Medicine,Nephrology
          Extrarenal potassium homeostasis,Potassium,Carbohydrate,End-stage renal failure

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