New Insights on Intravenous Fluids, Diuretics and Acute Kidney Injury

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Abstract

Acute kidney injury (AKI) is commonly and increasingly encountered in patients with critical illness. Fluid therapy is the cornerstone for the prevention and management of critically ill patients with AKI. New data have emerged that have raised concern that specific types of fluid (i.e. hydroxyethylstarch) may either contribute to or exacerbate AKI. Additional data have accumulated to indicate that the unnecessary accumulation of fluid and volume overload can negatively impact clinical outcomes. This finding may be further compounded in patients with oliguric AKI where solute and free water elimination are impaired. Diuretic therapy in AKI remains controversial. However, diuretic use is common, despite a paucity of evidence to show improved clinical outcomes. There are few therapeutic interventions proven to impact the clinical course and outcome of critically ill patients with established AKI. Current management strategies center largely on supportive care, with rapid resuscitation, removal of the stimulus contributing to AKI, judicious avoidance of complications, and allowing time for recovery. In this review, we explore recent insights on intravenous fluid therapy, volume overload, and diuretic therapy in the context of the critically ill patients with AKI.

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Most cited references 65

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Effects of intravenous fluid restriction on postoperative complications: comparison of two perioperative fluid regimens: a randomized assessor-blinded multicenter trial.

Birgitte Brandstrup, Hanne Hjorth Tønnesen, Randi Beier-Holgersen … (2003)

To investigate the effect of a restricted intravenous fluid regimen versus a standard regimen on complications after colorectal resection. Current fluid administration in major surgery causes a weight increase of 3-6 kg. Complications after colorectal surgery are reported in up to 68% of patients. Associations between postoperative weight gain and poor survival as well as fluid overload and complications have been shown. We did a randomized observer-blinded multicenter trial. After informed consent was obtained, 172 patients were allocated to either a restricted or a standard intraoperative and postoperative intravenous fluid regimen. The restricted regimen aimed at maintaining preoperative body weight; the standard regimen resembled everyday practice. The primary outcome measures were complications; the secondary measures were death and adverse effects. The restricted intravenous fluid regimen significantly reduced postoperative complications both by intention-to-treat (33% versus 51%, P = 0.013) and per-protocol (30% versus 56%, P = 0.003) analyses. The numbers of both cardiopulmonary (7% versus 24%, P = 0.007) and tissue-healing complications (16% versus 31%, P = 0.04) were significantly reduced. No patients died in the restricted group compared with 4 deaths in the standard group (0% versus 4.7%, P = 0.12). No harmful adverse effects were observed. The restricted perioperative intravenous fluid regimen aiming at unchanged body weight reduces complications after elective colorectal resection.

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Effects of different doses in continuous veno-venous haemofiltration on outcomes of acute renal failure: a prospective randomised trial.

C. Ronco, R Bellomo, P Homel … (2000)

Continuous veno-venous haemofiltration is increasingly used to treat acute renal failure in critically ill patients, but a clear definition of an adequate treatment dose has not been established. We undertook a prospective randomised study of the impact different ultrafiltration doses in continuous renal replacement therapy on survival. We enrolled 425 patients, with a mean age of 61 years, in intensive care who had acute renal failure. Patients were randomly assigned ultrafiltration at 20 mL h(-1) kg(-1) (group 1, n=146), 35 mL h(-1) kg(-1) (group 2, n=139), or 45 mL h(-1) kg(-1) (group 3, n=140). The primary endpoint was survival at 15 days after stopping haemofiltration. We also assessed recovery of renal function and frequency of complications during treatment. Analysis was by intention to treat. Survival in group 1 was significantly lower than in groups 2 (p=0.0007) and 3 (p=0.0013). Survival in groups 2 and 3 did not differ significantly (p=0.87). Adjustment for possible confounding factors did not change the pattern of differences among the groups. Survivors in all groups had lower concentrations of blood urea nitrogen before continuous haemofiltration was started than non-survivors. 95%, 92%, and 90% of survivors in groups 1, 2, and 3, respectively, had full recovery of renal function. The frequency of complications was similarly low in all groups. Mortality among these critically ill patients was high, but increase in the rate of ultrafiltration improved survival significantly. We recommend that ultrafiltration should be prescribed according to patient's bodyweight and should reach at least 35 mL h(-1) kg(-1).

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Incidence and mortality of acute renal failure in Medicare beneficiaries, 1992 to 2001.

Jay L Xue, Frank Daniels, Robert Star … (2006)

This study's objective was to determine the incidence and mortality of acute renal failure (ARF) in Medicare beneficiaries. Data were from hospitalized Medicare beneficiaries (5,403,015 discharges) between 1992 and 2001 from the 5% sample of Medicare claims. For 1992 to 2001, the overall incidence rate of ARF was 23.8 cases per 1000 discharges, with rates increasing by approximately 11% per year. Older age, male gender, and black race were strongly associated (P < 0.0001) with ARF. The overall in-hospital death rate was 4.6% in discharges without ARF, 15.2% in discharges with ARF coded as the principal diagnosis, and 32.6% in discharges with ARF as a secondary diagnosis. In-hospital death rates were 32.9% in discharges with ARF that required renal dialysis and 27.5% in those with ARF that did not require dialysis. Death within 90 d after hospital admission was 13.1% in discharges without ARF, 34.5% in discharges with ARF coded as the principal diagnosis, and 48.6% in discharges with ARF as a secondary diagnosis. Discharges with ARF were more (P < 0.0001) likely to have intensive care and other acute organ dysfunction than those without ARF. For discharges both with and without ARF, rates for death within 90 d after hospital admission showed a declining trend. In conclusion, the incidence rate of ARF in Medicare beneficiaries has been increasing. Those of older age, male gender, and black race are more likely to have ARF. These data show ARF to be a major contributor to morbidity and mortality in hospitalized patients.

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Author and article information

Journal

Journal ID (publisher-id): NEC

Journal ID (nlm-ta): Nephron Clin Pract

Journal ID (doi): 10.1159/issn.1660-2110

Title: Nephron Clinical Practice

Publisher: S. Karger AG

ISBN: 978-3-8055-8646-7

ISBN: 978-3-8055-8647-4

ISSN (Electronic): 1660-2110

Publication date Subscription-year: 2008

Publication date (Print): September 2008

Publication date (Electronic): 18 September 2008

Volume: 109

Issue: 4

Pages: c206-c216

Affiliations

^aDivision of Critical Care Medicine, Faculty of Medicine and Dentistry, and ^bDepartment of Anesthesiology and Pain Medicine, University of Alberta Hospital, University of Alberta, Edmonton, Alta., Canada

Article

Publisher ID: 142930 Other ID: Nephron Clin Pract 2008;109:c206

DOI: 10.1159/000142930

PubMed ID: 18802369

SO-VID: 34c1682c-c74e-41d2-a6b6-8c9e9ddef604

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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.

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New Insights on Intravenous Fluids, Diuretics and Acute Kidney Injury

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Karger: Nephrology

Most cited references 65

Effects of intravenous fluid restriction on postoperative complications: comparison of two perioperative fluid regimens: a randomized assessor-blinded multicenter trial.

Effects of different doses in continuous veno-venous haemofiltration on outcomes of acute renal failure: a prospective randomised trial.

Incidence and mortality of acute renal failure in Medicare beneficiaries, 1992 to 2001.

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