• Journal of critical care · Aug 2021

    Multicenter Study Observational Study

    Fluid management in patients with acute kidney injury - A post-hoc analysis of the FINNAKI study.

    • Nina Inkinen, Sakari Jukarainen, Renske Wiersema, Meri Poukkanen, Ville Pettilä, and Suvi T Vaara.
    • Department of Anesthesia and Intensive Care, Central Finland Central Hospital, Central Finland Health Care District, Keskussairaalantie 19 M rak 2krs, Jyväskylä 40620, Finland; Division of Intensive Care Medicine, Department of Anesthesiology, Intensive Care and Pain Medicine, University of Helsinki and Helsinki University Hospital, Helsinki, Finland. Electronic address: nina.inkinen@ksshp.fi.
    • J Crit Care. 2021 Aug 1; 64: 205-210.

    PurposeWhether positive fluid balance among patients with acute kidney injury (AKI) stems from decreased urine output, overzealous fluid administration, or both is poorly characterized.Materials And MethodsThis was a post hoc analysis of the prospective multicenter observational Finnish Acute Kidney Injury study including 824 AKI and 1162 non-AKI critically ill patients.ResultsWe matched 616 AKI (diagnosed during the three first intensive care unit (ICU) days) and non-AKI patients using propensity score. During the three first ICU days, AKI patients received median [IQR] of 11.4 L [8.0-15.2]L fluids and non-AKI patients 10.2 L [7.5-13.7]L, p < 0.001 while the fluid output among AKI patients was 4.7 L [3.0-7.2]L and among non-AKI patients 5.8 L [4.1-8.0]L, p < 0.001. In AKI patients, the median [IQR] cumulative fluid balance was 2.5 L [-0.2-6.0]L compared to 0.9 L [-1.4-3.6]L among non-AKI patients, p < 0.001. Among the 824 AKI patients, smaller volumes of fluid input with a multivariable OR of 0.90 (0.88-0.93) and better fluid output (multivariable OR 1.12 (1.07-1.18)) associated with enhanced change of resolution of AKI.ConclusionsAKI patients received more fluids albeit having lower fluid output compared to matched critically ill non-AKI patients. Smaller volumes of fluid input and higher fluid output were associated with better AKI recovery.Copyright © 2021 The Authors. Published by Elsevier Inc. All rights reserved.

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