• Journal of critical care · Dec 2015

    Review

    Magnesium status and magnesium therapy in critically ill patients: A systematic review.

    • Jessica Fairley, Neil John Glassford, Ling Zhang, and Rinaldo Bellomo.
    • Alfred Hospital, Prahran, VIC 3004, Australia; School of Public Health and Preventive Medicine, Monash University, Prahran, VIC, Australia.
    • J Crit Care. 2015 Dec 1; 30 (6): 1349-58.

    PurposeMagnesium is frequently measured and administered in general intensive care unit patients. However, magnesium status, its association with outcomes, and therapeutic utility in such patients are unclear. We performed a systematic review of the relevant literature to define current knowledge in this field.Materials And MethodsWe searched MEDLINE, CENTRAL, and EMBASE from 1975 to July 2014 for adult English language articles excluding obstetric, non-intensive care unit based, and specific population (poisoning, cardiothoracic, and neurosurgery) studies. We identified articles on magnesium measurement, associations, and therapy. We calculated pooled effect estimates from reported adjusted risk estimates.ResultsWe identified 34 relevant studies. Total serum total magnesium was the most commonly measure of magnesium status. Risk of mortality was significantly increased with hypomagnesemia (odds ratio, 1.85; 95% confidence interval, 1.31-2.60). No consistent associations existed between magnesemia or magnesium administration and any other outcomes.ConclusionsTotal serum magnesium levels are generally used to estimate magnesium status in critical illness. Hypomagnesemia appears associated with greater risk of mortality, but the efficacy of magnesium administration is open to challenge.Copyright © 2015 Elsevier Inc. All rights reserved.

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