• Gregor Lindner and Georg-Christian Funk.
• Department of Emergency Medicine, Inselspital, University of Bern, 3010 Bern, Switzerland. lindner.gregor@gmail.com
• J Crit Care. 2013 Apr 1;28(2):216.e11-20.

AbstractHypernatremia is common in intensive care units. It has detrimental effects on various physiologic functions and was shown to be an independent risk factor for increased mortality in critically ill patients. Mechanisms of hypernatremia include sodium gain and/or loss of free water and can be discriminated by clinical assessment and urine electrolyte analysis. Because many critically ill patients have impaired levels of consciousness, their water balance can no longer be regulated by thirst and water uptake but is managed by the physician. Therefore, the intensivists should be very careful to provide the adequate sodium and water balance for them. Hypernatremia is treated by the administration of free water and/or diuretics, which promote renal excretion of sodium. The rate of correction is critical and must be adjusted to the rapidity of the development of hypernatremia.Copyright © 2013 Elsevier Inc. All rights reserved.

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