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Journal of critical care · Dec 2014
Admission high serum sodium is not associated with increased intensive care unit mortality risk in respiratory patients.
- Shailesh Bihari, Sandra L Peake, Michael Bailey, David Pilcher, Shivesh Prakash, and Andrew Bersten.
- Department of Critical Care Medicine, Flinders University, Bedford Park, South Australia, Australia; Department of Intensive Care Medicine, Flinders Medical Centre, Bedford Park, South Australia, Australia. Electronic address: biharishailesh@gmail.com.
- J Crit Care. 2014 Dec 1;29(6):948-54.
BackgroundBecause increased serum osmolarity may be lung protective, we hypothesized that increased mortality associated with increased serum sodium would be ameliorated in critically ill patients with an acute respiratory diagnosis.MethodsData collected within the first 24 hours of intensive care unit (ICU) admission were accessed using ANZICS CORE database. From January 2000 to December 2010, 436,209 patients were assessed. Predefined subgroups including patients with acute respiratory diagnoses were examined. The effect of serum sodium on ICU mortality was assessed with analysis adjusted for illness severity and year of admission. Results are presented as odds ratio (95% confidence interval) referenced against a serum sodium range of 135 to 144.9 mmol/L.ResultsOverall ICU mortality was increased at each extreme of dysnatremia (U-shaped relationship). A similar trend was found in various subgroups, with the exception of patients with respiratory diagnoses where ICU mortality was not influenced by high serum sodium (odds ratio, 1.3 [0.7-1.2]) and was different from other patient groups (P<.01). Any adverse associations with hypernatremia in respiratory patients were confined to those with arterial pressure of oxygen (PaO2)/fraction of inspired oxygen (Fio2) ratios of greater than 200.ConclusionHigh admission serum sodium is associated with increased odds for ICU death, except in respiratory patients.Copyright © 2014 Elsevier Inc. All rights reserved.
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