How is the severity of hyponatremia categorized?

Updated: Jun 17, 2019
  • Author: Eric E Simon, MD; Chief Editor: Vecihi Batuman, MD, FASN  more...
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Joint European guidelines classify hyponatremia in adults according to serum sodium concentration, as follows [2] :

  • Mild: 130-134 mmol/L
  • Moderate: 125-129 mmol/L
  • Profound: < 125 mmol/L

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