Hypernatremia: Sx = neuro changes

***Calculate free water deficit: ((Na – 140)/140) X TBW = L water behind/down from normal.

TBW = Total Body Water

  1. Female: TBW = 0.5 X weight (kg).
  2. Male: TBW = 0.6 X weight (kg).

Tx: Start D5W = free water (or can give ½ NS). Correct free water deficit over 48-72 ho.

Consider if cause may be diabetes insipidus:

  • Central: No production of ADH from brain.
    • Tx: Give Desmopressin (synthetic Vasopressin = ADH).
  • Peripheral: Kidneys are nonresponsive to ADH produced in the body.

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