Classic Formulas:
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Adrogue Formula: | |
Change in serum Na+ = |
(infusate Na+ + infusate K+) - serum Na+ |
total body water + 1 |
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Insensible water losses = 500 - 1500 cc/day.
Fever increases insensible water losses by 10% per degree Celsius above 38°, or 100-150 cc/day increase per degree Celsius above 37°.
Adrogue, HJ; and Madias, NE. Primary Care: Hypernatremia. New England Journal of Medicine 2000; 342(20):1493-1499.
Adrogue, HJ; and Madias, NE. Primary Care: Hyponatremia. New England Journal of Medicine 2000; 342(21):1581-1589.