Free_water_deficit_hypernatremia v.1
Free Water Deficit in Hypernatremia calculates free water deficit by estimated total body water.
To calculate free water deficit by estimated total body water.
Free water deficit = % total body water, fraction × weight, kg × (current Na / ideal Na – 1) where % total body water (TBW) is: Adult male: 60% (i.e., use 0.6 in the equation) Adult female: 50% (0.5) Elderly male: 50% (0.5) Elderly female: 45% (0.45) Child: 60% (0.6)
1. Adrogue HJ and Madias NE. Primary Care: Hypernatremia. New England Journal of Medicine 2000; 342(20):1493-1499. 2. Adrogue HJ and Madias NE. Primary Care: Hyponatremia. New England Journal of Medicine 2000; 342(21):1581-1589.
OBSERVATION.basic_demographic.v1, OBSERVATION.body_weight.v2, OBSERVATION.lab_test-serum_sodium.v1, OBSERVATION.free_water_deficit_hypernatremia.v0
