Sodium (mmol/L) | |
Weight | |
unit | kg lb |
Body Water Deficit (in liters)=
0.6 * Wt * [(Na/140) - 1]
Wt=current weight in kg
Na=measured serum Na in mEq/L
Assumes Total Body Water is 60% of current body weight; may be less in female or cachectic patients
Expanded formula: Deficit= Desired TBW - Current TBW=
[(Na*0.6*Wt)/Normal serum Na] - (0.6*Wt)