Sodium Deficit in Hyponatremia

 

Input
 

Sex	Female (0.5)
	Male (0.6)
Normal Wgt		gm kg lb mg
Serum Na		mEq/L mmol/L
Desired Na		mEq/L mmol/L

 

Result
 

Na Deficit		mEq_Na
Decimal Precision   0 1 2 3

 

Notes

• The term Sex * Normal Wgt represents the normal total body water (TBW).
• Normal TBW is gender specific as seen in the 0.6 and 0.5 factors above.

 
Equations used
 

NaDeficit = Sex * NormalWgt * (DesiredNa - SerumNa)

 

Calculation Details and Variables

• Equation parameters such as Sex, have two or more discrete values that may be used in the calculation. The numbers in the parentheses, e.g. (0.5), represent the values that will be used.