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  Water Deficit in Hypernatremia

 
Input
 
Age Sex Factor Male <65 years old (0.6)

Male ≥65 years old (0.5)

Female <18 years old (0.6)

Female 18 to <65 years old (0.5)

Female ≥65 years old (0.45)
Desired Na  
Normal Weight  
Serum Na  

 
Result
 
Important: Inputs must be complete to perform calculation.

 
 
WDef  
 
Decimal Precision  
 

 
  Data action

 
     
 
Include literature references: Yes   No
 

 
Notes
  • The default unit of measure for weight is kilograms. Please verify that the correct unit of measure has been selected.
  • The term Age Sex Factor * Normal Weight represents the normal total body water (TBW).
  • Normal TBW is gender and age specific as seen in the 0.6, 0.5 and 0.45 factors above.

 
Equations used
 
WDef = (AgeSexFactor * NormalWeight) * (SerumNa - DesiredNa) / DesiredNa

 

 
Calculation Details and Variables
  • Equation parameters such as Age Sex Factor, have two or more discrete values that may be used in the calculation. The numbers in the parentheses, e.g. (0.6), represent the values that will be used.

 
References
  1. Adrogue HJ, Madias NE. Hypernatremia. N Engl J Med. 2000 May 18;342(20):1493-9. PubMed ID: 10816188 PubMed Logo

 
Associated Medical Subject Headings [MeSH]
 
         Female,   Humans,   Hypernatremia,   Insensible,   Male,   Water Loss,   Water-Electrolyte Imbalance

 
Associated Logical Observation Identifiers Names and Codes [LOINC]
 
Parameter LOINC's and Suggested Units
Serum Na 2951-2 : mmol/L      2947-0 : mEq/L      32340-2 : mEq/L      39791-9 : mEq/L      

 
This material contains content from LOINC (http://loinc.org). LOINC is copyright © 1995-2023, Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee and is available at no cost under the license at http://loinc.org/license. LOINC® is a registered United States trademark of Regenstrief Institute, Inc.

 
Associated ICD10-CM Codes
 
   E87.0Hyperosmolality and hypernatremia
   E86.0Dehydration
   E87.8Other disorders of electrolyte and fluid balance, not elsewhere classified

 
Associated ICD9-CM Codes
 
   276.0Hypernatremia
   276.51Dehydration
   276.9Electrolyt/fluid dis nec
   276.5Hypovolemia

 

 
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