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Calculator: Stool osmolal gap


Calculator: Stool osmolal gap

 
Input
 
Stool Osm  
Stool Na  
Stool K  

 
Result
 
Important: Inputs must be complete to perform calculation.

 
 
SOG  
 
Decimal precision  

 

 

Stool osmolal gap (SOG) interpretation

 
SOG <50: Compatible with secretory diarrhea
SOG ≥50 and ≤125: Indeterminate
SOG >125: Compatible with osmotic diarrhea

 
 

 
Notes
  • Please see appropriate UpToDate topic reviews for further information.
  • Stool Na: stool sodium; Stool K: stool potassium.

 
Equations used
 
SOG = Stool_Osm - (2 * (Stool_Na + Stool_K))

 

 
Only digits 0 to 9 and a single decimal point (".") are acceptable as numeric inputs. Attempted input of other characters into a numeric field may lead to an incorrect result.

Information on this page may not appear correctly if printed.

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Topic 15652 Version 7.0