Home


ELOSF/EFPO-M
ELECTROLYTE AND OSMOLALITY FECES

Test Code ELOSF/EFPO-M 
Test ELECTROLYTE AND OSMOLALITY FECES 
Methodology Osmolality Gap: Calculation
Sodium, F ; Potassium, F; Chloride, F: Indirect Ion-Selective Electrode (ISE) Potentiometry
Osmolality, F: Freezing Point Depression
Phosphorus, F: Photometric, Ammonium Molybdate
Magnesium, F: Colorimetric Titration 
Description Useful for workup cases of chronic diarrhea 
Specimen Collection Container/Tube: Stool container (Supply T291)
Specimen Volume: 10 g
Collection Instructions: Collect a very liquid stool specimen.

Additional Information:
1. Do not send formed stool. In the event a formed stool is submitted, the test will not be performed. The report will indicate "A formed stool specimen was submitted for analysis. This test was not performed because it only has clinical value if performed on a watery stool specimen."
2. Osmolality results will be reported as mOsm/kg regardless of collection duration.
3. Sodium, chloride, and potassium will be reported as mmol/L
4. Magnesium and phosphorus will be reported as mg/dL 

Reference Values No established reference values 
Analytic Time 3 Days 
Day(s) Test Set Up Monday, Wednesday, Friday; Evening 
CPT Code(s) 82438  
83735  
84100  
84302  
84999