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HelpTest ID OSMOF Osmolality, Feces
Ordering Guidance
This test is only clinically valid if performed on watery specimens. In the event a formed fecal specimen is submitted, the test will not be performed.
Specimen Required
Patient Preparation: No barium, laxatives, or enemas may be used for 96 hours prior to start of, or during, collection.
Supplies: Stool containers - 24, 48, 72 Hour Kit (T291)
Container/Tube: Stool container
Specimen Volume: 10 g
Collection Instructions: Collect a very liquid stool specimen.
Secondary ID
606758Useful For
Measurement of osmolality for the workup of cases of chronic diarrhea
Diagnosis of factitious diarrhea (where patient adds fluid to stool to simulate diarrhea)
Specimen Type
FecalSpecimen Stability Information
| Specimen Type | Temperature | Time |
|---|---|---|
| Fecal | Frozen (preferred) | 14 days |
| Refrigerated | 7 days | |
| Ambient | 48 hours |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
An interpretive report will be provided
Performing Laboratory
Mayo Clinic Laboratories in Rochester
CPT Code Information
84999
Day(s) Performed
Monday, Thursday