Osmolality, Feces
Use
Measurement of osmolality is useful in the workup of chronic diarrhea and in diagnosing factitious diarrhea, where patients may add fluid to stool to simulate diarrhea. ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/overview/606758?utm_source=openai))
Special Instructions
This test is only clinically valid if performed on watery stool specimens; formed stool specimens will not be performed. Patient preparation: no barium, laxatives, or enemas may be used for 96 hours prior to and during collection. ([mayocliniclabs.com](https://www.mayocliniclabs.com/test-catalog/overview/606758?utm_source=openai))
Limitations
Not provided.
New York Approved
Methodology
Other
Biomarkers
Result Turnaround Time
Not provided.
Related Documents
For more information, please review the documents below
Specimen
Other
Volume
10 g
Minimum Volume
5 g
Container
Stool container
Collection Instructions
Collect a very liquid stool specimen.
Patient Preparation
No barium, laxatives, or enemas may be used for 96 hours prior to start of, or during, collection.
Causes for Rejection
Formed specimens are not accepted/not performed
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | Ambient: 48 hours |
| Refrigerated | Refrigerated: 7 days |
| Frozen | Frozen (preferred): 14 days |