Osmolality, Stool
Test Mnemonic
SOSM
CPT Codes
- 84999 - QTY (1)
LOINC ®
2693-0
Includes
- Osmolality Fecal
Performing Laboratory
ARUP
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 5 mL | Stool | Clean container | Frozen | Place liquid stool specimen on ice. Do not add saline or water to liquefy specimen. Separate specimens must be submitted when multiple tests are ordered. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.5 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Frozen | 1 month |
| Refrigerated | 1 week |
| Ambient | Unacceptable |
Days Performed
Sun - Sat
Turnaround Time
2 - 3 days
Methodology
| Name | Description |
|---|---|
| Freezing Point Depression |
Reference Range
| Osmolality, Stool | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Years | 16 Years | Normal | 271 - 296 | mOsm/kg | 17 Years | 99 Years | Normal | 280 - 303 | mOsm/kg |
Special Info
Formed stool specimens will be rejected. This test is New York state approved.
Clinical Info
Evaluation of electrolyte balance