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HelpTest Code UOSMU Osmolality, Random, Urine
Specimen Required
Supplies: Urine Tubes, 10 mL (T068)
Container/Tube: Plastic, 10-mL urine tube
Specimen Volume: 5 mL
Collection Instructions: Collect a random urine specimen
Useful For
Assessing the concentrating and diluting ability of the kidney
Method Name
Freezing Point Depression
Reporting Name
Osmolality, USpecimen Type
UrineSpecimen Minimum Volume
1 mL
Specimen Stability Information
| Specimen Type | Temperature | Time | Special Container |
|---|---|---|---|
| Urine | Refrigerated (preferred) | 7 days | |
| Frozen | 7 days |
Reject Due To
All specimens will be evaluated at Mayo Clinic Laboratories for test suitability.Reference Values
0-11 months: 50-750 mOsm/kg
≥12 months: 150-1,150 mOsm/kg
Performing Laboratory
Mayo Clinic Laboratories in Rochester
Test Classification
This test has been cleared, approved, or is exempt by the US Food and Drug Administration and is used per manufacturer's instructions. Performance characteristics were verified by Mayo Clinic in a manner consistent with CLIA requirements.CPT Code Information
83935
LOINC Code Information
| Test ID | Test Order Name | Order LOINC Value |
|---|---|---|
| UOSMU | Osmolality, U | 2695-5 |
| Result ID | Test Result Name | Result LOINC Value |
|---|---|---|
| UOSMU | Osmolality, U | 2695-5 |
Forms
If not ordering electronically, complete, print, and send a Renal Diagnostics Test Request (T830) with the specimen.
Day(s) Performed
Monday through Sunday