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HelpTest Code LAB8500 Osmolality, Urine, 24 Hour
Useful For
- Evaluating the concentrating ability of kidneys
- Assessing renal disease, inappropriate secretion of antidiuretic hormone, and diabetes insipidus
Methodology
Freezing Point Depression
Performing Laboratory
Bozeman Health Laboratory Services
Specimen Requirements
Specimen Type: Urine
Container/Tube: 24-hour urine collection container
Specimen Volume:
Preferred: 10 mL
Acceptable: Entire collection
Specimen Minimum Volume: 1 mL
Collection Instructions:
- Collect a 24-hour urine specimen.
- Starting and ending times of collection are required.
- No preservative. Refrigerate specimen during collection.
- Mix well before taking aliquot.
- Centrifuge specimen before analysis.
- Follow special collection instructions below.
Special Instructions
Specimen Transport Temperature
Refrigerated
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Ambient | 4 hours |
| Refrigerated | 5 days | |
| Frozen | 6 months |
Reference Values
- 0-11 months of age: 50-750 mOsm/Kg
- > or equal to 12 months: 150-1150 mOsm/Kg
Day(s) Test Set Up
Monday through Sunday
CPT Coding
83935