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HelpTest Code LAB712 Creatinine, 24 Hour Urine
Useful For
The calculation of the fractional excretion of urine analytes
Methodology
Kinetic Colorimetric (Jaffe)
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:
1. Collect a 24-hour urine specimen.
2. No preservative.
3. Refrigerate specimen during collection.
4. Mix well before taking aliquot.
Additional Information:
- Starting and ending times of collection are required.
- If urine must be collected with a preservative for other analytes, only hydrochloric acid or boric acid may be used.
- Follow special collection instructions below.
Special Instructions
Specimen Transport Temperature
Refrigerated
Specimen Stability
| Specimen Type | Temperature | Time |
|---|---|---|
| Urine | Ambient | 2 days |
| Refrigerated | 6 days | |
| Frozen | 6 months |
Reference Values
Males: 1,040.0-2,350.0 mg/24 hr
Females: 740.0-1,570.0 mg/24 hr
Day(s) Test Set Up
Monday through Sunday
Test Classification and CPT Coding
82570-Creatinine
81050-Urine timed measurement (if appropriate)