Creatinine, Urine - per 24h
Also known as: UCRT
Use
The Creatinine, Urine - per 24h test is used to evaluate kidney function by measuring the amount of creatinine in a 24-hour urine sample. It aids in diagnosing kidney stones, assessing kidney disease, and managing patients with kidney-related conditions. The test provides significant insights into the patient's renal status by estimating the creatinine clearance rate, an important marker of glomerular filtration rate (GFR).
Special Instructions
Collect 24-hour urine with refrigeration during collection. Also acceptable is random urine, but without reference intervals. Record total volume and collection time on transport tube and test request form. Specimens previously preserved with 6M HCl, boric acid, or 5 percent NaOH are also acceptable.
Limitations
This test must be used in the context of a 24-hour urine collection for accurate results. Deviations in collection time or volume can affect the interpretation of results. The test requires accurate recording of total volume and collection time to ensure correct calculation of creatinine clearance. Incorrect preservation or storage conditions may compromise sample stability, impacting result accuracy.
FDA ApprovedNew York Approved
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 2162-6
- 19153-6
- 30211-7
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
3 mL aliquot
Minimum Volume
0.5 mL
Container
ARUP standard transport tube
Collection Instructions
Specimen must be refrigerated during collection. Also acceptable are specimens previously preserved with 6M HCl, boric acid, or 5 percent NaOH.
Storage Instructions
Refrigerated storage is required.
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 14 days |
| Refrigerated | 1 month |
| Frozen | 6 months |