Urea Nitrogen and Creatinine Profile, 24-Hour Urine
Also known as: Creatinine and Urea, 24-Hour Urine, Urine Creatinine, Urine Urea Nitrogen
Use
Renal function test
Special Instructions
The total 24-hour urine volume must be stated on the request form to ensure accurate assessment.
Limitations
This test is limited to the measurement of urea nitrogen and creatinine concentration in a 24-hour urine sample. Factors such as incomplete urine collection, dehydration, or excessive fluid intake can affect the accuracy of the test results. Additional tests may be needed for a comprehensive evaluation of renal function.
Methodology
Automated Analyzer (Clinical Chemistry)
Biomarkers
LOINC Codes
- 81232-1
- 2161-8
- 2162-6
- 3095-7
- 3096-5
Result Turnaround Time
1 day
Related Documents
For more information, please review the documents below
Specimen
Urine
Volume
10 mL aliquot of entire collection
Minimum Volume
1 mL aliquot
Container
Plastic urine container, no preservative
Collection Instructions
Instruct the patient to void at 8 AM and discard the specimen. Then collect all urine, including the final specimen voided at the end of the 24-hour collection period (8 AM following morning). Fasten the lid securely. The container must be labeled with the patient's full name, the date and time the collection began, and the date and time collection ended.
Storage Instructions
Room temperature
Stability Requirements
| Temperature | Period |
|---|---|
| Room Temperature | 7 days |
| Refrigerated | 14 days |
| Frozen | 14 days |