Test Details
Result Turnaround Time
Within 1 day
Turnaround time is defined as the usual number of days from the date of pickup of a specimen for testing to when the result is released to the ordering provider. In some cases, additional time should be allowed for additional confirmatory or additional reflex tests. Testing schedules may vary.
Test Includes
Creatinine, 24-hour urine; creatinine, urine; eGFR calculation; urea nitrogen, 24-hour urine; urea nitrogen, urine
Use
Renal function test
Special Instructions
State total 24-hour urine volume on the request form.
Specimen Requirements
Specimen
Urine (24-hour)
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 (ie, 8 AM the 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.
Stability Requirements
Temperature | Period |
|---|---|
Room temperature | 7 days |
Refrigerated | 14 days |
Frozen | 14 days |
Freeze/thaw cycles | Stable x3 |
Storage Instructions
Room temperature
LOINC® Map
| Order Code | Order Code Name | Order Loinc | Result Code | Result Code Name | UofM | Result LOINC |
|---|---|---|---|---|---|---|
| 317222 | UREA and Creatinine, 24-Hr Ur | 81232-1 | 013672 | Creatinine, Urine | mg/dL | 2161-8 |
| 317222 | UREA and Creatinine, 24-Hr Ur | 81232-1 | 013227 | Creatinine, Ur 24hr | mg/24 hr | 2162-6 |
| 317222 | UREA and Creatinine, 24-Hr Ur | 81232-1 | 013508 | Urea Nitrogen, U | mg/dL | 3095-7 |
| 317222 | UREA and Creatinine, 24-Hr Ur | 81232-1 | 013236 | Urea Nitrogen, 24hr | g/24 hr | 3096-5 |
| Order Code | 317222 | |||||
| Order Code Name | UREA and Creatinine, 24-Hr Ur | |||||
| Order Loinc | 81232-1 | |||||
| Result Code | 013672 | |||||
| Result Code Name | Creatinine, Urine | |||||
| UofM | mg/dL | |||||
| Result LOINC | 2161-8 | |||||
| Order Code | 317222 | |||||
| Order Code Name | UREA and Creatinine, 24-Hr Ur | |||||
| Order Loinc | 81232-1 | |||||
| Result Code | 013227 | |||||
| Result Code Name | Creatinine, Ur 24hr | |||||
| UofM | mg/24 hr | |||||
| Result LOINC | 2162-6 | |||||
| Order Code | 317222 | |||||
| Order Code Name | UREA and Creatinine, 24-Hr Ur | |||||
| Order Loinc | 81232-1 | |||||
| Result Code | 013508 | |||||
| Result Code Name | Urea Nitrogen, U | |||||
| UofM | mg/dL | |||||
| Result LOINC | 3095-7 | |||||
| Order Code | 317222 | |||||
| Order Code Name | UREA and Creatinine, 24-Hr Ur | |||||
| Order Loinc | 81232-1 | |||||
| Result Code | 013236 | |||||
| Result Code Name | Urea Nitrogen, 24hr | |||||
| UofM | g/24 hr | |||||
| Result LOINC | 3096-5 |