Within 24 hours
24-hour urine with no additive. Refrigerate during collection. Also acceptable: Random urine.
Transfer 3 mL aliquot from a well-mixed 24-hour collection to an ARUP Standard Transport Tube. (Min: 0.5 mL) Record total volume and collection time interval on transport tube and test request form.
Urine collected with acid. Specimens stored at room temperature.
Ambient: 48 hours; Refrigerated: 1 week; Frozen: 1 month
No compliance statements are in use for this test.
Reference interval for random urine has not been established.
|Component Test Code*||Component Chart Name||LOINC|
|0020207||Creatinine, Urine - per volume||2161-8|
|0020208||Creatinine, Urine - per 24h||2162-6|
|0020216||Urine Urea Nitrogen - mg/dL||12967-6|
|0020217||Urea Nitrogen, Urine g/day||3096-5|
- urine urea nitrogen clearance