Laboratory Services
Urea Nitrogen, Urine, 24 hr
Print this pageUpdated Test Information:
| Test Description |
Urea Nitrogen, Urine, 24 hr
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|---|---|---|
| Test ID |
UUN24
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| Specimen Type |
Urine
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| Alternate Specimen Type |
None
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| Specimen Requirements |
Urine, 24 hour collection
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| Specimen Collection / Processing Instructions |
Urine, 24 hour collection - Refrigerate the specimen as it is collected.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 next morning). Screw the lid on securely. Container must be labeled with patient's full name, date and time collection started, and date and time collection finished.
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| Minimum Sample Volume |
10 ml aliquot of entire collection
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| Pediatric Min. Volume (if applicable) |
1 ml
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| Stability |
2 days at 20-25 ˚C
7 days at 4-8 ˚C 1 month at -20 ˚C |
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| Unacceptable Specimen Conditions |
Bacterial growth in the specimen and high atmospheric ammonia concentrations as well as contamination by ammonium ions may cause erroneously elevated results.
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| Methodology |
Kinetic/Enzymatic (urease)
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| Estimated TAT |
0-2 days
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| Testing Schedule |
Monday-Saturday
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| CPT Code(s) |
84540
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| Reference Range |
24 hr Urine: 12 - 20 g/24h
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| Performing Lab |
Incyte Diagnostics
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| LOINC Code(s) |
3096-5
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