Test Code U24_UN Urea Nitrogen 24 Hour Urine
EHR Test Codes
| Test Code | Test Name | |
| Atlas | U24_UN | Urea Nitrogen 24 Hour Urine |
| Cerner | Urea Nitrogen 24 Hour Urine |
Specimen Requirements
Preparation of Patient:
None.
Specimen Collection Instructions:
- It is recommended you begin the 24 hour urine collection in the morning.
- At the time you choose to start the collection, urinate into the toilet and flush as usual. DO NOT SAVE this urine in the jug. Record this start date and time on the jug label.
- For the next 24 hours collect all urine and add to the jug. Do not urinate directly into the jug if a preservative has been added.
- All urine is needed for accurate testing. If you fill the jug, continue the collection into any clean, dry, leak proof container. Call the labroatory for instructions if you have omitted or spilled any urine 231-935-6100 prompt 4.
- Keep the jug refrigerated during the entire collection. Refrigerate or store in a cooler with ice.
- Exactly 24 hours after th start time, urinate and ADD this last urine sample to the jug. Record this end date and time on the jug label. Collection is completed.
- Within 3 hours or less of completing the collection, deliver the jug and your lab order to the laboratory (preferably a hospital laboratory). Keep the jub cool during transport.
Container Type:
24 Hour Urine Container without preservative
or
White Top 6mL No Additive Tube
Specimen Type:
24 hour Urine without preservative
Specimen Volume:
24 hour Urine minimum .5 mL
Note: Total volume must be recorded on container
Specimen Handling/Transport:
Transport refrigerated 2 - 8°C.
MHC Labroatories: Mix urine and aliquot into White Top 6ml No Additive Tube via urine transfer straw. Record total volume on container label. Transport refrigerated 2-8°C.
Specimen Stability/Storage:
3 days refrigerated 2-8°C
Specimen Rejection:
Samples in preservatives
Performing Laboratory
Munson Medical Center Laboratories
Chemistry Department
Priority, Frequency, & Turnaround
Priority:
Non-Emergent
Frequency:
24 hours 7 days a week
Turnaround:
0 - 1 days
Methodology
Urease
Reporting
Reference Range:
12 - 20 mg/24 hr
Critical Decision:
None
Clinical Significance
Urine urea nitrogen serves as an aid in diagnosing liver and renal disease
CPT Code(s)
84540