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HelpTest Code LAB449 Urea Nitrogen 24 Hour Urine
Test Performed By
Cayuga Medical Center, Main Laboratory
Container Name
URINE 24H
Acceptable Preservatives
| Test | Preservative/Acceptable (Yes/No) | ||||
| Unpreserved | Acetic Acid | Boric Acid | Sodium Carbonate | 6N HCL | |
| Urine Creatinine LAB712 | Yes | No* | Yes | No* | Yes |
| Urine & Serum Creatinine Clearance LAB1765** | Yes | No* | Yes | No* | Yes |
| Urine Total Protein LAB441 | Yes | No | No* | No | No |
| Urine Microalbumin LAB410 | Yes | No | No* | No | No |
| Urine Urea Nitrogen LAB449 | Yes | Yes | Yes | Yes | Yes |
| Urine & Serum Urea Nitrogen Clearance LAB749** | Yes | Yes | Yes | Yes | Yes |
| Urine Electrolytes LAB19204 | Yes | No* | No* | No | No |
| Urine Potassium LAB436 | Yes | No* | No* | No* | No* |
| Urine Sodium LAB446 | Yes | No* | No* | No | No* |
| Urine Chloride LAB375 | Yes | No* | No* | No* | No |
| *If unable to perform in house testing but able to send out, cancel and order a miscellaneous test (GO23910). Refer to Mayo Clinic Labs (MCL) Urine Preservative Chart for test codes and additional preservative information. | |||||
| **Tests require both serum and urine specimens | |||||
Day(s) and Time(s) Test Performed
Monday through Sunday; Continuously
List Price
$56.00
CPT Codes
84540
Temperature
Refrigerated
Clinical and Interpretive
Urea nitrogen is a breakdown product of protein that is excreted by the kidneys in urine.
Specimen Type
24 Hour Urine
Specimen Volume
30 mL
Minimum Specimen Volume
10 mL
Specimen Stability
Stability: 48 hours