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HelpTest ID NBLD0163 Urea Nitrogen, Urine
Synonym
Urea Urine, UNR, BUN
Specimen Type/Requirements
Non-Sterile Container - Urine, Random (preferred)
Sterile Container - Urine, Random
Red top (Serum w/out gel) tube – Urine, Random (Sioux Falls, Fargo only)
Conical Yellow-top tube no preservatives (Lawson #6185749) - Urine, Random
Sioux Falls, Fargo
Test may be affected by gross hemolysis, gross icterus and gross lipemia.
Bismarck
Acidify to pH <4.0 with 6N HCL prior to testing. Centrifuge before testing.
Specimen Volume
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 0.5 mL |
Stability/Transport
Sioux Falls, Fargo
| Room Temperature | 2 days | |
|---|---|---|
| Refrigerated | 7 days | Preferred for transport |
| Frozen | 1 month |
Bismarck
| Room Temperature | Not Acceptable | |
|---|---|---|
| Refrigerated | 7 days | Preferred for transport |
| Frozen | Not Acceptable |
Performed Test Frequency
Monday through Sunday
Report Available
1 - 3 days
Methodology
Sioux Falls, Fargo
Enzymatic (Urease)
Bismarck
Urease GLDH
Performing Lab
Sanford Laboratories Sioux Falls, Fargo, Bismarck
CPT
84540