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HelpTest ID NBLD0184 Urea Nitrogen, Quant, 24 Hr Urine
Synonym
BUN, UNU
Specimen Type/Requirements
24 Hour Urine Container - Urine aliquot from a well mixed and measured 24 Hour Urine (preferred)
24 Hour Urine Container - Complete 24 Hour Urine Collection (also acceptable)
Refrigerate during collection, no preservative, record total volume, mix well before aliquoting. If more than on urine container is collected, use proportional quantities from each well mixed container for the aliquot.
See 24-Hour Urine Collection Instructions English
See 24-Hour Urine Collection Instructions Spanish
Sioux Falls, Fargo
Test may be affected by gross hemolysis, gross icterus and gross lipemia.
Bismarck
Acidify to pH <4.0 with 6N HCL priot to testing. Centrifuge before testing.
Specimen Volume
Sioux Falls, Fargo
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 0.5 mL |
Bismarck
| Preferred Volume | 1.0 mL |
|---|---|
| Minimum Volume | 1.0 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