Urea Nitrogen
| Abbrev Code: | BUN | ||
| Order Code: | LAB140 | Order Name: | Urea Nitrogen |
| Methodology: | Roche: Kinetic with urease and glutamate dehydrogenase
Vista: Bichromatic rate St Johns/Woodwinds: Urease |
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| CPT Codes: | 84520 x1, 84520 x1 | ||
| Turnaround Time: | Performed and reported 24 hours/day. | ||
| Associated Links: | |||
Collection Instructions
| Specimen: | Blood |
| Optimal Volume: | 2.5 mL |
| Minimum\Peds Volume: | 0.6 mL |
| Container: | Green (lithium heparin, gel), St Johns/Woodwinds-Green (lithium heparin, no gel) Alternate Containers: Green (lithium heparin, no gel), Red (no gel), Red or gold (gel), St Johns/Woodwinds - Red (no gel) |
Processing and Shipping
| Specimen Processing: | Aliquot 1.25 mL, 0.2 mL minimum. Store in refrigerator. |
| Shipping Instructions: | Ship at refrigerated temperature. |
| Stability: | 7 days at room temperature; 7 days refrigerated; 1 year frozen. |
| Test Performed at or Referral Lab | Chemistry (CSC Maple Grove, CSC Mpls, Grand Itasca, Lakes, Northland, Oxboro Clinic, Range, Roche-Ridges, Roche-UMMC East, Southdale, St. John's, UMMC West Bank, Woodwinds) |
Interpretive
| Critical Range: | Basic, Electrolyte and Renal Panels Critical Values and Reference Ranges |
| Reference Range: | Basic, Electrolyte and Renal Panels Critical Values and Reference Ranges |
| Use: | Indirectly evaluate renal function and hydration. |
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