BUN
Test Mnemonic
BUN
CPT Codes
- 84520 - QTY (1)
LOINC ®
3094-0
Aliases
- Blood Urea Nitrogen
- Urea Nitrogen, Blood
Performing Laboratory
Cleveland Clinic Laboratories
Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Plasma | Lithium heparin PST (Lt. Green) | Centrifuge and refrigerate. | Submit in original tube or aliquot specimen into CCL aliquot tube |
Alternate Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 1 mL | Serum | SST (Gold) | Centrifuge and refrigerate. |
Minimum Specimen Requirements
| Volume | Type | Container | Collect Temperature | Transport Temperature | Special Instructions |
|---|---|---|---|---|---|
| 0.4 mL |
Stability
| Environmental Condition | Description |
|---|---|
| Ambient | 7 days |
| Refrigerated | 7 days |
| Frozen | 1 year |
Days Performed
Sun - Sat
Turnaround Time
8 hours
Methodology
| Name | Description |
|---|---|
| Urease |
Reference Range
| BUN | |||||
|---|---|---|---|---|---|
| Sex | Age From | Age To | Type | Range | Range Unit |
| Days | 364 Days | Normal | 4-19 | mg/dL | 1 Years | 17 Years | Normal | 5-18 | mg/dL | ~ | Critical | >120 | mg/dL | Male | 18 Years | 99 Years | Normal | 9 - 24 | mg/dL | Female | 18 Years | 99 Years | Normal | 7 - 21 | mg/dL |
Clinical Info
Evaluation of renal function