Test Mnemonic
BUNRF
CPT Codes
Aliases
- Blood Urea Nitrogen, Pre/Post
Includes
- BUN, Pre Dialysis
- BUN, Post Dialysis
- Urea Reduction Ratio
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
Reference Range
| BUN, Post Dialysis |
| 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 |
Male | 18 Years | 99 Years | Normal | 9-24 | mg/dL |
Female | 18 Years | 99 Years | Normal | 7-21 | mg/dL |
| BUN, Pre Dialysis |
| 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 |
Male | 18 Years | 99 Years | Normal | 9-24 | mg/dL |
Female | 18 Years | 99 Years | Normal | 7-21 | mg/dL |
Clinical Info
Evaluation of and monitoring of hemodialysis
