Test Code BUN Urea Nitrogen (BUN)
Performing Laboratory
ChristianaCare:
- Newark Campus
- Middletown Campus
- Helen Graham Cancer Center
- Wilmington Campus
Methodology
Urease/Colorimetric
Specimen Requirements
Container/Tube: Preferred: 4.5 mL Lithium Heparin (Mint Green top PST Gel) tube
Acceptable: 5.0 mL SST (Gold top) tube or 6.0 mL Serum (Red top) tube
Specimen: Full tube
Collection Instructions: For pediatrics, draw blood in a 0.5-mL green-top MICROTAINER®.
Note: Label tube with patient’s full name and 1 additional unique patient identifier such as date of birth, medical record number, emergency ID number, date and time of draw, collector’s initials, and type of specimen.
Reference Values
8-22 mg/dL
Day(s) Test Set Up
Monday through Sunday
Routine Turnaround Time: 8 hours
STAT Turnaround Time: 1 hour