UCSF Navigation Bar

UCSF Departments of Pathology & Laboratory Medicine Home Page

Lab Manual for UCSF Clinical Laboratories

Lab Manual for SFGH

Internal Resources

Click here for more information about laboratory operations and procedures

If you have additional questions regarding this test, please call: 415-353-1667

Search Our Test Menu

Urea Nitrogen, Plasma / Serum

Item Value
Approval req'd? No
Available Stat? Yes
Test code BUN
Test group Urea
Performed by Parnassus, Mission Bay & Mt. Zion Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Enzymatic conductivity, kinetic (urease)
Container type Light green top preferred, Gold top acceptable
Amount to Collect 1 mL blood
Click here for Microdetermination info
Sample type Plasma or serum
Preferred volume 0.5 mL plasma or serum
Min. Volume 0.2 mL plasma or serum
Click here for Microdetermination info
Units mg/dL
Normal range
0 - 4 years 5-27 mg/dL
≥ 5 years 6-22 mg/dL


Note:
1. Normal range for children 0-5 years adapted from Beckman Coulter's "Pediatric Reference Range Guidelines for Synchron Systems" Bulletin 9345
2. Normal range for adults used for children 5-17 years. Beckman Coulter's "Pediatric Reference Range Guidelines for Synchron Systems" Bulletin 9345 for 5-15 year olds comparable to adult range.
2. Normal range for adults was determined by testing 270 male and female healthy blood donors at UCSF.
Synonyms BUN; SUN
Stability Room temperature 8 hours, refrigerated 2 days, frozen at -20C 1 week
Turn around times STAT 1 hour, Routine 4 hours
Additional information To convert mg/dL to mmol/L (SI units) multiply by 0.357.
CPT coding 84520
LOINC code 3094-0
Last Updated 7/24/2015 8:54:15 AM
Entry Number 965
Lab Procedure Link Click here for Procedure
UCSF home page UCSF home page About UCSF Search UCSF UCSF Medical Center