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Lab Manual for Moffitt-Long and Mount Zion

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Urea Nitrogen, Serum / Plasma

Item Value
Approval req'd? No
Available Stat? Yes
Test code BUN
Test group Urea
Performed by Parnassus & Mt. Zion Chemistry
In House Availability Test available 24 hours per day 7 days per week
Method Enzymatic conductivity, kinetic (urease)
Container type Gold top or Light Green top
Amount to Collect 1 mL blood Click here for Microdetermination info
Sample type Serum or plasma
Preferred volume 0.5 mL serum or plasma
Min. Volume 0.2 mL serum or plasma 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 2/17/2012 9:55:44 AM
Entry Number 965
Lab Procedure Link Click here for Procedure
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