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Test Code BUN Urea Nitrogen (BUN)

Additional Codes

EPIC LAB4037

Clinical Significance

Urea Nitrogen or urea measurements are used in the diagnosis and treatment of certain renal and metabolic diseases.

 

Source: Beckman Coulter Unicel, BUN IFU. REF #442750 4/22/15

Methodology

Enzymatic rate method (Beckman Coulter UniCel DxC 660i)

Sample Type

Preferred Sample Type
Light green top - Plasma

 

Acceptable Sample Type(s)
Dark green top - Plasma
Yellow top - Serum
Red top - Serum

Centrifuge: Yes

Specimen Minimum Volume

0.3 mL

Specimen Stability

Temperature Time
Ambient (18-25°C) 8 hours
Refrigerated (2-8°C) (store) 48 hours
Frozen (-15 to -20°C) 1 month

Separate plasma or serum from cells within 2 hours.

Reference Ranges

Normal Range
>1 Month Old 8 - 25 mg/dL
<1 Month Old 8 - 28 mg/dL

 

Critical Value
>90 mg/dL mg/dL

 

Technical Range
5 - 200 mg/dL

Rejection Criteria

Hemolysis N/A
Icteric N/A
Lipemia N/A

Availability

Performed STAT
24/7 Yes

 

Performing Laboratory

MultiCare Yakima Memorial Hospital Laboratory

Lab Department

Chemistry

CPT Code

84520

LOINC

3094-0 Urea nitrogen [Mass/Vol]