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Epic Test Code LAB21107 Urea Nitrogen: Pre BUN

Performing Location(s)

BMC,HRK

Synonyms

BUN: Dialysis

Specimen Type

Serum or Plasma

Preferred Container

Gold or Red top tube

Alternate Container

Green top tube

Blood Tube Draw Volume

Min 50% draw volume  

Minimum Volume to Submit for Testing

0.5 mL Serum or Plasma

  • Multiple test can be performed from this volume. For question please contact the lab at 547-3975.  

Storage Requirements

Sample tubes should be centrifuged within 2 hours of collection followed by transfer of the serum (red or gold top) or plasma (green top) to a labeled plastic, aliquot tube.

See Causes of Rejection for temperature requirements.

Transportation Needs

Deliver specimen to laboratory within 1 hour of collection if unspun. If not possible see "storage Requirements". 

Causes for Rejection

Mislabeled or unlabeled specimen
Less than 50% draw for Vacutainer tubes
> 4 day Refrigerated
>24 hours Room Temperature
> 60 days Frozen
Hemolysis > 500 mg/dL HgB
Lipemia > 500 mg/dL Trig
Bilirubin > 20 mg/dL Bili

Reference Interval

All Population Units Reference Range 
  mg/dL 7-25

 

Additional Information

Contraindications:

Use of these test codes are restricted to the specific needs of the Dialysis Unit

 

NOTE: Each specimen and requisition must be labeled to clearly identify the collection type

Limitations

This method reacts quantitatively within ammonium ions

Days of Analysis

All

Available STAT

Yes

Methodology

Beckman AU/Dx Series

CPT Code

84520

Last Updated

18-Mar-22 BHD