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BUN
MessageAfter centrifugation, if not in gel barrier tube, pour off plasma or serum into an aliquot tube.
Test Code
LAB140
Alias/See Also
Blood urea nitrogen
CPT Codes
84520
Preferred Specimen
Lithium Heparin (PST)
Minimum Volume
4.5mL (600uL minimum)
Other Acceptable Specimens
Gold (SST)
Instructions
Spin PST or SST and send to lab
Transport Container
1 ml (200 ul minimum) plasma; alternate-serum
Transport Temperature
Room temp
Specimen Stability
Separated from cells: 24 hours room temp, 5 days refrigerated
Methodology
Enzymatic conductivity rate
Setup Schedule
Mon- Sun
Reference Range
Serum/Plasma Reference Range = 6.0 – 20.0 mg/dL
Clinical Significance
Icteric: >20mg/dL bilirubin; Hemolysis: >500 ug/dL; Lipemia: 500mg/dL
Performing Laboratory
Piedmont Athens Regional
