Urea Nitrogen (BUN), Plasma or Serum*

Important Note

*This test is orderable in Cerner as BUN

Colorimetric Absorbance

Rutland Regional Medical Center Laboratory

Specimen Type: Blood

Container/Tube:

Preferred: Light-green top (lithium heparin gel)

Acceptable: Gold top, serum gel

Specimen Volume: Full tube

Specimen Minimum Volume: 2 mL

Collection Instructions:

1. Send specimen in original tube.

2. If there is a delay in transport of >1 hour, centrifuge tube.

Refrigerated

7-18 mg/dL

Daily

Analytical Time:

1 day

Available Stat

84520

>80 mg/dL (automatic call-back)