Blood Urea Nitrogen

Specimen Requirements

1.0 mL Plasma from a PST Mint Green Top Tube - Lithium Heparin (preferred)
or
1.0 mL Serum in a SST Gold Top Tube

Alternate Specimen

1.0 mL Serum from a Red Top Tube in a Plastic Vial 
or
1.0 mL Plasma from a Lavender Top Tube - EDTA in a Plastic Vial
This alternative specimen is only an option at the PHH, PLH, PNH, PVH, and PWH
or 
1.0 mL Plasma from a Green Top Tube - Li Heparin in a Plastic Vial

TransportAndStorage

7 days Refrigerated

72 hours unspun

Collection Instructions

 

Minimum Volume

0.2 mL Plasma or Serum

Neonatal Volumne

0.3 mL Whole Blood Green Microtainer

Reference Range:

Male > 20 years: 9 -21 mg/dL
Female > 20 years: 7 - 18 mg/dl 

Critical Ranges:

Infants in a PH Neonatal Intensive Care Units (NICU): 
>50 mg/dL

Pediatric to Adult
>100 mg/dL

Methodology:

• Photometric

CDM

01420102

CPT Coding

84520