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General Information:

Web Links:

Mayo Clinic Laboratories

Test Code LAB0208587 Urea Nitrogen, (BUN), Post Dialysis, Plasma or Serum

Methodology

Urease

Performing Laboratory

CentraCare Laboratory Services

Specimen Requirements

Specimen Type: Plasma

Container/Tube:

Preferred:  Green top (lithium heparin)

Acceptable:  Serum (Red top, Gold/SST), Na Heparin plasma (label specimen appropriately)

Specimen Volume: 0.5 mL

Minimum Specimen Volume: 0.25 ml

Specimen Transport Temperature

Refrigerated one week/Frozen one week

Reference Values

0-8 days: 2.0-13.0 mg/dL

8-30 days: 2.0-16.0 mg/dL

1-4 months: 2.0-12.0 mg/dL

4-7 months: 1.0-14.0 mg/dL

7-12 months: 2.0-14.0 mg/dL

1-4 years: 5.0-17.0 mg/dL

4-14 years: 7.0-17.0 mg/dL

>14 years: 10.0-20.0 mg/dL

Day(s) Test Set Up

Monday through Sunday

Test Classification and CPT Coding

84520