Blood Urea Nitrogen

Test Name

Blood Urea Nitrogen

Alternate Description

BUN

LIS Code

BUN

Availability

24 hours a day, seven days a week

Lab Section

Chemistry

Fluid Type

Plasma

Specimen Tube Type Transport

Gel Green Top

Container Whole Blood Required

4 ml whole blood in a Gel Green Top

Critical Value

Males/Female and all ages the same: >120 mg/dL

Summary Test Name

Blood Urea Nitrogen

Specimen Preparation Outreach

Spin ASAP after collection.  Refrigerate until courier pickup.

Specimen Stability

7 days refrigerated

Minimum Volume

1 full green microtainer or 1 mL in a pediatric green top tube.

Specimen Transport

Refrigerate

Specimen Preparation In House

Spin and refrigerate until analysis

Stat Availability

24 hours a day, seven days a week

Test Turnaround Time Routines And Stats

R 4 hours S 1 hour

Reference Value

Male/Female and all ages the same: 6 - 23 mg/dL