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Test Code LAB140 Blood Urea Nitrogen

Performing Lab

Arnot Ogden Medical Center/ Ira Davenport Memorial Hospital

Ordering Recommendations

The determination of serum blood urea nitrogen currently is the most widely used screening test for the evaluation of kidney function. The test is frequently requested along with the serum creatinine test since simultaneous determination of these 2 compounds appears to aid in the differential diagnosis of prerenal, renal and postrenal hyperuremia.

Included in BMP, CMP & Renal Panel.

Collect

Serum or Plasma

Collection Device

Lithium Heparin Green Top Tube or Gold Top Tube

Specimen Volume

5 mL

Stability (from collection to initiation)

Room Temp

1 day
Refrigerated 3 days
Frozen 2 months

 

Storage/Transport Temperature

Refrigerated or Frozen

Minimum Requirements

1 mL

Methodology

Enzymatic Conductivity Rate

Start Date

9/13/2017

Last Review Date

06/20/2025

Specimen Handling

Centrifuge within 2 hours of collection.

Remarks

TURN AROUND TIME

STAT

1 Hour
Routine

8 Hours