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Test Code BUN Urea Nitrogen (BUN), Plasma or Serum

Additional Codes

EPIC:  LAB140

Methodology

Enzymatic Conductivity Rate
Used in the diagnosis and treatment of certain renal and metabolic diseases.

Performing Laboratory

St. Joseph Hospital

Specimen Requirements

Submit only 1 of the following specimens:

Preferred:

Plasma

Draw blood in a light green-top (lithium heparin gel) tube(s). Spin down, separate plasma from cells within 2 hours of draw, and send 1 mL of lithium heparin plasma refrigerated.

Note:  1. Indicate plasma on request form.

2. Label specimen appropriately (plasma).

Alternate:

Serum

Draw blood in a plain, red-top tube(s) or a serum gel tube(s). Spin down, separate serum from cells within 2 hours of draw, and send 1 mL of serum refrigerated.

Note:  1. Indicate serum on request form.

2. Label specimen appropriately (serum).

Reference Values

1-17 years old:  7 - 20 mg/dL

18-60 years old:  6 - 20 mg/dL

> 60 years old:  8 - 23 mg/dL

Critical value:  > 75 mg/dL

Day(s) Test Set Up

Monday through Sunday

Available STAT

Test Classification and CPT Coding

84520