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