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Test Code BUN. BUN

Additional Codes

N.BUN

Methodology

Automated Chemistry Analyzer

Specimen Requirements

Specimen Type: Serum or Plasma
Container/Tube: SST or Lithium Heparin
Specimen Volume: 1 mL (minimum 0.5)
Collection Instructions: 

  1. Allow specimen to clot completely if a serum tube (SST) was used.
  2. Separate serum (SST) or plasma (Lithium Heparin) from cells within 24 hours and transport refrigerated. If red top tube is collected, separate serum from cells within 2 hours and place in separate plastic tube.
  3. Properly label tube with patient's name, DOB, requisition number and type of tube, i.e. LiHep or NaHep etc.

Specimen Transport/Stability

Store and transport refrigerated

Refrigerated: 24 hours on gel, 6 days poured off

Specimen Rejection

1. EDTA, sodium citrate or sodium fluoride-oxalate plasma specimens

2. Hemolysis

Maximum Laboratory Time

24 to 48 hours

Reference Ranges

BUN          mg/dL
Newborn      6 - 34
1 yrs      5 - 17
4 yrs      7 - 17
14 yrs      8 - 28
20 yrs  F      7 - 20
            M      8 - 26

 

 

Day(s) Test Set Up

Daily

Test Classification and CPT Coding

84520