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BUN (BLOOD UREA NITROGEN)
Test CodeLAB140
CPT Codes
84520
Preferred Specimen
One 4.5 mL light green top tube
Pediatric: One light green top microtainer
Pediatric: One light green top microtainer
Other Acceptable Specimens
Dark Green top, Red top, or Gold top tube
Instructions
Sample must be centrifuged within 2 hours of collection. Serum/plasma must be removed from the red cells and put into aliquot tubes following centrifugation.
Transport Temperature
Refrigerated
Specimen Stability
Centrifuge within 2 hours of collection Ambient: 7 days Refrigerated: 7 days Frozen: 1 year
Reject Criteria (Eg, hemolysis? Lipemia? Thaw/Other?)
Gross hemolysis
Methodology
Conductometry
Setup Schedule
Sunday-Saturday
Reference Range
BUN 0 -13 years: 5-20 mg/dL
13 years and older: 8-25 mg/dL
BUN/Creatinine Ratio 6-22
13 years and older: 8-25 mg/dL
BUN/Creatinine Ratio 6-22
Performing Laboratory
West Virginia University Hospital, Inc.
Bluefield Pavilion Campus Berkeley Medical Center Barnesville Hospital Braxton County Memorial Camden Clark Medical Center Camden Clark Medical Center Fairmont Medical Center Garrett Regional Medical Center Harrison Community Hospital Jackson General Hospital Jefferson Medical Center Princeton Community Hospital Potomac Valley Hospital Reynolds Memorial Hospital Summersville Regional Medical Center St. Joseph’s Hospital United Hospital Center Uniontown Hospital Wetzel County Hospital Wheeling Hospital