BUN (UREA NITROGEN)
Abbreviation
BUN
Transport Temp
2-8 C (ice packs)
Stability
store at 2-8 C up to 7 days, -20C up to 1 year
Minimum Vol
0.5 mL
Alternative Specimens
Plasma (lithium heparin or sodium heparin)
Reference Ranges
<50 years of age: Male 8.9-20.6 mg/dL Female 7.0-18.7 mg/dL >50 years of age: Male 8.4-25.7 mg/dL Female 9.8-20.1 mg/dL
Collection Instructions
Routine venipuncture
Transport Container
Draw tube or plastic pour off tube
Methodology
Urease
Clinical Significance
evaluation of kidney function, requested in conjuction with creatinine for the differential diagnosis of prerenal(cardiac decompensation, water depletion, increased protein catabolism), renal (glomerulonephritis, chronic nephritis, polycystic kidney, nephrosclerosis, tubular necrosis), and postrenal (onstructions of the urinary tract) hyperuremia.
Alternative Names
Urea Nitrogen
Anything else included in test?
N/A
Preferred Specimen
Serum