Urea Nitrogen (UN) in Serum/Plasma - Blood Urea Estimate - Blood Urea Nitrogen (BUN)
Specimen Collection Requirements
Serum or Plasma, one 5.0 mL gold (SST), 7.0 mL red or 3.0 mL mint green (lithium heparin, PST) top tube
Allow serum to clot completely at room temperature (minimum: 30 minutes). Preferably, separate serum or plasma from cells before transport.
Grossly hemolyzed specimens
Lithium heparin specimens (PST) are stable up to 7 days refrigerated on the primary spun gel tube AFTER SEPARATION FROM CELLS: Ambient (18-25°C): 24 hours; Refrigerated (2-8°C): 7 days; Frozen (at or below -20°C): 3 months
Samaritan Health Services Laboratories
ADULT: 8-21 mg/dL
Age adjusted ranges.
Diet and age dependent.
Note: Except for dialysis patients
Thursday, January 5, 2017 03:42:33 AM