Screening test to evaluate kidney function.
Within 24 hours
Plasma separator tube or serum separator tube.
Allow specimen to clot completely at room temperature. Separate serum or plasma from cells ASAP or within 2 hours of collection. Transfer 1 mL serum or plasma to an ARUP Standard Transport Tube. (Min: 0.2 mL)
Specimens containing sodium fluoride.
After separation from cells: Ambient: 1 week; Refrigerated: 1 week; Frozen: 1 year
By report (reports may vary based on instrumentation)
|Component Test Code*||Component Chart Name||LOINC|
|0020023||Urea Nitrogen, Serum or Plasma||3094-0|
- urea nitrogen clearance
- Blood Urea Nitrogen