Urea (blood urea nitrogen, BUN) - photometric
Days test started:
Specimen Type/Volume0.5 mL serum or lithium-heparin plasma.
Shipping InformationShip in insulated container with freezer packs.
Collection ProtocolCollect blood into a red-top vacutainer; avoid hemolysis. Allow the sample to clot. Centrifuge the sample; separate the serum from the cells and transfer to a leakproof, labelled tube. Refrigerate or freeze and ship with freezer packs. Lithium-heparin plasma is acceptable, however laboratory reference intervals are for serum samples.
In the User's Guide - See Clinical Pathology section - Guide to interpretation of AHL biochemistry profiles* - Urea.