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test tubes

Purple top Hematology(CBC) and Blood Bank (crossmatch); requires full draw- invert 8 times to prevent clotting and platelet clumping EDTA
Green top for lithium level, use sodium heparin For ammonia level, use sodium or heparin, HPB Sodium heparin or lithium heparin
Light Blue Top Coagulation tests(protime and prothrombin time), full draw required Sodium citrate
Light brown top Serum lead determination Sodium heparin
Black Top Westergren Sedimentation Rate; requires full draw Sodium citrate (buffered)
Light Gray Top Glucoses, requires full draw (may cause hemolysis if short draw) Sodium fluoride and potassium oxalate
Yellow Top HLA tissue typing, paternity testing, DNA studies ACD(acid-citrate-dextrose)
Light green top chemistries Plasma Separating tube(PST) with lithium heparin)
Orange top STAT serum chemistries Thrombin
Pink top Molecular/viral load testing Potassium EDTA
Gold top Chemistries, Immunology and serology None
Yellow-black top Microbiology-aerobes, anaerobes, fungi Broth mixture
Dark blue top Trace element testing(zinc, copper, lead, mercury) and toxicology EDTA-
Red top Chemistries, Immunology and Serology, Blood bank(crossmatch) None
Created by: star17mar