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hematology
test tubes
Color | Uses | Additive |
---|---|---|
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 |