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Med Lab M.Phlebotomy
Color tubes uses & additives
| Question | Answer |
|---|---|
| Green top | Sodium Heparin & lithium heparin For lithium level, use sodium heparin. For ammonia level, use sodium or lithium heparin. |
| Light blue top | Sodium citrate. Coagulation tests (protime and prothrombin time), full draw required. |
| Purple top | Hematology(CBC) and blood Bank (Crossmatch); requires full draw-ivert 8 times to prevent clotting and platelet clumping. |
| Red top | None. Chemistries, Immunology and Serology, Blood Bank (Crossmatch) |
| Light green top | Chemistries |
| Black top | Sodium citrate (buffered) Westergren Sedimentation Rate; requires full draw |
| Light gray top | Glucoses, requires full draw (may cause hemolysis if short draw) |
| Gold top | None. Chemistries, Immunology and Serology |
| Dark blue top | EDTA- Trace element testing (zinc, copper, lead, mercury) and toxicology |
| Pink top | Molecular/viral load testing |
| Yellow top | ACD (acid-citrate-dextrose) HLA tissue typing, paternity testing, DNA studies |
| Orange top | Thrombin STAT serum chemistries |
| Light brown top | Serum lead determination |
| Yellow-black top | Microbiology - aerobes, anaerobes, fungi |