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Tubes and Additives
Phlebotomy evacuated containers
Question | Answer |
---|---|
Red top | None |
Red/Gray Marbled | Clot activator (silica particles)/thixotropic gel |
Yellow top | SPS (prevents blood from clotting and stabilizes bacterial growth) |
Gold | Clot activator (silica particles)/thixotropic gel |
Light blue | Sodium citrate: removes calcium to prevent blood from clotting |
Green | Heparin (sodium/lithium/ammonium): inhibits thrombin formation to prevent clotting |
Green-gray marbled | Lithium heparin and gel for plasma separation |
Light green | Lithium heparin and gel for plasma separation |
Yellow-gray marbled | Thrombin |
Orange | Thrombin |
Lavender | EDTA: removes calcium to prevent blood from clotting |
Gray | Potassium oxalate and sodium fluoride: removes calcium to prevent blood from clotting while the fluoride inhibits glycolysis |
Royal blue | Sodium Heparin (also sodium EDTA); inhibits thrombin formation to prevent clotting |