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RED (GLASS TUBE)
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TEST: chemistry, serology, blood bank
ADDITIVES: none SPECIMEN: serum INVERSION #: 0 NOTES ON PROCESS: blood collected in a red top glass tube must sit 30 minutes to clot: serum is separated by centrifuge after clotting |
RED (PLASTIC TUBE)
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TEST: chemistry, serology
ADDITIVES: clot activators SPECIMEN: serum INVERSION #: 0 NOTES ON PROCESS: blood collected in a red top glass tube must sit 30 minutes to clot: serum is separated by centrifuge after clotting |
LIGHT BLUE
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TEST: coagulation testing
ADDITIVES: sodium citrate SPECIMEN: plasma INVERSION #: 3-4 NOTES ON PROCESS: must fill tube completely to maintain the ratio of 9 parts blood to one part sodium citrate |
LAVENDER
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TEST: complete blood count (CBC)
ADDITIVES: EDTA SPECIMEN: whole blood INVERSION #: 8 NOTES ON PROCESS: none: most common blood test ordered, so lavender tops are the most frequently used |
GOLD OR
RED/GRAY STOPPER |
TEST: most blood chemistry
ADDITIVES: clot activators, thixotropic gel SPECIMEN: whole blood INVERSION #: 5 NOTES ON PROCESS: none, a.k.a., serum separator tubes (SSTs), star tubes, tiger top, or jungles top |