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specimen tube
color* additive specimen
red none serum
lavender EDTA (Versene) whole blood; binds Ca+2
green heparin thrombin inhibition
blue buffered citrate coagulation tests; binds Ca+2
gray NaF glucose; inhibits glycolysis
yellow citrate dextrose (ACD) erythrocytes
* color of stopper
Specific
black top tube
blue top tube
gray top tube
green top tube
lavender top tube
orange top tube
red top tube
yellow top tube
General
device (medical device)
References
Clinical Diagnosis & Management by Laboratory Methods,
19th edition, J.B. Henry (ed), W.B. Saunders Co.,
Philadelphia, PA. 1996, pg 13