Red
red top
Lavender color tube containing the anticoagulant EDTA is ideal for CBC test.
potassium oxalate and sodium fluoride
The colors mean different things in different countries. If you want a correct (reliable)answer, try again with the specification of your country. Green Top tubes contain Lithium Heparin. Blue top tubes contain Sodium Citrate.
EDTA, lavender top tube
Most likely its lavender top tube, EDTA anticoagulant. Please review chemistry or phlebotomy manual about BNP test in your laboratory. It may be different.
A red tube is a zero additive tube, when testing for Lupus we need whole blood, so that means an anticoagulant is needed a. EDTA is in Lavender or Pink Hematology tubes and is used for ANA tests.
Serum
red top is plain tube, for clotted blood. purple top is edta tube, for blood cytology. grey top tube contain sodium flouride anti coagulant for blood sugar. green top tube contains heparin require for cd4, cd8, etc. sky blue top tubes contain sodium citrate 3.2% for bleeding disorder tests such as pti etc.
Blue top or Light Blue top tube
blue top
Either an SST or Red-top tube.