Glucose studies use gray top tubes. The additive in grey tubes prevent glycolysis. Lactic acid test also uses a gray top.
no preparation required. tie the tourniquet on upper arm, and using the aseptic technique collect blood in grey top tube.
tube light
The CBC is drawn in a green tube. This is blood testing tubes.
Blood for CBC is usually collected in a purple-top tube (containing EDTA).
First
Gray top tube
the grey tube is used for culture and sensitivity
A complete blood count (CBC) is drawn in a lavender-top tube.
Yellow
green tube
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.
Red/Grey or Yellow
blue top
The count will be artificially low
magnesium
FBS stands for Fasting Blood Sugar level and is drawn to Flox ( grey top) tube. It can also be collected into SST tube.
IT IS A BLOOD COLLECTION TUBE..IT DO PROTECT THE BLOOD SAMPLE AND ITS PLATELETS AND CELLS AS IT ORIGINAL condition for a longer time