Grey Top Tube. White puff sleeve twist bandeau. Remove tube leaving transfer straw in specimen container.
Centrifuge at approximately 2500rpm for 10 15 minutes. It contains potassium oxalate with sodium fluoride as the anticoagulant. Fasting specimen is not required.
Label gray top with at least 2 patient identifiers and source.
There is now a move towards using the purple top aka. After the tube has been filled with blood immediately invert the tube gently several times to prevent coagulation. Serum no additive or sodium heparin white top order of the draw to prevent contamination of tubes with additives from other tubes it is important to draw the tubes in a specific order called the order of the draw. Remove tube leaving transfer straw in specimen container.