Gray tube
A light blue tube typically requires a 1.9 ratio of anticoagulant to blood. This tube is often used for coagulation studies.
Red
to collect the blood specimenwith no anticoagulant inside the tube
A lavender or light blue tube is typically used for an amylase blood draw as it contains an anticoagulant (lavender tube) or no anticoagulant (light blue tube) needed for the test.
red top
A red-top tube typically contains no anticoagulant. It is used for serum samples where blood is allowed to clot before being centrifuged to separate the serum.
A lavender/purple top tube (containing EDTA anticoagulant) is typically used for an iron test. This anticoagulant helps preserve the sample for accurate testing.
The components of blood found inside a tube drawn with an anticoagulant are plasma, buffy coat, and erythrocytes.
A red tube with no anticoagulant is typically used for an AFP test.
A red top tube containing no anticoagulant or a gel separator tube would be suitable for troponin testing.
The additive in a PST (plasma separator tube) tube is usually a gel or liquid that helps to separate plasma from whole blood after centrifugation. This allows for easier isolation of plasma for various laboratory tests.