What are some types of blood collection tubes?

By Forinfos - 01/03/2026 - 0 comments

Some types of blood collection tubes include the green-top tube, grey-top tube, lavender-top tube, red-top tube, and royal blue-top tube, notes Mayo Medical Laboratories. Others include the serum gel tube and yellow-top tube.

Laboratory technicians invert the tubes immediately after drawing blood to prevent coagulation, notes Mayo Medical Laboratories. Some of the tubes contain a particular component that acts as an anticoagulant. For example, the green-top tube has sodium heparin and the light blue-top tube has sodium citrate. The red-top Tube has no anticoagulant, and doctors use it to collect serum. Doctors use the yellow-top tube to collect whole blood for special tests.

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