Which vacutainer (blood collection tube) is used for testing blood glucose?

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BlackTom AI · Accepted Answer

The question asks which vacutainer (blood collection tube) is used for testing blood glucose.
Since the provided answer is Grey Top, we start from that premise and explain why it is appropriate.
Grey top tubes are designed for glucose testing because they contain a glycolysis inhibitor (sodium fluoride) and an anticoagulant (potassium oxalate). The fluoride inhibits glycolysis in the collected blood sample, preventing glucose from being metabolized by cells and thus preserving the measured glucose concentration until analysis. This makes Grey Top the standard choice for accurate glucose measurements, especially in serum/plasma glucose testing.
If we were to consider alternatives (not provided here), tubes without glycolysis inhibitors or appropriate anticoagulants could allow ongoing glycolysis or clotting, leading to falsely lower glucose readings or other artifacts. For example, a plain serum or plasma tube without fluoride would not preserve glucose levels reliably without rapid processing.
In summary, Grey Top tubes are specifically formulated to maintain stable glucose levels, which is why they are used for testing blood glucose.

VT122 Clinical Pathology QUIZ on 1/27

Which vacutainer (blood collection tube) is used for testing blood glucose?

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