What additive is found in White top tube and what tests is it commonly used for?

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Multiple Choice

What additive is found in White top tube and what tests is it commonly used for?

A white top tube with an additive of K2EDTA in combination with a gel barrier is designed for molecular diagnostic testing. The EDTA chelates divalent cations, inhibiting nucleases and providing an anticoagulant effect, which helps preserve the integrity of nucleic acids (DNA/RNA) in the sample. The gel barrier separates plasma from cellular components after centrifugation, reducing contamination and inhibitors that could interfere with downstream molecular assays like PCR or sequencing. This makes it the preferred choice when the goal is accurate nucleic acid testing. In contrast, other tubes serve different purposes: a simple EDTA additive is commonly used for complete blood counts because it best preserves blood cell morphology; lithium heparin is used for many chemistry panels; sodium fluoride is the glycolysis inhibitor used primarily for glucose testing.

A white top tube with an additive of K2EDTA in combination with a gel barrier is designed for molecular diagnostic testing. The EDTA chelates divalent cations, inhibiting nucleases and providing an anticoagulant effect, which helps preserve the integrity of nucleic acids (DNA/RNA) in the sample. The gel barrier separates plasma from cellular components after centrifugation, reducing contamination and inhibitors that could interfere with downstream molecular assays like PCR or sequencing. This makes it the preferred choice when the goal is accurate nucleic acid testing.

In contrast, other tubes serve different purposes: a simple EDTA additive is commonly used for complete blood counts because it best preserves blood cell morphology; lithium heparin is used for many chemistry panels; sodium fluoride is the glycolysis inhibitor used primarily for glucose testing.

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