Which statement describes EDTA use and tests that require it as an anticoagulant?

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Multiple Choice

Which statement describes EDTA use and tests that require it as an anticoagulant?

EDTA works as an anticoagulant by binding calcium, which is essential for many steps of the blood clotting cascade. By removing calcium, EDTA prevents clot formation, making it ideal for samples used in hematology. That is why it is chosen for complete blood counts and peripheral blood smears—these tests rely on intact, well-preserved cells and accurate counts, which clotting would distort. EDTA tubes also help preserve DNA and other nucleic acids, so some molecular tests can use EDTA-preserved samples without the clotting problem interfering with analysis. It is not a dye, and it should not accelerate clotting; in fact, it prevents clotting.

EDTA works as an anticoagulant by binding calcium, which is essential for many steps of the blood clotting cascade. By removing calcium, EDTA prevents clot formation, making it ideal for samples used in hematology. That is why it is chosen for complete blood counts and peripheral blood smears—these tests rely on intact, well-preserved cells and accurate counts, which clotting would distort. EDTA tubes also help preserve DNA and other nucleic acids, so some molecular tests can use EDTA-preserved samples without the clotting problem interfering with analysis. It is not a dye, and it should not accelerate clotting; in fact, it prevents clotting.

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