National Certified Medical Assistant (NCMA) [ncma]

What is the additive in a lavender-topped tube and what is its purpose?

Sodium Citrate, to prevent coagulation Heparin, to inhibit thrombin formation EDTA, to prevent clotting by binding calcium Clot activator, to promote blood clotting

Correct Answer:

EDTA, to prevent clotting by binding calcium

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