CPT (Certified Phlebotomy Technician) Practice Exam

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EDTA is a coagulant. True or False?

  1. True

  2. False

  3. Partially true

  4. Uncertain

The correct answer is: False

The statement is false because EDTA, which stands for ethylenediaminetetraacetic acid, is actually an anticoagulant, not a coagulant. It is commonly used in the collection of blood samples for laboratory testing because it effectively binds calcium in the blood, which is essential for the coagulation process. Without calcium, the blood cannot clot, making EDTA an important additive in blood collection tubes when the goal is to prevent clotting and ensure accurate test results for parameters such as complete blood counts (CBCs). This property distinguishes it from coagulants, which promote the clotting of blood.

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