CPT (Certified Phlebotomy Technician) Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

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What is sodium heparin used for?

Calcium levels

Glucose levels

Ammonium levels

Sodium heparin is commonly used as an anticoagulant in blood collection tubes. It prevents the blood from clotting by inhibiting the clotting factors. Therefore, it is not used to measure calcium, glucose, or sodium levels. Instead, sodium heparin tubes are typically used for tests such as ammonium levels.

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Sodium levels

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