Phlebotomist Exam Prep

Category - Procedures & Tubes

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Which colored top indicates a tube containing the additive EDTA?

Light blue
Dark blue
Lavender
Gray

Explanation

Answer: C - Lavender or purple-topped collection tubes indicate presence of the additive EDTA. Lavender tops will contain either EDTA, EDTA K2 or EDTA K3. Generally, EDTA is used for studies on whole blood, EDTA K2 tubes are used for molecular studies of whole blood.

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