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Veterinary Technician

Category - Lab Procedures

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Sally is performing venipuncture to collect a whole blood sample for a CBC. Which color tube does she need to preserve her sample?

Green top
Red top
Purple top
Blue top

Explanation

Answer: C - The sample tube needed to preserve whole blood following venipuncture is the purple top (or lavender top) tube. It contains the additive ethylene diamine tetra-acetic acid (EDTA). This additive prevents the blood from clotting.

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