Phlebotomy Technician Practice Exam (NCPT/CPT) 2025 - Free Phlebotomy Practice Questions and Study Guide

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What should be drawn first in the order of collection in a capillary draw?

Serum

Plasma

Blood gases

In a capillary draw, blood gases should be drawn first in the order of collection. This is because blood gases are highly sensitive and any delay in the collection process could lead to inaccurate results. Serum and plasma, on the other hand, can be drawn after blood gases because they are more stable and less affected by the delay in collection. EDTA is typically used for other tests and is not the recommended first draw in a capillary collection.

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EDTA

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