What color tube is tenth in the order of draw for phlebotomy?

What color tube is tenth in the order of draw for phlebotomy?

• A. Red
• B. Lavender
• C. Green
• D. Blue

Answer: (B)

The order of draw in phlebotomy is critical to avoid cross-contamination of additives that could affect lab results. In that sequence, the lavender tube is typically used for hematology tests, such as complete blood counts (CBC), which require anticoagulants to preserve the blood's cellular components for accurate results. By placing the lavender tube tenth in the order of draw, it ensures that any potential contaminants from the previous tubes, which may have different additives (like those in blue or green tubes), do not interfere with the tests performed on samples collected in the lavender tube. This attention to the order of draw helps maintain the integrity of the sample and the reliability of laboratory test results.

The order of draw in phlebotomy is critical to avoid cross-contamination of additives that could affect lab results. In that sequence, the lavender tube is typically used for hematology tests, such as complete blood counts (CBC), which require anticoagulants to preserve the blood's cellular components for accurate results.

By placing the lavender tube tenth in the order of draw, it ensures that any potential contaminants from the previous tubes, which may have different additives (like those in blue or green tubes), do not interfere with the tests performed on samples collected in the lavender tube. This attention to the order of draw helps maintain the integrity of the sample and the reliability of laboratory test results.