Which tube is drawn FIRST in standard order of draw?

Rationale

Red-speckled tube is drawn FIRST in standard order of draw.

In the standard order of draw for blood collection, the red-speckled tube is the first to be drawn. This practice minimizes the risk of contamination from additive tubes that follow, ensuring accurate laboratory results.

A (Gray stopper) YOUR ANSWER

The gray stopper tube is typically used for glucose testing and contains additives like sodium fluoride. It is drawn later in the order of draw after the red-speckled tube to prevent any contamination that could affect glucose levels during testing.

B (Green-speckled) YOUR ANSWER

The green-speckled tube contains heparin and is used for various tests, including chemistry panels. It is also drawn after the red-speckled tube, as drawing it first could introduce heparin into the sample and interfere with subsequent tests requiring serum.

C (Lavender) YOUR ANSWER

The lavender tube is primarily used for complete blood counts and contains EDTA as an anticoagulant. It is drawn after the red-speckled tube to avoid contamination and ensure the integrity of the sample for hematological analysis.

D (Red-speckled) CORRECT

The red-speckled tube is the first in the standard order of draw because it is used for serum tests and does not contain any additives that could interfere with the subsequent tests. Drawing it first prevents contamination from additives found in other tubes.

Conclusion

The red-speckled tube is the first tube drawn in the standard order of draw, ensuring purity of the serum samples collected for testing. Following this order minimizes the risk of contamination from additives in subsequent tubes, thus preserving the accuracy of laboratory results for the tests performed. Understanding this order is crucial for phlebotomists and laboratory professionals to ensure proper specimen handling.

Which tube is drawn FIRST in standard order of draw?

Red-speckled tube is drawn FIRST in standard order of draw.

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