Question 30

The phlebotomist completely fills the circles on the filter paper.

Proper specimen collection requires that the circles on the filter paper are completely filled to ensure accurate testing and prevent contamination. This method ensures an adequate volume of blood is available for the screening tests.

A) The phlebotomist applies blood to both sides of the filter paper.

This option is incorrect because applying blood to both sides of the filter paper can lead to contamination and improper testing. Specimen collection protocols dictate that blood should only be applied to the designated areas to maintain the integrity of the sample.

B) The phlebotomist fills the first circle with the first drop of blood.

This action is incorrect as it may not provide enough volume for testing. The first drop of blood may contain contaminants from the puncture site, and it is essential to fill the circles adequately with subsequent drops to ensure a reliable sample.

C) The phlebotomist presses the filter paper against the skin for proper contact.

This option is not appropriate as pressing the filter paper against the skin can lead to an inaccurate sample and may interfere with the blood collection. The filter paper should be positioned to allow free-flowing blood to drop onto it without contact with the skin.

D) The phlebotomist completely fills the circles on the filter paper.

Filling the circles completely is the correct practice, as it ensures that there is sufficient blood for analysis. This method aligns with established protocols for newborn screening, allowing for accurate and reliable test results.

Conclusion

In summary, option D is definitively the correct answer as it adheres to the established guidelines for specimen collection in newborn screenings. All other options either compromise the integrity of the sample or fail to meet the necessary requirements for accurate testing, thereby highlighting the importance of following proper procedures in phlebotomy.