6. Which of the following specimens has a phlebotomist appropriately prepared for transport?
Answer: D
A green-top tube for ammonia testing that is being shipped in an icy water mixture
A green-top tube for ammonia testing is appropriately prepared for transport when it is shipped in an icy water mixture, as this helps to preserve the stability of ammonia levels in the specimen.
A) A red-top tube that is being shipped after clotting for 15 min and being centrifuged
This option is incorrect because while the red-top tube may be prepared correctly by allowing it to clot and centrifuging, it is not specifically suitable for ammonia testing. Ammonia levels can be affected by temperature, and this option does not mention any cooling method to preserve the sample.
B) A tube containing serum that is being shipped after separation from a lavender-top tube
This option is not appropriate because it does not specify the preservation conditions necessary for ammonia testing. Although serum may be separated correctly, without proper cooling, the ammonia levels could degrade, making the specimen unsuitable for accurate analysis.
C) A tiger-top tube for bilirubin testing that is being shipped in a clear biohazard bag
This option is incorrect as it pertains to bilirubin testing, not ammonia testing. While the specimen might be appropriately contained in a biohazard bag, there is no mention of temperature control, which is crucial for the stability of ammonia levels.
D) A green-top tube for ammonia testing that is being shipped in an icy water mixture
This is the correct answer because the icy water mixture is essential for maintaining the integrity of the ammonia levels during transport. Ammonia is sensitive to temperature changes, and shipping the specimen chilled helps prevent degradation.
Conclusion
The correct answer, a green-top tube for ammonia testing shipped in an icy water mixture, is crucial for preserving the sample's integrity. The other options either do not pertain to ammonia testing or fail to provide the necessary temperature control required for accurate results. Thus, only option D meets the proper criteria for transporting an ammonia specimen.