American Medical Certification Association (AMCA) Phlebotomy Practice Exam

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Which tube would be used for a Thyroid Panel?

Light Green
Tiger Top
Lavender
Yellow

The correct answer is: Tiger Top

The Tiger Top tube is the appropriate choice for a Thyroid Panel because it contains a gel separator that aids in the separation of serum from the blood cells after centrifugation. This is essential for accurate testing in many laboratory analyses, including hormone levels such as those found in thyroid panels. The separation allows for a clear serum sample, which is crucial for obtaining reliable results when measuring thyroid hormones like TSH, T3, and T4. In contrast, the Light Green tube typically contains lithium heparin and is more suited for plasma rather than serum tests. The Lavender tube is used for hematology tests and generally contains EDTA, which is not ideal for a thyroid panel due to its anticoagulant properties. The Yellow tube, often used for culture tests or specific types of blood tests, does not provide the appropriate environment for thyroid hormone testing. Thus, the Tiger Top tube stands out as the best option for ensuring accurate results in a Thyroid Panel.