American Medical Certification Association (AMCA) Phlebotomy Practice Exam

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Prepare for the AMCA Phlebotomy Test. Use flashcards and multiple choice questions, each with hints and explanations. Ace the exam and become a certified phlebotomy technician!

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An Erythrocyte Sedimentation Rate (ESR) test is collected in which tube?

Red Tube Top
Lavender Tube Top
Light Blue Tube Top
Gold Tube Top

The correct answer is: Lavender Tube Top

The Erythrocyte Sedimentation Rate (ESR) test is collected in a tube with a lavender top because this tube typically contains EDTA (ethylenediaminetetraacetic acid), an anticoagulant that prevents the blood from clotting. The presence of EDTA is crucial for the ESR test, as it measures how quickly red blood cells settle at the bottom of a test tube over a specified period. This settling is influenced by factors such as plasma proteins and is utilized to detect inflammation and autoimmune disorders. Using a tube without an appropriate anticoagulant or with a different additive could lead to inaccurate results or affect the test's efficacy. Therefore, the lavender tube is specifically designed for tests that require whole blood or are sensitive to the effects of clotting. This makes it the correct choice for the ESR test.