AMCA Phlebotomy Practice Exam 2025 – 400 Free Practice Questions to Pass the Exam

Disable ads (and more) with a premium pass for a one time $4.99 payment

Question: 1 / 135

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

Red Tube Top

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.

Get further explanation with Examzify DeepDiveBeta

Light Blue Tube Top

Gold Tube Top

Next

Report this question

Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy