Certified Phlebotomy Technician Exam Equipment and Supplies 2

Question 1

Which tube should be collected first when using the correct order of draw with an ETS?

Accepted Answer

Blood culture bottles

Answer

Blood culture bottles are drawn first to minimize the risk of microbial contamination from skin flora.

Question 2

What is the function of EDTA in a lavender-top tube?

Accepted Answer

Chelates calcium to prevent coagulation

Answer

EDTA (ethylenediaminetetraacetic acid) chelates calcium ions, preventing blood from clotting and preserving cell morphology for CBC testing.

Question 3

A tourniquet should be released within how many minutes after application?

Accepted Answer

1 minute

Answer

A tourniquet must be released within 1 minute to prevent hemoconcentration and falsely elevated analyte results.

Question 4

Which of the following needle disposal containers is OSHA-approved for sharps disposal?

Accepted Answer

Puncture-resistant, leak-proof sharps container

Answer

OSHA requires puncture-resistant, leak-proof, and properly labeled sharps containers for safe disposal of needles.

Question 5

What does a green-top tube typically contain?

Accepted Answer

Heparin (lithium or sodium)

Answer

Green-top tubes contain heparin (lithium or sodium), which inhibits thrombin and is used for plasma chemistry tests.

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