CCMA Phlebotomy and Specimen Collection 2

Question 1

Which tube color is used when collecting a sample for a complete blood count (CBC)?

Accepted Answer

Lavender/purple top (EDTA)

Answer

The lavender/purple top tube contains EDTA (ethylenediaminetetraacetic acid), which preserves blood cell morphology and is required for CBC testing.

Question 2

What is the purpose of releasing the tourniquet before withdrawing the needle during venipuncture?

Accepted Answer

To prevent a hematoma from forming at the puncture site

Answer

Releasing the tourniquet before withdrawing the needle prevents blood from continuing to flow under pressure into surrounding tissues, which would cause a hematoma.

Question 3

Which of the following veins is most commonly used for routine venipuncture?

Accepted Answer

Median cubital vein

Answer

The median cubital vein in the antecubital fossa is the preferred site for venipuncture due to its size, stability, and accessibility.

Question 4

A fasting blood glucose specimen must be collected after the patient has fasted for at least:

Accepted Answer

8 hours

Answer

A fasting blood glucose requires a minimum 8-hour fast (no food or caloric beverages) to ensure baseline glucose levels unaffected by recent food intake.

Question 5

What does 'hemolysis' mean in the context of blood specimen collection?

Accepted Answer

Destruction of red blood cells releasing intracellular contents

Answer

Hemolysis is the rupture or destruction of red blood cells, releasing their contents (especially potassium and hemoglobin) into the serum, which can interfere with many lab tests.

CCMA - Certified Clinical Medical Assistant Practice Test

CCMA - Certified Clinical Medical Assistant Practice Test

CCMA Phlebotomy and Specimen Collection 2