CPCT Phlebotomy and Specimen Collection

Question 1

Which vein is most commonly used for venipuncture in adults?

Accepted Answer

Median cubital vein

Answer

The median cubital vein is preferred for venipuncture because it is large, well-anchored, and poses the least risk of injury to surrounding structures.

Question 2

What does the acronym 'SST' stand for in phlebotomy?

Accepted Answer

Serum Separator Tube

Answer

SST stands for Serum Separator Tube, which contains a gel that separates serum from blood cells after centrifugation.

Question 3

What is the correct angle for needle insertion during venipuncture?

Accepted Answer

15 to 30 degrees

Answer

A 15 to 30 degree angle is recommended for venipuncture to allow the needle to enter the vein without passing through it.

Question 4

Which color-coded tube top is used to collect blood for a complete blood count (CBC)?

Accepted Answer

Lavender (purple)

Answer

Lavender-top tubes contain EDTA, an anticoagulant that preserves cellular components, making them ideal for CBC testing.

Question 5

How long should a tourniquet remain applied during venipuncture?

Accepted Answer

No longer than 1 minute

Answer

A tourniquet should not remain in place for more than 1 minute to prevent hemoconcentration and falsely elevated lab values.

CPCT - Certified Patient Care Technicians Practice Test

CPCT - Certified Patient Care Technicians Practice Test

CPCT Phlebotomy and Specimen Collection