Phlebotomy Test National Center for Competency Testing 3

Question 1

Which tube color is used for collecting specimens requiring EDTA as an anticoagulant?

Accepted Answer

Lavender

Answer

Lavender (purple) top tubes contain EDTA and are used for hematology tests such as a complete blood count (CBC).

Question 2

What is the primary purpose of inverting evacuated tubes after collection?

Accepted Answer

To mix the blood with the tube's additive

Answer

Gentle inversion mixes blood with the additive (anticoagulant or clot activator) to ensure proper specimen preparation.

Question 3

A patient is identified as a 'difficult stick.' Which site is an acceptable alternative to the antecubital fossa?

Accepted Answer

Hand or wrist veins

Answer

Hand or wrist veins are an acceptable alternative when antecubital veins are inaccessible; ankle veins require physician order.

Question 4

Which condition requires a phlebotomist to use a smaller gauge needle and gentle aspiration?

Accepted Answer

Dehydration with collapsed veins

Answer

Dehydrated patients often have fragile, collapsed veins that require a smaller gauge needle and gentle suction to avoid vein collapse.

Question 5

Under NCCT standards, how should a phlebotomist handle a needlestick injury?

Accepted Answer

Squeeze the wound, wash thoroughly, and report immediately to a supervisor

Answer

NCCT and OSHA protocols require immediately squeezing the wound, washing with soap and water, and reporting to a supervisor for follow-up care.

Phlebotomy Practice Test