Certified Phlebotomy Technician Exam Phlebotomy Fundamentals 2

Question 1

Which gauge needle is most commonly used for routine venipuncture in adults?

Accepted Answer

21 gauge

Answer

A 21-gauge needle is the standard for routine adult venipuncture, balancing adequate flow with patient comfort.

Question 2

What is the proper angle of needle insertion for venipuncture?

Accepted Answer

15–30 degrees

Answer

A 15–30 degree angle allows the needle to enter the vein lumen without passing through the posterior wall.

Question 3

Which tube is drawn FIRST in the recommended order of draw?

Accepted Answer

Blood culture bottles

Answer

Blood culture bottles are drawn first to minimize contamination risk before any additives are introduced.

Question 4

A patient's arm is edematous at the antecubital fossa. What is the best action?

Accepted Answer

Select an alternate site such as the forearm or hand

Answer

Edematous tissue traps interstitial fluid that can dilute the specimen, so an alternate unaffected site must be chosen.

Question 5

What does the term 'hemoconcentration' refer to in phlebotomy?

Accepted Answer

Elevation of non-filterable blood components due to fluid shift

Answer

Hemoconcentration occurs when a tourniquet is left on too long, causing plasma to shift into tissue and concentrating cellular components.

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