ASPT Specimen Collection Techniques 2

Question 1

Which gauge needle is most commonly used for routine adult venipuncture?

Accepted Answer

21 gauge

Answer

A 21-gauge needle is the standard choice for routine adult venipuncture, balancing adequate flow with minimal vein trauma.

Question 2

When collecting blood cultures, which site should be cleansed first?

Accepted Answer

The venipuncture site

Answer

The venipuncture site skin must be disinfected before the bottle tops to prevent contamination of the blood culture.

Question 3

A phlebotomist notices a hematoma forming during venipuncture. The correct immediate action is to:

Accepted Answer

Remove the needle immediately and apply firm pressure

Answer

A forming hematoma indicates blood leaking into tissue; the needle must be removed immediately and firm pressure applied.

Question 4

What is the purpose of inverting collection tubes after blood draw?

Accepted Answer

To mix the additive with blood

Answer

Inverting tubes mixes the anticoagulant or additive evenly with the blood to ensure proper specimen integrity.

Question 5

The antecubital fossa is the preferred venipuncture site because:

Accepted Answer

It contains large, accessible veins close to the surface

Answer

The antecubital fossa houses the median cubital, cephalic, and basilic veins, which are large, superficial, and stable.

(ASPT) American Society of Phlebotomy Technicians Practice Test