Phlebotomy Test Blood Collection Equipment and Supplies

Question 1

What is the standard needle gauge most commonly used for routine adult venipuncture?

Accepted Answer

21 gauge

Answer

18 gauge

Answer

25 gauge

Answer

23 gauge

Question 2

Which evacuated tube color contains EDTA as its anticoagulant and is most commonly used for CBC testing?

Accepted Answer

Lavender/purple

Answer

Light blue

Answer

Green

Answer

Red

Question 3

What is the primary purpose of applying a tourniquet during venipuncture?

Accepted Answer

To distend veins by restricting venous blood flow

Answer

To sterilize the puncture site

Answer

To prevent arterial blood from entering the tube

Answer

To reduce patient movement

Question 4

What is the maximum recommended time a tourniquet should remain applied during venipuncture?

Accepted Answer

1 minute

Answer

30 seconds

Answer

2 minutes

Answer

5 minutes

Question 5

Which antiseptic is most commonly used to cleanse the venipuncture site for routine blood collection?

Accepted Answer

70% isopropyl alcohol

Answer

Betadine (povidone-iodine)

Answer

Hydrogen peroxide

Answer

Chlorhexidine gluconate

Question 6

What gauge needle is most commonly used with a butterfly (winged infusion) set for small or fragile hand veins?

Accepted Answer

23 gauge

Answer

18 gauge

Answer

19 gauge

Answer

21 gauge

Question 7

What is the primary advantage of the evacuated tube (Vacutainer) system over a syringe for routine venipuncture?

Accepted Answer

It allows multiple tube collection from one venipuncture using pre-vacuumed tubes

Answer

It eliminates the need for a tourniquet

Answer

It only requires a 25-gauge needle

Answer

It does not require antiseptic site preparation