Medical Laboratory SciencePhlebotomy
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Phlebotomy and Blood Collection Quiz

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#1

Which of the following veins is commonly used for venipuncture?

Cephalic vein
Explanation

Commonly accessible for blood draw.

#2

What is the purpose of using an alcohol swab before venipuncture?

To sterilize the skin
Explanation

Prevents introduction of pathogens.

#3

Which anticoagulant is commonly used for blood collection in a lavender-top tube?

EDTA
Explanation

Prevents blood clotting.

#4

What is the recommended angle for inserting the needle during routine venipuncture?

30-45 degrees
Explanation

Optimal for successful entry into the vein.

#5

Which vein is typically used for venipuncture in pediatric patients?

Brachial vein
Explanation

Accessible and less prone to rolling.

#6

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

To dilate the veins
Explanation

Facilitates easier vein access.

#7

Which gauge of needle is typically used for routine venipuncture in adults?

22 gauge
Explanation

Balances flow rate and patient comfort.

#8

Which of the following is a common complication of venipuncture?

Infection
Explanation

Introduction of pathogens into bloodstream.

#9

Which of the following is a complication of phlebotomy that may occur if the tourniquet is left on too long?

Petechiae
Explanation

Caused by blood vessels rupturing.

#10

Which of the following tests requires a fasting specimen?

Glucose
Explanation

Minimizes influence of recent food intake.

#11

What is the primary purpose of using a butterfly needle during venipuncture?

To access difficult veins
Explanation

Enhances precision and reduces discomfort.

#12

What is the maximum time recommended for the tourniquet to remain on the patient's arm during venipuncture?

2 minutes
Explanation

Prevents vascular damage.

#13

Which of the following tubes is typically used for coagulation studies?

Light blue-top tube
Explanation

Contains anticoagulant to preserve sample.

#14

Which anticoagulant is commonly used in a green-top tube for plasma determination?

Heparin
Explanation

Prevents blood clotting.

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