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Principles and Practices of Phlebotomy Quiz

#1

Which vein is commonly used for venipuncture?

Cephalic vein
Explanation

It is easily accessible and commonly used for venipuncture.

#2

What is the purpose of using a tourniquet during venipuncture?

To increase blood flow and make veins more visible
Explanation

It helps in increasing blood flow and making veins easier to locate.

#3

What is the primary function of a phlebotomist?

To draw blood samples from patients
Explanation

Their primary role is to safely and accurately collect blood samples.

#4

What is the most common complication of venipuncture?

Hematoma
Explanation

It occurs due to blood leakage into surrounding tissues during or after venipuncture.

#5

What is the term for the process of removing blood from a vein for diagnostic purposes?

Phlebotomy
Explanation

It is the medical procedure of drawing blood for diagnostic testing or medical treatment.

#6

What is the term for the swelling of tissues caused by blood leaking from a punctured vein?

Hematoma
Explanation

It occurs when blood collects outside of the blood vessels due to vascular injury.

#7

Which of the following tubes is used for collecting blood samples for a complete blood count (CBC)?

Lavender-top tube
Explanation

It contains an anticoagulant and is used for collecting blood samples for CBC.

#8

What is the correct order of draw for multiple blood samples?

Lavender-top tubes, green-top tubes, red-top tubes
Explanation

It ensures accurate test results by preventing cross-contamination of additives.

#9

What is the purpose of palpating a vein before venipuncture?

To assess vein size and location
Explanation

It helps in determining the suitability of the vein for venipuncture.

#10

Which of the following anticoagulants is commonly used in blood collection tubes?

Heparin
Explanation

It prevents blood clotting and is commonly used in blood collection tubes.

#11

Which of the following veins is preferred for venipuncture in pediatric patients?

Dorsal venous network
Explanation

It is preferred in pediatric patients due to its accessibility and reduced risk of injury.

#12

Which of the following is NOT a step in the correct venipuncture procedure?

Insert the needle at a 90-degree angle
Explanation

The needle should be inserted at a shallower angle to avoid puncturing the vein through-and-through.

#13

Which of the following is NOT a complication of phlebotomy?

Hyperglycemia
Explanation

Hyperglycemia is a metabolic condition and not a complication of phlebotomy.

#14

What is the maximum time limit for a tourniquet to be applied during venipuncture?

3 minutes
Explanation

It helps prevent hemoconcentration and should not be applied for longer durations.

#15

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

90 degrees
Explanation

It ensures proper entry into the vein and reduces the risk of vein injury or hematoma formation.

#16

Which organization is responsible for establishing standards and guidelines for phlebotomy practices in the United States?

Clinical and Laboratory Standards Institute (CLSI)
Explanation

CLSI develops standards to ensure quality and safety in laboratory testing and procedures.

#17

Which of the following is a potential complication of using a butterfly needle for venipuncture?

Infiltration
Explanation

It occurs when fluid leaks into surrounding tissue instead of entering the vein.

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