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

What is the recommended order of draw when using a multi-sample needle?

Blue, green, lavender, red
Explanation

Preserves sample integrity.

#10

Which of the following tests is most commonly ordered to assess kidney function?

Creatinine
Explanation

Indicator of renal health.

#11

What is the primary function of a vacutainer tube during blood collection?

To collect blood under vacuum pressure
Explanation

Facilitates blood draw without aspiration.

#12

Which of the following veins is often chosen for venipuncture when other sites are inaccessible?

Femoral vein
Explanation

Deep and central access point.

#13

What does the acronym CBC stand for in the context of blood tests?

Complete Blood Count
Explanation

Quantifies various blood components.

#14

Which of the following is NOT a common complication of venipuncture?

Sepsis
Explanation

Uncommon consequence.

#15

What is the primary purpose of gently mixing blood in a collection tube after venipuncture?

To evenly distribute anticoagulant
Explanation

Ensures sample integrity.

#16

Which of the following blood components is primarily responsible for oxygen transport?

Erythrocytes
Explanation

Contains hemoglobin for oxygen binding.

#17

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.

#18

Which of the following tests requires a fasting specimen?

Glucose
Explanation

Minimizes influence of recent food intake.

#19

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

To access difficult veins
Explanation

Enhances precision and reduces discomfort.

#20

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

2 minutes
Explanation

Prevents vascular damage.

#21

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

Light blue-top tube
Explanation

Contains anticoagulant to preserve sample.

#22

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

Heparin
Explanation

Prevents blood clotting.

#23

What is the recommended site for capillary blood collection in infants?

Heel
Explanation

Rich capillary bed and less painful.

#24

Which of the following additives is commonly found in a gray-top tube?

Potassium oxalate
Explanation

Preserves blood for glucose testing.

#25

What is the primary purpose of warming the site prior to capillary puncture?

To enhance blood flow
Explanation

Facilitates sample collection.

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