Phlebotomy Technician Certification Exam Review and Study Guide |
Venipuncture Techniques, Capillary Collection, Order of Draw, Specimen
Handling and Processing, Infection Control, Patient Identification, Safety
Procedures, Laboratory Terminology and CPT Practice Questions and
Answers | Updated 2026 Phlebotomy Test Prep
Question 1:
What is the primary responsibility of a phlebotomist?
• A) Administering medications
• B) Collecting blood samples
• C) Performing lab tests
• D) Analyzing patient health records
Correct Option: B) Collecting blood samples
Rationale:
The primary role of a phlebotomist is to collect blood samples from patients for various
tests, donations, or transfusions. This requires knowledge of anatomy, safety
procedures, and proper techniques to ensure samples are collected without causing
harm or discomfort to the patient. While other options involve healthcare tasks, they fall
outside the phlebotomist's main responsibilities.
Question 2:
What is the most appropriate site for venipuncture in adults?
• A) Radial artery
• B) Dorsal hand vein
• C) Median cubital vein
• D) Femoral vein
Correct Option: C) Median cubital vein
Rationale:
The median cubital vein is typically the largest and most visible vein in the antecubital
fossa (the area in front of the elbow), making it the most suitable site for venipuncture. It
has a lower risk of complications and is less likely to result in nerve damage compared
to other sites. The radial artery and femoral vein are not standard sites for routine blood
collection.
,Question 3:
Which of the following is the correct order of draw for blood collection tubes?
• A) Lavender, Red, Green
• B) Green, Blue, Red
• C) Blue, Red, Lavender
• D) Red, Green, Lavender
Correct Option: C) Blue, Red, Lavender
Rationale:
The order of draw is crucial to avoid cross-contamination of additives in the tubes. The
recommended order starts with blood culture or light blue top tubes (for coagulation
studies), followed by red top tubes (which contain no additives), and then lavender top
tubes (which contain EDTA as an anticoagulant). Following the correct order ensures
accurate test results.
Question 4:
What is a common complication that can occur during venipuncture?
• A) Hyperglycemia
• B) Hematoma
• C) Hypotension
• D) Infection
Correct Option: B) Hematoma
Rationale:
A hematoma is a local collection of blood outside of blood vessels, often resulting from
venipuncture. It can occur if the needle goes through the vein or if pressure is not
applied after needle withdrawal. While infection is a potential risk, it is less common
with proper technique and hygiene. Hyperglycemia and hypotension are unrelated to
the immediate complications of phlebotomy.
Question 5:
Which additive is found in a tube with a green top cap?
• A) EDTA
• B) Sodium citrate
• C) Heparin
, • D) Sodium fluoride
Correct Option: C) Heparin
Rationale:
Green top tubes contain heparin, a type of anticoagulant that prevents blood clotting
during collection. Heparin is used in various laboratory tests to evaluate blood
chemistry and can be particularly useful for plasma samples. EDTA (lavender cap) and
sodium citrate (blue cap) serve different purposes as anticoagulants, while sodium
fluoride (grey cap) is used for glucose testing.
Question 6:
What is the primary purpose of using an evacuated tube system (ETS)?
• A) To collect urine samples
• B) To ensure a sterile environment
• C) To control the volume of blood drawn
• D) To allow for faster blood flow
Correct Option: C) To control the volume of blood drawn
Rationale:
The evacuated tube system (ETS) is designed to control the volume of blood collected
through pre-measured tubes that create a vacuum. This ensures that an adequate
amount of blood is obtained for various laboratory tests while minimizing the risk of
contamination.
Question 7:
Which of the following is NOT a type of blood collection tube?
• A) Lavender Tube
• B) Red Tube
• C) Orange Tube
• D) Yellow Tube
Correct Option: C) Orange Tube
Rationale:
While color-coded tubes are used in phlebotomy for different tests, the orange tube is
commonly used for specific tests but is not typically recognized as a standard in blood
collections compared to red, lavender, and yellow tubes, which have well-defined uses.
Venipuncture Techniques, Capillary Collection, Order of Draw, Specimen
Handling and Processing, Infection Control, Patient Identification, Safety
Procedures, Laboratory Terminology and CPT Practice Questions and
Answers | Updated 2026 Phlebotomy Test Prep
Question 1:
What is the primary responsibility of a phlebotomist?
• A) Administering medications
• B) Collecting blood samples
• C) Performing lab tests
• D) Analyzing patient health records
Correct Option: B) Collecting blood samples
Rationale:
The primary role of a phlebotomist is to collect blood samples from patients for various
tests, donations, or transfusions. This requires knowledge of anatomy, safety
procedures, and proper techniques to ensure samples are collected without causing
harm or discomfort to the patient. While other options involve healthcare tasks, they fall
outside the phlebotomist's main responsibilities.
Question 2:
What is the most appropriate site for venipuncture in adults?
• A) Radial artery
• B) Dorsal hand vein
• C) Median cubital vein
• D) Femoral vein
Correct Option: C) Median cubital vein
Rationale:
The median cubital vein is typically the largest and most visible vein in the antecubital
fossa (the area in front of the elbow), making it the most suitable site for venipuncture. It
has a lower risk of complications and is less likely to result in nerve damage compared
to other sites. The radial artery and femoral vein are not standard sites for routine blood
collection.
,Question 3:
Which of the following is the correct order of draw for blood collection tubes?
• A) Lavender, Red, Green
• B) Green, Blue, Red
• C) Blue, Red, Lavender
• D) Red, Green, Lavender
Correct Option: C) Blue, Red, Lavender
Rationale:
The order of draw is crucial to avoid cross-contamination of additives in the tubes. The
recommended order starts with blood culture or light blue top tubes (for coagulation
studies), followed by red top tubes (which contain no additives), and then lavender top
tubes (which contain EDTA as an anticoagulant). Following the correct order ensures
accurate test results.
Question 4:
What is a common complication that can occur during venipuncture?
• A) Hyperglycemia
• B) Hematoma
• C) Hypotension
• D) Infection
Correct Option: B) Hematoma
Rationale:
A hematoma is a local collection of blood outside of blood vessels, often resulting from
venipuncture. It can occur if the needle goes through the vein or if pressure is not
applied after needle withdrawal. While infection is a potential risk, it is less common
with proper technique and hygiene. Hyperglycemia and hypotension are unrelated to
the immediate complications of phlebotomy.
Question 5:
Which additive is found in a tube with a green top cap?
• A) EDTA
• B) Sodium citrate
• C) Heparin
, • D) Sodium fluoride
Correct Option: C) Heparin
Rationale:
Green top tubes contain heparin, a type of anticoagulant that prevents blood clotting
during collection. Heparin is used in various laboratory tests to evaluate blood
chemistry and can be particularly useful for plasma samples. EDTA (lavender cap) and
sodium citrate (blue cap) serve different purposes as anticoagulants, while sodium
fluoride (grey cap) is used for glucose testing.
Question 6:
What is the primary purpose of using an evacuated tube system (ETS)?
• A) To collect urine samples
• B) To ensure a sterile environment
• C) To control the volume of blood drawn
• D) To allow for faster blood flow
Correct Option: C) To control the volume of blood drawn
Rationale:
The evacuated tube system (ETS) is designed to control the volume of blood collected
through pre-measured tubes that create a vacuum. This ensures that an adequate
amount of blood is obtained for various laboratory tests while minimizing the risk of
contamination.
Question 7:
Which of the following is NOT a type of blood collection tube?
• A) Lavender Tube
• B) Red Tube
• C) Orange Tube
• D) Yellow Tube
Correct Option: C) Orange Tube
Rationale:
While color-coded tubes are used in phlebotomy for different tests, the orange tube is
commonly used for specific tests but is not typically recognized as a standard in blood
collections compared to red, lavender, and yellow tubes, which have well-defined uses.
