HOSA PHLEBOTOMY EXAM A, B, C AND STUDY GUIDE EXAM LATEST VERSION QUESTIONS AND CORRECT
SOLUTIONS JUST RELEASED THIS YEAR
Core Domains:
Venipuncture Techniques and Procedures
Capillary Puncture and Dermal Puncture
Blood Collection Equipment and Supplies
Order of Draw and Additive Cross-Contamination
Specimen Handling, Processing, and Transport
Patient Identification and Safety Protocols
Anatomy and Physiology of the Circulatory System
Infection Control and Standard Precautions
Complications and Troubleshooting in Phlebotomy
Legal, Ethical, and Professional Standards
Introduction
This comprehensive examination is designed to assess the knowledge and clinical skills required for certification in
phlebotomy. The assessment covers essential topics including proper venipuncture and capillary puncture
techniques, the correct order of draw, identification and handling of various blood collection tubes and additives,
patient safety protocols, and the prevention of pre-analytical errors. Students will encounter multiple-choice
questions that test theoretical knowledge and practical application through real-world scenarios. Emphasis is
placed on critical thinking, decision-making, and the ability to recognize and respond to complications such as
,hematomas, hemolysis, and patient reactions. This exam prepares candidates for the professional responsibilities
and high standards expected in clinical laboratory practice.
SECTION ONE: QUESTIONS 1–100
Question 1
What is the first step a phlebotomist should take when performing a venipuncture?
A. Palpate the vein for depth and size
B. Apply the tourniquet
C. Confirm the patient's identity using two identifiers
D. Cleanse the site with alcohol
🟢 C. Confirm the patient's identity using two identifiers
🔴 RATIONALE: Confirming the patient's identity using two unique identifiers, such as name and date of birth, is
the critical first step. This ensures the correct patient is being tested, preventing misidentification errors, which
are a primary safety concern.
Question 2
Which of the following tubes is used for hematology studies such as a Complete Blood Count (CBC)?
,A. Light blue top tube
B. Lavender top tube
C. Green top tube
D. Red top tube
🟢 B. Lavender top tube
🔴 RATIONALE: The lavender top tube contains EDTA (ethylenediaminetetraacetic acid), which acts as an
anticoagulant by binding calcium. This preservative is essential for hematology tests like CBC, as it preserves the
morphology of blood cells.
Question 3
What additive is found in a light blue top tube?
A. EDTA
B. Sodium citrate
C. Heparin
D. Sodium fluoride
🟢 B. Sodium citrate
🔴 RATIONALE: Light blue top tubes contain sodium citrate, which is a reversible anticoagulant that binds
calcium to prevent clotting. They are specifically used for coagulation studies like PT and PTT because they
preserve the clotting factors.
, Question 4
What is the correct order of draw for a standard venipuncture using a vacuum tube system?
A. Light blue, red, green, lavender, gray
B. Red, light blue, green, lavender, gray
C. Lavender, green, red, light blue, gray
D. Gray, lavender, green, red, light blue
🟢 A. Light blue, red, green, lavender, gray
🔴 RATIONALE: The correct order of draw is: blood culture bottles (if applicable), light blue (citrate), red (no
additive/clot activator), green (heparin), lavender (EDTA), and gray (sodium fluoride). This sequence prevents
carryover of additives that can falsely affect test results.
Question 5
A phlebotomist is preparing to collect a blood specimen for a coagulation study. Which tube should be filled to
its fill line?
A. Red top tube
B. Lavender top tube
C. Light blue top tube
D. Green top tube
SOLUTIONS JUST RELEASED THIS YEAR
Core Domains:
Venipuncture Techniques and Procedures
Capillary Puncture and Dermal Puncture
Blood Collection Equipment and Supplies
Order of Draw and Additive Cross-Contamination
Specimen Handling, Processing, and Transport
Patient Identification and Safety Protocols
Anatomy and Physiology of the Circulatory System
Infection Control and Standard Precautions
Complications and Troubleshooting in Phlebotomy
Legal, Ethical, and Professional Standards
Introduction
This comprehensive examination is designed to assess the knowledge and clinical skills required for certification in
phlebotomy. The assessment covers essential topics including proper venipuncture and capillary puncture
techniques, the correct order of draw, identification and handling of various blood collection tubes and additives,
patient safety protocols, and the prevention of pre-analytical errors. Students will encounter multiple-choice
questions that test theoretical knowledge and practical application through real-world scenarios. Emphasis is
placed on critical thinking, decision-making, and the ability to recognize and respond to complications such as
,hematomas, hemolysis, and patient reactions. This exam prepares candidates for the professional responsibilities
and high standards expected in clinical laboratory practice.
SECTION ONE: QUESTIONS 1–100
Question 1
What is the first step a phlebotomist should take when performing a venipuncture?
A. Palpate the vein for depth and size
B. Apply the tourniquet
C. Confirm the patient's identity using two identifiers
D. Cleanse the site with alcohol
🟢 C. Confirm the patient's identity using two identifiers
🔴 RATIONALE: Confirming the patient's identity using two unique identifiers, such as name and date of birth, is
the critical first step. This ensures the correct patient is being tested, preventing misidentification errors, which
are a primary safety concern.
Question 2
Which of the following tubes is used for hematology studies such as a Complete Blood Count (CBC)?
,A. Light blue top tube
B. Lavender top tube
C. Green top tube
D. Red top tube
🟢 B. Lavender top tube
🔴 RATIONALE: The lavender top tube contains EDTA (ethylenediaminetetraacetic acid), which acts as an
anticoagulant by binding calcium. This preservative is essential for hematology tests like CBC, as it preserves the
morphology of blood cells.
Question 3
What additive is found in a light blue top tube?
A. EDTA
B. Sodium citrate
C. Heparin
D. Sodium fluoride
🟢 B. Sodium citrate
🔴 RATIONALE: Light blue top tubes contain sodium citrate, which is a reversible anticoagulant that binds
calcium to prevent clotting. They are specifically used for coagulation studies like PT and PTT because they
preserve the clotting factors.
, Question 4
What is the correct order of draw for a standard venipuncture using a vacuum tube system?
A. Light blue, red, green, lavender, gray
B. Red, light blue, green, lavender, gray
C. Lavender, green, red, light blue, gray
D. Gray, lavender, green, red, light blue
🟢 A. Light blue, red, green, lavender, gray
🔴 RATIONALE: The correct order of draw is: blood culture bottles (if applicable), light blue (citrate), red (no
additive/clot activator), green (heparin), lavender (EDTA), and gray (sodium fluoride). This sequence prevents
carryover of additives that can falsely affect test results.
Question 5
A phlebotomist is preparing to collect a blood specimen for a coagulation study. Which tube should be filled to
its fill line?
A. Red top tube
B. Lavender top tube
C. Light blue top tube
D. Green top tube
