NHA Phlebotomy Practice Test: Master Your Skills With This Quiz

Clinically Reviewed by Amanda Nwachukwu
Amanda Nwachukwu, Pharm(D) |
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Amanda Nwachukwu, holding a Doctorate in Pharmacy from Texas Tech University Health Sciences Center, adeptly simplifies complex medical concepts into accessible content. With clinical proficiency, she ensures optimal patient care, while her adept medical writing skills facilitate comprehension and accessibility of healthcare information.
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  • 1/185 Questions

    What is another name for winged infusion sets? 

    • Caterpillar
    • Dragonfly
    • Butterfly
    • Beetlebug
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About This Quiz

Step into the world of phlebotomy mastery with the NHA Phlebotomy Practice Test. Are you ready to take this test and test your knowledge? As you know, one of the most common ways to get a diagnosis is through phlebotomy—drawing blood to be analyzed by lab technicians. If you’re preparing for your NHA certification in this essential technique, this quiz is perfect for testing what you remember from classwork.

Every question is followed by a detailed explanation, offering a comprehensive review of each answer’s rationale. This NHA practice test allows for a holistic learning experience, helping you understand phlebotomy techniques, ethical considerations, and best practices. Ideal for students or experienced professionals, this quiz is your tool for mastering phlebotomy skills. Don’t forget to share this free practice test with others on the same certification journey!

NHA Phlebotomy Practice Test: Master Your Skills With This Quiz - Quiz

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  • 2. 

    An open wound can be a portal of entry in an infection chain.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    An open wound can be a portal of entry in an infection chain because it provides a direct pathway for microorganisms, such as bacteria or viruses, to enter the body. When the skin is broken, it creates an opportunity for pathogens to invade and cause an infection. This is why it is important to keep wounds clean and properly bandaged to prevent the entry of harmful microorganisms.

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  • 3. 

    What part of the infant is a PKU test performed on? 

    • Toe

    • Finger

    • Heel

    • Forehead

    Correct Answer
    A. Heel
    Explanation
    A PKU test, also known as a newborn screening test, is performed on the heel of an infant. This is because the heel is a convenient and accessible spot for collecting a small blood sample. The test is done to check for the presence of phenylketonuria (PKU), a genetic disorder that affects the body's ability to process an amino acid called phenylalanine. By performing the test on the heel, healthcare professionals can quickly and easily obtain the necessary blood sample to screen for PKU in newborns.

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  • 4. 

    Latex sensitivity is an allergic reaction. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Latex sensitivity refers to an allergic reaction to latex. This means that when a person with latex sensitivity comes into contact with latex, their immune system reacts and causes symptoms such as itching, redness, and swelling. Therefore, the statement "Latex sensitivity is an allergic reaction" is true.

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  • 5. 

    If a patient refuses treatment you should 

    • Restrain him

    • Call 911

    • Tell your supervisor

    • Tell them it is their life

    Correct Answer
    A. Tell your supervisor
    Explanation
    When a patient refuses treatment, it is important to inform your supervisor. This is because your supervisor needs to be aware of the situation and can provide guidance on how to handle it appropriately. They may have specific protocols or procedures in place for dealing with patients who refuse treatment. By informing your supervisor, you ensure that the refusal is documented and that the appropriate steps are taken to address the situation.

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  • 6. 

    The proper way to insert a needle is with the bevel facing ____________. 

    • Up

    • Down

    • Left

    • Right

    Correct Answer
    A. Up
    Explanation
    The proper way to insert a needle is with the bevel facing up. This ensures that the needle can easily penetrate the skin and tissue without causing excessive damage or pain. Additionally, inserting the needle with the bevel facing up allows for better control and accuracy during the procedure.

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  • 7. 

    Which of the following is a recommended safety practice for a phlebotomist during blood collection?

    • Using a larger needle gauge for faster blood flow. 

    • Reusing disposable gloves to reduce waste. 

    • Avoiding the use of safety devices on needles.

    • Properly disposing of used needles in a sharps container.

    Correct Answer
    A. Properly disposing of used needles in a sharps container.
    Explanation
    Properly disposing of used needles in a sharps container is a critical safety practice. This prevents needlestick injuries, reduces the risk of contamination, and ensures safe disposal of biohazardous materials. Always follow proper disposal procedures and regulations when working with needles and sharps in healthcare settings.

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  • 8. 

    The  most important step in a routine venipuncture. 

    • Gathering equipment

    • Palpate veins

    • Identify patient

    • Tying the tourniquet

    Correct Answer
    A. Identify patient
    Explanation
    Identifying the patient is the most important step in a routine venipuncture because it ensures that the correct patient is receiving the procedure. This step helps prevent any mix-ups or errors in patient identification, which is crucial for patient safety and accurate medical records. By confirming the patient's identity, healthcare professionals can proceed with the venipuncture confidently, knowing that they are providing the correct treatment to the right individual.

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  • 9. 

    When you explain the venipuncture procedure to the patient and they agree to the test it is called _______. 

    • Getting the blood

    • Informed consent

    • Constant talking

    • HIPAA

    Correct Answer
    A. Informed consent
    Explanation
    Informed consent refers to the process of explaining a medical procedure, such as venipuncture, to a patient and obtaining their agreement to undergo the test. It ensures that patients are fully informed about the procedure, its potential risks and benefits, and any alternative options available to them. Informed consent is an important ethical and legal requirement in healthcare, as it respects the patient's autonomy and right to make decisions about their own healthcare.

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  • 10. 

    Which of the following is not considered Personal Protective Equipment (PPE)?

    • Mask

    • Goggles

    • Room dividers

    • Gloves

    Correct Answer
    A. Room dividers
    Explanation
    Room dividers are not considered personal protective equipment (PPE) because they do not provide any form of protection against hazards or contaminants. PPE is designed to protect the wearer from potential risks in their environment, such as masks for filtering out airborne particles, goggles for protecting the eyes, and gloves for protecting the hands. Room dividers, on the other hand, are typically used for creating separate spaces or dividing a room for organizational or privacy purposes, and do not offer any form of protection.

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  • 11. 

    What is the preferred antiseptic for venipuncture? 

    • Betadine

    • Iodine

    • Isopropyl alcohol

    • Jack Daniels

    Correct Answer
    A. Isopropyl alcohol
    Explanation
    Isopropyl alcohol is the preferred antiseptic for venipuncture because it effectively kills bacteria and other microorganisms on the skin, reducing the risk of infection. It is also less likely to cause skin irritation compared to iodine or betadine. Jack Daniels is not a suitable antiseptic for venipuncture as it is an alcoholic beverage and not a medical-grade antiseptic.

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  • 12. 

    What is the most important step in preventing infections? 

    • Using tissues

    • Handwashing

    • Wearing gloves

    • Isolation

    Correct Answer
    A. Handwashing
    Explanation
    Handwashing is the most important step in preventing infections because it helps to remove bacteria, viruses, and other germs from our hands. Our hands come into contact with various surfaces throughout the day, and if we touch our face or eat without washing our hands, we can easily introduce these germs into our bodies. Handwashing with soap and water for at least 20 seconds is effective in killing and removing germs, reducing the risk of infections. It is a simple and cost-effective measure that can be practiced by everyone to maintain good hygiene and prevent the spread of infections.

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  • 13. 

    Tubes may lose their vacuum due to ______________________. 

    • Manufacturing defects

    • Expired tube

    • A fine crack in the tube

    • All of the above

    Correct Answer
    A. All of the above
    Explanation
    Tubes may lose their vacuum due to various factors, including manufacturing defects, expiration, and fine cracks in the tube. These issues compromise the integrity of the vacuum seal, affecting the tube's ability to maintain proper pressure for blood collection. Healthcare professionals must carefully assess tubes for potential defects to ensure accurate and reliable sample collection in clinical settings.

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  • 14. 

    Which additive is usually in a lavender tube? 

    • Citrate

    • EDTA

    • Heparin

    • Oxalate

    Correct Answer
    A. EDTA
    Explanation
    EDTA is usually found in a lavender tube. EDTA stands for ethylenediaminetetraacetic acid and is commonly used as an anticoagulant in blood collection tubes. It works by binding to calcium ions, preventing blood clotting. The lavender tube is typically used for hematology tests, such as complete blood count (CBC) and blood cell differentials.

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  • 15. 

    In a routine blood draw the red tube is drawn before the green tube. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    In a routine blood draw, the order in which blood is drawn can vary depending on the specific laboratory's protocol and the tests being conducted. However, it's common practice to draw blood into tubes with different colored stoppers to ensure that the correct tests can be performed. For example, the red-top tube is often used for basic blood chemistry tests, while the green-top tube is used for tests that require plasma, such as certain chemistry and drug tests. Therefore, it's not unusual for the red tube to be drawn before the green tube in a routine blood draw.

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  • 16. 

    What is the preferred site for venipuncture? 

    • Thrombotic vein

    • Antecubital fossa

    • Elbow

    • Ulnar vein

    Correct Answer
    A. Antecubital fossa
    Explanation
    The preferred site for venipuncture is the antecubital fossa. This area is located in the bend of the elbow and is commonly used for venipuncture procedures because it is easily accessible and has a large network of veins. The antecubital fossa is also less likely to cause complications such as nerve damage or thrombosis compared to other sites like the ulnar vein or thrombotic vein.

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  • 17. 

     A patient in the Oncology Dept. is probably being treated for _______________.

    • Diabetes

    • Pregnancy

    • Phlebitis

    • Cancer

    Correct Answer
    A. Cancer
    Explanation
    A patient in the Oncology Dept. is probably being treated for cancer. The Oncology Dept. specializes in the diagnosis and treatment of cancer, so it is likely that a patient in this department is being treated for cancer.

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  • 18. 

    The first drop of blood in a capillary puncture is the best for analysis. 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    The statement is false because the first drop of blood in a capillary puncture is not always the best for analysis. The first drop of blood can be contaminated with tissue fluid or alcohol from the skin, which can affect the accuracy of the analysis. It is recommended to discard the first drop and collect subsequent drops for analysis.

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  • 19. 

     Which tube contains sodium citrate?

    • Light-blue

    • Red

    • Green

    • Yellow

    Correct Answer
    A. Light-blue
    Explanation
    The light-blue tube contains sodium citrate. Sodium citrate is commonly used as an anticoagulant in blood collection tubes, and the light-blue tube is specifically designed for coagulation tests, which require the blood to be collected in an anticoagulant tube.

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  • 20. 

    Microorganisms that cause diseases

    • Hereditary

    • Normal flora

    • Nonpathogens

    • Pathogenic

    Correct Answer
    A. Pathogenic
    Explanation
    Pathogenic microorganisms are those that are capable of causing diseases in humans, animals, or plants. They have the ability to invade and multiply in the host organism, leading to the development of symptoms and illness. These microorganisms can be bacteria, viruses, fungi, or parasites. In contrast, nonpathogens are microorganisms that do not cause diseases and may even have beneficial effects on the host. The term "pathogenic" is used to describe microorganisms that have the potential to harm and cause illness.

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  • 21. 

    The following were collected for a routine venipuncture.  Which item is incorrect?

    • Tubes

    • Iodine swab

    • Tourniquet

    • Safety needles

    Correct Answer
    A. Iodine swab
    Explanation
    The incorrect item for routine venipuncture is the "iodine swab." Typically, alcohol swabs are used for skin disinfection before blood collection, not iodine swabs. The other items listed—tubes, tourniquet, and safety needles—are standard equipment used in routine venipuncture procedures to collect blood samples safely and efficiently. Therefore, iodine swabs do not align with standard practice for venipuncture.

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  • 22. 

     Sodium Citrate is the additive in which tube?

    • Red

    • Gray

    • Light blue

    • Green

    Correct Answer
    A. Light blue
    Explanation
    Sodium citrate is commonly used as an anticoagulant in blood collection tubes. The light blue tube is specifically designed for coagulation testing, and it contains sodium citrate as the additive. Sodium citrate prevents blood from clotting by binding to calcium ions, which are necessary for the clotting process. This allows for accurate testing of clotting factors and other coagulation parameters. Therefore, the correct answer is light blue.

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  • 23. 

    Where is blood collected, stored and prepared for transfusions? 

    • Hematology

    • Blood Bank

    • Chemistry

    • Immunology

    Correct Answer
    A. Blood Bank
    Explanation
    Blood is collected, stored, and prepared for transfusions in a blood bank. A blood bank is a specialized facility that handles the collection, processing, and storage of blood and blood products. It ensures the safety and availability of blood for transfusions by conducting tests to determine blood type, screening for infectious diseases, and properly storing the blood products. The blood bank also prepares blood components such as red blood cells, plasma, and platelets based on specific patient needs.

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  • 24. 

    Which of the following veins in the arm are most subjected to venipuncture? 

    • Basilic

    • Median Cubital

    • Brachial

    • Cephalic

    Correct Answer
    A. Median Cubital
    Explanation
    The median cubital vein is the most commonly used vein for venipuncture in the arm. It is located in the middle of the arm and is often visible and easily accessible. It is preferred for venipuncture because it is relatively large, straight, and does not tend to move or roll during the procedure, making it easier to insert a needle and collect blood samples. The basilic, brachial, and cephalic veins are also commonly used for venipuncture, but the median cubital vein is typically the first choice.

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  • 25. 

    Which needle has the largest gauge? 

    • 16

    • 21

    • 22

    • 23

    Correct Answer
    A. 16
    Explanation
    The needle with the largest gauge is 16. Gauge refers to the size of the needle's opening, with a larger gauge indicating a larger opening. Therefore, out of the given options, the needle with a gauge of 16 has the largest opening.

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  • 26. 

    Taking aspirin is most likely going to effect a BT test. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Taking aspirin is most likely going to affect a BT test. This is because aspirin is a blood thinner and can interfere with the clotting process. A BT test measures the time it takes for blood to clot, so if someone has taken aspirin, it can prolong the clotting time and give inaccurate results. Therefore, it is true that taking aspirin is most likely going to affect a BT test.

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  • 27. 

    The hormone detected in a positive pregnancy test is 

    • ACTH

    • GH

    • HCG

    • TSH

    Correct Answer
    A. HCG
    Explanation
    The hormone detected in a positive pregnancy test is HCG (human chorionic gonadotropin). HCG is produced by the placenta during pregnancy and is responsible for maintaining the production of progesterone, which is essential for a healthy pregnancy. When a woman is pregnant, HCG levels rise rapidly, and a pregnancy test detects the presence of this hormone in the urine or blood. Therefore, a positive pregnancy test indicates the presence of HCG in the body.

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  • 28. 

    Which tube is drawn last in a standard venipuncture procedure? 

    • Blood culture tube

    • Lavender

    • Light-blue

    • Red

    Correct Answer
    A. Lavender
    Explanation
    In a standard venipuncture procedure, the lavender tube is drawn last. This is because the lavender tube is used to collect blood for a complete blood count (CBC) test, which requires an anticoagulant to prevent clotting. Drawing the lavender tube last ensures that the other tubes, such as the blood culture tube, light-blue tube, and red tube, are collected first to avoid contamination or interference with the lavender tube sample.

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  • 29. 

    Sodium Citrate tubes have what color stoppers? 

    • Light blue

    • Red

    • Lavender

    • Green

    Correct Answer
    A. Light blue
    Explanation
    Sodium Citrate is commonly used as an anticoagulant in blood collection tubes. These tubes are color-coded to indicate the type of additive present. Light blue stoppers are typically used for tubes containing sodium citrate. This color coding system helps healthcare professionals easily identify the appropriate tube for specific tests or procedures.

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  • 30. 

     A clean catch test is collected in a:

    • Red tube

    • Royal blue tube

    • Sterile cup

    • Yellow tube

    Correct Answer
    A. Sterile cup
    Explanation
    A clean catch test is collected in a sterile cup to ensure that the urine sample is not contaminated by any external factors. The sterile cup helps maintain the integrity of the sample and prevents any introduction of bacteria or other substances that could affect the test results. Using a sterile cup also allows for accurate analysis of the urine sample and helps in diagnosing any potential medical conditions.

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  • 31. 

     The order of draw for venipuncture is:  BC, blue, serum, green, EDTA, gray.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The order of draw in venipuncture is critical to avoid cross-contamination from different additives in blood collection tubes. The correct sequence, according to the Clinical and Laboratory Standards Institute (CLSI), is:
    Blood cultures (BC)
    Coagulation tube (Blue)
    Serum tubes (Serum)
    Heparin tubes (Green)
    EDTA tubes (EDTA)
    Oxalate/fluoride tubes (Gray)

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  • 32. 

     Lavender and Green tubes should all be inverted 8 times each.

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The given statement is true because inverting the tubes helps to mix the contents thoroughly. By inverting the tubes 8 times each, it ensures that the lavender and green substances are well mixed and any components that may have settled at the bottom are evenly distributed. This is important for accurate and consistent results in any experiment or analysis that involves these substances.

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  • 33. 

    There is a 9 to 1 ratio of blood to anticoagulant in a light blue tube. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    In a light blue tube, there is a 9 to 1 ratio of blood to anticoagulant. This means that for every 9 parts of blood, there is 1 part of anticoagulant. This ratio is important because it helps prevent the blood from clotting, allowing for accurate testing and analysis.

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  • 34. 

    A drug known to interfere with urine tests should be discontinued 48-72 hours prior to the test. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    The statement suggests that a drug that interferes with urine tests should be stopped 48-72 hours before the test. This implies that if the drug is not discontinued within this timeframe, it may still be present in the urine during the test and interfere with the accuracy of the results. Therefore, the statement is true.

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  • 35. 

    Using a butterfly may be necessary if the vein collapses with the evacuated tube system. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    A butterfly needle is a smaller gauge needle that is used when a patient's vein collapses or is difficult to access. It is commonly used in situations where the evacuated tube system is being used to draw blood. The evacuated tube system involves using a vacuum to draw blood into the collection tubes. If the vein collapses during this process, a butterfly needle may be necessary to successfully draw blood. Therefore, the statement that using a butterfly may be necessary if the vein collapses with the evacuated tube system is true.

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  • 36. 

    Failing to provide reasonable standards of care, causing someone to suffer an injury is known as ____________. 

    • Trauma

    • Negligence

    • Tort

    • Battery

    Correct Answer
    A. Negligence
    Explanation
    Negligence refers to the failure to provide reasonable standards of care, resulting in someone suffering an injury. It is a legal concept that holds individuals or organizations responsible for their actions or lack of actions that cause harm to others. Negligence requires proving that the defendant owed a duty of care to the plaintiff, breached that duty, and caused harm as a result. In this case, negligence is the correct answer as it accurately describes the situation where someone suffers an injury due to a failure to provide reasonable care.

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  • 37. 

    Tiny red spots on the skin caused by the rupturing of capillaries are called _____________. 

    • Phlebitis

    • Trauma

    • Petechiae

    • Pimples

    Correct Answer
    A. Petechiae
    Explanation
    Petechiae are tiny red spots on the skin that occur when capillaries rupture and cause small amounts of blood to leak into the skin. This can be caused by various factors such as injury, certain medical conditions, or certain medications. Phlebitis refers to inflammation of a vein, trauma refers to physical injury, and pimples are small, raised bumps on the skin caused by blocked hair follicles.

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  • 38. 

    Which tube is used for PTT?

    • Light blue

    • Green

    • Red

    • Gray

    Correct Answer
    A. Light blue
    Explanation
    PTT stands for Partial Thromboplastin Time, which is a blood test used to evaluate the effectiveness of the clotting system. The light blue tube is commonly used for coagulation tests, including PTT, because it contains sodium citrate as an anticoagulant. Sodium citrate prevents the blood from clotting by binding to calcium ions, allowing accurate measurement of clotting time. Therefore, the correct tube for PTT testing is the light blue tube.

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  • 39. 

    Lipemic bloodserum appears: 

    • Bluish

    • Milky

    • Purple

    • Thick

    Correct Answer
    A. Milky
    Explanation
    Lipemic blood serum appears milky due to the presence of excess lipids or fats in the serum. This can be caused by various factors such as high levels of triglycerides, cholesterol, or certain medical conditions. The milky appearance is a result of the scattering of light by the lipid particles suspended in the serum. Lipemic serum is commonly observed in individuals with conditions like hyperlipidemia or after consuming a high-fat meal. It can also be seen in certain medical tests, where the blood sample is not properly fasted before collection.

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  • 40. 

    A green top tube usually contains 

    • EDTA

    • Citrate

    • Heparin

    • Oxalate

    Correct Answer
    A. Heparin
    Explanation
    A green top tube usually contains heparin. Heparin is an anticoagulant that prevents blood from clotting by inhibiting the formation of fibrin. It is commonly used for tests that require plasma, such as blood gas analysis, as it prevents clotting and allows for accurate results. EDTA is usually found in purple top tubes, citrate in blue top tubes, and oxalate in gray top tubes.

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  • 41. 

    Where do blood cells originate? 

    • Heart

    • Lungs

    • Bone marrow

    • Capillaries

    Correct Answer
    A. Bone marrow
    Explanation
    Blood cells originate in the bone marrow. The bone marrow is a soft tissue found inside the bones, and it is responsible for producing all types of blood cells, including red blood cells, white blood cells, and platelets. These cells are essential for various functions in the body, such as carrying oxygen, fighting infections, and clotting blood. The bone marrow continuously produces and releases new blood cells into the bloodstream to maintain a healthy balance.

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  • 42. 

    Sclerosed veins feel ______________. 

    • Spongy

    • Cordlike

    • Movable

    • Square

    Correct Answer
    A. Cordlike
    Explanation
    Sclerosed veins feel cordlike because when veins become hardened or fibrotic due to conditions such as chronic venous insufficiency or varicose veins, they lose their elasticity and become thickened. This causes the veins to feel like cords or ropes under the skin.

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  • 43. 

    All patients are presumed to be infectious for ___________. 

    • Blood borne pathogens

    • TB

    • Flu

    • Common cold

    Correct Answer
    A. Blood borne pathogens
    Explanation
    All patients are presumed to be infectious for blood borne pathogens. This means that healthcare professionals must take precautions to prevent the transmission of diseases that are transmitted through blood, such as HIV, hepatitis B, and hepatitis C. This assumption is made to ensure the safety of both the healthcare workers and other patients.

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  • 44. 

    Bacteria and parasites belong to which type of hazard? 

    • Biologic

    • Chemical

    • Physical

    • Allergic

    Correct Answer
    A. Biologic
    Explanation
    Bacteria and parasites belong to the biologic type of hazard because they are living organisms that can cause harm or disease. Unlike chemical or physical hazards, which involve non-living substances or environmental factors, biologic hazards involve the presence of microorganisms that can infect and harm humans or other organisms. These hazards can include bacterial infections, parasitic infestations, and the spread of diseases.

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  • 45. 

    In a routine venipuncture the lavender tube should be drawn before the red tube. 

    • True

    • False

    Correct Answer
    A. False
    Explanation
    In a routine venipuncture, the order in which the tubes are drawn is important to ensure accurate test results. The correct order is to draw the tubes in the following sequence: first, the tubes for coagulation tests (usually light blue or green), then the tubes for other tests such as chemistry or immunology (usually red or gold), and finally the tubes for hematology tests (usually lavender or purple). Therefore, the correct answer is false, as the lavender tube should be drawn after the red tube in a routine venipuncture.

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  • 46. 

    Glycolysis occurs faster in newborns. 

    • True

    • False

    Correct Answer
    A. True
    Explanation
    Glycolysis is the process by which glucose is broken down to produce energy. It is an important metabolic pathway that occurs in all living organisms. In newborns, glycolysis occurs at a faster rate compared to adults. This is because newborns have a higher metabolic rate and energy demand due to their rapid growth and development. Additionally, newborns rely heavily on glycolysis for energy production as their oxidative phosphorylation system is not fully developed. Therefore, it can be concluded that glycolysis occurs faster in newborns.

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  • 47. 

    Which is not a reason for failure to collect blood? 

    • Tube lost vacuum

    • Bevel of the needle against the vein side

    • Needle not fully in the vein

    • Patient drank too much liquid

    Correct Answer
    A. Patient drank too much liquid
    Explanation
    The statement "patient drank too much liquid" is not typically a reason for failure to collect blood during venipuncture because excessive liquid intake does not directly affect the ability to access and draw blood from a vein. Instead, issues like vein visibility, needle placement, or equipment problems are more common causes of collection difficulties.

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  • 48. 

     Which is used for PT and PTT?

    • Red top

    • Green top

    • Light blue top

    • Gray top

    Correct Answer
    A. Light blue top
    Explanation
    The light blue top is used for PT (prothrombin time) and PTT (partial thromboplastin time) tests. These tests are used to evaluate the blood's ability to clot and determine if there are any abnormalities in the clotting process. The light blue top tube contains sodium citrate as an anticoagulant, which prevents the blood from clotting during the test. This allows for accurate measurement of the clotting factors in the blood.

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  • 49. 

    Which test must be performed on whole blood? 

    • BUN

    • CBC

    • CPK

    • PTT

    Correct Answer
    A. CBC
    Explanation
    The test that must be performed on whole blood is CBC (Complete Blood Count). This test provides important information about the different components of blood, such as red blood cells, white blood cells, and platelets. It helps in diagnosing various conditions like anemia, infections, and blood disorders. By analyzing the CBC results, healthcare professionals can assess a person's overall health and identify any abnormalities or potential underlying issues. Therefore, performing a CBC is crucial for a comprehensive evaluation of a person's blood and overall well-being.

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Amanda Nwachukwu |Pharm(D) |
Clinical Pharmacist
Amanda Nwachukwu, holding a Doctorate in Pharmacy from Texas Tech University Health Sciences Center, adeptly simplifies complex medical concepts into accessible content. With clinical proficiency, she ensures optimal patient care, while her adept medical writing skills facilitate comprehension and accessibility of healthcare information.

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  • Jul 08, 2025
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    Expert Reviewed by
    Amanda Nwachukwu
  • Nov 02, 2012
    Quiz Created by
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