Order Of Draw For Phlebotomy Quiz

Reviewed by Farah Naz
Farah Naz, MBBS, Medicine |
Medical Expert
Review Board Member
Farah holds a Bachelor of Medicine and Bachelor of Surgery (MBBS) from Dow University of Health Sciences. She gained valuable experience through internships in Radiology, Cardiology, and Neurosurgery, and has contributed to two research publications in medical journals. Passionate about healthcare education, Farah excels in crafting medical content, including articles, literature reviews, and e-learning courses. Leveraging her expertise, she meticulously reviews medical science quizzes, ensuring accuracy and educational value for aspiring healthcare professionals.
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Order Of Draw For Phlebotomy Quiz - Quiz

Our Order of Draw for Phlebotomy Quiz is designed to evaluate and enhance your understanding of the correct sequence in which blood collection tubes should be filled during venipuncture. This quiz is essential for anyone in the healthcare field, particularly those involved in blood sample collection and handling.

Understanding the order of draw is crucial to prevent cross-contamination between different additives used in blood tubes, which can lead to erroneous test results and diagnostics. Our quiz covers the entire spectrum, from the color-coded system of the tubes to the specific tests associated with each to ensure that you are proficient Read morein both the theory and practical aspects of phlebotomy order of draw.

Whether you are a seasoned phlebotomist, a medical student, or a healthcare professional looking to refresh your skills, this quiz offers a comprehensive review. It features a variety of questions that challenge your recall and understanding, providing explanations and feedback to help solidify your knowledge. Take our Order of Draw Quiz today and confirm your expertise in this vital medical procedure.


Order of Draw Questions and Answers

  • 1. 

    What is the additive present in the yellow sterile tube? 

    • A.

      PSTs

    • B.

      Heparin

    • C.

      ACD

    • D.

      None of the above

    Correct Answer
    C. ACD
    Explanation
    The additive present in the yellow sterile tube used for blood collection is typically ACD (acid-citrate-dextrose) solution. This solution helps prevent blood clotting by binding calcium, which is necessary for the coagulation process. Yellow tubes with ACD solution are often used for various laboratory tests, including blood cultures and DNA analysis, where the prevention of clotting is crucial.

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  • 2. 

    Choose the additive present in the light blue tube.

    • A.

      Sodium Citrate

    • B.

      PSTs

    • C.

      SSTs

    • D.

      Oxalate/fluoride

    Correct Answer
    A. Sodium Citrate
    Explanation
    The additive present in the light blue tube used for blood collection is sodium citrate. This anticoagulant prevents blood from clotting by binding calcium ions, which are necessary for the coagulation process. Light blue tubes are commonly used for coagulation tests, such as prothrombin time (PT) and activated partial thromboplastin time (APTT).

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  • 3. 

    What is the additive present in the red tube?

    • A.

      Heparin

    • B.

      EDTA

    • C.

      Blood cultures

    • D.

      None of the above

    Correct Answer
    D. None of the above
    Explanation
    The correct answer is "None of the above" because the options provided (Heparin, EDTA, and Blood cultures) are not additives commonly present in a red tube. Red tubes are typically used for collecting blood samples for serum testing, which does not require any specific additives. Therefore, none of the options listed are correct.

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  • 4. 

    What is the additive present in the light green tube?

    • A.

      PSTs

    • B.

      Blood cultures

    • C.

      Heparin

    • D.

      EDTA

    Correct Answer
    C. Heparin
    Explanation
    The light green tube, often referred to as a plasma separator tube (PST) or lithium heparin tube, contains the additive Heparin. Heparin is an anticoagulant, which means it prevents the blood from clotting by inhibiting the activity of certain clotting factors. This allows the blood to remain in a liquid state in the tube, making it suitable for various laboratory tests that require plasma, such as chemistry panels, glucose tests, and certain blood gas analyses.

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  • 5. 

    What is the additive present in the green tube?

    • A.

      PPTs

    • B.

      Oxalate/fluoride

    • C.

      EDTA

    • D.

      Heparin

    Correct Answer
    D. Heparin
    Explanation
    Heparin is the correct answer because it is an additive commonly used in green tubes for blood collection. Heparin prevents blood clotting by inhibiting the activity of thrombin and other clotting factors. It is often used for tests that require plasma, as it helps to preserve the integrity of the sample by preventing coagulation.

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  • 6. 

    What is the additive present in the lavender tube?

    • A.

      EDTA

    • B.

      Coagulation

    • C.

      SSTs

    • D.

      None of the above

    Correct Answer
    A. EDTA
    Explanation
    EDTA is the additive present in the lavender tube. EDTA stands for ethylenediaminetetraacetic acid, which is an anticoagulant commonly used in blood collection tubes to prevent clotting. It works by binding to calcium ions, which are necessary for the coagulation process. This allows the blood sample to remain in a liquid state, making it suitable for various laboratory tests such as complete blood count (CBC) and blood typing. SSTs (serum separator tubes) contain a gel that separates the serum from the clot after centrifugation, but they do not contain EDTA. Therefore, the correct answer is EDTA.

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  • 7. 

    What is the additive present in the gray tube?

    • A.

      PPTs

    • B.

      Coagulation

    • C.

      Blood cultures

    • D.

      Oxalate/fluoride

    Correct Answer
    D. Oxalate/fluoride
    Explanation
    Oxalate/fluoride is the additive present in the gray tube. Oxalate is used as an anticoagulant, preventing the blood from clotting, while fluoride is a glycolysis inhibitor that helps preserve glucose levels. This additive is commonly used for glucose testing and is also used for some toxicology tests.

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  • 8. 

    Name the additive that prevents glycolysis. 

    • A.

      Tourniquet

    • B.

      Sodium fluoride

    • C.

      Potassium oxalate

    • D.

      EDTA

    Correct Answer
    B. Sodium fluoride
    Explanation
    Sodium fluoride is the correct answer because it is an additive that prevents glycolysis. Glycolysis is a metabolic process that breaks down glucose into pyruvate, and sodium fluoride acts as an inhibitor of the enzymes involved in this process. By inhibiting glycolysis, sodium fluoride helps to preserve the integrity of samples by preventing the breakdown of glucose and the subsequent production of lactic acid. This is particularly important in medical and laboratory settings where accurate glucose measurements are required.

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  • 9. 

     In the options given below, which diameter suggests the largest needle?

    • A.

      18 gauge

    • B.

      26 gauge

    • C.

      20 gauge

    • D.

      23 gauge

    Correct Answer
    A. 18 gauge
    Explanation
    The diameter of a needle is measured by its gauge, with the gauge number inversely related to the needle's diameter. Essentially, the higher the gauge number, the thinner the needle. For instance, a 24-gauge needle is much thinner than an 18-gauge needle, which is considered large and commonly used for rapid fluid administration in medical settings. This gauge system is crucial for healthcare professionals to select the appropriate needle size for various procedures, ensuring procedural efficiency and patient comfort.

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  • 10. 

    Lavender-top tubes are used to collect _______________. 

    • A.

      Hematology tests

    • B.

      Chemistry tests

    • C.

      Immunology tests

    • D.

      None of the above

    Correct Answer
    A. Hematology tests
    Explanation
    Lavender-top tubes are used to collect blood samples for hematological tests. Hematology tests involve the study of blood cells, including red blood cells, white blood cells, and platelets. These tests help in diagnosing and monitoring conditions such as anemia, leukemia, and infections. The lavender-top tubes contain an anticoagulant called ethylenediaminetetraacetic acid (EDTA), which prevents the blood from clotting and allows for accurate analysis of the blood cells. Therefore, the correct answer is Hematology tests.

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Farah Naz |MBBS, Medicine |
Medical Expert
Farah holds a Bachelor of Medicine and Bachelor of Surgery (MBBS) from Dow University of Health Sciences. She gained valuable experience through internships in Radiology, Cardiology, and Neurosurgery, and has contributed to two research publications in medical journals. Passionate about healthcare education, Farah excels in crafting medical content, including articles, literature reviews, and e-learning courses. Leveraging her expertise, she meticulously reviews medical science quizzes, ensuring accuracy and educational value for aspiring healthcare professionals.

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  • Current Version
  • Apr 18, 2024
    Quiz Edited by
    ProProfs Editorial Team

    Expert Reviewed by
    Farah Naz
  • May 07, 2009
    Quiz Created by
    Kimberly Cook
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