Coagulation And Legal Issues

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  • 1/8 Questions

    When blood is circulating in the body, the liquid that carries the cells is:

    • Serum
    • Saline
    • Plasma
    • Water
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About This Quiz

This quiz assesses knowledge on blood coagulation and related legal issues, focusing on the order of draw, components of primary hemostasis, and consent for blood collection in minors. It is designed for healthcare professionals and students in medical laboratory science.

Coagulation And Legal Issues - Quiz

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  • 2. 

    What tubes are necessary for drawing a CBC and PT?

    • One blue-top tube completely filled

    • One yellow (SPS) tube completely filled

    • One lavender tube completely filled

    • A and c

    • A and b

    Correct Answer
    A. A and c
    Explanation
    To perform a Complete Blood Count (CBC) and Prothrombin Time (PT), the necessary tubes are a blue-top tube and a lavender tube, both completely filled. The blue-top tube is used for coagulation studies, while the lavender tube contains an anticoagulant to prevent blood clotting and is used for hematological tests, including CBC. Therefore, options "a and c" are the correct choices as they include the necessary tubes for both tests.

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  • 3. 

    What is the proper order of draw? Note: All tubes are plastic with clot activator.

    • Blue, lavender, and green

    • Yellow (SPS), green, lavender, and blue

    • Blue, green, and lavender

    • Yellow (SPS), blue, green, and lavender

    Correct Answer
    A. Yellow (SPS), blue, green, and lavender
    Explanation
    The proper order of draw for tubes with clot activator is yellow (SPS), blue, green, and lavender. This is because the yellow tube with SPS (sodium polyanethol sulfonate) is used for blood culture collections to prevent bacterial contamination. The blue tube is used for coagulation studies, the green tube is used for chemistry tests, and the lavender tube is used for hematology tests. Therefore, the correct order ensures accurate and uncontaminated blood samples for each type of test.

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  • 4. 

    Who can give consent to have blood drawn from a 10 year old child?

    • Physician

    • Legal guardian

    • Parent

    • B and c

    • A, b, and c

    Correct Answer
    A. B and c
    Explanation
    A 10-year-old child cannot give consent for a medical procedure like having blood drawn. Therefore, the legal guardian and parent are the ones who can give consent on behalf of the child. Both the legal guardian and the parent have the authority to make decisions regarding the child's healthcare, including giving consent for medical procedures.

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  • 5. 

    Which of the following would most likely not cause a hematoma? 

    • The needle penetrates all the way through the vein

    • The needle is only partly inserted into the vein

    • The needle is removed after the tourniquet is released

    • Excessive blind probing is used to locate the vein

    Correct Answer
    A. The needle is removed after the tourniquet is released
    Explanation
    Removing the needle after the tourniquet is released would not likely cause a hematoma because the tourniquet helps to restrict blood flow and minimize bleeding. Hematomas occur when blood leaks out of a damaged blood vessel and collects in the surrounding tissue. In the given options, the other three scenarios involve potential damage to the vein, such as penetration all the way through, partial insertion, or excessive blind probing, which could lead to a hematoma.

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  • 6. 

    When drawing a blue-top tube, which of the following is correct?

    • Fill tube to line or vacuum draw.

    • A ratio of 4.5 mL whole blood to 0.5 mL sodium citrate anticoagulant is required in each tube.

    • A ratio of 1.0 mL sodium citrate to 9.0 mL whole blood is required in each tube.

    • A and b are correct

    • A, b, and c are correct

    Correct Answer
    A. A, b, and c are correct
    Explanation
    When drawing a blue-top tube, it is correct to fill the tube to the line or use a vacuum draw. Additionally, a ratio of 4.5 mL of whole blood to 0.5 mL of sodium citrate anticoagulant is required in each tube. Lastly, a ratio of 1.0 mL of sodium citrate to 9.0 mL of whole blood is also required in each tube. Therefore, options a, b, and c are all correct statements.

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  • 7. 

    Primary hemostasis involves the following steps in the following order.

    • Platelet aggregation, vasoconstriction, platelet adhesion, and platelet plug formation

    • Vasoconstriction, platelet aggregation, platelet adhesion, and platelet plug formation

    • Platelet aggregation, platelet adhesion, vasoconstriction, and platelet plug formation

    • Vasoconstriction, platelet adhesion, platelet aggregation, and platelet plug formation

    Correct Answer
    A. Vasoconstriction, platelet adhesion, platelet aggregation, and platelet plug formation
    Explanation
    Primary hemostasis involves the initial response to blood vessel injury, which includes vasoconstriction to reduce blood flow, followed by platelet adhesion to the damaged vessel wall. Platelet aggregation then occurs, where platelets clump together to form a platelet plug. This plug formation helps to stop bleeding and initiate the clotting process. Therefore, the correct order of steps in primary hemostasis is vasoconstriction, platelet adhesion, platelet aggregation, and platelet plug formation.

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  • 8. 

    Who can give consent and assume liability to have a combative 10 year old child restrained while his or her blod is drawn by a phlebotomist?

    • Parent

    • Physician

    • No one

    • Legal guardian

    • A and d

    Correct Answer
    A. No one
    Explanation
    No one can give consent and assume liability to have a combative 10-year-old child restrained while his or her blood is drawn by a phlebotomist. This is because it is not ethically or legally permissible to force a child to undergo a medical procedure against their will, especially if they are combative. Consent and liability can only be assumed by individuals who have legal authority over the child, such as parents, physicians, or legal guardians. However, in this case, none of these options are suitable as the child is not giving consent and is combative. Therefore, the correct answer is "no one".

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  • Current Version
  • Mar 10, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • Jun 03, 2010
    Quiz Created by
    ALEaton
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