Platelet Enumeration and Function Quiz
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Questions and Answers

What is the distinctive feature of platelets?

  • Circular to ellipsoidal shape (correct)
  • Linear shape
  • Presence of a nucleus
  • Star-shaped
  • Which of the following is NOT a function of platelets?

  • Blood coagulation
  • Adhesion
  • Clot retraction
  • Respiration (correct)
  • In platelet chemistry, which amino acid is commonly found?

  • Glutamine
  • Arginine
  • Lysine
  • Aspartic acid (correct)
  • What is the primary method used for determining platelet count?

    <p>Rees-ecker method</p> Signup and view all the answers

    Which test measures the adhesion of platelets to a wound surface?

    <p>Saizman method</p> Signup and view all the answers

    What does the in vivo method of Brochgrevink measure?

    <p>Adhesion of platelets to collagen fibers</p> Signup and view all the answers

    What is the purpose of the glass bead column method described in the text?

    <p>To measure the percentage of platelets retained from venous blood</p> Signup and view all the answers

    In the test for adhesion of platelets to collagen fibers, what is the technique based on?

    <p>Enumeration of free and adherent platelets</p> Signup and view all the answers

    What is the purpose of the platelet function tests described in the text?

    <p>To qualitatively and quantitatively evaluate specific platelet functions</p> Signup and view all the answers

    What is the normal range for the clot retraction time according to the text?

    <p>30-60 minutes and complete in 18-24 hours</p> Signup and view all the answers

    Which method is described in the text for the quantitative determination of clot retraction?

    <p>Macfarlane method</p> Signup and view all the answers

    What is the normal range for the platelet factor 3 availability test described in the text?

    <p>37-51 seconds</p> Signup and view all the answers

    Which of the following is the principle behind the clot retraction determination method?

    <p>Evaluating the volume of serum obtained from a clotted blood sample</p> Signup and view all the answers

    What is the significance of the platelet count in the context of capillary fragility or resistance tests?

    <p>Platelets play a crucial role in maintaining capillary integrity and resistance</p> Signup and view all the answers

    In the Rumpel-Leede or Hess test, what is the principle behind the formation of petechiae?

    <p>Increased venous pressure leads to intravasation of blood, forming petechiae</p> Signup and view all the answers

    Which method is used to assess platelet adhesion to collagen fibers?

    <p>None of the above</p> Signup and view all the answers

    What is the grading system used for evaluating the severity of petechiae in the Rumpel-Leede or Hess test?

    <p>1+ (1-10 petechiae), 2+ (11-20 petechiae), 3+ (21-50 petechiae), 4+ (50 and above)</p> Signup and view all the answers

    Which technique is described as a negative pressure method for assessing capillary fragility?

    <p>Suction cup or petechiometer method</p> Signup and view all the answers

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