The Essentials of CBC and Hemostasis Testing

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Questions and Answers

Which method is used for automated cell counting today?

  • Electrical-Impedance
  • Light-Scatter
  • Both Electrical-Impedance and Light-Scatter (correct)
  • None of the above

Who led the characterization of RBC indices and definitions of anemia?

  • Maxwell M. Wintrobe
  • Weisse AB
  • Max Wintrobe (correct)
  • Fred HL

What is hematocrit?

  • The percentage of total blood volume occupied by plasma
  • The percentage of total blood volume occupied by red blood cells (correct)
  • The percentage of total blood volume occupied by white blood cells
  • The percentage of total blood volume occupied by platelets

What does ESR stand for?

<p>Erythrocyte Sedimentation Rate (A)</p> Signup and view all the answers

What does MCV stand for?

<p>Mean Corpuscular (Cell) Volume (C)</p> Signup and view all the answers

What does RDW stand for?

<p>Red Blood Cell Distribution Width (C)</p> Signup and view all the answers

What does MCH stand for?

<p>Mean Corpuscular Hemoglobin (C)</p> Signup and view all the answers

What does MCHC stand for?

<p>Mean Corpuscular Hemoglobin Concentration (D)</p> Signup and view all the answers

What does lymphocytopenia refer to?

<p>Decrease in lymphocytes (C)</p> Signup and view all the answers

What is the most common cause of lymphocytopenia?

<p>AIDS (C)</p> Signup and view all the answers

Which of the following is a component of the complete blood count (CBC)?

<p>Total RBC Count (B)</p> Signup and view all the answers

What is the purpose of the Erythrocyte Sedimentation Rate (ESR) test?

<p>To detect inflammation or infection (D)</p> Signup and view all the answers

What is the significance of reporting leukocyte differential counts as relative percentages?

<p>It helps in identifying specific types of white blood cells (B)</p> Signup and view all the answers

What is the main advantage of reporting leukocyte differential counts as absolute numbers?

<p>It provides a more accurate assessment of the total white blood cell count (B)</p> Signup and view all the answers

Which laboratory diagnostic procedure is used to approach patients with bleeding disorders?

<p>PT (B)</p> Signup and view all the answers

What does MCH stand for in blood indices?

<p>Mean Corpuscular Hemoglobin (A)</p> Signup and view all the answers

What does MCV stand for in blood indices?

<p>Mean Corpuscular Volume (A)</p> Signup and view all the answers

What does MCHC stand for in blood indices?

<p>Mean Corpuscular Hemoglobin Concentration (C)</p> Signup and view all the answers

Which historical figure visualized blood cells using a microscope?

<p>A van Leeuwenhoek (C)</p> Signup and view all the answers

What is the purpose of the Platelet Count test?

<p>To measure the concentration of platelets (D)</p> Signup and view all the answers

Which of the following is true about relative lymphocytosis?

<p>It occurs when there is a higher proportion of lymphocytes among the white blood cells. (A)</p> Signup and view all the answers

What is the normal range for lymphocytes?

<p>20 to 40 1000 to 4750 /mm3 (C)</p> Signup and view all the answers

What is the normal range for eosinophils?

<p>0 to 4 0 to 450/mm3 (D)</p> Signup and view all the answers

What is the normal range for monocytes?

<p>2 to 9 100 to 700 /mm3 (D)</p> Signup and view all the answers

What is the normal range for basophils?

<p>0 to 2 0 to 200 /mm3 (B)</p> Signup and view all the answers

What is the purpose of mixing studies in determining a clotting defect?

<p>To determine the presence of a coagulation factor inhibitor. (B)</p> Signup and view all the answers

Which conditions may be present when the PT result is prolonged and the PTT result is normal?

<p>Liver disease, decreased vitamin K, decreased or defective factor VII, chronic low-grade disseminated intravascular coagulation (DIC), anticoagulation drug (warfarin) therapy (D)</p> Signup and view all the answers

Which conditions may be present when the PT result is normal and the PTT result is prolonged?

<p>Decreased or defective factor VIII, IX, XI, or XII, von Willebrand disease (severe type), presence of lupus anticoagulant, autoantibody against a specific factor (e.g., factor VIII) (B)</p> Signup and view all the answers

What is the purpose of factor-specific testing in diagnosing clotting disorders?

<p>To determine the presence of a coagulation factor inhibitor (B)</p> Signup and view all the answers

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