Red Blood Cell Indices Quiz
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Questions and Answers

What is typically the first indicator of iron deficiency anemia in the serum?

  • Increased serum transferrin
  • Elevated platelet count
  • Decline in serum ferritin (correct)
  • High erythropoietin levels
  • Which of the following clinical features is associated with long-standing iron deficiency anemia?

  • Fingernail abnormalities (correct)
  • Increased energy levels
  • Bright red coloration of the nails
  • Hyperactivity
  • Which laboratory finding is NOT typically associated with iron deficiency anemia?

  • Elevated total iron-binding capacity
  • Microcytic red cell indices
  • Low serum ferritin
  • High iron levels (correct)
  • What is a neurobehavioral complication associated with iron deficiency anemia?

    <p>Pica</p> Signup and view all the answers

    Which dietary deficiency is NOT directly linked to megaloblastic anemia?

    <p>Iron</p> Signup and view all the answers

    Which statement best describes microcytic hypochromic anemia?

    <p>It is a symptom of underlying disorders.</p> Signup and view all the answers

    What metabolic defect is primarily involved in the pathogenesis of megaloblastic anemia?

    <p>Thymidine deficiency</p> Signup and view all the answers

    Which characteristic finding is seen in peripheral smears of iron deficiency anemia?

    <p>Microcytic and hypochromic cells</p> Signup and view all the answers

    What percentage of functional body iron is typically found in hemoglobin?

    <p>80%</p> Signup and view all the answers

    What is the primary cause of iron deficiency anemia in the Western world?

    <p>Chronic blood loss</p> Signup and view all the answers

    Which storage iron component is NOT included in the normal iron storage pool?

    <p>Myoglobin</p> Signup and view all the answers

    What is the average serum iron level in women?

    <p>100 µg/dL</p> Signup and view all the answers

    How much daily iron is typically lost through shedding of epithelial cells?

    <p>1 to 2 mg</p> Signup and view all the answers

    What is the typical daily iron intake from a normal Western diet?

    <p>10 to 20 mg</p> Signup and view all the answers

    What is one significant factor contributing to iron deficiency in developing countries?

    <p>Poor bioavailability of iron</p> Signup and view all the answers

    Which condition can result in malabsorption of iron?

    <p>Celiac disease</p> Signup and view all the answers

    What is a common manifestation of thrombocytopenia?

    <p>Petechiae and ecchymoses</p> Signup and view all the answers

    Which condition is characterized by extensive infiltration of the marrow by tumors or other lesions?

    <p>Myelophthisic anemia</p> Signup and view all the answers

    What indicates hemolytic anemia based on erythroid activity?

    <p>Erythroid hyperplasia and reticulocytosis</p> Signup and view all the answers

    What condition can result from neutropenia?

    <p>Increased risk of serious infections</p> Signup and view all the answers

    Which of the following conditions is NOT typically associated with myelophthisic anemia?

    <p>Chronic cold exposure</p> Signup and view all the answers

    What can be a complication of severe hemolytic anemias?

    <p>Extramedullary hematopoiesis</p> Signup and view all the answers

    What laboratory finding suggests myelophthisic anemia?

    <p>Presence of leukoerythroblastosis</p> Signup and view all the answers

    What is the primary treatment strategy for myelophthisic anemia?

    <p>Treatment directed at the underlying condition</p> Signup and view all the answers

    What does MCV stand for in the context of red blood cell indices?

    <p>Mean Cell Volume</p> Signup and view all the answers

    Which index measures the average mass of hemoglobin per red cell?

    <p>Mean Cell Hemoglobin (MCH)</p> Signup and view all the answers

    How is MCHC expressed in terms of measurement?

    <p>Grams per deciliter</p> Signup and view all the answers

    What does RDW indicate about red cells?

    <p>The size variation of red cells</p> Signup and view all the answers

    Which of the following is NOT a serum iron index?

    <p>Red cell folate concentration</p> Signup and view all the answers

    Which test evaluates the concentration of bilirubin in plasma?

    <p>Plasma unconjugated bilirubin levels</p> Signup and view all the answers

    What does hemoglobin electrophoresis primarily assess?

    <p>Types of hemoglobin present in the sample</p> Signup and view all the answers

    Which index describes the variation of red cell volume?

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

    Which of the following conditions can lead to vitamin B12 deficiency?

    <p>Ileal resection</p> Signup and view all the answers

    What is a characteristic clinical feature of pernicious anemia?

    <p>Loss of position sense</p> Signup and view all the answers

    What is the most common form of anemia in hospitalized patients?

    <p>Anemia of chronic inflammation</p> Signup and view all the answers

    What laboratory finding is associated with vitamin B12 deficiency?

    <p>Elevated serum folate levels</p> Signup and view all the answers

    Which of the following is a cause of aplastic anemia?

    <p>Extrinsic immune-mediated suppression</p> Signup and view all the answers

    What is a potential risk associated with pernicious anemia?

    <p>Increased risk of gastric carcinoma</p> Signup and view all the answers

    What pathological mechanism contributes to anemia of chronic inflammation?

    <p>Suppression of erythropoiesis</p> Signup and view all the answers

    Which condition is characterized by moderate to severe macrocytic anemia?

    <p>Pernicious anemia</p> Signup and view all the answers

    Study Notes

    Red Blood Cell Indices

    • Mean Cell Volume (MCV): Average volume of red blood cells, measured in femtoliters.
    • Mean Cell Hemoglobin (MCH): Average mass of hemoglobin per red blood cell, expressed in picograms.
    • Mean Cell Hemoglobin Concentration (MCHC): Average hemoglobin concentration in a volume of packed red cells, measured in grams per deciliter.
    • Red Cell Distribution Width (RDW): Coefficient of variation of red cell volume, indicating size variability.

    Diagnostic Blood Tests for Anemia

    • Serum iron indices include iron levels, iron-binding capacity, transferrin saturation, and ferritin concentrations.
    • Plasma unconjugated bilirubin, haptoglobin, and lactate levels aid in diagnosis.
    • Measurements of serum and red cell folate, and vitamin B12 concentrations are essential.
    • Hemoglobin electrophoresis and Coombs test help determine type of anemia.
    • Clinical symptoms include weakness, pallor, dyspnea, thrombocytopenia, and potential infections due to neutropenia.

    Myelophthisic Anemia

    • Caused by extensive bone marrow infiltration by tumors or lesions (e.g., metastatic breast or prostate cancer, tuberculosis).
    • Symptoms include anemia, thrombocytopenia, and possible leukoerythroblastosis.
    • Treatment aimed at addressing the underlying condition.

    Hemolytic Anemia

    • Results from accelerated red blood cell destruction, causing increased erythropoietin and reticulocyte release from bone marrow.
    • Characterized by erythroid hyperplasia and possible extramedullary hematopoiesis in organs like liver and spleen.
    • Can be categorized as intrinsic (intracorpuscular) or extrinsic (extracorpuscular).

    Iron Deficiency Anemia

    • Primary cause in the Western world is chronic blood loss, commonly from gastrointestinal and female genital tract sources.
    • In developing nations, diet deficiency and low bioavailability are major causes, impacted by vegetarian diets.
    • Increased demand for iron occurs during pregnancy and infancy, and malabsorption syndromes can exacerbate deficiency.
    • Clinical features include weakness, pallor, and "spooning" of nails; diagnosis relies on hypochromic/microcytic indices and low ferritin.

    Anemia of Diminished Erythropoiesis

    • Caused by insufficient dietary supply of iron, folate, and vitamin B12, as well as conditions like aplastic anemia or bone marrow infiltration.
    • Megaloblastic anemias linked to inadequate DNA synthesis have distinct cell abnormalities.

    Clinical Features of Megaloblastic Anemia

    • Symptoms may include mild jaundice and neurological issues such as numbness and tingling.
    • Diagnosis involves low serum vitamin B12 levels, normal/elevated serum folate, and macrocytic anemia with hypersegmented granulocytes.

    Anemia of Chronic Inflammation

    • Most common in hospitalized patients, often due to suppression of erythropoiesis from systemic inflammation.
    • Associated chronic conditions include infections, immune disorders, and various neoplasms.
    • Treatment focuses on managing the underlying disease.

    Aplastic Anemia

    • Characterized by suppression of multipotent myeloid stem cells, leading to bone marrow failure (pancytopenia).
    • Pathogenesis can be due to immune-mediated suppression and intrinsic stem cell abnormalities, affecting individuals of all ages.

    Iron Metabolism Facts

    • Normal body iron mass is approximately 2.5g in women and 3.5g in men; 80% of iron is found in hemoglobin.
    • Iron is transported via transferrin and is 33% saturated with iron; normal serum iron levels are around 120 µg/dL in men and 100 µg/dL in women.
    • Daily dietary iron intake averages 10-20mg, with heme iron being more absorbable than nonheme iron.

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    Description

    Test your knowledge on the characteristics and indices of red blood cells. This quiz covers topics such as Mean Cell Volume (MCV) and how to assess red cell size, color, and shape through visual inspection. Perfect for students learning about hematology.

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