✍️ Hematocrit represents the percentage of total blood volume occupied by red blood cells.

✍️ Anemia generally causes a reduction in the number of circulating red blood cells or red cell mass.

✍️ Reduced red blood cell mass commonly results in a decreased hematocrit rather than an increased hematocrit.

✍️ Hematocrit values are often evaluated together with hemoglobin and red blood cell count when assessing anemia.

✍️ Lower hematocrit can reduce the blood's overall oxygen-carrying capacity.

✍️ The degree of hematocrit reduction depends on the type, severity, and duration of anemia.

✍️ Conditions associated with increased erythrocyte production tend to increase hematocrit, which contrasts with anemia.

✍️ Anemia is therefore the factor that does not increase hematocrit.

🔆 Erythrocytes, also called red blood cells, are the formed elements primarily responsible for oxygen transport.

🔆 Erythrocytes contain large amounts of hemoglobin, the protein that binds oxygen.

🔆 Oxygen enters the blood in the pulmonary capillaries and binds to hemoglobin inside erythrocytes.

🔆 Oxygen-rich erythrocytes circulate through the systemic circulation and deliver oxygen to body tissues.

🔆 The biconcave shape of erythrocytes increases surface area and facilitates efficient gas exchange.

🔆 Mature erythrocytes lack a nucleus, allowing more intracellular space to be occupied by hemoglobin.

🔆 Adequate numbers of functioning erythrocytes are essential for maintaining normal tissue oxygenation.

🔆 Erythrocytes are therefore the formed blood element responsible for transporting oxygen attached to hemoglobin.

❣️ Thrombocytopenia means that the number of circulating platelets is below the expected range.

❣️ Platelets are essential for primary hemostasis and formation of the initial platelet plug after vascular injury.

❣️ A decreased platelet count impairs the body's ability to stop bleeding effectively.

❣️ Clients with thrombocytopenia may develop petechiae, purpura, ecchymosis, or prolonged bleeding.

❣️ Bleeding may occur from the gums, nose, gastrointestinal tract, urinary tract, or other sites depending on severity.

❣️ The risk of spontaneous bleeding generally increases as the platelet count becomes progressively lower.

❣️ Nursing care includes monitoring for bleeding and avoiding unnecessary procedures that could cause tissue trauma when thrombocytopenia is significant.

❣️ Thrombocytopenia therefore increases the client's risk of excessive bleeding.

✳️ Lymphocytes are normally more abundant than monocytes in the differential white blood cell count.

✳️ Lymphocytes commonly account for approximately 20% to 40% of circulating white blood cells in adults.

✳️ Monocytes usually represent a smaller proportion, commonly around 2% to 8% of circulating white blood cells.

✳️ Lymphocytes play major roles in adaptive immunity, including antibody production and cell-mediated immune responses.

✳️ Monocytes primarily function as phagocytic cells and can differentiate into macrophages within tissues.

✳️ A differential blood count evaluates the relative percentages of different types of leukocytes.

✳️ Finding more lymphocytes than monocytes is therefore consistent with the expected adult differential pattern.

✳️ The statement is true because lymphocytes normally occur in greater numbers than monocytes.

🧿 Agglutinins are antibodies in plasma that can react with specific antigens, called agglutinogens, on red blood cells.

🧿 An incompatible blood transfusion can expose recipient antibodies to their corresponding red blood cell antigens.

🧿 Antibody-antigen binding causes red blood cells to agglutinate or clump together.

🧿 Agglutinated red blood cells can obstruct small blood vessels and interfere with normal circulation.

🧿 The immune reaction can also trigger hemolysis, resulting in destruction of incompatible erythrocytes.

🧿 Severe transfusion reactions can lead to complications such as hypotension, kidney injury, shock, and disseminated intravascular coagulation.

🧿 Correct blood typing and crossmatching are essential for preventing incompatible transfusions.

🧿 Agglutination is therefore the immediate characteristic reaction when an agglutinin encounters its specific agglutinogen.

♦️ Rho(D) immune globulin (RhoGAM) is given to eligible Rh-negative pregnant clients to prevent sensitization to the Rh(D) antigen.

♦️ An Rh-negative mother can become exposed to Rh-positive fetal red blood cells during pregnancy, delivery, or certain obstetric events.

♦️ Exposure can stimulate the maternal immune system to produce anti-D antibodies if prophylaxis is not provided.

♦️ RhoGAM contains antibodies that bind Rh-positive fetal red blood cells before the mother's immune system becomes sensitized.

♦️ Prevention of sensitization reduces the risk of hemolytic disease of the fetus and newborn in subsequent Rh-positive pregnancies.

♦️ RhoGAM is commonly administered during pregnancy and again after delivery when indicated based on maternal and infant Rh status.

♦️ Additional doses may be required following events associated with fetomaternal hemorrhage, such as trauma or certain procedures.

♦️ The statement is therefore true because RhoGAM helps prevent formation of maternal anti-Rh antibodies.

🖍️ A person with type B blood has B antigens present on the surface of erythrocytes.

🖍️ Anti-B reagent contains antibodies that specifically bind to B antigens.

🖍️ Mixing type B red blood cells with anti-B reagent therefore causes visible agglutination.

🖍️ Type B red blood cells do not have A antigens, so agglutination would not occur in the anti-A well.

🖍️ The anti-D well determines Rh status, which cannot be established from the designation “type B” alone.

🖍️ A person with B-positive blood would agglutinate in both the anti-B and anti-D wells.

🖍️ A person with B-negative blood would agglutinate only in the anti-B well.

🖍️ Based solely on the information provided, Anti-B well is the only selection that can definitely be identified.

♠️ A person who has both A and B antigens has type AB blood.

♠️ The absence of anti-A and anti-B antibodies allows a person with type AB blood to receive red blood cells containing either A or B antigens without an ABO antibody reaction.

♠️ The presence of the D antigen indicates that the person is Rh positive.

♠️ An AB-positive recipient can receive red blood cells from A, B, AB, or O donors within the ABO system.

♠️ An Rh-positive recipient can generally receive either Rh-positive or Rh-negative red blood cells.

♠️ Type AB positive is therefore commonly described as the universal recipient for red blood cell transfusions.

♠️ Compatibility testing and appropriate crossmatching are still required before transfusion despite this broad compatibility.

♠️ The statement is therefore true for red blood cell transfusion compatibility.