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Questions and Answers
What can result from acute, severe, or prolonged decreases from normal hemostasis?
What can result from acute, severe, or prolonged decreases from normal hemostasis?
abnormal hemostasis that presents as prolonged bleeding from minor trauma or spontaneous bleeding without injury
What are some underlying causes of platelet disorders?
What are some underlying causes of platelet disorders?
Cancers, aplastic anemia, leukemia, lymphoma, myeloma, myelodysplastic disorders, marrow metastases, drugs, immune thrombocytopenia, infections, nutrition deficiencies, and radiation
What is a common mechanism of drug-related thrombocytopenia?
What is a common mechanism of drug-related thrombocytopenia?
accelerated platelet destruction caused by antibodies
What is immune thrombocytopenia (ITP)?
What is immune thrombocytopenia (ITP)?
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What can cause increased platelet destruction?
What can cause increased platelet destruction?
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What is a common effect of massive blood transfusion or fluids on platelets?
What is a common effect of massive blood transfusion or fluids on platelets?
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What is a possible inherited platelet disorder?
What is a possible inherited platelet disorder?
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What is a common cause of acquired platelet disorders?
What is a common cause of acquired platelet disorders?
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What is the significance of recent or excessive bleeding in health history assessment?
What is the significance of recent or excessive bleeding in health history assessment?
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What laboratory study is used to diagnose or monitor hemolysis in thrombocytopenia?
What laboratory study is used to diagnose or monitor hemolysis in thrombocytopenia?
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What is the primary goal of nursing care for the patient with thrombocytopenia?
What is the primary goal of nursing care for the patient with thrombocytopenia?
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What is the significance of aPTT in diagnosing thrombocytopenia?
What is the significance of aPTT in diagnosing thrombocytopenia?
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What is the purpose of history and physical assessment in diagnosing thrombocytopenia?
What is the purpose of history and physical assessment in diagnosing thrombocytopenia?
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What is the significance of bone marrow aspiration and biopsy in diagnosing thrombocytopenia?
What is the significance of bone marrow aspiration and biopsy in diagnosing thrombocytopenia?
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What is the implication of impaired tissue perfusion in thrombocytopenia?
What is the implication of impaired tissue perfusion in thrombocytopenia?
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Why is it essential to prioritize the clinical problem of thrombocytopenia?
Why is it essential to prioritize the clinical problem of thrombocytopenia?
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What is the immune-mediated response to heparin that leads to platelet destruction and vascular endothelial injury?
What is the immune-mediated response to heparin that leads to platelet destruction and vascular endothelial injury?
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What complex binds to the platelet surface, leading to further platelet activation and release of more Platelet Factor 4 (PF4)?
What complex binds to the platelet surface, leading to further platelet activation and release of more Platelet Factor 4 (PF4)?
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What laboratory tests can help diagnose Heparin-Induced Thrombocytopenia (HIT)?
What laboratory tests can help diagnose Heparin-Induced Thrombocytopenia (HIT)?
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Why may a patient with HIT need a splenectomy?
Why may a patient with HIT need a splenectomy?
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What is the result of the positive feedback loop in Heparin-Induced Thrombocytopenia (HIT)?
What is the result of the positive feedback loop in Heparin-Induced Thrombocytopenia (HIT)?
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What is the role of macrophages in the spleen in relation to platelets?
What is the role of macrophages in the spleen in relation to platelets?
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What can be done to examine if production problems are the cause of thrombocytopenia?
What can be done to examine if production problems are the cause of thrombocytopenia?
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What is the significance of prothrombin time (PT) and activated partial thromboplastin time (aPTT) in diagnosing Heparin-Induced Thrombocytopenia (HIT)?
What is the significance of prothrombin time (PT) and activated partial thromboplastin time (aPTT) in diagnosing Heparin-Induced Thrombocytopenia (HIT)?
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What is a common symptom of thrombocytopenia?
What is a common symptom of thrombocytopenia?
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What is the result of the spleen normally sequestering about one third of the platelets?
What is the result of the spleen normally sequestering about one third of the platelets?
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What is aplastic anemia characterized by?
What is aplastic anemia characterized by?
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What is the main concern in acute blood loss?
What is the main concern in acute blood loss?
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What is the platelet count at which prolonged bleeding from trauma or injury usually occurs?
What is the platelet count at which prolonged bleeding from trauma or injury usually occurs?
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What is the main effect of chronic blood loss?
What is the main effect of chronic blood loss?
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What is the result of the platelet count being under 20,000/μL (20 × 109/L)?
What is the result of the platelet count being under 20,000/μL (20 × 109/L)?
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What is sickle cell anemia characterized by?
What is sickle cell anemia characterized by?
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What is a manifestation of internal blood loss in thrombocytopenia?
What is a manifestation of internal blood loss in thrombocytopenia?
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What may indicate thrombocytopenia?
What may indicate thrombocytopenia?
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What is the goal of managing chronic blood loss anemia?
What is the goal of managing chronic blood loss anemia?
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Why does antiplatelet antibody synthesis decrease after splenectomy?
Why does antiplatelet antibody synthesis decrease after splenectomy?
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What is the incidence rate of aplastic anemia in the United States?
What is the incidence rate of aplastic anemia in the United States?
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What is the major complication of thrombocytopenia?
What is the major complication of thrombocytopenia?
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How does the body respond to gradual acute blood loss?
How does the body respond to gradual acute blood loss?
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What is a potential complication of aplastic anemia?
What is a potential complication of aplastic anemia?
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What is megaloblastic anemia caused by, and what are the common causes?
What is megaloblastic anemia caused by, and what are the common causes?
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What is pernicious anemia, and what is its most common age of diagnosis?
What is pernicious anemia, and what is its most common age of diagnosis?
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What are the manifestations of folic acid deficiency, and how is it diagnosed?
What are the manifestations of folic acid deficiency, and how is it diagnosed?
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What are the nursing measures for a patient with folic acid deficiency anemia?
What are the nursing measures for a patient with folic acid deficiency anemia?
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What is the usual dosage of folic acid replacement therapy?
What is the usual dosage of folic acid replacement therapy?
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What is the normal serum folate level?
What is the normal serum folate level?
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What can cause neurologic symptoms in folic acid deficiency?
What can cause neurologic symptoms in folic acid deficiency?
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What is the significance of erythroleukemia in megaloblastic anemia?
What is the significance of erythroleukemia in megaloblastic anemia?
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What is the most common nutrition disorder in the world, and who are the most susceptible individuals to this disorder?
What is the most common nutrition disorder in the world, and who are the most susceptible individuals to this disorder?
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Describe the normal daily loss of iron in the body.
Describe the normal daily loss of iron in the body.
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What is anemia, and what are its common causes?
What is anemia, and what are its common causes?
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What is the underlying cause of thalassemia, and how does it affect RBC production?
What is the underlying cause of thalassemia, and how does it affect RBC production?
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What is the characteristic of megaloblastic anemia, and why are these RBCs easily destroyed?
What is the characteristic of megaloblastic anemia, and why are these RBCs easily destroyed?
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What are the two classifications of anemia, and how do they differ?
What are the two classifications of anemia, and how do they differ?
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What is the effect of defective deoxyribonucleic acid (DNA) synthesis in RBCs?
What is the effect of defective deoxyribonucleic acid (DNA) synthesis in RBCs?
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What is the normal life span of an RBC, and what is the balance that ensures an adequate number of RBCs?
What is the normal life span of an RBC, and what is the balance that ensures an adequate number of RBCs?
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What is aplastic anemia characterized by?
What is aplastic anemia characterized by?
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What are the types of anemia caused by decreased RBC production, and what are their causes?
What are the types of anemia caused by decreased RBC production, and what are their causes?
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How do the causes of anemia affect the classification and diagnosis of the condition?
How do the causes of anemia affect the classification and diagnosis of the condition?
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What is the result of anemia of chronic disease?
What is the result of anemia of chronic disease?
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What is the role of the CBC, reticulocyte count, and peripheral blood smear in the diagnosis of anemia?
What is the role of the CBC, reticulocyte count, and peripheral blood smear in the diagnosis of anemia?
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What are the three problems that can lead to decreased RBC production?
What are the three problems that can lead to decreased RBC production?
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How do morphologic and etiologic classifications of anemia relate to patient care?
How do morphologic and etiologic classifications of anemia relate to patient care?
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What is the significance of understanding the causes of anemia in developing effective treatment and management strategies?
What is the significance of understanding the causes of anemia in developing effective treatment and management strategies?
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What is the primary concern in acute blood loss?
What is the primary concern in acute blood loss?
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What is the main effect of chronic blood loss?
What is the main effect of chronic blood loss?
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What is the characteristic of sickle cell anemia?
What is the characteristic of sickle cell anemia?
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What is aplastic anemia characterized by?
What is aplastic anemia characterized by?
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What is the goal of managing chronic blood loss anemia?
What is the goal of managing chronic blood loss anemia?
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What is the incidence rate of aplastic anemia in the United States?
What is the incidence rate of aplastic anemia in the United States?
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What is the result of the platelet count being under 20,000/μL (20 × 109/L)?
What is the result of the platelet count being under 20,000/μL (20 × 109/L)?
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How does the body respond to gradual acute blood loss?
How does the body respond to gradual acute blood loss?
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What is the action of Vitamin B12 in the body, and how is it related to RBC production?
What is the action of Vitamin B12 in the body, and how is it related to RBC production?
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What is the purpose of Epoetin Alfa, and how does it trigger the bone marrow to produce more RBCs?
What is the purpose of Epoetin Alfa, and how does it trigger the bone marrow to produce more RBCs?
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What are the expected outcomes for a patient with leukemia who is receiving treatment for anemia?
What are the expected outcomes for a patient with leukemia who is receiving treatment for anemia?
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What is the definition of Thrombocytopenia, and what is the normal platelet count?
What is the definition of Thrombocytopenia, and what is the normal platelet count?
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What is the importance of patient education for a patient with anemia, and what should the patient be educated on?
What is the importance of patient education for a patient with anemia, and what should the patient be educated on?
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What is the role of Epoetin Alfa in treating anemia, and how does it affect the bone marrow?
What is the role of Epoetin Alfa in treating anemia, and how does it affect the bone marrow?
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What is the importance of monitoring blood pressure, reporting leg pain and chest pain, and adhering to medication regimen and diagnostic testing for a patient receiving Epoetin Alfa?
What is the importance of monitoring blood pressure, reporting leg pain and chest pain, and adhering to medication regimen and diagnostic testing for a patient receiving Epoetin Alfa?
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What are the expected outcomes for a patient with anemia who is receiving treatment, and what are the key indicators of successful treatment?
What are the expected outcomes for a patient with anemia who is receiving treatment, and what are the key indicators of successful treatment?
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What is megaloblastic anemia caused by, and what are the common causes?
What is megaloblastic anemia caused by, and what are the common causes?
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What is pernicious anemia, and what is its most common age of diagnosis?
What is pernicious anemia, and what is its most common age of diagnosis?
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What are the manifestations of folic acid deficiency, and how is it diagnosed?
What are the manifestations of folic acid deficiency, and how is it diagnosed?
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What is the usual dosage of folic acid replacement therapy?
What is the usual dosage of folic acid replacement therapy?
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What is the significance of erythroleukemia in megaloblastic anemia?
What is the significance of erythroleukemia in megaloblastic anemia?
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What are the nursing measures for a patient with folic acid deficiency anemia?
What are the nursing measures for a patient with folic acid deficiency anemia?
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What can cause neurologic symptoms in folic acid deficiency?
What can cause neurologic symptoms in folic acid deficiency?
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What is the normal serum folate level?
What is the normal serum folate level?
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What is the most common nutrition disorder in the world, and who are the most susceptible individuals to this disorder?
What is the most common nutrition disorder in the world, and who are the most susceptible individuals to this disorder?
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What is the normal daily loss of iron in the body?
What is the normal daily loss of iron in the body?
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What is the result of defective DNA synthesis in RBCs?
What is the result of defective DNA synthesis in RBCs?
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What is thalassemia, and what is its effect on RBC production?
What is thalassemia, and what is its effect on RBC production?
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What is the characteristic of RBCs in megaloblastic anemia?
What is the characteristic of RBCs in megaloblastic anemia?
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What is the effect of aplastic anemia on RBC precursors?
What is the effect of aplastic anemia on RBC precursors?
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What is the common location of thalassemia occurrence?
What is the common location of thalassemia occurrence?
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What is the effect of hemolysis on RBCs in thalassemia?
What is the effect of hemolysis on RBCs in thalassemia?
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What is the primary cause of anemia, and what are the three main categories of its causes?
What is the primary cause of anemia, and what are the three main categories of its causes?
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What is the normal life span of an RBC, and how is the balance of RBC production and destruction maintained?
What is the normal life span of an RBC, and how is the balance of RBC production and destruction maintained?
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What is the difference between morphologic and etiologic classification of anemia, and which one is more accurate?
What is the difference between morphologic and etiologic classification of anemia, and which one is more accurate?
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What is the primary cause of iron deficiency anemia, and what are the common manifestations of this condition?
What is the primary cause of iron deficiency anemia, and what are the common manifestations of this condition?
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What is thalassemia, and what are the common manifestations of this condition?
What is thalassemia, and what are the common manifestations of this condition?
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What is megaloblastic anemia, and what are the common causes of this condition?
What is megaloblastic anemia, and what are the common causes of this condition?
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What is anemia of chronic disease, and what are the common causes of this condition?
What is anemia of chronic disease, and what are the common causes of this condition?
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What is the significance of erythropoiesis in the development of anemia, and how can it be affected by various diseases?
What is the significance of erythropoiesis in the development of anemia, and how can it be affected by various diseases?
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What is the primary effect of chronic blood loss on the body's ability to transport oxygen?
What is the primary effect of chronic blood loss on the body's ability to transport oxygen?
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How does the body respond to gradual acute blood loss?
How does the body respond to gradual acute blood loss?
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What is the main goal of managing chronic blood loss anemia?
What is the main goal of managing chronic blood loss anemia?
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What is the characteristic of sickle cell anemia?
What is the characteristic of sickle cell anemia?
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What is the significance of iron deficiency in chronic blood loss?
What is the significance of iron deficiency in chronic blood loss?
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How does aplastic anemia affect the bone marrow?
How does aplastic anemia affect the bone marrow?
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What is the main concern in acute blood loss?
What is the main concern in acute blood loss?
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What is the incidence rate of aplastic anemia in the United States?
What is the incidence rate of aplastic anemia in the United States?
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What is the mechanism of action of Epoetin Alfa, and how does it benefit patients with anemia?
What is the mechanism of action of Epoetin Alfa, and how does it benefit patients with anemia?
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What is the significance of Vitamin B12 in RBC production and DNA synthesis, and what are the consequences of its deficiency?
What is the significance of Vitamin B12 in RBC production and DNA synthesis, and what are the consequences of its deficiency?
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What are the expected outcomes of treatment for anemia, and how can they be achieved?
What are the expected outcomes of treatment for anemia, and how can they be achieved?
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What is the definition of Thrombocytopenia, and what are its implications for patients?
What is the definition of Thrombocytopenia, and what are its implications for patients?
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What is the role of folic acid in the prevention of megaloblastic anemia, and what are the manifestations of its deficiency?
What is the role of folic acid in the prevention of megaloblastic anemia, and what are the manifestations of its deficiency?
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What is the significance of iron in erythropoiesis, and what are the consequences of its deficiency?
What is the significance of iron in erythropoiesis, and what are the consequences of its deficiency?
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What is the pathophysiology of anemia of chronic disease, and how does it differ from other types of anemia?
What is the pathophysiology of anemia of chronic disease, and how does it differ from other types of anemia?
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What is the genetic basis of thalassemia, and how does it affect RBC production?
What is the genetic basis of thalassemia, and how does it affect RBC production?
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Study Notes
Thrombocytopenia
- Acute, severe, or prolonged decreases from normal can result in abnormal hemostasis, presenting as prolonged bleeding from minor trauma or spontaneous bleeding without injury
- Causes of platelet disorders:
- Cancers and other disorders
- Aplastic anemia
- Leukemia, lymphoma, myeloma, myelodysplastic disorders
- Marrow metastases by solid tumors
- Drugs (chemotherapy, others)
- Immune thrombocytopenia (ITP)
- Infections (bacterial, fungal, viral)
- Nutrition deficiencies, alcohol use
- Radiation
Increased Platelet Destruction
- Artificial surfaces (e.g., cardiopulmonary bypass, hemodialysis)
- Disseminated intravascular coagulation (DIC)
- Heparin-induced thrombocytopenia (HIT)
- Pregnancy-related
- Thrombotic microangiopathy
- Atypical hemolytic uremic syndromes (aHUSs)
- Thrombotic thrombocytopenic purpura (TTP)
Abnormal Platelet Distribution
- Dilution (massive blood transfusion, fluids)
- Splenic sequestration
Immune Thrombocytopenia (ITP)
- Most commonly acquired thrombocytopenia
- Acquired immune disorder where there is abnormal platelet destruction
- Antibody synthesis occurs in the spleen, so antiplatelet antibodies decrease after splenectomy
- Spleen normally sequesters about one-third of platelets, so its removal increases the number of platelets in circulation
Clinical Manifestations of Thrombocytopenia
- Bleeding (mucosal, cutaneous, internal)
- Petechiae, purpura, or bruising
- Pain and tenderness
- Insidious or acute bleeding from trauma or injury
- Prolonged bleeding from minor trauma or spontaneous bleeding
- Life-threatening bleeding (e.g., intracranial bleeding) can occur when platelet count is under 20,000/μL (20 × 109/L)
Laboratory Studies for Thrombocytopenia
- Platelets
- Hemolysis tests (haptoglobin, Hgb, indirect bilirubin, LDH, reticulocytes, schistocytes)
- Coagulopathy tests (PT, aPTT, D dimer)
- Urinalysis (for proteinuria, hematuria)
- Creatinine
- ADAMTS13 assay
- PF4-heparin complex assay
Diagnostic Tests for Thrombocytopenia
- History and physical assessment
- Bone marrow aspiration and biopsy
- CBC, including platelet count
Nursing Goals for Thrombocytopenia
- Patient will have no bleeding
- Patient will maintain vascular integrity
- Patient will manage self-care related to increased risk for bleeding
Megaloblastic Anemias
- Caused by impaired DNA synthesis, resulting in defective RBC maturation
- Most common causes: cobalamin (vitamin B12) and folic acid deficiencies
- Can also occur due to congenital disorders, suppression of DNA synthesis by drugs, inborn errors of cobalamin and folic acid metabolism, and erythroleukemia
Pernicious Anemia
- Caused by an absence of intrinsic factor (IF)
- Disease of insidious onset, typically beginning in middle age or later (after age 40)
- Most common in persons of Northern European descent (especially Scandinavians) and Blacks
Folic Acid Deficiency
- Causes megaloblastic anemia
- Folic acid is needed for DNA synthesis leading to RBC formation and maturation
- Common causes of folic acid deficiency include:
- Inadequate dietary intake
- Malabsorption
- Increased demand (e.g., pregnancy, inflammatory bowel disease)
- Impaired utilization (e.g., liver disease, cancer)
- Symptoms: similar to cobalamin deficiency, including insidious onset, GI problems, and neurologic symptoms
- Diagnostic findings: low serum folate level (normal: 5-25 ng/mL or 11-57 nmol/L), normal serum cobalamin level
- Treatment: replacement therapy with 1-5 mg/day oral folic acid, with duration depending on the reason for the deficiency
Problems Leading to Decreased RBC Production
- Decreased Hgb synthesis: iron deficiency anemia, thalassemia, and sideroblastic anemia
- Defective DNA synthesis in RBCs: cobalamin deficiency, folic acid deficiency, and megaloblastic anemias
- Diminished availability of RBC precursors: aplastic anemia and anemia of chronic disease
Iron Deficiency Anemia
- Most common nutrition disorder in the world
- Those most susceptible: very young, those on poor diets, and women in their reproductive years
- Normally, 1 mg of iron lost daily in urine, bile, sweat, sloughing of epithelial cells from the skin and intestinal mucosa, and minor bleeding
Thalassemia
- Group of diseases involving inadequate production of normal Hgb, decreasing RBC production
- Due to absent or reduced globulin protein (α-globin chains in α-thalassemia, β-globin chains in β-thalassemia)
- Hemolysis occurs as mononuclear phagocytes in the marrow destroy most erythroblasts
- Commonly found in persons of Mediterranean, Southeastern Asian, Middle Eastern, Indian, Pakistani, Chinese, and African descent
Megaloblastic Anemia
- Characterized by the presence of abnormally large (macrocytic) RBCs
- Macrocytic RBCs are easily destroyed due to fragile cell membranes
Thrombocytopenia
- Reduction of platelets to less than 150,000/μL (150 × 10^9/L)
Anemia
- Deficiency in the number of erythrocytes (RBCs), the quantity or quality of hemoglobin (Hgb), and/or volume of packed RBCs (hematocrit)
- Not a specific disease, but a manifestation of a pathologic process
- Common condition with many diverse causes, including blood loss, impaired RBC production, or increased RBC destruction
Megaloblastic Anemias
- Caused by impaired DNA synthesis, resulting in defective RBC maturation
- Most common causes: cobalamin (vitamin B12) and folic acid deficiencies
- Can also occur due to congenital disorders, suppression of DNA synthesis by drugs, inborn errors of cobalamin and folic acid metabolism, and erythroleukemia
Pernicious Anemia
- Caused by an absence of intrinsic factor (IF)
- Disease of insidious onset, typically beginning in middle age or later (after age 40)
- Most common in persons of Northern European descent (especially Scandinavians) and Blacks
Folic Acid Deficiency
- Causes megaloblastic anemia
- Folic acid is needed for DNA synthesis leading to RBC formation and maturation
- Common causes of folic acid deficiency include:
- Inadequate dietary intake
- Malabsorption
- Increased demand (e.g., pregnancy, inflammatory bowel disease)
- Impaired utilization (e.g., liver disease, cancer)
- Symptoms: similar to cobalamin deficiency, including insidious onset, GI problems, and neurologic symptoms
- Diagnostic findings: low serum folate level (normal: 5-25 ng/mL or 11-57 nmol/L), normal serum cobalamin level
- Treatment: replacement therapy with 1-5 mg/day oral folic acid, with duration depending on the reason for the deficiency
Problems Leading to Decreased RBC Production
- Decreased Hgb synthesis: iron deficiency anemia, thalassemia, and sideroblastic anemia
- Defective DNA synthesis in RBCs: cobalamin deficiency, folic acid deficiency, and megaloblastic anemias
- Diminished availability of RBC precursors: aplastic anemia and anemia of chronic disease
Iron Deficiency Anemia
- Most common nutrition disorder in the world
- Those most susceptible: very young, those on poor diets, and women in their reproductive years
- Normally, 1 mg of iron lost daily in urine, bile, sweat, sloughing of epithelial cells from the skin and intestinal mucosa, and minor bleeding
Thalassemia
- Group of diseases involving inadequate production of normal Hgb, decreasing RBC production
- Due to absent or reduced globulin protein (α-globin chains in α-thalassemia, β-globin chains in β-thalassemia)
- Hemolysis occurs as mononuclear phagocytes in the marrow destroy most erythroblasts
- Commonly found in persons of Mediterranean, Southeastern Asian, Middle Eastern, Indian, Pakistani, Chinese, and African descent
Megaloblastic Anemia
- Characterized by the presence of abnormally large (macrocytic) RBCs
- Macrocytic RBCs are easily destroyed due to fragile cell membranes
Thrombocytopenia
- Reduction of platelets to less than 150,000/μL (150 × 10^9/L)
Anemia
- Deficiency in the number of erythrocytes (RBCs), the quantity or quality of hemoglobin (Hgb), and/or volume of packed RBCs (hematocrit)
- Not a specific disease, but a manifestation of a pathologic process
- Common condition with many diverse causes, including blood loss, impaired RBC production, or increased RBC destruction
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Description
This quiz covers the causes and effects of thrombocytopenia, including cancers, anemia, leukemia, and more. Learn about the disorders that can lead to abnormal hemostasis and bleeding.