Chapter 43: Hematologic & Immunologic Disorders in Children

Hematologic & Immunologic Disorders in Children begins with an analysis of essential diagnostic tools, particularly the complete blood count, to interpret red blood cell indices, white blood cell differentials, and platelet functionality. A significant focus is placed on various forms of anemia, which are classified by their cellular morphology or physiological origins, such as decreased production, increased destruction, or acute blood loss. Iron-deficiency anemia is identified as a prevalent and preventable nutritional challenge, often exacerbated by high cow’s milk intake in young children or rapid growth during adolescence. The text moves into hereditary hemoglobinopathies, specifically sickle cell disease, where defective hemoglobin causes red blood cells to lose their shape, leading to vaso-occlusive crises, intense pain, and potential organ infarction. Management strategies for these patients involve aggressive hydration, specialized pain protocols, and the use of disease-modifying agents like hydroxyurea. Similarly, the chapter details beta-thalassemia, highlighting the burden of lifelong blood transfusions and the vital necessity of chelation therapy to prevent toxic iron accumulation. The discussion extends to bone marrow failure in aplastic anemia and defects in hemostasis, such as hemophilia, where genetic deficiencies in clotting factors necessitate prompt replacement therapy to prevent joint crippling. Immune-mediated conditions, including immune thrombocytopenia and disseminated intravascular coagulation, are explored as disorders of platelet destruction and systemic coagulation imbalance. Furthermore, the chapter addresses immunologic deficiencies, ranging from the chronic management of human immunodeficiency virus via antiretroviral therapy to severe, life-threatening congenital conditions like severe combined immunodeficiency. Nurses are guided on how to minimize tissue oxygen demands, prevent opportunistic infections, and provide holistic support to families navigating the stressors of chronic childhood illness.