NCLEX Review Guide: β-Thalassemia Major in Pediatric Patients

Disease Overview

• β-Thalassemia Major (Cooley's Anemia) is an autosomal recessive disorder causing severe deficiency or absence of β-globin chains, resulting in ineffective erythropoiesis and severe hemolytic anemia.
• Symptoms typically appear by 6 months of age when fetal hemoglobin (HbF) levels decline and adult hemoglobin synthesis becomes necessary.
• Children present with severe pallor, failure to thrive, hepatosplenomegaly, and characteristic facial bone changes due to extramedullary hematopoiesis.

Primary Treatment Interventions

• Regular blood transfusions every 2-4 weeks are the mainstay of treatment to maintain hemoglobin levels >9-10 g/dL and suppress ineffective erythropoiesis.
• Iron chelation therapy with deferoxamine, deferasirox, or deferiprone is essential to prevent iron overload from chronic transfusions.
• Bone marrow transplantation offers the only potential cure, with best outcomes when performed in children <16 years with minimal organ damage.

1. Pre-transfusion: Obtain baseline vital signs, verify blood type and crossmatch, assess for transfusion reactions
2. During transfusion: Monitor for signs of fluid overload, allergic reactions, or hemolytic reactions
3. Post-transfusion: Assess hemoglobin response, monitor for delayed reactions, document tolerance

Iron Overload Complications

• Cardiac complications including cardiomyopathy and arrhythmias are the leading cause of death in thalassemia patients due to iron deposition in cardiac tissue.
• Endocrine dysfunction includes diabetes mellitus, hypothyroidism, hypoparathyroidism, and delayed puberty from iron accumulation in endocrine glands.
• Hepatic fibrosis and cirrhosis develop from chronic iron overload, requiring regular monitoring of liver function tests and hepatic iron concentration.

Patient and Family Teaching

• Educate families about the lifelong nature of treatment and importance of compliance with transfusion and chelation therapy schedules.
• Teach recognition of infection signs as patients may have increased susceptibility due to splenomegaly and iron overload effects on immune function.
• Provide genetic counseling regarding 25% recurrence risk for future pregnancies when both parents are carriers.

Frequently Confused Concepts