Thalassemia Nursing Care Planning and Management Study Guide

Thalassemia is a chronic, inherited anemia, and most of your work is the long game: keep tissue oxygenated, manage the iron that transfusions dump into the body, protect the splenectomized child from infection, and carry the family through a lifelong condition. The defective hemoglobin is the medical problem. Transfusion dependence, iron overload, and adherence over years are the nursing problems.

What is Thalassemia?

Thalassemia is a group of inherited disorders of hemoglobin (Hb) synthesis, marked by deficient production of specific globin chains. Thalassemia major (Cooley's anemia) presents in childhood and is the most common form. It occurs often in people of Mediterranean descent but shows up in other populations too.

Pathophysiology

The defect is a reduced rate of production of one or more globin chains (α, β, γ, δ), which throws off Hb synthesis. The two chain types (α and non-α) normally pair at a ratio close to 1:1. When one chain is underproduced, the normally produced type accumulates as an unstable product inside the cell and destroys it. The thalassemia is named for the underproduced chain: β+ means β chains are produced at a lower rate, while β-0 means complete absence of β chain production from the involved allele.

Less Hb is deposited into each RBC, producing the classic hypochromic, microcytic picture. In the common β thalassemia trait, Hb A2 (δ2/α2) is usually elevated, and β thalassemia is mostly tied to a point mutation in the β globin gene. In the severe forms (β thalassemia major, Cooley anemia) the same mechanism is exaggerated: the large excess of free α chains destroys RBC precursors in the bone marrow.

Statistics and Incidences

Because of immigration and intermarriage over the years, all types of thalassemia now occur in any part of the United States, though until recently the number of patients with severe β and α forms was very limited. Finding more than 2-5 patients with the very severe forms in any pediatric hematology center is unusual, except at the few referral centers.

The interaction between Hb E (a β chain variant) and β thalassemia, both common among Southeast Asians, produced Hb E/β thalassemia, now believed to be the most common thalassemia disorder in many regions including coastal North America, replacing β thalassemia major in frequency. In California alone, 10-14 new cases of β thalassemia major and Hb E/β thalassemia, plus 40 cases of neonatal Hb H disease, are detected annually. Worldwide, 15 million people have clinically apparent thalassemic disorders, and carriers in India alone number approximately 30 million.

Clinical Manifestations

Onset is usually insidious and not recognized until the latter half of infancy. Watch for signs of anemia: unexplained fever, poor feeding, and a markedly enlarged spleen, particularly in a child of Mediterranean extraction. Fewer circulating RBCs delivering oxygen drives fatigue and pallor. The child may be irritable from discomfort, and anorexia is common.

Assessment and Diagnostic Findings

The CBC count and peripheral blood film are usually enough to suspect the diagnosis. Iron studies show an elevated serum iron level with saturation reaching as high as 80%; serum ferritin, used to monitor iron overload, is also elevated. A skeletal survey reveals the classic bone changes seen in patients who are not regularly transfused. ECG and echocardiography monitor cardiac function. HLA typing is done when bone marrow transplantation is considered.

Medical Management

Supportive therapy aims to maintain enough hemoglobin to prevent tissue hypoxia. Transfusions are the foundation: maintaining the child's hemoglobin level above 10 g/dL may require transfusions as often as every 2-4 weeks. Splenectomy is the principal surgical procedure for many patients. Bone marrow transplantation offers a possible cure for some children, using marrow from an unaffected sibling or a matched, unrelated donor.

A normal diet is recommended with emphasis on folic acid, small doses of ascorbic acid (vitamin C), and alpha-tocopherol (vitamin E). Do not give iron, and avoid iron-rich foods.

Pharmacologic Management

Medications are nonspecific and supportive. Antipyretics before transfusion prevent or reduce febrile reactions, and antihistamines before transfusion reduce allergic reactions. Chelating agents remove excess iron in patients with iron overload. For the local reaction some patients develop at the deferoxamine (DFO) injection site, hydrocortisone added to the DFO solution can reduce it, and certain antibacterial combinations are effective against organisms that infect iron-overloaded patients on DFO. Vitamin C, folic acid, and alpha-tocopherol serve as supplements or as enhancers of the chelating agent; serum vitamin C runs low in thalassemia major, likely from increased consumption under iron overload.

Splenectomized patients are prone to infection from encapsulated organisms (pneumococci, Haemophilus influenzae, meningococcal organisms), so immunize them 1-2 weeks before the procedure. Some patients respond to hydroxyurea and reduce or eliminate transfusion needs. Excessive chelation with deferoxamine can cause growth retardation; growth hormone may raise the growth rate, especially in patients with growth hormone deficiency.

Nursing Management

Nursing care is supportive and assessment-driven.

Nursing Assessment

In thalassemia major, assess for severe anemia, splenomegaly or hepatomegaly with abdominal enlargement, frequent infections, bleeding tendencies (such as epistaxis), and anorexia. In thalassemia intermedia, assess for anemia, jaundice, splenomegaly, and hemosiderosis from increased intestinal iron absorption. In thalassemia minor, expect mild anemia, usually without signs or symptoms.

Nursing Diagnoses

Based on the assessment data, major nursing diagnoses include ineffective tissue perfusion related to reduced cellular components needed to deliver oxygen; activity intolerance related to imbalance between oxygen supply and demand; imbalanced nutrition, less than body requirements, related to poor appetite; and ineffective family coping related to the disease's impact on family functioning.

Nursing Care Planning and Goals

The child will use energy conservation principles and report reduced fatigue with increased energy and ability to do desired activities. The child will understand the disease and treatment plan, carry a reduced infection risk (no fever, normal WBC count, preventive measures such as proper handwashing), maintain vital signs within normal limits, and carry a reduced bleeding risk (adequate platelet levels, no bruises or petechiae).

Nursing Interventions

Help the child plan and prioritize activities of daily living, build a schedule of activity and rest, and stress frequent rest periods. Explain the diagnostic procedures (CBC, bone marrow aspiration, possible hematology referral) and the functions of blood elements such as white cells, red cells, and platelets.

To prevent infection, assess for local or systemic signs (fever, chills, swelling, pain, malaise), keep the child away from people with active infections, avoid raw fruits, vegetables, and uncooked meat, and stress daily hygiene, mouth care, perineal care, and proper handwashing for the child and visitors. To prevent bleeding, assess for frank bleeding from the nose, gums, vagina, or urinary or GI tract, and monitor the platelet count.

Evaluation

Goals are met when the child or parent verbalizes use of energy conservation principles and understanding of the disease and treatment plan, reports reduced fatigue, and the child shows reduced infection risk (no fever, normal WBC count, preventive measures in place), vital signs within normal limits, and reduced bleeding risk (adequate platelets, no bruises or petechiae).

Documentation Guidelines

Document baseline and subsequent assessment findings including signs and symptoms; cultural or religious restrictions and personal preferences; the plan of care and persons involved; the teaching plan; the child's responses to teaching and interventions; attainment of or progress toward desired outcomes; and long-term needs with responsibility for actions to be taken.