NLE Paediatric Hematologic, Oncologic & Genetic Disorders — Summary

Super Tutor's review for Midwife Licensure Exam (as “Infant & Child Health (Growth, Development & IMCI)”) uses these same chapters, so they live here in the NLE section.

Paediatric Hematologic, Oncologic & Genetic Disorders - Summary

This chapter addresses the blood, cancer, and genetic disorders most frequently encountered in paediatric nursing practice and tested on the Philippine Nursing Licensure Examination (NLE). As a Filipino BSN graduate, understanding these conditions is essential for safe, evidence-based paediatric nursing care aligned with RA 9173 and Philippine healthcare delivery standards. The disorders covered—leukemia, hemophilia, sickle cell disease, thalassemia, iron-deficiency anemia, immune thrombocytopenic purpura (ITP), and Down syndrome—represent common paediatric presentations with significant morbidity and mortality if mismanaged. The chapter emphasizes the underlying pathophysiology, the nursing-process approach to prioritization (grounded in Maslow's hierarchy), and family-centered safety teaching. For each condition, infection prevention, bleeding precautions, or developmental support become critical nursing diagnoses that guide intervention selection. The content integrates the Philippine Newborn Screening Programme (RA 9288) and modern chemotherapy nursing care, ensuring relevance to the Philippine clinical context.

Key concepts

Acute Lymphoblastic Leukemia (ALL): Pathophysiology and Pancytopenia

Importance

Understanding pancytopenia is critical for nursing prioritization. Using Maslow's hierarchy, physiological safety (infection and bleeding prevention) supersedes all other needs in the neutropenic child. The nurse recognizes that fever in a neutropenic child is sepsis until proven otherwise and escalates care immediately. This concept directly underpins NLE test items on protective isolation, chemotherapy side-effect management, and family education.

ALL is the most common childhood cancer, with peak incidence at 2–5 years and a generally good prognosis with modern chemotherapy (80–90% 5-year survival in developed healthcare systems). The disease arises from uncontrolled proliferation of immature lymphoid cells (blasts) in the bone marrow. As blasts crowd out healthy blood cells, pancytopenia develops—the classic triad of consequences: (1) Anemia (low red blood cells) causing pallor, fatigue, and dyspnea; (2) Neutropenia (low functional white blood cells) causing infection risk—fever is often the ONLY sign of infection in the severely neutropenic child and is treated as a medical emergency; (3) Thrombocytopenia (low platelets) causing bleeding, petechiae, bruising, and spontaneous hemorrhage. Additional signs include bone/joint pain (from marrow expansion or leukostasis), hepatosplenomegaly, lymphadenopathy, and fever. Diagnosis is confirmed by bone marrow aspiration showing >20% blasts. Infection is the leading cause of death during induction therapy; thus, neutropenic precautions are the nursing priority.

Neutropenic Precautions and Infection Prevention in Chemotherapy

Importance

This is a HIGH-FREQUENCY NLE topic. Examiners consistently test knowledge of which foods are safe, which precautions are absolute contraindications (e.g., rectal temperatures), and how to educate families. The nursing diagnosis Risk for Infection is a priority NANDA diagnosis in all chemotherapy cases. Proper implementation prevents sepsis and death; improper implementation (e.g., giving a suppository or IM injection) can precipitate a life-threatening infection.

Neutropenic precautions are the cornerstone of protecting the child on chemotherapy from life-threatening infection. Key measures include: (1) Meticulous hand hygiene before any contact with the child; (2) Private (isolation) room with HEPA filtration where possible; (3) NO fresh flowers, plants, or fruits (harbour bacteria/fungi); (4) NO raw or uncooked foods (salmonella, E. coli risk); (5) Avoid crowds and visitors with any illness; (6) Monitor temperature Q4H and immediately report fever >38.5°C—fever is a medical emergency in neutropenia; (7) AVOID rectal temperatures, suppositories, IM injections, and invasive rectal procedures (these breach the mucosal barrier and introduce bacteria); (8) Use soft toothbrush and inspect mouth daily for mucositis/candidiasis; (9) Live vaccines are CONTRAINDICATED during immunosuppressive therapy. The nurse educates families that these precautions are not punitive but life-saving, and that the child can still engage in age-appropriate activities (e.g., supervised play, art) within the safe environment. The rationale—neutropenic children lack the WBCs to mount an immune response—should be clearly explained to the family.

Bleeding Precautions and Thrombocytopenia Management

Importance

Bleeding precautions are tested on the NLE as both safety measures and family-teaching points. The examiner expects the nurse to know why aspirin is contraindicated (platelet inhibition), why contact sports are forbidden, and how to counsel families on signs of bleeding. This is a Maslow safety/physiological need that the nurse must prioritize.

Thrombocytopenia develops as leukaemic blasts crowd out megakaryocytes in the bone marrow. Platelets drop, and the child's ability to clot is impaired. Bleeding precautions mirror neutropenic precautions in importance: (1) Soft toothbrush only; avoid hard toothpicks; inspect mouth daily for bleeding gums; (2) Avoid aspirin and NSAIDs—these inhibit platelet function and can precipitate life-threatening bleeding; use paracetamol for pain/fever; (3) NO contact sports or activities with collision risk; (4) Avoid IM injections and invasive procedures where possible; (5) Apply prolonged, gentle pressure to any bleeding site (e.g., nosebleed—pressure for 10–15 minutes); (6) Watch for signs of bleeding: petechiae, ecchymosis, haematuria, haemoptysis, melena; (7) Monitor platelet count—transfuse if <10,000–20,000/µL (protocol varies by institution) or if symptomatic bleeding. The nursing diagnosis Risk for Bleeding is a priority NANDA diagnosis. The nurse recognizes that a child with severe thrombocytopenia (platelets <5,000) is at risk for spontaneous intracranial hemorrhage and requires close monitoring and probable hospitalization.

Chemotherapy Side Effects and Nursing Management

Importance

This concept addresses the nursing diagnosis Nausea, Imbalanced Nutrition, Disturbed Body Image, and Risk for Peripheral Neuropathy—all high-frequency NLE topics in paediatric oncology. The examiner expects the nurse to know the timing of antiemetics, the management of mucositis, and the emotional support needed for alopecia. Family education on what to expect and how to manage at home is critical for treatment completion and adherence.

Children on chemotherapy experience predictable, often severe side effects that the nurse must manage proactively to promote adherence and quality of life. Key toxicities include: (1) Myelosuppression (neutropenia, thrombocytopenia, anemia)—managed with the neutropenic and bleeding precautions outlined above; transfusion for symptomatic anemia; colony-stimulating factors (G-CSF) may reduce neutropenic duration; (2) Nausea and vomiting—common with many chemotherapy agents; give antiemetics (e.g., ondansetron) 30 minutes BEFORE chemo, not after; small frequent bland meals; avoid strong odours and nausea triggers; (3) Mucositis (painful mouth ulcers)—rinse with normal saline or saline/soda solution Q2–4H; soft bland non-acidic foods (no citrus, spicy, hot foods); NO commercial alcohol-based mouthwash (irritates); assess for oral candidiasis and treat with antifungals; (4) Alopecia (hair loss)—reassure the child and family that hair WILL regrow after therapy (often within 3–6 months); offer scalp-cooling caps where available; suggest age-appropriate hats, scarves, or wigs; protect self-esteem; (5) Constipation—common with vincristine (a vinca alkaloid that causes peripheral neuropathy); ensure adequate hydration and fibre; use stool softeners/laxatives prophylactically; (6) Nutritional challenges—certain drugs increase appetite (corticosteroids) causing weight gain and mood changes; others cause taste changes; monitor weight and growth; use Down-syndrome-specific growth charts for children with comorbid conditions; (7) Peripheral neuropathy—vincristine commonly causes foot drop, weakness, and sensory changes; assess gait and function; modify activities; ensure safe environment. The nurse documents all side effects and reports severe or worsening symptoms to the oncology team for dose adjustment or supportive intervention.

Hemophilia: X-Linked Recessive Inheritance and Factor Deficiency

Importance

Hemophilia is a classic NLE topic testing inheritance patterns, laboratory interpretation, and acute management. The nurse must differentiate hemophilia (factor deficiency, prolonged aPTT) from ITP (thrombocytopenia, normal aPTT) or von Willebrand disease. Understanding X-linked recessive inheritance is essential for genetic counselling and identifying at-risk family members. The distinction between affected males and carrier females guides anticipatory counselling for mothers and daughters.

Hemophilia is an X-linked recessive bleeding disorder affecting males almost exclusively (with rare exceptions in females with Turner syndrome or homozygous carriers). The disease arises from deficiency of a clotting factor: Hemophilia A (Factor VIII deficiency—80–85% of cases) and Hemophilia B, also called 'Christmas disease' (Factor IX deficiency—15–20% of cases). Inheritance patterns are key to NLE family counselling: An affected male (X^h Y) has a 50% chance of passing the disorder to each son (who will be affected) and 100% chance of passing the carrier state to each daughter (who will usually be carriers but may show mild symptoms if lyonization favours the X^h chromosome). A carrier female (X^H X^h) has a 50% chance of having an affected son and a 50% chance of having a carrier daughter with each pregnancy. Hemophilia A carrier females may require Factor VIII supplementation during surgery or childbirth if their factor levels are low. The hallmark clinical feature is HEMARTHROSIS—spontaneous or traumatic bleeding into joints (elbows, knees, ankles), causing severe pain, swelling, warmth, and, over time, joint damage and chronic arthropathy. Also present: easy bruising after minor trauma, prolonged bleeding from cuts, spontaneous epistaxis, and GI bleeding. Laboratory findings show PROLONGED activated partial thromboplastin time (aPTT), but NORMAL platelet count, bleeding time, and PT—distinguishing hemophilia from thrombocytopenia or other coagulopathies.

Hemophilia Management: Factor Replacement and RICE for Acute Bleeding

Importance

This is a HIGH-YIELD NLE topic. Examiners test the nurse's ability to recognize a hemarthrosis (joint pain/swelling/warmth), initiate RICE, and educate families on when to use factor and how to access emergency care. The nursing diagnosis Acute Pain is central; effective pain management is essential for compliance with physiotherapy and prevention of contractures. Family education must include: avoid aspirin/NSAIDs (impair platelet function and mask bleeding); avoid IM injections and invasive procedures; use a soft toothbrush; provide a safe environment and protective gear (helmets, padding); encourage non-contact activities (swimming, cycling); wear medical-alert identification; seek care immediately for trauma or suspected bleeding.

The mainstay of hemophilia management is FACTOR REPLACEMENT—administering Factor VIII (for Hemophilia A) or Factor IX (for Hemophilia B) concentrates to restore clotting ability. Factor products are now derived from recombinant DNA technology (eliminating transfusion-transmitted infection risk from older plasma-derived products). DDAVP (desmopressin), a synthetic vasopressin analogue, can raise endogenous Factor VIII levels in mild Hemophilia A and von Willebrand disease, but is ineffective in Hemophilia B. For an acute joint bleed (hemarthrosis), the priority intervention is RICE: Rest (immobilize the joint to prevent further bleeding and pain), Ice (apply cold to reduce inflammation—but NOT prolonged contact to prevent tissue damage), Compression (gentle wrapping), and Elevation. These measures are combined with factor replacement as soon as possible (within 1–2 hours of symptom onset ideally, before irreversible joint damage occurs). The child is treated with analgesics (opioids for severe pain) and may need physiotherapy post-bleed to restore joint range of motion and prevent stiffness. Prophylactic factor infusions (2–3 times per week) are now standard in developed centres to prevent spontaneous bleeds and preserve joint integrity. Home-based factor infusion (self-administration or by a trained caregiver) allows children to live near-normal lives and respond immediately to early signs of bleeding.

Sickle Cell Disease: Autosomal Recessive HbS and Vaso-Occlusive Crisis

Importance

Sickle cell disease is a frequent NLE topic, particularly the recognition and management of vaso-occlusive crisis. The examiner expects the nurse to identify precipitating factors (dehydration, infection, cold, hypoxia) and implement the priority intervention: HHOP (see below). The nursing diagnosis Acute Pain, at risk for Infection, and Impaired Tissue Perfusion are priorities. Understanding the difference between the trait and the disease, and reassuring parents that trait carriers do not have the disease, is essential for accurate family counselling and reducing health anxiety.

Sickle cell disease is an autosomal recessive haemoglobinopathy characterized by production of abnormal haemoglobin S (HbS). In the homozygous state (SS genotype), both alleles produce HbS; under conditions of stress (hypoxia, dehydration, infection, cold, acidosis), HbS polymerizes, causing red blood cells to sickle or assume a rigid, curved shape. These sickled RBCs clump together, obstruct blood vessels, and cause tissue ischaemia, infarction, and pain. The sickle cell trait (heterozygous AS genotype) offers malaria resistance and is common in populations of African descent; trait carriers usually do NOT experience vaso-occlusive crises under normal circumstances, though they may sickling under extreme hypoxia (e.g., high altitude, strenuous exertion without adequate conditioning). The most common acute complication is a VASO-OCCLUSIVE (PAINFUL) CRISIS—characterized by acute ischaemic pain in the extremities, abdomen, back, or chest, often accompanied by swelling of hands/feet (dactylitis, especially in young children), fever, and elevated white blood cell count. Severe pain may last hours to days and requires aggressive opioid analgesia. Other crises include: Sequestration crisis (sudden trapping of sickled cells in the spleen, causing acute splenic enlargement, drop in hemoglobin, and hypovolemic shock—a medical emergency); Aplastic crisis (sudden cessation of RBC production, often preceded by parvovirus B19 infection); Acute chest syndrome (chest pain, respiratory distress, infiltrate on X-ray—often mistaken for pneumonia, but caused by sickled RBCs in the pulmonary vasculature). Chronic complications include bone infarction (avascular necrosis), stroke, kidney damage, priapism, and pulmonary hypertension.

Sickle Cell Disease Management: HHOP (Hydration, Heat, Oxygen, Pain Control)

Importance

This is a HIGH-FREQUENCY NLE topic. The examiner often presents a vignette of a child with sickle cell disease presenting with severe leg/abdominal pain and tests the nurse's ability to recognize the crisis, implement HHOP, and educate the family on prevention. Critical teaching points include: avoid hypoxia (high altitude, strenuous exertion), dehydration (keep well hydrated, especially in hot weather), cold exposure (never expose to cold), and infection (stay current on immunizations, seek care early for fever). The nurse must emphasize that NEVER applying cold is a key safety point, as some families mistakenly use ice thinking it will relieve pain. The nursing diagnosis Acute Pain, Impaired Gas Exchange (if chest syndrome), and Risk for Infection are priorities.

The PRIORITY management of acute vaso-occlusive crisis is HHOP—a memory aid for evidence-based interventions: (1) Hydration—administer IV fluids (normal saline) to rehydrate and improve blood viscosity; dehydration concentrates HbS and promotes sickling; oral fluids if tolerated, but IV fluids are preferred in crisis; maintain urine output 1–1.5 mL/kg/hr; (2) Heat—apply warmth (heating pads, blankets) to affected areas; heat promotes vasodilation and reduces ischaemia; NEVER apply cold (cold promotes vasoconstriction and sickling—a critical teaching point for families); (3) Oxygen—supplemental oxygen if SpO2 <95% or if respiratory symptoms present; oxygen reduces the PaO2 and reduces the tendency for HbS to polymerize (though in normoxic states, supplemental oxygen may not provide additional benefit); (4) Pain control—aggressive opioid analgesia (morphine, hydromorphone) given PRN or on a regular schedule during crisis; do NOT undertreat pain (undertreatment is a common error); adjuncts include non-opioid analgesics, heat, and distraction techniques. Additional supportive measures include rest, treating concurrent infection with antibiotics if present, and monitoring for complications (chest syndrome, sequestration). HYDROXYUREA, a cytotoxic agent, increases fetal hemoglobin (HbF), which does NOT polymerize; this reduces the frequency and severity of vaso-occlusive crises by 50% in many children and is now standard preventive therapy. Families must understand that HHOP applies to any painful crisis and that early recognition and rapid transport to hospital is critical for pain relief and prevention of organ damage.

Thalassemia Major (Cooley's Anemia): Pathophysiology and Transfusion Dependence

Importance

Thalassaemia major is tested on the NLE as a chronic transfusion-dependent condition requiring multidisciplinary management. The nurse must understand the pathophysiology (deficient beta-globin → haemolysis → anaemia → transfusion dependence → iron overload) and the complications that arise from chronic transfusions. The nursing diagnoses Ineffective Tissue Perfusion (from anaemia), Risk for Iron Overload, and Anxiety are priorities. The nurse is expected to educate families on the need for lifelong transfusions, the signs of iron overload (fatigue, joint pain, palpitations, abdominal pain), and the importance of chelation therapy to prevent organ damage.

Beta-thalassemia is an autosomal recessive disorder of haemoglobin synthesis caused by deficient production of beta-globin chains. In the severe form, THALASSEMIA MAJOR (Cooley's anemia), both beta-globin alleles are defective, resulting in profound reduction or absence of beta-globin production. Without adequate beta chains, alpha-globin chains precipitate, damage RBC membranes, and cause haemolysis. The result is severe, microcytic, hypochromic anaemia presenting in infancy (after foetal haemoglobin declines), with haemoglobin levels often <7 g/dL at diagnosis. Clinical features include: severe pallor, failure to thrive, hepatosplenomegaly (from extramedullary haematopoiesis and haemolysis), and characteristic bone changes from marked marrow expansion—frontal bossing of the skull, maxillary prominence (giving a 'chipmunk' facies), and widening of long bones. Thalassaemia intermedia is a milder form with some residual beta-globin production; affected children may not require regular transfusions early in life. The primary management of thalassaemia major is REGULAR BLOOD TRANSFUSIONS to maintain haemoglobin at a target level (typically 9–10 g/dL) that allows growth, development, and reduction of extramedullary haematopoiesis. However, each unit of transfused blood contains ~250 mg iron; repeated transfusions over years lead to IRON OVERLOAD (hemosiderosis/hemochromatosis), which deposits iron in the heart (cardiomyopathy), liver (cirrhosis), pancreas (diabetes), pituitary (hypogonadism), and thyroid (hypothyroidism). Iron overload is now the leading cause of death in thalassaemia major patients.

Iron Overload in Thalassaemia and Chelation Therapy

Importance

Iron overload and chelation are HIGH-YIELD NLE topics, especially for children with thalassaemia or chronic transfusions. The examiner expects the nurse to know: (1) the mechanism of iron overload (transfusions + no excretion), (2) the complications (cardiomyopathy, cirrhosis, diabetes, hypogonadism), (3) screening methods (ferritin, MRI, echocardiography), and (4) chelation agents (deferoxamine parenteral vs. deferasirox oral) and their administration. Family education must emphasize adherence to chelation despite side effects, regular monitoring, and the importance of preventing rather than treating overload. This directly impacts the child's long-term quality of life and survival.

Iron overload (hemosiderosis/hemochromatosis) develops insidiously in children receiving chronic transfusions for thalassaemia major. Each unit of blood transfused contains ~250 mg iron with NO physiological mechanism for excretion (the body absorbs iron but cannot excrete excess). Over 5–10 years of transfusion, total body iron burden accumulates to levels (>5–10 g) that exceed the body's ability to safely store it. Excess iron deposits in myocardium (causing arrhythmias, heart failure), hepatocytes (causing fibrosis and cirrhosis), pancreatic beta cells (causing diabetes), pituitary gonadotropes (causing hypogonadism and delayed puberty), thyroid (causing hypothyroidism), and joints (causing arthralgia). Iron also generates reactive oxygen species, accelerating organ damage. Screening for iron overload includes: serum ferritin (though an acute-phase reactant, chronically elevated ferritin >1000–1500 ng/mL suggests overload), liver and cardiac MRI (quantifies iron in organs), cardiac echocardiography (assesses ventricular function), and regular endocrine screening (HbA1c, thyroid function, gonadal hormones). CHELATION THERAPY is the primary intervention to prevent organ damage by binding and promoting excretion of excess iron. Two main agents are used: (1) DEFEROXAMINE (Desferal)—a parenteral iron chelator given as nightly subcutaneous or IV infusion (40–50 mg/kg/day); requires an infusion pump and patient/family education but is highly effective at reducing iron burden; side effects include pain at injection site and, rarely, retinal/cochlear toxicity with prolonged use; (2) DEFERASIROX (Exjade)—an oral iron chelator (once-daily tablet, ~20–30 mg/kg/day) that is more convenient and has better adherence; side effects include GI upset, rash, and transient serum creatinine elevation (monitor renal function). Combination chelation (deferasirox + deferoxamine) may be used in heavily iron-loaded patients. The nurse educates families that chelation must be given REGULARLY (not just when ferritin rises), as preventing overload is far more effective than trying to reverse it after organ damage has occurred. The nursing diagnosis Risk for Injury (from iron toxicity) and Deficient Knowledge are priorities.

Iron-Deficiency Anaemia: Most Common Nutritional Anaemia in Children

Importance

Iron-deficiency anaemia is a very HIGH-FREQUENCY NLE topic because it is so common in paediatric practice, especially in the Philippines. The examiner expects the nurse to: (1) recognize risk factors and identify at-risk children, (2) interpret laboratory findings, (3) safely administer and educate families on oral iron supplementation, and (4) provide prevention counselling aligned with Philippines nutrition programmes. This is a Maslow safety/physiological need (oxygenation) that affects growth and development. The nursing diagnoses Ineffective Tissue Perfusion, Imbalanced Nutrition, and Fatigue are priorities.

Iron-deficiency anaemia is the MOST COMMON NUTRITIONAL DEFICIENCY in children worldwide, particularly in low- and middle-income countries like the Philippines. It peaks in two age groups: (1) Infants and toddlers (6 months–2 years)—during a period of rapid growth and development when iron demand exceeds intake, especially if dietary iron is inadequate (e.g., early cow's milk introduction, limited complementary foods rich in iron, delayed cord clamping not practised); (2) Adolescents (especially menstruating females)—when rapid growth and in females, blood loss from menstruation increase iron demand. In the Philippine context, risk factors include: early introduction of whole cow's milk (before 12 months), displacement of iron-rich foods by milk ('milk baby syndrome'), low dietary iron intake (rice-based diet low in meat/legumes), increased parasitic infections (hookworm), and poor antenatal iron supplementation (affecting maternal stores passed to infant). Clinical signs include: pallor (palms, conjunctivae), fatigue, irritability, poor feeding, tachycardia, and in severe cases, heart failure and developmental delay (iron is essential for myelination and cognition). Laboratory findings show: microcytic (small RBC), hypochromic (low haemoglobin content) red cells with elevated RDW (red cell distribution width), low serum ferritin (<12 ng/mL), elevated TIBC (total iron-binding capacity), and low serum iron. The Hb may range from mild (10–11 g/dL) to severe (<7 g/dL).

Iron Supplementation: Safe Administration and Family Education

Importance

This is a CRITICAL NLE topic because iron supplementation in children is a common nursing task, and improper administration (e.g., giving with milk, staining teeth, not explaining dark stools) leads to non-adherence and treatment failure. The examiner frequently tests: (1) the correct dose calculation (elemental iron 3–6 mg/kg/day), (2) the reason for giving with vitamin C (enhances absorption), (3) why NOT to give with milk (inhibits absorption), (4) why to use a straw and brush teeth (prevent staining), (5) why dark stools are normal (reduce anxiety), (6) management of constipation (proactive stool softeners), and (7) safety of iron (ACCIDENTAL IRON POISONING IS A LEADING CAUSE OF POISONING DEATH IN YOUNG CHILDREN—iron bottles MUST be KEPT LOCKED AWAY). The nursing diagnosis Risk for Poisoning, Imbalanced Nutrition, and Deficient Knowledge are priorities. Family education must be thorough and include written instructions, as oral iron regimens in toddlers require high caregiver competence.

ORAL IRON is the first-line treatment for iron-deficiency anaemia in children. The recommended dose is 3–6 mg/kg/day of ELEMENTAL IRON (not ferrous salt), typically given as ferrous sulfate, ferrous gluconate, or ferrous fumarate. The iron must be calculated by the elementary iron content; for example, ferrous sulfate 300 mg contains ~60 mg elemental iron. Optimally, iron is given BETWEEN MEALS or on an empty stomach for maximum absorption. However, GI side effects (nausea, abdominal discomfort, constipation, darkening of stools) may reduce adherence, especially in toddlers. To enhance absorption, give iron WITH VITAMIN C (ascorbic acid)—a glass of orange juice or citrus juice increases iron absorption by 3–4-fold; this is a high-yield teaching point. AVOID giving iron WITH MILK, calcium, tea, or coffee, as these inhibit absorption by forming complexes. Iron should be given in DIVIDED DOSES (e.g., twice daily) to improve tolerability. For liquid iron formulations, ALWAYS use a dropper or straw and direct the liquid to the BACK OF THE MOUTH, avoiding contact with teeth, because liquid iron STAINS TEETH BROWN/BLACK (a cosmetic concern that reduces family acceptance). After administration, the child should brush teeth. The family should EXPECT DARK/TARRY-BLACK STOOLS (melena-like appearance) from unabsorbed iron—this is normal and reassuring them prevents unnecessary alarm and emergency department visits. CONSTIPATION is very common and should be managed proactively with stool softeners, increased fluids, and fibre. The response to iron takes weeks: reticulocyte count rises in 3–5 days, and haemoglobin rises by 1 g/dL every 2–3 weeks with good adherence. The family should be counselled that the child will feel better (less fatigued, more energetic) within 1–2 weeks, which improves adherence. Iron supplementation is typically continued for 3–6 months after haemoglobin normalizes to replete body iron stores. Parenteral iron (iron dextran IM/IV) is rarely used in children due to risk of anaphylaxis and pain, and is reserved for cases of severe malabsorption or non-adherence to oral iron.

Iron Poisoning Prevention and Acute Management

Importance

Iron poisoning prevention is a CRITICAL SAFETY teaching point on the NLE. Examiners often ask about safe storage, early signs of poisoning, and the family's role in prevention. The nurse must emphasize lock-and-key storage with the same urgency as firearms or medications, because parents may underestimate the danger of 'just vitamins.' This is a core nursing responsibility under RA 9173—health promotion and injury prevention. The nursing diagnosis Risk for Poisoning must be addressed with every family starting an iron-supplemented child on therapy.

Accidental iron poisoning from iron supplements is a serious threat in young children (peak age 1–3 years) who can access unsecured iron bottles. Iron is toxic in large doses; as little as 20 mg/kg of elemental iron can cause serious toxicity, and >60 mg/kg is potentially fatal. Toxicity occurs in phases: (1) Phase 1 (0.5–6 hours)—GI irritation causing vomiting (often haematemesis—vomiting blood), abdominal pain, diarrhoea, and melena; (2) Phase 2 (6–24 hours)—apparent improvement ('honeymoon period'), deceptive stability; (3) Phase 3 (24–48+ hours)—cardiovascular collapse, metabolic acidosis, seizures, coma, and multi-organ failure. The mechanism of iron toxicity is that free iron generates reactive oxygen species and directly damages the GI mucosa and systemic vasculature. Management of suspected iron poisoning includes: (1) immediate contact with poison control or transport to emergency department, (2) measurement of serum iron level at 4–6 hours post-ingestion to determine severity, (3) abdominal X-ray (iron is radiopaque and may be visualized), (4) supportive care (IV fluids, correction of acidosis with sodium bicarbonate), and (5) CHELATION THERAPY with deferoxamine—a specific antidote that binds iron and promotes urinary/biliary excretion; deferoxamine is given IV or IM; urine may turn orange ('iced tea' urine) when iron is being excreted. The prognosis depends on the amount ingested and time to treatment; early aggressive management significantly improves outcomes. PREVENTION is paramount: families are educated to KEEP IRON BOTTLES AND ALL MEDICATIONS LOCKED AWAY, out of children's reach, and to NEVER call iron 'candy' or use deceptive language. Even a small number of adult iron supplements (e.g., pregnant mother's prenatal vitamins) can be fatal to a toddler.

Immune Thrombocytopenic Purpura (ITP): Autoimmune Thrombocytopenia

Importance

ITP is frequently tested on the NLE as a classic example of isolated thrombocytopenia and as a differential diagnosis for other bleeding disorders. The examiner expects the nurse to: (1) differentiate ITP (isolated low platelets, well-appearing child) from leukemia (pancytopenia, ill child); (2) recognize that the low platelet count does NOT reflect disease severity (some children with ITP have severe thrombocytopenia but minimal bleeding, while others bleed with higher counts—this reflects immune modulation); (3) implement bleeding precautions; and (4) educate families on activity restrictions and when to seek emergency care (severe headache, changes in consciousness). The nursing diagnoses Risk for Bleeding and Anxiety are priorities. Many children with acute ITP recover spontaneously within weeks to months as immune tolerance is restored; the role of the nurse is to prevent catastrophic bleeding during this time.

ITP is an acquired autoimmune disorder in which the body produces antibodies against its own platelets, leading to excessive destruction in the spleen and, to a lesser extent, the liver. The result is ISOLATED THROMBOCYTOPENIA—platelets are low (often <30,000/µL or <20,000/µL), but white blood cell count and haemoglobin are NORMAL (distinguishing ITP from leukemia or other pancytopenic conditions). ITP commonly follows a viral illness (varicella, measles, EBV, etc.) in an otherwise well child—the virus may expose hidden platelet antigens or molecular mimicry may trigger cross-reactive antibodies. Acute ITP typically presents with a 1–2 week history of petechiae, purpura (purple/red blotches), easy bruising, and sometimes epistaxis or gum bleeding. The child often LOOKS WELL despite the low platelet count—this is a key distinguishing feature from leukemia, where the child appears ill and has other signs of pancytopenia. Chronic ITP (>6 months duration) is less common in children but carries a risk of intracranial hemorrhage or other serious bleeding. Laboratory findings show: severely low platelet count (often <10,000–50,000/µL), normal RBC and WBC counts, normal coagulation studies (PT, aPTT, fibrinogen), and negative direct antiglobulin test (Coombs')—RBCs are not affected. Bone marrow aspiration (if done) shows NORMAL or INCREASED megakaryocytes (the marrow is trying hard to produce platelets but they are being destroyed faster than they can be made).

ITP Management: Observation, Corticosteroids, and Activity Restriction

Importance

ITP management is a HIGH-FREQUENCY NLE topic, particularly the distinction between observation (for asymptomatic thrombocytopenia) and active treatment (corticosteroids, IVIG, anti-D for symptomatic/severe cases). The examiner tests: (1) recognition of ITP as an autoimmune condition with isolated thrombocytopenia, (2) the rationale for each treatment (steroids suppress immunity, IVIG blocks Fc receptors, anti-D 'occupies' macrophages), (3) bleeding precautions, and (4) when to consider splenectomy (chronic refractory ITP). The nursing diagnosis Risk for Bleeding, Deficient Knowledge, and Anxiety are priorities. Family education must address: activity restrictions (no contact sports BUT age-appropriate non-contact activities are encouraged—isolation itself is harmful), signs of serious bleeding (severe headache, loss of consciousness, abdominal pain), and the expected recovery trajectory (many children recover spontaneously within months).

Management of ITP depends on the severity of thrombocytopenia and presence of bleeding symptoms. For ASYMPTOMATIC children with platelet counts >30,000/µL (lower risk of spontaneous serious bleeding), observation and activity restriction (no contact sports, no aspirin/NSAIDs) may be sufficient, as spontaneous recovery is likely. For SYMPTOMATIC children or those with severe thrombocytopenia (<10,000/µL, especially with signs of bleeding), treatment includes: (1) CORTICOSTEROIDS—prednisone or prednisolone 1–2 mg/kg/day PO (for 2–4 weeks, then taper) or methylprednisolone 30 mg/kg/day IV for 3 days; steroids suppress the immune response and reduce platelet destruction; response is often seen within days; (2) IVIG (intravenous immunoglobulin)—2 g/kg IV, given as a single dose or divided over 3–5 days; mechanism is unclear but may involve blockade of Fc receptors on splenic macrophages, preventing platelet destruction; expensive but can raise platelets rapidly (within 24–48 hours) and is used when urgent platelet elevation is needed (e.g., before surgery); (3) ANTI-D (RhoGAM, an IgG antibody against the Rh D antigen on RBCs)—given to Rh-positive children; anti-D binds to RBCs, causing mild haemolysis and 'occupying' splenic macrophage receptors that would otherwise destroy platelets; effective in raising platelets within 24–48 hours; less expensive than IVIG. BLEEDING PRECAUTIONS are implemented: soft toothbrush, avoid aspirin/NSAIDs, avoid IM injections and invasive procedures, avoid contact sports, helmet/padding for high-risk activities, monitor for signs of bleeding (haematuria, melena, severe headache suggesting intracranial hemorrhage). SPLENECTOMY (removal of the spleen) is considered in CHRONIC ITP (>6 months) that is refractory to medical management; if successful, ~70% of children have long-term remission. Prophylactic antibiotics and vaccinations (against splenectomy-induced infection risk) are given post-splenectomy.

Down Syndrome (Trisomy 21): Chromosomal Abnormality and Associated Features

Importance

Down syndrome is the MOST FREQUENTLY tested genetic disorder on the NLE. The examiner expects the nurse to: (1) recognize the physical features (hypotonia, upslanting eyes, protruding tongue, single palmar crease); (2) identify associated congenital anomalies and screen for them (see below); (3) manage feeding challenges from hypotonia and small oral cavity; (4) support development through early intervention; and (5) provide family-centered care and genetic counselling. This is a cornerstone topic for paediatric nursing. The nursing diagnoses Imbalanced Nutrition (related to feeding difficulties), Delayed Growth and Development, Risk for Infection, and Deficient Knowledge (for families) are priorities.

Down syndrome is the most common chromosomal disorder causing intellectual disability, arising from the presence of THREE copies of chromosome 21 (instead of the typical two). Most cases (95%) result from nondisjunction during meiosis—a random event unrelated to parental carrier status—resulting in TRISOMY 21 in all body cells. Approximately 3–4% of cases arise from a Robertsonian translocation in which the long arm of chromosome 21 is attached to another chromosome (often 14), and 1% are mosaics (some cells with trisomy, others with normal karyotype; mosaics typically have milder features). ADVANCED MATERNAL AGE is a significant risk factor: at age 20, the risk is ~1/1500; at age 35, ~1/385; at age 45, ~1/30. Prenatal screening (first-trimester combined screening including nuchal translucency ultrasound + maternal serum alpha-fetoprotein + human chorionic gonadotropin, or non-invasive prenatal testing/NIPT using fetal DNA in maternal blood) can identify pregnancies at high risk; diagnostic confirmation requires karyotyping or fluorescence in situ hybridization (FISH). The hallmark CLINICAL FEATURES of Down syndrome include: (1) HYPOTONIA—the classic 'floppy baby'; marked low muscle tone from infancy; (2) Characteristic facial features—UPWARD-SLANTING PALPEBRAL FISSURES (eyes slanted upward at the outer corners) with EPICANTHAL FOLDS (skin folds at the inner corners of the eyes); flat facial profile with low nasal bridge; short, broad nose; (3) PROTRUDING TONGUE due to a SMALL ORAL CAVITY—the tongue appears enlarged but is normal size relative to the small mouth; (4) Short, broad neck with excess nuchal skin (seen as a thickened nuchal fold on prenatal ultrasound); (5) SINGLE TRANSVERSE PALMAR (SIMIAN) CREASE—a crease running across the entire palm (present in ~45% of Down syndrome, but can be seen in unaffected individuals); (6) WIDE GAP BETWEEN THE FIRST AND SECOND TOES (sandal gap). Other features include: low-set ears, conductive hearing loss (fluid in middle ear), refractive errors and vision problems, short stature, and developmental delay (intellectual disability varies widely, with IQ typically 30–70).

Down Syndrome: Associated Congenital Anomalies and Screening

Importance

Screening for congenital anomalies is a CRITICAL nursing responsibility in Down syndrome. The NLE examiner expects the nurse to: (1) recognize when duodenal atresia is suspected (newborn with bilious vomiting, 'double-bubble' on X-ray) and notify the physician immediately, (2) understand the importance of early echocardiography (even asymptomatic AV canal defects can deteriorate), (3) arrange audiological and ophthalmological evaluations, (4) explain to families why these screens are necessary (early detection prevents complications and improves outcomes), and (5) provide anticipatory guidance on atlantoaxial instability (sports restrictions). This addresses the nursing diagnosis Risk for Impaired Tissue Perfusion (if undetected heart defect), Impaired Hearing, Impaired Vision, and Anxiety (for families). The comprehensive screening and early intervention prevent disability and death in Down syndrome.

Children with Down syndrome have a VERY HIGH incidence of associated congenital anomalies requiring vigilant screening and early intervention to prevent complications and death. The most critical are: (1) CONGENITAL HEART DEFECTS—present in ~40–50% of Down syndrome cases; the most common are ATRIOVENTRICULAR (AV) CANAL DEFECTS (also called endocardial cushion defects, ~40% of cardiac defects in Down syndrome), which involve defects in the endocardial cushions with resulting ASD (atrial septal defect), VSD (ventricular septal defect), and/or mitral/tricuspid valve abnormalities; other lesions include simple VSD, PDA, and tetralogy of Fallot; screening is done with newborn physical examination (listen for murmur), chest X-ray, and ECHOCARDIOGRAPHY (gold standard for diagnosis); early cardiology referral is essential as some lesions require surgical correction to prevent heart failure and failure to thrive; (2) GI ANOMALIES—duodenal atresia (~1 in 300 Down syndrome, vs. ~1 in 10,000 general population) causes complete obstruction of the duodenum, presenting with bilious vomiting and abdominal distension within hours of birth; diagnosed by abdominal X-ray showing the classic 'double-bubble' sign (gas in the stomach and proximal duodenum with none distally); requires urgent surgical repair; Hirschsprung disease (~1 in 100 Down syndrome) presents with failure to pass meconium, abdominal distension, and enterocolitis; IMPERFORATE ANUS is also increased; (3) HYPOTHYROIDISM—present in ~5–10% of Down syndrome (higher than general population); screen with TSH/free T4 at birth and periodically thereafter; (4) HEARING LOSS—conductive hearing loss from fluid in the middle ear is very common (~60–80%); sensorineural hearing loss can also occur; audiological evaluation is essential in early infancy to permit timely hearing aid fitting or cochlear implant consideration, as hearing is critical for speech and language development; (5) VISION PROBLEMS—refractive errors (myopia, hyperopia, astigmatism), strabismus, nystagmus, and cataracts are common; early ophthalmological screening ensures correction and prevents amblyopia (lazy eye); (6) ATLANTOAXIAL INSTABILITY—ligamentous laxity of the atlantoaxial joint (between C1 and C2 vertebrae) occurs in ~10–15% of Down syndrome; risk of subluxation and spinal cord compression during neck flexion; radiographic screening (lateral neck X-ray with flexion/extension views) is recommended; precautions include avoiding aggressive neck flexion and restricting participation in contact sports, gymnastics, and swimming with head submersion; (7) INCREASED RISK OF LEUKEMIA—ALL is ~20 times more common in Down syndrome; acute megakaryoblastic leukemia (AML-M7) is a rare but specific subtype; annual CBC monitoring is recommended; (8) IMMUNODEFICIENCY—T-cell defects and thymic hypoplasia increase infection risk; aggressive treatment of infections and up-to-date immunizations (with live vaccines given carefully post-infancy) are important.

Down Syndrome Nursing Care: Feeding, Development, and Family Support

Importance

Down syndrome nursing care is tested extensively on the NLE, particularly the feeding challenges, developmental milestones, and family support. The examiner expects the nurse to: (1) explain why the child has feeding difficulties (hypotonia + small oral cavity), (2) provide safe feeding techniques (slow, careful, supported positioning), (3) understand why early intervention is crucial (improves motor, language, and cognitive outcomes), and (4) demonstrate compassionate family-centered care (non-judgmental, supportive, strength-based). The nursing diagnoses Imbalanced Nutrition (less than body requirements), Delayed Growth and Development, and Anxiety (family) are core to Down syndrome management. The nurse's role in feeding assessment, early referral, and family support directly impacts the child's development and the family's well-being.

Nursing management of the child with Down syndrome focuses on three pillars: (1) FEEDING AND NUTRITION—hypotonia and the small oral cavity with protruding tongue make feeding very difficult; the infant has poor suck, weak swallow, and increased aspiration risk; nursing interventions include: SUPPORT THE HEAD AND NECK firmly (hypotonia requires external support); feed SLOWLY and CAREFULLY, allowing the child to swallow between spoonfuls; use INFANT-PACED feeding (wait for the infant's cues, not parent-paced); position upright or semi-upright for feeding and keep upright for 30 minutes post-feed to prevent aspiration; offer thickened liquids if swallow dysfunction is present; monitor for aspiration (cough, choking, respiratory symptoms); if feeding is severely impaired, consider nasogastric (NG) tube feeding temporarily, though oral feeding is preferable for development of feeding skills; monitor weight and growth on Down-syndrome-specific growth charts (general pediatric growth charts underestimate expected growth in Down syndrome due to genetic shorter stature); (2) EARLY INTERVENTION AND DEVELOPMENTAL SUPPORT—Down syndrome causes developmental delay; early intervention programs (physical therapy, occupational therapy, speech-language pathology) starting in infancy significantly improve outcomes; PT addresses hypotonia and improves motor milestones; OT supports self-feeding, self-care skills; SLP supports language and communication; parents are trained to incorporate therapy into daily routines (e.g., practicing mouth closure during feeding, encouraging reaching movements during play); realistic developmental expectations and celebration of progress, even if delayed, support family morale; (3) FAMILY-CENTERED CARE AND SUPPORT—a diagnosis of Down syndrome can be emotionally overwhelming; the nurse provides compassionate, non-directive genetic counselling (explains the condition, recurrence risk, and support resources without implying 'rightness' or 'wrongness' of any decision); connects the family with Down syndrome societies, support groups, and early intervention services; addresses parental grief and anxiety; emphasizes the WHOLE CHILD (personality, strengths, potential) not just the diagnosis; encourages bonding and normal parenting; provides written materials in the family's preferred language; arranges follow-up appointments for screening and specialty care. PROGNOSIS has improved dramatically: many children with Down syndrome now attend mainstream schools, develop social skills, and achieve varying degrees of independence; life expectancy has increased to >50 years with modern healthcare (compared to <10 years in the pre-modern era).

Inheritance Patterns: Autosomal Recessive, X-Linked Recessive, and Chromosomal

Importance

Inheritance patterns are a CORNERSTONE of NLE genetics questions. The examiner frequently tests: (1) Punnett square interpretation for autosomal recessive (carrier × carrier = 25% affected), (2) X-linked recessive pedigree analysis (affected males, carrier females, pattern of male-to-male transmission is IMPOSSIBLE in X-linked conditions because males give their Y to sons), (3) recurrence risk estimation for Down syndrome (depends on maternal age and parental carrier status in translocation cases), and (4) the nurse's role in non-directive genetic counselling (explains risks without implying value judgments). Understanding these patterns allows the nurse to: identify at-risk siblings, explain to families why genetic screening or prenatal diagnosis may be offered, counsel parents on future pregnancy risks, and make referrals to genetic counselling services. This is fundamental to RA 9173-compliant nursing practice.

Understanding inheritance patterns is essential for genetic counselling and risk assessment in paediatric nursing. There are three primary patterns relevant to this chapter: (1) AUTOSOMAL RECESSIVE—the gene is located on a non-sex chromosome (autosomes 1–22); a person needs to inherit TWO copies of the recessive allele (one from each parent) to be affected. Both parents are CARRIERS (heterozygous, with one normal and one mutant allele); they are typically unaffected because one normal allele is sufficient for normal function. When two carrier parents have children: 25% are AFFECTED (homozygous recessive), 50% are CARRIERS (heterozygous), and 25% are UNAFFECTED (homozygous normal). Examples in this chapter: SICKLE CELL DISEASE (HbS gene on chromosome 11), THALASSEMIA (beta-globin gene on chromosome 11), PHENYLKETONURIA/PKU (phenylalanine hydroxylase gene), CYSTIC FIBROSIS (CFTR gene). Autosomal recessive conditions are equally likely in males and females. (2) X-LINKED RECESSIVE—the gene is located on the X chromosome; males (XY) are affected if they inherit ONE mutant copy (they have no second X to 'cover' the defect); females (XX) are usually CARRIERS (heterozygous) and unaffected, but can be affected if they inherit two mutant copies (rare) or if lyonization (random X-inactivation) favours the mutant X. When an AFFECTED MALE (X^a Y) has children: ALL daughters are CARRIERS (X^A X^a) because they inherit his X^a and their mother's normal X; ALL sons are UNAFFECTED (X^A Y) because they inherit his normal Y and their mother's X^A (assuming the mother is not a carrier). When a CARRIER FEMALE (X^A X^a) has children: 50% of sons are AFFECTED (X^a Y) and 50% are UNAFFECTED (X^A Y); 50% of daughters are CARRIERS (X^A X^a) and 50% are UNAFFECTED (X^A X^A). Examples in this chapter: HEMOPHILIA A (Factor VIII gene), HEMOPHILIA B (Factor IX gene), G6PD DEFICIENCY. X-linked recessive conditions predominantly affect males; affected females are rare. (3) CHROMOSOMAL—involves abnormal number or structure of entire chromosomes. NUMERICAL ABNORMALITIES: Trisomy (three copies of a chromosome) or monosomy (one copy). DOWN SYNDROME (TRISOMY 21) is the most common—arises from nondisjunction during meiosis (random event, not inherited), so RECURRENCE RISK is ~1% plus maternal age-related risk (e.g., at age 35, baseline risk is ~1/385 plus ~1% = ~1/350). Risk increases exponentially with advancing maternal age. Translocation Down syndrome (~3–4% of cases) can be inherited if one parent is a carrier of a Robertsonian translocation, but most cases are sporadic. STRUCTURAL ABNORMALITIES: deletion, duplication, inversion, or translocation of chromosome segments.

Philippine Newborn Screening Programme (RA 9288) and Early Detection

Importance

The Philippine Newborn Screening Programme is a HIGH-FREQUENCY NLE topic, especially for conditions like PKU and G6PD deficiency. The examiner expects the nurse to: (1) know the conditions screened and why (early detection prevents disability), (2) understand the timing of the heel-prick (24–72 hours after birth, ideally after feeding), (3) recognize when a positive screen requires confirmation and specialist referral, and (4) provide education to families on the importance of screening and lifestyle modifications (e.g., G6PD: avoid fava beans and sulfa drugs). This aligns with RA 9173's emphasis on health promotion and disease prevention. The nursing diagnosis Risk for Delayed Development, Deficient Knowledge (family), and Anxiety are priorities when managing newborn screening results.

The PHILIPPINE NEWBORN SCREENING PROGRAM (mandated by RA 9288, Newborn Screening Law) is a critical public health initiative that screens every newborn for a panel of conditions detectable in the neonatal period. Early detection prevents disability or death through timely intervention. The OPTIMAL screening window is 24–72 HOURS AFTER BIRTH (some centres recommend after the first feeding to ensure adequate protein intake, important for conditions like PKU). A small amount of blood is collected from a HEEL PRICK onto filter paper, dried, and sent to a regional newborn screening laboratory for analysis. The CONDITIONS SCREENED (as per RA 9288 and current expansion efforts) include: (1) CONGENITAL HYPOTHYROIDISM—screening with TSH and/or free T4; early treatment with levothyroxine prevents cretinism (severe intellectual disability) and growth retardation; (2) CONGENITAL ADRENAL HYPERPLASIA (CAH)—screening with 17-hydroxyprogesterone; early steroid replacement prevents virilization in females and salt-wasting in both sexes; (3) PHENYLKETONURIA (PKU)—screening with blood phenylalanine level; early detection allows implementation of a low-phenylalanine diet to prevent intellectual disability; (4) GALACTOSEMIA—screening with total galactose; early switch to lactose-free formula prevents intellectual disability, cataracts, and cirrhosis; (5) G6PD DEFICIENCY—screening with enzymatic assay; identifies males and females with deficiency so they can avoid triggers (fava beans, sulfa drugs, antimalarials, naphthalene/mothballs) that cause haemolytic crises; (6) OTHER CONDITIONS may now be screened including biotinidase deficiency, maple syrup urine disease, medium-chain acyl-CoA dehydrogenase deficiency, and others, depending on regional expansion. The screening is MANDATORY for all births at birth facilities; home births may require referral for screening. Parents receive their results (typically negative/normal results reassure families; positive/abnormal results require CONFIRMATION with a second test and referral to a specialist for diagnostic confirmation and initiation of treatment). The nurse's role includes: (1) Ensuring every newborn is screened within the optimal window; (2) Educating parents on the importance of screening and the conditions detected; (3) Coordinating follow-up if screening results are abnormal; (4) Supporting families when a condition is diagnosed. COST is typically covered by government or insurance; private screening may be available for parents desiring expanded panels.

Phenylketonuria (PKU): Inborn Error of Metabolism and Dietary Management

Importance

PKU is a CLASSIC NLE topic testing knowledge of: (1) autosomal recessive inheritance, (2) newborn screening (heel-prick >2 days post-birth, after protein feeding), (3) dietary management (low protein, no aspartame), (4) importance of early detection and treatment (prevents intellectual disability), and (5) family education (lifelong diet, monitoring, maternal risks in pregnancy). The examiner frequently presents a case of an infant with positive newborn screening or a school-age child with undiagnosed PKU (developmental delay, light skin, musty odour) and tests the nurse's recognition and intervention. The nursing diagnoses Imbalanced Nutrition (related to low-phenylalanine diet), Deficient Knowledge (family), and Risk for Delayed Development are priorities. The nurse's role in coordinating with metabolic specialists, educating families, and monitoring dietary adherence directly impacts the child's neurodevelopmental outcome.

Phenylketonuria (PKU) is an AUTOSOMAL RECESSIVE inborn error of amino acid metabolism caused by deficiency of the enzyme PHENYLALANINE HYDROXYLASE, which normally converts the amino acid PHENYLALANINE to TYROSINE. Without this enzyme, phenylalanine accumulates to toxic levels in the blood and tissues, damaging the central nervous system and causing SEVERE INTELLECTUAL DISABILITY if left untreated. The condition is detected by the NEWBORN SCREENING heel-prick test (blood phenylalanine >20 mg/dL is abnormal; normal is <2 mg/dL). Diagnosis is confirmed with a SECOND heel-prick test after 24 hours of protein feeding (PKU may not be detected if screening is done too early, before phenylalanine has accumulated—this is why the first test is ideally done AFTER the first protein-containing feeding, typically at 24–48 hours). If PKU is confirmed, treatment begins IMMEDIATELY with a LIFELONG LOW-PHENYLALANINE DIET. The management includes: (1) SPECIAL FORMULAS—for infants, a phenylalanine-free infant formula (e.g., Analog, PKU-Aglutella) is used from birth; breast feeding is NOT prohibited but requires supplementation with the special formula and monitoring of blood phenylalanine; (2) DIETARY RESTRICTIONS—high-protein foods (meat, fish, eggs, dairy, legumes, nuts) must be avoided or strictly limited; fruits, vegetables, and low-protein breads are allowed; (3) ARTIFICIAL SWEETENER RESTRICTION—ASPARTAME (found in diet sodas, sugar-free candies, some medications) is CONTRAINDICATED because aspartame is metabolized to aspartic acid and METHANOL, but crucially, some sources metabolize it to PHENYLALANINE; the child must avoid aspartame-containing products; (4) MONITORING—regular blood phenylalanine levels are checked to maintain therapeutic range (2–6 mg/dL for young children, ~2–10 mg/dL for older children and adults); levels are monitored monthly in infancy, then less frequently as the child grows; (5) MULTIDISCIPLINARY TEAM—a metabolic nutrition specialist, paediatrician, and nurse are essential to adjust the diet as the child grows, enters school (lunch management), and transitions to adolescence/adulthood. With early detection and strict dietary adherence from infancy, children with PKU develop NORMALLY and have a good prognosis. However, phenylalanine is an essential amino acid needed for growth, so the diet must be carefully balanced to provide adequate but not excess phenylalanine. Inadequate treatment (diet started late or not adhered to) results in intellectual disability, light skin and hair colour, eczema, a 'musty' or 'mousy' body odour (from phenylalanine metabolites), seizures, and behavioural problems. In TEENAGE GIRLS and WOMEN with PKU, strict dietary adherence is CRITICAL during pregnancy because maternal hyperphenylalaninaemia causes TERATOGENIC effects on the fetus (intellectual disability, congenital heart defects, microcephaly), regardless of the fetus's genotype—this is called 'maternal PKU syndrome.'

G6PD Deficiency: X-Linked Enzyme Deficiency and Avoidance of Triggers

Importance

G6PD deficiency is tested on the NLE as part of the Philippine Newborn Screening Programme and as a condition requiring meticulous family education to prevent harm. The examiner expects the nurse to: (1) recognize that G6PD is X-linked and affects primarily males, (2) identify the triggers (fava beans, sulfa drugs, antimalarials, mothballs), (3) explain why these triggers cause haemolysis (oxidative stress in RBCs without G6PD protection), (4) educate families on avoidance (ABSOLUTE prohibitions, medication screening, removal of mothballs from home), and (5) manage acute haemolytic episodes. This is a CRITICAL SAFETY teaching point, as inadvertent exposure (e.g., a child eating fava beans unaware, or being given a sulfa drug) can cause life-threatening haemolysis. The nursing diagnosis Risk for Injury (from haemolysis) and Deficient Knowledge (family) are priorities.

G6PD (GLUCOSE-6-PHOSPHATE DEHYDROGENASE) DEFICIENCY is an X-LINKED RECESSIVE enzyme deficiency affecting red blood cells. The G6PD enzyme catalyzes a reaction in the pentose phosphate pathway, which is critical for protecting RBCs from oxidative damage. Without adequate G6PD, RBCs are vulnerable to haemolysis (rupture) when exposed to OXIDATIVE STRESSORS. Affected individuals (almost exclusively males; carrier females rarely have symptoms unless severely skewed lyonization occurs) are asymptomatic at baseline but develop acute haemolytic episodes when exposed to TRIGGERS: (1) FAVA BEANS—the classic trigger; consumption causes acute haemolysis in minutes to hours, with jaundice, dark urine (from haemoglobinuria), pallor, tachycardia, and sometimes acute kidney injury; this is why G6PD deficiency is sometimes called 'Favism'; (2) CERTAIN DRUGS—sulfonamides (sulfa drugs used for UTI/infections), antimalarials (primaquine, which is used for malaria), nitrofurantoin (antibiotic), dapsone, salicylates (aspirin), acetaminophen (high doses), and others; (3) NAPHTHALENE AND MOTHBALLS—camphor, paradichlorobenzene; (4) INFECTIONS—viral or bacterial infections can trigger haemolysis; (5) SEVERE EXERTION or STRESS. Screening via the NEWBORN SCREENING PROGRAMME identifies G6PD-deficient newborns, allowing preventive education. Diagnosis is confirmed with a G6PD ENZYME ASSAY (erythrocyte G6PD activity). There is NO CURE for G6PD deficiency, but hemolysis is entirely PREVENTABLE through strict AVOIDANCE of TRIGGERS. The nurse educates families: ABSOLUTE PROHIBITIONS are fava beans, sulfa drugs, antimalarials (if the child travels to endemic areas, alternative malaria prophylaxis must be used), and naphthalene products (mothballs)—these must be removed from the home; over-the-counter medications must be carefully screened (avoid high-dose aspirin, NSAIDs if possible); parents should inform all healthcare providers (schools, camps, daycare) of the deficiency and provide a list of prohibited drugs. During an acute haemolytic episode, management is supportive: rest, hydration, and monitoring; severe cases may require transfusion. With prevention, G6PD deficiency does NOT affect lifespan or quality of life.

Important points

Acute Lymphoblastic Leukemia (ALL) is the MOST COMMON CHILDHOOD CANCER with peak incidence 2–5 years; uncontrolled blast proliferation causes PANCYTOPENIA (anemia + neutropenia + thrombocytopenia), and INFECTION is the LEADING CAUSE OF DEATH.
FEVER in a neutropenic child (WBC <500/µL) is treated as a medical EMERGENCY—fever is often the ONLY sign of infection because the child lacks immune cells to mount a response; DO NOT delay antibiotics waiting for culture results.
NEUTROPENIC PRECAUTIONS are absolute: NO fresh flowers/plants (bacterial/fungal spores), NO raw/uncooked foods (bacteria), NO crowds/sick visitors, NO rectal temperatures/suppositories/IM injections (breach mucosal barrier), monitor temperature Q4H, LIVE VACCINES CONTRAINDICATED during chemotherapy.
BLEEDING PRECAUTIONS in thrombocytopenia: soft toothbrush, AVOID ASPIRIN/NSAIDs (inhibit platelet function—major safety point), no contact sports, no IM injections, gentle pressure to bleeding sites, platelet transfusion if <10,000–20,000/µL or symptomatic.
Chemotherapy side effects require PROACTIVE management: give antiemetics BEFORE chemo, manage mucositis with saline rinses and soft foods (NO alcohol-based mouthwash), reassure on alopecia regrowth, manage vincristine-induced constipation and neuropathy, monitor nutritional intake.
HEMOPHILIA is X-LINKED RECESSIVE: Hemophilia A (Factor VIII, 80% of cases) affects males; carrier females have 50% risk of affected sons and 50% carrier daughters. Inheritance: affected male → 100% carrier daughters, all unaffected sons.
HEMARTHROSIS (bleeding into joints) is the hallmark of hemophilia; management is RICE (Rest, Ice, Compression, Elevation) PLUS factor replacement as soon as possible (within 1–2 hours) to prevent irreversible joint damage.
SICKLE CELL DISEASE is AUTOSOMAL RECESSIVE (HbS); TRIGGERS of vaso-occlusive crisis are HYPOXIA, DEHYDRATION, COLD, INFECTION, ACIDOSIS—remember to NEVER apply cold (cold PROMOTES sickling).
PRIORITY management of sickle cell vaso-occlusive crisis is HHOP: Hydration (IV fluids), Heat (warmth—NEVER cold), Oxygen (if SpO2 low), Pain control (opioids for severe pain); HYDROXYUREA reduces crisis frequency by raising fetal hemoglobin.
THALASSEMIA MAJOR requires regular transfusions, leading to IRON OVERLOAD over 5–10 years; iron damages the heart (cardiomyopathy), liver (cirrhosis), pancreas (diabetes), and pituitary (hypogonadism); IRON OVERLOAD IS NOW THE LEADING CAUSE OF DEATH in thalassemia major.
CHELATION THERAPY for iron overload: DEFEROXAMINE (parenteral, nightly subcutaneous/IV infusion) or DEFERASIROX (oral, convenient); chelation MUST be given REGULARLY to PREVENT overload, not to reverse it after organ damage.
IRON-DEFICIENCY ANEMIA is the MOST COMMON NUTRITIONAL ANEMIA in children, peaking in infants (cow's milk before 12 months) and adolescents; give ferrous sulfate 3–6 mg/kg/day elemental iron BETWEEN MEALS, WITH vitamin C (orange juice) for absorption, NEVER with milk.
IRON ADMINISTRATION SAFETY: use STRAW to prevent TOOTH STAINING; DARK/TARRY-BLACK STOOLS are NORMAL (reassure families); ACCIDENTAL IRON POISONING IS A LEADING CAUSE OF POISONING DEATH IN YOUNG CHILDREN—KEEP IRON LOCKED AWAY.
If iron poisoning is suspected: measure serum iron at 4–6 hours, give DEFEROXAMINE as specific antidote, monitor for phases (GI irritation → honeymoon period → cardiovascular collapse), URGENT transport to hospital required.
IMMUNE THROMBOCYTOPENIC PURPURA (ITP) presents with ISOLATED THROMBOCYTOPENIA (low platelets only, normal WBC/Hb); child LOOKS WELL (unlike leukemia); often follows viral illness; often self-limiting but requires bleeding precautions.
DOWN SYNDROME (Trisomy 21) is the MOST COMMON CHROMOSOMAL DISORDER; classic features: HYPOTONIA, upward-slanting eyes with epicanthal folds, PROTRUDING TONGUE (small oral cavity), SINGLE PALMAR CREASE, wide toe gap; ADVANCED MATERNAL AGE increases risk exponentially.
DOWN SYNDROME SCREENING priorities: CONGENITAL HEART DEFECTS (AV canal defects ~40–50%)—early echo required; DUODENAL ATRESIA—'double-bubble' on X-ray, urgent surgery; hypothyroidism screening; HEARING AND VISION screening; ATLANTOAXIAL INSTABILITY—caution with neck flexion.
DOWN SYNDROME FEEDING: hypotonia and small oral cavity make feeding difficult; support head/neck, feed SLOWLY, use INFANT-PACED feeding, position upright post-feed to prevent aspiration, monitor on Down-syndrome-specific growth charts.
INHERITANCE PATTERNS: (1) Autosomal recessive (25% affected if both parents carriers): sickle cell, thalassemia, PKU, cystic fibrosis; (2) X-linked recessive (50% affected sons, 50% carrier daughters if mother is carrier): hemophilia, G6PD deficiency; (3) Chromosomal (trisomy from nondisjunction, recurrence risk ~1% baseline + maternal age risk): Down syndrome.
PHILIPPINE NEWBORN SCREENING (RA 9288) screens all newborns 24–72 hours post-birth (ideally AFTER FIRST FEEDING for PKU detection): congenital hypothyroidism, CAH, PKU, galactosemia, G6PD deficiency; EARLY DETECTION PREVENTS DISABILITY/DEATH.
PHENYLKETONURIA (PKU) is autosomal recessive; PHENYLALANINE HYDROXYLASE deficiency → phenylalanine accumulates → intellectual disability if untreated; detected by newborn screening (heel-prick); treatment: LIFELONG LOW-PHENYLALANINE DIET, AVOID ASPARTAME (metabolized to phenylalanine), special formulas, regular blood phenylalanine monitoring.
G6PD DEFICIENCY is X-LINKED RECESSIVE; triggers HEMOLYSIS: FAVA BEANS (classic), SULFA DRUGS, ANTIMALARIALS, NAPHTHALENE/MOTHBALLS, INFECTIONS, SEVERE EXERTION; PREVENTION: ABSOLUTE AVOIDANCE of triggers, list of prohibited drugs for all providers, removal of mothballs from home.
FAMILY EDUCATION is central to all paediatric hematologic/oncologic/genetic disorders; use non-directive genetic counselling (explain risks without judgment); provide written materials; connect families with support groups; emphasize strengths and potential of the child; celebrate developmental progress.
USE MASLOW'S HIERARCHY to prioritize nursing diagnoses: in neutropenic leukemia, SAFETY (infection prevention) and PHYSIOLOGICAL (infection, bleeding) supersede all; in chronic conditions (thalassemia, Down syndrome), growth/development and belonging/support are progressively important as acute crises are managed.

Chapter objectives

Explain the pathophysiology and clinical manifestations of acute lymphoblastic leukemia (ALL) and other paediatric malignancies
Apply neutropenic and bleeding precautions in the care of the child on chemotherapy, prioritizing infection prevention as the leading cause of death
Describe X-linked recessive inheritance patterns (hemophilia) and autosomal recessive inheritance (sickle cell disease, thalassemia) to guide family counselling and risk assessment
Manage acute vaso-occlusive (painful) crisis in sickle cell disease using evidence-based interventions (HHOP: Hydration, Heat, Oxygen, Pain control)
Implement iron supplementation safely in iron-deficiency anemia, including prevention of accidental iron poisoning in young children
Recognize the clinical features of Down syndrome (Trisomy 21) and screen for associated congenital anomalies (heart defects, duodenal atresia) using evidence-based assessment
Apply knowledge of the Philippine Newborn Screening Programme to identify conditions like PKU and G6PD deficiency and implement appropriate dietary/preventive measures
Provide family-centered education on medication administration, dietary management, and lifestyle modifications to support adherence and prevent complications

Concept relationships

Concept

ALL Pancytopenia

Related concept

Neutropenic Precautions

Relationship

Pancytopenia (particularly neutropenia <500/µL) necessitates neutropenic precautions because the child cannot mount an immune response to infection; these precautions (no raw foods, no fresh flowers, no invasive procedures, fever = emergency) are DIRECT CONSEQUENCES of the underlying pathophysiology. The relationship is causal: deficiency → risk → intervention.

Concept

Hemophilia Inheritance (X-Linked Recessive)

Related concept

Hemarthrosis Management

Relationship

Understanding X-linked inheritance guides FAMILY identification and counselling; separately, the high prevalence of hemarthrosis in hemophilia (due to repeated bleeding into joints) drives the RICE intervention and early factor replacement. Both concepts address different clinical questions: genetics (who is at risk?) and acute management (how do we treat a bleed?).

Concept

Sickle Cell HbS Polymerization

Related concept

HHOP Crisis Management

Relationship

HbS polymerizes under stress (hypoxia, dehydration, cold, infection), causing vaso-occlusion; HHOP directly REVERSES each trigger: Hydration corrects dehydration, Heat promotes vasodilation (opposite of cold-induced vasoconstriction), Oxygen reduces hypoxia (reduces HbS polymerization tendency), Pain control allows rest and healing. The management is directly targeted at the pathophysiology.

Concept

Thalassemia Major Chronic Transfusion Dependence

Related concept

Iron Overload and Chelation Therapy

Relationship

Transfusions are NECESSARY to treat anaemia but CAUSE iron overload as a consequence (no physiological iron excretion). Iron overload causes multi-organ damage (cardiomyopathy, cirrhosis, diabetes); chelation is a PREVENTIVE measure required to live safely with chronic transfusions. This is a risk-benefit relationship: transfusions save life but require lifelong chelation to prevent complications.

Concept

Iron-Deficiency Anaemia

Related concept

Iron Supplementation Safety and Toxicity

Relationship

Iron supplementation TREATS the anaemia but carries significant toxicity risk if overdosed (accidental poisoning in young children is a leading cause of death); the nurse must balance EFFICACY (give adequate iron to correct anaemia) with SAFETY (keep iron locked away, prevent accidental ingestion, educate families). This is a core nursing tension: providing necessary therapy while preventing harm.

Concept

Down Syndrome Hypotonia and Small Oral Cavity

Related concept

Feeding Challenges and Nutritional Support

Relationship

The characteristic PHYSICAL FEATURES of Down syndrome (hypotonia, protruding tongue, small oral cavity) DIRECTLY CAUSE feeding difficulties (poor suck, weak swallow, aspiration risk); nursing interventions (head/neck support, slow feeding, upright positioning) DIRECTLY ADDRESS these anatomical/physiological deficits. The relationship is anatomically causal.

Concept

Down Syndrome Associated Congenital Anomalies

Related concept

Early Screening and Prevention of Complications

Relationship

Down syndrome carries VERY HIGH risk of specific anomalies (AV canal defects, duodenal atresia, hypothyroidism, hearing loss); EARLY SCREENING (echo, abdominal X-ray, TSH, audiometry) DETECTS these before complications (heart failure, bilious vomiting, developmental delay) occur; early intervention (surgery, hormone replacement, hearing aids) PREVENTS disability. The relationship is preventive: screening → early detection → early intervention → prevention of morbidity/mortality.

Concept

Autosomal Recessive Inheritance (Sickle Cell, Thalassemia, PKU)

Related concept

Family Counselling and Recurrence Risk

Relationship

Understanding autosomal recessive inheritance (25% affected if both parents carriers, 50% carriers, 25% unaffected) allows the nurse to: identify SIBLING RISK (siblings of affected child have 25% chance of being affected if both parents are carriers), counsel on FUTURE PREGNANCY RISK (25% if both parents carriers; less if only one parent known carrier), and refer for GENETIC TESTING of siblings. The relationship enables PROACTIVE family health management.

Concept

G6PD Deficiency X-Linked Inheritance

Related concept

Trigger Avoidance and Prevention of Hemolysis

Relationship

G6PD deficiency (X-linked, affects males) causes NO symptoms at baseline but haemolysis occurs with oxidative triggers (fava beans, sulfa drugs, etc.); prevention is entirely through trigger AVOIDANCE. The inheritance pattern explains WHY males are affected (single X allele), and the pathophysiology explains HOW triggers cause haemolysis; together, they guide education (male-specific risk, absolute trigger avoidance). The relationship is informative and educational.

Concept

Philippine Newborn Screening Programme (RA 9288)

Related concept

Early Detection of PKU and G6PD Deficiency

Relationship

The newborn screening programme DETECTS PKU and G6PD deficiency in the asymptomatic neonatal period (before symptoms develop); this allows IMMEDIATE intervention (low-phenylalanine diet for PKU, trigger avoidance for G6PD) that PREVENTS lifelong disability or recurrent life-threatening haemolysis. The relationship demonstrates how PUBLIC HEALTH SCREENING enables PRIMARY/SECONDARY prevention and aligns with RA 9173 health promotion mandates.

Practical applications

Disorder

Acute Lymphoblastic Leukemia (ALL) - Neutropenic Child

NLE connection

This is a classic HIGH-FREQUENCY NLE scenario testing recognition of fever in neutropenia as a medical emergency, implementation of neutropenic precautions, and family education. The examiner expects the nurse to prioritize infection prevention using Maslow's hierarchy (physiological safety/infection risk is the top priority, superseding the child's psychosocial need for visitors).

Clinical scenario

A 4-year-old boy is admitted for induction chemotherapy for ALL. Neutrophil count drops to 200/µL (severe neutropenia). The child develops a fever of 38.8°C. The parent asks if the child can have visitors today.

Nursing intervention

IMMEDIATELY notify the physician—fever in neutropenia is SEPSIS until proven otherwise. STAT blood cultures, begin broad-spectrum antibiotics within 1 hour (do NOT wait for results). Implement/reinforce neutropenic precautions: Private room, NO visitors with illness, NO fresh flowers/plants, NO raw foods, monitor temperature Q4H, NO rectal temps/suppositories/IM injections. Educate the parent that visitors are restricted during this critical period but can return once neutrophil count recovers >1000/µL. Explain that fever is the ONLY sign of life-threatening infection in neutropenia and requires emergency treatment. Provide emotional support; isolation can feel scary for the child and family.

Disorder

Hemophilia A - Acute Hemarthrosis

NLE connection

This tests the nurse's ability to recognize acute hemarthrosis, initiate RICE and factor replacement, and counsel families on the CRITICAL importance of early treatment. Time is brain—or in this case, time is joint. The examiner expects the nurse to know that delayed treatment causes irreversible joint damage (arthropathy), whereas early treatment (within 1–2 hours) allows resolution without long-term damage.

Clinical scenario

An 8-year-old boy with Hemophilia A has sudden onset of severe right knee pain, swelling, and warmth after a minor fall at school. His parent brings him to the ER. The parent asks if the child can go home after pain relief.

Nursing intervention

This is an ACUTE HEMARTHROSIS—a medical emergency requiring IMMEDIATE factor replacement AND RICE. (1) Assess pain severity and give strong analgesia (opioids if severe). (2) Arrange STAT Factor VIII concentrate infusion (dose determined by baseline factor level and target level; typically aiming for 80–100% factor activity). (3) Apply RICE: REST (immobilize knee in elevated position on pillows), ICE (cold packs 15–20 minutes), COMPRESSION (gentle wrap with ace bandage), ELEVATION (leg on pillows). (4) Plan for PHYSICAL THERAPY post-bleed to restore knee range of motion and prevent stiffness. (5) Educate on the critical importance of EARLY treatment—the child should have been brought to hospital IMMEDIATELY when pain started, not several hours later. Late treatment risks permanent joint damage. (6) Reinforce home safety (padding, helmets, avoiding contact sports), the importance of wearing medical-alert ID, and when to use factor at home (keep supplies readily available for rapid self-infusion/infusion by caregiver). The child CANNOT go home without factor treatment and observation.

Disorder

Sickle Cell Disease - Vaso-Occlusive Crisis

NLE connection

This tests the nurse's ability to recognize precipitating factors of vaso-occlusive crisis (hypoxia, dehydration, infection), implement HHOP, and provide anticipatory guidance (avoid high altitude, cold, dehydration). A CRITICAL safety point: NEVER apply cold (many families mistakenly use ice thinking it will help pain; the nurse must clarify that cold CAUSES sickling). The examiner expects clear distinction of Maslow priorities: pain management and infection control (physiological needs) are addressed before counselling on long-term prevention.

Clinical scenario

A 6-year-old girl with sickle cell disease (HbSS) presents to the ER with severe abdominal and leg pain, fever (38.9°C), and clear evidence of dehydration (dry mucous membranes, poor skin turgor). The child is also on a home visit to a high-altitude ski resort. The parent asks if the child should stay in the mountains for the planned week-long visit.

Nursing intervention

This child is in ACUTE VASO-OCCLUSIVE CRISIS TRIGGERED BY HYPOXIA (high altitude causes decreased pO2, promoting HbS polymerization and sickling), DEHYDRATION, and possibly INFECTION (fever). IMMEDIATE management: (1) HHOP protocol: (a) Hydration—START IV normal saline (generous hydration corrects dehydration, improves blood viscosity, reduces sickling); ensure urine output 1–1.5 mL/kg/hr; (b) Heat—apply warm blankets/heating pad to painful areas (promote vasodilation, reduce ischaemia); NEVER apply cold (CRITICAL safety point: cold PROMOTES sickling); (c) Oxygen—supplemental oxygen if SpO2 <95%; (d) Pain control—strong opioid analgesia (morphine or hydromorphone, not NSAIDs); give regularly, not PRN only, during crisis; assess pain q15min and titrate. (2) Investigate fever—blood cultures, urinalysis, chest X-ray if respiratory symptoms; start antibiotics if infection suspected (infections trigger crises and increase mortality). (3) Education: The child CANNOT stay at high altitude—the planned week-long ski visit must be CANCELLED. Hypoxia is a major crisis trigger; high altitude increases sickling risk. Advise the family to return to lower altitude and manage crisis in hospital as needed. Reinforce prevention: avoid high altitude, strenuous exertion (even vigorous sports can cause hypoxia-induced sickling), dehydration (keep well-hydrated, especially in hot weather), and cold exposure (never expose to cold; use warming layers in winter). Emphasize that hydroxyurea can reduce crisis frequency and should be taken regularly.

Disorder

Thalassemia Major - Chronic Transfusion Dependence and Iron Overload Prevention

NLE connection

This tests the nurse's ability to explain PREVENTION vs. TREATMENT (chelation prevents iron overload; it cannot reverse damage already done), emphasize the LONG-TERM CONSEQUENCES of non-adherence (cardiomyopathy, cirrhosis), and motivate families to continue therapy despite burden. The examiner often presents a non-adherent family scenario and expects the nurse to balance empathy (acknowledge the burden) with clarity (explain the life-and-death stakes). This is a core chronic disease management competency.

Clinical scenario

A 10-year-old boy with thalassemia major receives regular transfusions (monthly protocol to keep Hb ~9–10 g/dL) to manage his severe anaemia. His last ferritin level was 2500 ng/mL (elevated). His parents ask why he needs to take deferoxamine nightly—they think it's another drug burden and wish to stop it since 'he feels fine.'

Nursing intervention

This is a CRITICAL TEACHING MOMENT. Explain the mechanism of iron overload and why chelation is ESSENTIAL: (1) Pathophysiology: Each unit of transfused blood contains ~250 mg iron; the body has NO mechanism to excrete excess iron. Over 5–10 years of transfusions, iron accumulates to toxic levels (>5–10 g total body iron). (2) Complications: Iron deposits in the HEART (causing cardiomyopathy, arrhythmias, heart failure), LIVER (cirrhosis, liver failure), PANCREAS (diabetes), PITUITARY (hypogonadism, short stature, delayed puberty), THYROID (hypothyroidism), and JOINTS (arthralgia). Iron overload is NOW THE LEADING CAUSE OF DEATH in thalassemia major. (3) Prevention: Chelation PREVENTS these complications by binding and excreting iron; it is NOT a treatment for iron damage that has already occurred—prevention is FAR MORE effective than reversal. (4) Medication: DEFEROXAMINE (nightly subcutaneous infusion) or DEFERASIROX (oral, once daily) must be given REGULARLY, not just when ferritin rises. The child 'feels fine' NOW because iron damage is asymptomatic in early stages; by the time symptoms appear (palpitations, joint pain, abdominal pain), organ damage is already advanced and often irreversible. (5) Monitoring: Regular serum ferritin, liver MRI and cardiac MRI (quantify iron in organs), echocardiography (assess cardiac function), and endocrine screening (HbA1c, thyroid, gonadal hormones) track iron burden and organ function. Emphasize: if he stops chelation, his ferritin will rise, iron will accumulate, and within years he will develop cardiomyopathy or cirrhosis. The nightly therapy NOW prevents lifelong disability and death. Encourage: involve the child in self-administration (age-appropriate infusion pump training) to promote adherence and independence. Connect family with support groups for long-term disease management.

Disorder

Iron-Deficiency Anaemia in Toddler - Safe Supplementation

NLE connection

This is a VERY HIGH-FREQUENCY NLE scenario testing: (1) correct iron dose calculation, (2) administration techniques (use dropper, direct to back of mouth to prevent staining, give with vitamin C, NEVER with milk), (3) expected side effects (dark stools, constipation) and how to address them, (4) SAFETY (lock iron away—poisoning prevention), and (5) when to continue supplementation (3–6 months after Hb normalizes). The examiner often presents a parent question like the one above ('Should I give with milk?') and expects the nurse to immediately correct this misconception and explain the rationale. Family education quality and safety awareness are heavily weighted on the NLE.

Clinical scenario

A 18-month-old boy is diagnosed with iron-deficiency anaemia (Hb 7.5 g/dL) from early introduction of whole cow's milk. The paediatrician prescribes ferrous sulfate 150 mg (containing 30 mg elemental iron) twice daily. The parent is confused about administration and asks, 'Should I give it with milk to help with absorption? Can I add it to his milk bottle?'

Nursing intervention

CRITICAL EDUCATION on iron administration: (1) DOSE: The prescribed dose is 30 mg elemental iron twice daily = 60 mg/day total; for this 18-month-old (~11 kg), the dose is approximately 5.5 mg/kg/day, which is APPROPRIATE (target 3–6 mg/kg/day). (2) TIMING: Give on an EMPTY STOMACH (between meals, not with food) for MAXIMUM ABSORPTION. DO NOT GIVE WITH MILK—milk contains calcium and phosphate that INHIBIT iron absorption by forming complexes. If GI upset occurs (nausea, cramping), may give with a small snack (fruit, bread) but AVOID dairy. (3) ENHANCE ABSORPTION: Give WITH VITAMIN C (ascorbic acid)—offer a small glass of orange juice immediately before or with the iron dose; Vitamin C increases iron absorption by 3–4 fold. This is a HIGH-YIELD teaching point. (4) ADMINISTRATION TECHNIQUE: Use a DROPPER or ORAL SYRINGE to measure the liquid accurately. Direct the liquid to the BACK of the mouth (avoid teeth) to prevent TOOTH STAINING—liquid iron stains teeth BROWN/BLACK and is cosmetically unacceptable; the parent should brush the child's teeth immediately after administration. (5) EXPECTED EFFECTS: The child's stools will turn DARK/TARRY-BLACK (melena-like appearance) from unabsorbed iron—this is NORMAL and reassure the parent to prevent unnecessary alarm. Expect mild GI side effects (nausea, cramping, constipation). (6) CONSTIPATION MANAGEMENT: Proactively manage constipation with stool softeners (docusate), adequate fluids, and fibre-rich foods. Constipation is very common and reduces adherence if not addressed. (7) RESPONSE TIMELINE: Reticulocyte count rises in 3–5 days; haemoglobin rises ~1 g/dL every 2–3 weeks with good adherence. The child will feel more energetic within 1–2 weeks (less fatigue, improved appetite and mood), which provides positive reinforcement. Continue iron supplementation for 3–6 months after haemoglobin normalizes to replete body iron stores. (8) SAFETY—CRITICAL: KEEP ALL IRON BOTTLES LOCKED AWAY in a secure cabinet with childproof lock or out of reach. ACCIDENTAL IRON POISONING IS A LEADING CAUSE OF POISONING DEATH IN YOUNG CHILDREN. Even a small number (3–10 tablets of adult iron supplements) can be FATAL to a toddler. The parent should never leave an iron bottle unattended on a table or counter. (9) PREVENTION FOR THE FUTURE: Once anaemia resolves, introduce iron-rich foods (fortified cereals, meat, legumes) and DELAY whole cow's milk until after 12 months; when introduced, limit to ~16–24 oz/day (so it doesn't displace iron-rich complementary foods). Breastfeeding or iron-fortified formula (not whole cow's milk) is ideal for first 12 months.

Disorder

Down Syndrome - Newborn Recognition and Family Counselling

NLE connection

This is a COMPREHENSIVE NLE scenario testing: (1) recognition of Down syndrome physical features (hypotonia, facial features, palmar crease, toe gap), (2) knowledge of associated anomalies (heart defects, duodenal atresia, hypothyroidism, hearing/vision problems, leukemia risk), (3) screening timeline and tests (echo, abdominal imaging, TSH, audiometry), (4) family-centered counselling (non-directive, strength-based, emotional support), (5) understanding of prognosis (modern improved life expectancy and variable disability outcomes), and (6) referral and resource navigation. The examiner expects the nurse to demonstrate COMPASSION, ACCURATE INFORMATION, and STRENGTH-BASED language (not doom-and-gloom predictions). This is a test of nursing presence, emotional intelligence, and advocacy for the family.

Clinical scenario

A newborn is delivered with visible features suspicious for Down syndrome: hypotonia, upward-slanting eyes with epicanthal folds, a protruding tongue, a single transverse palmar crease, and a wide gap between the first and second toes. The paediatrician is initiating diagnostic workup (karyotype/FISH), and the parents are shocked and asking many questions. The father asks, 'Did we do something wrong during pregnancy? Will he be severely disabled? What's his life expectancy?'

Nursing intervention

This is a CRITICAL MOMENT for compassionate, family-centered nursing. The nurse's responses directly impact the family's acceptance, bonding, and engagement with early intervention. (1) INITIAL REASSURANCE: Explain that Down syndrome is a CHROMOSOMAL condition (extra copy of chromosome 21), NOT caused by anything the parents did during pregnancy or before conception—it is a RANDOM event during cell division that occurs regardless of maternal age, nutrition, stress, or prenatal care (though older maternal age increases risk). NO parents 'caused' Down syndrome. (2) RECOGNIZE STRENGTHS: Reframe from 'What's wrong?' to 'Let me tell you about your child.' Emphasize that the child has Down syndrome; he is not 'a Down syndrome.' Highlight that many children with Down syndrome attend mainstream schools, develop social skills, live semi-independently, and bring joy and unique perspectives to their families. (3) ADDRESS SPECIFIC FEATURES: Explain the characteristic physical features (hypotonia, facial features, palmar crease, toe gap) and that these are COMPATIBLE WITH LIFE and do not cause suffering. The child will need support with motor development and learning, but with early intervention, many children make significant progress. (4) ASSOCIATED CONDITIONS SCREENING (answer to 'disability' concerns): Explain that while Down syndrome itself does not cause a shortened life, ASSOCIATED CONGENITAL ANOMALIES must be screened and managed. CRITICAL SCREENS: (a) ECHOCARDIOGRAPHY (cardiac echo) within the first week—to detect heart defects (40–50% have AV canal defects or other lesions); early detection allows surgical repair if needed, preventing heart failure and failure to thrive. (b) ABDOMINAL ULTRASOUND or follow newborn signs closely for DUODENAL ATRESIA (presents with bilious vomiting within hours of birth, 'double-bubble' on X-ray, requires urgent surgery). (c) TSH AND FREE T4 screening—for congenital hypothyroidism; if present, levothyroxine replacement prevents intellectual disability and growth retardation. (d) AUDIOMETRY AND VISION SCREENING—conductive hearing loss and vision problems are common; early correction with hearing aids, glasses, or other interventions prevents developmental delay and improves quality of life. (e) PERIODIC CBC—increased leukemia risk; early detection improves prognosis. (5) PROGNOSIS: With modern healthcare and early intervention, LIFE EXPECTANCY IS NOW >50 YEARS (compared to <10 years 50 years ago). The child will likely have intellectual disability (IQ varies widely, often 30–70 with support), but many children develop language, social skills, and varying degrees of independence. Children with Down syndrome often have warm, loving personalities and form meaningful relationships. Avoid absolute predictions of disability; development is variable. (6) EARLY INTERVENTION: Emphasize that the child is ELIGIBLE for early intervention services (physical therapy, occupational therapy, speech-language pathology, developmental specialists) starting immediately—these services SIGNIFICANTLY improve motor and developmental outcomes. Early stimulation and therapy in the first 3 years have the MOST IMPACT. (7) FEEDING AND DEVELOPMENT: The child will have feeding challenges (hypotonia, small oral cavity, protruding tongue) initially, but with gentle feeding support and speech therapy, most children develop adequate feeding. Developmental milestones will be delayed (may sit ~9–12 months, walk ~18–36 months) but are achievable with support. (8) GENETIC COUNSELLING: Offer referral to a genetic counselor to discuss: (a) Whether karyotype shows regular Trisomy 21 (nondisjunction, RECURRENCE RISK ~1% baseline plus maternal age-related risk for future pregnancies) or a Translocation (if one parent is a balanced carrier, recurrence risk is much higher ~10–15%; if both parents have normal karyotypes, recurrence risk is still ~1%). (b) Implications for family planning and future pregnancies. (9) RESOURCES AND SUPPORT: Provide written materials in the parents' preferred language; connect with Down Syndrome Association/support groups; arrange follow-up appointments for all screening tests; encourage the parents to express their emotions (grief, fear, guilt are normal) and provide contact information for counseling if needed. Emphasize that BONDING and NORMAL PARENTING (including discipline, play, expectations for age-appropriate behavior) are healthy and important. (10) NEXT STEPS: Schedule cardiac echo within one week, thyroid and hearing screening before discharge, and arrangement for early intervention services. Provide a clear discharge summary with appointments and contacts.

Disorder

G6PD Deficiency - Prevention Education and Medication Review

NLE connection

This is a COMPLEX, HIGH-YIELD NLE scenario testing: (1) knowledge of G6PD X-linked inheritance and carrier status in heterozygous females, (2) recognition of MULTIPLE triggers simultaneously (medications, mothballs, fava beans, infections) and the ability to prioritize urgent education, (3) medication safety (identifying sulfa drugs and other triggers, advocating for safe alternatives), (4) signs of haemolysis and when to seek emergency care, (5) family education on absolute trigger avoidance, and (6) communication skills (balancing urgency of safety teaching with empathy and reassurance). The scenario tests whether the nurse can manage a real-world situation where the family did NOT seek medical advice before giving medication and has been casually exposed to mothballs and fava beans—the nurse must educate without blame, clarify misunderstandings (the mother's own childhood experience with fava beans), and mobilize the family to prevent catastrophe. This is a test of clinical judgment, safety advocacy, and family-centered education.

Clinical scenario

A 5-year-old boy with G6PD deficiency (detected on newborn screening, X-linked, hemizygous) is seen in the paediatric clinic. His mother mentions he has a persistent cough and fever for 3 days, and she took him to a local pharmacy, which gave him 'antibiotic tablets.' She did not check the medication name. She also mentions the family frequently purchases clothes from markets where they store naphthalene mothballs, and her mother (the paternal grandmother) has been saving fava beans for the family's upcoming feast. The mother asks, 'Is it really dangerous for my son? I had some fava beans as a child and never got sick.'

Nursing intervention

This scenario has MULTIPLE CRITICAL SAFETY ISSUES. The nurse must provide urgent, clear education on G6PD triggers and prevention: (1) IMMEDIATE: (a) Identify the antibiotic given by the pharmacy—if it was a SULFONAMIDE (sulfa drug, commonly used for UTIs in some countries), STOP immediately—sulfa drugs trigger ACUTE HEMOLYSIS in G6PD-deficient children and can be life-threatening. Ask the mother to bring the medication bottle to the clinic immediately for review. If it WAS a sulfa drug, the child should be monitored closely for signs of haemolysis (jaundice, dark urine, pallor, tachycardia). If haemolysis occurs, the child may need urgent transfusion. (b) Advise: For future infections, the child should see a physician (not just a pharmacy) who knows about the G6PD deficiency and can prescribe safe antibiotics (paracetamol for fever—avoid high-dose aspirin/NSAIDs). (2) MOTHBALLS—CRITICAL: Naphthalene and paradichlorobenzene in mothballs are OXIDATIVE TRIGGERS and can cause haemolysis. INSTRUCTIONS: (a) REMOVE ALL MOTHBALLS from the home immediately—this includes stored clothes in closets and family possessions in storage. (b) Air out all clothes that were exposed to mothballs before wearing them. (c) NEVER use mothballs in the future—suggest alternative storage (sealed containers, cedar chips if acceptable, or dry storage without mothballs). (d) If the child has been exposed to mothballs, monitor closely for signs of haemolysis (see below). (3) FAVA BEANS—CRITICAL: Fava beans are THE CLASSIC TRIGGER of G6PD haemolysis (hence the name 'Favism'). The mother's statement, 'I had some as a child and never got sick,' is explained by: (a) She may be a CARRIER (heterozygous female, X^G X^g), and if lyonization happened to favour the normal X, she may have had few or no affected cells and did not sicken (carrier females have variable expression). (b) Or her family's G6PD variant is a 'non-severe' type that doesn't cause symptoms with modest fava bean intake. (c) Her SON, however, is HEMIZYGOUS (X^g Y, only one X chromosome) and has ALL cells deficient in G6PD—his risk is much higher. INSTRUCTIONS: (a) ABSOLUTELY PROHIBIT fava beans and any dishes containing fava beans from the child's diet. Explain that even small amounts (a handful of beans) can trigger life-threatening haemolysis. (b) Advise that if an upcoming family feast includes fava beans, the child must NOT attend or must eat only safe foods brought from home. (c) Educate the extended family (paternal grandmother, parents) on the severity of the risk; the grandmother must NOT give the child fava beans 'as a treat.' (4) SIGNS OF HAEMOLYSIS to watch for: Acute haemolytic episodes present with JAUNDICE (yellowing of skin/sclera), DARK URINE (cola or tea-coloured from haemoglobinuria), PALLOR, FATIGUE, TACHYCARDIA, and ABDOMINAL PAIN. If these occur, URGENT hospital care is needed for blood transfusion and supportive care. (5) SAFE MEDICATION LIST: Provide or arrange a detailed list of PROHIBITED drugs (sulfonamides, antimalarials like primaquine, nitrofurantoin, dapsone, high-dose aspirin, some others) and SAFE alternatives (paracetamol, penicillins, cephalosporins for antibiotics; specific alternatives for other drug categories). This list should be given to the child's school, daycare, and all healthcare providers. Advise the mother to keep a written list in the child's bag and inform any new provider immediately. (6) INFECTION MANAGEMENT: Viral infections can ALSO trigger haemolysis in G6PD. For fever/infection, advise: (a) Seek medical care (not just pharmacy) so the provider knows about G6PD and can select safe medications. (b) Use paracetamol for fever (not aspirin/NSAIDs—these can precipitate haemolysis). (c) Allow rest and hydration; most viral infections resolve without specific treatment. (d) Monitor for signs of haemolysis and seek emergency care if they occur. (7) GENETIC COUNSELLING FOR FAMILY: Explain that G6PD is X-LINKED RECESSIVE: The boy inherited the deficiency from his MOTHER (who is a CARRIER, X^G X^g, and is heterozygous but usually asymptomatic). The SISTERS (if any) have a 50% chance of being carriers (X^G X^g) or unaffected (X^G X^G). BROTHERS would be either affected (X^g Y) or unaffected (X^G Y), each 50%. The FATHER is presumably unaffected (X^G Y) unless he also has G6PD (another maternal male relative may have it). Future siblings have the same risks as this child depending on the father's status. If family planning includes more children, genetic counselling and possibly prenatal testing can be discussed. (8) REASSURANCE WITH REALITY: Explain that WITH PREVENTION (avoiding triggers), the child can live a COMPLETELY NORMAL, UNRESTRICTED LIFE. He can play sports, go to school, eat normal foods (except fava beans and trigger foods)—his life is not defined by G6PD. The key is AWARENESS and PREVENTION of triggers, not isolation or activity restriction. (9) FOLLOW-UP: Schedule follow-up appointments; provide written materials; connect with G6PD support organizations if available. Emphasize that the mother should ALWAYS inform healthcare providers and schools of the deficiency before medications are given or if illness occurs.

Disorder

PKU - Newborn Screening and Dietary Management

NLE connection

This tests the nurse's ability to: (1) explain PKU inheritance (autosomal recessive) and pathophysiology (phenylalanine accumulation → intellectual disability), (2) emphasize the CRITICAL IMPORTANCE of EARLY DETECTION and IMMEDIATE DIETARY MANAGEMENT (if started before 2 weeks of age, prognosis is excellent), (3) provide comprehensive dietary education (high-phenylalanine foods to avoid, allowed foods, ABSOLUTE aspartame prohibition), (4) understand the LIFELONG NATURE of the diet and risks of discontinuation, (5) recognize the special risks for females (maternal PKU syndrome during pregnancy), and (6) provide compassionate family education that balances the seriousness of PKU with optimism about normal development with treatment. This is a cornerstone topic for newborn screening and demonstrates the nurse's role in preventing intellectual disability through early detection and dietary management.

Clinical scenario

A 3-day-old newborn's routine heel-prick newborn screening (done at 48 hours post-birth) returns with ELEVATED blood phenylalanine (8 mg/dL; normal <2 mg/dL). A second confirmatory heel-prick is sent immediately. The parents are notified and are anxious. The mother asks, 'What does this mean? Will my baby be mentally disabled? Can he ever eat normal food?'

Nursing intervention

This is a CRITICAL EARLY INTERVENTION moment. Timely, accurate nursing education prevents intellectual disability and supports family adherence to lifelong dietary management. (1) IMMEDIATE EXPLANATION: (a) PKU is an inherited condition (autosomal recessive) where the body cannot properly break down the amino acid PHENYLALANINE. Phenylalanine naturally occurs in protein-containing foods. (b) If left untreated, phenylalanine accumulates to toxic levels in the blood and brain, causing SEVERE INTELLECTUAL DISABILITY. HOWEVER, with EARLY DETECTION and IMMEDIATE DIETARY MANAGEMENT, the child can develop NORMALLY. (c) This is why newborn screening exists—to catch PKU before symptoms develop and start treatment immediately. (d) The GOOD NEWS: If treatment starts now (before 2 weeks of age), the prognosis is EXCELLENT—the child will have normal intelligence and a completely normal life. This is one of the biggest successes of newborn screening. (2) CONFIRM DIAGNOSIS: Explain that the first blood test showed elevated phenylalanine, but a second test (already sent) is needed to CONFIRM the diagnosis because some infants can have transiently high levels that resolve naturally. Also, a more precise level helps guide treatment intensity. Results should be available within 24–48 hours. (3) IMMEDIATE TREATMENT—DIET: (a) STOP regular infant formula immediately (if currently being used). If breastfeeding, CONTINUE breastfeeding but SUPPLEMENT with a SPECIAL PKU FORMULA (phenylalanine-free formula like Analog or PKU-Aglutella). The PKU formula provides protein without high phenylalanine; breast milk is very low in phenylalanine and can be continued. (b) If exclusively formula-feeding, SWITCH entirely to the special PKU formula. (c) The PKU formula is usually provided at no cost through the newborn screening programme or public health system in the Philippines; advise the parents on how to access it (through the metabolic specialist or newborn screening clinic). (4) LIFELONG DIETARY MANAGEMENT: (a) The GOAL is to maintain blood phenylalanine in a safe range (2–6 mg/dL for infants and young children, ~2–10 mg/dL for older children and adults) by LIMITING dietary phenylalanine while ensuring adequate protein for growth. (b) HIGH-PHENYLALANINE FOODS to avoid or limit: meat, fish, eggs, dairy products (milk, cheese, yogurt), legumes (beans, nuts, peanuts, soy). These are the main dietary protein sources, but they MUST be restricted in PKU. (c) ALLOWED FOODS: fruits, vegetables, low-protein breads (special products made for PKU), non-protein carbohydrates (rice, potatoes, pasta made from special low-protein products). The diet is restrictive but manageable. (d) ARTIFICIAL SWEETENERS—ASPARTAME IS PROHIBITED. Aspartame (found in diet sodas, sugar-free candies, sugar-free chewing gum, some medications) is metabolized to aspartic acid and methanol; critically, some sources metabolize it to PHENYLALANINE. ANY products sweetened with aspartame MUST be AVOIDED. This is a critical teaching point that parents often miss. Use non-aspartame sweeteners (sucralose, stevia, or just avoid sweetened products). (5) MONITORING: (a) Blood phenylalanine levels are checked regularly: monthly in infancy, less frequently as the child grows. Levels must stay in the therapeutic range. (b) A metabolic specialist and paediatric nutritionist help adjust the diet as the child grows, enters school, and transitions to adolescence. (6) LONG-TERM PROGNOSIS: (a) With early detection and STRICT dietary adherence from infancy, children with PKU have NORMAL INTELLIGENCE and NORMAL QUALITY OF LIFE. They can attend regular schools, play sports, have friendships, and develop careers. (b) The diet must be LIFELONG (not just in childhood). Discontinuing the diet in adolescence/adulthood causes intellectual decline and other neurological problems, so adherence throughout life is crucial. (c) SPECIAL CONSIDERATION FOR FEMALES: Teenage girls and women with PKU must maintain VERY STRICT diet during pregnancy because elevated maternal phenylalanine is TERATOGENIC to the fetus—it causes intellectual disability, heart defects, microcephaly (maternal PKU syndrome). Even if the fetus does not have PKU, the fetus is damaged by the high maternal phenylalanine. This is a critical counselling point that should be revisited at appropriate developmental stages. (7) FAMILY EDUCATION: (a) PKU is autosomal recessive; both parents are carriers. If they have more children, each child has a 25% chance of having PKU. Offer genetic counselling if desired. (b) Siblings should also be screened (if not already done through newborn screening). (c) Provide written dietary guidelines, recipes, and support group contacts. Many countries have PKU-specific food products available; advise on how to access them. (d) The parent's support and commitment to the diet is THE MOST CRITICAL FACTOR in the child's outcome. Emphasize that the slightly inconvenient diet now PREVENTS a lifetime of severe disability. (e) Celebrate adherence and developmental progress; the child will develop normally, and the family will adapt to the diet. (8) REFERRAL: Arrange immediate referral to a metabolic specialist and paediatric nutritionist for dietary counselling and ongoing monitoring. The newborn screening clinic should coordinate this.

Diagrams

Paediatric Hematologic, Oncologic & Genetic Disorders: Comprehensive Overview

This mind map provides a comprehensive hierarchical overview of all major paediatric hematologic, oncologic, and genetic disorders covered in the chapter. It organizes concepts by disorder type (hematologic, oncologic, genetic/chromosomal) and shows the key features, pathophysiology, and nursing management priorities for each condition. The map illustrates how disorders cluster around similar management principles (e.g., all bleeding disorders require bleeding precautions) and helps students understand the scope and interconnections of the chapter's content.

Acute Lymphoblastic Leukemia (ALL): Pathophysiology to Nursing Management

This flowchart shows the mechanistic progression from uncontrolled blast proliferation through pancytopenia (anemia, neutropenia, thrombocytopenia) to the two major nursing priorities: infection prevention (neutropenic precautions following from neutropenia) and bleeding prevention (bleeding precautions following from thrombocytopenia). The chart emphasizes that FEVER IN NEUTROPENIA IS A MEDICAL EMERGENCY and highlights the critical nursing interventions (precautions, monitoring, rapid physician notification). It also shows how chemotherapy toxicity management flows from the underlying pancytopenia. This visual helps students understand why certain precautions exist (they directly address the pathophysiology) and reinforces the nursing priority hierarchy: infection and bleeding prevention are life-or-death concerns in ALL.

Sickle Cell Disease Vaso-Occlusive Crisis: HHOP Management Protocol

This flowchart illustrates the mechanistic chain from sickle cell disease pathophysiology (HbS polymerization) through crisis triggers (hypoxia, dehydration, cold, infection) to acute vaso-occlusive crisis (pain) and the HHOP management protocol. The flowchart shows how each intervention (Hydration, Heat, Oxygen, Pain control) directly addresses the underlying pathophysiology and crisis triggers. A CRITICAL safety point is highlighted: NEVER cold (cold PROMOTES sickling—a frequent family misconception). The flowchart also emphasizes prevention (avoiding triggers) and long-term management (hydroxyurea). This visual helps students understand the rationale for each HHOP component and reinforces that the management is scientifically grounded in the disease mechanism.

Paediatric Hematologic, Oncologic & Genetic Disorders is chapter 5 of 6 in the Paediatric Nursing part of Super Tutor's NLE review. The Philippine Nurse Licensure Examination (PNLE) is given by Professional Regulation Commission (PRC) — Board of Nursing; its dates, format and passing rules are on the NLE page. See the NLE guide.

NLE Paediatric Nursing — Paediatric Hematologic, Oncologic & Genetic DisordersSummary

Paediatric Hematologic, Oncologic & Genetic Disorders - Summary

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Diagrams

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