NURS 355 Chapter 30

The clinic nurse is evaluating lab results for a child. What recorded hematocrit (Hct) result is considered within the normal range?

40% Normal hematocrit (Hct) is 35% to 45%.

The clinic nurse is evaluating causes for iron deficiency due to impaired iron absorption. What should the nurse recognize as causes for iron deficiency due to impaired iron absorption? (Select all that apply.)

Chronic diarrhea Lactose intolerance Inflammatory bowel disease Causes for iron deficiency due to impaired iron absorption include chronic diarrhea, lactose intolerance, and inflammatory bowel disease. Gastric alkalinity, not acidity, and the presence, not absence, of phosphates can be causes of impaired iron absorption.

What activity should the school nurse recommend for a child with hemophilia A? (Select all that apply.)

Golf Jogging Swimming Children and adolescents with severe hemophilia can participate in noncontact sports such as swimming, golf, walking, jogging, fishing, and bowling. Contact sports such as football, boxing, hockey, soccer, and rugby are strongly discouraged because the risk of injury outweighs the physical and psychosocial benefits of participating in these sports.

A child with hemophilia A is scheduled for surgery. What precautions should the nurse institute with this child?

Handle the child gently when transferring to a cart The goal of prevention of bleeding episodes is directed toward decreasing the risk of injury. The child should be handled carefully when transferring to a cart. Brushing teeth, use of tape, and giving analgesics will not risk a bleeding episode.

A child with sickle cell disease is in a vasoocclusive crisis. What nonpharmacologic pain intervention should the nurse plan?

Heat to the affected area Frequently, heat to the affected area is soothing. Cold compresses are not applied to the area because doing so enhances vasoconstriction and occlusion. Bed rest is usually well tolerated during a crisis, although the actual rest obtained depends a great deal on pain alleviation and the use of organized schedules of nursing care. Although the objective of bed rest is to minimize oxygen consumption, some activity, particularly passive range of motion exercises, is beneficial to promote circulation. Usually the best course is to let children determine their activity tolerance. Elevating the extremity will not help in sickle cell disease.

The clinical manifestations of sickle cell anemia (SCA) are primarily the result of which physiologic alteration?

Increased RBC destruction The clinical features of SCA are primarily the result of increased RBC destruction and obstruction caused by the sickle-shaped RBCs. When the sickle cells change shape, they increase the viscosity in the area where they are involved in the microcirculation. SCA does not have a coagulation deficit. Sickled red cells have decreased oxygen-carrying capacity and transform into the sickle shape in conditions of low oxygen tension.

What statement best describes β-thalassemia major (Cooley anemia)?

Increased incidence occurs in families of Mediterranean extraction Individuals who live near the Mediterranean Sea and their descendants have the highest incidence of thalassemia. Thalassemia is inherited as an autosomal recessive disorder. An overproduction of RBCs occurs. Although numerous, the red blood cells are relatively unstable. Sickle cell disease is common in blacks of West African descent.

A 5-year-old child is admitted to the hospital in a sickle cell crisis. The child has been alert and oriented but in severe pain. The nurse notes that the child is complaining of a headache and is having unilateral hemiplegia. What action should the nurse implement?

Notify the health care provider Any number of neurologic symptoms can indicate a minor cerebral insult, such as headache, aphasia, weakness, convulsions, visual disturbances, or unilateral hemiplegia. Loss of vision is usually the result of progressive retinopathy and retinal detachment. The nurse should notify the health care provider.

The nurse is caring for a 14-year-old child with disseminated intravascular coagulation (DIC). What clinical manifestations should the nurse expect to observe? (Select all that apply.)

Petechiae Bleeding from openings in the skin Hypotension Purpura Some clinical manifestations of DIC are petechiae, bleeding from openings in the skin, hypotension, and purpura. Hepatosplenomegaly and chronic diarrhea are clinical manifestations of human immunodeficiency virus (HIV) infection in children.

The nurse is caring for a school-age child with severe anemia and activity intolerance. What diversional activity should the nurse plan for this child?

Playing board or card games Plan diversional activities that promote rest but prevent boredom and withdrawal. Because short attention span, irritability, and restlessness are common in anemia and increase stress demands on the body, plan appropriate activities such as playing board or card games. Playing a musical instrument, participating in a game of table tennis, or decorating the hospital room would cause undue exertion.

The nurse is teaching a parent of an infant to limit the amount of formula to encourage the intake of iron-rich food. What amount should the nurse teach to the parent?

1000 mL The nurse should teach the parent to limit the amount of formula to no more than 1 1/day to encourage intake of iron-rich solid foods.

The clinic nurse is evaluating lab results for a child. What recorded hemoglobin (Hgb) result is considered within the normal range?

12 g/dl Normal hemoglobin (Hgb) determination is 11.5 to 15.5 g/dl.

The nurse is preparing to administer a unit of packed red blood cells to a hospitalized child. What is an appropriate action that applies to administering blood?

Administer the first 50 mL of blood slowly and stay with the child The nurse should administer the first 50 ml of blood or initial 20% of volume (whichever is smaller) slowly and stay with the child. Vitals signs should be taken 15 minutes after initiation and then every hour, not every 15 minutes. Blood should be used within 30 minutes, not 1 hour. Normal saline, not 5% glucose, should be the IV solution.

The nurse is caring for a 12-year-old child with β-thalassemia. What clinical manifestations should the nurse expect to observe? (Select all that apply.)

Anorexia Unexplained fever Enlarged spleen or liver Bronzed, freckled complexion The clinical manifestations of β-thalassemia include anorexia; unexplained fever; an enlarged spleen or liver; and a bronzed, freckled complexion. There is delayed sexual maturation, not precocious.

In which condition are all the formed elements of the blood simultaneously depressed?

Aplastic anemia Aplastic anemia refers to a bone marrow failure condition in which the formed elements of the blood are simultaneously depressed. Sickle cell anemia is a hemoglobinopathy in which normal adult hemoglobin is partly or completely replaced by abnormal sickled hemoglobin. Thalassemia major is a group of blood disorders characterized by deficiency in the production rate of specific hemoglobin chains. Iron-deficiency anemia results in a decreased amount of circulating red cells.

A toddler is diagnosed with chronic benign neutropenia. The parents are being taught about caring for their child. What information is important to include?

Avoid large indoor crowds and people who are ill The parents are taught to minimize risk of infection by avoiding crowded areas and individuals who are ill. Parents are also cautioned about when to notify their practitioner and administration of granulocyte colony-stimulating factor, if indicated. Antibiotics are not needed unless the child has an infection. The toddler does not need any additional rest as a result of the neutropenia. Corticosteroids are not indicated.

The nurse is preparing a community outreach program about the prevention of iron-deficiency anemia in infants. What statement should the nurse include in the program?

Breast milk or iron-fortified formula should be used for the first 12 months. Prevention, the primary goal in iron-deficiency anemia, is achieved through optimal nutrition and appropriate iron supplements. The American Academy of Pediatrics recommends feeding an infant only breast milk or iron-fortified formula for the first 12 months of life. Whole cow's milk should not be introduced until after 12 months, iron supplements can be given during the first year of life, and iron-fortified cereals should not be introduced until the infant is 4 to 6 months old.

The school nurse is informed that a child with human immunodeficiency virus (HIV) infection will be attending school soon. What is an important nursing intervention to include in the plan of care?

Carefully follow universal precautions Universal precautions are necessary to prevent further transmission of the disease. Informing the parents of the other children would violate the child's right to privacy. It is not within the role of the school nurse to determine how the child became infected. Reassuring other children that they will not become infected violates the child's privacy. General health classes can discuss prevention of HIV transmission.

The nurse is administering a unit of blood to a child. What are signs and symptoms of a transfusion reaction? (Select all that apply.)

Chills Shaking Flank pain Sudden severe headache Signs and symptoms of a transfusion reaction include chills, shaking, flank pain, and sudden severe headache. Hyperthermia, not hypothermia, occurs.

An 8-year-old girl is receiving a blood transfusion when the nurse notes that she has developed precordial pain, dyspnea, distended neck veins, slight cyanosis, and a dry cough. These manifestations are most suggestive of what complication?

Circulatory overload The signs of circulatory overload include distended neck veins, hypertension, crackles, a dry cough, cyanosis, and precordial pain. Signs of air embolism are sudden difficulty breathing, sharp pain in the chest, and apprehension. Urticaria, pruritus, flushing, asthmatic wheezing, and laryngeal edema are signs and symptoms of allergic reactions. Hemolytic reactions are characterized by chills, shaking, fever, pain at infusion site, nausea, vomiting, tightness in chest, flank pain, red or black urine, and progressive signs of shock and renal failure.

What statement best describes iron deficiency anemia in infants?

Clinical manifestations are related to a reduction in the amount of oxygen available to tissues. In iron-deficiency anemia, the child's clinical appearance is a result of the anemia, not the underlying cause. Usually the hematopoietic system is not depressed. The bone marrow produces red blood cells that are smaller and contain less hemoglobin than normal red blood cells. Children who have iron deficiency from drinking excessive quantities of milk are usually pale and overweight. They are receiving sufficient calories but are deficient in essential nutrients. The clinical manifestations result from decreased intake of iron-fortified solid foods and an excessive intake of milk.

What physiologic defect is responsible for causing anemia?

Decreased oxygen-carrying capacity of blood Anemia is a condition in which the number of red blood cells or hemoglobin concentration is reduced below the normal values for age. This results in a decreased oxygen-carrying capacity of blood. Increased blood viscosity is usually a function of too many cells or of dehydration, not of anemia. A depressed hematopoietic system or abnormal hemoglobin can contribute to anemia, but the definition depends on the decreased oxygen-carrying capacity of the blood.

A young child with human immunodeficiency virus (HIV) is receiving several antiretroviral drugs. What is the purpose of these drugs?

Delay disease progression Although not a cure, these antiretroviral drugs can suppress viral replication, preventing further deterioration of the immune system, and delay disease progression. At this time, cure is not possible. Antiretroviral drugs do not prevent the spread of the disease. P. carinii prophylaxis is accomplished with antibiotics.

For children who do not have a matched sibling bone marrow donor, the therapeutic management of aplastic anemia includes what intervention?

Immunosuppressive therapy It is thought that aplastic anemia may be an autoimmune disease. Immunosuppressive therapy, including antilymphocyte globulin, antithymocyte globulin, cyclosporine, granulocyte colony-stimulating factor, and methylprednisone, has greatly improved the prognosis for patients with aplastic anemia. Antibiotics are not indicated as the management. They may be indicated for infections. Antiretroviral drugs and iron supplementation are not part of the therapy.

A child with sickle cell anemia (SCA) develops severe chest and back pain, fever, a cough, and dyspnea. What should be the first action by the nurse?

Notify the practitioner because chest syndrome is suspected These are the symptoms of chest syndrome, which is a medical emergency. Notifying the practitioner is the priority action. Oxygen may be indicated; however, it does not reverse the sickling that has occurred. Antibiotics are not indicated initially. Pain medications may be required, but evaluation by the practitioner is the priority.

What are signs and symptoms of anemia? (Select all that apply.)

Pallor Fatigue Muscle weakness Signs and symptoms of anemia include, pallor, fatigue, and muscle weakness. Tachycardia, not bradycardia, and dark urine, not dilute, are signs and symptoms of anemia.

The nurse is planning care for an adolescent with acquired immunodeficiency syndrome. What is the priority nursing goal?

Prevent infection As a result of the immunocompromise that is associated with human immunodeficiency virus (HIV) infection, the prevention of infection is paramount. Although certain precautions are justified in limiting exposure to infection, these must be balanced with the concern for the child's normal developmental needs. Preventing secondary cancers is not currently possible. Case finding is not a priority nursing goal in planning care for an individual. Current drug therapy is affecting the disease progression; although not a cure, these drugs can suppress viral replication, preventing further deterioration but not actually restoring immunologic defenses.

The nurse is teaching the family of a child, age 8 years, with moderate hemophilia about home care. What should the nurse tell the family to do to minimize joint injury?

Provide intravenous (IV) infusion of factor VIII concentrates. Parents are taught home infusion of factor VIII concentrate. For moderate and severe hemophilia, prompt IV administration is essential to prevent joint injury. NSAIDs are effective for pain relief. They must be given with caution because they inhibit platelet aggregation. A factor VIII level of 30% is necessary to stop bleeding. DDAVP can raise the factor VIII level fourfold. Moderate hemophilia is defined by a factor VIII activity of 4.9. A fourfold increase would not meet the 30% level. Ice and elevation are important adjunctive therapy, but factor VIII is necessary.

What information should the nurse include when teaching the mother of a 9-month-old infant about administering liquid iron preparations?

Adequate dosage will turn the stools a tarry green color The nurse should prepare the mother for the anticipated change in the child's stools. If the iron dose is adequate, the stools will become a tarry green color. A lack of color change may indicate insufficient iron. The iron should be given in two divided doses between meals when the presence of free hydrochloric acid is greatest. Iron is absorbed best in an acidic environment. Vomiting and diarrhea may occur with iron administration. If these occur, the iron should be given with meals, and the dosage reduced and gradually increased as the child develops tolerance. Liquid preparations of iron stain the teeth; they should be administered through a straw and the mouth rinsed after administration.

In a child with sickle cell anemia (SCA), adequate hydration is essential to minimize sickling and delay the vasoocclusion and hypoxia-ischemia cycle. What information should the nurse share with parents in a teaching plan?

Check for moist mucous membranes Children with SCA have impaired kidney function and cannot concentrate urine. Parents are taught signs of dehydration and ways to minimize loss of fluid to the environment. Encouraging drinking is not specific enough for parents. The nurse should give the parents and child a target fluid amount for each 24-hour period. Accurate monitoring of output may not reflect the child's fluid needs. Without the ability to concentrate urine, the child needs additional intake to compensate. Dilute urine and specific gravity are not valid signs of hydration status in children with SCA.

What explanation provides the rationale for why iron-deficiency anemia is common during infancy?

Cow's milk is a poor source of iron Children between the ages of 12 and 36 months are at risk for anemia because cow's milk is a major component of their diet, and it is a poor source of iron. Iron is stored during fetal development, but the amount stored depends on maternal iron stores. Fetal iron stores are usually depleted by ages 5 to 6 months. Dietary iron can be introduced by breastfeeding, iron-fortified formula, and cereals during the first 12 months of life.

What medication is classified as an antiretroviral?

Didanosine (Videx) Classes of antiretroviral agents include nucleoside reverse transcriptase inhibitors (e.g., zidovudine, didanosine, stavudine, lamivudine, abacavir), nonnucleoside reverse transcriptase inhibitors (e.g., nevirapine, delavirdine, efavirenz), and protease inhibitors (e.g., indinavir, saquinavir, ritonavir, nelfinavir, amprenavir, lopinavir, ritonavir). Dapsone, pentamidine, and Bactrim are anti-infectives.

What immunoglobulin pattern does the nurse expect in a child recently diagnosed with Wiskott-Aldrich syndrome?

Diminished levels of IgM The level of IgM is diminished early in the course of the disease, but levels of IgG, IgA, and IgE may be elevated initially.

The parents of a child with sickle cell anemia (SCA) are concerned about subsequent children having the disease. What statement most accurately reflects inheritance of SCA?

Each sibling has a 25% chance of having SCA SCA is inherited as an autosomal recessive disorder. In this inheritance pattern, each child born to these parents has a 25% chance of having the disorder, a 25% chance of having neither SCA nor the trait, and a 50% chance of being heterozygous for SCA (sickle cell trait). SCA is an inherited hemoglobinopathy.

Nursing strategies to improve the growth and development of the child with human immunodeficiency virus (HIV) infection should include what?

Fortify foods with nutritional supplements to maximize quality of intake. HIV infection often leads to marked failure to thrive and multiple nutritional deficiencies. Nutritional management may be difficult because of recurrent illness, diarrhea, and other physical problems. The nurse should implement intensive nutritional interventions if the child's growth begins to slow or weight begins to decrease. Fortifying foods with nutritional supplements will maximize quality of intake. The child does not need to be weighed daily, and high-fat meals and snacks should not be encouraged.

What therapeutic intervention is most appropriate for a child with β-thalassemia major?

Frequent blood transfusions The goal of medical management is to maintain sufficient hemoglobin (>9.5 g/dl) to prevent bone marrow expansion. This is achieved through a long-term transfusion program. Oxygen therapy and adequate hydration are not beneficial in the overall management of thalassemia. The child does not require supplemental iron. Iron overload is a problem because of frequent blood transfusions, decreased production of hemoglobin, and increased absorption from the gastrointestinal tract.

The nurse is preparing to admit a 4-year-old child with chronic benign neutropenia. What clinical features of chronic benign neutropenia should the nurse recognize? (Select all that apply.)

Gingivitis is present Anemia is not present Monocytosis is present The clinical features of chronic benign neutropenia include gingivitis, no anemia, and monocytosis. It is not inherited, and because it is benign, it does not require treatment except antibiotics as indicated.

A school-age child is admitted in vasoocclusive sickle cell crisis (pain episode). The child's care should include which therapeutic interventions?

Hydration and pain management The management of crises includes adequate hydration, pain management, minimization of energy expenditures, electrolyte replacement, and blood component therapy if indicated. Factor VIII is not indicated in the treatment of vasoocclusive sickle cell crisis. Oxygen may prevent further sickling, but it is not effective in reversing sickling because it cannot reach the clogged blood vessels. Also, prolonged oxygen can reduce bone marrow activity. Heparin is not indicated in the treatment of vasoocclusive sickle cell crisis. Electrolyte replacement should accompany hydration. The acidosis will be corrected as the crisis is treated. Energy expenditure should be minimized to improve oxygen utilization. Acidosis, not alkalosis, results from hypoxia, which also promotes sickling.

Care for the child with acute idiopathic thrombocytopenic purpura (ITP) includes which therapeutic intervention?

IV administration of anti-D antibody Anti-D antibody causes an increase in platelet count approximately 48 hours after administration. Splenectomy is reserved for chronic severe ITP not responsive to pharmacologic management. NSAIDs are not used in ITP. Both NSAIDs and aspirin interfere with platelet aggregation. The nurse works with the child and parents to choose quiet activities while the platelet count is below 100,000/mm3.

What condition is an acquired hemorrhagic disorder that is characterized by excessive destruction of platelets?

Idiopathic thrombocytopenic purport Idiopathic thrombocytopenic purpura is an acquired hemorrhagic disorder characterized by an excessive destruction of platelets, discolorations caused by petechiae beneath the skin, and normal bone marrow. Aplastic anemia refers to a bone marrow failure condition in which the formed elements of the blood are simultaneously depressed. Thalassemia major is a group of blood disorders characterized by deficiency in the production rate of specific hemoglobin chains. Disseminated intravascular coagulation is characterized by diffuse fibrin deposition in the microvasculature, consumption of coagulation factors, and endogenous generation of thrombin and plasma.

A child with severe anemia requires a unit of red blood cells (RBCs). The nurse explains to the child that the transfusion is necessary for which reason?

Increase her energy so she will not be so tired The indication for RBC transfusion is risk of cardiac decompensation. When the number of circulating RBCs is increased, tissue hypoxia decreases, cardiac function is improved, and the child will have more energy. Parental visiting is not dependent on transfusion. The decrease in tissue hypoxia will minimize the risk of infection. There is no evidence that the child is currently infected. Forming a clot is the function of platelets.

Iron overload is a side effect of chronic transfusion therapy. What treatment assists in minimizing this complication?

Infusion of deferoxamine Deferoxamine infusions in combination with vitamin C allow the iron to remain in a more chelatable form. The iron can then be excreted more easily. Use of magnets does not remove additional iron from the body. Hemoglobin electrophoresis is used to confirm the diagnosis of hemoglobinopathies; it does not affect iron overload. Washed RBCs remove white blood cells and other proteins from the unit of blood; they do not affect the iron concentration.

What pain medication is contraindicated in children with sickle cell disease (SCD)?

Meperidine (Demerol) Meperidine (pethidine [Demerol]) is not recommended. Normeperidine, a metabolite of meperidine, is a central nervous system stimulant that produces anxiety, tremors, myoclonus, and generalized seizures when it accumulates with repetitive dosing. Patients with SCD are particularly at risk for normeperidine-induced seizures.

A mother states that she brought her child to the clinic because the 3-year-old girl was not keeping up with her siblings. During physical assessment, the nurse notes that the child has pale skin and conjunctiva and has muscle weakness. The hemoglobin on admission is 6.4 g/dl. After notifying the practitioner of the results, what nursing priority intervention should occur next?

Minimize energy expenditure to decrease cardiac workload. The child has a critically low hemoglobin value. The expected range is 11.5 to 15.5 g/dl. When the oxygen-carrying capacity of the blood decreases slowly, the child is able to compensate by increasing cardiac output. With the increasing workload of the heart, additional stress can lead to cardiac failure. Reduction of environmental stimulation can help minimize energy expenditure, but seizures are not a risk. A repeat hemoglobin analysis is not necessary. The child does not have evidence of dehydration. If intravenous fluids are given, they can further dilute the circulating blood volume and increase the strain on the heart.

The nurse is preparing to admit a 1-month-old infant with severe congenital neutropenia (Kostmann disease). What clinical features of severe congenital neutropenia should the nurse recognize? (Select all that apply.)

Neutropenia is present The illness is severe The clinical features of severe congenital neutropenia include anemia and neutropenia, and the illness is severe. It has an autosomal recessive inheritance pattern, and there are increased, not decreased, eosinophils in the bone marrow.

A child with hemophilia A will have which abnormal laboratory result?

PTT (partial thromboplastin time) The basic defect of hemophilia A is a deficiency of factor VIII. The partial thromboplastin time measures abnormalities in the intrinsic pathway (abnormalities in factors I, II, V, VIII, IX, X, XII, HMK, and KAL). The prothrombin time measures abnormalities of the extrinsic pathway (abnormalities in factors I, II, V, VII, and X). Fibrinogen level is not dependent on the intrinsic pathway. Platelets are not affected with hemophilia A.

The nurse is caring for a child with hemophilia A. The child's activity is as tolerated. What activity is contraindicated for this child?

Passive ROM exercises Passive range of motion exercises should never be part of an exercise regimen after an acute episode because the joint capsule could easily be stretched and bleeding could recur. Active range of motion exercises are best so that the patient can gauge his or her own pain tolerance. The child can ambulate to the playroom or the cafeteria.

Therapeutic management of a 6-year-old child with hereditary spherocytosis (HS) should include which therapeutic intervention?

Perform a splenectomy Splenectomy corrects the hemolysis that occurs in HS. The splenectomy is generally reserved for children older than age 5 years with symptomatic anemia. Supplementation with calcium does not affect the HS. Additional folic acid can prevent deficiency caused by the rapid cell turnover. A maintenance transfusion program suppresses red blood cell formation. At this time, the risks of transfusion are greater than those of a splenectomy. Iron supplementation does not influence the course of HS.

The majority of children in the United States with human immunodeficiency virus (HIV) infection acquired the disease by which means?

Perinatally from their mothers More than 90% of the children with HIV under 13 years who were reported to the Centers for Disease Control and Prevention acquired the infection during the perinatal period. With intervention, the number of children infected can be decreased. Sexual contact and IV drug use are the leading causes of infection in the 14- to 19-year age group. This number is less than the number of cases in the under 13-year age group. Transfusion has accounted for 3% to 6% of all pediatric acquired immunodeficiency syndrome cases to date. Before 1985 and routine screening of donated blood products, children with hemophilia were at great risk from pooled plasma products.

The clinic nurse is evaluating causes for iron deficiency caused by inadequate supply of iron. What should the nurse recognize as causes for iron deficiency caused by an inadequate iron supply? (Select all that apply.)

Prematurity Excessive milk intake Severe iron deficiency in the mother Causes for iron deficiency caused by an inadequate supply of iron include prematurity, excessive milk intake, and severe iron deficiency in the mother. Rapid growth rate, not slow, and exclusive breastfeeding of infant after 6 months, not from birth to 3 months, can be causes of inadequate supply of iron.

In anticipation of the admission of a child with hereditary spherocytosis (HS) who is experiencing an aplastic crisis, what action should the nurse plan?

Prepare for a transfusion of packed RBC In hereditary spherocytosis, aplastic crisis results in a sudden cessation of RBC production by the bone marrow. Hemoglobin and hematocrit values drop rapidly, which results in severe anemia. Transfusion support may be needed, and close monitoring of the child's cardiovascular status is necessary. The nurse should prepare for a transfusion of packed red blood cells initially. An isolation room is not needed, splenectomy would not be done at this time, and the child will not be in shock.

What condition precipitates polycythemia?

Prolonged tissue hypoxia Oxygen transport depends on both the number of circulating RBCs and the amount of normal hemoglobin in the cell. This explains why polycythemia (increase in the number of erythrocytes) occurs in conditions characterized by prolonged tissue hypoxia, such as cyanotic heart defects. Dehydration, severe infections, or immunosuppression will not precipitate polycythemia.

What rationale explains why prolonged use of oxygen should be discouraged in a child with anemia?

Prolonged use of oxygen can decrease erythropoiesis Oxygen administration is of limited value, because each gram of hemoglobin is able to carry a limited amount of the gas. In addition, prolonged use of supplemental oxygen can decrease erythropoiesis. Prolonged use of oxygen does not interfere with iron production, a child's appetite, or affect the synthesis of hemoglobin.

What condition is an inherited immunodeficiency disorder characterized by absence of both humoral and cell-mediated immunity?

Severe combined immunodeficiency syndrome SCIDS is a genetic disorder that results in deficits of both humoral and cellular immunity. Fanconi syndrome is a hereditary disorder of red blood cell production. Wiskott-Aldrich syndrome is an X-linked recessive disorder with selected deficiencies of T and B lymphocytes. AIDS is not inherited.

What condition occurs when the normal adult hemoglobin is partly or completely replaced by abnormal hemoglobin?

Sickle cell anemia Sickle cell anemia is one of a group of diseases collectively called hemoglobinopathies, in which normal adult hemoglobin is replaced by abnormal hemoglobin. Aplastic anemia is a lack of cellular elements being produced. Thalassemia major refers to a variety of inherited disorders characterized by deficiencies in production of certain globulin chains. Iron-deficiency anemia affects red blood cell size and depth of color but does not involve abnormal hemoglobin.

The nurse is teaching parents of a child being discharged from the hospital after a splenectomy about the risk of infection. What should the nurse include in the teaching session? (Select all that apply.)

The child should receive prophylactic penicillin for certain procedures. Have the child immunized with the Haemophilus influenzae type b vaccination. Notify the health care provider if your child develops a fever of 38.5° C (101.3° F). Because of the risk of life-threatening bacterial infection after splenectomy, these children are immunized with the pneumococcal, meningococcal, and H. influenzae type b vaccines before surgery and receive prophylactic penicillin for several years after splenectomy. The parents should be instructed in the importance of seeking immediate medical attention if their child develops a fever of 38.5° C (101.3° F) or higher as a common sign of infection or postsplenectomy sepsis.

The regulation of red blood cell (RBC) production is thought to be controlled by which physiologic factor?

Tissue hypoxia Hemoglobin does not directly control RBC production. If there is insufficient hemoglobin to adequately oxygenate the tissue, then erythropoietin may be released. When tissue hypoxia occurs, the kidneys release erythropoietin into the bloodstream. This stimulates the marrow to produce new RBCs. Reticulocytes are immature RBCs. The "retic" count can be used to monitor hematopoiesis. The number of RBCs does not directly control production. In congenital cardiac disorders with mixed blood flow or decreased pulmonary blood flow, RBC production continues secondary to tissue hypoxia.

What statement is descriptive of most cases of hemophilia?

X-linked recessive inherited disorder in which a blood clotting factor is deficient The inheritance pattern in 80% of all the cases of hemophilia is X-linked recessive. The two most common forms of the disorder are factor VIII deficiency (hemophilia A, or classic hemophilia) and factor IX deficiency (hemophilia B, or Christmas disease). The disorder involves coagulation factors, not platelets. The disorder does not involve red blood cells or the Y chromosome.