The Child with Hematologic or Immunologic Disorders Flashcards
Exam 3
Functions of the Hematologic System
Erythrocytes or red blood cells (RBCs): What do they do?
Transport nutrients and oxygen to the body tissues
Transport waste products from the tissues
Functions of the Hematologic System
Thrombocytes or platelets: What do they do?
Clotting
Functions of the Hematologic System
Leukocytes or white blood cells (WBCs): What do they do?
Fight infection
Types of Anemia: What are they?
Nutritional deficiency
Toxin exposure
Aplastic anemia
Hemolytic anemia
Types of Anemia:
What are the types of Nutritional deficiency anemias?
Iron deficiency,
folic acid deficiency,
pernicious anemia
Types of Anemia:
What are the types of Toxin exposure
anemias?
Lead poisoning
Types of Anemia:
What is Aplastic Anemia? How is it acquired?
Acquired as an adverse reaction to medication
Rare congenital bone marrow failure (Fanconi anemia)
Types of Anemia
Hemolytic anemia include?
Sickle cell anemia,
Thalassemias
Components of the Complete Blood Count (CBC) include?
RBC count
Hemoglobin (Hgb)
Hematocrit (Hct)
RBC indices
WBC count
Platelet count
Mean platelet volume (MPV)
Components of the Complete Blood Count (CBC): RBC count
Actual number of counted RBCs
Components of the Complete Blood Count (CBC): Hemoglobin (Hgb)
Measure of the protein made up of heme and globin
Components of the Complete Blood Count (CBC): Hematocrit (Hct)
Indirect measure of red blood cells
Components of the Complete Blood Count (CBC):
RBC indices
Cell diameter,
Hgb/RBC
Components of the Complete Blood Count (CBC)
WBC count
Actual count of the number of WBCs in a volume of blood
Components of the Complete Blood Count (CBC)
Platelet count
Number of platelets per blood volume
Components of the Complete Blood Count (CBC)
Mean platelet volume (MPV)
Measurement of the size of the platelets
What is the most common hematological disorder of childhood?
RED BLOOD CELL DISORDERSAnemia
RED BLOOD CELL DISORDERS/ Anemia:
What is it?
Decrease in number of RBCs and/or hemoglobin concentration below normal
RED BLOOD CELL DISORDERSsAnemia
What is a defining trait of it?
Decreased oxygen-carrying capacity of blood
RED BLOOD CELL DISORDERSsAnemia
Classification of Anemias-how?
Etiology and physiology
Morphology
RED BLOOD CELL DISORDERSsAnemia
Classification of Anemias: Etiology and physiology
RBC and/or Hgb depletion
RED BLOOD CELL DISORDERSsAnemia
Classification of Anemias: Morphology
Characteristic changes in RBC size, shape, and/or color
Effects of Anemia on Circulatory System include:
Hemodilution
Decreased peripheral resistance
Increased cardiac circulation and turbulence
Growth issues
Effects of Anemia on Circulatory System include:
Increased cardiac circulation and turbulence can lead to what?
Also, what can it lead to?
May have murmur
May lead to cardiac failure
Diagnostic Evaluation
Screening CBC for pediatric patients across childhood (U.S. recommendations)
Diagnostic Evaluation
Screening CBC for pediatric patients across childhood (U.S. recommendations)
What should be put into practice?
Put Prevention into Practice program for the U.S. Public Health Service
American Academy of Family Physicians and U.S. Preventive Services Task Force
American Academy of Pediatrics
Diagnostic Evaluation
Screening CBC for pediatric patients across childhood (U.S. recommendations)
When should hemoglobin concentration or hematocrit be measured?
AAP- Hemoglobin concentration or hematocrit should be measured once during infancy (between 9-12 months), early childhood (1-5 years), late childhood (5-12 years), and adolescence (14-20 years).
Therapeutic Management
Treat underlying cause
Nutritional intervention for deficiency anemias
Supportive care
Therapeutic Management:
Treat underlying cause: What is needed ?
Transfusion after hemorrhage if needed
Therapeutic Management:
Transfusion after hemorrhage if needed
Treat underlying cause:
The indication for RBC transfusion is risk of:
The indication for RBC transfusion is risk of cardiac decompensation
Therapeutic Management:
Treat underlying cause:
Transfusion after hemorrhage if needed
What happens when the number of circulating RBCs is increased?
When the number of circulating RBCs is increased, tissue hypoxia decreases, cardiac function is improved, and the child will have more energy
Therapeutic Management
Supportive care: What is needed?
IV fluids to replace intravascular volume
Oxygen
Bed rest
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:Iron Deficiency Anemia- What is it caused by?
Caused by inadequate supply of dietary iron
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:Iron Deficiency Anemia- How is it viewed?
Generally is preventable
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:Iron Deficiency Anemia- How can iron be ingested for infants?
Iron-fortified cereals and formulas for infants
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:Iron Deficiency Anemia-
Special needs of premature infants
Use only breast milk or iron-fortified formula (containing 7 to 12 mg/L for full-term infants and 15 mg/L for preterm infants of iron) for the first 12 months.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:Iron Deficiency Anemia-Why are adolescents at risk?
Adolescents at risk due to rapid growth and poor eating habits
What is the most prevalent nutritional disorder in the United States and the most common mineral disturbance?
Iron Deficiency Anemia
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia- What does this anemia affect?
Iron deficiency anemia affects red cell size and depth of color but does not involve abnormal hemoglobin.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia- What can cause it (what factors)
Iron deficiency anemia can be caused by any number of factors that decrease the supply of iron, impair its absorption, increase the body’s need for iron, or affect the synthesis of hemoglobin.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia- Why are children ages 12-36 months of age at risk?
Children 12 to 36 months of age are at risk for anemia because cow’s milk is a staple of their diet and it is a poor source of iron.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia-How is iron during fetal development? What does it depend on?
Iron is stored during fetal development, but the amount stored depends on maternal iron stores.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia-When are fetal iron stores depleted?
Fetal iron stores are usually depleted by ages 5 to 6 months.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia-How can dietary iron be introduced?
Dietary iron can be introduced by breast-feeding, iron-fortified formula, and cereals during the first 12 months of life.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia-What is the nurse’s main goal?
The main nursing goal in prevention of nutritional anemia is parent education regarding correct feeding practices.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia-What should the nurse prepare parents about when giving iron?
If administering iron- The nurse should prepare the mother for the anticipated change in the child’s stools.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia-If iron dose given is adequate, how should stool appear?
What may a lack of color change indicate?
If the iron dose is adequate, the stools will become a tarry green color.
A lack of color change may indicate insufficient iron.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia-How should iron be administered?
How is iron best absorbed?
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.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia-What may occur with iron administration?
Vomiting and diarrhea may occur with iron administration.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia- If Vomiting and diarrhea occur with iron administration, what should be done?
If these occur, the iron should be given with meals, and the dosage reduced and gradually increased as the child develops tolerance.
ANEMIA CAUSED BY NUTRITIONAL DEFICIENCIES:
Iron Deficiency Anemia- What do liquid preparations of iron do? So what should be done?
Liquid preparations of iron stain the teeth; they should be administered through a straw and the mouth rinsed after administration.
Foods Rich in Iron
Red meats (easiest for the body to absorb)
Tuna and salmon
Eggs
Tofu
Enriched grains
Dried beans, peas, and fruits
Leafy green vegetables
Iron-fortified breakfast cereals
Lead Poisoning :Sources of Lead
Paint in homes built before 1978
Dust from windowsills, walls, and plaster in older homes
Soil from sites where cars that used leaded gas had been parked
Glazed pottery and stained glass products
Lead pipes supplying water to the home
On the clothing of parents who work in certain manufacturing jobs.
Certain folk remedies, such as greta or arzacon
Old painted toys or furniture
Complications of Lead Poisoning:
Lower levels (high but on the lower level)
Behavioral problems
Learning difficulties
Complications of Lead Poisoning:
Higher levels (requires chelation treatment)
Seizures
Brain damage
Types of Hemoglobinopathies
Sickle cell anemia
Hemoglobin SC disease
Types of Hemoglobinopathies:
Hemoglobin SC disease: What are they?
α-Thalassemia
β-Thalassemia
Sickle Cell Anemia: What is it?
A hereditary hemoglobinopathy
Sickle Cell Anemia: Ethnicity- Who does it occur in primarily?
Occurs primarily in African-Americans
Occasionally also in people of Mediterranean descent
Also seen in South American, Arabian, and East Indian descent
Sickle Cell Anemia: What kind of disorder is it considered?
Autosomal recessive disorder
Sickle Cell Anemia: Autosomal recessive disorder
How many people are carriers
1 in 12 African-Americans are carriers (have sickle cell trait)
Sickle Cell Anemia: Autosomal recessive disorder
If both parents have trait, what does that mean?
If both parents have trait, each offspring will have 1 in 4 likelihood of having disease
Sickle Cell Anemia: Where would individuals with sickle cell trait have a survival advantage?
In areas of the world where malaria is common, individuals with sickle cell trait tend to have a survival advantage over those without the trait.
Sickle Cell Anemia:
A hereditary hemoglobinopathy- What does this mean?
hemoglobinopathies, in which normal adult hemoglobin is replaced by abnormal hemoglobin.
Sickle Cell Anemia Pathophysiology- What occurs?
Large tissue infarctions occur
Damaged tissues in organs lead to impaired function