Nokea
A patient with a family history of allergies has suffered an allergic response based on a genetic predisposition. This atopic response is usually mediated by what immunoglobulin?
- A. Immunoglobulin A
- B. Immunoglobulin M
- C. Immunoglobulin G
- D. Immunoglobulin E
Correct Answer: D
Rationale: Atopy refers to allergic reactions characterized by the action of IgE antibodies and a genetic predisposition to allergic reactions.
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A patient is learning about his new diagnosis of asthma with the asthma nurse. What medication has the ability to prevent the onset of acute asthma exacerbations?
- A. Diphenhydramine (Benadryl)
- B. Montelukast (Singulair)
- C. Albuterol sulfate (Ventolin)
- D. Epinephrine
Correct Answer: B
Rationale: Many manifestations of inflammation can be attributed in part to leukotrienes. Medications categorized as leukotriene antagonists or modifiers such as montelukast (Singulair) block the synthesis or action of leukotrienes and prevent signs and symptoms associated with asthma. Diphenhydramine prevents histamines effect on smooth muscle. Albuterol sulfate relaxes smooth muscle during an asthma attack. Epinephrine relaxes bronchial smooth muscle but is not used on a preventative basis.
A patient has been living with seasonal allergies for many years, but does not take antihistamines, stating, When I was young I used to take antihistamines, but they always put me to sleep. How should the nurse best respond?
- A. Newer antihistamines are combined with a stimulant that offsets drowsiness.
- B. Most people find that they develop a tolerance to sedation after a few months.
- C. The newer antihistamines are different than in years past, and cause less sedation.
- D. Have you considered taking them at bedtime instead of in the morning?
Correct Answer: C
Rationale: Unlike first-generation H1 receptor antagonists, newer antihistamines bind to peripheral rather than central nervous system H1 receptors, causing less sedation, if at all. Tolerance to sedation did not usually occur with first-generation drugs and newer antihistamines are not combined with a stimulant.
A child is undergoing testing for food allergies after experiencing unexplained signs and symptoms of hypersensitivity. What food items would the nurse inform the parents are common allergens?
- A. Citrus fruits and rice
- B. Root vegetables and tomatoes
- C. Eggs and wheat
- D. Hard cheeses and vegetable oils
Correct Answer: C
Rationale: The most common causes of food allergies are seafood (lobster, shrimp, crab, clams, fish), legumes (peanuts, peas, beans, licorice), seeds (sesame, cottonseed, caraway, mustard, flaxseed, sunflower seeds), tree nuts, berries, egg white, buckwheat, milk, and chocolate.
The nurse is creating a care plan for a patient suffering from allergic rhinitis. Which of the following outcomes should the nurse identify?
- A. Appropriate use of prophylactic antibiotics
- B. Safe injection of corticosteroids
- C. Improved skin integrity
- D. Improved coping with lifestyle modifications
Correct Answer: D
Rationale: The goals for the patient with allergies may include restoration of normal breathing pattern, increased knowledge about the causes and control of allergic symptoms, improved coping with alterations and modifications, and absence of complications. Antibiotics are not used to treat allergies and corticosteroids, if needed, are not administered parenterally. Allergies do not normally threaten skin integrity.
The nurse in an allergy clinic is educating a new patient about the pathology of the patients health problem. What response should the nurse describe as a possible consequence of histamine release?
- A. Constriction of small venules
- B. Contraction of bronchial smooth muscle
- C. Dilation of large blood vessels
- D. Decreased secretions from gastric and mucosal cells
Correct Answer: B
Rationale: Histamines effects during the immune response include contraction of bronchial smooth muscle, resulting in wheezing and bronchospasm, dilation of small venules, constriction of large blood vessels, and an increase in secretion of gastric and mucosal cells.