A patient with a tracheostomy has difficulty removing excessive, thick mucus from the respiratory tract. The nurse expects that which drug will be ordered to aid in the removal of mucus?
Benzonatate
Guaifenesin
Diphenhydramine
Dextromethorphan
The Correct Answer is B
Choice A reason: Benzonatate is not the correct answer. Benzonatate is a cough suppressant that works by numbing the throat and lungs. It does not help in the removal of mucus.
Choice B reason: Guaifenesin is the correct answer. Guaifenesin is an expectorant that works by thinning and loosening the mucus in the airways. It helps in the removal of mucus by making it easier to cough up.
Choice C reason: Diphenhydramine is not the correct answer. Diphenhydramine is an antihistamine that works by blocking the effects of histamine, a chemical that causes allergy symptoms. It does not help in the removal of mucus.
Choice D reason: Dextromethorphan is not the correct answer. Dextromethorphan is a cough suppressant that works by affecting the signals in the brain that trigger the cough reflex. It does not help in the removal of mucus.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is B
Explanation
Choice A reason: This is incorrect because orally administered decongestants do not have an immediate onset. They take longer to act than nasal sprays because they have to be absorbed through the gastrointestinal tract. Nasal sprays act directly on the nasal mucosa and have a faster onset.
Choice B reason: This is correct because orally administered decongestants do not cause rebound congestion. Rebound congestion is a condition in which the nasal passages become more swollen and congested after the effect of the nasal spray wears off. This can lead to overuse and dependence on the nasal spray. Orally administered decongestants do not have this effect because they act systemically and not locally.
Choice C reason: This is incorrect because orally administered decongestants do not have a shorter duration. They have a longer duration than nasal sprays because they are metabolized more slowly by the liver. Nasal sprays have a shorter duration because they are eliminated more quickly by the nasal mucosa.
Choice D reason: This is incorrect because orally administered decongestants are not more potent than nasal sprays. They have a similar potency, but they have a different mechanism of action. Orally administered decongestants act on the alpha-adrenergic receptors in the blood vessels, causing vasoconstriction and reducing congestion. Nasal sprays act on the beta-adrenergic receptors in the bronchial smooth muscle, causing bronchodilation and improving airflow.
Correct Answer is B
Explanation
Choice A reason: This is incorrect because hypoxia does not cause an increased need for insulin, but rather a decreased utilization of glucose by the cells. Hypoxia can also impair the secretion of insulin by the pancreas.
Choice B reason: This is correct because corticosteroids are known to cause hyperglycemia by stimulating gluconeogenesis, inhibiting glucose uptake, and increasing insulin resistance. The patient may need to adjust his insulin dose or switch to oral antidiabetic agents while on corticosteroid therapy.
Choice C reason: This is incorrect because antibiotics do not cause an increase in glucose levels, unless they are combined with other drugs that affect glucose metabolism, such as sulfonamides or fluoroquinolones.
Choice D reason: This is incorrect because type 2 diabetes does not convert to type 1 diabetes, as they are different types of diabetes with different causes and mechanisms. Type 1 diabetes is caused by autoimmune destruction of the beta cells of the pancreas, resulting in absolute insulin deficiency. Type 2 diabetes is caused by insulin resistance and relative insulin deficiency.
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