Epinephrine is used to treat cardiac arrest and status asthmaticus because of which of the following actions?
Increased speed of conduction and gluconeogenesis
Bronchodilation and increased heart rate, contractility, and conduction
Increased vasodilation and enhanced myocardial contractility
Bronchoconstriction and increased heart rate
The Correct Answer is B
Choice A rationale: Epinephrine does increase the speed of conduction, but it does not significantly contribute to gluconeogenesis.
Choice B rationale: Epinephrine is used in cardiac arrest to increase heart rate, contractility, and conduction. In asthma, it causes bronchodilation.
Choice C rationale: While epinephrine can cause some vasodilation, it is not a primary indication for its use in cardiac arrest or status asthmaticus.
Choice D rationale: Epinephrine causes bronchodilation, not bronchoconstriction.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
Choice A rationale: 1500 mg is below the recommended maximum dose of acetaminophen.
Choice B rationale: 2000 mg is below the recommended maximum dose of acetaminophen.
Choice C rationale: The maximum recommended dose of acetaminophen in a 24-hour period is 4000 mg.
Choice D rationale: 5000 mg exceeds the recommended maximum dose of acetaminophen and can lead to liver damage.
Correct Answer is C
Explanation
Choice A rationale: Testing for CYP450 genetic variants is more relevant for medications metabolized by the cytochrome P450 system.
Choice B rationale: HLA-B genetic variants are more associated with certain drug hypersensitivity reactions, not specifically for etanercept.
Choice C rationale: Etanercept can increase the risk of reactivating latent infections, including hepatitis B. Screening for latent hepatitis B virus is essential before starting therapy.
Choice D rationale: Blood type and crossmatch are not typically required for starting etanercept therapy.
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