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.
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Related Questions
Correct Answer is D
Explanation
Choice A rationale: Adjusting the dose based on symptoms is not appropriate for phenytoin. It should be taken consistently as prescribed.
Choice B rationale: While taking phenytoin with meals is a general recommendation, it is not the priority teaching point.
Choice C rationale: Informing the patient about the prevention of gingival hyperplasia is important but not the top priority.
Choice D rationale: Teaching the patient to avoid the abrupt cessation of treatment is crucial. Abruptly stopping phenytoin can lead to seizures, and patients should be advised to taper the medication under medical supervision.
Correct Answer is B
Explanation
Choice A rationale: Dry mouth is a known side effect of clonidine, and denying this information would be inaccurate.
Choice B rationale: Providing strategies to alleviate the side effect, such as offering hard candy or gum, is a proactive approach to managing the dry mouth without discontinuing the medication.
Choice C rationale: Stopping antihypertensive medication abruptly can lead to rebound hypertension, and the nurse should not encourage discontinuation without consulting the healthcare provider.
Choice D rationale: Adjusting the dose of clonidine should be done under the guidance of a healthcare provider; self-adjustment without professional input is not advisable.

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