Correct Answer: C

Rationale: When toxicity from magnesium sulfate occurs, the nurse should administer calcium gluconate IV as it is the antidote for magnesium sulfate toxicity. Positioning the client supine may not address the toxicity issue. Administering dextrose 5% is not the appropriate intervention for magnesium sulfate toxicity. Methylergonovine is used to manage postpartum hemorrhage and is not indicated for magnesium sulfate toxicity.

Correct Answer: A

Rationale: The correct answer is A: Pain radiating to the left arm. This is a classic symptom of myocardial infarction and indicates possible heart involvement. Reporting this finding to the provider is crucial for prompt evaluation and intervention. Choices B, C, and D are incorrect. Pain relieved by rest, pain worsened with breathing, and pain relieved by antacids are not typical symptoms of myocardial infarction. These findings do not raise the same level of concern as pain radiating to the left arm and are less indicative of cardiac involvement.

Correct Answer: B

Rationale: The correct action the nurse should include in the plan of care for a client with chronic renal failure is to restrict protein intake to the RDA. This is important because limiting protein helps reduce the buildup of waste products that the kidneys are unable to efficiently excrete. Encouraging increased fluid intake (choice A) may further burden the kidneys, increasing the risk of fluid overload. Increasing dietary potassium (choice C) is not recommended in chronic renal failure as impaired kidneys have difficulty regulating potassium levels. Encouraging foods high in sodium (choice D) is also not appropriate as excessive sodium intake can lead to fluid retention and hypertension, which are detrimental in renal failure.

Correct Answer: D

Rationale: The correct answer is D: 'This medication helps decrease swelling and mucus production.' Montelukast is used for long-term asthma management as it helps reduce inflammation and mucus production in the airways. It is not appropriate for acute asthma attacks. Choice A is incorrect because montelukast is not a rescue medication for acute attacks. Choice B is incorrect because montelukast is not specifically taken before exercise. Choice C is incorrect because montelukast is usually taken regularly, not just for a short duration.

Correct Answer: A

Rationale: Using Naegele's rule, to calculate the expected delivery date, you add one year, subtract three months, and add seven days to the first day of the last menstrual period. If the last menstrual period was in October, adding one year gives October of the following year. Subtracting three months gives July, and adding seven days gives the expected delivery date of July 11th. Therefore, the correct answer is 711. Choice B (1011) is incorrect as it doesn't follow Naegele's rule calculations. Choices C (411) and D (1211) are also incorrect as they do not align with the correct application of Naegele's rule.