Correct Answer: B

Rationale: The correct answer is B: Use a low-pitched voice. This is because elderly individuals may have age-related hearing loss, making it difficult for them to hear higher frequencies. Using a low-pitched voice can help ensure that the client can hear and understand the nurse clearly. A: Leaning and shouting at the ear of the client may come across as aggressive and disrespectful. C: Opening the mouth wide while talking is not necessary and may be seen as patronizing. D: Using a medium-pitched voice may still be too difficult for the elderly client to hear clearly due to age-related hearing loss.

Correct Answer: D

Rationale: The correct answer is D: Vitamin D. Vitamin D is essential for the absorption of calcium in the intestines. Without sufficient vitamin D, the body cannot effectively absorb calcium, leading to potential issues with calcium absorption. Vitamin A (choice A) is not directly involved in calcium absorption. Vitamin B (choice B) and Vitamin C (choice C) also do not play a significant role in calcium absorption. Therefore, the lack of Vitamin D is the most likely cause for problems with calcium absorption.

Correct Answer: C

Rationale: Step 1: Reading labels carefully on vials containing flush solutions for locks is crucial to ensure the correct solution is being used. Step 2: Potassium chloride should not be used to flush locks as it can be fatal if administered incorrectly. Step 3: By carefully reading labels, the nurse can verify that the correct solution is being used, thus minimizing the risk of using potassium chloride. Summary: - Choice A is incorrect as using a dilute form of potassium chloride does not address the issue of incorrect administration. - Choice B is incorrect as warming the solution does not prevent the risk associated with using potassium chloride. - Choice D is incorrect as replacing locks does not address the root cause of the issue, which is improper administration.

Correct Answer: B

Rationale: Step-by-step rationale for choice B being correct: 1. Dehydration leads to electrolyte imbalances, which can exacerbate cardiac dysrhythmias. 2. Small frequent intake of fluids like juices, broth, or milk helps in gradual rehydration without overwhelming the cardiovascular system. 3. This approach allows for better absorption of fluids and nutrients, promoting hydration without causing sudden shifts in electrolyte levels. Summary of why other choices are incorrect: A: Just drinking a glass of water every hour may not address electrolyte imbalances or provide adequate hydration for a client with cardiac dysrhythmias. C: NG replacement may not be necessary if the client can tolerate oral intake, and it is more invasive than needed. D: A rapid IV infusion may lead to sudden changes in electrolyte levels, potentially worsening the dysrhythmias.

Correct Answer: A

Rationale: The correct answer is A because in the four-point gait with partial weight bearing, the client should move the right crutch ahead first to provide support and stability, followed by the left foot. This sequence ensures proper weight distribution and balance. Moving both crutches together (B) may compromise stability. Moving the left crutch and right foot together (C) may cause uneven weight distribution. Moving both crutches and weaker leg together (D) may not provide adequate support for the weaker leg.