Correct Answer: A

Rationale: The correct intervention for preventing pressure ulcers in a client at risk is to turn the client every 2 hours. This helps relieve pressure on bony prominences, improving circulation and preventing tissue damage. Using a donut-shaped cushion can actually increase pressure on the skin and worsen the risk of pressure ulcers. Elevating the head of the bed to 45 degrees is beneficial for preventing aspiration in some cases but does not directly address pressure ulcer prevention. Massaging reddened areas can further damage the skin and increase the risk of pressure ulcer development by causing friction and shearing forces.

Correct Answer: A

Rationale: The correct answer is A: Serum glucose level. In Cushing's disease, elevated cortisol levels lead to increased gluconeogenesis, insulin resistance, and breakdown of proteins and fats, resulting in elevated blood glucose levels. This is known as hyperglycemia. The other options, including serum calcium level (choice B), lymphocyte count (choice C), and serum potassium level (choice D), are not typically affected by Cushing's disease. Therefore, they are incorrect choices.

Correct Answer: C

Rationale: The correct answer is C: 'Use a mechanical lift to move a client.' Using a mechanical lift is an essential ergonomic principle to prevent injury and ensure safe client handling. Choice A is incorrect because standing with feet together when lifting a client can lead to instability and improper weight distribution. Choice B is incorrect as raising the client's head of bed before pulling the client up does not primarily relate to ergonomic principles. Choice D is incorrect because while using a gait belt is important for assisting clients with mobility, it is not specifically related to ergonomic principles for safe handling.

Correct Answer: B

Rationale: The correct answer is B. Taking a calcium supplement daily is crucial for clients on glucocorticoid therapy to prevent osteoporosis, a common side effect of long-term use. Choice A is unrelated to glucocorticoid therapy. Choice C, limiting potassium intake, is not necessary for clients on glucocorticoids. Choice D, taking medication consistently in the evening, is important but does not specifically address the side effects of glucocorticoid therapy.

Correct Answer: C

Rationale: The correct instruction when taking alendronate is to remain upright for 30 minutes after administration. This helps prevent esophageal irritation, a known side effect of the medication. Option A is incorrect because alendronate should be taken in the morning on an empty stomach. Option B is incorrect as taking alendronate with food decreases its absorption. Option D is incorrect as alendronate should be swallowed whole with a full glass of water and not chewed.