Correct Answer: A

Rationale: In a client with dementia, addressing restlessness and agitation is a priority because these symptoms can exacerbate dementia and lead to further complications. Restlessness and agitation can indicate underlying issues such as pain, discomfort, or unmet needs, which should be promptly assessed and managed to improve the client's quality of life. Decreased respiratory rate, wandering during the night, and incontinence are important to address but do not pose immediate risks to the client's well-being compared to the potential effects of unmanaged restlessness and agitation in dementia.

Correct Answer: C

Rationale: Performing a wound culture before applying ointment is crucial when providing wound care to a client with a pressure ulcer. This action helps identify any underlying infections, allowing healthcare providers to select the most appropriate treatment. Options A, B, and D are not as critical as performing a wound culture, as they focus on wound dressing and cleansing rather than identifying potential infections.

Correct Answer: A

Rationale: The correct answer is A: Serum glucose level. In Cushing's disease, there is an excess production of cortisol, leading to hyperglycemia. This results in an increase in serum glucose levels. Choices B, C, and D are incorrect because Cushing's disease does not directly affect serum calcium levels, lymphocyte count, or serum potassium levels.

Correct Answer: B

Rationale: The correct answer is B because taking warfarin later on the same day if a dose is missed helps maintain therapeutic levels. Choice A is incorrect because warfarin should be taken with food to enhance absorption. Choice C is incorrect as skipping a dose can lead to fluctuations in warfarin levels. Choice D is incorrect as taking an additional dose can increase the risk of bleeding.

Correct Answer: B

Rationale: The correct answer is B: Place the client in a 30-degree lateral position. Positioning the client laterally reduces pressure on bony prominences, improving circulation and helping prevent pressure injuries. Placing the client in a prone position (choice A) increases pressure on the bony prominences, raising the risk of pressure injuries. Similarly, placing the client in a high Fowler's position (choice D) can also increase pressure on certain areas. While encouraging the client to reposition every 4 hours (choice C) is important, the specific lateral positioning is more beneficial in preventing pressure injuries.