Correct Answer: B

Rationale: The correct answer is B - 'Identify the underlying causative condition.' When a client is experiencing delirium, it is crucial to determine the root cause of this acute change in mental status. This can involve a thorough assessment to identify any medical conditions, medications, infections, or environmental factors that may be contributing to the delirium. By pinpointing the underlying cause, appropriate interventions can be implemented to address the specific issue. Choices A, C, and D are incorrect because controlling behavioral symptoms with low-dose psychotropics, increasing environmental stimulation, and administering antipsychotic medication do not target the primary need of identifying and addressing the causative condition of delirium.

Correct Answer: A

Rationale: The appropriate action for a healthcare professional when administering a blood transfusion is to verify the patient's identity. This step is essential to ensure that the correct blood product is given to the right patient, preventing any errors or adverse reactions. While monitoring vital signs and staying with the patient during the initial phase of the transfusion are also important steps, the primary action of verifying the patient's identity takes precedence to uphold patient safety and prevent any potential harm.

Correct Answer: A

Rationale: The correct answer is A: Clean the perineal area with soap and water. This step is essential in preventing infection and promoting hygiene. Using antiseptic wipes (choice B) is not a standard practice for perineal care; soap and water are preferred. While patting the area dry after cleaning (choice C) is important, the initial step of cleaning with soap and water is crucial. Using gloves (choice D) is a good practice to prevent the spread of infection, but it is not the initial step in providing perineal care.

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 to investigate the client's recent medication changes. In a client with dementia who frequently becomes agitated, medication changes can often be a significant factor contributing to their behavior. Checking recent medication changes can help identify if any specific medication is causing or exacerbating the agitation. Choice A about fluid and electrolyte balance is less likely to be the priority unless there are specific indications in the medical record. Choice C, investigating recent changes in cognitive functioning, may be important but addressing the agitation first is a more immediate concern. Choice D, investigating the client's psychosocial environment, is also important but may not directly address the immediate cause of the agitation as medication changes could.