Correct Answer: A

Rationale: The correct answer is A: Elevated blood pressure. In a client with chronic kidney disease (CKD) receiving erythropoietin therapy, elevated blood pressure requires immediate intervention. This finding is concerning as it may indicate worsening hypertension, which can lead to further complications. Increased fatigue (choice B) is common in CKD but may not require immediate intervention unless severe. Headache (choice C) can be a symptom to monitor but does not pose an immediate threat like elevated blood pressure. Elevated hemoglobin (choice D) is actually a desired outcome of erythropoietin therapy and does not require immediate intervention.

Correct Answer: B

Rationale: Reorienting the client frequently is the most important nursing intervention in this scenario. It helps reduce confusion and agitation, which are common symptoms of acute delirium in hospitalized elderly clients. Requesting a psychiatric consult (choice A) may be necessary if the reorientation does not improve the client's condition or if there are underlying psychiatric concerns, but reorientation should be attempted first. Administering antipsychotic medications (choice C) should not be the initial intervention as they can have adverse effects in elderly individuals. Obtaining a sitter (choice D) may provide support but does not directly address the client's disorientation and agitation.

Correct Answer: C

Rationale: In this scenario, the most appropriate action for the nurse to take is to request that the mother leave the room. This is important to maintain a calm environment and allow the healthcare team to assess and manage the situation without interference. Option A is not the best choice as it may escalate the situation. Option B, notifying the charge nurse, could be considered after addressing the immediate need to remove the mother from the room. Option D, requesting security to remove her, is not necessary at this point and may further escalate the situation unnecessarily.

Correct Answer: C

Rationale: The correct answer is C: Serum creatinine level of 2.0 mg/dl. In a client with ESRD receiving hemodialysis, serum creatinine should be closely monitored. Elevated creatinine levels indicate impaired kidney function. Monitoring serum calcium levels (Choice A), serum potassium levels (Choice B), and serum sodium levels (Choice D) is also important in clients with ESRD, but the most crucial indicator of kidney function in this case is serum creatinine.

Correct Answer: A

Rationale: The correct answer is A: Nausea and indigestion. Diphenhydramine, an antihistamine, commonly causes gastrointestinal side effects such as nausea and indigestion. These symptoms are often reported by individuals taking this medication. Choices B, C, and D are incorrect because hypersalivation, eyelid and facial twitching, and increased appetite are not typically associated with diphenhydramine use.