Correct Answer: A

Rationale: Flank pain is a classic symptom of acute pyelonephritis, which is a bacterial infection of the kidney. It occurs due to inflammation and irritation of the renal capsule, leading to pain in the flank region. Pedal edema (swelling in the feet and ankles) is more commonly associated with conditions like heart failure or kidney disease, not typically seen in acute pyelonephritis. Hypotension (low blood pressure) is a systemic symptom that may occur with severe infections but is not a specific hallmark of pyelonephritis. Weight gain is also not a typical symptom of acute pyelonephritis; instead, patients may experience weight loss due to decreased appetite and systemic effects of infection.

Correct Answer: A

Rationale: The correct answer is A. When a healthcare provider witnesses a client signing an informed consent form for surgery, they are affirming that the signature on the form belongs to the client. This is crucial for ensuring patient autonomy and informed decision-making. Choices B, C, and D are incorrect because while it is important for the client to understand the risks of surgery, be aware of postoperative care instructions, and have an opportunity to ask questions, these elements are not specifically affirmed by the healthcare provider witnessing the signature.

Correct Answer: A

Rationale: The correct answer is to Evacuate the client (Choice A). In the event of a fire, the safety of the client is the top priority. The RACE (Rescue, Alarm, Contain, Extinguish) mnemonic is used in fire emergencies. The first step is to Rescue or Evacuate the individual from immediate danger. Attempting to extinguish the fire (Choice B) may endanger both the client and the nurse. Calling the fire department (Choice C) is important but should come after ensuring the client's safety. Closing the door to contain the fire (Choice D) is not appropriate in this scenario because the priority is to remove the client from harm's way.

Correct Answer: B

Rationale: In this situation, the appropriate response is to reflect on the client's feelings and explore their experience. Choice A may unintentionally dismiss the client's concerns by not addressing their emotional needs. Choice C suggests a spa treatment as a solution without addressing the underlying emotional issues. Choice D implies that the client's feelings will resolve with time, which may not be helpful in addressing the client's current emotional state.

Correct Answer: A

Rationale: An elevated white blood cell count (WBC 15,000/mm³) is a common indicator of infection as the body increases WBC production to fight off pathogens. In conditions like infections, inflammation, or stress, the WBC count can rise. The other options, hemoglobin, platelet count, and sodium levels, are not typically specific indicators of infection. Hemoglobin measures the oxygen-carrying capacity of red blood cells, platelet count assesses clotting ability, and sodium levels indicate electrolyte balance.