Correct Answer: C

Rationale: A Venturi mask should be used to deliver a precise oxygen concentration to a client with pneumonia. Venturi masks are designed to deliver a specific oxygen concentration by mixing oxygen with room air in a precise ratio. This device is ideal for patients who require accurate oxygen delivery, such as those with chronic lung diseases. Nasal cannulas deliver a lower concentration of oxygen and are more suitable for patients with mild respiratory issues. Simple face masks and non-rebreather masks do not provide as precise control over the oxygen concentration as a Venturi mask.

Correct Answer: B

Rationale: The correct action for the nurse to take in this situation is to notify the surgeon that the client wishes to withdraw informed consent for the procedure. This ensures that the client's right to refuse treatment is respected. Choice A is incorrect because involving family members in this decision could violate the client's autonomy. Choice C is incorrect as it does not address the immediate need to respect the client's decision. Choice D is also incorrect as the client has clearly stated their refusal of the procedure.

Correct Answer: A

Rationale: The correct answer is A: Increased shortness of breath. In COPD, worsening symptoms often include increased shortness of breath due to impaired lung function. This indicates a decline in respiratory status and the need for prompt intervention. Choice B, decreased wheezing, is not indicative of worsening COPD as it could suggest better airflow. Choice C, productive cough with green sputum, may indicate an infection but not necessarily worsening COPD. Choice D, a slight increase in fatigue, is non-specific and may not directly correlate with the worsening of COPD.

Correct Answer: D

Rationale: In the preoperative phase, determining what the client knows about the surgery is the priority. This action helps address misconceptions, provide necessary information, and ensure the client's understanding and cooperation. Choices A, B, and C are important aspects of preoperative care but assessing the client's knowledge about the surgery takes precedence to alleviate fears, enhance communication, and optimize outcomes.

Correct Answer: D

Rationale: When a patient receiving chemotherapy develops neutropenia, the priority is to reduce the risk of infection. Using reverse isolation precautions is crucial in this situation to protect the patient from exposure to pathogens. Monitoring temperature daily (Choice A) is important but is not as effective as isolating the patient. Limiting visitors (Choice B) can help reduce the risk of exposure, but reverse isolation is a more stringent measure. Administering antibiotics prophylactically (Choice C) is not recommended unless there is a specific indication, as it can contribute to antibiotic resistance.