Correct Answer: B

Rationale: The correct answer is B: Limit the duration of catheter use. Limiting the duration of catheterization is a crucial method for preventing catheter-associated urinary tract infections (CAUTIs). Prolonged catheter use increases the risk of introducing pathogens into the urinary tract, leading to infections. Using clean gloves for insertion (choice A) is important for preventing contamination but does not address the main cause of CAUTIs. Using a smaller size catheter (choice C) may help reduce trauma but does not directly prevent infections. Changing the catheter tubing every 24 hours (choice D) is not necessary unless clinically indicated, and it is not the most effective method for preventing CAUTIs.

Correct Answer: B

Rationale: The correct answer is B: Limit the duration of catheter use. Limiting the duration of catheterization is a crucial method for preventing catheter-associated urinary tract infections (CAUTIs). Prolonged catheter use increases the risk of introducing pathogens into the urinary tract, leading to infections. Using clean gloves for insertion (choice A) is important for preventing contamination but does not address the main cause of CAUTIs. Using a smaller size catheter (choice C) may help reduce trauma but does not directly prevent infections. Changing the catheter tubing every 24 hours (choice D) is not necessary unless clinically indicated, and it is not the most effective method for preventing CAUTIs.

Correct Answer: A

Rationale: The correct answer is A because ambulating a client is a non-invasive task that can be safely and effectively performed by a nursing assistant. Choice B is incorrect as complex wound care requires specialized skills usually performed by licensed nurses. Choice C involves administering intravenous antibiotics, which also requires a higher level of training and assessment skills than a nursing assistant possesses. Choice D, involving a client who is NPO and requires IV hydration, may involve further assessments and monitoring that are beyond the scope of a nursing assistant.

Correct Answer: A

Rationale: The correct answer is to check the ventilator tubing for disconnection first when a patient on mechanical ventilation experiences a sudden drop in oxygen saturation. This is crucial because equipment malfunction, such as tubing disconnection, can lead to decreased oxygen delivery, resulting in a drop in oxygen saturation. Checking the tubing ensures that the ventilation system is functioning properly and that the patient is receiving the necessary oxygen. Option B is incorrect because increasing oxygen flow without checking for equipment issues may not address the root cause of the drop in saturation. Option C is not the priority in this situation as the immediate focus should be on assessing and ensuring the functioning of the ventilation equipment. Option D delays addressing the potential equipment malfunction, which could worsen the patient's condition if not promptly resolved.

Correct Answer: B

Rationale: The correct answer is B: Prioritize a chest x-ray for the client. When a client presents with severe dyspnea, a chest x-ray should be prioritized as it helps in assessing the lungs and heart, which are crucial in cases of respiratory distress. Echocardiograms are more focused on assessing heart function and may not provide immediate information needed in cases of dyspnea. CT scans and MRIs are more detailed imaging studies that are not typically the first-line diagnostic tests for severe dyspnea.