Correct Answer: C

Rationale: The correct answer is C: Previous violent behavior. This is considered the best predictor of future violent actions as individuals who have a history of violent behavior are more likely to engage in violent acts again. Option A, experiencing delusions, although it can impact behavior, is not as strong of a predictor as past violent behavior. Option B, male gender, is a demographic factor but not as specific or predictive as a history of violence. Option D, a history of being in prison, may indicate past behavior but is not directly linked to future violent actions as a known history of violence.

Correct Answer: C

Rationale: Irritability in infants can indicate worsening dehydration, which needs to be reported. Weight gain (Choice A) would be a positive finding, indicating adequate fluid intake. Poor appetite (Choice B) is common with diarrhea but not as concerning as irritability. Decreased urination (Choice D) can also be a sign of dehydration, but irritability is more specific to worsening dehydration in this case.

Correct Answer: B

Rationale: The correct answer is B: Provide humidified oxygen. Providing humidified oxygen helps prevent dryness and irritation of the respiratory tract during oxygen therapy. This intervention is crucial in preventing complications such as mucous membrane dryness and potential damage to the airways. Checking the client's oxygen saturation every 2 hours (choice A) is essential for monitoring the client's response to therapy but does not directly prevent complications. Instructing the client to perform deep breathing exercises (choice C) is beneficial for respiratory function but does not directly address preventing complications related to oxygen therapy. Using an oxygen mask for delivery (choice D) is a common method of administering oxygen but does not specifically focus on preventing complications like dryness and irritation.

Correct Answer: A

Rationale: The priority for the nurse when caring for a patient with a chest tube is to ensure tube patency and observe for air leaks. This is essential to prevent complications such as pneumothorax and ensure the patient's lung function. While maintaining sterile technique during dressing changes, monitoring drainage, recording output, and observing for signs of infection and subcutaneous emphysema are also important, ensuring tube patency takes precedence as it directly impacts the patient's respiratory status and overall safety.

Correct Answer: B

Rationale: The correct answer is B: 'Identify any reversible causes of delirium.' When managing a client with delirium, it is crucial to first identify and address any reversible factors contributing to the delirium. Administering sedatives (Choice A) may worsen delirium and is not the primary intervention. Increasing environmental stimulation (Choice C) can exacerbate symptoms. Limiting noise and providing a calm environment (Choice D) are beneficial but not as crucial as identifying reversible causes.