Correct Answer: B

Rationale: The correct answer is B: Atrial fibrillation. Patients with a history of stroke are at an increased risk of atrial fibrillation, a common cause of ischemic stroke. Monitoring for signs of atrial fibrillation such as irregular heartbeat, palpitations, dizziness, and chest discomfort is crucial for early detection and prevention of recurrent strokes. Pulmonary embolism (A), chronic kidney disease (C), and sepsis (D) are not directly associated with a history of stroke and would not be the primary focus of monitoring in this case.

Correct Answer: A

Rationale: The correct answer is A: Encouraging early ambulation. Early ambulation helps prevent complications such as deep vein thrombosis and pulmonary embolism by improving circulation and preventing blood clots. It also promotes joint mobility and muscle strength. Providing pain medication (B) is important but not as crucial as preventing complications. Monitoring for signs of infection (C) is essential but not the most important intervention. Administering antibiotics before surgery (D) does not directly prevent post-operative complications related to knee replacement.

Correct Answer: A

Rationale: The correct answer is A because increased sputum production and shortness of breath are classic signs of exacerbation in COPD. This indicates worsening airflow limitation and potential respiratory distress. Monitoring these signs helps in early intervention and preventing further complications. B: Improved oxygen saturation is not a sign of exacerbation in COPD. It would actually suggest improvement in the patient's condition. C: Increased energy levels are not typical signs of exacerbation in COPD. Patients usually experience fatigue and weakness during exacerbations. D: Decreased respiratory rate is not indicative of exacerbation in COPD. It could be a sign of respiratory depression or sedation, but not exacerbation.

Correct Answer: A

Rationale: The correct answer is A because applying theory in real situations allows nurses to analyze, evaluate, and problem-solve effectively. This promotes critical thinking by integrating knowledge into practice. Working with physicians (B) and following orders (C) do not directly enhance critical thinking as they focus more on collaboration and task completion. Developing nursing diagnoses (D) is important but does not specifically target critical thinking skills like applying theory does.

Correct Answer: A

Rationale: The correct answer is A: Administering diuretics as prescribed. Diuretics help reduce fluid retention in patients with heart failure, relieving symptoms like edema and shortness of breath. Prioritizing diuretics can help manage the patient's fluid balance and improve heart function. Encouraging increased fluid intake (B) is contraindicated as it can worsen fluid overload. Restricting sodium intake (C) is important in heart failure management but not the top priority over administering diuretics. Administering pain medications (D) is not a priority intervention for chronic heart failure management.