Correct Answer: B

Rationale: The correct answer is B: Monitoring vital signs and oxygen saturation. This is the priority intervention because it allows the nurse to assess the patient's current cardiac status and detect any potential complications early. Monitoring vital signs provides crucial information on the patient's cardiovascular stability, while oxygen saturation levels indicate adequate tissue perfusion. Administering pain medication (A) can be important but not the priority. Deep breathing exercises (C) and providing nutritional education (D) are important but not as immediate as monitoring vital signs and oxygen saturation in a patient with a history of myocardial infarction.

Correct Answer: B

Rationale: The correct answer is B: Decrease intake of saturated fats. Saturated fats can raise cholesterol levels, leading to increased risk of heart disease and hypertension. Decreasing intake of saturated fats can help lower blood pressure. Incorrect choices: A: Increasing intake of foods high in sodium can worsen hypertension by increasing blood pressure. C: Increasing intake of processed foods often leads to higher sodium and saturated fat intake, worsening hypertension. D: Decreasing intake of fiber is not ideal as fiber helps in maintaining a healthy weight and managing blood pressure.

Correct Answer: B

Rationale: The correct answer is B: Encouraging early ambulation and use of compression stockings. This intervention is crucial post-hip replacement to prevent complications such as blood clots and muscle weakness. Early ambulation helps prevent blood clots by promoting circulation, and compression stockings further aid in preventing deep vein thrombosis. Pain medication (A) is important but not the priority in preventing complications. Providing nutritional support (C) is also important but does not directly prevent post-operative complications. Monitoring for signs of infection (D) is essential but not as immediate as promoting early ambulation to prevent complications.

Correct Answer: D

Rationale: The correct answer is D because a proficient nurse should have a holistic view of the patient's situation, focusing on long-term goals rather than just completing tasks. This approach ensures comprehensive care and better outcomes. Choice A is incorrect as it implies reliance on rules over experience. Choice B is incorrect because intuition alone may not always lead to the best solution. Choice C is incorrect as it emphasizes daily plans rather than long-term goals.

Correct Answer: D

Rationale: The correct answer is D because the presence of a physical characteristic like a scar is an objective finding that can be directly observed and measured during a physical assessment. This information is not subject to interpretation or bias. In contrast, choices A, B, and C involve subjective information that relies on the patient's report or memory, making them less reliable and objective. History of allergies (A) and use of medications (B) are subjective and based on the patient's self-report, while last menstrual period (C) is also subjective and may not always be accurate. Therefore, choice D is the only objective piece of information among the options provided.