Correct Answer: B

Rationale: Administering oxygen at 2 liters per minute via nasal cannula is the immediate action for a patient experiencing shortness of breath. This intervention helps to improve oxygenation and relieve respiratory distress promptly. Placing the patient in a high Fowler's position (choice A) may also be beneficial but providing oxygen takes precedence in this scenario to address the underlying hypoxemia. Encouraging deep breaths and coughing (choice C) may not be appropriate as the first action, especially without assessing the patient first. Assessing lung sounds (choice D) is essential but should follow the initial intervention of administering oxygen.

Correct Answer: B

Rationale: The most important information to provide to a patient with heart failure regarding fluid restrictions is to provide them with a fluid restriction plan. This plan helps the patient manage their fluid intake effectively, which is crucial in preventing complications associated with heart failure. Monitoring weight daily can be a part of the plan but is not the most important. Instructing the patient to avoid salty foods is beneficial but not as crucial as having a structured fluid restriction plan. Encouraging the patient to increase fluid intake would be counterproductive and potentially harmful in a patient with heart failure.

Correct Answer: B

Rationale: The most appropriate method for assessing a patient's pain level is to use a standardized pain scale, such as a 0-10 scale. This method provides an objective and consistent way to measure and communicate the intensity of pain experienced by the patient. Choice A, observing facial expressions, can be subjective and may not always accurately reflect the level of pain. Choice C, asking the patient to rate their pain based on their mood, may be influenced by various factors unrelated to pain. Choice D, involving the patient's family members in assessing the pain, is not ideal as pain is a subjective experience that should be reported by the patient themselves.

Correct Answer: C

Rationale: The correct first action for the nurse to take when a patient has difficulty ambulating after surgery is to call for assistance with ambulation. This is essential to ensure the safety of the patient and prevent any potential falls or injuries. Encouraging deep breathing exercises (Choice A) may be beneficial but should not be the first priority when the patient is having difficulty walking. Assisting the patient in ambulating a short distance (Choice B) may put both the patient and the nurse at risk if the patient is struggling. Assessing the patient's pain level before ambulation (Choice D) is important but should come after ensuring that the patient can safely ambulate with assistance.

Correct Answer: B

Rationale: The correct answer is B. The nurse must follow the legal DNR order, even if the family insists on resuscitation. Respecting the patient's wishes is crucial in providing ethical care. Choice A is incorrect because the nurse should prioritize the patient's documented wishes over the family's requests. Choice C may cause unnecessary delays in care as the DNR order is a legal document. Choice D is not the initial action to take in this situation; the nurse should first address the conflict between the family's wishes and the patient's DNR order.