Correct Answer: C

Rationale: Step-by-step rationale for why choice C is correct: 1. Going to the patient’s bedside is the priority as it allows the nurse to assess the patient's condition directly. 2. By being at the bedside, the nurse can quickly evaluate the patient's breathing, vital signs, and other indicators for immediate action. 3. Direct assessment enables timely intervention and avoids delays in addressing potential life-threatening situations. 4. Checking for possible causes of the alarm and reconnection to the ventilator can follow, but assessing the patient's immediate needs takes precedence. In summary, choice C is correct because direct patient assessment is the fundamental step in responding to a ventilator alarm to ensure patient safety and timely intervention. Choices A, B, and D are incorrect as they focus on troubleshooting and technical aspects before directly assessing the patient's condition.

Correct Answer: A

Rationale: The correct answer is A because evaluating morning lab results is crucial to monitor the patient's condition before dialysis. Abnormal results may impact the dialysis treatment plan. Option B is incorrect as administering antihypertensive medications is not directly related to dialysis. Option C is incorrect as assessing the dialysis access site is the responsibility of the dialysis team. Option D is incorrect as weighing the patient is not typically done immediately before dialysis.

Correct Answer: A

Rationale: The correct answer is A: 46.8; meets criteria for ARDS. The PaO /FiO ratio is calculated by dividing the arterial oxygen partial pressure (PaO) by the fraction of inspired oxygen (FiO). In this case, PaO is 78 mm Hg and FiO is 0.6 (60%). Therefore, the calculation would be 78/0.6 = 130. This value is less than 300, which is indicative of ARDS according to the Berlin criteria. Choices B and C are incorrect as they do not align with the criteria for ARDS. Choice D is incorrect because the data provided is sufficient to compute the ratio.

Correct Answer: A

Rationale: The correct answer is A because in this situation, the patient is no longer able to make decisions for themselves due to being heavily sedated. The healthcare surrogate or proxy steps in to make decisions on behalf of the patient to ensure their comfort and well-being. Choice B is incorrect because the patient is competent and able to make their own decisions, so there is no need for a surrogate to take over decision-making. Choice C is incorrect because the patient is competent and has the right to make decisions about their own treatment, even if they go against medical recommendations. Choice D is incorrect because the patient is competent and receiving appropriate treatment for their pain and anxiety, so there is no need for a surrogate to intervene in this scenario.

Correct Answer: A

Rationale: The correct answer is A: Alveoli collapse and atelectasis occurs. When fluid is present in the alveoli, it impairs the surface tension necessary for the alveoli to remain open, leading to collapse and atelectasis. This prevents proper gas exchange, resulting in hypoxemia. Choice B is incorrect because impaired gas diffusion typically occurs with conditions affecting the alveolar-capillary membrane, not fluid in the alveoli. Choice C is incorrect as hypoventilation refers to decreased ventilation, not specifically related to fluid in the alveoli. Choice D is incorrect as fluid in the alveoli is not a direct indicator of heart failure.