Correct Answer: D

Rationale: The correct answer is D because monitoring the surgical incision for signs of infection is essential post-VAD implantation to prevent complications. This step is crucial in early identification and treatment of any potential infection, which can lead to serious outcomes. A) Giving immunosuppressive medications is not typically required for VAD implantation, as the primary goal is to support cardiac function rather than prevent rejection. B) Preparing the patient for a permanent VAD is premature, as the goal is often to bridge to transplantation or recovery, not permanent VAD placement. C) Teaching the patient the reason for complete bed rest is not necessary for VAD implantation, as patients are typically encouraged to gradually increase activity levels under guidance.

Correct Answer: A

Rationale: Step-by-step rationale: 1. Bladder catheterization helps relieve urinary obstruction, a common postrenal cause of acute kidney injury. 2. By draining urine from the bladder, it prevents further damage to the kidneys. 3. This intervention addresses the underlying cause of the kidney injury, leading to improvement. Summary: - Choice A is correct as it directly addresses the postrenal cause by relieving urinary obstruction. - Choices B, C, and D are incorrect as they do not target the specific postrenal cause of acute kidney injury.

Correct Answer: A

Rationale: The correct answer is A: Burden versus benefit. In ethical decision-making, considering the burden of treatment on the patient versus the potential benefits is crucial. This involves weighing the risks, benefits, and potential harm of treatment options. Family's wishes (B) and patient's wishes (C) are important factors but may not always align with what is ethically best for the patient. Potential outcomes of treatment options (D) are relevant but do not directly address the ethical dilemma of balancing burden and benefit. Therefore, A is the correct choice as it directly relates to the ethical principles guiding decision-making in this scenario.

Correct Answer: A

Rationale: The correct answer is A: The endotracheal tube is in the right mainstem bronchus. When the endotracheal tube is not secured properly and is retaped, there is a possibility that it may have migrated into the right mainstem bronchus, leading to absent breath sounds in the left lung fields. This condition is known as endobronchial intubation. In such cases, ventilation primarily occurs in the right lung, resulting in decreased or absent breath sounds on the contralateral side. Choices B, C, and D are incorrect as they do not explain the absence of breath sounds over the left lung fields in this specific scenario.

Correct Answer: C

Rationale: The correct answer is C because a pulmonary artery occlusion pressure of 25 mm Hg indicates possible fluid overload or cardiac issue requiring urgent evaluation. This value is high, suggesting increased pressure in the left side of the heart. Additionally, the oxygen saturation of 89% on 3 L of oxygen indicates potential respiratory compromise. This patient needs immediate assessment and intervention to prevent worsening of their condition. Choice A is incorrect as a central venous pressure of 6 mm Hg is within normal limits, and the urine output is adequate. Choice B is incorrect as a BP of 110/60 mm Hg is acceptable, and a slightly dampened arterial waveform is not an immediate concern. Choice D is incorrect as a pulmonary artery pressure of 25/10 mm Hg is within normal range, and an oxygen saturation of 94% on 2 L of oxygen is acceptable.