Correct Answer: B

Rationale: The correct answer is B: Assist with the intubation of the patient. In this scenario, the patient is unconscious and has ingested a potentially harmful substance. Intubation is the first priority to maintain the patient's airway and ensure adequate oxygenation. This step is crucial in preventing aspiration of gastric contents and securing the patient's respiratory status. Inserting a large-bore orogastric tube (choice A) is not the priority as airway management takes precedence. Preparing a syringe with saline (choice C) is unnecessary at this stage. Giving the first dose of activated charcoal (choice D) should only be done after securing the airway to prevent aspiration.

Correct Answer: C

Rationale: The correct answer is C, the 86-year-old postoperative from colonic resection. This patient is at the greatest risk for delirium due to being elderly, having undergone surgery, and having a history of being from a nursing home. These factors contribute to an increased susceptibility to delirium. A: The 36-year-old with alcohol withdrawal may be at risk for delirium tremens, but the older age of the patient in choice C places them at higher risk. B: The 54-year-old with an elevated creatinine level postoperative is at risk for complications, but age and history of nursing home placement increase the risk for delirium in choice C. D: The 95-year-old with community-acquired pneumonia is at risk for delirium, but the combination of age, surgery, and nursing home history in choice C presents a greater risk.

Correct Answer: B

Rationale: The correct answer is B because assessing the hemofilter every 6 hours for clotting is essential in ensuring the effectiveness of CRRT. Clotting can obstruct blood flow, leading to treatment inefficiency and potential harm to the patient. This step helps the nurse to promptly address any clotting issues and prevent complications. A: Assessing that the blood tubing is warm to the touch is not a standard practice for monitoring CRRT and does not provide relevant information about the treatment's effectiveness. C: Covering the dialysis lines to protect them from light is not a priority in monitoring CRRT. Light exposure is not a common concern in this context. D: Using clean technique during vascular access dressing changes is important for infection prevention but is not directly related to monitoring the effectiveness of CRRT.

Correct Answer: D

Rationale: The Venturi mask is the best choice for delivering 65% oxygen because it allows precise oxygen concentration delivery through adjustable venturi valves. This device ensures consistent oxygen levels even during variations in patient breathing patterns. Face mask with non-rebreathing reservoir (A) delivers higher oxygen concentrations, low-flow nasal cannula (B) is not suitable for precise oxygen delivery, and simple face mask (C) may not provide the desired oxygen concentration.

Correct Answer: C

Rationale: The correct answer is C because individualized visitation meets the unique needs of patients and family members, promoting holistic care and emotional support. Choice A is incorrect as strictly restricted visiting hours may hinder family involvement in care. Choice B is incorrect as children can provide comfort and support. Choice D is incorrect as unrestricted visiting may disrupt patient rest and care routines.