Correct Answer: A

Rationale: The correct answer is A: high Fowler's position. This position promotes optimal lung expansion by allowing the chest to expand fully, improving oxygenation. It also helps reduce the work of breathing. Side lying with the head of the bed elevated (B) may not provide the same level of lung expansion. Sitting in a chair (C) may not be suitable for a patient in acute respiratory failure as it may not provide adequate support for breathing. Supine with the bed flat (D) can worsen respiratory distress by limiting lung expansion.

Correct Answer: C

Rationale: The correct answer is C: Collaboration with patients, families, and team members. By addressing the family's concern about lack of communication with the physician and arranging a meeting between the intensivist and the family, the nurse is demonstrating collaboration skills in facilitating communication and ensuring the family's questions are addressed. This competency emphasizes the importance of working together with patients, families, and the healthcare team to provide optimal care. Incorrect choices: A: Advocacy and moral agency in solving ethical issues - While advocacy is important in nursing, in this scenario, the focus is on communication and collaboration rather than ethical issues. B: Clinical judgment and clinical reasoning skills - Although these skills are crucial in critical care nursing, the situation described does not primarily involve clinical judgment but rather communication and collaboration. D: Facilitation of learning for patients, families, and team members - While patient education is important, the main focus of the scenario is on addressing the family's concerns and facilitating communication, rather than educational aspects.

Correct Answer: D

Rationale: The correct answer is D because positioning the patient with the head of the bed at 10 degrees is incorrect for a patient receiving mechanical ventilation. The optimal position for such patients is to elevate the head of the bed to 30-45 degrees to prevent aspiration and improve oxygenation. Option A is incorrect as increasing FIO2 before suctioning is appropriate to ensure adequate oxygenation. Option B is incorrect as securing a bite block in place using adhesive tape is a standard practice to prevent the patient from biting on the endotracheal tube. Option C is incorrect as asking for assistance to reposition the endotracheal tube shows the RN is aware of the importance of proper placement to ensure effective ventilation.

Correct Answer: A

Rationale: Step 1: Symptoms of weight loss, racing heart rate, and difficulty sleeping are common in hyperthyroidism. Step 2: Presence of moist skin, fine hair, prominent eyes, lid retraction, and staring expression are classic signs of Grave's disease, a type of hyperthyroidism. Step 3: Grave's disease is an autoimmune disorder where the thyroid gland is overactive, leading to excessive production of thyroid hormones. Step 4: Excess thyroid hormones increase metabolic rate, causing weight loss, racing heart rate, and insomnia. Step 5: Therefore, the findings described in the question are consistent with Grave's disease.

Correct Answer: B

Rationale: The correct answer is B: Hypoventilation. A PaCO2 of 48 mm Hg indicates an elevated level of carbon dioxide in the blood, which is typically seen in hypoventilation where the lungs are not effectively removing CO2. Hypoventilation leads to respiratory acidosis. Option A is incorrect because hyperventilation would decrease PaCO2 levels. Option C is incorrect as it does not directly relate to PaCO2 levels. Option D is incorrect as increased excretion of HCO3- would not directly affect PaCO2 levels.