Critical Care Nursing NCLEX Questions

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 placing the patient with the head of the bed elevated 30 degrees is the best position for obtaining an accurate PAOP reading. Elevating the head of the bed helps to align the phlebostatic axis with the atrium, ensuring an accurate measurement of PAOP. This position reduces the impact of hydrostatic pressure on the reading. Options A and D are incorrect because the supine position and recording during exhalation or just before the increase in pressures during inhalation can lead to inaccurate readings. Option B is incorrect because documenting the average PAOP after three measurements does not address the importance of positioning for accuracy.

Correct Answer: C

Rationale: The correct answer is C: Dobutamine infusion. In this scenario, the patient is experiencing hypovolemic shock due to significant blood loss, resulting in low blood pressure, tachycardia, and low cardiac output. Dobutamine is a positive inotropic agent that increases cardiac contractility and output, helping to improve tissue perfusion. Blood transfusion (A) is a common intervention for hypovolemic shock, but in this case, the patient's hematocrit is low, indicating dilutional anemia rather than acute blood loss, so addressing the cardiac output is more urgent. Furosemide (B) is a diuretic that would exacerbate the hypovolemia and worsen the patient's condition. Dopamine (D) is a vasopressor that primarily increases blood pressure, but in this case, the patient's low cardiac output is the main concern, making dobutamine a more appropriate choice.

Correct Answer: B

Rationale: The correct answer is B because a mechanically ventilated patient with cardiogenic shock being treated with an intra-aortic balloon pump would benefit most from having a Vigileo pulse contour cardiac output monitoring system. This device provides continuous cardiac output monitoring and can help guide hemodynamic management in critically ill patients, especially those with hemodynamic instability like cardiogenic shock. It allows for real-time adjustments of fluid and vasoactive medications to optimize cardiac output and tissue perfusion. Choice A is incorrect because a patient with a history of aortic insufficiency and postoperative myocardial infarction may not require continuous cardiac output monitoring like the patient in choice B. Choice C is incorrect as the patient with atrial fibrillation and paroxysmal supraventricular tachycardia does not necessarily need cardiac output monitoring. Choice D is also incorrect as a mechanically ventilated patient following repair of an acute bowel obstruction may not require continuous cardiac output monitoring unless there are specific complications.

Correct Answer: A

Rationale: The correct answer is A because it addresses the husband's concern directly by assuring him that every measure will be taken to provide the best care for his wife. This response shows empathy and provides reassurance, which is crucial in such a stressful situation. It helps to alleviate the husband's anxiety and fear by emphasizing the hospital's commitment to his wife's well-being. Explanation for why the other choices are incorrect: B: This response does not address the husband's immediate concern about his wife's well-being and may come across as dismissive. C: Offering a place to relax does not address the husband's specific question and does not provide the information he is seeking. D: Discussing health insurance is not appropriate at this moment of crisis and does not address the husband's fears about his wife's condition.