Correct Answer: D

Rationale: The correct answer is D: Administer furosemide 20 mg intravenously. In this scenario, the patient is hypotensive with a low cardiac output, low CVP, and low PAOP, indicating cardiogenic shock. Administering furosemide, a diuretic, can worsen the patient's condition by further decreasing preload. This can lead to a decrease in cardiac output and exacerbate the shock state. The other options are more appropriate: A: Titrate supplemental oxygen to achieve a SpO > 94% - Correct, as improving oxygenation is essential in cardiogenic shock. B: Infuse 500 mL 0.9% normal saline over 1 hour - Correct, as fluid resuscitation may be necessary to improve perfusion. C: Obtain arterial blood gas and serum electrolytes - Correct, as these tests provide valuable information about the patient's oxygenation and electrolyte balance.

Correct Answer: C

Rationale: The correct answer is C: True collaboration. In this scenario, the physician consults with the nurse to understand the situation and collaborates on the best course of action for the patient's care. This demonstrates effective teamwork, communication, and mutual respect between healthcare professionals, which are key components of a healthy work environment. Choice A (Skilled communication) is not the best answer because while communication between the physician and nurse is important, the focus in this scenario is more on collaboration and teamwork. Choice B (Appropriate staffing) is not the best answer as the scenario does not specifically address staffing levels but rather the interaction and collaboration between the physician and nurse. Choice D (Recognizing signs of imminent stroke and paging the physician) is incorrect as it is unrelated to the scenario described, which is about the physician and nurse collaborating on patient care.

Correct Answer: B

Rationale: The correct answer is B: Ensure that a sterile field is maintained during the insertion procedure. This is the priority nursing action because maintaining a sterile field is crucial to prevent infection during the invasive procedure. The nurse must follow strict aseptic technique to reduce the risk of introducing bacteria into the patient's bloodstream. All other choices are incorrect: A: Addressing the patient's anxiety is important but not the priority during the insertion procedure. C: Inflating the balloon is a specific action that should be performed by the physician, not the nurse. D: While monitoring the patient's cardiac rhythm is important, ensuring the sterile field takes precedence to prevent complications.

Correct Answer: D

Rationale: The correct answer is D: Work of breathing. Work of breathing refers to the amount of effort required to maintain a specific level of ventilation. This includes the energy needed for inhalation and exhalation. Compliance (A) refers to the ease with which the lungs expand, resistance (B) is the opposition to airflow in the airways, and tidal volume (C) is the amount of air moved in and out of the lungs during normal breathing. Work of breathing encompasses the overall energy expenditure involved in the breathing process, making it the most appropriate term in this context.

Correct Answer: B

Rationale: The correct answer is B: Fighting the ventilator. This behavior indicates the patient is experiencing discomfort and struggling against the ventilator, suggesting a high likelihood of pain. The CPOT assesses pain through behaviors like grimacing, vocalization, and muscle tension, which are all present when a patient is fighting the ventilator. Absence of vocal sounds (Choice A) does not necessarily indicate pain as some patients may be silent even when in pain. Moving legs in bed (Choice C) could be due to restlessness rather than pain. Relaxed muscles in upper extremities (Choice D) do not reflect pain as the CPOT focuses on behaviors indicating discomfort.