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.

Correct Answer: A

Rationale: The correct answer is A because in this situation, the patient is no longer able to make decisions for themselves due to being heavily sedated. The healthcare surrogate or proxy steps in to make decisions on behalf of the patient to ensure their comfort and well-being. Choice B is incorrect because the patient is competent and able to make their own decisions, so there is no need for a surrogate to take over decision-making. Choice C is incorrect because the patient is competent and has the right to make decisions about their own treatment, even if they go against medical recommendations. Choice D is incorrect because the patient is competent and receiving appropriate treatment for their pain and anxiety, so there is no need for a surrogate to intervene in this scenario.

Correct Answer: C

Rationale: The correct answer is C because the synergy model of practice emphasizes considering the needs of patients and their families, which in turn drives nursing competency. This approach recognizes that patient care is not just about the individual but also about the broader support system. This holistic viewpoint helps nurses tailor their care to meet the unique needs of each patient and their family, ultimately leading to better outcomes. Choices A, B, and D are incorrect: A: Allowing unrestricted visiting for the patient 24 hours is not directly related to the focus of the synergy model which is more about patient-centered care. B: Providing holistic and alternative therapies is a valid approach, but it is not the primary focus of the synergy model. D: Addressing the patients' needs for energy and support is important but does not capture the comprehensive nature of the synergy model which encompasses the needs of both patients and their families.

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: C

Rationale: The correct answer is C: Tachycardia. Hypoxemia results in decreased oxygen levels in the blood, stimulating the body to increase heart rate to improve oxygen delivery. Tachycardia is an early sign of the cardiovascular system compensating for hypoxemia. Heart block (A) is a disruption in the electrical conduction within the heart and is not directly related to hypoxemia. Restlessness (B) is a non-specific sign and can be caused by various factors. Tachypnea (D) is an increased respiratory rate, which is a response to hypoxemia but not a direct effect on the cardiovascular system.