Correct Answer: A

Rationale: The correct answer is A, absence of a corneal reflex, because in brain death, all brainstem reflexes, including the corneal reflex, are absent. This indicates complete loss of brain function. Choice B, unequal reactive pupils, is incorrect as it suggests some level of brainstem function. Choice C, withdrawal from painful stimuli, is also incorrect as it is a spinal reflex and can occur even in the absence of brain function. Choice D, core temperature of 100.8° F, is irrelevant to assessing brain death.

Correct Answer: A

Rationale: The correct answer is A: Alveoli collapse and atelectasis occurs. When fluid is present in the alveoli, it impairs the surface tension necessary for the alveoli to remain open, leading to collapse and atelectasis. This prevents proper gas exchange, resulting in hypoxemia. Choice B is incorrect because impaired gas diffusion typically occurs with conditions affecting the alveolar-capillary membrane, not fluid in the alveoli. Choice C is incorrect as hypoventilation refers to decreased ventilation, not specifically related to fluid in the alveoli. Choice D is incorrect as fluid in the alveoli is not a direct indicator of heart failure.

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 because palliative care is not just for the dying but also for those with serious illnesses. A: Correct - basic nursing care is essential in palliative care. B: Correct - common symptoms in palliative care include nausea, agitation, and sleep disturbance. D: Correct - palliative care aims to relieve symptoms and improve quality of life. Choice C is incorrect as it wrongly implies palliative care is only for the dying, which is a misconception.

Correct Answer: C

Rationale: The correct answer is C because obtaining certification in critical care nursing demonstrates the nurse's personal expertise in the specialty. Certification confirms the nurse's advanced knowledge and skills, enhancing professional credibility and potential for career advancement. This choice focuses on the individual nurse's competency and dedication to the specialty. Incorrect choices: A: Salary increase is not the primary benefit of certification, although it may be a potential outcome. B: Certification is often preferred but not always required to work in critical care. D: Employers may encourage certification, but it is not always mandated.