Correct Answer: D

Rationale: The correct answer is D because it accurately states that withholding "extraordinary" resuscitation is legal and should be based on specified criteria in advance directives and physician orders. This is in line with medical ethics and patient autonomy. A is incorrect because family presence during resuscitation can be beneficial for emotional support and decision-making. B is incorrect as it is still necessary for a physician to document "do not resuscitate" orders even with a healthcare surrogate. C is incorrect as "slow codes" are not ethical and go against the principle of beneficence.

Correct Answer: B

Rationale: The correct answer is B: Administer anticholinergic medications as prescribed. Anticholinergic medications can help dry up secretions and improve breathing in a patient nearing death. This intervention targets the underlying cause of increased secretions. Suctioning (choice A) may provide temporary relief but does not address the root issue. Elevating the head of the bed and repositioning (choice C) can help with comfort but do not directly address the secretions. Restricting oral intake (choice D) may lead to dehydration and discomfort without effectively managing the secretions. Administering anticholinergic medications is the priority as it directly targets the symptom of increased secretions, improving the patient's comfort and quality of life.

Correct Answer: B

Rationale: Rationale: The correct action is to observe the patient's respiratory effort next. This step ensures that the patient's breathing remains stable and adequate. If respiratory effort is compromised, immediate intervention is required. Checking for bilateral pulses (A) is important but comes after ensuring respiratory status. Checking level of consciousness (C) is also crucial but not as immediate as monitoring breathing. Examining for external bleeding (D) is important but not the priority when airway and breathing are already determined to be clear.

Correct Answer: B

Rationale: The correct answer is B because calibrating the system with central venous and arterial blood samples ensures accuracy of the mixed venous oxygen saturation (SvO2) measurement. This calibration allows for comparison of the values obtained from both sources to confirm the accuracy of the measurement. Choice A is incorrect because zero referencing the transducer at the level of the phlebostatic axis does not directly address the accuracy of the SvO2 measurement. Choice C is incorrect because ensuring patency of the catheter using normal saline pressurized at 300 mm Hg does not directly impact the accuracy of the SvO2 measurement. Choice D is incorrect because using noncompliant pressure tubing does not ensure the accuracy of the SvO2 measurement. The length of the tubing and the presence of stopcocks are not directly related to obtaining an accurate SvO2 value.

Correct Answer: C

Rationale: The correct answer is C: Treatment for elevated blood pressure. In the initial stress response, the body releases adrenaline and cortisol, leading to increased heart rate and blood pressure. Treating elevated blood pressure is crucial to prevent complications like heart attack or stroke. Adequate pain control (A) and intravenous sedation (B) may help manage symptoms but do not directly address the physiological response to stress. Ignoring an elevated glucose level (D) is not recommended as stress can impact blood sugar levels. Treatment for elevated blood pressure directly targets the physiological response to stress, making it the best nursing action in this scenario.