Correct Answer: B

Rationale: The correct answer is B because positioning the zero-reference stopcock line level with the hemostatic axis ensures accurate arterial pressure monitoring. Placing the stopcock at the hemostatic axis allows for correct measurement of blood pressure without any errors due to height differences. This positioning helps in obtaining precise and reliable readings. A: Balancing and calibrating the monitoring equipment every 2 hours is important for equipment maintenance but does not directly impact the accuracy of arterial pressure monitoring. C: Ensuring the patient is supine with the head of the bed flat is a standard position for arterial pressure monitoring but does not specifically address the correct positioning of the stopcock. D: Rechecking the location of the hemostatic axis when changing the patient's position is essential for maintaining accuracy, but it does not directly relate to the initial correct positioning of the stopcock.

Correct Answer: C

Rationale: The correct answer is C: Anxiety about unfinished business. The patient's desire to settle issues with their siblings before death indicates a concern about unresolved matters. This response aligns with the concept of psychosocial responses to death, specifically the need for closure and resolution. Restlessness (choice A) may not necessarily indicate a specific focus on unfinished business. Yearning and protest (choice B) typically refer to the initial stages of grief, not specifically related to settling unresolved issues. Fear of the meaninglessness of one's life (choice D) is more existential and philosophical, whereas the patient's focus here is on addressing specific issues with their siblings.

Correct Answer: A

Rationale: The correct answer is A because comparing measured pressures with other physiological parameters ensures accuracy and consistency. This step helps in interpreting the RA P/CVP reading correctly. Choice B is incorrect as flushing the catheter with saline is not necessary for obtaining the pressure reading. Choice C is incorrect as inflating the balloon with air is not part of the correct procedure. Choice D is incorrect because obtaining the measurement during exhalation can affect the accuracy of the reading.

Correct Answer: C

Rationale: The correct answer is C because it empowers the family to take action by requesting a physician evaluation of the patient's pain control. This step is crucial in ensuring that the patient's pain is adequately managed. By involving the physician, the family can advocate for the patient's needs and potentially explore alternative pain management strategies. Choice A is incorrect because it dismisses the family's concerns and fails to address the need for further evaluation. Choice B may provide temporary relief but does not address the underlying issue of inadequate pain control. Choice D is incorrect as it suggests delaying action, which could lead to prolonged suffering for the patient.

Correct Answer: C

Rationale: The correct answer is C: intrarenal disease, probably acute tubular necrosis. The patient's symptoms of general malaise, fatigue, decreased urinary output, along with the presence of coarse, muddy brown granular casts and hematuria in the urinalysis indicate kidney damage. Acute tubular necrosis is a common cause of acute kidney injury characterized by damage to the renal tubules, leading to impaired kidney function. The presence of granular casts and hematuria suggests tubular injury and bleeding within the kidney. Choices A and B are incorrect as they refer to prerenal and postrenal causes of kidney injury, respectively, which do not align with the patient's symptoms and urinalysis findings. Choice D is incorrect as a urinary tract infection would typically present with different symptoms and urinalysis findings.