An older adult patient in the intensive care unit recovering from an abdominal aortic aneurysm repair begins to show signs of delirium.The nurse realizes that which situation is the most likely cause of this change in mentation?
A) The patient's intravenous line is infiltrated.
B) The patient has been NPO (nothing by mouth) for an extended period of time.
C) The patient's oxygen saturation has dropped from 96% to 90%.
D) The patient was started on a patient-controlled analgesia (PCA) pump with morphine.
Correct Answer:
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