Psychiatry Quiz #8: Delirium

1. A 72-year-old man presents to the emergency department with acute onset confusion, fluctuating levels of consciousness, and visual hallucinations. He was recently hospitalized for pneumonia and discharged on a new antibiotic regimen. His daughter mentions that his symptoms started shortly after returning home. Which of the following is the most likely diagnosis? 

Question 1 of 5

2. A 65-year-old woman with a history of type 2 diabetes and hypertension is admitted to the hospital with confusion, disorientation, and agitation that developed over the course of the day. Her medications include metformin, lisinopril, and a new diuretic started one week ago. Physical examination reveals dehydration. Which of the following is the most appropriate initial management?

Question 2 of 5

3. An 80-year-old man with a history of chronic obstructive pulmonary disease (COPD) is brought to the emergency department by his family for sudden changes in mental status, including impaired attention and hallucinations. His family also notes that he has been using his inhaler more frequently over the past few days. Arterial blood gas analysis shows respiratory alkalosis. Which of the following is the most likely cause of his delirium? 

Question 3 of 5

4. A 55-year-old woman with no significant medical history is admitted to the surgical ward for elective knee replacement surgery. On postoperative day 2, she becomes acutely confused, disoriented, and agitated, especially during the night. Her vital signs and laboratory tests are within normal limits. Which of the following risk factors is most likely contributing to her condition? 

Question 4 of 5

5. A 70-year-old man with advanced dementia is admitted to the hospital with pneumonia. On the third day of admission, he becomes increasingly agitated, with fluctuating levels of alertness and attempts to remove his IV line. The night staff also reports that he has been experiencing visual hallucinations. Which of the following interventions is most appropriate for managing his symptoms? 

Question 5 of 5


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