Final answer:
Postoperative delirium is treatable and the client's cognition can return to previous levels.
Step-by-step explanation:
The nurse should explain to the client's family that postoperative delirium of this type is treatable and the client's cognition will likely return to previous levels. Delirium is characterized by disruptive memory loss, confusion about time or place, difficulty with planning and executing tasks, poor judgment, and/or personality changes. The problem can be resolved through appropriate treatment and interventions.