A confused patient is restless and continues to try to remove the oxygen cannula and urinary catheter. What is the priority nursing diagnosis and intervention to implement for this patient?

Disturbed body image: Encourage patient to express concerns about body

Risk for Injury: Check on patient every 15 minutes

Risk for suffocation: Place "Oxygen in Use" sign on door

Deficient knowledge: Explain the purpose of oxygen therapy and the urinary catheter