The nurse is caring for a patient with a urinary catheter. Which of the following is the most important nursing action for the nurse to take to prevent urinary tract infection in this patient? 1....

The nurse is caring for a patient with a urinary catheter. Which of the following is the most important nursing action for the nurse to take to prevent urinary tract infection in this patient?

1. Force fluids to 4000 mL every 24 hours. 2. Empty the Foley bag every 4 hours around the clock. 3. Maintain a closed catheter system. 4. Wash the perineum every 8 hours