Which practice helps prevent catheter-associated UTIs?

• A. Change bag every hour
• B. Leave catheter in place longer
• C. Use a clean technique
• D. Keep bag below bladder

Answer: (D)

Preventing catheter-associated UTIs hinges on keeping urine moving out of the bladder without opening the drainage system. Keeping the collection bag below the level of the bladder uses gravity to ensure continuous drainage away from the catheter and bladder, which minimizes backflow of urine into the bladder. When urine can reflux back, bacteria present in the drainage system can ascend into the urinary tract, increasing infection risk. A below-bladder bag position helps maintain a closed, uninterrupted drainage path and reduces contamination at the catheter hub and drainage line.

Other practices fail to reduce CAUTI risk as effectively. Changing the bag hourly disrupts the closed system and increases handling, which can introduce bacteria. Leaving the catheter in longer exposes the urinary tract to potential contamination for a longer period. Clean technique alone does not prevent infection as effectively as maintaining a closed drainage system with proper bag positioning and care.