Which action best reduces infection risk for a dual-lumen catheter site?

• A. Perform sterile dressing changes at the catheter site.
• B. Clean weekly with aseptic technique.
• C. Use hot water to clean site daily.
• D. Remove catheter if any redness occurs.

Answer: (A)

Maintaining a sterile dressing at the catheter site is the most effective way to lower infection risk because it preserves a clean barrier between the catheter tract and the external environment, preventing microbes from entering along the catheter. When dressing changes are done with sterile technique, you keep the area free from contaminants, use clean gloves and sterile supplies, and often prep the skin with an appropriate antiseptic before applying a new dressing. Keeping the dressing dry, intact, and properly secured further reduces moisture and skin flora that could migrate to the catheter. Regular inspection and prompt replacement of damp or soiled dressings help maintain this protective barrier.

Other options fall short because they don’t maintain a continuous sterile barrier. Cleaning only weekly doesn’t provide ongoing protection, and using hot water isn’t an appropriate antiseptic and can irritate or damage skin. Removing the catheter at the first sign of redness isn’t a preventive measure and is not standard practice without further assessment and clinical indication.