Which practice is essential to prevent infection with central venous catheters?

• A. Use sterile technique for dressing changes and flushes
• B. Reuse dressings
• C. Use non-sterile gloves
• D. Clean with soap and water only

Answer: (A)

Central venous catheters bypass the body's natural barriers, so every contact with the catheter must be done with aseptic technique to prevent microbes from entering the bloodstream. Using sterile technique during dressing changes and when flushing the line creates a sterile barrier around the catheter site and hubs, reducing the chance of introducing infection. This includes performing hand hygiene, using sterile gloves and supplies, preparing the skin with an appropriate antiseptic, and keeping the catheter area free from non-sterile contact. Reusing dressings breaks the barrier and can harbor bacteria, non-sterile gloves can transfer contaminants, and cleaning with soap and water alone does not provide the necessary sterile barrier for invasive devices. Therefore, sterile technique for dressing changes and flushes is essential.