NMNC 4335 IV Skills Practice Test

A dressing for a CVAD needs to protect the insertion site while allowing you to see it and keep the skin healthy. A transparent semipermeable dressing does exactly that: it creates a sterile barrier to bacteria and fluids, but it’s permeable to water vapor and oxygen, so the skin won’t macerate and you can visually inspect the site for signs of infection, looseness, or drainage. The other options don’t fit as well. An occlusive non-permeable dressing traps moisture and gases, which can irritate the skin and harbor bacteria. Cotton gauze isn’t transparent and can shed fibers or fail to provide a reliable seal. An adhesive bandage alone isn’t enough to cover and secure a CVAD and doesn’t offer an adequate sterile barrier.