Dressing
Although transparent (semipermeable) dressings are popular for CVC insertion sites, studies have not demonstrated a clear benefit for transparent dressings versus ordinary sterile gauze. Both dressing types have similar rates of catheter-related BSI, and, therefore, the choice of dressing is simply a matter of personal preference. However, if blood is oozing from the catheter insertion site, absorbent gauze dressing is preferred. Use of a chlorhexidine-impregnated disc (e.g. Biopatch) around the catheter insertion site has been shown to reduce the rate of catheter-related-BSI. When placing these discs, make sure that the catheter is fed through the hole in the disc and that the chlorhexidine side of the disc faces the skin (white side facing skin, light blue side facing up). In general, gauze dressing should be changed at least every 2 days. Transparent dressings should be changed at least every 7 days. Studies have not shown any benefit from more frequent changes if the dressing is clean and intact. However, a dressing should always be changed if it becomes damp, loosened, or soiled.
