Just as care providers routinely employ several combinations of tape, occlusive dressings and skin preparations to secure and protect intravenous catheters (all thought to be standard-of-care based on their frequency of use), so do the members of the regional service dress PNB catheters with various combinations of catheter anchors, Dermabond, Mastisol, and Tegaderms. The exact combinations are based on physician preference and/or habit, though all dressing schemes generally employ at minimum a standard catheter anchor (provided by the catheter manufacturer) and a Tegaderm, frequently with the addition of either Mastisol or Dermabond or both in combination. The four possible combinations in current use are: