Isolation:isolating dirty, contaminated areas from clean areas. 2.Barrier:preventing fluid penetration. 3.Sterile field:creating a sterile operative environment by aseptic application of sterile materials. 4.Sterile surface:creating a sterile surface on the skin which acts as a barrier to prevent skin flora from migrating to the incision site. 5.Fluid control:channeling and collecting body and irrigation fluids. 1pc/pouch, 20pcs/pe bag/carton
