1. 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.
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