Does anyone have information on what MSB consists of? I know that there are commercially manufactured -one piece fenistrated drape sheets, but we do not use these. We have a large drape that covers the entire patient and then drape the arm with 5 sterile towels leaving just a small window that we work through. Is there any literature that suggests that this is incorrect. I have visited IHI and CDC, and both seen relatively vague. We want to insure that we are meeting the jcaho standard as well as best practice. Any information would be welcomed and appreciated.