Sterile object remains sterile only when touched by another sterile objectOnly sterile objects may be placed on a sterile fieldA sterile object or field out of the range of vision or an object held below a person's waist is contaminated A sterile object or field becomes contaminated by prolonged exposure to airWhen a sterile surface comes in contact with a wet, contaminated surface, the sterile object or field becomes contaminatedThe edges of a sterile field or container are considered to be contaminated (1 inch border)

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