“Full-strength chlorhexidine will sterilize the skin.”
“The edges of a sterile field are considered unsterile.”
“If a sterile object touches an unsterile object, the sterile object is considered contaminated.”
“Sterile objects that are out of view or below waist level are considered unsterile.”
“Airborne microorganisms can contaminate sterile objects and make them unsterile.”
Number 1 is correct.
Rationale: The skin cannot be sterilized, according to the principles of surgical asepsis. The edges of a sterile field are considered unsterile. If a sterile object touches an unsterile object, the sterile object is considered contaminated. Sterile objects that are out of view or below waist level are considered unsterile. Sterile objects can become contaminated by airborne microorganisms.
