What happens if a nonsterile item crosses the sterile field?

• A. The field remains sterile if touched lightly
• B. The field is no longer sterile
• C. The field becomes sterile automatically
• D. The field requires re-sterilization only if contaminated

Answer: (B)

Crossing a sterile field with a nonsterile item contaminates it. Sterility is lost the moment a nonsterile object contacts the field, because microorganisms on that item can transfer to the sterile area. Once contamination occurs, the field cannot be considered sterile again simply through brief contact or light touch; you must stop, discard the contaminated setup, and re-establish a new sterile field with proper sterile technique to ensure patient safety.