When adding sterile liquids, which condition indicates contamination of the sterile field?

• A. The sterile field becomes contaminated if it becomes wet during the procedure
• B. The sterile field remains sterile regardless of moisture
• C. The sterile field is contaminated if moisture is present
• D. The sterile field should be discarded after every use

Answer: (A)

Keeping the sterile field dry is essential because moisture can carry microorganisms into the sterile area, compromising safety. When sterile liquids are added, any wetness on the field shows that the barrier has been breached and contamination has occurred. In practice, a wet field is treated as contaminated and you would stop, reestablish a sterile field, and proceed with sterile technique. Moisture signals contamination because water can transfer microbes from non-sterile surfaces into the sterile area, even with careful handling. The idea that the field could stay sterile regardless of moisture is incorrect, and while moisture presence is a contamination cue, the immediate and decisive sign is the field becoming wet during the procedure. Discarding after every use isn’t the standard rule for every moment; you discard or reestablish only when contamination is evident.