Which feature of drapes helps prevent fluid from crossing from the patient to the sterile field?

• A. Moisture barrier or absorbent backing
• B. Decorative pattern
• C. Colored grid for orientation
• D. Extra-long straps

Answer: (A)

Preventing fluid from crossing from the patient to the sterile field relies on a drape's ability to manage liquids at the interface between patient and sterile area. The moisture barrier or absorbent backing does exactly that: the moisture barrier is a non-porous layer that resists liquid penetration, while the absorbent backing captures and soaks up any fluid that contacts the drape. Together, they create a barrier and a liquid-handling surface that minimize fluid migration toward the sterile field, which is essential for maintaining sterility. The other features don’t address fluid control—decorative patterns don’t affect liquid movement, colored grids aid orientation, and extra-long straps relate to securing the drape, not preventing fluid transfer.