"Sterile drapes" refers to medical or surgical coverings that are completely clean and free from bacteria or germs. They are used during surgeries or procedures to maintain a sterile environment and prevent infection. Full definition
Our surgeons wear protective caps, masks, and gowns and use sterile drapes in order to provide the most sterile surgical environment. (sugarhillanimalhospital.com)
If there was a hole in the bowel, they stapled it off, but they wouldn't try to put everything back together; they leave the soldier asleep on the breathing machine, paralyzed; the abdomen may be still left open, they pull a plastic sterile drape over it. (scientificamerican.com)
For example, Dr. Camann realized that by using both clear and solid sterile drapes, obstetricians could switch the solid drape for the clear one just before delivery and allow mom to see her baby being born. (wellnessmama.com)