Nurse Smith uses a clean, sterile syringe to draw up IV fluid from a 1,000cc bag and injects the fluid into the IV tubing for Patient A. She then uses the same syringe to draw up more fluid from the same bag and inject it into the IV tubing for Patient B. She repeats the same process for 2 more patients in the pre-op bays. Because the syringe is being used to inject fluid into tubing that's located several inches from each patient's injection site, Ms. Smith believes there's no contamination risk. As an added bonus, she reasons, she's saving her surgical facility some money by not opening additional syringes.