d. instruct nap to notify you immediately if the insertion site appears swollen. 4. what is the best way to prevent infection and conserve resources when terminating an iv piggyback medication infusion in a patient who also has a primary fluid infusion? a. remove the tubing from the primary line y-site port, and cap the end. b. leave both the piggyback tubing and the bag attached to the primary line y-site port until the next scheduled dose. c. place an unopened secondary setup at the bedside, and discard the used one. d. change both the primary and secondary tubing upon terminating the piggyback infusion. 5. which nursing intervention is most important in ensuring safe infusion of a medication delivered by iv piggyback through a saline lock? a. use the most proximal insertion port on the primary tubing. b. hang the piggyback solution higher than the primary infusion solution. c. use a pump to regulate the infusion rate of the piggyback medication.