Which of the following is the primary purpose of flushing an IV line before and after giving IV medications?

• A. To sterilize the line.
• B. To remove air bubbles.
• C. To ensure the IV equipment remains sterile and clean.
• D. To maintain IV line patency and ensure proper delivery of medication.

Answer: (D)

Flushing an IV line before and after giving IV medications centers on keeping the line open and ensuring the medication actually reaches the patient. Before giving the drug, a saline flush clears the line of any residual solution or meds and establishes a clean pathway so the new medication isn’t diluted or diverted by leftovers. After administering, another flush pushes the remaining dose through and clears the line so nothing stays inside that could cause dose errors or interactions with future infusions. This practice maintains patency, prevents occlusion from clots or precipitates, and supports accurate, reliable drug delivery.

Sterilization isn’t accomplished by flushing, and while priming the line can help minimize air in the system, the main goal is to keep the line open and ensure proper delivery. Maintaining the line’s cleanliness is important, but the primary purpose of flushing is to maintain patency and ensure the medication is delivered as intended.