Flushing an IV line helps to prevent which of the following?

Flushing an IV line is a critical practice within IV fluid therapy that primarily serves to prevent occlusion. Occlusion refers to a blockage in the IV line that can hinder the flow of fluids and medications. Over time, blood can backtrack into the line, leading to clot formation or the accumulation of precipitates from medications, especially when using certain types of infusions. By flushing the line regularly with a sterile solution, generally saline, healthcare providers can ensure that the line remains patent, which enables uninterrupted delivery of fluids and medications, and facilitates a safe and effective treatment regimen.

While the flush may have secondary benefits related to reducing the risk of infection (by clearing away any potential pathogens) or ensuring general line integrity, its primary purpose is to maintain optimal flow and prevent occlusion. This practice becomes especially important in patients receiving long-term IV therapy, where the risk of occlusion increases with extended use.