Into which port of a peripheral IV line should a lipid infusion be piggybacked?

For a lipid infusion being administered via a peripheral IV line, the appropriate choice is to connect it closest to the insertion site. This practice is important because it ensures that the lipid infusion mixes with the blood earliest and is delivered effectively throughout the circulatory system. By placing it nearest to the point where the IV enters the vein, you reduce the risk of the lipid emulsion forming a separate layer in the tubing, which can happen if it travels along a longer length before mixing with the blood.

In addition, administering the infusion closest to the insertion site helps to minimize complications such as phlebitis and allows for more effective monitoring of the site for signs of infiltration or irritation. Ensuring that the lipid does not have to travel far in the IV line also helps to reduce the chance of any occlusions or issues that could arise from factors like viscosity or interactions with other fluids.

By contrast, using ports farther from the insertion site or any available port could lead to inefficient mixing and potential complications, as these might not deliver the infusion into the bloodstream as effectively. Therefore, optimizing the delivery point is crucial for the safety and efficacy of the infusion.