Where is Peripheral PN administered, resulting in limited nutritional value?

Peripheral parenteral nutrition (PN) is administered through a peripheral vein, typically in the arm or hand. The use of peripheral veins for nutrient delivery is suitable for patients who require short-term nutritional support and do not have severe nutritional deficits. However, the nutritional value provided by peripheral PN is limited due to the concentration of nutrients that can be safely infused through these veins.

Peripheral veins can only accommodate lower concentrations of dextrose and other macronutrients compared to central veins, which are larger and can handle more substantial fluid volumes and higher concentrations of nutrients. This restriction is critical since infusing highly concentrated solutions into peripheral veins can lead to complications such as phlebitis or infiltration. Consequently, while this route is beneficial for certain patients, it cannot meet the full nutritional needs required for those with more significant deficiencies.