[Parenteral nutrition with preconceived bag in a preterm newborn ELBW.].

Introduction: The administration of adequate nutritional intake, from the first days of life, is of fundamental importance in the management of the newborn extremely low birth weight (ELBW): parenteral nutrition (PN), as a support for early enteral feeding, plays a central role in the attempt to guarantee a quantitative and qualitative growth similar to that of the fetus in utero, allowing an adequate caloric, macro and micronutrient intake. The standardized PN, carried out through pre-established bags, allows in the case in which is not possible a personalized preparation, balanced nutritional contributions, reducing the risk of microbiological contamination and errors in preparation.

Clinical Case: We describe the case of an extremely preterm infant with various co-morbid conditions (severe respiratory syndrome, cerebral hemorrhage, anemia, sepsis and patency of the arterial duct) in which PN was used in a pre-established bag, as a support to enteral feeding in the first weeks of life, characterized by extreme clinical instability.