RESUMO
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. CONCLUSIONS: PN is essential for some types of newborns and in particular for the ELBW preterms in which enteral feeding, although undertaken early, does not guarantee the necessary contributions to promote adequate growth. The use of NP in a pre-made bag can be a valid alternative to individualized formulations, where not available.