[Gastrointestinal hormones during minimal enteral feeding of sick premature infants].

Objective: To measure gastrointestinal hormonal response (GHR) with minimal enteral feeding (MEF) in sick premature infants.

Methods: Forty-one babies birth weight < 1800 g receiving total parenteral nutrition or intravenous solutions entered the study. They were distributed in two groups: group I: 26 infants (early enteral feeding < or = 5 d) and group II = 15 infants (late enteral feeding = 10-14 d).

Usefulness of fractional excretion of sodium in critically ill pre-term newborns.

The purpose of this prospective study was to measure the fractional excretion of sodium (FENa) in critically ill pre-term newborns (PTNB) in order to determine its cut point in the diagnosis of acute renal failure (ARF). This study included 52 newborns and was conducted from May, 1994 to May, 1995. Patients were divided in two groups: patients without ARF in group A (n = 47) and patients with ARF in group B (n = 5).