Comportamiento y evolución de recién nacidos pretérmino tardío entre 1800 y 1900 gramos.

Introduction. Childbirths with low birth weight and preterm are a public health problem. In our country, the prevalence of this type of birth has been increasing. In our institution, recently we adopted a policy of keeping under surveillance all late preterm infants weighing less than 1900 g for at least 48 to 72 hours. Therefore, the objective of this study was to describe the evolution of this population after the institutional implementation of this measure. Methods. A retrospective study was conducted at the Hospital General de Occidente during the period from October 2016 to May 2018. All late preterm infants weighing 1800 to 1900 g considered healthy were included. The clinical characteristics, maternal and pregnancy history were described, as well as the frequency of complications during their hospital stay. Results. 21 patients were included. The majority were female (n = 13, 61.9%). The average weight of the entire population at birth was 1840 g (IQR 1800 - 1880). The median maternal age was 22 years and 9 (42.9%) of them had a maternal age at risk. There were a total of six multiple pregnancies (28.6%). Only 6/21 (28.6%) completed the prenatal steroid scheme. 19 cases (90.5%) presented at least one complication; the most common were difficulty in feeding in 76.2%, respiratory difficulty in 47.6%, thermal instability in 42.9% and hyperbilirubinemia in 33.3%. The median hospital stay was 6 days (3.5 - 12.5 IQR). Discussion. In our population, more than 90% of the late preterm presented at least one complication. The individuals with the lowest weight were those who mostly presented complications. We suggest based on these results, that all preterm infants weighing less than 1900 g have hospital surveillance 48-72hrs. [ABSTRACT FROM AUTHOR]