Resumen

PADILLA MARTINEZ, Yadira Mayela  y  HERNANDEZ HERRERA, Ricardo Jorge. Conditions associated with mortality in neonates weighing < 1000 g at the Obstetric-Gynecology Hospital, Unit N° 23, Monterrey, Mexico (2005-2006). Bol. Med. Hosp. Infant. Mex. [online]. 2010, vol.67, n.4, pp. 335-343. ISSN 1665-1146.

Background. Mortality in neonates <1 000 g has decreased since the 1970s until now from 90% to 55%, but neurological sequelae and hospital stay have increased. We undertook this study in order to determine the prevalence and etiology of mortality in neonates <1 000 g in an Ob-Gyn Unit of the IMSS. Methods. Causes of death in neonates weighing <1 000 g were obtained from hospital registries using dispersion, rates and proportions. Results. During a 1-year period, 18 952 neonates were born; 152 (0.8%) weighed <1 000 g and 98(64%) did not survive. There were 54 (55.1%) males and 44 (44.9%) females (1.2:1). The mean weight was 760 g, and mean gestational age was 26 weeks (range: 22-35 weeks). The principal causes of deaths were immaturity in 28/98 cases (28%), intracranial hemorrhage (ICH) in 22/98 (22%), sepsis in 17/98 (17%), pulmonary hemorrhage in 9/98 (9%) and multiple organ failure in 3/98 (3%). Conclusion. Mortality in neonates with very low birth weight (VLBW, <1 000 g) was 64%. Immaturity, ICH and sepsis were the main causes of death. Half of these deaths occurred during the first 48 h of life.

Palabras llave : newborn; very low birth weight; mortality.