Revista do Hospital das Clínicas
On-line version ISSN 1678-9903
PRECIOSO, Alexander Roberto; PEREIRA, Gilberto R. and VAZ, Flávio Adolfo Costa. Gastric myoelectrical activity in neonates of different gestational ages by means of electrogastrography. Rev. Hosp. Clin. [online]. 2003, vol.58, n.2, pp. 81-90. ISSN 1678-9903. http://dx.doi.org/10.1590/S0041-87812003000200005.
PURPOSE: to describe the patterns of the gastric myoelectrical activity, pre-and postprandially, in clinically stable neonates of different gestational ages, during their first two weeks of life by means of Electrogastrography. PATIENTS AND METHODS: Electrogastrography was recorded in forty-five clinically stable neonates of different gestational ages (group I: 15 neonates of > 37 weeks, group II: 15 premature neonates of 32-37 weeks; Group III: 15 premature neonates of 28-31 weeks) receiving intermittent enteral feedings during their first two weeks of life. Electrogastrography recordings were performed for 1 hour pre-and postprandially. The Electrogastrography signal was recorded using the portable MicroDigitrapper Electrogastrography recording device and after motion artifacts were deleted, the remaining Electrogastrography data were submitted to quantitative analysis based on the "Running Spectrum Analysis". RESULTS: The percentages of normogastria, pre-and postprandially were greater than the percentages of gastric dysrythmias in all three studied groups. Furthermore, all neonates had the mean values of the Electrogastrography dominant frequency predominantly within the normogastria range, in both periods analyzed. There were no significant differences in the relative change of the Electrogastrography dominant power among the groups. CONCLUSION: This study demonstrates that the Electrogastrography patterns are similar between premature and full term neonates during the pre-and postprandial periods. The results of this study also indicate that the gastric myoelectrical activity in premature and full term neonates is immature, as compared to that described for older neonates, children and adults.
Keywords : Electrogastrography; Gastric myoelectrical activity; Neonates; Different gestational ages; Pre-and postprandial periods.