[Continuous intraesophageal pH monitoring in the study of gastroesophageal reflux (GER) in children. Influence of age on the considered parameters].

Gastroesophageal reflux is a very common event in children; it is studied using 24-hour intraesophageal pH-monitoring, which has a large sensitivity and specificity, but in the literature is not clear if the age of the children could have influence on the parameters considered in the pH-monitoring. The aim of our study is to assess if the age of our small patients could modify the results of pH-monitoring. During 3-year period from 1991-1993 continuous intraesophageal pH-monitoring of 45 children (29 males and 16 females), divided in three groups on the bases of age, homogeneous for number, sex and clinical symptoms, with pathologic reflux time (> 4% of 24 hours) has been evaluated. In our cases the pathologic total reflux time in 24 hours doesn't seem change with age. It has been noted that under two years of age the pH-monitoring measures are homogeneous with a tendency of reflux longer than children over two years. This older group has more after lunch refluxes; that is the number of total refluxes is larger in older children but the number of refluxes with length higher than five minutes is more in younger. These data are discussed in relation to the anatomical and functional gastroesophageal characteristics of the different age of the child.