[Variability of pHmetric parameters in the esophagogastric junction in dogs]

The authors studied the variability of pHmetric parameters of the gastroesophageal junction in dog. The research was done in six dogs, that studied in five sections, according to four techniques (intermittent pull-through technique, continuous pull-through technique, continuous push-through technique and rapid pull-through technique), with four determinations in each of them. The pHmetric determinations of stomach, oesophagus and gradient of esophagogastric pH presented little variability (coefficient of variation less than 50%). The constituent parameters of the pHmetric profile and the pHmetric lenght of the gastroesophageal junction presented high variability (coefficient of variation bigger than 100%), except the C2 segment. Taking into consideration the little variability the authors propose the study of C2 segment in the analysis of the pHmetric profile of the gastroesophageal junction.