Magnetogastrography (MGG) reproducibility assessments of gastric emptying on healthy subjects.

The aim of this study was to evaluate the half-time gastric emptying reproducibility measured by magnetogastrography (MGG). Seven healthy subjects were subjected to a magnetic pulse of 32 mT for 17 ms, seven times in 90 min. The procedure was repeated one and two weeks later. Assessments of the gastric emptying were carried out for each one of the measurements and statistical analyses of ANOVA and Bland-Altman were performed for every group of data. A mean of 21.7 +/- 3.3 min was measured for the half-time of gastric emptying for yoghurt. Reproducibility estimation was above 85%. Therefore, magnetogastrography seems to be a reliable technique to be implemented in routine clinical trials.