Implementation of a Magnetic Stimulator to Study the Human Stomach Activity

Abstract

Implementation of a magnetic stimulator, arranged in a Helmholtz configuration, to study the mechanical activity on human stomachs is presented. In this work, a biomagnetic modality was used, this include swallowed of an oral magnetic contrast made up with 2, 3, 4 or 5 g of ferromagnetic particles diluted in 250 mL of yogurt. After a volunteer had swallowed the oral contrast, a biomagnetic pulse around 15 mT was applied, and then the remanent field is relaxed by mechanical contractions produced on the stomach wall. These studies were performed in 11 health male volunteers, where peristaltic frequencies were measured and a average value of 3.18 cpm was obtained.