Deglutition evaluation system of swallowing-assisting food based on swallowing sound measurement

Abstract

This study investigated the effect of cold carbonated water and jelly foods on swallowing movements. Phonocardiographic sensors were attached to the subject's neck, and swallowing sounds obtained when subjects swallowed samples were measured with a bio sound analyzer (BSA). Parameter P was used to evaluate swallowing movements. P tended to decrease when swallowing cold carbonated water. Furthermore, P decreased when swallowing jelly foods compared to swallowing regular water, suggesting that aspiration can be prevented using cold carbonated water and jelly foods.