Examination of the sensor placement in the swallowing mensuration using Magneto-Impedance sensor

K. Hamaguchi ¹⁾, M. Akutagawa ²⁾, Y. Tegawa ³⁾, T. Ichikawa ³⁾, Y. Kinouchi ²⁾

¹Graduate School of Advanced Technology and Science, The Univ. of Tokushima

²Institute of Technology and Science ,The Univ. of Tokushima

³Institute of Health Biosciences ,The Univ. of Tokushima

Abstract

The objective of this study is to develop a screening device for the swallowing difficulty using magneto-impedance (MI) sensor. The video fluorography (VF) and the video endoscopic (VE) are effective to the diagnosis of swallowing difficulty.

The repetitive saliva swallowing test (RSST) is also one of the effective screening methods. In this study, we developed the screening device to automate the RSST using a MI sensor. The device is consisted of the MI sensor and the magnet. The magnet was attached on the larynx, and the MI sensor was attached on breastbone. The movement of magnet, which movement of larynx according to swallowing, was detected with the MI sensor as a change in the magnetic field.

So that we achieve the sensitivity of the sensor, it measured the larynx upheaval outskirts and movement of the trace part running out of neck to install the magnet and the sensor by for the video and it demanded the sensor output by computer simulation and tried magnetic field distribution in demanding the placement that was most suitable for RSST.

The result of this study shows, it is easy to measure when slant the magnet with 45 degrees.