| Budget Amount *help |
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2014: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Outline of Final Research Achievements |
We designed detective systems for swallowing movement using intra-aural swallowing sounds and optical fiber sensors and evaluated their usefulness in this study.
We found that characteristic click-like sounds in intra-aural swallowing sounds were related to the Eustachian tube’s quick open- close movements. Using this sound as the indicator, timing of repetitive saliva swallowing was precisely measured in healthy volunteers. It was found that aging caused a deterioration in the swallowing ability even without any subjective complaints, which could be better detected with the intra-aural swallowing sounds than with a conventional test such as repetitive saliva swallowing test. Utilizing micro-bending loss of the optical fibers, we designed a detective system for laryngeal movements during swallowing by placing the optical fiber on the neck. This system was found sensitive enough to detect swallowing movement especially with simultaneous recordings of intra-aural swallowing sounds.
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