2019 Fiscal Year Final Research Report

Formulation of food design protocol for dysphagia by quantitative analysis of biological information

Research Project

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Project/Area Number	17H02133
Research Category	Grant-in-Aid for Scientific Research (B)
Allocation Type	Single-year Grants
Section	一般
Research Field	Rehabilitation science/Welfare engineering
Research Institution	University of Yamanashi
Principal Investigator	SUZUKI Yutaka 山梨大学, 大学院総合研究部, 准教授 (40516928)
Co-Investigator(Kenkyū-buntansha)	増山敬祐山梨大学, 大学院総合研究部, 特任教授 (30181663) 阪田治東京理科大学, 工学部電気工学科, 准教授 (30391197) 谷本守正山梨大学, 大学院総合研究部, 教授 (60621323) 小谷信司山梨大学, 大学院総合研究部, 教授 (80242618) 高橋真理山梨大学, 大学院総合研究部, 臨床助教 (30622427) 初鹿恭介山梨大学, 大学院総合研究部, 助教 (20377576)
Project Period (FY)	2017-04-01 – 2020-03-31
Keywords	嚥下 / 超音波動画像 / 嚥下音 / フードデザイン
Outline of Final Research Achievements	We decided to use pharyngeal ultrasound video to establish the indicator noninvasively. We herein propose a method to obtain the movement speed and opening condition of the esophagus as well as the flow speed of the bolus, which are considered effective indicators of food-correspondent aspiration. Additionally, using this method, the flow characteristics of the esophageal wall and the bolus can be visualized and compared by extracting the elements at the time of swallowing three liquids of different viscosities. Concerned with the swallowing sound, the change in the frequency domain for the classification of swallowing sounds ( I, II, and III sound) was confirmed in this study. The optimum number of microphones and their placement were examined by performing principal component analysis on the data gathered from a multi-channel microphone.
Free Research Field	Biomedical Signal Processing
Academic Significance and Societal Importance of the Research Achievements	肺炎は日本で3番目に多い死因であり、その多くは誤嚥性肺炎に関連している。ただし、嚥下機能評価のための定量的指標はない。本研究では超音波動画像と嚥下音により嚥下評価を行うことを目的とし、その解決に向けて進展させられた。本研究結果は嚥下困難者用のフードデザインに活かされることが期待される。