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The Development of a Portable Aspiration Diagnostic Device Comprising a Method for Analyzing Swallowing Sounds

Research Project

Project/Area Number 17592092
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Surgical dentistry
Research InstitutionNagasaki University

Principal Investigator

ISHITOBI Shingo  Nagasaki University, Hospital of Medicine and Dentistry, Assistant Professor (60363454)

Co-Investigator(Kenkyū-buntansha) AYUSE Takao  Nagasaki University, Graduate School of Biomedical sciences, Associate Professor (20222705)
Project Period (FY) 2005 – 2007
Project Status Completed (Fiscal Year 2007)
Budget Amount *help
¥3,840,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2006: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2005: ¥2,300,000 (Direct Cost: ¥2,300,000)
Keywordsanalyzing swallowing sounds / diagnosis of the aspiration / videofluorography / videoendoscapic examination of swallowing / 誤嚥 / 声門閉鎖 / 嚥下音
Research Abstract

An analysis of swallowing sounds using the swallowing sounds of healthy subjects as samples has verified that swallowing sounds comprise complex elements, but normally consist of three major elements. The related mechanisms were further studied by the use of an electromyogram and the measurement of the swallowing pressure.
Regarding the examination of aspiration using swallowing sounds, it is difficult to obtain the sounds of objects passing through the windpipe generated during the act of swallowing, and we discovered that it is also difficult to examine cases of aspiration using only swallowing sounds.
Therefore, we studied a method for determining intralaryngeal invasion and the occurrence of aspiration in minute amounts by analyzing the frequency of moist expiratory sounds during aspiration and then analyzing changes in vocal cord vibration. We focused particularly on changes in vocal cord vibration during phonation and attempted to detect minor supraglottic changes by analyzing the formant and basic frequency of the sound spectrogram. We discovered that a consistent change occurred in the formant waves in association with occurrences of aspiration and intralaryngeal invasion, thereby indicating the effectiveness of these analyses for future determinations of aspiration.

Report

(4 results)
  • 2007 Annual Research Report   Final Research Report Summary
  • 2006 Annual Research Report
  • 2005 Annual Research Report
  • Research Products

    (6 results)

All 2008 2007

All Presentation (6 results)

  • [Presentation] 重症筋無力症の嚥下機能評価に関する検討2008

    • Author(s)
      石飛 進吾
    • Organizer
      免疫性神経疾患に関する調査研究瑳19年度班会議
    • Place of Presentation
      東京
    • Year and Date
      2008-01-24
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 重症筋無力症の嚥下機能評価に関する検討2008

    • Author(s)
      石飛 進吾
    • Organizer
      免疫性神経疾患に関する調査研究班19年度班会議
    • Place of Presentation
      東京
    • Year and Date
      2008-01-24
    • Related Report
      2007 Annual Research Report
  • [Presentation] examination about the evaluation of swallowing function of myasthenia gravis.2008

    • Author(s)
      Shingo, Ishitobi
    • Organizer
      Research conference for Immunologic neurologic disease
    • Place of Presentation
      Tokyo
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 肺炎予防に対する摂食・嚥下リハビリテーションチニム介入の効果2007

    • Author(s)
      石飛 進吾
    • Organizer
      第13回長崎県呼吸ケア研究会
    • Place of Presentation
      長崎
    • Year and Date
      2007-11-19
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2007 Final Research Report Summary
  • [Presentation] 肺炎予防に対する摂食・嚥下リハビリテーションチーム介入の効果2007

    • Author(s)
      石飛 進吾
    • Organizer
      第13回長崎県呼吸ケア研究会
    • Place of Presentation
      長崎
    • Year and Date
      2007-11-19
    • Related Report
      2007 Annual Research Report
  • [Presentation] effects of Pneumonia prevention by Intervention of dysphagia rehabiritation t eam2007

    • Author(s)
      Shingo, Ishitobi
    • Organizer
      Society for study of Breathing care
    • Place of Presentation
      Nagasaki
    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2007 Final Research Report Summary

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Published: 2005-04-01   Modified: 2016-04-21  

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