• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Clarification of swallowing mechanisms by numerical simulation using realistic geometry

Research Project

Project/Area Number 19K20672
Research Category

Grant-in-Aid for Early-Career Scientists

Allocation TypeMulti-year Fund
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionKobe University

Principal Investigator

Ishida Shunichi  神戸大学, 工学研究科, 助教 (80824169)

Project Period (FY) 2019-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2020: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2019: ¥2,340,000 (Direct Cost: ¥1,800,000、Indirect Cost: ¥540,000)
Keywords計算バイオメカニクス / 消化器系バイオメカニクス / 計算力学 / 数値流体力学 / 嚥下 / 嚥下障害 / 嚥下流動
Outline of Research at the Start

嚥下流動は多くの器官運動と食塊運動が複雑に絡み合った現象であり,従来の観察と経験による医学的なアプローチでは嚥下機能の定量的な評価に至っていない.本研究では,力学ベースの新しい方法論として,医用画像を基にした嚥下流動の計算力学モデルを構築し,嚥下過程の力学的・運動学的メカニズムを解明する.種類や量などの食塊の条件および,器官運動や姿勢などの嚥下条件の違いによる嚥下動態の変化を流体力学変数によって整理・検討することにより,器官運動と食塊運動の力学的な相互作用を定量的に記述し,正常な嚥下とは何かを力学に基づき定義する.その知見に基づき最終的に嚥下機能の定量評価のための新たな力学的指標を提案する.

Outline of Final Research Achievements

We developed a computational fluid dynamics model of swallowing based on medical imaging. The model showed that the impaired pharyngeal motion causes insufficient pharyngeal pressure, which increases the pharyngeal bolus residue. In addition, the decreased pharyngeal contraction made swallowing of high-viscosity boluses more difficult, suggesting that pharyngeal pressure due to pharyngeal contraction is important for stable swallowing.

Academic Significance and Societal Importance of the Research Achievements

嚥下機能が低下し,正常な嚥下が困難な状態を「嚥下障害」と呼ぶが,評価・診断指標は主観によるところが大きい.嚥下流動の詳細な様子を観察するのは困難であり,正常な嚥下においてさえどのような力学条件で達成されているのか十分明らかではない.
本研究では,嚥下流動のコンピュータシミュレーション(数値流体力学解析)により,正常な嚥下における力学条件に関する知見を得た.

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (10 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results) Presentation (7 results) (of which Int'l Joint Research: 3 results,  Invited: 1 results)

  • [Journal Article] Liquid transport produced by a cluster of peristaltic contractions in a circular channel2021

    • Author(s)
      Oyama Tomoki、Ishida Shunichi、Maeyama Kohei、Miyagawa Taimei、Imai Yohsuke
    • Journal Title

      Physical Review Fluids

      Volume: 6 Issue: 9 Pages: 093102-093102

    • DOI

      10.1103/physrevfluids.6.093102

    • NAID

      120007165714

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Rheology of a dilute ferrofluid droplet suspension in shear flow: Viscosity and normal stress differences2020

    • Author(s)
      Ishida Shunichi、Matsunaga Daiki
    • Journal Title

      Physical Review Fluids

      Volume: 5 Issue: 12 Pages: 123603-123603

    • DOI

      10.1103/physrevfluids.5.123603

    • NAID

      120006954056

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Journal Article] A computational fluid dynamics simulation of liquid swallowing by impaired pharyngeal motion: bolus pathway and pharyngeal residue2019

    • Author(s)
      Ohta Jun、Ishida Shunichi、Kawase Tetsuaki、Katori Yukio、Imai Yohsuke
    • Journal Title

      American Journal of Physiology-Gastrointestinal and Liver Physiology

      Volume: 317 Issue: 6 Pages: G784-G792

    • DOI

      10.1152/ajpgi.00082.2019

    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] Effect of peristaltic frequency on gastric emptying: a simulation study2021

    • Author(s)
      Rika Ebara, Shunichi Ishida, Taimei Miyagawa, Yohsuke Imai
    • Organizer
      The 11th Asian-Pacific Conference on Biomechanics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Cumulant lattice Boltzmann method for peristaltic transport of power-law fluids2021

    • Author(s)
      Kohei Maeyama, Shunichi Ishida, Yohsuke Imai
    • Organizer
      The 11th Asian-Pacific Conference on Biomechanics
    • Related Report
      2021 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 嚥下の三次元数値シミュレーション:嚥下の冗長性と咽頭圧の関係2021

    • Author(s)
      石田駿一,福嶋泰人,太田淳,川瀬哲明,香取幸夫,今井陽介
    • Organizer
      第34回計算力学講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 嚥下流動の数値流体力学解析2021

    • Author(s)
      石田駿一,福嶋泰人,太田淳,川瀬哲明,香取幸夫,今井陽介
    • Organizer
      第33回バイオエンジニアリング講演会
    • Related Report
      2021 Annual Research Report
  • [Presentation] Development of a CFD simulator of whole cerebral blood flow2020

    • Author(s)
      Shunichi Ishida, Hiroki Kitade, Satoshi Ii, Yohsuke Imai, Shigeo Wada
    • Organizer
      The 3rd International Conference on Computational Engineering and Science for Safety and Environmental Problems
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] 流体中の膜挙動に対するisogeometric流体構造連成手法の開発2020

    • Author(s)
      浅井悠佑,石田駿一,今井陽介
    • Organizer
      第25回計算工学講演会
    • Related Report
      2020 Research-status Report
  • [Presentation] 格子ボルツマン法による生体流れの数値計算2019

    • Author(s)
      石田駿一
    • Organizer
      第31回格子ボルツマンの基礎と応用に関する研究会
    • Related Report
      2019 Research-status Report
    • Invited

URL: 

Published: 2019-04-18   Modified: 2023-01-30  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi