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Computational fluid dynamics simulations of human voiding: a novel method using of the urodynamic study

Research Project

Project/Area Number 15K15587
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Urology
Research InstitutionDokkyo Medical University

Principal Investigator

SOH Shigehiro  獨協医科大学, 医学部, 教授 (30206669)

Co-Investigator(Kenkyū-buntansha) 岡田 弘  獨協医科大学, 医学部, 教授 (00177057)
西尾 浩二郎  獨協医科大学, 医学部, 講師 (40548335)
慎 武  獨協医科大学, 医学部, 助教 (40733126)
佐藤 両  獨協医科大学, 医学部, 助教 (80406230)
Project Period (FY) 2015-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2015: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsシミュレーション / 排尿機能 / 下部尿路 / MRI / 画像診断 / 下部尿路の形態のシミュレーション / 排尿動態2次元シミュレーション / 排尿動態3次元シミュレーション / 排尿シミュレーション技術の応用 / 3次元モデル / 膀胱 / 尿道 / 排尿機能検査 / 男性
Outline of Final Research Achievements

We simulated human voiding using DICOM data by real-time MRI. We examined the fluid dynamics of urine during human male voiding in two-dimensional analysis and three-dimensional analysis. Intravesical urine stream were confirmed to be vortex from ventral side toward dorsal side in about half of male with normal urination. It was concluded that the vortex urine stream was caused by the difference in the strength of the bladder detrusor contraction and the change in the bladder shape.To simulate urine flow, multiple intermitted 3D models were converted to a serial dynamic model with software. The Computational fluid dynamics simulation model of the human male voiding showed real-time changes in flow, pressure, and vector.
It was concluded that the occurrence of slight internal pressure deviation intra-bladder was the cause of the vortex urine stream.

Academic Significance and Societal Importance of the Research Achievements

画像診断装置によるDICOM画像での排尿動態検査方法、特に我々が研究報告したMRI画像を使用した排尿機能検査法は、これまで可視化されなかったヒト下部尿路の尿水力学的現象を確認可能とする。よって学術的に、正常排尿と排尿異常の病態理解が深まった。また、排尿障害治療薬投与前後での下部尿路形態変化を確認することが可能となることで、創薬での動物実験の必要性や、治験の方法を変える可能性がある。社会的意義として、放射線被ばくが無いだけでなく、造影剤の使用を必要としないため、被験者にとって低侵襲性といった点で多大な利点がある。そのため、小児や生殖年齢層の被験者にも繰り返し施行が可能である。

Report

(5 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Research-status Report
  • 2016 Research-status Report
  • 2015 Research-status Report
  • Research Products

    (20 results)

All 2018 2017 2016 2015

All Journal Article (1 results) Presentation (19 results) (of which Int'l Joint Research: 9 results,  Invited: 3 results)

  • [Journal Article] Real-Time MRIによる排尿機能評価2018

    • Author(s)
      宋成浩
    • Journal Title

      泌尿器外科

      Volume: 31 Pages: 747-748

    • Related Report
      2018 Annual Research Report
  • [Presentation] ヒト排尿の水力学的シミュレーション2018

    • Author(s)
      宋成浩
    • Organizer
      日本シミュレーション医学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Computational fluid dynamics simulation of male voiding: a novel method using real-time magnetic resonance image2018

    • Author(s)
      Shigehiro Soh
    • Organizer
      Annual meeting of the 2018 American Urologic Association
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 膀胱3次元モデルを用いた過活動膀胱に対するフェオテロジンフマル酸塩の治療効果判定2018

    • Author(s)
      中山晢成
    • Organizer
      日本排尿機能学会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Real-time MRIによる排尿機能評価2018

    • Author(s)
      宋成浩
    • Organizer
      日本泌尿器科学会東部総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Computational fluid dynamics simulations of male voiding2018

    • Author(s)
      Shigehiro SOH
    • Organizer
      America Urological Association Annual meeting 2018
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Evaluation of bladder function using detrusor momentum2018

    • Author(s)
      宋成浩
    • Organizer
      第106回日本泌尿器科学会総会
    • Related Report
      2017 Research-status Report
  • [Presentation] Therapeutic effects of transurethral incision for children with voiding dysfunction and obstruction of the lower urinary tract2018

    • Author(s)
      Akiyoshi Osaka
    • Organizer
      16th Urological Association of Asia Congress
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Presentation] Real Time MRIによる排尿機能評価2017

    • Author(s)
      宋成浩
    • Organizer
      第82回日本泌尿器科学会東部総会
    • Related Report
      2017 Research-status Report
  • [Presentation] MRIを利用した排尿シミュレーション2017

    • Author(s)
      宋成浩
    • Organizer
      日本超音波医学会 第29回関東甲信越地方学術講演会
    • Related Report
      2017 Research-status Report
  • [Presentation] MRIを利用した排尿シミュレーション2017

    • Author(s)
      宋成浩
    • Organizer
      第24回日本排尿機能学会
    • Related Report
      2017 Research-status Report
  • [Presentation] Computational fluid dynamics simulation of male voiding2016

    • Author(s)
      Shigehiro Soh
    • Organizer
      International Continence Society
    • Place of Presentation
      東京フォーラム(東京)
    • Year and Date
      2016-09-14
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Age related voiding function and urethral form: assessment of real-time MRI2016

    • Author(s)
      Tomoyuki Iwahata
    • Organizer
      Annual meeting of America Urologic Association
    • Place of Presentation
      San Diego (USA)
    • Year and Date
      2016-05-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] Computational fluid dynamics simulation of male voiding2016

    • Author(s)
      Shigehiro SOH
    • Organizer
      Annual meeting of America Urologic Association
    • Place of Presentation
      San Diego (USA)
    • Year and Date
      2016-05-06
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research
  • [Presentation] 男性下部尿路の成長による形態変化と排尿機能の関連性についての検討2016

    • Author(s)
      岩端威之
    • Organizer
      日本泌尿器科学会総会
    • Place of Presentation
      仙台国際センター(宮城)
    • Year and Date
      2016-04-23
    • Related Report
      2016 Research-status Report
  • [Presentation] Real-time MRI assessment of age-related voiding function and urethral form2016

    • Author(s)
      Shigehiro Soh
    • Organizer
      Asia Pacific Association of Pediatric Urology
    • Place of Presentation
      Kuala Lumpur
    • Year and Date
      2016-01-14
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research / Invited
  • [Presentation] role of the pelvic floor and prostate in male voiding: A Magnetic Resonance Imaging study2015

    • Author(s)
      Shigehiro Soh
    • Organizer
      International Continence Society
    • Place of Presentation
      Montreal
    • Year and Date
      2015-10-08
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research
  • [Presentation] 3Dモデルによる排尿機能検査の試み2015

    • Author(s)
      宋成浩
    • Organizer
      第80回日本泌尿器科学会東部総会
    • Place of Presentation
      東京
    • Year and Date
      2015-09-26
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] 画像を使用した未来の診断技術2015

    • Author(s)
      宋成浩
    • Organizer
      第24回日本小児泌尿器科学会
    • Place of Presentation
      東京
    • Year and Date
      2015-07-03
    • Related Report
      2015 Research-status Report
    • Invited
  • [Presentation] Three-dimensional simulation of urine voiding mechanism in healthy adult male2015

    • Author(s)
      Shigehiro Soh
    • Organizer
      International Conference on Complex Medical Engineering
    • Place of Presentation
      Okayama
    • Year and Date
      2015-06-19
    • Related Report
      2015 Research-status Report
    • Int'l Joint Research

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Published: 2015-04-16   Modified: 2020-03-30  

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