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Development of appropriate design guidelines for supportive underwear to improve the stress urinary incontinence in women based on biomechanical analysis

Research Project

Project/Area Number 19K22829
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 59:Sports sciences, physical education, health sciences, and related fields
Research InstitutionRyukoku University

Principal Investigator

Tawara Daisuke  龍谷大学, 先端理工学部, 准教授 (20447907)

Co-Investigator(Kenkyū-buntansha) 二宮 早苗  大阪医科薬科大学, 看護学部, 准教授 (70582146)
岡山 久代  筑波大学, 医学医療系, 教授 (90335050)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,370,000 (Direct Cost: ¥4,900,000、Indirect Cost: ¥1,470,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2019: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Keywordsサポート下着 / 腹圧性尿失禁 / バイオメカニクス / 有限要素法 / モデリング / 軟組織 / 最適設計 / MRI / 材料特性計測 / 計算力学シミュレーション / ダミーモデル / 看護
Outline of Research at the Start

女性の尿失禁改善用サポート下着の経験と勘に基づく開発方法に代わり,生体モデルによる実験と計算力学シミュレーションによる骨盤周囲の力学的挙動の評価方法を確立し,生体力学的に裏付けされた下着の最適設計戦略を提示する.具体的に,生体類似特性のダミーモデルによる試作下着の着圧分布と膀胱挙上量の実験的評価法,サポート力を生む下着繊維の編み方のモデル化,骨盤部の筋骨格モデルに年齢・体格のばらつきを与えて下着のサポート力・着圧分布と膀胱挙上の関係を定量化する計算力学的評価法を確立し,製作可能なサポート下着の最適設計戦略を示す.

Outline of Final Research Achievements

The use of supportive underwear has been applied for preventing stress urinary incontinence (SUI) which is caused by descent of the bladder neck due to weakness in the pelvic floor muscles, because it is known that SUI can be improved by elevating the descended bladder neck. However, appropriate approaches to the underwear design are still being explored. We aimed to establish a suitable design strategy for supportive underwear instead of traditional development method based on experience and intuition. First, we made a computational model of the pelvis based on magnetic resonance images of a subject. Second, we proposed hyper elasticity of soft tissues of the buttocks, change in stiffness/anisotropy of the supportive underwear, and contraction behavior using a linear expansion coefficient. Our analyses newly elucidated a decrease of pressure from the abdomen to the pubis and an increase of pressure from the perineum to the coccyx is efficient in elevating the bladder neck.

Academic Significance and Societal Importance of the Research Achievements

第一に,経験と感覚が支配的な看護研究の姿勢に対し,工学的な手法により得られる定量的根拠に基づく解決法の提示とその重要性を示せたことで,発想の転換を狙える可能性を見出した.第二に,計算モデルによる解析が,実際の被験者を対象とする試験の代替となる発想を提示することができた.今後のヒト対象のものづくりの解決方法として,インパクトを与える可能性が期待できる.第三に,女性の羞恥心を解決するための工学手法によるサポート下着の設計戦略提示の重要性を示したことで,下着の履き心地開発やアプリのユーザービリティ開発等の新たな研究が促進される.工学,看護学双方に有益で重要な知見の新たな取得が期待できる.

Report

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

    (8 results)

All 2021 2020 2019

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (4 results) Book (1 results)

  • [Journal Article] Development of primary design guidelines for supportive underwear to elevate the bladder neck in women based on finite element analysis of the pelvis2021

    • Author(s)
      Tawara Daisuke、Nishiki Tomohiro、Ninomiya Sanae、Okayama Hisayo、Naito Kiyoko、Morikawa Shigehiro
    • Journal Title

      Proceedings of the Institution of Mechanical Engineers, Part H: Journal of Engineering in Medicine

      Volume: 236 Issue: 2 Pages: 269-278

    • DOI

      10.1177/09544119211047058

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] The effect of pelvic floor muscle training using a magnetic resonance image-based video clip in postpartum women2021

    • Author(s)
      内藤 紀代子、二宮 早苗、森川 茂廣、遠藤 善裕、岡山 久代
    • Journal Title

      Journal of Nursing Science and Engineering

      Volume: 8 Issue: 0 Pages: 194-202

    • DOI

      10.24462/jnse.8.0_194

    • NAID

      130008059773

    • ISSN
      2188-4323, 2432-6283
    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Pelvic floor muscle strength of women at postpartum month 1 and the relationship between pelvic floor muscle strength and delivery-related factors2020

    • Author(s)
      安宅 和佳奈, 岡山 久代, 内藤 紀代子
    • Journal Title

      Journal of Nursing Science and Engineering

      Volume: 7 Issue: 0 Pages: 43-50

    • DOI

      10.24462/jnse.7.0_43

    • NAID

      130007803843

    • ISSN
      2188-4323, 2432-6283
    • Related Report
      2019 Research-status Report
    • Peer Reviewed
  • [Presentation] 骨盤底筋群に作用する姿勢による尿失禁改善効果の検証:随意収縮ができなくても骨盤底筋群を強化できる方法の確立に向けて2021

    • Author(s)
      二宮早苗、内藤紀代子、岡山久代、遠藤善裕、森川茂廣
    • Organizer
      第9回看護理工学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 骨盤底機能評価における骨盤底筋トレーニング装置HnJ1000の妥当性の検討2021

    • Author(s)
      内藤紀代子、二宮早苗、森川茂廣、遠藤善裕、斎藤祥乃、岡山久代
    • Organizer
      第9回看護理工学会学術集会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 履いて改善! 生体力学に裏付けされた女性のための尿失禁改善サポート下着の開発2020

    • Author(s)
      田原大輔, 二宮早苗, 岡山久代
    • Organizer
      テックプランター滋賀2020
    • Related Report
      2020 Research-status Report
  • [Presentation] 骨盤底筋群の機能評価におけるPFMトレーナーと超音波診断装置の関連性の検討2019

    • Author(s)
      内藤紀代子, 二宮早苗, 森川茂廣, 遠藤善裕,岡山久代
    • Organizer
      第7回看護理工学会学術集会
    • Related Report
      2019 Research-status Report
  • [Book] 母性看護学-母性看護学の概要と最新の動向をわかりやすく解説-(第14章 更年期・老年期女性の健康問題と看護)2020

    • Author(s)
      岡山久代
    • Total Pages
      14
    • Publisher
      放送大学教育振興会
    • ISBN
      9784595321993
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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