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Fundamental study on thermal and hydrodynamic effect of laser induced bubble for TUL on surrounding field

Research Project

Project/Area Number 20K12610
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 90110:Biomedical engineering-related
Research InstitutionKanazawa Institute of Technology

Principal Investigator

Sugimoto Yasuhiro  金沢工業大学, 工学部, 教授 (00319039)

Project Period (FY) 2020-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2021: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2020: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords結石破砕 / レーザ誘起気泡 / CEM43℃ / TUL / URS / Bubble dynamics / パルスレーザ誘起気泡 / 温度計測 / レーザー誘起気泡 / 気泡誘起流れ / 気泡誘起圧力 / 温度分布
Outline of Research at the Start

TUL(経尿道的結石破砕術)を用いた結石破砕において最終的に患者および医師に負担の少ない手術法を提案する.その基礎的な要素として,パルスレーザ照射時の周囲流体,気泡および周囲壁面への熱影響を把握する.また,尿管のような比較的狭い空間で形成される気泡によって大きく変形する壁面の挙動を捉え体内組織へのダメージを把握する.さらには,形成される気泡によって駆動される結石の挙動を周囲流れ場とともに把握する.

Outline of Final Research Achievements

TUL or URS is a typical method of lithotripsy. In this treatment method, a medical doctor irradiates a pulsed laser through an optical fiber to break up the stones. There are two mechanisms of stone breakage: photoacoustic (impact during bubble formation and collapse) and photothermal (heat from the laser). On the other hand, the movement of the stone to be crushed and the generation of thermal damage to the surrounding tissue due to the heat of the irradiated pulsed laser energy are problematic. Through this research project, we clarified the behavior of stones and bubbles by simulating the treatment condition, and showed the possibility of thermal damage to the surrounding tissues by measuring temperatures.

Academic Significance and Societal Importance of the Research Achievements

TULを用いた結石破砕において最終的に患者および医師に負担の少ない手術法を提案することが本研究の目的である.臨床医師は症例,すなわち経験が多いほど治療スキルが高くなる.これは経験つまり工学分野における実験を繰り返しているからである.この作業をできるだけ少なくできれば,患者の負担及び医師の負担の軽減につながる.本研究成果で示した気泡挙動,結石の挙動,熱傷領域の評価によって,医師の手術における効果的およびリスクの高いレーザ照射条件を提示できた.この知見は臨床医師の負担軽減と患者へのリスク低減につながると考える.

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (12 results)

All 2023 2022 2021 2020

All Journal Article (2 results) (of which Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (10 results) (of which Int'l Joint Research: 4 results)

  • [Journal Article] Bubble Behavior and Temperature Distribution around Bubble Induced by Pulsed Laser for Medical Treatment2022

    • Author(s)
      杉若一輝,杉本康弘,福江高志
    • Journal Title

      JAPANESE JOURNAL OF MULTIPHASE FLOW

      Volume: 36 Issue: 1 Pages: 107-114

    • DOI

      10.3811/jjmf.2022.009

    • ISSN
      0914-2843, 1881-5790
    • Year and Date
      2022-03-15
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Measurements of Laser Induced Bubble Behavior in Elastic Tube and Temperature around Bubble in TUL Treatment2020

    • Author(s)
      Sugimoto Yasuhiro、Hamamoto Masamichi
    • Journal Title

      Journal of Flow Control, Measurement & Visualization

      Volume: 08 Issue: 03 Pages: 134-145

    • DOI

      10.4236/jfcmv.2020.83008

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] Evaluation of burn area based on CEM43 using temperature distribution around medical pulsed laser induced bubble2023

    • Author(s)
      Yasuhiro Sugimoto, Ikkei Araga, Takashi Fukue
    • Organizer
      11th International Conference on Multiphase Flow (ICMF 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Laser-induced bubble collapse behavior near adjacent rigid and soft walls2023

    • Author(s)
      Ritsuki Kamei, Yasuhiro Sugimoto
    • Organizer
      11th International Conference on Multiphase Flow (ICMF 2023)
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 医療用パルスレーザ誘起気泡近まわりの温度分布に基づくCEM43℃を用いた熱傷領域評価2022

    • Author(s)
      杉本康弘,荒賀一慶,福江高志,
    • Organizer
      混相流シンポジウム 2022
    • Related Report
      2022 Annual Research Report
  • [Presentation] 隣接する剛体壁と軟質壁近傍のレーザ誘起気泡の崩壊挙動2022

    • Author(s)
      亀井 律希, 杉本 康弘
    • Organizer
      日本機械学会第100期流体工学部門講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] レーザ結石破砕術におけるCEM43を用いた人体組織に与える熱影響の評価2022

    • Author(s)
      荒賀一慶,杉若 一輝,杉本康弘,福江高志
    • Organizer
      日本機械学会北陸信越支部2022 年合同講演会
    • Related Report
      2021 Research-status Report
  • [Presentation] Behavior of a Sphere Caused by Pulsed Laser Induced Bubble simulating Stone Crushing with TUL2021

    • Author(s)
      Y. Sugimoto, and S. Obata
    • Organizer
      the 11th International Symposium on Cavitation (CAV2021)
    • Related Report
      2021 Research-status Report
    • Int'l Joint Research
  • [Presentation] 医療用パルスレーザ誘起気泡まわりの温度分布計測2021

    • Author(s)
      杉若一輝,杉本康弘
    • Organizer
      キャビテーションに関するシンポジウム(第20回)
    • Related Report
      2021 Research-status Report
  • [Presentation] 医療用パルスレーザ誘起気泡による温度上昇に対する検討2021

    • Author(s)
      杉若一輝,杉本康弘
    • Organizer
      混相流シンポジウム 2021
    • Related Report
      2021 Research-status Report
  • [Presentation] Behavior of a Sphere Caused by Pulsed Laser Induced Bubble simulating Stone Crushing with TUL2021

    • Author(s)
      Y. Sugimoto, and S. Obata,
    • Organizer
      the 11th International Symposium on Cavitation (CAV2021)
    • Related Report
      2020 Research-status Report
    • Int'l Joint Research
  • [Presentation] パルスレーザ誘起気泡の挙動および周囲の温度分布計測2021

    • Author(s)
      杉若 一輝,杉本 康弘
    • Organizer
      日本機械学会北陸信越支部第58期総会講演会
    • Related Report
      2020 Research-status Report

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Published: 2020-04-28   Modified: 2024-01-30  

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