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Development of fetal therapy protocol using next-generation HIFU transducer

Research Project

Project/Area Number 19K09763
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 56040:Obstetrics and gynecology-related
Research InstitutionShowa University

Principal Investigator

Ichizuka Kiyotake  昭和大学, 医学部, 教授 (00338451)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥4,420,000 (Direct Cost: ¥3,400,000、Indirect Cost: ¥1,020,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2019: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
KeywordsHIFU / 胎児治療 / 強出力集束超音波 / 胎児横隔膜ヘルニア
Outline of Research at the Start

本研究では平成31年度から平成33年度の3年間で電子制御マルチチャンネル可変焦点HIFUトランスデューサに脱気冷却循環装置を一体化させた次世代型HIFU治療器を作成し、同HIFU治療機を用いて動物実験を行う。動物実験からHIFU照射条件に関する諸条件の知見を得て、HIFU照射手技の確立を経て、ヒト胎児疾患に対するHIFUを用いた胎児治療が行える前段階まで胎児に対する電子制御可変焦点HIFUトランスデューサを備えたHIFU治療機器ユニットの技術革新を進める。特に精密性が求められるヒト胎児各種疾患の治療への応用へ資するための新知見、臨床手技を得ることが本研究の目的である。

Outline of Final Research Achievements

The present study was conducted to develop a next-generation HIFU therapy device that integrates a degassing cooling circulation device with a multifocal HIFU transducer and to optimize the HIFU irradiation sequence. Through these efforts, we hoped to obtain new knowledge and develop clinical techniques that might facilitate the application of this approach to the treatment of human fetal diseases. We performed experiments to develop a protocol for applying HIFU to fetoscopic endotracheal occlusion (FETO) balloon removal after FETO for fetal congenital diaphragmatic hernia. We determined the optimal HIFU irradiation conditions that enabled balloon rupture and identified conditions that might aid in developing a protocol for application to fetal congenital diaphragmatic hernia.

Academic Significance and Societal Importance of the Research Achievements

少子化に歯止めががかからない現状で今までは助けることのできない胎児に対して胎児治療を行い無事胎児を出産に導くことは社会的課題と言える。胎児治療で最も重要なことは母体及び胎児への安全性の配慮である。しかし、現行の胎児外科治療は母体腹壁を通して医療機器を子宮腔内へ挿入する必要がある。そのため早産のリスクが少なからず存在する。一方、HIFU照射は母体に非侵襲で胎児治療を行を安全に行い得る。従来FETOバルーン除去は医療機器の子宮内挿入が必須であり母体侵襲を伴う。本研究成果では医療機器の子宮内挿入なしでバルーの除去を可能とする諸条件に関する知見を集積できたことは学術的のみならず社会的意義も大きい。

Report

(5 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (15 results)

All 2022 2021 2020 2019 2018

All Journal Article (6 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 4 results,  Open Access: 4 results) Presentation (9 results) (of which Int'l Joint Research: 1 results,  Invited: 3 results)

  • [Journal Article] High-intensity focused ultrasound for noninvasive fetal therapy2022

    • Author(s)
      Ichizuka Kiyotake、Seo Kohei、Izudepski Tetsuya、Nagatsuka Masaaki
    • Journal Title

      Journal of Medical Ultrasonics

      Volume: -

    • DOI

      10.1007/s10396-022-01199-2

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Imaging Small Fetal Parts by High-resolution Ultrasound2021

    • Author(s)
      Ichizuka K, Kawase H, Iki M, Hirose K, Sanai Y.
    • Journal Title

      onald School Journal of Ultrasound in Obstetrics and Gynecology

      Volume: 15 Issue: 3 Pages: 245-248

    • DOI

      10.5005/jp-journals-10009-1704

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Risk factors for cerebral palsy in neonates due to placental abruption2021

    • Author(s)
      Ichizuka K, Toyokawa S, Ikenoue T, Satoh S, Hasegawa J, Ikeda T, Tamiya N, Nakai A, Fujimori K, Maeda T, Kanayama N, Masuzaki H, Iwashita M, Suzuki H, Takeda S.
    • Journal Title

      J Obstet Gynaecol Res.

      Volume: 47 Issue: 1 Pages: 9-13

    • DOI

      10.1111/jog.14447

    • NAID

      120007166915

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] 胎児形態評価2020

    • Author(s)
      市塚清健
    • Journal Title

      周産期医学

      Volume: 50 Pages: 1220-1223

    • Related Report
      2020 Research-status Report
  • [Journal Article] 産婦人科領域における微小血流観察SMIの有用性2019

    • Author(s)
      市塚清健、奥山亜由美、瀬尾晃平、土肥聡、長塚正晃
    • Journal Title

      映像情報

      Volume: 86 Pages: 1085-1089

    • Related Report
      2019 Research-status Report
  • [Journal Article] Twin-Reversed Arterial Perfusion Sequence Using High-Intensity Focused Ultrasound Therapy2018

    • Author(s)
      Seo Kohei、Ichizuka Kiyotake、Okai Takashi、Dohi Satoshi、Nakamura Masamitsu、Hasegawa Junichi、Matsuoka Ryu、Yoshizawa Shin、Umemura Shin-ichiro、Nagatsuka Masaaki、Sekizawa Akihiko
    • Journal Title

      Ultrasound in Obstetrics & Gynecology

      Volume: 印刷中 Issue: 1 Pages: 128-134

    • DOI

      10.1002/uog.20101

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] AIによる3D超音波データセットを用いたCRLの自動計測法の開発に向けた基礎的検討2022

    • Author(s)
      市塚清健、瀬尾晃平、奥山亜由美、小谷美帆子、長塚正晃
    • Organizer
      第74回日本産科婦人科学会学術講演会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 胎児形態異常評価における3Dエコーの有用性2022

    • Author(s)
      市塚清健
    • Organizer
      第1回日本産婦人科超音波研究会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 胎児中枢神経の見方2022

    • Author(s)
      市塚清健
    • Organizer
      第143回関東連合産科婦人科学会学術集会
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 胎児中枢神経疾患2022

    • Author(s)
      市塚清健
    • Organizer
      第11回日本母体胎児医学会超音波セミナー
    • Related Report
      2022 Annual Research Report
    • Invited
  • [Presentation] 超音波―胎児診断と胎児治療―2021

    • Author(s)
      市塚清健
    • Organizer
      第18回日本胎児治療学会学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 胎児診療にエビデンスを活かす2021

    • Author(s)
      市塚清健
    • Organizer
      第142回関東連合産科婦人科学会総会・学術集会
    • Related Report
      2021 Research-status Report
  • [Presentation] 胎児超音波の基礎と応用2020

    • Author(s)
      市塚清健
    • Organizer
      第35回秋田県周産期・新生児医療研究会
    • Related Report
      2020 Research-status Report
    • Invited
  • [Presentation] Reference range of the fetal anal sphincter from 22 to 37 weeks of gestation.2019

    • Author(s)
      K Ichizuka, M Iki, H Kawase, A Okuyama, K Seo, S Dohi, K Hirose, Y Sanai, M Nagatsu
    • Organizer
      29th World Congress on Ultrasound in Obstetrics and Gynecology
    • Related Report
      2019 Research-status Report
    • Int'l Joint Research
  • [Presentation] Selection of image construction method of 3D ultrasound in fetal evaluation2019

    • Author(s)
      K Ichizuka
    • Organizer
      11th Japan Ian Donald advance seminar
    • Related Report
      2019 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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