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Experimental investigation of whether perimacular retinal folds occur due to optic nerve traction in severe head trauma

Research Project

Project/Area Number 20K10570
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 58040:Forensics medicine-related
Research InstitutionMie University (2021-2023)
Kurume University (2020)

Principal Investigator

OSHIMA TORU  三重大学, 医学系研究科, 准教授 (70464427)

Project Period (FY) 2020-04-01 – 2024-03-31
Project Status Completed (Fiscal Year 2023)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2022: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2021: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2020: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywords揺さぶられっ子症候群 / 網膜分離 / 眼軸長 / 眼底出血 / 法医病理 / 子どもの虐待 / 網膜ひだ / 虐待
Outline of Research at the Start

揺さぶられっ子症候群に特徴的な眼所見に,出血性網膜ひだがある.本所見は,硝子体から網膜が前方牽引されることによって引き起こされると考えられている.申請者の先行研究から,後方への転倒・転落による頭部打撲によって,外力ストレスが眼球後極部に及ぶことが判った.そのため,視神経からの後方牽引により眼球形状に変化が生じ,相対的な硝子体による網膜の前方牽引が起こって,出血性網膜ひだが生じ得るかについて検討する必要性が出てきた.
そこで,法医解剖例における視神経の後方牽引に基づく眼球形状の変化を,眼軸長を用いて非侵襲的に調査し,現在考えられている出血性網膜ひだの発生機序を再考する.

Outline of Final Research Achievements

Severe abusive head trauma causes perimacular retinal fold. It is believed that oscillation of the vitreous body caused by head acceleration leads to retinal traction, which might result in these folds. This study aimed to investigate whether optic nerve traction during severe head injury affects the axial length and elucidate the mechanism underlying perimacular retinal fold formation. A comparison of the axial length during experimental optic nerve traction under normal conditions did not reveal any differences. We also investigated the influence of posterior vitreous detachment on changes in axial length due to traction; however, no effect was observed. In children <2 years of age, a comparison of the axial length under normal and traction conditions revealed no difference. Perimacular retinal folds are believed to be caused by traction on the retina due to oscillation of the vitreous body, as conventionally thought.

Academic Significance and Societal Importance of the Research Achievements

本研究の結果から,眼球は眼窩内脂肪組織によって囲まれており,後頭部打撲や揺さぶりによって,眼球の形状変化が生じて出血性網膜ひだができるという成傷機序は考え難いことがわかった.このことから,出血性網膜ひだは従来通り,硝子体の振盪による網膜の前方牽引で生じていると考えられた.児童虐待による頭部外傷は家庭内という密室で起こるため司法判断が難しく,転落事故と明瞭に鑑別できないことが裁判上で大きな問題となっている.出血性網膜ひだは従来通り,重症頭部加速度損傷や揺さぶりに伴う眼損傷と考えられ,虐待に伴う頭部外傷と家庭内事故による低所転落等との成傷機転の鑑別に重要な所見と考えられた.

Report

(5 results)
  • 2023 Annual Research Report   Final Research Report ( PDF )
  • 2022 Research-status Report
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (8 results)

All 2023 2022 2021

All Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 5 results) Presentation (3 results) (of which Invited: 1 results)

  • [Journal Article] Toxicologic pathological mechanism of acute lung injury induced by oral administration of benzalkonium chloride in mice2023

    • Author(s)
      Sekijima Hidehisa、Oshima Toru、Ueji Yuno、Kuno Naoko、Kondo Yukino、Nomura Saera、Asakura Tomomi、Sakai-Sugino Kae、Kawano Mitsuo、Komada Hiroshi、Kotani Hirokazu
    • Journal Title

      Toxicological Research

      Volume: - Issue: 3 Pages: 409-418

    • DOI

      10.1007/s43188-023-00178-0

    • Related Report
      2023 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] タブレット型パソコンを用いた法医解剖所見入力システムの開発2022

    • Author(s)
      大島徹,大谷真紀,小谷泰一,美作宗太郎
    • Journal Title

      法医学の実際と研究

      Volume: 65 Pages: 220-232

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] A case of carbon monoxide poisoning before a vehicle fire: Availability of volatile hydrocarbons analysis2022

    • Author(s)
      Toru Oshima, Ako Sasao, Hidehisa Sekijima, Hirokazu Kotani
    • Journal Title

      Legal medicine

      Volume: 60 Pages: 102174-102174

    • Related Report
      2022 Research-status Report
    • Peer Reviewed
  • [Journal Article] 司法分野のデジタル化に向けた法医解剖データベースの構築2021

    • Author(s)
      大島徹, 大谷真紀, 大津由紀, 小谷泰一, 美作宗太郎
    • Journal Title

      法医学の実際と研究

      Volume: 69 Pages: 199-205

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Journal Article] Muscular Hemorrhages Around the Scapula Provide Insight on the Manner of Asphyxia A Preliminary Study2021

    • Author(s)
      Toru Oshima, Maki Ohtani, Sohtaro Mimasaka
    • Journal Title

      The American Journal of Forensic Medicine and Pathology

      Volume: 42(2) Issue: 2 Pages: 130-134

    • DOI

      10.1097/paf.0000000000000655

    • Related Report
      2021 Research-status Report
    • Peer Reviewed
  • [Presentation] 食物摂取後の塩化ベンザルコニウム中毒マウスの生存率および生存時間は食物と薬物の摂取間隔に依存する2023

    • Author(s)
      関島秀久, 杉野香江, 大島徹, 倉田智美, 原晶子, 向井陽子, 河野光雄, 駒田洋, 小谷泰一
    • Organizer
      第107次日本法医学会学術全国集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 診断支援モデルが示す乳幼児突然死症候群診断の限界2023

    • Author(s)
      小谷 泰一, 宮尾 昌, 川合 千裕, 濱保 英樹, 関島 秀久, 大島 徹
    • Organizer
      第45回 日本法医学会学術中部地方集会
    • Related Report
      2023 Annual Research Report
  • [Presentation] 「AHTを多角的に診る・考える」SBS/AHTの眼所見2022

    • Author(s)
      大島徹
    • Organizer
      第44回 日本法医学会学術中部地方集会・第69回 日本法医学会学術近畿地方集会
    • Related Report
      2022 Research-status Report
    • Invited

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Published: 2020-04-28   Modified: 2025-01-30  

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