• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to previous page

Exploratory research for predicting fate of type 2 endoleaks after endovascular repair of abdominal aortic aneurysms

Research Project

Project/Area Number 16K15629
Research Category

Grant-in-Aid for Challenging Exploratory Research

Allocation TypeMulti-year Fund
Research Field Cardiovascular surgery
Research InstitutionHamamatsu University School of Medicine

Principal Investigator

Unno Naoki  浜松医科大学, 医学部, 特任研究員 (20291958)

Co-Investigator(Kenkyū-buntansha) 犬塚 和徳  浜松医科大学, 医学部附属病院, 助教 (00397415)
山本 尚人  浜松医科大学, 医学部附属病院, 助教 (80402262)
Research Collaborator Takehara Yasuo  
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2018: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2017: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2016: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Keywords腹部大動脈瘤 / エンドリーク / 予後 / 4D-flow MRI解析 / CT / 4D-flow MRI / 予測因子 / 血行動態 / 大動脈瘤 / MRI / 合併症 / 血流解析 / ステントグラフト手術 / 血管外科 / 外科 / 大血管外科学 / ステントグラフト / イメージング
Outline of Final Research Achievements

We analyzed the hemodynamic features of each type II endoleak (T2EL) vessel with four-dimensional (4D)-flow magnetic resonance imaging (MRI) and comprehensively assessed multiple T2EL vessels to determine the hemodynamic parameters that can be used to predict sac shrinkage. Using the 4D-flow MRI analysis, we identified that a higher peak instantaneous flow rate and increased cumulative flow-volume rate might be associated with persistency of the T2EL vessels. A total accumulation of flow-volume per sac may predict T2ELs that cause sac expansion. A comprehensive analysis of concurrent, multiple T2EL vessels using these hemodynamic parameters may enable us to predict the fate of aneurysm sacs after endovascular aortic aneurysm repair.

Academic Significance and Societal Importance of the Research Achievements

腹部大動脈瘤に対するステントグラフト内挿術(EVAR)では、グラフト外の瘤内に血流が遺残するエンドリーク (EL) が問題となっている。T2ELは多くは自然消滅する一方で遷延し瘤径増大や瘤破裂の原因となる例もあることから、瘤の予後を予測しうる指標の確立が求められている。本プロジェクトでは、個々の EL 血管の血行動態を4D-flow MRIを用いて詳細に検討することにより、術後7日目のデータからEVAR術後1年後の瘤径増大を予測しうる指標を見出した点が重要であり、この結果から術後早期にT2EL症例に対して、選択的にT2EL血管に対する塞栓術などの介入が可能になると考えられた。

Report

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

    (12 results)

All 2019 2018 2016 Other

All Int'l Joint Research (2 results) Journal Article (2 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 2 results,  Open Access: 2 results) Presentation (8 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] Stanford University(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Stanford University(米国)

    • Related Report
      2017 Research-status Report
  • [Journal Article] Flow dynamics of type II endoleaks can determine sac expansion after endovascular aneurysm repair using four-dimensional flow-sensitive magnetic resonance imaging analysis.2019

    • Author(s)
      Katahashi K, Sano M, Takehara Y, Inuzuka K, Sugiyama M, Alley MT, Takeuchi H, Unno N.
    • Journal Title

      J Vasc Surg

      Volume: - Issue: 1 Pages: 32455-8

    • DOI

      10.1016/j.jvs.2018.09.048

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Hemodynamic Analysis of Endoleaks After Endovascular Abdominal Aortic Aneurysm Repair by Using 4-Dimensional Flow-Sensitive Magnetic Resonance Imaging2016

    • Author(s)
      Sakata M, Takehara Y, Katahashi K, Sano M, Inuzuka K, Yamamoto N, Sugiyama M, Sakahara H, Wakayama T, Alley MT, Konno H, Unno N
    • Journal Title

      Circulation Journal

      Volume: 80 Issue: 8 Pages: 1715-1725

    • DOI

      10.1253/circj.CJ-16-0297

    • NAID

      130005166111

    • ISSN
      1346-9843, 1347-4820
    • Related Report
      2016 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] A comprehensive assessment of concurrent multiple Type II endoleak vessels to predict the fate of an aneurysm sac after endovascular abdominal aortic aneurysm repair-the utility of hemodynamic parameters obtained with four-dimensional flow-sensitive MRI.2018

    • Author(s)
      Kazuto Katahashi, Naoki Unno
    • Organizer
      19th congress of Asian society for vascular surgery
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 4D-flow MRIを用いたEVAR術後II型エンドリークの血行動態学的な検討.2018

    • Author(s)
      片橋一人、佐野真規、海野直樹、山本尚人、犬塚和徳、斉藤貴明、矢田達朗、嘉山貴文、山中裕太、竹内裕也.
    • Organizer
      第59回日本脈管学会総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 術前4D-flow MRIを用いた腹部大動脈瘤分枝の血行動態解析-type II エンドリークとEVAR術後瘤径増大の術前予測因子の検討-2018

    • Author(s)
      片橋一人、佐野真規、海野直樹、山本尚人、犬塚和徳、斉藤貴明、杉澤良太、矢田達朗、嘉山貴文、山中裕太
    • Organizer
      第46回日本血管外科学会学術総会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 4D-flow MRIによるstentgraft術後endoleakの血流解析2018

    • Author(s)
      片橋一人
    • Organizer
      第86回日本心臓血管放射線研究会
    • Related Report
      2018 Annual Research Report
  • [Presentation] ステントグラフト血流の4D flowによる評価2018

    • Author(s)
      片橋一人、海野直樹
    • Organizer
      第28回日本心血管画像動態学会
    • Related Report
      2017 Research-status Report
  • [Presentation] 4D-flow MRIを用いた腹部大動脈瘤分枝の血行動態解析-2型エンドリークとEVAR術後瘤径増大の術前予測因子の検討-2018

    • Author(s)
      片橋一人、海野直樹
    • Organizer
      第46回日本血管外科学会学術総会
    • Related Report
      2017 Research-status Report
  • [Presentation] EVAR術後type II endoleakの遷延、瘤径増大に 影響を及ぼすendoleak分枝について ー4D-flowMRIによる血行動態学的危険因子の検討ー2016

    • Author(s)
      片橋一人、海野直樹
    • Organizer
      第57回日本脈管学会総会
    • Place of Presentation
      奈良
    • Year and Date
      2016-10-13
    • Related Report
      2016 Research-status Report
  • [Presentation] Hemodynamic analysis of endoleak with multiple types after endovascular abdominal aortic aneurysm repair by using four-dimensional flow-sensitive magnetic resonance imaging.2016

    • Author(s)
      Katahashi H, Unno N, et al
    • Organizer
      XXVII World Congress of the International Union of Angiology
    • Place of Presentation
      Lyon, France
    • Year and Date
      2016-10-05
    • Related Report
      2016 Research-status Report
    • Int'l Joint Research

URL: 

Published: 2016-04-21   Modified: 2022-02-21  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi