Morphological Changes and Device Migration After Stent Graft Insertion　― Clinical Application of an Image-Based Modeling System and Analysis With Geometric Parameters ―

DOI Web Site Web Site PubMed
  • Nemoto Youkou
    Division of Vascular Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo
  • Hoshina Katsuyuki
    Division of Vascular Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo
  • Kobayashi Masaharu
    Interfaculty Initiative in Information Studies/Institute of Industrial Science, The University of Tokyo
  • Kimura Masaru
    Division of Vascular Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo
  • Yamamoto Sota
    Department of Mechanical Engineering, Graduate School, Shibaura Institute of Technology
  • Watanabe Toshiaki
    Division of Vascular Surgery, Department of Surgery, Graduate School of Medicine, The University of Tokyo
  • Ohshima Marie
    Interfaculty Initiative in Information Studies/Institute of Industrial Science, The University of Tokyo

この論文をさがす

抄録

<p>Background:Previously, we developed an image-based modeling system (V-Modeler) to investigate geometric changes in stent grafts (SGs) following their implantation for abdominal aortic aneurysms (AAAs). The aims of the present study were to improve this system for clinical use, to chronologically analyze postoperative morphological changes in SGs, and to demonstrate scenarios of SG migration.</p><p>Methods and Results:Contrast-enhanced computed tomography data from 36 patients who underwent endovascular aneurysm repair (EVAR) for AAAs were used, with 72 centerline paths, in total, analyzed for bilateral SG legs. The existing V-modeler system was modified by introducing a penalty term, optimizing the number of control points using Akaike’s information criterion, and changing the degree of the function from 3 to 5. Geometric parameters were then analyzed immediately, as well as >1 year after EVAR. Eight migrations were found and although overall SG curvature and curvature at the distal (leg) site did not change, curvature at the proximal (trunk) site of SGs decreased over time. Subanalysis revealed that SGs with severe curvature showed the same trend, whereas distal curvature increased in the non-severe curvature group. In addition, proximal curvature decreased more in Excluder than Zenith devices.</p><p>Conclusions:The present study demonstrates SG behavior after implantation with numerical values for SG length and curvature.</p>

収録刊行物

  • Circulation Journal

    Circulation Journal 82 (1), 176-182, 2018

    一般社団法人 日本循環器学会

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ