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CC BY 4.0 · Endosc Int Open 2025; 13: a26950679
DOI: 10.1055/a-2695-0679
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Novel segmentally deployable self-expandable metallic stent in malignant colorectal obstruction

Authors

  • Takashi Murakami 

    1   Department of Gastroenterology, Juntendo University, Postgraduate School of Medicine, Tokyo, Japan

  • Tomonori Yamauchi

    1   Department of Gastroenterology, Juntendo University, Postgraduate School of Medicine, Tokyo, Japan

  • Eiji Kamba

    1   Department of Gastroenterology, Juntendo University, Postgraduate School of Medicine, Tokyo, Japan

  • Sho Takahashi

    1   Department of Gastroenterology, Juntendo University, Postgraduate School of Medicine, Tokyo, Japan

  • Yusuke Takasaki

    1   Department of Gastroenterology, Juntendo University, Postgraduate School of Medicine, Tokyo, Japan

  • Akihito Nagahara

    1   Department of Gastroenterology, Juntendo University, Postgraduate School of Medicine, Tokyo, Japan
    2   Department of Pathophysiological Research and Therapeutics for Gastrointestinal Disease, Juntendo University Faculty of Medicine, Tokyo, Japan

  • Hiroyuki Isayama 

    1   Department of Gastroenterology, Juntendo University, Postgraduate School of Medicine, Tokyo, Japan
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Introduction

We report two successful cases of colonic stenting using a newly developed self-expandable metallic stent (SEMS) with suture-based segmental-release deployment system (SR), the Bactrian SR colonic stent (SB-Kawasumi Laboratories Inc., Kanagawa, Japan). This novel uncovered SEMS is made from nickel-titanium features hook-and-cross braided design that provides low axial and sufficient radial forces [1]. The delivery system has a three-layer design comprising an outer sheath, suture-based deployment system, and inner catheter. This system has three independently deployable segments — oral, central, and anal — whose deployment order can be selected ([Fig. 1], [Video 1]). Compared with the conventional one-step outer sheath pulling-back deployment, the deployment order from oral/anal deployment at the center may be more effective for precise placement [2].

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Fig. 1 Demonstration of deployment of the segmental-release self-expandable metallic stent (SEMS), Bactrian SR colonic stent (SB-Kawasumi Laboratories Inc., Kanagawa, Japan), in vitro. a SEMS before deployment. The SEMS was deployed in the following order: b anal, c oral, and d central segments. These segments can be released at any order of magnitude.
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Deployment of segmentally deployable self-expandable metallic stents in two cases of malignant colorectal obstruction.Video 1



Publikationsverlauf

Eingereicht: 24. Mai 2025

Angenommen nach Revision: 19. August 2025

Artikel online veröffentlicht:
15. September 2025

© 2025. The Author(s). This is an open access article published by Thieme under the terms of the Creative Commons Attribution License, permitting unrestricted use, distribution, and reproduction so long as the original work is properly cited. (https://creativecommons.org/licenses/by/4.0/).

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Bibliographical Record
Takashi Murakami, Tomonori Yamauchi, Eiji Kamba, Sho Takahashi, Yusuke Takasaki, Akihito Nagahara, Hiroyuki Isayama. Novel segmentally deployable self-expandable metallic stent in malignant colorectal obstruction. Endosc Int Open 2025; 13: a26950679.
DOI: 10.1055/a-2695-0679
 

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