Newly developed self-expandable Niti-S MD colonic metal stent for malignant colonic obstruction
Yuki Miyasako, Toshio Kuwai, Sauid Ishaq, Kanae Tao, Hirona Konishi, Ryoichi Miura, Yuki Sumida, Kazutaka Kuroki, Yuzuru Tamaru, Ryusaku Kusunoki, Atsushi Yamaguchi, Hirotaka Kouno, Hiroshi Kohno
Abstract
BACKGROUND: Colonic stents are increasingly used to treat acute malignant colonic obstructions. The WallFlex and Niti-S D type stents are the commonly used self-expandable metallic stents available in Japan since 2012. WallFlex stent has a risk of stent-related perforation because of its axial force, while the Niti-S D type stent has a risk of obstructive colitis because of its weaker radial force. Niti-S MD type stents not only overcome these limitations but also permit delivery through highly flexible-tipped smaller-caliber colonoscopes. AIM: To compare the efficacy and safety of the newly developed Niti-S MD type colonic stents. METHODS: = 20). The primary outcome was clinical success, defined as a resolution of obstructive colonic symptoms, confirmed by clinical and radiological assessment within 48 h. The secondary outcome was technical success, defined as accurate stent placement with adequate stricture coverage on the first attempt without complications. RESULTS: < 0.05). No adverse event was observed in Group MD. CONCLUSION: In our early and limited experience, the newly developed Niti-S MD type colonic stent was effective and safe for treating acute malignant colonic obstruction.