Novel segmentally deployable self-expandable metallic stent in malignant colorectal obstruction

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].