US 12,232,988 B2
Medical stent and stent delivery device
Ryosuke Sakai, Sagamihara (JP); Toshihiro Yamagata, Hachioji (JP); Kazuhiro Noda, Ebina (JP); Yuko Kirino, Tachikawa (JP); and Nozomu Kotake, Hino (JP)
Assigned to OLYMPUS CORPORATION, Tokyo (JP)
Filed by OLYMPUS CORPORATION, Hachioji (JP)
Filed on May 18, 2021, as Appl. No. 17/323,317.
Application 17/323,317 is a continuation of application No. PCT/JP2018/043175, filed on Nov. 22, 2018.
Prior Publication US 2021/0267778 A1, Sep. 2, 2021
Int. Cl. A61F 2/88 (2006.01); A61F 2/966 (2013.01)
CPC A61F 2/885 (2013.01) [A61F 2/966 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A medical stent comprising:
a resin main body that includes a distal end and a proximal end and is formed in a tubular shape along a longitudinal axis between the distal end and the proximal end;
a flap including a fixed end fixed to a proximal end side of the main body and a free end positioned outward of an outer circumferential surface of the main body in a radial direction of the main body, the flap extending from the fixed end to the free end;
a rib that extends along the longitudinal axis and is connected to the fixed end; and
a reinforcing material made of metal that extends spirally around the longitudinal axis of the main body between the distal end and the proximal end of the main body and is embedded between an inner circumferential surface of the main body and the outer circumferential surface of the main body,
wherein:
the reinforcing material includes
a first portion that is spirally wound,
a second portion spirally wound at a pitch larger than a pitch of the first portion, and
a third portion spirally wound at a pitch larger than the pitch of the second portion, the third portion being positioned between the rib and the inner circumferential surface of the main body, and
the rib extends from the fixed end in a direction away from the second portion of the reinforcing material, and is fixed to the outer circumferential surface of the main body along an entirety of a length of the rib along the longitudinal axis.