Other

Kawasumi Laboratories. Inc.

Terumo Kabushiki Kaisha

Ikeuchi, Takeshi

Iwata, Hiroo

Mori, Kouji

Mitsudou, Kazuaki

Kazuaki Mitsudou

Hiroo Iwata

Masatoshi Watanabe

Kouji Mori

Hiroaki Nomiyama

Yoshiharu Yoshikawa

Yousuke Moriuchi

Kazunori Murakami

Shuzou Yamashita

Takeshi Ikeuchi

Ken Ikeuchi

A stent having a generally tubular body formed of ring units formed of a plurality of cells each and expandable in the radial direction, wherein each ring unit is constituted of cells connected to one another above and below, arranged to surround the center line of the stent, the ring units are arranged in the axial direction of the stent, and are connected with connector portions, each connector portion is formed of curved portions each having an arch and a generally linear portion continued thereto, 3 to 8 cells are arranged in the axial direction per 10 mm of the length of the stent, and the ratio of the length of the cell in the axial direction and the length of the connector portion is determined such that on the basis that when the length of the cell is 100, that of the connector portionto, thereby securing flexibility and radial sustaining force.

Stent

A stent () formed into a generally or substantially tubular body and expandable radially outward from inside of the tubular body, wherein cells () are connected vertically and so arranged as to surround the central axis (C) of the stent () and thereby to form annular units (), the annular units () are extended along the axis of the stent (), adjacent annular units () are connected at least at one portion by a connecting part (), each of the cells () has at least one bent portion, and the angle of the bent portion after expansion of the tubular body until the diameter becomes 2.5 mm is larger than 30&#xb0;. The stent ensures a high flexibility and radial support force, enhances the blood vessel expandability, and suppresses the foreshortening phenomenon and the flare phenomenon.

A stent has a plurality of wavy annular members each formed of a narrow wavy element and arranged in the axial direction thereof; and a plurality of connection portions each connecting the adjacent wavy annular members to each other axially. The connection portion located in the vicinity of the axial center of the stent is weaker than other constituent parts of the stent and can be broken. That is, an inflating balloon catheter can be inserted into the stent such that the inflating balloon catheter penetrates through a side wall of the stent from its interior after the stent dilates radially. The connection portion can be broken by inflation of the balloon of the inflating balloon catheter.

Implanting stent and dilating device

Growing community of inventors

Okayama, Japan

Kazuaki Mitsudou