Synthetic resin stent and stent delivery system
AssigneeJMS Co., Ltd.
InventorsJunichi Ide, Shuji Fukutaki, Manami Nishihara
Life of this patent
Estimating the term…
Abstract
A synthetic resin stent is able to demonstrate self-extensibility, restorability, adhesion to the digestive tract, and ability to follow peristaltic movement. The synthetic resin stent is provided with: a first stent that has a first stent body formed as a cylindrical mesh from fibers made of synthetic resin, and that can be deformed from a reduced-diameter state to an expanded-diameter state; and a second stent that is formed as a cylindrical mesh which is finer than that of the first stent body, is arranged so as to cover the outer periphery of the first stent body, and can be deformed from a reduced-diameter state to an expanded-diameter state.
Claims17
A synthetic resin stent, comprising:
- a first stent including a first stent body formed of synthetic resin fiber into a tubular structure having a mesh, the first stent being deformable from a reduced diameter state to an expanded diameter state;
- and
- a second stent formed into a tubular structure having a mesh denser than the mesh of the first stent body, the second stent arranged so as to cover an outer periphery of the first stent body, and being deformable from the reduced diameter state to the expanded diameter state,
- wherein the first stent body is formed by connecting a plurality of polygonal annular portions side by side in a longitudinal direction of the first stent, in a state in which the plurality of polygonal annular portions formed of synthetic resin fiber into a polygonal annular shape as viewed in the longitudinal direction are bent or curved so as to be convex in the longitudinal direction,
- the plurality of polygonal annular portions each include a pair of bent portions that are bent so as to be convex toward one side in the longitudinal direction, and a pair of bent portions that are bent so as to be convex toward one other side in the longitudinal direction,
- the plurality of polygonal annular portions are configured by connecting the plurality of polygonal annular portions side by side in the longitudinal direction in such a manner that, in a state in which bent portions of adjacent polygonal annular portions are arranged to face each other, the bent portions of the adjacent polygonal annular portions that face each other are connected by a corresponding one of tubular connecting portions, and
- a pair of the adjacent polygonal annular portions is connected with each other such that mutual convex portions made of synthetic resin fiber of the pair of the adjacent polygonal annular portions is connected with each other with a corresponding one of the tubular connecting portions that connect the bent portions that are bent so as to be convex toward one side in the longitudinal direction and the bent portions that are bent so as to be convex toward one other side in the longitudinal direction.
Dependencies are inferred from the claim text.