Stent matrix
AssigneeAngiomed GmbH & Co. Medizintechnik KG
InventorSylvie Lombardi
Life of this patent
Estimating the term…
Abstract
An object of this invention is to provide a radially expandable stent (1) that holds a passageway enlarged by placing the stent (1) into a lumen. The stent (1) comprises a cylindrical frame formed by a plurality of unit structures (11, 12, . . . 16, . . . ); said unit structures (11, 12, . . . 16, . . . ) formed into a closed zig-zag configuration including an endless series of straight sections (111) and joined by bends (112), and arranged face to face into a shape of multistage; connecting members (31, 33, 35, 37 . . . ), which connect said unit structures (11, 12, . . . 16, . . . ); and a mesh (91), which is wrapped around an outside of said frame.
Claims37
An elongate stent matrix which defines a surface in a closed loop surrounding an elongate flow path, and which is capable of expansion during deployment in a bodily lumen, from a small diameter delivery configuration to a large diameter lumen wall-supporting configuration;
- the matrix exhibiting a multiplicity of cells formed from struts, each of which cells has a length dimension along said flow path, a width dimension within said closed loop perpendicular to said flow path, and a thickness perpendicular to the length and width of the cell, with a first band of said cells contiguous with a first end of said matrix, and a further band of said cells contiguous with a second end of said matrix, opposite the first end;
- the matrix further exhibiting a first ring which includes at least one extending portion;
- the matrix being characterized by,
- an imported bead fixed to said extending portion, said bead having a thickness greater than that which characterizes the struts of the matrix, and defining a female receiving portion which receives said extending portion as its co-operating male portion.
A matrix as claimed in one of the preceding claims which is a self-expanding stent matrix.
A matrix as claimed in any of the preceding claims wherein the material of the beads has an electrochemical potential which is the same or substantially the same as that at the matrix material.
A matrix as claimed in 13 wherein said layer is a polymer layer.
A matrix as claimed in any one of the preceding claims wherein each bead is fixed to the matrix by a mechanical engagement of co-operating surfaces.
A matrix as claimed in any one of the preceding claims wherein each bead is fixed to the matrix by an intervening tie-layer of adhesive.
A matrix as claimed in any one of the preceding claims wherein each bead is spherical and defines a radially-extending recess to receive the free vertex to which it is fixed.
A matrix as claimed in any one of the preceding claims wherein the cells of said first band include flaring, to place the extending portions of the cells of the first end on a closed loop which has a diameter greater than that which defines the end zone of the matrix in which the first end is located.
A stent comprising a stent matrix as claimed in any one of the preceding claims.
Dependencies are inferred from the claim text.