Controlled porosity endovascular implant
First Claim
Patent Images
1. An endoprosthesis implant comprising:
- a) a stent having an expandable frame structure;
b) a stent covering disposed on said stent, said stent covering having opposed ends, a first region of the stent covering comprising portions of the stent covering adjacent the opposed ends and a second region of the stent covering comprising a middle portion of the stent covering interposed between the first region portions;
c) the first region having a plurality of pores extending between an inner surface and a spaced apart outer surface of the stent covering defining a first porosity, and the second region having a second porosity different than said first porosity, said second porosity being defined by said second region having fewer pores than said first region; and
d) each pore in the first region having a pore diameter at the stent covering outer surface of from about 30 to about 120 micrometers.
1 Assignment
0 Petitions
Accused Products
Abstract
A covered stent for treating a stenotic region in a blood vessel. The stent covering has different porosities in different regions. In those regions, typically the ends, where tissue ingrowth and re-endothelialization are desired, the stent covering is more porous, and in those regions were it is desirable to inhibit such ingrowth, the stent covering is substantially non-porous.
632 Citations
23 Claims
-
1. An endoprosthesis implant comprising:
-
a) a stent having an expandable frame structure; b) a stent covering disposed on said stent, said stent covering having opposed ends, a first region of the stent covering comprising portions of the stent covering adjacent the opposed ends and a second region of the stent covering comprising a middle portion of the stent covering interposed between the first region portions; c) the first region having a plurality of pores extending between an inner surface and a spaced apart outer surface of the stent covering defining a first porosity, and the second region having a second porosity different than said first porosity, said second porosity being defined by said second region having fewer pores than said first region; and d) each pore in the first region having a pore diameter at the stent covering outer surface of from about 30 to about 120 micrometers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
-
-
19. An endoprosthesis implant comprising:
-
a) a stent having an expandable frame structure; b) a stent covering disposed on said stent, said stent covering including a first region having a structure adapted to promote tissue ingrowth, and a second region having a structure adapted to inhibit tissue ingrowth; c) the first region having a plurality of pores extending between an inner surface and a spaced apart outer surface of the stent covering defining a first porosity and the second region having a second porosity different than the first porosity, each pore in the first region having a pore diameter at the stent covering outer surface of from about 30 to about 120 micrometers; and d) an average distance between adjacent pores in the first region being at least about 3 times an average pore diameter of the pores in the first region. - View Dependent Claims (20, 21, 22, 23)
-
Specification