EP0815806A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Controlled porosity endovascular implant
Assignee: Cordis Corp
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Filing: 1997-06-26
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Granted: —
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Expires: 2017-06-26
Abstract
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.
Inventors
- 👤 Kenneth S. Solovay
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 02:34
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/82; A61F2/86; A61F2/90; A61F2002/072; A61F2240/00; A61F2240/001; A61F2250/00; A61F2250/0014; A61F2250/0023; A61F2250/0058; A61F2250/0067
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
78 words
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 plurality
of pores defining a first porosity, and a second region
having a second porosity different than said first porosity,
said second porosity being defined by said second region
having at least one of fewer pores than said first region,
smaller pores than said first region or no pores.
Claim 2
Dependent Claim
25 words
The endoprosthesis according to claim 1 wherein said
pores in said first region have a pore diameter of from
about 30 to about 120 micrometers.
Claim 3
Dependent Claim
17 words
The endoprosthesis according to claim 1 wherein said
second region has fewer pores than said first region.
Claim 4
Dependent Claim
17 words
The endoprosthesis according to claim 1 wherein said
second region has smaller pores than said first region.
Claim 5
Dependent Claim
13 words
The endoprosthesis according to claim 1 wherein said
second region has no pores.
Claim 6
Dependent Claim
21 words
The endoprosthesis according to claim 1 wherein said
second region is substantially impermeable to passage of
body fluids under atmospheric pressure.
Claim 7
Dependent Claim
36 words
The endoprosthesis according to claim 1 wherein said
stent covering comprises a plurality of fibers, said fibers
having an average diameter that is larger than an average
pore diameter of said pores in said first region.
Claim 8
Dependent Claim
47 words
The endoprosthesis according to claim 1 wherein said
stent covering comprises a substantially continuous
polymeric sheet having pores interspersed in at least said
first region, said pores having an average pore diameter and
being spaced apart an average distance that is greater than
said average pore diameter.
Claim 9
Dependent Claim
21 words
The endoprosthesis according to claim 8 wherein said
second region is substantially impermeable to passage of
body fluids under atmospheric pressure.
Claim 10
Dependent Claim
48 words
The endoprosthesis according to claim 1 wherein said
stent covering is substantially cylindrical and has opposed
ends, said first region comprising portions of said stent
covering adjacent said opposed ends, and said second region
comprising a middle portion of said stent covering
interposed between said first region portions.
References Cited (Backward Citations)
US5019090A
Cited
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