Patent EP0876805A2 successfully refreshed from Google Patents.
EP0876805A2
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EP
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Intravascular stent and stent delivery system for ostial vessel obstructions
Assignee: Cordis Corp
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Filing: 1998-05-06
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Granted: —
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Expires: 2018-05-06
Abstract
Abstract Disclosed is a stent and stent delivery system specifically designed for implantation of a stent at the ostium of a vessel. Such a system is specifically designed to be able to create and maintain patency of lesions such as renal artery ostial stenoses or bypass graft ostial stenoses. The stent portion of this system has an increased distal flexibility before expansion and an increased proximal radial rigidity after expansion. In addition, this stent may also have its most proximal struts able to be flared out so as not to "hang out" into a major artery such as the aorta. This stent can be combined with a specially designed stent delivery catheter which has a balloon with a tapered shape to allow increased expansion of the proximal section of the stent. This balloon can also produce flaring out of the most proximal stent struts.
Inventors
- 👤 Todd H. Turnland
- 👤 David R. Fischell
- 👤 Tim A. Fischell
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-29 08:58
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61F2002/821; A61F2002/91533; A61F2002/91541; A61F2002/9155; A61F2002/91558; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0013
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
114 words
A stent delivery catheter system for placing a stent within a vessel of a
human body, the system comprising: (a) a flexible guide wire extending in a longitudinal direction; (b) a stent delivery catheter having a distal section and a proximal section,
said stent delivery catheter having a longitudinally directed central lumen for slideable
insertion therethrough of said flexible guidewire, said distal section of said stent delivery
catheter including a deployable stent mounted on an expandable balloon having a distal
section and a proximal section, said proximal section of said balloon adapted to be expanded
to a larger diameter than the diameter of said distal section of said balloon upon inflation of
said balloon.
Claim 2
Dependent Claim
23 words
The stent delivery catheter system as recited in claim 1 where said proximal
section of said balloon is formed of a non-compliant material.
Claim 3
Dependent Claim
22 words
The stent delivery catheter system as recited in claim 1 where said proximal
section of said balloon is formed of compliant material.
Claim 4
Dependent Claim
46 words
The stent delivery catheter system as recited in claim 1 where the proximal end of
said balloon proximal section includes a bulged section having a larger diameter than said
after expansion of said balloon as compared with the remainder of said proximal section of
said balloon.
Claim 5
Dependent Claim
65 words
A stent for maintaining the patency of a vessel of the human body comprising a
multiplicity of sets of strut members, adjacent sets of strut members coupled each to the
other in a longitudinal extension forming a one piece stent construction, said stent having a
proximal section and a distal section, said proximal section having a greater radial rigidity
following deployment than said distal section.
Claim 6
Dependent Claim
30 words
The stent as recited in claim 5 where said proximal section of said stent has a
greater number of sets of strut members per unit length than the distal section.
Claim 7
Dependent Claim
42 words
The stent as recited in claim 5 where said sets of strut members of said proximal
section have an average dimensional wall thickness greater than an average dimensional
wall thickness of said of sets of strut members of said distal section stent.
Claim 8
Dependent Claim
43 words
The stent as recited in claim 5 where said sets of strut members of said proximal
section have an average dimensional strut width greater than an average dimensional strut
width of said sets of strut members of said distal section of said stent.
Claim 9
Dependent Claim
29 words
The stent recited in claim 5 including a plurality of substantially linearly directed
"H" cross bars connecting adjacent sets of strut members in said proximal section of said
stent.
Claim 10
Dependent Claim
26 words
The stent as recited in claim 5 where said stent is radially expanded responsive to
inflation of a balloon onto which balloon the stent is mounted.
Claim 11
Dependent Claim
15 words
The stent as recited in claim 5 where said stent is a radially self-expanding
stent.
Claim 12
Dependent Claim
25 words
The stent of claim 5 including at least one radiopaque marker formed on a
proximal strut member of the most proximal set of strut members.
Claim 13
Dependent Claim
80 words
A stent for maintaining the patency of a vessel of the human body comprising a
multiplicity of sets of strut members, adjacent sets of strut members coupled each to the
other in a longitudinal extension forming a one piece stent construction, said stent having a
proximal section and a distal section, said distal section of said stent having a greater
longitudinal flexibility prior to deployment when taken with respect to the longitudinal
flexibility of said proximal section of said stent.
Claim 14
Dependent Claim
33 words
The stent as recited by claim 13 where at least two adjacent located sets of said
strut members are coupled each to the other by at least two substantially longitudinally
extending undulating members.
Claim 15
Dependent Claim
20 words
The stent as recited by claim 14 where the substantially longitudinally extending
undulating members are formed in an S-shaped contour.
Claim 16
Dependent Claim
20 words
The stent as recited by claim 14 where the substantially longitudinally extending
undulating members are formed in a U-shaped contour.
Claim 17
Dependent Claim
25 words
The stent of claim 13 including at least one radiopaque marker formed on a
proximal strut member of the most proximal set of strut members.
Claim 18
Dependent Claim
26 words
The stent as recited in claim 13 where said stent is radially expanded responsive
to inflation of a balloon onto which balloon the stent is mounted.
Claim 19
Dependent Claim
15 words
The stent as recited in claim 13 where said stent is a radially self-expanding stent.
Claim 20
Dependent Claim
42 words
The stent as recited in claim 13 where said sets of strut members of said distal
section have an average dimensional wall thickness smaller than an average dimensional
wall thickness of said of sets of strut members of said proximal section stent.
Claim 21
Dependent Claim
43 words
The stent as recited in claim 13 where said sets of strut members of said distal
section have an average dimensional strut width less than the average dimensional strut
width of said sets of strut members of said proximal section of said stent.
Claim 22
Dependent Claim
184 words
A stent delivery catheter system for placing a stent within a vessel of a
human body, the system comprising: (a) a flexible guide wire extending in a longitudinal direction; (b) a stent delivery catheter having a distal section and a proximal section,
said stent delivery catheter having a longitudinally directed central lumen for slideable
insertion therethrough of said flexible guidewire, said distal section of said stent delivery
catheter including a deployable stent mounted on an expandable balloon having a distal
section and a proximal section, said proximal section of said balloon adapted to be expanded
to a larger diameter than the diameter of said distal section of said balloon upon inflation of
said balloon; (c) a deployed stent for maintaining the patency of a vessel of the human
body comprising a multiplicity of sets of strut members, adjacent sets of strut members
coupled each to the other in a longitudinal extension forming a one piece stent construction,
said deployed stent having a proximal section and a distal section, said proximal section
having a greater radial rigidity than said distal section of said deployed stent.
Claim 23
Dependent Claim
32 words
The stent delivery system as recited in claim 22 where said proximal section of
said stent has a greater number of sets of strut members per unit length than the distal
section.
Claim 24
Dependent Claim
195 words
A stent delivery catheter system for placing a stent within a vessel of a
human body, the system comprising: (a) a flexible guide wire extending in a longitudinal direction; (b) a stent delivery catheter having a distal section and a proximal section,
said stent delivery catheter having a longitudinally directed central lumen for slideable
insertion therethrough of said flexible guidewire, said distal section of said stent delivery
catheter including a deployable stent mounted on an expandable balloon having a distal
section and a proximal section, said proximal section of said balloon adapted to be expanded
to a larger diameter than the diameter of said distal section of said balloon upon inflation of
said balloon; (c) a non-deployed stent for maintaining the patency of a vessel of the human
body comprising a multiplicity of sets of strut members, adjacent sets of strut members
coupled each to the other in a longitudinal extension forming a one piece stent construction,
said stent having a proximal section and a distal section, said distal section of said non-deployed
stent having a greater longitudinal flexibility when taken with respect to the
longitudinal flexibility of said proximal section of said non-deployed stent.
Claim 25
Dependent Claim
38 words
The stent delivery catheter system as recited by claim 24 where the stent has at
least two adjacent located sets of said strut members coupled each to the other by at least
two substantially longitudinally extending undulating members.
Claim 26
Dependent Claim
24 words
The stent delivery catheter system as recited by claim 24 where the stent's
substantially longitudinally extending undulating members are formed in an S-shaped
contour.
Claim 27
Dependent Claim
24 words
The stent delivery catheter system as recited by claim 24 where the stent's
substantially longitudinally extending undulating members are formed in an U-shaped
contour.
References Cited (Backward Citations)
EP0830853A1
Cited
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