EP0880948A1
Expired / Lapsed
EP
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Stent and stent-graft for treating branched vessels
Assignee: Schneider USA Inc
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Filing: 1998-05-01
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Granted: —
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Expires: 2018-05-01
Abstract
Abstract An implantable stent (10, 210) and stent-graft (410, 510, 710) for treating a patient having a relatively healthy first aorta portion upstream from a renal artery branch, and a diseased aorta portion downstream from the renal artery branch. One embodiment (210, 510, 710) of the device includes a fixation section (230, 530, 730), a renal artery branch section (232, 532, 732) and a diseased aorta section (234, 534, 734), all of which can be tubular, radially 0compressible and self-expandable structures formed from a plurality of filaments which are helically wound in a braided configuration. When the device is implanted and in its expanded state, the fixation section (230, 530, 730) engages the first aorta portion upstream from a renal artery branch to provide substantial anchoring support. The diseased aorta section (234, 534, 734) engages the portion of the aorta downstream from the renal artery branch and extends across the diseased portion of the aorta for purposes of treatment. The renal artery branch section (232, 532, 732) extends across the renal artery branch and connects the diseased aorta section to the fixation section while allowing blood flow between the aorta and renal artery branch.
Inventors
- 👤 Paul Thompson
- 👤 Claude Clerc
- 👤 Paul Chouinard
- 👤 Leonard Pinchuk
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 14:25
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2/856; A61F2002/061; A61F2002/065; A61F2002/075; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2230/00; A61F2230/0002; A61F2230/0004; A61F2230/0008
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
205 words
An implantable medical device (10, 210, 610, 710) for treating a section of a
patient's vessel having a vessel branch, a relatively healthy first vessel portion on a first side of the
vessel branch, and a diseased vessel portion on a second side of the vessel branch, including: a fixation section (30, 230, 630, 730) comprising a plurality of filaments (36, 236, 636,
736) which are helically wound in a braided configuration to form a tubular, radially
compressible and self-expandable structure, for engaging the first vessel portion on
the first side of the vessel branch when in an expanded state to provide substantial
anchoring support for the implanted medical device; a diseased section (34, 234, 634, 734) comprising a plurality of filaments (36, 236, 636,
736) which are helically wound in a braided configuration to form a tubular, radially
compressible and self-expandable structure, for engaging a portion of the vessel on
the second side of the vessel branch and extending across and treating the diseased
vessel portion; and a branch section (32, 232, 632, 732) comprising a radially compressible and expandable
structure, for extending across the vessel branch and connecting the diseased
section to the fixation section while allowing blood flow to the vessel branch.
Claim 2
Dependent Claim
45 words
The implantable medical device (10) of claim 1 wherein the branch section (32)
includes a plurality of filaments (38) which are generally parallel to one another and have opposite
ends wrapped around the filaments (36) of the fixation section (30) and the diseased section (34).
Claim 3
Dependent Claim
39 words
The implantable medical device (210, 610, 710) of claim 1 wherein the branch
section (232, 632, 732) includes filaments (236, 636, 736) which are helically wound in a braided
configuration to form a tubular, radially compressible and self-expandable structure.
Claim 4
Dependent Claim
33 words
The implantable medical device (10, 210, 610, 710) of any of claims 1-3 wherein a
radial pressure of the fixation section (30) is greater than a radial pressure of the branch section
(32).
Claim 5
Dependent Claim
39 words
The implantable medical device (10, 210, 610, 710) of any of claims 1-4 wherein
the radial pressure of the fixation section (30, 230, 630, 730) is greater than a radial pressure of the
diseased section (34, 234, 634, 734).
Claim 6
Dependent Claim
43 words
The implantable medical device (10, 210, 610, 710) of any of claims 1-5 wherein a
density of the filaments in the branch section (32, 232, 632, 732) is less than a density of the
filaments in the fixation section (30, 230, 630, 730).
Claim 7
Dependent Claim
43 words
The implantable medical device (10, 210, 610, 710) of any of claims 1-6 wherein
the density of the filaments in the branch section (32, 232, 632, 732) is less than a density of the
filaments in the diseased section (34, 234, 634, 734).
Claim 8
Dependent Claim
31 words
The implantable medical device (610) of any of claims 1-7 and further including a
radially-expandable membrane (650) coextensive with at least a length ofthe self-expandable
structure of the diseased section (634).
Claim 9
Dependent Claim
27 words
The implantable medical device (610) of claim 8 wherein the membrane (650) is
coextensive with at least 75% of a continuous length of the diseased section (634).
Claim 10
Dependent Claim
20 words
The implantable medical device (610) of any of claims 8-9 wherein the membrane
(650) is formed of braided polymeric filaments.
Claim 11
Dependent Claim
28 words
The implantable medical device (610) of claim 10 wherein the membrane (650) is
formed of filaments interbraided with one another and the filaments (636) of the self-expandable
structure.
Claim 12
Dependent Claim
184 words
An implantable medical device (10, 210, 710) for treating a portion of a patient's
vessel having a branch, a first portion on a first side ofthe branch, and a second portion on a second
side of the branch, including: a first section (30, 230, 730) having a first porosity and comprising a plurality filaments
which are helically wound in a braided configuration to form a tubular, radially
compressible and self-expandable structure, for engaging the first portion of the
vessel on the first side of the branch; a second section (34, 234, 734) having a second porosity and comprising a plurality
filaments which are helically wound in a braided configuration to form a tubular,
radially compressible and self-expandable structure, for engaging the second
portion of the vessel on the second side of the branch; and a branch section (32, 232, 732) having a third porosity which is greater than at least one of
the first and second porosities and comprising a radially compressible and
expandable structure, for extending across the branch and connecting the first and
second sections while allowing blood flow to the branch.
Claim 13
Dependent Claim
34 words
The implantable medical device (210, 710) of claim 12 wherein the filaments of the
branch section (232, 732) are helically wound in a braided configuration to form a tubular, radially
compressible and self-expandable structure.
Claim 14
Dependent Claim
39 words
The implantable medical device (10, 210, 710) of any of claims 12-13 wherein free
state diameters of the first section (30, 230, 730), second section (34, 234, 734) and branch section
(32, 232, 732) are equal to one another.
Claim 15
Dependent Claim
37 words
The implantable medical device (710) of any of claims 12-14 wherein the second
section (734) includes a radially-expandable and relatively low porosity membrane (750)
coextensive with at least a portion of the length of the self-expandable structure.
Claim 16
Dependent Claim
19 words
The implantable medical device (710) of claim 15 wherein the second section
membrane (750) is formed of braided filaments.
Claim 17
Dependent Claim
29 words
The implantable medical device (710) of claim 16 wherein the second section
membrane (750) is formed of filaments interbraided with one another and the filaments of the self-expandable
structure.
Claim 18
Dependent Claim
37 words
The implantable medical device (710) of any of claims 12-14 wherein the first
section (730) includes a radially-expandable and relatively low porosity membrane (751)
coextensive with at least a portion of the length of the self-expandable structure.
Claim 19
Dependent Claim
19 words
The implantable medical device (710) of claim 18 wherein the first section
membrane (751) is formed of braided filaments.
Claim 20
Dependent Claim
29 words
The implantable medical device (710) of claim 19 wherein the first section
membrane (751) is formed of filaments braided with one another and the filaments of the self-expandable
structure.
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