EP0876803A2
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EP
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TMR stent and delivery system
Assignee: CR Bard Inc
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Filing: 1998-05-06
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Granted: —
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Expires: 2018-05-06
Abstract
Abstract A device and method for revascularizing myocardial tissue of the heart using stents are provided. Multiple stents are implanted into an area of hibernating myocardial tissue to permit blood to flow from the left ventricle directly into the tissue for revascularization. Various stent embodiments are disclosed that simultaneously pierce and penetrate the tissue during delivery and that are configured to resist migration out of the tissue once implanted. Alternatively, the stents may be inserted into myocardial tissue over a piercing delivery device. The stents are preferably delivered through a steerable catheter percutaneously insertable into the left ventricle and configured to hold multiple stents. The stents are pushed from the catheter directly into the myocardium sequentially.
Inventors
- 👤 designation of the inventor has not yet been filed The
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 18:28
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/94; A61B; A61B17/00; A61B17/34; A61B17/3468; A61F2/02; A61F2/24; A61F2/2493; A61B17/00234; A61B2017/00238; A61B2017/00243; A61B2017/00247; A61B2017/00349; A61B18/00; A61B2018/00315; A61B2018/00345; A61B2018/00351; A61B2018/00392; A61F2/848; A61F2002/826; A61F2220/00; A61F2220/0008; A61F2220/0016; A61F2220/0025; A61F2220/0058
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
3 words
A self-piercing stent.
Claim 2
Dependent Claim
25 words
A stent as defined in claim 1 wherein the stent comprises a body
having a proximal end and a distal end configured to pierce tissue.
Claim 3
Dependent Claim
14 words
A stent as defined in claim 2 wherein the body has a tubular
shape.
Claim 4
Dependent Claim
15 words
A stent as defined in claim 2 wherein the body comprises a
helically wrapped ribbon.
Claim 5
Dependent Claim
26 words
A stent as defined in claim 2 wherein the body is configured to
be inserted into tissue as the tissue is pierced by the distal end.
Claim 6
Dependent Claim
26 words
A stent as defined in claim 2 wherein the body further comprises
tissue engaging projections that engage tissue to resist migration of
the stent after implantation.
Claim 7
Dependent Claim
15 words
A stent as defined in claim 5 further comprising a flange at the
proximal end.
Claim 8
Dependent Claim
14 words
A stent as defined in claim 2 wherein the body defines a hollow
interior.
Claim 9
Dependent Claim
16 words
A stent as defined in claim 8 wherein the body has a plurality of
perfusion openings.
Claim 10
Dependent Claim
20 words
The stent as defined in claim 9 wherein a perfusion opening is
located at the distal end of the stent.
Claim 11
Dependent Claim
12 words
The stent as defined in claim 1 formed of a molded polymer.
Claim 12
Dependent Claim
51 words
A revascularization device comprising: a self-piercing stent having a body, a distal end configured to
penetrate into tissue and a proximal end defining an opening into the
body of the stent such that, when placed in fluid communication with a
blood pathway, blood can flow into the body of the stent.
Claim 13
Dependent Claim
14 words
A stent as defined in claim 12 wherein the body comprises a
molded plastic.
Claim 14
Dependent Claim
14 words
A stent as defined in claim 12 wherein the body has a tubular
shape.
Claim 15
Dependent Claim
15 words
A stent as defined in claim 12 wherein the body comprises a
helically wrapped ribbon.
Claim 16
Dependent Claim
25 words
A stent as defined in claim 12 wherein the body is configured to
be inserted into tissue as it is pierced by the distal end.
Claim 17
Dependent Claim
23 words
A stent as defined in claim 12 wherein the body further comprises
tissue engaging projections to resist migration of the stent after
implantation.
Claim 18
Dependent Claim
61 words
A nestable stent comprising: a body defining an interior; a proximal end defining an opening to the interior and a distal end sized smaller than the proximal end so that when
aligned with the proximal end of another nestable stent, the distal end
can fit into the proximal end and at least partially into the interior
of the other nestable stent.
Claim 19
Dependent Claim
15 words
A nestable stent as defined in claim 18 wherein the body
comprises a molded plastic.
Claim 20
Dependent Claim
15 words
A nestable stent as defined in claim 18 wherein the body has a
tubular shape.
Claim 21
Dependent Claim
16 words
A nestable stent as defined in claim 18 wherein the body
comprises a helically wrapped ribbon.
Claim 22
Dependent Claim
26 words
A nestable stent as defined in claim 18 wherein the body is
configured to be inserted into tissue as it is pierced by the distal
end.
Claim 23
Dependent Claim
26 words
A nestable stent as defined in claim 18 wherein the body further
comprises tissue engaging projections to resist migration of the stent
after implantation into tissue.
Claim 24
Dependent Claim
38 words
A nestable stent as defined in claim 18 wherein the body is
configured to permit blood to flow into the proximal end of the stent
into the interior of the stent and then radially outward from the stent.
Claim 25
Dependent Claim
106 words
A stent delivery system comprising: a delivery catheter having a proximal end, a distal end and at
least one lumen defined between the ends; at least one nestable stent having a body defining a interior, a
proximal end defining an opening into the interior, and a distal end
sized to fit within the proximal end and partially into the interior of
another nestable stent, the nestable stent being sized to fit within the
lumen of the catheter; a restraint mechanism adjacent the distal end of the catheter to
prevent release of a nestable stent from the catheter in the absence of
an intentionally applied delivery force.
Claim 26
Dependent Claim
69 words
A stent delivery system as defined in claim 25 wherein a
plurality of nestable stents are arranged within the lumen of the
catheter adjacent its distal end, substantially aligned along a common
longitudinal axis to define a series having a most proximal and a most
distal stent such that the distal end of each stent resides within the
opening at the proximal end of the next distally adjacent stent.
Claim 27
Dependent Claim
26 words
A stent delivery system as defined in claim 25 wherein the
catheter is percutaneously insertable into the left ventricle of the
heart through a patient's vessels.
Claim 28
Dependent Claim
32 words
A TMR stent comprising: a body defined by a helically wrapped ribbon having a proximal
end and a distal end wherein the distal end has a smaller diameter than
the proximal end.
Claim 29
Dependent Claim
16 words
A TMR stent as defined in claim 28 wherein the body of the stent
is flexible.
Claim 30
Dependent Claim
37 words
A TMR stent as defined in claim 28 wherein the ribbon is canted
so that the ribbon presents an outwardly facing edge that engages tissue
into which the stent is inserted to resist migration of the stent.
Claim 31
Dependent Claim
16 words
A TMR stent as defined in claim 30 wherein the ribbon has a
rectangular cross-sectional shape.
Claim 32
Dependent Claim
22 words
A TMR stent as defined in claim 30 wherein the ribbon is wrapped
to have a smaller diameter at the proximal end.
Claim 33
Dependent Claim
14 words
A TMR stent as defined in claim 28 wherein the ribbon comprises
stainless steel.
Claim 34
Independent Claim
38 words
A system for revascularizing myocardial tissue comprising: a catheter; at least one stent; a stent delivery device configured to move the stent through the
catheter and simultaneously pierce and insert the stent into myocardial
tissue to be revascularized.
Claim 35
Independent Claim
95 words
A system for reaching multiple points within a body comprising: a catheter having proximal and distal ends and a first lumen
extending from the proximal to the distal end, having a central
longitudinal axis, and a second lumen offset from the first lumen and
terminating prior to the distal end of the catheter and a pull wire
joined to the distal end of the catheter and extending to the proximal
end arranged to cause bending movement of the distal end of the
catheter; and a piercing guidewire slidable in the second lumen of the
catheter.
References Cited (Backward Citations)
No citation records indexed.
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