US5913896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Interwoven dual sinusoidal helix stent
Assignee: Medtronic Inc
•
Filing: 1997-07-03
•
Granted: 1999-06-22
•
Expires: 2017-07-03
Abstract
Abstract A method and apparatus for a radially expandable stent for implantation within a body vessel, comprising a first and second wire having a series of alternating peaks and valleys. The valleys of the first wire are braided with the peaks of the second wire forming a braided region with the interwoven first and second wire being wound into a continuous helix having a hollow cylindrical shape. The peaks of the first wire of the continuous helix may be welded to the adjacent valleys of the second wire of the continuous helix. The peaks and valleys of the first wire may symmetrically intersect with the peaks and valleys of the second wire to form a uniform series of crossings thereby permitting even expansion of the first and second wires. The proximal end of the first wire may be attached to the proximal end of the second wire. The distal end of the first wire may be attached to the distal end of the second wire. A means within the interwoven first and second wires of the continuous helix may be included for expansion thereof.
Inventors
- 👤 William J. Boyle
- 👤 Rosalinda A. Wong
- 👤 James M. Shy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:21
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; Y; Y10; Y10S; Y10S623/00; Y10S623/901
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
179 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that each valley of the first wire is interwoven with one respective peak of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; and the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape.
Claim 2
Dependent Claim
179 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that each valley of the first wire is interwoven with one respective peak of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; and the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape.
Claim 3
Dependent Claim
29 words
The stent according to claim 1 wherein the first and second wires are formed of a biocompatible metal that can be plastically deformed at low to moderate stress levels.
Claim 4
Dependent Claim
29 words
The stent according to claim 1 wherein the first and second wires are formed of a biocompatible clad metal having a radiopaque material covered with a higher strength material.
Claim 5
Dependent Claim
23 words
The stent according to claim 1 wherein the first and second wires are formed of MP-35N with at least 33% tantalum by volume.
Claim 6
Dependent Claim
27 words
The stent according to claim 1 wherein the first and second wires are formed of a stainless steel alloy 316 with greater than 25% tantalum by volume.
Claim 7
Dependent Claim
32 words
The stent according to claim 1 having a means within the interwoven first and second wires of the continuous helix for expanding the interwoven first and second wires of the continuous helix.
Claim 8
Dependent Claim
37 words
The stent according to claim 1 wherein at least one peak of the first or second wire of the continuous helix is welded to an adjacent valley of the first or second wire of the continuous helix.
Claim 9
Dependent Claim
29 words
The stent according to claim 1 wherein the first and second wires are formed of a biocompatible clad metal having a radiopaque material covered with a higher strength material.
Claim 10
Dependent Claim
215 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that each valley of the first wire is interwoven with one respective peak of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape; and the peaks and valleys of the first wire symmetrically intersecting with the peaks and valleys of the second wire to form a uniform series of crossings thereby permitting even expansion of the first and second wires.
Claim 11
Dependent Claim
215 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that each valley of the first wire is interwoven with one respective peak of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape; and the peaks and valleys of the first wire symmetrically intersecting with the peaks and valleys of the second wire to form a uniform series of crossings thereby permitting even expansion of the first and second wires.
Claim 12
Dependent Claim
29 words
The stent according to claim 9 wherein the first and second wires are formed of a biocompatible metal that can be plastically deformed at low to moderate stress levels.
Claim 13
Dependent Claim
29 words
The stent according to claim 9 wherein the first and second wires are formed of a biocompatible clad metal having a radiopaque material covered with a higher strength material.
Claim 14
Dependent Claim
23 words
The stent according to claim 9 wherein the first and second wires are formed of MP-35N with at least 33% tantalum by volume.
Claim 15
Dependent Claim
27 words
The stent according to claim 9 wherein the first and second wires are formed of a stainless steel alloy 316 with greater than 25% tantalum by volume.
Claim 16
Dependent Claim
16 words
The stent according to claim 9 having a means for expanding the first and second wires.
Claim 17
Dependent Claim
37 words
The stent according to claim 9 wherein at least one peak of the first or second wire of the continuous helix is welded to an adjacent peak of the first or second wire of the continuous helix.
Claim 18
Dependent Claim
29 words
The stent according to claim 9 wherein the first and second wires are formed of a biocompatible clad alloy having a radiopaque material covered with a higher strength material.
Claim 19
Dependent Claim
214 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that each valley of the first wire is interwoven with one respective peak of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape; and the proximal end of the first wire being attached to the proximal end of the second wire, and the distal end of the first wire being attached to the distal end of the second wire.
Claim 20
Dependent Claim
214 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that each valley of the first wire is interwoven with one respective peak of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape; and the proximal end of the first wire being attached to the proximal end of the second wire, and the distal end of the first wire being attached to the distal end of the second wire.
Claim 21
Independent Claim
200 words
A method for making a stent body for implantation within a body vessel comprising: preforming a first wire into a sinusoidal wave pattern having a series of peaks alternating with valleys, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; preform a second wire into a sinusoidal wave pattern having a series of peaks alternating with valleys, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; interweaving the first wire with the second wire such that each valley of the first wire is braided with one respective peak of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; and winding the interwoven first and second wires on a cylindrical mandrel into a continuous helix having a cylindrical shape such that the alternating peaks and valleys are retained.
Claim 22
Independent Claim
200 words
A method for making a stent body for implantation within a body vessel comprising: preforming a first wire into a sinusoidal wave pattern having a series of peaks alternating with valleys, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; preform a second wire into a sinusoidal wave pattern having a series of peaks alternating with valleys, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; interweaving the first wire with the second wire such that each valley of the first wire is braided with one respective peak of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; and winding the interwoven first and second wires on a cylindrical mandrel into a continuous helix having a cylindrical shape such that the alternating peaks and valleys are retained.
Claim 23
Dependent Claim
43 words
The method of claim 18 comprising a further step of attaching the proximal end of the first wire to the proximal end of the second wire; and attaching the distal end of the first wire to the distal end of the second wire.
Claim 24
Dependent Claim
56 words
The method of claim 18 comprising a further step of interweaving the first wire with the second wire such that the peaks and valleys of the first wire symmetrically intersect with the peaks and valleys of the second wire to form a uniform series of crossings thereby permitting even expansion of the first and second wires.
Claim 25
Dependent Claim
39 words
The method of claim 18 including a further step of welding at least one peak of the first or second wire of the continuous helix to an adjacent valley of the first or second wire of the continuous helix.
Claim 26
Dependent Claim
36 words
The method of claim 18 including a further step of having a means within the interwoven first and second wires of the continuous helix for expanding the interwoven first and second wires of the continuous helix.
Claim 27
Dependent Claim
49 words
The method of claim 18 including a further step of flattening the first outer diameter of one or more braids using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter.
Claim 28
Dependent Claim
192 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that at least a pair of immediately adjacent peaks of the first wire are interwoven with at least a pair of respective counterpart immediately adjacent valleys of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; and the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape.
Claim 29
Dependent Claim
192 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that at least a pair of immediately adjacent peaks of the first wire are interwoven with at least a pair of respective counterpart immediately adjacent valleys of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; and the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape.
Claim 30
Dependent Claim
228 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that at least a pair of immediately adjacent peaks of the first wire are interwoven with at least a pair of respective counterpart immediately adjacent valleys of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape; and the peaks and valleys of the first wire symmetrically intersecting with the peaks and valleys of the second wire to form a uniform series of crossings thereby permitting even expansion of the first and second wires.
Claim 31
Dependent Claim
228 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that at least a pair of immediately adjacent peaks of the first wire are interwoven with at least a pair of respective counterpart immediately adjacent valleys of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape; and the peaks and valleys of the first wire symmetrically intersecting with the peaks and valleys of the second wire to form a uniform series of crossings thereby permitting even expansion of the first and second wires.
Claim 32
Dependent Claim
227 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that at least a pair of immediately adjacent peaks of the first wire are interwoven with at least a pair of respective counterpart immediately adjacent valleys of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape; and the proximal end of the first wire being attached to the proximal end of the second wire, and the distal end of the first wire being attached to the distal end of the second wire.
Claim 33
Dependent Claim
227 words
A radially expandable stent for implantation within a body vessel, comprising: a first wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; a second wire having a preformed series of peaks alternating with valleys therein, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; the first wire being interwoven with the second wire such that at least a pair of immediately adjacent peaks of the first wire are interwoven with at least a pair of respective counterpart immediately adjacent valleys of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; the interwoven first and second wires being wound into a continuous helix having a hollow cylindrical shape; and the proximal end of the first wire being attached to the proximal end of the second wire, and the distal end of the first wire being attached to the distal end of the second wire.
Claim 34
Independent Claim
212 words
A method for making a stent body for implantation within a body vessel comprising: preforming a first wire into a sinusoidal wave pattern having a series of peaks alternating with valleys, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; preforming a second wire into a sinusoidal wave pattern having a series of peaks alternating with valleys, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; interweaving the first wire with the second wire such that at least a pair of immediately adjacent peaks of the first wire are braided with at least a pair of respective immediately adjacent valleys of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; and winding the interwoven first and second wires on a cylindrical mandrel into a continuous helix having a cylindrical shape such that the alternating peaks and valleys are retained.
Claim 35
Independent Claim
212 words
A method for making a stent body for implantation within a body vessel comprising: preforming a first wire into a sinusoidal wave pattern having a series of peaks alternating with valleys, each peak and valley being connected by a substantially straight segment, the first wire having a proximal end and a distal end; preforming a second wire into a sinusoidal wave pattern having a series of peaks alternating with valleys, each peak and valley being connected by a substantially straight segment, the second wire having a proximal end and a distal end; interweaving the first wire with the second wire such that at least a pair of immediately adjacent peaks of the first wire are braided with at least a pair of respective immediately adjacent valleys of the second wire with each interweaving forming a braid, the braid having a first outer diameter, the first outer diameter of one or more braids are flattened using a means whereby a wall thickness of the braid is reduced resulting in a second outer diameter of the braid which is less than the first outer diameter; and winding the interwoven first and second wires on a cylindrical mandrel into a continuous helix having a cylindrical shape such that the alternating peaks and valleys are retained.
References Cited (Backward Citations)
US4739762A
Cited
US4739762B1
Cited
US4649922A
Cited
US5061275A
Cited
US4969458A
Cited
US4886062A
Cited
US5133732A
Cited
US5019090A
Cited
US4856516A
Cited
US4994071A
Cited
US5104404A
Cited
US5161547A
Cited
US5116365A
Cited
US5443498A
Cited
US5507767A
Cited
US5405377A
Cited
US5282823A
Cited
US5370683A
Cited
US5354308A
Cited
US5366504A
Cited
US5382261A
Cited
WO1994012136A1
Cited
US5503636A
Cited
US5342348A
Cited
EP0645125A1
Cited
US5389106A
Cited
US5549663A
Cited
WO1995029646A1
Cited
US5613981A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-06-21 | 2002-12-21 | 2003-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-06-21 | 2006-12-21 | 2007-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-06-21 | 2010-12-21 | 2011-06-22 | $7700.00 | Window Closed / Lapsed |