US5443500A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Intravascular stent
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1994-04-08
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Granted: 1995-08-22
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Expires: 2014-04-08
Abstract
Abstract The intravascular stent intended for implantation in a stenotic area or zone of obstruction of a blood vessel consists of a flat sheet which is perforated to form a kind of a reticulated or lattice type structure with undeformable links and made of malleable material. Said sheet is temporarily rolled up and locked in a spiral with a relatively small diameter (d) on a deflated angioplasty balloon mounted on the end of a catheter and is held in said rolled-up state by a tie laced into overlapping links. Once the device is in place in the restricted area of the blood vessel to be treated and after tie is removed, the rolled sheet is expanded to a desired diameter (D) by inflating balloon and is then held in this expanded state by integrated holding flaps which, after the balloon is deflated, extend through the links and engage the edges thereof under the pressure of the vessel.
Inventors
- 👤 Ulrich Sigwart
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:39
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/92; A61F2230/00; A61F2230/0002; A61F2230/0028; A61F2230/0054
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
155 words
An elongated cylindrically shaped intravascular stent assembly, comprising: a) a rectangularly shaped sheet which is in a rolled-up state with overlapping inner and outer longitudinal sections; b) means to expand the rolled-up sheet from a first rolled-up state with a first relatively small diameter; c) means to expand the rolled-up sheet to a second rolled-up state with a second relatively large diameter by unrolling the sheet; d) outwardly projecting fingers extending from the inner overlapping longitudinal section of the sheet; and e) openings in the outer overlapping longitudinal section of the sheet which are adapted to receive the projecting fingers which extend outwardly from the inner overlapping longitudinal section thereby locking the rolled-up longitudinal section thereby locking the rolled-up sheet in the second rolled-up state, said outwardly projecting fingers engaging with a select number of said openings to permit the selective radial expansion and locking of the tubular prosthesis in at least one fixed diameter.
Claim 2
Dependent Claim
155 words
An elongated cylindrically shaped intravascular stent assembly, comprising: a) a rectangularly shaped sheet which is in a rolled-up state with overlapping inner and outer longitudinal sections; b) means to expand the rolled-up sheet from a first rolled-up state with a first relatively small diameter; c) means to expand the rolled-up sheet to a second rolled-up state with a second relatively large diameter by unrolling the sheet; d) outwardly projecting fingers extending from the inner overlapping longitudinal section of the sheet; and e) openings in the outer overlapping longitudinal section of the sheet which are adapted to receive the projecting fingers which extend outwardly from the inner overlapping longitudinal section thereby locking the rolled-up longitudinal section thereby locking the rolled-up sheet in the second rolled-up state, said outwardly projecting fingers engaging with a select number of said openings to permit the selective radial expansion and locking of the tubular prosthesis in at least one fixed diameter.
Claim 3
Dependent Claim
30 words
The stent according to claim 1 characterized by the fact that said sheet is formed of elastic material and that its expansion by unrolling is caused by its own elasticity.
Claim 4
Dependent Claim
58 words
The stent according to claim 1 characterized by the fact that the sheet is made of malleable material and that the means to expand the stent is an angioplasty balloon disposed within an interior of the stent in its first rolled-up state which is adapted to be inflated to thereby expand the stent to its second rolled-up state.
Claim 5
Dependent Claim
36 words
The stent according to claim 1 characterized by the fact that the sheet of which it consists has been equipped with holes so arranged as to give it a reticulated, lattice-like appearance with undeformable regular links.
Claim 6
Dependent Claim
33 words
The stent according to claim 4 characterized by the fact that the links forming the rolled sheet are square-shaped and two parallel sides thereof are oriented in the longitudinal direction of the stent.
Claim 7
Dependent Claim
53 words
The stent according to claim 1 characterized by the fact that means to temporarily hold the stent in the rolled-up state around a catheter consists of a wire laced through the openings of at least two layers of sheet rolled upon itself, said wire being designed to be removed from outside the stent.
Claim 8
Independent Claim
268 words
A method of delivering an expandable stent assembly to a desired location within a patient's blood vessel comprising: a) providing an elongated cylindrically shaped intravascular stent having a rectangularly shaped sheet which is in a rolled-up state with overlapping inner and outer longitudinal sections in a first rolled-up state with a relatively small diameter, outwardly projecting fingers extending from the inner overlapping longitudinal section, and openings in the outer overlapping longitudinal section which are adapted to receive the outwardly projecting fingers which extend from the inner overlapping longitudinal section to thereby lock the rolled-up sheet in a rolled-up state; b) providing an intravascular catheter having an expandable member on a distal portion thereof; c) mounting the stent in the first rolled-up state onto the expandable member; d) advancing the catheter within a patient's vascular system until the expandable member with the stent mounted thereon is located at a desirable site within a blood vessel; e) expanding the expandable member to expand the stent from the first rolled-up state to a second rolled-up state with a diameter larger than the diameter thereof in the first rolled-up state; f) constricting the expandable member to allow the fingers from the inner overlapping longitudinal section to be received by the openings provided in the outer overlapping longitudinal section to thereby lock the stent in the second rolled-up state, said outwardly projecting fingers engaging with a select number of said openings to permit the selective radial expansion and locking of the tubular prosthesis in at least one fixed diameter; and g) removing the catheter and expandable member thereon from a patient's vascular system.
Claim 9
Independent Claim
268 words
A method of delivering an expandable stent assembly to a desired location within a patient's blood vessel comprising: a) providing an elongated cylindrically shaped intravascular stent having a rectangularly shaped sheet which is in a rolled-up state with overlapping inner and outer longitudinal sections in a first rolled-up state with a relatively small diameter, outwardly projecting fingers extending from the inner overlapping longitudinal section, and openings in the outer overlapping longitudinal section which are adapted to receive the outwardly projecting fingers which extend from the inner overlapping longitudinal section to thereby lock the rolled-up sheet in a rolled-up state; b) providing an intravascular catheter having an expandable member on a distal portion thereof; c) mounting the stent in the first rolled-up state onto the expandable member; d) advancing the catheter within a patient's vascular system until the expandable member with the stent mounted thereon is located at a desirable site within a blood vessel; e) expanding the expandable member to expand the stent from the first rolled-up state to a second rolled-up state with a diameter larger than the diameter thereof in the first rolled-up state; f) constricting the expandable member to allow the fingers from the inner overlapping longitudinal section to be received by the openings provided in the outer overlapping longitudinal section to thereby lock the stent in the second rolled-up state, said outwardly projecting fingers engaging with a select number of said openings to permit the selective radial expansion and locking of the tubular prosthesis in at least one fixed diameter; and g) removing the catheter and expandable member thereon from a patient's vascular system.
Claim 10
Dependent Claim
13 words
The method of claim 6 wherein the expandable member is an angioplasty balloon.
Claim 11
Dependent Claim
106 words
An elongated cylindrically shaped stent, comprising: a) a rectangularly shaped sheet which is in a rolled-up state with overlapping inner and outer longitudinal sections; b) outwardly projecting fingers extending from the inner overlapping longitudinal section of the sheet; and c) openings in the outer overlapping longitudinal section of the sheet which are adapted to receive the projecting fingers extending outwardly from the inner overlapping longitudinal section which facilitate locking the rolled-up sheet in a rolled-up state, said outwardly projecting fingers engaging with a select number of said openings to permit the selective radial expansion and locking of the tubular prosthesis in at least one fixed diameter.
Claim 12
Dependent Claim
106 words
An elongated cylindrically shaped stent, comprising: a) a rectangularly shaped sheet which is in a rolled-up state with overlapping inner and outer longitudinal sections; b) outwardly projecting fingers extending from the inner overlapping longitudinal section of the sheet; and c) openings in the outer overlapping longitudinal section of the sheet which are adapted to receive the projecting fingers extending outwardly from the inner overlapping longitudinal section which facilitate locking the rolled-up sheet in a rolled-up state, said outwardly projecting fingers engaging with a select number of said openings to permit the selective radial expansion and locking of the tubular prosthesis in at least one fixed diameter.
Claim 13
Dependent Claim
12 words
The stent of claim 9 wherein the sheet has a lattice-like structure.
Claim 14
Dependent Claim
28 words
The stent of claim 9 wherein the inner overlapping longitudinal section has a longitudinal edge with a plurality of fingers positioned along said edge which projects outwardly therefrom.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-08-21 | 1999-02-20 | 1999-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-08-21 | 2003-02-20 | 2003-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-08-21 | 2007-02-20 | 2007-08-22 | $7700.00 | Window Closed / Lapsed |