US5695516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Longitudinally elongating balloon expandable stent
Assignee: IsoStent Inc
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Filing: 1996-02-21
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Granted: 1997-12-09
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Expires: 2016-02-21
Abstract
Abstract The present invention is designed to overcome several disadvantages of prior art balloon expandable stents. Specifically, the Butterfly Expandable To Honeycomb (BETH) stent described herein consists of a collection of circumferential (or vertical) arc structures and diagonal struts. These arcs and struts form a butterfly shape before the stent is expanded and a hexagonal, honeycomb type of structure is created when the stent is fully expanded. Until the nominal stent diameter is reached, the deployed length of the stent is actually longer than the non-deployed length. At the nominal fully-deployed diameter, the deployed stent is exactly the same length as the non-deployed length. This characteristic provides better assurance of completely covering a dilated stenosis as compared to a stent that shortens in length when deployed as is typical of all prior art balloon expandable stents. Furthermore, because at least one quarter of the expanded stent's circumference consist of vertical arcs that are arcs of a circle, they provide the BETH stent with improved radial rigidity.
Inventors
- 👤 Robert E. Fischell
- 👤 David R. Fischell
- 👤 Tim A. Fischell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 03:57
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/90; A61F2/91; A61F2/915; A61F2002/91533; A61F2002/91541; A61F2002/9155; A61F2002/91558; A61F2002/91566; A61F2250/00; A61F2250/0058; A61F2250/0067; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00035; A61F2310/00131; A61F2310/00155
Claims Analysis
Total Claims: 21
Claim 1
Independent Claim
105 words
A cylindrical stent for placement in a vessel of a human body, the stent having a longitudinal axis and also having circumferential arcs and diagonal struts with the intersection angle between the circumferential arcs and the diagonal struts being within the range of 10 to 80 degrees when the stent is in its non-deployed state, the diagonal struts being joined by curved sections to the circumferential arcs which collectively form a closed perimeter cell, the closed perimeter cell having two parallel, circumferential arcs located at the longitudinal extremities of the closed perimeter cell and the circumferential arcs lying generally perpendicular to the stent's longitudinal axis.
Claim 2
Dependent Claim
105 words
A cylindrical stent for placement in a vessel of a human body, the stent having a longitudinal axis and also having circumferential arcs and diagonal struts with the intersection angle between the circumferential arcs and the diagonal struts being within the range of 10 to 80 degrees when the stent is in its non-deployed state, the diagonal struts being joined by curved sections to the circumferential arcs which collectively form a closed perimeter cell, the closed perimeter cell having two parallel, circumferential arcs located at the longitudinal extremities of the closed perimeter cell and the circumferential arcs lying generally perpendicular to the stent's longitudinal axis.
Claim 3
Dependent Claim
21 words
The stent of claim 1 wherein the width of the circumferential arcs is greater than the width of the diagonal struts.
Claim 4
Dependent Claim
13 words
The stent of claim 1 wherein the stent is formed from stainless steel.
Claim 5
Dependent Claim
12 words
The stent of claim 1 wherein the stent is formed from tantalum.
Claim 6
Dependent Claim
22 words
The stent of claim 1 wherein the stent is constructed of a metal that is coated with a high density, radiopaque metal.
Claim 7
Dependent Claim
10 words
The stent of claim 5 wherein the metal is gold.
Claim 8
Dependent Claim
14 words
The stent of claim 1 wherein the stent is coated with an anti-thrombogenic coating.
Claim 9
Dependent Claim
20 words
The stent of claim 1 wherein the stent includes a radioisotope material to prevent neointimal hyperplasia subsequent to balloon angioplasty.
Claim 10
Dependent Claim
72 words
A cylindrical stent for implantation into a vessel of a human body, the stent being adapted to lengthen longitudinally as its diameter increases from its non-deployed diameter, the stent structure to accomplish lengthening including a multiplicity of closed perimeter cells each cell including within its perimeter at least two diagonal struts, which diagonal struts increase their projected length in the longitudinal direction as the stent diameter is increased from its non-deployed diameter.
Claim 11
Dependent Claim
72 words
A cylindrical stent for implantation into a vessel of a human body, the stent being adapted to lengthen longitudinally as its diameter increases from its non-deployed diameter, the stent structure to accomplish lengthening including a multiplicity of closed perimeter cells each cell including within its perimeter at least two diagonal struts, which diagonal struts increase their projected length in the longitudinal direction as the stent diameter is increased from its non-deployed diameter.
Claim 12
Dependent Claim
22 words
The stent of claim 9 wherein the stent is constructed of a metal that is coated with a high density, radiopaque metal.
Claim 13
Dependent Claim
10 words
The stent of claim 10 wherein the metal is gold.
Claim 14
Dependent Claim
14 words
The stent of claim 9 wherein the stent is coated with an anti-thrombogenic coating.
Claim 15
Dependent Claim
20 words
The stent of claim 9 wherein the stent includes a radioisotope material to prevent neointimal hyperplasia subsequent to balloon angioplasty.
Claim 16
Dependent Claim
100 words
A stent in the form of a thin-walled cylinder having a longitudinal axis, the stent having a multiplicity of hexagonal cells that form a honeycomb type cylindrical structure, each side of each hexagonal cell being approximately equal in length to every other side and each hexagonal cell having a first circumferential arc located at one longitudinal extremity of the hexagonal cell and a second circumferential arc located at the opposite longitudinal extremity of the hexagonal cell, the first and second circumferential arcs being generally parallel to each other and each circumferential arc lying generally perpendicular to the stent's longitudinal axis.
Claim 17
Dependent Claim
100 words
A stent in the form of a thin-walled cylinder having a longitudinal axis, the stent having a multiplicity of hexagonal cells that form a honeycomb type cylindrical structure, each side of each hexagonal cell being approximately equal in length to every other side and each hexagonal cell having a first circumferential arc located at one longitudinal extremity of the hexagonal cell and a second circumferential arc located at the opposite longitudinal extremity of the hexagonal cell, the first and second circumferential arcs being generally parallel to each other and each circumferential arc lying generally perpendicular to the stent's longitudinal axis.
Claim 18
Dependent Claim
21 words
The stent of claim 14 wherein the width of the circumferential arcs is greater than the width of the diagonal struts.
Claim 19
Dependent Claim
20 words
The stent of claim 14 wherein the stent has curved sections that join the circumferential arcs to the diagonal struts.
Claim 20
Dependent Claim
19 words
The stent of claim 16 wherein the curved sections have a narrower width as compared to the diagonal struts.
Claim 21
Dependent Claim
20 words
The stent of claim 14 wherein the stent includes a radioisotope material to prevent neointimal hyperplasia subsequent to balloon angioplasty.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2000-12-08 | 2001-06-09 | 2001-12-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2004-12-08 | 2005-06-09 | 2005-12-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2008-12-08 | 2009-06-09 | 2009-12-09 | $7700.00 | Window Closed / Lapsed |