EP0554082A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Expandable stent
Assignee: Abbott Cardiovascular Systems Inc
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Filing: 1993-01-28
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Granted: —
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Expires: 2013-01-28
Abstract
Abstract An expandable, balloon-catheter-delivered intra-vascular stent (10), especially adapted for cardiovascular applications, having a plurality of protrusions (15) on its outer surface for engaging the artery walls in which it is disposed. The protrusions are formed from the body of the stent in a unitary, one-piece manner. Apertures (20) are formed in the stent body from the space vacated in the body by the material forming the protrusions. When the stent is expanded by the balloon catheter, the protrusions engage both the apertures and the artery walls, to lock the stent into the expanded diameter. In this way axial displacement and radial collapse of the stent is avoided. The protrusions are arranged in a plurality of shapes, sizes and patterns. The stent may be made of a bioabsorbable material and/or a therapeutic drug delivery material.
Inventors
- 👤 Michael S. Williams
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-23 00:58
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/92; A61L; A61L29/00; A61L29/02; A61L29/04; A61L29/06; A61B; A61B17/00; A61B2017/00004; A61B90/00; A61B90/39; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2210/00; A61F2210/0004; A61F2210/0014; A61F2210/0019; A61F2250/00; A61F2250/0058; A61F2250/0067; A61F2250/0096; A61F2250/0098; A61F2310/00; A61F2310/00005; A61F2310/00011; A61F2310/00017; A61F2310/00023; A61F2310/00035; A61F2310/00131; A61F2310/00149; A61F2310/00155; Y; Y10; Y10S; Y10S623/00; Y10S623/902; Y10S623/903
Claims Analysis
Total Claims: 26
Claim 1
Independent Claim
55 words
An expandable intraluminal stent implantable in a vessel, comprising: a body portion; a plurality of protrusions, said protrusions projecting from said body portion; a plurality of apertures in said body portion; wherein several of said protrusions engage said apertures and several of said protrusions engage said vessel, to retain said intraluminal stent in said vessel.
Claim 2
Dependent Claim
30 words
The intraluminal stent of claim 1, wherein: said body portion has an exterior surface adjacent to said vessel, and said protrusions project from said exterior surface of said body portion.
Claim 3
Dependent Claim
35 words
The intraluminal stent of claim 1 or claim 2, wherein said protrusions are unitary with said body portion and have a substantially "V" shape, and said apertures are in substantially the shape of said protrusions.
Claim 4
Dependent Claim
30 words
The intraluminal stent of claim 3, wherein said protrusions have substantially equal sides that form an apex, with said sides spaced by an angle of about 90° at said apex.
Claim 5
Dependent Claim
27 words
The intraluminal stent of any preceding claim, wherein said protrusions are spaced at about 0.0189 inches to one another, and said sides are about 0.014 inches long.
Claim 6
Dependent Claim
33 words
The intraluminal stent of any preceding claim, wherein said stent is formed of a plastic selected from the group consisting of a polymer and associated copolymer selected from the linear aliphatic polyester family.
Claim 7
Dependent Claim
25 words
The intraluminal stent of any preceding claim, wherein said protrusions are spaced from one another in a substantially uniform manner, to form rows of protrusions.
Claim 8
Dependent Claim
21 words
The expandable intraluminal stent of any of claims 1 to 6, wherein said protrusions are randomly dispersed throughout said body portion.
Claim 9
Dependent Claim
19 words
The intraluminal stent of any preceding claim, wherein said body portion is made of material formed into a cylinder.
Claim 10
Dependent Claim
27 words
The intraluminal stent of claim 9, wherein said material is a polymer selected from the group consisting of polylactic acid, polyglycolic acid, polycaprolactone, and their associated copolymers.
Claim 11
Dependent Claim
11 words
The intraluminal stent of claim 9, wherein said material is bioabsorbable.
Claim 12
Dependent Claim
51 words
An intraluminal stent implantable in a body lumen, comprising: a sheet of material; said sheet curled into a cylinder having overlapping ends; a plurality of protuberances on said sheet; whereby said cylinder is expanded from a first diameter to a second, enlarged diameter so that said protuberances engage said body lumen.
Claim 13
Dependent Claim
29 words
The intraluminal stent of claim 12, wherein: said cylinder has an outer portion, said outer portion being adjacent to said lumen, and said protuberances extend from said outer portion.
Claim 14
Dependent Claim
22 words
The intraluminal stent of claim 12 or claim 13, wherein: said protuberances are substantially "V" shaped, and are unitary with said sheet.
Claim 15
Dependent Claim
31 words
The intraluminal stent of claim 13 or of claim 14 when dependant on claim 13, wherein said protuberances are dispersed around said outer portion of said cylinder in a random pattern.
Claim 16
Dependent Claim
39 words
The intraluminal stent of any of claims 12 to 15, wherein said material is biocompatible and selected from the group consisting of the linear aliphatic polyester family, polyorthoester, polyanhydride, polydioxanone, polyhydroxybutyrate, stainless steel, nickel-titanium, platinum, Nitinol™, tantalum and gold.
Claim 17
Dependent Claim
113 words
An expandable intraluminal stent implantable in a body lumen, adapted to expand from a reduced diameter form to an expanded diameter form, comprising: a sheet of material curled into a cylinder having overlapping edges, an inner surface, and an exterior surface; said exterior surface contiguous with said lumen, and said overlapping edges allowing contact between said exterior surface and said interior surface; said outer surface having a surface texture made of a plurality of protrusions; wherein said stent is held in said expanded diameter form to engage said lumen by combining said surface texture of said exterior surface engaging said inner surface and said surface texture of said exterior surface engaging said lumen.
Claim 18
Dependent Claim
21 words
The intraluminal stent of claim 17, wherein said inner surface contains a plurality of apertures, and said protrusions engage said apertures.
Claim 19
Dependent Claim
14 words
The intraluminal stent of claim 17 or claim 18, wherein said material is biodegradable.
Claim 20
Dependent Claim
28 words
The intraluminal stent of claim 19, wherein said material is a polymer selected from the group consisting of poly(lactic acid), poly(glycolic acid), polycaprolactone, polyorthoester, polyanhydride, polydioxanone and polyhydroxybutyrate.
Claim 21
Dependent Claim
30 words
The intraluminal stent of claim 17 or claim 18, wherein said material is a biocompatible material selected from the group consisting of stainless steel, nickel-titanium, platinum, Nitinol™, tantalum and gold.
Claim 22
Dependent Claim
14 words
The intraluminal stent of any preceding claim, wherein said material contains a therapeutic agent.
Claim 23
Dependent Claim
39 words
The intraluminal stent of any preceding claim, wherein said cylinder has a longitudinal axis and a two ends spaced along said longitudinal axis, and said ends are beveled to allow said stent to be more flexible at said ends.
Claim 24
Dependent Claim
12 words
The intraluminal stent of any preceding claim, wherein said material is radiopaque.
Claim 25
Independent Claim
103 words
A method of securing an intravascular stent in a patient's vasculature, comprising: placing an intravascular stent over a balloon catheter, said stent having a plurality of protrusions projecting from said stent; positioning said intravascular stent in a patient's vasculature with said balloon catheter; expanding said balloon catheter to expand said stent from a reduced diameter form to an enlarged diameter form; securing said stent to remain in place in said patient's vasculature when said stent is in said enlarged diameter form, said securement occurring through the combined action of said protrusions engaging said stent as well as said protrusions engaging said patient's vasculature.
Claim 26
Dependent Claim
40 words
The method of securing an intravascular stent according to claim 25, wherein said stent further comprises a plurality of apertures and said stent is secured by said protrusions engaging said apertures when said stent is in said enlarged diameter form.
References Cited (Backward Citations)
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