US6613077B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Stent with controlled expansion
Assignee: Boston Scientific Scimed Inc
•
Filing: 2001-03-27
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Granted: 2003-09-02
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Expires: 2021-03-27
Abstract
Abstract An intraluminal prosthesis composed of a self-expandable stent and a biodegradable constraining element being capable of biodegrading in vivo over a predetermined period of time to permit radial expansion of the stent. The constraining elements are applied to the stent to produce a compressed configuration. Dissolution of the constraining elements in vivo allows for expansion of the stent to an expanded configuration.
Inventors
- 👤 Sean Gilligan
- 👤 Barry O'Brien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 10:52
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/86; A61F2/02; A61F2/04; A61F2/06; A61F2/07; A61F2002/075; A61F2230/00; A61F2230/0063; A61F2230/0073; A61F2230/0078; Y; Y10; Y10S; Y10S623/00; Y10S623/902; Y10S623/903
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
129 words
An intraluminal prosthesis comprising: a. an intraluminal stent comprising opposing end portions and a medial portion therebetween, said stent being radially self-expandable between a compressed diameter and a fully-expanded diameter; and b. a biodegradable constraining element applied to said stent so as to prevent radial expansion of said medial portion of said stent to said fully-expanded diameter, thereby limiting radial expansion of said medial portion of said stent to a diameter intermediate of said compressed and fully expanded diameters said biodegradable constraining element biodegrading in vivo over a period of time to permit radial expansion of said portion of said stent to said fully-expanded diameter; wherein said opposing end portions are not constrained and therefore are permitted to expand to the fully-expanded diameter, contacting a vessel wall upon implantation.
Claim 2
Dependent Claim
129 words
An intraluminal prosthesis comprising: a. an intraluminal stent comprising opposing end portions and a medial portion therebetween, said stent being radially self-expandable between a compressed diameter and a fully-expanded diameter; and b. a biodegradable constraining element applied to said stent so as to prevent radial expansion of said medial portion of said stent to said fully-expanded diameter, thereby limiting radial expansion of said medial portion of said stent to a diameter intermediate of said compressed and fully expanded diameters said biodegradable constraining element biodegrading in vivo over a period of time to permit radial expansion of said portion of said stent to said fully-expanded diameter; wherein said opposing end portions are not constrained and therefore are permitted to expand to the fully-expanded diameter, contacting a vessel wall upon implantation.
Claim 3
Dependent Claim
26 words
An intraluminal prosthesis as in claim 1 , wherein said biodegradable constraining element comprises a biodegradable suture helically wrapped about said selected portion of said stent.
Claim 4
Dependent Claim
31 words
An intraluminal prosthesis as in claim 1 , wherein said biodegradable constraining element comprises a plurality of biodegradable sutures circumferentially wrapped about said selected portion of said stent at axially-spaced positions.
Claim 5
Dependent Claim
26 words
An intraluminal prosthesis as in claim 1 , wherein said stent comprises an undulating member helically wound along a longitudinal axis, forming a series of waves.
Claim 6
Dependent Claim
25 words
An intraluminal prosthesis as in claim 4 , wherein said biodegradable constraining element is intertwined between said waves at said selected portion of said stent.
Claim 7
Dependent Claim
82 words
An intraluminal prosthesis as in claim 1 , wherein said biodegradable constraining element is constructed of a material selected from the group consisting of poly(glycolic acid) (PGA), poly(lactic acid)(PLA), polydioxanones, polyoxalates, poly(α-esters), polyanhydrides, polyacetates, polycaprolactones, poly(orthoesters), stereopolymers of L- and D-lactic acid, copolymers of bis(p-carboxyphenoxy) propane acid and sebacic acid, sebacic acid copolymers of α-amino acids, copolymers of α-amino acids and caproic acid, copolymers of α-benzyl glutamate and polyethylene glycol, copolymers of succinate and poly(glycols), polyphosphazene, polyhydroxy-alkanoates and combinations and copolymers thereof.
Claim 8
Dependent Claim
18 words
An intraluminal prosthesis as in claim 1 , wherein said biodegradable constraining element further comprises a therapeutic agent.
Claim 9
Dependent Claim
36 words
An intraluminal prosthesis as in claim 1 , wherein said stent is constructed of a material selected from the group consisting of stainless steel, titanium, platinum, gold, nickel/titanium alloys, nitinol, bio-compatible metals, and inert thermoplastic materials.
Claim 10
Dependent Claim
18 words
An intraluminal prosthesis as in claim 1 , further including a tubular graft coaxially coupled to said stent.
Claim 11
Dependent Claim
22 words
An intraluminal prosthesis as in claim 9 , wherein said tubular graft is coaxially placed on an interior surface of said stent.
Claim 12
Dependent Claim
22 words
An intraluminal prosthesis as in claim 9 , wherein said tubular graft is coaxially place on an exterior surface of said stent.
Claim 13
Dependent Claim
22 words
An intraluminal prosthesis as in claim 1 , wherein said stent comprises a series of connected elongate strut portions having openings therebetween.
Claim 14
Dependent Claim
16 words
An intraluminal prosthesis as in claim 1 , wherein said stent self-expands by a spring-like bias.
Claim 15
Dependent Claim
16 words
An intraluminal prosthesis as in claim 1 , wherein said stent self-expands by shape memory properties.
Claim 16
Dependent Claim
14 words
An intraluminal prosthesis as in claim 1 , wherein said stent has superelastic properties.
Claim 17
Independent Claim
115 words
A method of implanting an intraluminal prosthesis within a vessel comprising: a. providing, in a compressed first diameter, a radially self-expanding stent having opposed end portions and a medial portion therebetween, said medial portion of said stent being held in said compressed first diameter by a biodegradable constraining element; b. delivering said stent within a vessel to an area of implantation; c. permitting an unconstrained portion of said stent comprising said opposed end portions to radially expand to a second diameter; and thereby engage a vessel wall; and d. permitting in vivo biodegradation of said biodegradable constraining elements to permit said portion of said stent being held in said first compressed diameter to radially expand.
Claim 18
Independent Claim
115 words
A method of implanting an intraluminal prosthesis within a vessel comprising: a. providing, in a compressed first diameter, a radially self-expanding stent having opposed end portions and a medial portion therebetween, said medial portion of said stent being held in said compressed first diameter by a biodegradable constraining element; b. delivering said stent within a vessel to an area of implantation; c. permitting an unconstrained portion of said stent comprising said opposed end portions to radially expand to a second diameter; and thereby engage a vessel wall; and d. permitting in vivo biodegradation of said biodegradable constraining elements to permit said portion of said stent being held in said first compressed diameter to radially expand.
Claim 19
Independent Claim
57 words
A method of making an intraluminal prosthesis comprising the steps of: a providing a radially self-expanding tubular stent defining a lumen therein comprising first and second ends and a medial portion therebetween; b. placing a biodegradable constraining element on said stent to constrain said medial portion of said stent from diametrically changing to a radially expanded state.
Claim 20
Independent Claim
57 words
A method of making an intraluminal prosthesis comprising the steps of: a providing a radially self-expanding tubular stent defining a lumen therein comprising first and second ends and a medial portion therebetween; b. placing a biodegradable constraining element on said stent to constrain said medial portion of said stent from diametrically changing to a radially expanded state.
Claim 21
Dependent Claim
24 words
An intraluminal prosthesis as in claim 17 , wherein said constraining element is wrapped about the length of said stent in a helical fashion.
Claim 22
Dependent Claim
21 words
An intraluminal prosthesis as in claim 17 , wherein said constraining element is wrapped circumferentially about a portion of said stent.
Claim 23
Dependent Claim
20 words
An intraluminal prosthesis as in claim 17 , wherein multiple constraining elements are placed along the length of said stent.
Claim 24
Dependent Claim
27 words
An intraluminal prosthesis as in claim 17 , wherein said constraining element is placed on said stent while said stent is in the partially radially compressed state.
Claim 25
Dependent Claim
17 words
An intraluminal prosthesis as in claim 17 , wherein said constraining element further comprises a therapeutic agent.
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| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 2006-09-01 | 2007-03-03 | 2007-09-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2010-09-01 | 2011-03-03 | 2011-09-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2014-09-01 | 2015-03-03 | 2015-09-02 | $7700.00 | Window Closed / Lapsed |