EP0773006A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Self-expanding stent
Assignee: Jomed Inc
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Filing: 1996-11-11
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Granted: —
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Expires: 2016-11-11
Abstract
Abstract The present invention provides a self-expanding stent for insertion into an artery or other internal vessel. The stent is formed from a series of radial bands each formed with overlapping first and second ends. The overlap between the first and second ends is variable, allowing each band to move between a contracted configuration and an expanded configuration. The first and second ends of each band are both formed to include a tab which is folded to hold the first and second end against the band. The bands are distributed along a common axis to form a cylinder and interconnected by a pair of elongated strips. In use, the stent is placed over a balloon catheter and compressed to adopt the contracted configuration. The balloon catheter and stent are then advanced through a placement catheter and to a target site where the balloon is partially inflated to free the stent for self-expansion. The balloon may then be more fully inflated to further expand any of the radial bands in the stent. The balloon is then deflated and removed, leaving the expanded stent to support that target site.
Inventors
- 👤 Kenneth W. Carpenter
- 👤 Leo R. Roucher, Jr
- 👤 Eugene J. Jung, Jr
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-24 06:26
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/82; A61F2/92; A61F2/95; A61F2/958
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
241 words
A self-expanding stent for placement in a vessel which comprises: a plurality of radial bands, one of said bands being a proximal radial band and one of said bands being a distal radial band, each said band having a first radial edge and a second radial edge, with an inner surface and an outer surface between said edges, each said band also having a first end and a second end with said first end overlapping said second end to create an overlap region, said first end being moveable relative to said second end to iso-concentrically reconfigure each band between a contracted configuration having a first diameter and an expanded configuration having a second diameter; at least one tab projecting from said first radial edge of said proximal radial band for folding said tab over said proximal radial band to hold said first end and said second end of said proximal radial band against said proximal radial band in said overlap region; at least one tab projecting from said second radial edge of said distal radial band for folding said tab over said distal radial band to hold said first end and said second end of said distal radial band against said distal radial band in said overlap region; a first elongated strip, said elongated strip interconnecting said first end of each said radial band; and a second elongated strip, said elongated strip interconnecting said second end of each said radial band.
Claim 2
Dependent Claim
20 words
A self-expanding stent as recited in claim 1 wherein said stent is fabricated as a single piece of stainless steel.
Claim 3
Dependent Claim
42 words
A self-expanding stent as recited in claim 1 wherein each said tab projecting from said distal radial band is formed with a protrusion, said protrusion oriented to face said distal radial band when said tab is folded over said distal radial band.
Claim 4
Dependent Claim
40 words
A self-expanding stent as recited in claim 3 wherein said distal radial band is formed with a first detent, said first detent being positioned to engage one said protrusion when said distal radial band is configured in said contracted configuration.
Claim 5
Dependent Claim
40 words
A self-expanding stent as recited in claim 3 wherein said distal radial band is formed with a second detent, said second detent being positioned to engage one said protrusion when said distal radial band is configured in said expanded configuration.
Claim 6
Dependent Claim
46 words
A self-expanding stent as recited in claim 3 wherein said distal radial band is formed with at least one additional detent, said additional detent being positioned to engage one said protrusion when said distal radial band is configured between said contracted configuration and said expanded configuration.
Claim 7
Dependent Claim
42 words
A self-expanding stent as recited in claim 1 wherein each said tab projecting from said proximal radial band is formed with a protrusion, said protrusion oriented to face said proximal radial band when said tab is folded over said proximal radial band.
Claim 8
Dependent Claim
40 words
A self-expanding stent as recited in claim 3 wherein said proximal radial band is formed with a first detent, said first detent being positioned to engage one said protrusion when said proximal radial band is configured in said contracted configuration.
Claim 9
Dependent Claim
40 words
A self-expanding stent as recited in claim 3 wherein said proximal radial band is formed with a second detent, said second detent being positioned to engage one said protrusion when said proximal radial band is configured in said expanded configuration.
Claim 10
Dependent Claim
46 words
A self-expanding stent as recited in claim 3 wherein said proximal radial band is formed with at least one additional detent, said additional detent being positioned to engage one said protrusion when said proximal radial band is configured between said contracted configuration and said expanded configuration.
Claim 11
Dependent Claim
25 words
A self-expanding stent as recited in claim 1 wherein said second diameter of said expanded configuration is in the range of 1.0 to 3.0 millimeters.
Claim 12
Dependent Claim
24 words
A self-expanding stent as recited in claim 1 wherein said expandable stent has an overall length in the range of ten to forty millimeters.
Claim 13
Dependent Claim
181 words
A self-expanding stent for placement in a vessel which comprises: a plurality of radial bands, at least one of said bands being a locking radial band, each said band having a first radial edge and a second radial edge, each said band also having a first end and a second end, said first end overlapping said second end to create an overlap region, said first end being moveable relative to said second end to iso-concentrically reconfigure each band between a contracted configuration having a first diameter and an expanded configuration having a second diameter; at least one tab projecting from said first radial edge of each said locking radial band for folding said tab over said locking radial band to hold said first end and said second end of said locking radial band against said locking radial band in said overlap region; means for interconnecting said first end of each said radial band; means for interconnecting said second end of each said radial band; and means for selectively locking said locking radial band in said contracted configuration and said expanded configuration.
Claim 14
Dependent Claim
39 words
A self-expanding stent as recited in claim 13 wherein said locking means includes a protrusion attached to each said tab, said protrusion oriented to face said locking radial band when said tab is folded over said locking radial band.
Claim 15
Dependent Claim
39 words
A self-expanding stent as recited in claim 14 wherein said locking radial band is formed with a first detent, said first detent being positioned to engage said protrusion when said locking radial band is configured in said contracted configuration.
Claim 16
Dependent Claim
39 words
A self-expanding stent as recited in claim 14 wherein said locking radial band is formed with a second detent, said second detent being positioned to engage said protrusion when said locking radial band is configured in said expanded configuration.
Claim 17
Dependent Claim
45 words
A self-expanding stent as recited in claim 14 wherein said locking radial band is formed with at least one additional detent, said additional detent being positioned to engage said protrusion when said locking radial band is configured between said contracted configuration and said expanded configuration.
Claim 18
Dependent Claim
27 words
A self-expanding stent as recited in claim 13 further comprising a thin, permeable substrate, said substrate applied to substantially cover said outer surface of said elongated cylinder.
Claim 19
Dependent Claim
25 words
A self-expanding stent as recited in claim 11 wherein said second diameter of said expanded configuration is in the range of 1.0 to 3.0 millimeters.
Claim 20
Dependent Claim
24 words
A self-expanding stent as recited in claim 11 wherein said expandable stent has an overall length in the range of ten to forty millimeters.
Claim 21
Independent Claim
284 words
A method for placing a self-expanding stent at a target site in a vessel of a patient which comprises the steps of: providing a self-expanding stent which comprises a plurality of radial bands, at least one of said bands being a locking radial band, each said band having a first radial edge and a second radial edge, each said band also having a first end and a second end, said first end overlapping said second end to create an overlap region, said first end being moveable relative to said second end to iso-concentrically reconfigure each band between a contracted configuration having a first diameter and an expanded configuration having a second diameter, at least one tab projecting from said first radial edge of each said locking radial band for folding said tab over said locking radial band to hold said first end and said second end of said locking radial band against said locking radial band in said overlap region, means for interconnecting said first end of each said radial band, means interconnecting said second end of each said radial band, and means for selectively locking said locking radial band in said contracted configuration and said expanded configuration; providing an inflatable balloon catheter; providing a placement catheter; positioning said stent over said inflatable balloon catheter; configuring said stent to a contracted configuration; inserting said expandable stent and said inflatable balloon in said placement catheter; inserting said placement catheter into said vessel; advancing said expandable stent and said inflatable balloon distally out of said placement catheter; advancing said expandable stent and said inflatable balloon to said target site; partially inflating said balloon to unlock said radial bands and allow said radial bands to resiliently self-expand.
Claim 22
Dependent Claim
23 words
A method as recited in claim 21 which further comprises the step of further inflating said balloon to further expand said radial bands.
Claim 23
Dependent Claim
33 words
A method as recited in claim 22 which further comprises the steps of: deflating said balloon; repositioning said balloon; reinflating said balloon to further expand a particular band within said plurality of bands.
References Cited (Backward Citations)
No citation records indexed.
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