US5178618A
Expired / Lapsed
US
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Method and device for recanalization of a body passageway
Assignee: The Brigham and Women's Hospital Inc
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Filing: 1991-01-16
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Granted: 1993-01-12
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Expires: 2011-01-16
Abstract
Abstract The present invention relates to a method and device for the recanalization of an occluded blood vessel which includes an expandable wire-mesh stent or support and an external radio frequency (rf) energy source or other suitable heat generating device. The device of the present invention may also be used to recanalize other occluded body passageways or conduits.
Inventors
- 👤 Krishna Kandarpa
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 18:04
CPC Classifications
A; A61; A61B; A61B18/00; A61B18/04; A61B18/08; A61B18/082; A61B18/18; A61B18/20; A61B18/22; A61B18/28; A61F; A61F2/00; A61F2/95; A61B17/00; A61B17/22; A61B2017/22001; A61B2017/22002; A61B2017/22051; A61B2017/22061; A61M; A61M25/00; A61M25/10; A61M25/104
Claims Analysis
Total Claims: 32
Claim 1
Independent Claim
59 words
A device for recanalization of an occluded body passageway, comprising: a stent, wherein said stent may be inserted into said occluded body passageway and has sufficient radial resistance to recanalize said passageway; and means for destroying cells of said body passageway which may reocclude the same by heating said stent to a temperature between 50° C. and 100° C.
Claim 2
Independent Claim
59 words
A device for recanalization of an occluded body passageway, comprising: a stent, wherein said stent may be inserted into said occluded body passageway and has sufficient radial resistance to recanalize said passageway; and means for destroying cells of said body passageway which may reocclude the same by heating said stent to a temperature between 50° C. and 100° C.
Claim 3
Dependent Claim
13 words
The device of claim 1, wherein said stent is a balloon expandable stent.
Claim 4
Dependent Claim
18 words
The device of claim 1, wherein said stent is biased to exert a radial force against the passageway.
Claim 5
Dependent Claim
16 words
The device of claim 1, wherein said means for heating said stent is a resistive heater.
Claim 6
Dependent Claim
23 words
The device of claim 1, wherein said means for heating said stent generates microwaves at a frequency sufficient to couple to said stent.
Claim 7
Dependent Claim
17 words
The device of claim 1, wherein said means for heating said stent is a laser radiation source.
Claim 8
Dependent Claim
16 words
The device of claim 1, wherein said means for heating said stent is an optical fiber.
Claim 9
Dependent Claim
10 words
The device of claim 1, wherein said stent is metallic.
Claim 10
Independent Claim
61 words
The device for recanalization of an occluded body passageway, comprising: a stent, wherein said stent may be inserted into said occluded body passageway and has sufficient radial resistance to recanalize said passageway; and a means for destroying cells of said body passageway which may reocclude the same by heating said body passageway to a temperature between 50° C. and 100° C.
Claim 11
Independent Claim
61 words
The device for recanalization of an occluded body passageway, comprising: a stent, wherein said stent may be inserted into said occluded body passageway and has sufficient radial resistance to recanalize said passageway; and a means for destroying cells of said body passageway which may reocclude the same by heating said body passageway to a temperature between 50° C. and 100° C.
Claim 12
Dependent Claim
13 words
The device of claim 9, wherein said stent is a balloon expandable stent.
Claim 13
Dependent Claim
19 words
The device of claim 9, wherein said stent is biased to exert a radial force against said body passageway.
Claim 14
Dependent Claim
18 words
The device of claim 9, wherein said means for heating said body passageway is a radio frequency source.
Claim 15
Dependent Claim
16 words
The device of claim 12, wherein said radio frequency source is external to said body passageway.
Claim 16
Dependent Claim
31 words
The device of claim 13, wherein said radio frequency source includes paired multiple feed inductor rings positioned between a plurality of capacitor plates for producing a tuned radio frequency electromagnetic field.
Claim 17
Dependent Claim
10 words
The device of claim 9, wherein said stent is metallic.
Claim 18
Independent Claim
57 words
A method for recanalizing an occluded body passageway comprising the steps of: a) introducing a balloon catheter having a stent disposed about said catheter into a passageway to a location proximate an occlusion; b) expanding said balloon catheter thereby expanding said stent; c) applying heat to said stent; and d) removing said balloon catheter from said passageway.
Claim 19
Independent Claim
57 words
A method for recanalizing an occluded body passageway comprising the steps of: a) introducing a balloon catheter having a stent disposed about said catheter into a passageway to a location proximate an occlusion; b) expanding said balloon catheter thereby expanding said stent; c) applying heat to said stent; and d) removing said balloon catheter from said passageway.
Claim 20
Dependent Claim
19 words
The method of claim 16, wherein said stent is heated to a temperature between 50° C. and 100° C.
Claim 21
Dependent Claim
18 words
The method of claim 16, wherein said stent is biased to exert a radial force against the passageway.
Claim 22
Dependent Claim
14 words
The method of claim 16, wherein said heat is generated by a resistive heater.
Claim 23
Dependent Claim
24 words
The method of claim 16, wherein said heat is generated by microwaves at a frequency sufficient to couple to the material forming the stent.
Claim 24
Dependent Claim
15 words
The method of claim 16, wherein said heat is generated by a laser radiation source.
Claim 25
Dependent Claim
14 words
The method of claim 16, wherein said heat is generated by an optical fiber.
Claim 26
Independent Claim
60 words
A method for recanalizing an occluded body passageway comprising the steps of: a) introducing a balloon catheter having a stent disposed about said catheter into a passageway to a location proximate an occlusion; b) expanding said balloon catheter thereby expanding said stent; c) applying heat to the tissue of said passageway; and d) removing said balloon catheter from said passageway.
Claim 27
Independent Claim
60 words
A method for recanalizing an occluded body passageway comprising the steps of: a) introducing a balloon catheter having a stent disposed about said catheter into a passageway to a location proximate an occlusion; b) expanding said balloon catheter thereby expanding said stent; c) applying heat to the tissue of said passageway; and d) removing said balloon catheter from said passageway.
Claim 28
Dependent Claim
18 words
The method of claim 23, wherein said stent is biased to exert a radial force against the passageway.
Claim 29
Dependent Claim
19 words
The method of claim 23, wherein said passageway is heated to a temperature between 50° C. and 100° C.
Claim 30
Dependent Claim
15 words
The method of claim 23, wherein said heat is generated by a radio frequency source.
Claim 31
Dependent Claim
15 words
The method of claim 26, wherein said radio frequency source is external to said passageway.
Claim 32
Dependent Claim
38 words
The method of claim 27, wherein said step of applying heat to the tissue of said passageway utilizes paired multiple feed inductor rings positioned between a plurality of capacitor plates to produce a tuned radio frequency electromagnetic field.
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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) | 1996-01-12 | 1996-07-13 | 1997-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2000-01-12 | 2000-07-13 | 2001-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2004-01-12 | 2004-07-13 | 2005-01-12 | $7700.00 | Window Closed / Lapsed |