US5879282A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catheter having an expandable radioactive source
Assignee: Cordis US Corp
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Filing: 1997-01-21
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Granted: 1999-03-09
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Expires: 2017-01-21
Abstract
Abstract A balloon catheter for irradiation with or without dilatation of an arterial stenosis has an inflatable balloon and a generally cylindrical, thin-walled, elastic radioactive source both located coaxially at a distal section of the balloon catheter. The elastic radioactive source is moved radially outward as a result of injection of an inflation fluid into the inflatable balloon thus placing the radioactive source in close proximity to the wall of a vessel of the human body into which the balloon catheter has been inserted.
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 02:07
CPC Classifications
A; A61; A61N; A61N5/00; A61N5/10; A61N5/1001; A61N5/1002; A61N2005/1004
Claims Analysis
Total Claims: 35
Claim 1
Independent Claim
124 words
A balloon catheter system comprising a balloon catheter, an inflation liquid and a flexible guide wire, the balloon catheter having a distal section and also having an inflatable balloon and a generally cylindrical, thin-walled, elastic radioactive source both located coaxially at the distal section of the balloon catheter, the inflatable balloon being adapted to be inflated by injection into the balloon of the inflation liquid, the elastic radioactive source having a proximal end and a distal end and being adapted to move radially outward as a result of the injection of the inflation liquid into the inflatable balloon thus placing the radioactive source in close proximity to the wall of a vessel of the human body into which the balloon catheter has been inserted.
Claim 2
Dependent Claim
124 words
A balloon catheter system comprising a balloon catheter, an inflation liquid and a flexible guide wire, the balloon catheter having a distal section and also having an inflatable balloon and a generally cylindrical, thin-walled, elastic radioactive source both located coaxially at the distal section of the balloon catheter, the inflatable balloon being adapted to be inflated by injection into the balloon of the inflation liquid, the elastic radioactive source having a proximal end and a distal end and being adapted to move radially outward as a result of the injection of the inflation liquid into the inflatable balloon thus placing the radioactive source in close proximity to the wall of a vessel of the human body into which the balloon catheter has been inserted.
Claim 3
Dependent Claim
17 words
The balloon catheter system of claim 1 wherein the radioactive source is predominantly a beta particle emitter.
Claim 4
Dependent Claim
14 words
The balloon catheter system of claim 2 wherein the beta particle emitter is phosphorous-32.
Claim 5
Dependent Claim
14 words
The balloon catheter system of claim 2 wherein the beta particle emitter is yttrium-90.
Claim 6
Dependent Claim
15 words
The balloon catheter system of claim 1 wherein the inflatable balloon is an angioplasty balloon.
Claim 7
Dependent Claim
15 words
The balloon catheter system of claim 1 wherein the inflatable balloon is an elastic balloon.
Claim 8
Dependent Claim
43 words
The balloon catheter system of claim 1 wherein a first radiopaque marker band is used to indicate the proximal end of the elastic radioactive source and a second radiopaque marker band is used to indicate the distal end of the elastic radioactive source.
Claim 9
Dependent Claim
37 words
The balloon catheter system of claim 1 wherein the balloon catheter includes a guide wire lumen and the guide wire is an oxygenation guide wire that is adapted to perfuse tissue located distally to the inflatable balloon.
Claim 10
Dependent Claim
58 words
The balloon catheter system of claim 1 wherein the balloon catheter includes a guide wire lumen and the guide wire is placed through the guide wire lumen, the guide wire having a high density metal, highly radiopaque distal portion for indicating the longitudinal position of a dilated stenosis which is to be irradiated by the elastic radioactive source.
Claim 11
Dependent Claim
34 words
The balloon catheter system of claim 1 wherein the inflation liquid is a highly concentrated contrast medium having a concentration of at least 55% of an iodine based radiopaque liquid in normal saline solution.
Claim 12
Dependent Claim
21 words
The balloon catheter system of claim 10 wherein the inflation liquid includes a material having an atomic number greater than 53.
Claim 13
Dependent Claim
24 words
The balloon catheter system of claim 1 wherein the elastic radioactive source is made from silicone rubber into which a radioisotope has been placed.
Claim 14
Dependent Claim
16 words
The balloon catheter system of claim 12 wherein the radioisotope is a compound of phosphorous 32.
Claim 15
Dependent Claim
16 words
The balloon catheter system of claim 13 wherein the compound containing phosphorous 32 is adenosine triphosphate.
Claim 16
Dependent Claim
15 words
The balloon catheter system of claim 13 wherein the compound containing phosphorous 32 is orthophosphate.
Claim 17
Dependent Claim
30 words
The balloon catheter system of claim 1 wherein the balloon catheter has both an angioplasty balloon and an elastic balloon placed coaxially at the distal section of the balloon catheter.
Claim 18
Dependent Claim
18 words
The balloon catheter system of claim 16 wherein the elastic balloon is positionally located inside the angioplasty balloon.
Claim 19
Dependent Claim
18 words
The balloon catheter system of claim 16 wherein the elastic balloon is positionally located outside the angioplasty balloon.
Claim 20
Dependent Claim
19 words
The balloon catheter system of claim 16 wherein the elastic radioactive source is fixedly attached to the elastic balloon.
Claim 21
Dependent Claim
36 words
The balloon catheter system of claim 1 wherein the inflatable balloon of the balloon catheter is an angioplasty balloon and the elastic radioactive source is in the form of a cylinder that surrounds the angioplasty balloon.
Claim 22
Dependent Claim
23 words
The balloon catheter system of claim 20 wherein the elastic radioactive source is tapered at both its proximal end and its distal end.
Claim 23
Dependent Claim
45 words
A balloon angioplasty catheter having a distal section; an angioplasty balloon formed from a plastic material located at the distal section of the balloon angioplasty catheter, the angioplasty balloon having a radioactive material incorporated into the plastic material from which the angioplasty balloon is formed.
Claim 24
Dependent Claim
45 words
A balloon angioplasty catheter having a distal section; an angioplasty balloon formed from a plastic material located at the distal section of the balloon angioplasty catheter, the angioplasty balloon having a radioactive material incorporated into the plastic material from which the angioplasty balloon is formed.
Claim 25
Dependent Claim
17 words
The balloon angioplasty catheter of claim 22 wherein the radioactive source is predominantly a beta particle emitter.
Claim 26
Dependent Claim
14 words
The balloon angioplasty catheter of claim 22 wherein the beta particle emitter is phosphorous-32.
Claim 27
Dependent Claim
40 words
An elastic balloon catheter having a distal section; an elastic balloon formed from an elastomer located at the distal section of the elastic balloon catheter and a radioactive material incorporated into the elastomer from which the elastic balloon is formed.
Claim 28
Dependent Claim
40 words
An elastic balloon catheter having a distal section; an elastic balloon formed from an elastomer located at the distal section of the elastic balloon catheter and a radioactive material incorporated into the elastomer from which the elastic balloon is formed.
Claim 29
Dependent Claim
17 words
The elastic balloon catheter of claim 25 wherein the radioactive material is predominantly a beta particle emitter.
Claim 30
Dependent Claim
14 words
The elastic balloon catheter of claim 25 wherein the beta particle emitter is phosphous-32.
Claim 31
Dependent Claim
14 words
The elastic balloon catheter of claim 25 wherein the beta particle emitter is yttrium-90.
Claim 32
Independent Claim
74 words
A system for dilating and irradiating an arterial stenosis the system comprising: a balloon angioplasty catheter having a distal section and having an angioplasty balloon located at the distal section of the balloon angioplasty catheter; and a sheath situated coaxially around the balloon angioplasty catheter and adapted to move slideably over the balloon angioplasty catheter, the sheath having a distal section where a radioactive source in the form of an elastic cylinder is located.
Claim 33
Independent Claim
74 words
A system for dilating and irradiating an arterial stenosis the system comprising: a balloon angioplasty catheter having a distal section and having an angioplasty balloon located at the distal section of the balloon angioplasty catheter; and a sheath situated coaxially around the balloon angioplasty catheter and adapted to move slideably over the balloon angioplasty catheter, the sheath having a distal section where a radioactive source in the form of an elastic cylinder is located.
Claim 34
Independent Claim
119 words
A system for irradiating a dilated arterial stenosis without unduly irradiating health care workers, the system being adapted for placement into an artery of a human body; the system comprising: a balloon catheter having a proximal section and a distal section and having an inflatable balloon and an expandable radioactive source both located at the distal section of the balloon catheter; and a radiation shield being coaxially situated at the proximal section of the balloon catheter, the entire radiation shield remaining exterior to the human body while the balloon catheter is advanced through the radiation shield and into a vessel of the human body so as to place the radioactive source at the site of the dilated arterial stenosis.
Claim 35
Independent Claim
119 words
A system for irradiating a dilated arterial stenosis without unduly irradiating health care workers, the system being adapted for placement into an artery of a human body; the system comprising: a balloon catheter having a proximal section and a distal section and having an inflatable balloon and an expandable radioactive source both located at the distal section of the balloon catheter; and a radiation shield being coaxially situated at the proximal section of the balloon catheter, the entire radiation shield remaining exterior to the human body while the balloon catheter is advanced through the radiation shield and into a vessel of the human body so as to place the radioactive source at the site of the dilated arterial stenosis.
References Cited (Backward Citations)
GB793158A
Cited
EP0497495A2
Cited
US5484384A
Cited
US5302168A
Cited
US5411466A
Cited
US5730698A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2002-03-08 | 2002-09-07 | 2003-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2006-03-08 | 2006-09-07 | 2007-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2010-03-08 | 2010-09-07 | 2011-03-09 | $7700.00 | Window Closed / Lapsed |