Patent US2027193A successfully refreshed from Google Patents.
US6315708B1
Expired / Lapsed
US
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Stent with self-expanding end sections
Assignee: Cordis US Corp
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Filing: 2000-03-31
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Granted: 2001-11-13
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Expires: 2020-03-31
Abstract
Abstract The present invention is a hybrid stent that is defined as having a central section that is balloon expandable and end sections that are self-expanding. The entire stent is mounted on a balloon of a balloon angioplasty catheter. One way to retain the self-expanding portion of the stent onto a balloon onto which it has been nested is to place a cylindrical elastomer tube around each of the self-expanding end sections of the stent. Another way to retain the hybrid stent onto a stent delivery system is to use a conventional sheath that is pulled back to initiate stent deployment
Inventors
- 👤 Sean Salmon
- 👤 Dieter Stockel
- 👤 Robert E. Fischell
- 👤 Tim A. Fischell
- 👤 David R. Fischell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 22:54
CPC Classifications
A; A61; A61F; A61F2/00; A61F2/95; A61F2/958; A61F2/82; A61F2/86; A61F2/90; A61F2002/9583; A61F2250/00; A61F2250/0014; A61F2250/0018; A61F2250/0042; A61F2250/0048
Claims Analysis
Total Claims: 50
Claim 1
Independent Claim
117 words
A system for maintaining the patency of a vessel of the human body, the system comprising: a flexible guide wire; a balloon angioplasty catheter having a lumen through which the guide wire can be slideably moved and also having a distal section where an inflatable balloon is located, the balloon having a length L 4 of its cylindrical central section when the balloon is inflated to a pressure of approximately 10 atmospheres; and, a pre-deployed hybrid stent mounted onto the balloon of the balloon angioplasty catheter, the stent having a deployed length L 5 wherein, L 5 >L 4 , the stent also having a central section that is balloon expandable and end sections that are self-expanding.
Claim 2
Independent Claim
117 words
A system for maintaining the patency of a vessel of the human body, the system comprising: a flexible guide wire; a balloon angioplasty catheter having a lumen through which the guide wire can be slideably moved and also having a distal section where an inflatable balloon is located, the balloon having a length L 4 of its cylindrical central section when the balloon is inflated to a pressure of approximately 10 atmospheres; and, a pre-deployed hybrid stent mounted onto the balloon of the balloon angioplasty catheter, the stent having a deployed length L 5 wherein, L 5 >L 4 , the stent also having a central section that is balloon expandable and end sections that are self-expanding.
Claim 3
Dependent Claim
34 words
The system of claim 1 wherein the end sections are formed from a shape-memory alloy having a transition temperature above which it seeks its preset state, the transition temperature being below 37 degrees Centigrade.
Claim 4
Dependent Claim
17 words
The system of claim 2 wherein nitinol is used to form said end sections of the stent.
Claim 5
Dependent Claim
18 words
The system of claim 1 wherein the stent when deployed is approximately longitudinally centered on the inflated balloon.
Claim 6
Dependent Claim
26 words
The system of claim 1 wherein the length L 5 is between 4 and 20 mm longer than the length L 4 of the inflated balloon.
Claim 7
Dependent Claim
18 words
The system of claim 1 wherein the stent is crimped onto the balloon of the balloon angioplasty catheter.
Claim 8
Dependent Claim
27 words
The system of claim 1 wherein the stent is nested onto the inflated balloon by expanding portions of the balloon into the interstices of the non-deployed stent.
Claim 9
Dependent Claim
52 words
The system of claim 1 wherein each of the self-expanding end sections of the stent is at least partially covered by an elastomer end tube that is adapted to slide outward beyond the edges of the stent when the balloon is inflated to deploy the balloon expandable central section of the stent.
Claim 10
Dependent Claim
14 words
The system of claim 1 wherein the hybrid stent is a radioisotope hybrid stent.
Claim 11
Dependent Claim
15 words
The system of claim 9 wherein the radioisotope hybrid stent is a beta particle emitter.
Claim 12
Dependent Claim
12 words
The system of claim 10 wherein the beta particle emitter is phosphorous-32.
Claim 13
Dependent Claim
20 words
The system of claim 10 wherein the beta particle emitter has a source strength of between 0.1 and 100 microCuries.
Claim 14
Dependent Claim
15 words
The system of claim 9 wherein the radioisotope hybrid stent is a gamma ray emitter.
Claim 15
Dependent Claim
12 words
The system of claim 13 wherein the gamma ray emitter is palladium-103.
Claim 16
Dependent Claim
19 words
The system of claim 13 wherein the gamma ray emitter has a source strength between 0.1 and 100 milliCuries.
Claim 17
Independent Claim
147 words
A method for placing a self-expanding stent within a stenosis of a vessel of a human body, the method comprising the following steps: a) mounting a hybrid stent having self-expanding end sections onto a balloon located at a distal section of a balloon angioplasty catheter, the self-expanding end sections being formed from a shape-memory metal having a transition temperature that is less than 37 degrees Centigrade, the stent having a length L 5 that is greater than the length L 4 of the cylindrical central section of the balloon when inflated to a pressure of 10 atmospheres; b) inserting the stent mounted onto the balloon angioplasty catheter into a stenosis within a vessel of the human body; c) injecting contrast medium into the balloon to a pressure of at least 6 atmospheres; d) deflating the balloon; and e) removing the balloon angioplasty catheter from the human body.
Claim 18
Independent Claim
147 words
A method for placing a self-expanding stent within a stenosis of a vessel of a human body, the method comprising the following steps: a) mounting a hybrid stent having self-expanding end sections onto a balloon located at a distal section of a balloon angioplasty catheter, the self-expanding end sections being formed from a shape-memory metal having a transition temperature that is less than 37 degrees Centigrade, the stent having a length L 5 that is greater than the length L 4 of the cylindrical central section of the balloon when inflated to a pressure of 10 atmospheres; b) inserting the stent mounted onto the balloon angioplasty catheter into a stenosis within a vessel of the human body; c) injecting contrast medium into the balloon to a pressure of at least 6 atmospheres; d) deflating the balloon; and e) removing the balloon angioplasty catheter from the human body.
Claim 19
Dependent Claim
14 words
The method of claim 16 wherein the hybrid stent is a radioisotope hybrid stent.
Claim 20
Independent Claim
134 words
A system for maintaining the patency of a vessel of the human body, the system comprising: a flexible guide wire; a balloon angioplasty catheter having a lumen through which the guide wire can be slideably moved and also having a distal section where an inflatable balloon is located, the balloon having a length L 4 of its cylindrical central section when the balloon is inflated to a pressure of approximately 10 atmospheres; and, a pre-deployed, hybrid metal stent crimped onto the inflatable balloon, the stent having a deployed length L 5 and also having end sections formed from a shape memory metal having a transition temperature above which it seeks its preset state which is the state when the stent has its nominal deployed diameter, the transition temperature being less than 37 degrees Centigrade.
Claim 21
Independent Claim
134 words
A system for maintaining the patency of a vessel of the human body, the system comprising: a flexible guide wire; a balloon angioplasty catheter having a lumen through which the guide wire can be slideably moved and also having a distal section where an inflatable balloon is located, the balloon having a length L 4 of its cylindrical central section when the balloon is inflated to a pressure of approximately 10 atmospheres; and, a pre-deployed, hybrid metal stent crimped onto the inflatable balloon, the stent having a deployed length L 5 and also having end sections formed from a shape memory metal having a transition temperature above which it seeks its preset state which is the state when the stent has its nominal deployed diameter, the transition temperature being less than 37 degrees Centigrade.
Claim 22
Dependent Claim
16 words
The system of claim 18 wherein the metal from which the stent is made is Nitinol.
Claim 23
Dependent Claim
45 words
The system of claim 18 wherein the stent when deployed is approximately longitudinally centered on the inflated balloon. 21 .The system of claim 18 wherein the length L 5 is between 4 and 20 mm longer than the length L 4 of the inflated balloon.
Claim 24
Dependent Claim
14 words
The system of claim 18 wherein the hybrid stent is a radioisotope hybrid stent.
Claim 25
Independent Claim
118 words
A system for maintaining the patency of a vessel of the human body, the system comprising: a flexible guide wire; a balloon angioplasty catheter having a lumen through which the guide wire can be slideably moved and also having a distal section where an inflatable balloon is located, a pre-deployed, hybrid metal stent placed onto the inflatable balloon, the stent having end sections formed from a shape-memory metal having a transition temperature above which it seeks its preset state which is the state when the stent has its nominal deployed diameter, the transition temperature being less than 37 degrees Centigrade, the stent also having a central section that is balloon expandable at the temperature of a human body.
Claim 26
Independent Claim
118 words
A system for maintaining the patency of a vessel of the human body, the system comprising: a flexible guide wire; a balloon angioplasty catheter having a lumen through which the guide wire can be slideably moved and also having a distal section where an inflatable balloon is located, a pre-deployed, hybrid metal stent placed onto the inflatable balloon, the stent having end sections formed from a shape-memory metal having a transition temperature above which it seeks its preset state which is the state when the stent has its nominal deployed diameter, the transition temperature being less than 37 degrees Centigrade, the stent also having a central section that is balloon expandable at the temperature of a human body.
Claim 27
Dependent Claim
62 words
The system of claim 23 wherein the entire stent is made from Nitinol. 25 .The system of claim 23 wherein the Nitinol stent has a central section that is heat treated to have a transition temperature that is distinctly above 37 degrees Centigrade and the end sections are heat treated to have a transition temperature that is distinctly below 37 degrees Centigrade.
Claim 28
Dependent Claim
22 words
The system of claim 23 wherein the stent has self-expanding end sections that are fixedly attached to a balloon expandable central section.
Claim 29
Dependent Claim
22 words
The system of claim 23 wherein the end sections are formed from Nitinol and the central section is formed from stainless steel.
Claim 30
Dependent Claim
21 words
The system of claim 23 wherein the end sections are formed from Nitinol and the central section is formed from tantalum.
Claim 31
Dependent Claim
18 words
The system of claim 23 wherein the stent when deployed is approximately longitudinally centered on the inflated balloon.
Claim 32
Dependent Claim
14 words
The system of claim 23 wherein the hybrid stent is a radioisotope hybrid stent.
Claim 33
Dependent Claim
43 words
A hybrid stent for placement within a vessel of a human body, the stent having end sections that are self-expanding and a central section that is formed from a conventional metal and has a stent design that is balloon expandable and not self-expanding.
Claim 34
Dependent Claim
43 words
A hybrid stent for placement within a vessel of a human body, the stent having end sections that are self-expanding and a central section that is formed from a conventional metal and has a stent design that is balloon expandable and not self-expanding.
Claim 35
Dependent Claim
26 words
The hybrid stent of claim 31 wherein the end sections are formed from a shape-memory alloy having a transition temperature that is below 37 degrees Centigrade.
Claim 36
Dependent Claim
22 words
The hybrid stent of claim 31 wherein the end sections are formed from a conventional metal in a design that is self-expanding.
Claim 37
Dependent Claim
15 words
The hybrid stent of claim 31 wherein the central section is formed from stainless steel.
Claim 38
Dependent Claim
14 words
The hybrid stent of claim 31 wherein the central section is formed from tantalum.
Claim 39
Dependent Claim
30 words
The hybrid stent of claim 31 wherein the central section is formed from a composite tube consisting of a center tube of tantalum sandwiched between two tubes of stainless steel.
Claim 40
Dependent Claim
40 words
The hybrid stent of claim 31 wherein the self-expanding end sections are made from stainless steel in a design that is self-expanding and the balloon expandable central section is made from stainless steel in a design that is balloon expandable.
Claim 41
Dependent Claim
57 words
The hybrid stent of claim 31 formed from two pieces, the first piece being a Nitinol stent that extends for the entire length of the hybrid stent and a second piece consisting of a central section formed from stainless steel that is placed within an indentation that is situated at the longitudinal center of the first portion.
Claim 42
Dependent Claim
56 words
The hybrid stent of claim 31 formed from two pieces, the first piece being a Nitinol stent that extends for the entire length of the hybrid stent and a second piece consisting of a central section formed from tantalum that is placed within an indentation that is situated at the longitudinal center of the first portion.
Claim 43
Dependent Claim
74 words
The hybrid stent of claim 31 formed from two pieces, the first piece being a Nitinol stent that extends for the entire length of the hybrid stent and a second piece which is a central section formed from a composite tube having a center tube formed from tantalum sandwiched between two tubes of stainless steel, the composite tube being placed within an indentation that is situated at the longitudinal center of the first portion.
Claim 44
Dependent Claim
96 words
A hybrid stent adapted for implantation into a vessel of a human body, the hybrid stent being formed from two pieces, the first piece being a self-expanding stent having a central section and two end sections, and a second piece being a balloon expandable stent that is shorter in length than the self-expanding stent, the self-expanding stent extending for the entire length of the hybrid stent, the second piece being co-axially placed at the center of the self-expanding stent, the balloon expandable stent being adapted to constrain expansion of the central section of the self-expanding stent.
Claim 45
Dependent Claim
96 words
A hybrid stent adapted for implantation into a vessel of a human body, the hybrid stent being formed from two pieces, the first piece being a self-expanding stent having a central section and two end sections, and a second piece being a balloon expandable stent that is shorter in length than the self-expanding stent, the self-expanding stent extending for the entire length of the hybrid stent, the second piece being co-axially placed at the center of the self-expanding stent, the balloon expandable stent being adapted to constrain expansion of the central section of the self-expanding stent.
Claim 46
Dependent Claim
19 words
The hybrid stent of claim 41 wherein the balloon expandable stent is mounted co-axially outside of the self-expanding stent.
Claim 47
Dependent Claim
16 words
The hybrid stent of claim 41 wherein the balloon expandable stent is made of stainless steel.
Claim 48
Dependent Claim
15 words
The hybrid stent of claim 41 wherein the balloon expandable stent is made of tantalum.
Claim 49
Dependent Claim
15 words
The hybrid stent of claim 41 wherein the self-expandable stent is made of stainless steel.
Claim 50
Dependent Claim
14 words
The hybrid stent of claim 41 wherein the self-expanding stent is made of Nitinol.
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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) | 2004-11-12 | 2005-05-14 | 2005-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2008-11-12 | 2009-05-14 | 2009-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2012-11-12 | 2013-05-14 | 2013-11-13 | $7700.00 | Window Closed / Lapsed |