AU2001274463A1 - Two balloon catheter for staged stent expansion - Google Patents
Two balloon catheter for staged stent expansionInfo
- Publication number
- AU2001274463A1 AU2001274463A1 AU2001274463A AU2001274463A AU2001274463A1 AU 2001274463 A1 AU2001274463 A1 AU 2001274463A1 AU 2001274463 A AU2001274463 A AU 2001274463A AU 2001274463 A AU2001274463 A AU 2001274463A AU 2001274463 A1 AU2001274463 A1 AU 2001274463A1
- Authority
- AU
- Australia
- Prior art keywords
- balloon
- stent
- catheter
- burst pressure
- length
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Description
TWO BALLOON STAGED STENT EXPANSION
FIELD OF THE INVENTION
The present invention relates generally to catheter balloons for implanting stents. More particularly, the present invention relates to a catheter balloon which utilizes two balloons coaxially disposed within one another.
BACKGROUND OF THE INVENTION
It is well known to use a balloon catheter to intralu inally deliver and implant a stent. Typically, to implant a stent with a balloon catheter, the unexpanded stent is disposed around the deflated balloon of a balloon catheter. The balloon is then delivered to the desired implantation site and inflated. The inflation of the balloon expands the stent, implanting it at the desired location. One shortcoming of conventional balloon catheters is that they may cause the ends of the stent to flare out during implantation. This flaring out is referred to as "dogboning". Dogboning causes at least two undesirable effects. First, dogboning exacerbates any foreshortening of the stent during expansion. Second, dogboning causes the edges of the end of the stent to project in a direction perpendicular to the wall of the vessel in which the stent is being implanted. These projecting edges potentially increase trauma to the wall of the lumen.
SUMMARY OF THE INVENTION
Embodiments of the present invention include a balloon catheter with two balloons is disclosed. An inner balloon is shorter than an outer balloon, and also shorter than a
stent which is to be implanted. The outer balloon overlays the inner balloon, and is longer that the stent.
To implant the stent, the catheter is delivered to a desired site in a vessel. Pressure is applied to the inner balloon, inflating the balloon and implanting the central portion of the stent. Further increases in pressure rupture the inner balloon. Because the outer balloon overlays the inner balloon, the pressure inflates the outer balloon, expanding the remainder of the stent. The balloons may then be deflated and removed, leaving the implanted stent in the vessel.
BRIEF DESCRIPTION OF THE DRAWINGS
Fig. 1 shows a cross-sectional view of an embodiment of a catheter balloon assembly constructed according to the principles of the present invention which is in the deflated condition;
Fig. 2 shows a cross-sectional view of the catheter of Fig. 1 after partial inflation; and Fig. 3 shows a cross-sectional view of the catheter of Fig. 1 after full inflation.
DETAILED DESCRIPTION OF THE INVENTION
Fig. 1 shows a schematic view of an embodiment of a catheter balloon constructed in accordance with the principles of the present invention. The details of the catheter have not been included here, as they are well known to those skilled in the art. The precise configurations of the catheter shaft, guidewire lumen, and inflation lumen can be chosen as desired. For example, the catheter may be designed as a rapid-exchange system or as an over-the-wire system. The balloon catheter includes a catheter shaft 2. An inner balloon 6 is sealed to the outer surface 4 of the catheter shaft 2. The length of the
inner balloon is chosen so that it is less than the length of the stent which it is designed to implant. The inner balloon 6 may be formed of a non-compliant material. An outer balloon 8 is disposed around the inner balloon 6. The inner surface 10 of the outer balloon is immediately adjacent to the outer surface of the inner balloon. The two surfaces are permitted to move with respect to each other. The outer balloon 8 is sealed to the outer surface 4 of the catheter shaft 2 at the ends of the balloon. The outer balloon 8 may be formed of a non-compliant material. In the illustrated embodiment, the length of the outer balloon is chosen so that it is approximately 4 mm longer than the stent. In this and other embodiments, when the stent is crimped around the deflated balloon, the same amount of balloon may extend past the stent on each side - - i.e. the balloon may, for example, extend past the stent by 2mm on each side.
An inflation lumen 16 is located within the catheter shaft 4. The inflation lumen 16 is in fluid communication with the interior 20 of the inner balloon 6 through an aperture 18 in the catheter shaft 4. A pressurized medium, such as saline, may be introduced into the inflation lumen 16 to inflate the inner balloon. The space between the inner balloon and the outer balloon is not provided with an inflation lumen.
In operation, a guidewire 22 may be routed to the desired inflation location. The balloon catheter, the catheter shaft 4 of which has a guidewire port located adjacent the balloons, with a crimped stent may be then placed over the guidewire 22 and delivered to the desired location. A pressurized medium is introduced into the inflation lumen. The pressurized medium passes into the interior 20 of the inner balloon 6, and begins to inflate the inner balloon 6. The inner balloon 6 applies pressure to both the stent 14 and the outer balloon 8. Typically,
at approximately 3 or 4 atmospheres (depending on the particular stent design chosen) , the stent 14 begins to expand. As shown in Fig. 2, because the inner balloon 6 is shorter than the stent 14, only the middle portion of the stent 14 begins to expand. At, for example, approximately five atmospheres, the stent 14 is sufficiently expanded so that it is implanted into the vessel wall.
As shown in Fig. 3, upon further application of the pressurized medium to the inflation lumen, the inner balloon 6 ruptures. The burst pressure of the inner balloon may be less than 10 atmospheres, and in some embodiments be approximately 5 atmospheres, for example. Rupture of the inner balloon 6 allows fluid communication •between the inflation lumen 16 and the cavity formed between the outer balloon and the inner balloon.
When further pressure is applied to the inflation lumen, the outer balloon expands the entire length of the stent. The operator may then apply as much pressure as desired, up to the burst pressure of the outer balloon to firmly implant the stent. Typically, the burst pressure of the outer balloon should be greater than that of the inner balloon. Thus, for example, in a particular embodiment the burst pressure of the inner balloon may be selected to be, for example, 5 atmospheres, and the burst pressure of the outer balloon may be selected to be equal to 10 atmospheres, i.e., to give an approximately 5 atmosphere difference .
The balloons may then be deflated, and the catheter and guidewire may then by removed. In the foregoing specification, the invention has been described with reference to specific exemplary embodiments.
It will, however, be evident that various modifications and changes may be made thereunto without departing from the broader spirit and scope of the invention as set forth in the appended claims. The specification and drawings are
accordingly to be regarded in an illustrative rather than a restrictive sense.
Claims (17)
1. A stent and balloon catheter in combination comprising: a balloon catheter with a first (6) and a second (8) balloon, the second balloon (8) overlaying the first balloon (6), the second balloon (8 ) having a length which is greater than a length of the first balloon (6); and an expandable stent (14) mounted over the first and second catheter balloons, wherein a burst pressure of the first balloon (6) is less than a burst pressure of the second balloon (8) .
2. The combination according to claim 1 wherein the burst pressure of the inner balloon (6) is less than 10 atmospheres.
3. The combination according to claim 1 or 2 wherein the burst pressure of the inner balloon (6) is approximately 5 atmospheres.
4. The combination according to claim 1, 2 or 3 wherein the burst pressure of the outer balloon (8) is greater than 10 atmospheres.
5. The combination according to any of claims 1-4 wherein the outer balloon (8) is formed of a non-compliant material.
6. The combination according to any of claims 1-5 wherein the inner balloon (6) is formed of a non-compliant material .
7. The combination according to any of claims 1-6 wherein the catheter shaft 2) has a guidewire port located adjacent the balloons.
8. The combination according to any of claims 1-7 wherein the burst pressure of the first balloon (6) is at least 5 atmospheres less than the burst pressure of the second balloon (8) .
9. The combination according to any of claims 1-8 wherein a length of the first balloon (6) is less than a length of the stent (14).
10. The combination according to any of claims 1-9 wherein a length of the second balloon (8) is greater than a length of the stent (14).
11. A method of implanting a stent, comprising: first expanding the central area of the stent (14) with a first balloon(6); bursting the first balloon (6); and then expanding the ends of the stent (14) with a second balloon(8) .
12. The method of claim 12 wherein said first balloon (6) comprises an inner balloon disposed inside said second balloon (8 ) which comprises an outer balloon.
13. The method of claim 11 or 12 comprising: mounting a stent (14) on a balloon catheter with the outer balloon(δ) overlaying the inner balloon(6), a burst pressure of the inner balloon (6) being substantially less than a burst pressure of the outer balloo (8); delivering the balloon catheter and stent (14) to a desired location in a vessel in a body; inflating the inner balloon (6) to a pressure sufficient to expand the stent (14); continuing inflating the inner balloon (6) to a pressure sufficient to burst the inner balloon prior to inflating said out balloon; inflating the outer balloon (8) to a pressure sufficient to implant the stent (14); and deflating and removing the balloon catheter.
14. The method according to claim 15, wherein said step of delivering comprises delivering over a guide wire.
15. The method according to claim 13 or 14, wherein the step of inflating the inner balloon (6) to a pressure sufficient to expand the stent implants the central portion of the stent and said step of inflating the outer balloon (8) to a pressure sufficient to implant the stent implants the ends of the stent.
16. The method according to any of claims 13-15, wherein a burst pressure of the outer balloon (8) is over approximately 10 atmospheres and a burst pressure of the inner balloon (6) is less than approximately 5 atmospheres.
17. The method according to any of claims 13-16, wherein the outer balloon (8) has a length longer than the stent (14) and the inner balloon (6) has a length shorter than the stent (14).
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2006202935A AU2006202935B2 (en) | 2000-06-14 | 2006-07-07 | Two balloon staged stent expansion |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US21164200P | 2000-06-14 | 2000-06-14 | |
US60/211,642 | 2000-06-14 | ||
PCT/IL2001/000543 WO2001095833A2 (en) | 2000-06-14 | 2001-06-13 | Two balloon catheter for staged stent expansion |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU2006202935A Division AU2006202935B2 (en) | 2000-06-14 | 2006-07-07 | Two balloon staged stent expansion |
Publications (2)
Publication Number | Publication Date |
---|---|
AU2001274463A1 true AU2001274463A1 (en) | 2002-03-14 |
AU2001274463B2 AU2001274463B2 (en) | 2006-04-06 |
Family
ID=22787777
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU7446301A Pending AU7446301A (en) | 2000-06-14 | 2001-06-13 | Two balloon staged stent expansion |
AU2001274463A Ceased AU2001274463B2 (en) | 2000-06-14 | 2001-06-13 | Two balloon catheter for staged stent expansion |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
AU7446301A Pending AU7446301A (en) | 2000-06-14 | 2001-06-13 | Two balloon staged stent expansion |
Country Status (18)
Country | Link |
---|---|
EP (1) | EP1289449B1 (en) |
JP (1) | JP3767555B2 (en) |
KR (1) | KR20020090242A (en) |
CN (1) | CN1436061A (en) |
AR (1) | AR032460A1 (en) |
AT (1) | ATE319389T1 (en) |
AU (2) | AU7446301A (en) |
BR (1) | BR0111023A (en) |
CA (1) | CA2410528C (en) |
CZ (1) | CZ20023912A3 (en) |
DE (2) | DE10196348T1 (en) |
EE (1) | EE200200662A (en) |
FI (1) | FI20022147A (en) |
IL (1) | IL143714A (en) |
NO (1) | NO20025998D0 (en) |
RU (1) | RU2002132903A (en) |
SK (1) | SK16932002A3 (en) |
WO (1) | WO2001095833A2 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6911038B2 (en) * | 2001-05-08 | 2005-06-28 | Scimed Life Systems, Inc. | Matched balloon to stent shortening |
US20050149110A1 (en) * | 2003-12-16 | 2005-07-07 | Wholey Mark H. | Vascular catheter with an expandable section and a distal tip for delivering a thromboembolic protection device and method of use |
CA2633854C (en) * | 2005-12-23 | 2015-05-19 | C.R. Bard Inc. | Balloon catheter with centralized vent hole |
WO2010030204A1 (en) * | 2008-09-12 | 2010-03-18 | Alexandr Grigorievich Viller | Dubble-balloon delivery system for an implantable eccentric stent |
JP2010183958A (en) * | 2009-02-10 | 2010-08-26 | Olympus Corp | Stent expansion device |
US9339384B2 (en) | 2011-07-27 | 2016-05-17 | Edwards Lifesciences Corporation | Delivery systems for prosthetic heart valve |
CN104105525A (en) * | 2011-12-02 | 2014-10-15 | 赛欧血管有限公司 | Balloon catheter system |
US9277905B2 (en) | 2012-08-02 | 2016-03-08 | W. L. Gore & Associates, Inc. | Space-filling device |
CN103385773B (en) * | 2013-07-25 | 2015-07-01 | 业聚医疗器械(深圳)有限公司 | Stent delivery system with saccules |
US9486347B2 (en) | 2013-12-18 | 2016-11-08 | Timothy A. M. Chuter | Balloon catheters and systems and methods for delivering stents using such catheters |
GB2538749B (en) * | 2015-05-27 | 2017-08-02 | Univ Dublin City | Inflatable balloon |
US20210330945A1 (en) * | 2020-04-24 | 2021-10-28 | Medtronic Vascular, Inc. | Nested Balloon Assembly |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4490421A (en) * | 1983-07-05 | 1984-12-25 | E. I. Du Pont De Nemours And Company | Balloon and manufacture thereof |
US5470313A (en) * | 1994-02-24 | 1995-11-28 | Cardiovascular Dynamics, Inc. | Variable diameter balloon dilatation catheter |
AU7513596A (en) * | 1995-06-02 | 1996-12-18 | Navius Corporation | Dual balloon stent delivery catheter |
JP3503417B2 (en) * | 1997-05-15 | 2004-03-08 | 鐘淵化学工業株式会社 | Balloon catheter and method of manufacturing balloon used therein |
DE19739086C1 (en) * | 1997-09-06 | 1999-07-15 | Voelker Wolfram Priv Doz Dr Me | Balloon catheter |
US5980531A (en) * | 1997-09-11 | 1999-11-09 | Schneider Inc | Stent deployment device with two balloons |
EP0920882A3 (en) * | 1997-12-04 | 2000-01-05 | Schneider Inc. | Balloon dilatation-drug delivery catheter and stent deployment-drug delivery catheter in rapid exchange configuration |
US6136011A (en) * | 1998-07-14 | 2000-10-24 | Advanced Cardiovascular Systems, Inc. | Stent delivery system and method of use |
-
2001
- 2001-06-12 IL IL143714A patent/IL143714A/en active IP Right Grant
- 2001-06-13 DE DE10196348T patent/DE10196348T1/en not_active Withdrawn
- 2001-06-13 EP EP01940977A patent/EP1289449B1/en not_active Expired - Lifetime
- 2001-06-13 AT AT01940977T patent/ATE319389T1/en not_active IP Right Cessation
- 2001-06-13 KR KR1020027015222A patent/KR20020090242A/en not_active Application Discontinuation
- 2001-06-13 DE DE60117791T patent/DE60117791T2/en not_active Expired - Lifetime
- 2001-06-13 CA CA002410528A patent/CA2410528C/en not_active Expired - Lifetime
- 2001-06-13 CN CN01811209A patent/CN1436061A/en active Pending
- 2001-06-13 AR ARP010102822A patent/AR032460A1/en unknown
- 2001-06-13 AU AU7446301A patent/AU7446301A/en active Pending
- 2001-06-13 EE EEP200200662A patent/EE200200662A/en unknown
- 2001-06-13 BR BR0111023-3A patent/BR0111023A/en not_active IP Right Cessation
- 2001-06-13 JP JP2002510018A patent/JP3767555B2/en not_active Expired - Fee Related
- 2001-06-13 RU RU2002132903/14A patent/RU2002132903A/en not_active Application Discontinuation
- 2001-06-13 AU AU2001274463A patent/AU2001274463B2/en not_active Ceased
- 2001-06-13 WO PCT/IL2001/000543 patent/WO2001095833A2/en active IP Right Grant
- 2001-06-13 CZ CZ20023912A patent/CZ20023912A3/en unknown
- 2001-06-13 SK SK1693-2002A patent/SK16932002A3/en unknown
-
2002
- 2002-12-04 FI FI20022147A patent/FI20022147A/en unknown
- 2002-12-13 NO NO20025998A patent/NO20025998D0/en not_active Application Discontinuation
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