Catheter assembly and method for treating bifurcations
First Claim
1. A stent delivery balloon catheter, comprising:
- a) an elongated shaft, havingi) a proximal section having a first inflation lumen;
ii) a bifurcated distal section having a first branch with a second inflation lumen within at least a portion thereof, and a second branch with a third inflation lumen within at least a portion thereof, the second and third inflation lumens each being in fluid communication with the first inflation lumen, the bifurcated distal section further having a secured portion along which the first and second branches are permanently secured together, and an unsecured portion proximally adjacent to the secured portion and along which the first and second branches are not secured together;
iii) an intermediate section joining the proximal and distal sections together, and having a fourth inflation lumen in fluid communication with the first, second, and third inflation lumens; and
iv) a joining wire lumen extending within the proximal section, the intermediate section, and the first branch, and a guidewire lumen extending within at least the intermediate section and the second branch; and
b) a first balloon on the first branch having an inflatable interior in fluid communication with the second inflation lumen, and a second balloon on the second branch having an inflatable interior in fluid communication with the third inflation lumen, and the inflatable interior of the first balloon and the inflatable interior of the second balloon are located distal to the secured portion of the bifurcated distal section;
c) a coupler secured to the second branch, located distal to the inflatable interior of the second balloon, and configured for releasably coupling the first and second branches together to form a coupled configuration;
d) a polymeric radiopaque distal tip marker surrounding a distal end section of the joining wire lumen, located distal to the inflatable interior of the first balloon, and formed of a blend of a polymeric material and radiopaque material; and
e) a stent releaseably mounted on the first and second balloons, located distal to the secured portion of the distal shaft section.
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Accused Products
Abstract
An improved stent design and stent delivery catheter assembly for repairing a main vessel and a side branch vessel forming a bifurcation. The stent includes rings aligned along a common longitudinal axis and connected by links, where the stent has one or more portals for aligning with and partially expanding into the opening to the side branch vessel. The stent is implanted at a bifurcation so that the main stent section is in the main vessel, and the portal section covers at least a portion of the opening to the side branch vessel. A second stent can be implanted in the side branch vessel and abut the expanded central section to provide full coverage of the bifurcated area in the main vessel and the side branch vessel. Radiopaque markers on the stent and on the tip of the delivery catheter assist in aligning the portal section with the opening to the side branch vessel.
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Citations
31 Claims
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1. A stent delivery balloon catheter, comprising:
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a) an elongated shaft, having i) a proximal section having a first inflation lumen; ii) a bifurcated distal section having a first branch with a second inflation lumen within at least a portion thereof, and a second branch with a third inflation lumen within at least a portion thereof, the second and third inflation lumens each being in fluid communication with the first inflation lumen, the bifurcated distal section further having a secured portion along which the first and second branches are permanently secured together, and an unsecured portion proximally adjacent to the secured portion and along which the first and second branches are not secured together; iii) an intermediate section joining the proximal and distal sections together, and having a fourth inflation lumen in fluid communication with the first, second, and third inflation lumens; and iv) a joining wire lumen extending within the proximal section, the intermediate section, and the first branch, and a guidewire lumen extending within at least the intermediate section and the second branch; and b) a first balloon on the first branch having an inflatable interior in fluid communication with the second inflation lumen, and a second balloon on the second branch having an inflatable interior in fluid communication with the third inflation lumen, and the inflatable interior of the first balloon and the inflatable interior of the second balloon are located distal to the secured portion of the bifurcated distal section; c) a coupler secured to the second branch, located distal to the inflatable interior of the second balloon, and configured for releasably coupling the first and second branches together to form a coupled configuration; d) a polymeric radiopaque distal tip marker surrounding a distal end section of the joining wire lumen, located distal to the inflatable interior of the first balloon, and formed of a blend of a polymeric material and radiopaque material; and e) a stent releaseably mounted on the first and second balloons, located distal to the secured portion of the distal shaft section. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18)
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19. A balloon catheter, comprising:
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a) an elongated catheter shaft having a branched distal section with a first and a second branch configured for releasably coupling together to form a coupled configuration, an inflation lumen, and a joining wire lumen extending at least within the first branch of the branched distal section; b) a first balloon on the first branch with an inflatable interior in fluid communication with the inflation lumen, and a second balloon on the second branch with an inflatable interior in fluid communication with the inflation lumen; and c) a polymeric radiopaque distal tip marker surrounding a distal end section of the joining wire lumen, located distal to the inflatable interior of the first balloon, and formed of a blend of a polymeric material and radiopaque material. - View Dependent Claims (20, 21, 22, 23, 24, 25, 26)
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27. A balloon catheter assembly, comprising:
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a) an elongated shaft, having i) a proximal section having a first inflation lumen; ii) a bifurcated distal section having a first branch with a second inflation lumen within at least a portion thereof, and a second branch with a third inflation lumen within at least a portion thereof, the second and third inflation lumens each being in fluid communication with the first inflation lumen, iii) an intermediate section joining the proximal and distal sections together, and having a fourth inflation lumen in fluid communication with the first, second, and third inflation lumens; and iv) a joining wire lumen extending within the proximal section, the intermediate section, and the first branch, and a guidewire lumen extending within at least the intermediate section and the second branch; and b) a first balloon on the first branch having an inflatable interior in fluid communication with the second inflation lumen, and a second balloon on the second branch having an inflatable interior in fluid communication with the third inflation lumen; c) a coupler secured to the second branch, located distal to the inflatable interior of the second balloon, and configured for releasably coupling the first and second branches together to form a coupled configuration; and d) a joining guidewire disposed within the joining wire lumen, and within a guidewire locking mechanism which is located proximal to the catheter shaft and which has a locked mode in which the catheter is releasably locked to the guidewire disposed within the joining wire lumen, and an unlocked mode in which the joining guidewire is slidably disposed within the joining wire lumen. - View Dependent Claims (28, 29, 30)
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31. A balloon catheter, comprising:
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a) an elongated shaft having an inflation lumen, and a guidewire lumen; b) a balloon on a distal shaft section with an interior in fluid communication with the inflation lumen; and c) a proximal adapter secured to a proximal end of the catheter shaft, having a port configured for connecting to a source of inflation fluid for inflating the balloon, and a guidewire locking mechanism having a locked mode in which the catheter is releasably locked to a guidewire disposed within the guidewire lumen, and an unlocked mode in which the guidewire is slidably disposed within the guidewire lumen, the guidewire locking mechanism comprising a guidewire locking torque handle which reversibly engages the guidewire disposed in the guidewire lumen to provide a finger hold for manipulating the guidewire, and which, in the locked mode, is releaseably connected to a proximal fitting at a proximal end of the proximal adapter.
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Specification