Multi-stent and multi-balloon apparatus for treating bifurcations and methods of use
Inventors
Assignees
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Publication Number
US-12053400-B2
Publication Date
2024-08-06
Expiration Date
Abstract
A system for treating a bifurcated vessel that includes a first delivery catheter and a second delivery catheter. The first delivery catheter carries a proximal first stent and a distal second stent. The first delivery catheter also has a first elongate shaft, a proximal first expandable member with the proximal first stent disposed thereover, and a distal second expandable member with the distal second stent disposed thereover. The proximal first expandable member and distal second expandable member are independently expandable of one another. The second delivery catheter carries a third stent. The second delivery catheter also has a second elongate shaft, and a third expandable member with the third stent disposed thereover. The third expandable member is independently expandable of the proximal first expandable member and the distal second expandable member.
Core Innovation
The invention provides a system for treating a trifurcated vessel using a nested catheter arrangement. A first main elongate shaft carries a first main stent on a first main expandable member adjacent the distal end, and a second main elongate shaft carries a second main stent on a second main expandable member, with the second main elongate shaft disposed in the first main elongate shaft.
The system further includes a first side branch elongate shaft disposed in the first main elongate shaft, with a first side branch stent disposed on a first side branch expandable member adjacent the distal end, and a second side branch elongate shaft also disposed in the first main elongate shaft, with a second side branch stent disposed on a second side branch expandable member adjacent the distal end. The disclosed arrangement concept extends bifurcation stenting to trifurcations by using independently expandable expandable members to enable side-branch stent deployment.
The disclosed deployment concept includes relative positioning at a bifurcation using radiopaque markers, guidewire lumens, and optionally an axially slidable catheter relationship. For bifurcation embodiments, main-branch stents form a side hole via abutting notched regions to allow passage of a second catheter, enabling deployment of a side-branch stent and kissing inflation to improve coverage.
Claims Coverage
The document provides one independent claim directed to a system for treating a trifurcated vessel, with dependent refinements that specify the nested catheter disposition, relative sliding behavior for side-branch deployment, balloon-type expandable members, lumen relationships, and an axial distal/proximal ordering of main expandable members.
Nested main shafts for trifurcation treatment
A system for treating a trifurcated vessel comprising a first main elongate shaft having a proximal end, a distal end, a first main expandable member adjacent the distal end thereof, and a first main stent disposed on the first main expandable member; and a second main elongate shaft having a proximal end, a distal end, a second main expandable member adjacent the distal end thereof, and a second main stent disposed on the second main expandable member, wherein the second main elongate shaft is disposed in the first main elongate shaft.
Nested side-branch shafts within the first main shaft
A system wherein a first side branch elongate shaft having a proximal end, a distal end, a first side branch expandable member adjacent the distal end thereof, and a first side branch stent disposed on the first side branch expandable member is disposed in the first main elongate shaft; and a second side branch elongate shaft having a proximal end, a distal end, a second side branch expandable member adjacent the distal end thereof, and a second side branch stent disposed on the second side branch expandable member is disposed in the first main elongate shaft.
Slidably disposed second main elongate shaft
The system wherein the second main elongate shaft is slidably disposed in the first main elongate shaft.
Sliding advancement to move a side-branch stent between main stents
The system wherein the first side branch elongate shaft is slidably disposed in a first main elongate shaft, such that sliding advancement moves the first side-branch stent out of the first main elongate shaft and into position between the first main stent and the second main stent.
Balloon expandable members for main and side branches
The system wherein one or more of the first main expandable member, second main expandable member, first side branch expandable member, and second side branch expandable member is a balloon.
Lumen extending through first main shaft with slidably disposed second main shaft
The system wherein the first main elongate shaft has a first lumen extending therethrough, and the second main elongate shaft is slidably disposed in the first lumen.
Axial ordering of main expandable members with distal second main expandable member
The system wherein the second main expandable member is located distally relative to the first main expandable member.
Overall, the claim coverage centers on a trifurcated-vessel stent system using nested main and side-branch elongate shafts, with dependent refinements specifying slidably disposed shafts for side-branch stent placement between main stents, balloon-type expandable members, a lumen enabling slidably disposed nested shafts, and a distal ordering of the second main expandable member relative to the first.
Stated Advantages
Improve coverage via side-branch deployment and kissing inflation.
Documented Applications
Treating a trifurcated vessel using a system with first and second main elongate shafts and side-branch elongate shafts disposed within a first main elongate shaft.
Bifurcation stenting embodiments using independently expandable expandable members, main-branch stents forming a side hole for passage of a second catheter, and kissing inflation to improve coverage.
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