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Publication Number
US-12324756-B2
Publication Date
2025-06-10
Expiration Date
Abstract
A system for treating a bifurcation includes first and second delivery catheters, each having an expandable member and a stent. The stent on the second delivery catheter has a side hole. A portion of the first delivery catheter is disposed under a portion of the stent on second delivery catheter. The first delivery catheter is slidable relative to the second delivery catheter, and the first delivery catheter passes through the side hole.
Core Innovation
The invention relates to treating a bifurcated vessel, including a main branch vessel and a side branch vessel forming a bifurcation angle. A first delivery catheter and a second delivery catheter are provided, and each catheter has an elongate shaft with an expandable member coupled to a distal portion and a stent disposed over the expandable member. The stents have a collapsed configuration in which they are crimped on the expandable members and an expanded configuration in which they engage and support a vessel wall.
In one arrangement, the first stent is disposed into the side branch vessel and the second stent is disposed into the main branch vessel, and the bifurcation angle is less than 60-70 degrees. In another arrangement, the first stent is disposed into the main branch vessel and the second stent is disposed into the side branch vessel, and the bifurcation angle is greater than 60-70 degrees. The second expandable member has a working length with a proximal portion and a distal portion, and in the collapsed configuration the second stent is crimped leaving the proximal portion uncovered.
The method includes proximally retracting the first elongate shaft under a portion of the second stent in the collapsed configuration until a proximal end of the first stent is aligned with a side hole in the second stent. The first expandable member is then radially expanded to expand the first stent, and the second expandable member is radially expanded to expand the second stent, with the second expandable member distal to the first before and during delivery.
Claims Coverage
The independent claims cover three inventive features: bifurcated-vessel treatment with two delivery catheters carrying stents on expandable members, bifurcation-angle dependent main/side branch stent placement, and proximal retraction for alignment with a side hole in the other stent followed by radial expansion.
Two-catheter bifurcated-vessel stent expansion with side-hole alignment
Advancing a first and second delivery catheter toward a bifurcation in a blood vessel; disposing the first stent into the side branch vessel and the second stent into the main branch vessel; proximally retracting the first elongate shaft under a portion of the second stent in the collapsed configuration until a proximal end of the first stent is aligned with a side hole in the second stent; and radially expanding the first and second expandable members to expand the first and second stents into engagement with a vessel wall, with the second expandable member distal to the first before and during delivery.
Bifurcation-angle dependent main/side branch stent placement
Advancing the first and second delivery catheters toward a bifurcation in a blood vessel where the main branch vessel and the side branch vessel form a bifurcation angle of greater than 60-70 degrees; advancing comprises disposing the first stent into the main branch vessel and disposing the second stent into the side branch vessel; proximally retracting the first elongate shaft under a portion of the second stent in the collapsed configuration until a proximal end of the first stent is aligned with a side hole in the second stent; and radially expanding the first and second expandable members such that the first and second stents engage and support the vessel wall, with the second expandable member distal to the first before and during delivery.
Catheter system with first and second expandable members and dual stents
Providing a system including a first delivery catheter having a first elongate shaft, a first expandable member coupled to a distal portion, and a first stent over the first expandable member with collapsed and expanded configurations; and providing a second delivery catheter having a second elongate shaft, a second expandable member coupled to a distal portion and distal to the first expandable member, and a second stent over the second expandable member with collapsed and expanded configurations, wherein in the collapsed configuration the second stent is crimped on the second expandable member leaving a proximal portion of the working length uncovered, and in the expanded configuration the second stent engages and supports a vessel wall.
The claimed coverage centers on simultaneous bifurcation treatment using two delivery catheters with stents on expandable members, proximal retraction to align a stent proximal end with a side hole in the other stent, and radial expansion of both expandable members to engage and support vessel walls, with main/side branch stent placement constrained by bifurcation-angle ranges.
Stated Advantages
Not explicitly described in patent.
Documented Applications
Not explicitly described in patent.
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