Bifurcated endovascular prosthesis having tethered contralateral leg
Inventors
Aristizabal, Diego • Chobotov, Michael V.
Assignees
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Publication Number
US-11779479-B2
Publication Date
2023-10-10
Expiration Date
Abstract
An endovascular delivery system includes a bifurcated and inflatable prosthesis including a main tubular body having an open end and opposed ipsilateral and contralateral legs defining a graft wall therein between. A tether is disposed securably disposed to the contralateral leg, and the contralateral leg is releasably restrained towards the ipsilateral leg tether to prevent undesirable movement of the contralateral leg. A release wire within the endovascular delivery system releasably retains the tether near the ipsilateral leg.
Core Innovation
The invention relates to an endovascular prosthesis system having a main tubular body with an ipsilateral leg and a contralateral leg. A graft material extends between the ipsilateral leg and the contralateral leg across a bifurcation point, with a distal ipsilateral leg portion and a distal contralateral leg portion. The graft material restrains movement of the contralateral leg with respect to the ipsilateral leg while being configured to increase in a direction from the bifurcation point toward the distal portions.
The described restraint addresses undesirable longitudinal bunching and rotational misalignment during deployment by restraining the contralateral leg toward the ipsilateral leg. The system further includes constraints that restrict significant rotational movement to prevent misalignment within a bodily lumen, and the distal behavior differs from the proximal behavior, where distal portions have more independent mobility than proximal portions near the bifurcation point.
Alternative restraint mechanisms are disclosed, including a web of biocompatible material extending between the legs. In one described geometry, the web is triangular-shaped, and the graft material can include multiple connections with shaped geometry and weakened portions having a tear line, configured to allow separation of one portion of the graft material from another portion and to enable separation or increased independence of distal leg portions.
Claims Coverage
The document identifies three independent claims for systems that restrain relative movement between an ipsilateral leg and a contralateral leg. Across these claims, the coverage is grounded in three inventive features: a graft-material restraint with a distal-to-proximal increasing configuration, a triangular-shaped biocompatible web restraint, and a graft-material restraint with multiple inter-leg connections where at least one connection has a weakened portion allowing separation.
Graft material restrains contralateral movement with distal increase
A main tubular body includes a bifurcation point between an ipsilateral leg and a contralateral leg, and graft material extending between the ipsilateral leg and the contralateral leg. The graft material restrains movement of the contralateral leg with respect to the ipsilateral leg and increases in a direction extending from the bifurcation point to the distal ipsilateral leg portion or distal contralateral leg portion.
Triangular-shaped biocompatible web restrains contralateral movement
A web of biocompatible material extends between the ipsilateral leg and the contralateral leg, and the web restrains movement of the contralateral leg with respect to the ipsilateral leg, where the web of biocompatible material is triangular-shaped.
Graft material with plurality of connections including a weakened connection portion
Graft material extending between the ipsilateral leg and the contralateral leg restrains movement of the contralateral leg with respect to the ipsilateral leg. The graft material comprises a plurality of connections between the ipsilateral leg and the contralateral leg, and at least one of the plurality of connections comprise a weakened portion configured to allow separation of one portion of the graft material from another portion of the graft material.
Collectively, the independent claims cover restraining relative movement between contralateral and ipsilateral legs using graft material with a distal-increasing configuration, a triangular-shaped biocompatible web, and graft material having multiple connections where at least one connection includes a weakened portion permitting separation.
Stated Advantages
Prevention of undesirable longitudinal bunching during deployment.
Prevention of rotational misalignment during deployment.
Restriction of significant rotational movement to prevent misalignment within a bodily lumen.
Increased distal independence of the legs compared to proximal portions near the bifurcation point.
Documented Applications
Used as an endovascular prosthesis system configured to restrain relative movement between an ipsilateral leg and a contralateral leg during deployment within a bodily lumen.
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