System and method to radially constrict a stent graft
Inventors
Assignees
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Publication Number
US-12171651-B2
Publication Date
2024-12-24
Expiration Date
Abstract
A stent graft system including a component having longitudinally extending outer surface and inner surface, the inner surface defining a lumen having a longitudinal axis, a plurality of stents distributed longitudinally along the component, and a plurality of suture loops, each suture loop attached to the inner outer surface, of the stent graft, a first suture loop spaced laterally and longitudinally relative to an adjacent suture loop when the component is in an expanded configuration, the plurality of suture loops aligned longitudinally along the stent graft when the stent graft is in a radially constricted configuration, at least one ligature having a proximal end and a distal end, the ligature extending through at least some of the plurality of suture loops, whereby tension on the at least one ligature longitudinally aligns the suture loops along the longitudinal axis of the component, thereby at least partially radially constricting the stent graft.
Core Innovation
The invention describes a stent graft system for endovascular repair in aortic aneurysms. The system includes a stent graft having a component defining a longitudinally extending outer surface and a longitudinally extending inner surface, with the inner surface defining a lumen having a longitudinal axis, and a plurality of stents distributed longitudinally along the component.
The system further includes a plurality of suture loops spaced laterally and longitudinally relative to an adjacent suture loop along a stent of the plurality of stents, when the component is in an expanded configuration. At least one ligature has a proximal end and a distal end, and extends through a first suture loop and laterally through an adjacent suture loop when the component is in an expanded configuration.
The configuration of the suture loops together with at least one proximal-distal ligature longitudinally aligns the suture loops along the component lumen axis in a radially constricted configuration. When ligature tension is reduced or released relative to the suture loops, the stent graft selectively or progressively collapses or expands, enabling controlled deployment and rotation with reduced risk of injury or shape distortion.
The described embodiments include ligature(s) arranged with outside or inside loop locations, multiple independent ligatures for proximal versus distal control, rigid or flexible ligatures, and optional fenestrations for branch vessel alignment. Delivery and release are described via an introducer sheath and handles, including embodiments suitable for thoracic aortic aneurysm, abdominal aortic aneurysm, thoracoabdominal aortic aneurysm, juxtarenal aneurysm, and short-neck abdominal aneurysm.
Claims Coverage
The independent claim includes a stent graft system with longitudinally distributed stents, longitudinally spaced suture loops, and at least one ligature extending through a first suture loop and laterally through an adjacent suture loop in an expanded configuration. Dependent claims add ligature-tension alignment, independent proximal versus distal control, radially self-expanding behavior when constrained, suture loops extending around less than the full circumference, and a fenestration defined by the component.
Longitudinally extending component with lumen axis
A stent graft system including a component defining a longitudinally extending outer surface and a longitudinally extending inner surface, the inner surface defining a lumen having a longitudinal axis.
Plurality of stents distributed longitudinally along the component
A stent graft system including a plurality of stents distributed longitudinally along the component.
Plurality of suture loops spaced laterally and longitudinally on adjacent stents
A stent graft system including a plurality of suture loops with a first suture loop spaced both laterally and longitudinally relative to an adjacent suture loop along a first stent when the component is in an expanded configuration.
Ligature extending through a first suture loop and laterally through an adjacent suture loop
A stent graft system including at least one ligature having a proximal end and a distal end, the at least one ligature extending through the first suture loop and laterally through the adjacent suture loop when the component is in an expanded configuration.
Ligature tension aligning suture loops along the longitudinal axis to partially radially constrict
The stent graft system uses ligatures whose longitudinal tension aligns suture loops along the component’s longitudinal axis to at least partially radially constrict the stent graft.
Independent ligature tension for proximal and distal radial expansion
A plurality of ligatures arranged through proximal and distal portions of suture loops so that independent tension on each ligature controls radial expansion of the plurality of stents at the corresponding proximal and distal regions.
Radially constricted stents that are radially self-expanding
A plurality of stents that, when radially constricted by at least one ligature, are radially self-expanding.
Suture loops extending around less than the full circumference
Multiple suture loops extending around less than the full circumference of the stent graft.
Fenestration defined by the component
A component that defines a fenestration.
Overall, the claim set covers a longitudinally oriented stent graft system that employs longitudinally distributed suture loops connected by a proximal-distal ligature path extending through a first suture loop and laterally through an adjacent suture loop in an expanded configuration. Dependent features add ligature-tension alignment along the lumen axis, independent proximal versus distal control of radial expansion via multiple ligatures, and constraints including radially self-expanding stents upon radial constriction, partial circumference coverage by the suture loops, and a fenestration defined by the component.
Stated Advantages
Controlled deployment and rotation enabled by selective or progressive collapse or expansion when ligature tension is reduced or released.
Reduced risk of injury or shape distortion during deployment and rotation when ligature tension is reduced or released.
At least partially radially constricting stents using ligatures aligned with suture loops along the component longitudinal axis.
Documented Applications
Endovascular repair in aortic aneurysms, including thoracic aortic aneurysm, abdominal aortic aneurysm, thoracoabdominal aortic aneurysm, juxtarenal aneurysm, and short-neck abdominal aneurysm.
Branch vessel alignment using optional fenestrations and a branch prosthesis context.
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