Stent system with radial-expansion locking
First Claim
1. A method for treating a blood vessel suffering from an aneurysm or a dissection, the method comprising:
- advancing an inner shaft of a deployment system through a body lumen of a subject to the blood vessel, while the inner shaft is removably disposed in a self-expanding stent-graft that is shaped so as to define one or more lateral fenestrations, wherein the inner shaft is shaped so as to define one or more conduits therealong, which conduits are not coaxial with the inner shaft, wherein advancing comprises advancing the inner shaft while one or more restraining wires of the deployment system (a) are at least partially removably disposed in the conduits, and (b) prevent full radial expansion of one or more longitudinal portions of the self-expanding stent-graft by physically engaging the one or more longitudinal portions of the self-expanding stent-graft;
introducing one or more guidewires into a proximal end of the self-expanding stent-graft, out of the one or more lateral fenestrations, respectively, and into one or more branching blood vessels, respectively, wherein the one or more branching blood vessels branch from the blood vessel;
aligning the one or more fenestrations with respective ostia of the one or more branching arteries;
after aligning the one or more fenestrations, at least partially withdrawing the one or more restraining wires, such that the one or more restraining wires do not prevent the full radial expansion of the one or more longitudinal portions of the self-expanding stent-graft;
introducing one or more branching stent-grafts over the one or more guidewires, respectively, into the proximal end of the self-expanding stent-graft, out of the one or more lateral fenestrations, respectively, and into the one or more branching blood vessels, respectively; and
radially expanding the one or more branching stent-grafts so that the one or more branching stent-grafts form respective blood-tight seals with the one or more lateral fenestrations, respectively,wherein the one or more restraining wires include first and second restraining wires, and the one or more longitudinal portions of the self-expanding stent-graft include first and second longitudinal portions of the self-expanding stent-graft,wherein advancing the inner shaft comprises advancing the inner shaft while;
the inner shaft is removably disposed in the self-expanding stent-graft,the first restraining wire (a) physically engages the first longitudinal portion of the self-expanding stent-graft, thereby preventing full radial expansion of the first longitudinal portion, and (b) does not engage the second longitudinal portion of the self-expanding stent-graft, which second longitudinal portion does not longitudinally overlap the first longitudinal portion, andthe second restraining wire (a) physically engages the second longitudinal portion of the self-expanding stent-graft, thereby preventing full radial expansion of the second longitudinal portion, and (b) does not engage the first longitudinal portion of the self-expanding stent-graft,wherein at least partially withdrawing the one or more restraining wires comprises at least partially withdrawing the first restraining wire,wherein the method further comprises;
after at least partially withdrawing the first restraining wire, adjusting a disposition of the second longitudinal portion of the self-expanding stent-graft; and
thereafter, at least partially withdrawing the second restraining wire, andwherein the deployment system further includes a control handle, which (a) includes a withdrawal actuator, which includes a spool to which a proximal portion of a spool-coupled restraining wire is coupled, and (b) is shaped so as to define one or more lumens open to an external surface of the control handle, through which lumen an externally-accessible restraining wire passes, wherein the spool-coupled restraining wire is one of the first and the second restraining wires and the externally-accessible restraining wire is the other of the first and the second restraining wires,wherein at least partially withdrawing the first and the second restraining wires comprises rotating the spool to at least partially withdraw the spool-coupled restraining wire in a proximal direction, and pulling on the externally-accessible restraining wire from outside the control handle.
1 Assignment
0 Petitions
Accused Products
Abstract
A deployment system (10, 410) includes an inner shaft (36, 436), removably disposed in a self-expanding stent-graft (40), and shaped so as to define (a) at least one conduit therealong (50, 450), which is (i) not coaxial with the inner shaft (36, 436), and (ii) shaped so as to define at least first (52, 452) and second enclosed longitudinal segments (54, 454), and (b) a restraining longitudinal portion (56, 456) that is longitudinally disposed between the first (52, 452) and second enclosed longitudinal segments (54, 454). The deployment system (10, 410) is configured such that (a) when a restraining wire (60, 460) thereof is removably disposed in the first (52, 452) and second enclosed longitudinal segments (54, 454), a portion (62, 463) of the restraining wire (60, 460) disposed alongside the restraining longitudinal portion (56, 456) prevents full radial expansion of a longitudinal portion (70, 470) of the stent-graft (40) by physically engaging the stent-graft longitudinal portion (70, 470), and (b) when the restraining wire (60, 460) has been withdrawn from at least the first enclosed longitudinal segment (52, 452), the restraining wire (60, 460) does not prevent the full radial expansion of the stent-graft longitudinal portion (70, 470).
633 Citations
11 Claims
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1. A method for treating a blood vessel suffering from an aneurysm or a dissection, the method comprising:
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advancing an inner shaft of a deployment system through a body lumen of a subject to the blood vessel, while the inner shaft is removably disposed in a self-expanding stent-graft that is shaped so as to define one or more lateral fenestrations, wherein the inner shaft is shaped so as to define one or more conduits therealong, which conduits are not coaxial with the inner shaft, wherein advancing comprises advancing the inner shaft while one or more restraining wires of the deployment system (a) are at least partially removably disposed in the conduits, and (b) prevent full radial expansion of one or more longitudinal portions of the self-expanding stent-graft by physically engaging the one or more longitudinal portions of the self-expanding stent-graft; introducing one or more guidewires into a proximal end of the self-expanding stent-graft, out of the one or more lateral fenestrations, respectively, and into one or more branching blood vessels, respectively, wherein the one or more branching blood vessels branch from the blood vessel; aligning the one or more fenestrations with respective ostia of the one or more branching arteries; after aligning the one or more fenestrations, at least partially withdrawing the one or more restraining wires, such that the one or more restraining wires do not prevent the full radial expansion of the one or more longitudinal portions of the self-expanding stent-graft; introducing one or more branching stent-grafts over the one or more guidewires, respectively, into the proximal end of the self-expanding stent-graft, out of the one or more lateral fenestrations, respectively, and into the one or more branching blood vessels, respectively; and radially expanding the one or more branching stent-grafts so that the one or more branching stent-grafts form respective blood-tight seals with the one or more lateral fenestrations, respectively, wherein the one or more restraining wires include first and second restraining wires, and the one or more longitudinal portions of the self-expanding stent-graft include first and second longitudinal portions of the self-expanding stent-graft, wherein advancing the inner shaft comprises advancing the inner shaft while; the inner shaft is removably disposed in the self-expanding stent-graft, the first restraining wire (a) physically engages the first longitudinal portion of the self-expanding stent-graft, thereby preventing full radial expansion of the first longitudinal portion, and (b) does not engage the second longitudinal portion of the self-expanding stent-graft, which second longitudinal portion does not longitudinally overlap the first longitudinal portion, and the second restraining wire (a) physically engages the second longitudinal portion of the self-expanding stent-graft, thereby preventing full radial expansion of the second longitudinal portion, and (b) does not engage the first longitudinal portion of the self-expanding stent-graft, wherein at least partially withdrawing the one or more restraining wires comprises at least partially withdrawing the first restraining wire, wherein the method further comprises; after at least partially withdrawing the first restraining wire, adjusting a disposition of the second longitudinal portion of the self-expanding stent-graft; and thereafter, at least partially withdrawing the second restraining wire, and wherein the deployment system further includes a control handle, which (a) includes a withdrawal actuator, which includes a spool to which a proximal portion of a spool-coupled restraining wire is coupled, and (b) is shaped so as to define one or more lumens open to an external surface of the control handle, through which lumen an externally-accessible restraining wire passes, wherein the spool-coupled restraining wire is one of the first and the second restraining wires and the externally-accessible restraining wire is the other of the first and the second restraining wires, wherein at least partially withdrawing the first and the second restraining wires comprises rotating the spool to at least partially withdraw the spool-coupled restraining wire in a proximal direction, and pulling on the externally-accessible restraining wire from outside the control handle. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification