Controllable retriever with distal clot anchor
Inventors
Friedman, Aharon • Gedulter, Matan • Miller, Moshe
Assignees
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Publication Number
US-11980380-B2
Publication Date
2024-05-14
Expiration Date
Abstract
An intraluminal device may be provided including an elongated structure formed of a plurality of wires. The intraluminal device may include at least one expandable mesh segment configured to engage an obstruction in a body lumen, wherein the plurality of wires may be arranged into sets of looped wires that overlap to form the expandable mesh segment. The intraluminal device may also include at least one clot anchoring segment that may be configured to trap the obstruction to prevent downstream movement of the obstruction relative to the intraluminal device.
Core Innovation
The disclosed intraluminal device includes an elongated structure formed of a plurality of wires extending from a proximal end to a distal end. In a first region, the plurality of wires is twisted within the first region to form a shaft, and in a second region adjacent to the first region, the plurality of wires is woven within the second region to form a scaffold.
A third region distally from the second region includes a plurality of sets of looped wires that cooperate to form a clot capturing area, where the clot capturing area includes at least two strand configurations or at least two braiding configurations. Within the third region, at least one set of looped wires cooperates with at least one other set of looped wires to form at least one expandable mesh segment configured to engage an obstruction within a body lumen.
A first set of looped wires intertwines with a second set of looped wires within the third region to define a junction structure, with a weaving arrangement such that a first wire of the first set is situated between two wires of the second set and a second wire of the second set is situated between two wires of the first set. The junction structure provides structural support to maintain a strand configuration of one or more of the first set and second set when an opening force is exerted.
The scaffold in the second region supports openings between the sets of looped wires in the at least one expandable mesh segment, and a fourth region distally from the third region includes a distal filter woven from the plurality of sets of looped wires. The plurality of wires is arranged to form at least one clot anchoring segment in the fourth region, where the clot anchoring segment traps the obstruction to prevent downstream movement of the obstruction relative to the elongated structure.
Claims Coverage
Independent claim clm-00001 defines a wire-based intraluminal device with four regions: a twisted shaft, a woven scaffold, a looped-wire clot capturing area forming expandable mesh segments with junction weaving, and a distal woven filter with clot anchoring segments. The provided summary also references dependent claims with refinements about control-wire architecture, radial expansion behavior, and geometric constraints for mesh and pores or openings.
Four-region wire-based intraluminal device with twisted shaft and woven scaffold
An intraluminal device including an elongated structure formed of a plurality of wires extending from the proximal end to the distal end, wherein a first region twisted within the first region forms a shaft and a second region woven within the second region forms a scaffold adjacent to the first region.
Looped-wire clot capturing area with multiple strand or braiding configurations
A third region situated distally from the second region, the third region including a plurality of sets of looped wires that cooperate to form a clot capturing area, wherein the clot capturing area includes at least two strand configurations or at least two braiding configurations.
Expandable mesh segment engagement using cooperating looped-wire sets
At least one set of looped wires cooperates with at least one other set of looped wires in the third region to form at least one expandable mesh segment configured to engage an obstruction within a body lumen.
Junction structure interweaving that maintains strand configuration under opening force
A junction structure defined by intertwining a first set of looped wires with a second set of looped wires within the third region, the junction structure configured such that when an opening force is exerted, the junction structure provides structural support to maintain a strand configuration of one or more of the first set and second set.
Clot anchoring segment trapping to prevent downstream movement
At least one clot anchoring segment in the fourth region configured to trap the obstruction to prevent downstream movement of the obstruction relative to the elongated structure.
The claim set centers on a wire-based intraluminal device having a twisted shaft, a woven scaffold, and a distal looped-wire clot capturing area that forms expandable mesh segments via cooperative braiding, with a junction structure that maintains strand configuration under opening forces. A distal woven filter and clot anchoring segment are included so the device traps an obstruction and prevents downstream movement.
Stated Advantages
Traps the obstruction to prevent downstream movement of the obstruction relative to the elongated structure.
Documented Applications
Intraluminal clot retrieval by engaging an obstruction within a body lumen using an expandable mesh segment and trapping the obstruction with a clot anchoring segment.
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