Articulating retrieval devices
First Claim
Patent Images
1. A medical device for removing an obstruction from a blood vessel, the medical device comprising:
- a main bundle comprising a group of wires, the main bundle having a first end and a second end; and
a capturing portion formed by the group of wires diverging from the second end of the main bundle, where the group of wires are interwoven to form a capturing surface that defines an axially extending cavity extending between an open proximal end and a permeable distal end that is generally aligned with the second end of the main bundle along a longitudinal axis of the medical device,wherein the group of wires diverge in a distal direction at the second end of the main bundle to form the permeable distal end, then extend proximally back to form the open proximal end, where at the open proximal end the group of wires evert and extend distally towards the permeable distal end along the capturing surface, such that the distally extending wires are interwoven with the proximally extending wires to form the capturing surface between the permeable distal end and the open proximal end, and wherein articulation of the capturing portion relative to the main bundle does not cause the open proximal end to reduce in size, andwherein the interwoven group of wires is configured to provide a coverage density that increases along a length of the axially extending cavity.
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Accused Products
Abstract
The devices and methods described herein relate to improved structures for removing obstructions from body lumens. Such devices have applicability in through-out the body, including clearing of blockages within the vasculature, by addressing the frictional resistance on the obstruction prior to attempting to translate and/or mobilize the obstruction within the body lumen.
236 Citations
32 Claims
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1. A medical device for removing an obstruction from a blood vessel, the medical device comprising:
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a main bundle comprising a group of wires, the main bundle having a first end and a second end; and a capturing portion formed by the group of wires diverging from the second end of the main bundle, where the group of wires are interwoven to form a capturing surface that defines an axially extending cavity extending between an open proximal end and a permeable distal end that is generally aligned with the second end of the main bundle along a longitudinal axis of the medical device, wherein the group of wires diverge in a distal direction at the second end of the main bundle to form the permeable distal end, then extend proximally back to form the open proximal end, where at the open proximal end the group of wires evert and extend distally towards the permeable distal end along the capturing surface, such that the distally extending wires are interwoven with the proximally extending wires to form the capturing surface between the permeable distal end and the open proximal end, and wherein articulation of the capturing portion relative to the main bundle does not cause the open proximal end to reduce in size, and wherein the interwoven group of wires is configured to provide a coverage density that increases along a length of the axially extending cavity. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A medical device for removing an obstruction from a blood vessel, the medical device comprising:
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a capturing portion formed by a plurality of traversing wires that interweave such that at least some of the plurality of wires cross one another along the capturing portion, the capturing portion having an open proximal end, a permeable distal end, and a capturing surface extending between the open proximal end and the permeable distal end, the capturing surface also defining an axially extending cavity configured to surround the obstruction when located therein, wherein the plurality of traversing wires comprises proximally extending wires that extend proximally from the permeable distal end to the open proximal end and distally extending wires that extend distally from the open proximal end towards the permeable distal end, wherein the proximally extending wires and the distally extending wires and interwoven to form the capturing surface, wherein the traversing wires leave from the capturing surface at a location distal to the open proximal end and converge to form a main bundle that extends through the axially extending cavity of the capturing portion and out of the open proximal end such that articulation of the capturing portion relative to the main bundle does not reduce a profile of the open proximal end, and wherein the traversing wires are joined along a length of the main bundle such that the traversing wires do not separate along the main bundle.
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32. A medical device for removing an obstruction from a blood vessel, the medical device comprising:
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a main bundle comprising a group of wires having a first end and a second end where the group of wires diverge, wherein the group of wires are joined between the first and second end of the main bundle such that the group of wires do not separate along the main bundle; and a capturing portion having an open proximal end, a permeable distal end, and a capturing surface extending therebetween that surrounds an axially extending cavity, wherein the capturing portion is formed as the diverging group of wires extend proximally from the permeable distal end toward the open proximal end, then evert and extend distally from the open proximal end toward the permeable distal end, wherein the proximally extending wires and the distally extending wires interweave to form the capturing surface, wherein at least a portion of the wires cross one another along the capturing surface, wherein articulation of the capturing portion relative to the main bundle does not cause the open proximal end to reduce in size.
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Specification