Tissue ligation devices and methods therefor
First Claim
Patent Images
1. A device for closing a target tissue comprising:
- an elongate body;
a snare loop assembly extending at least partially from the elongate body, wherein the snare loop assembly comprises a snare comprising a snare loop and a suture loop releasably attached to the snare, wherein the snare comprises a first end and a second end, and wherein advancement of the first end of the snare relative to the elongate body increases the diameter of the snare loop and wherein retraction of the first end of the snare relative to the elongate body decreases the diameter of the snare loop;
a shuttle, wherein the second end of the snare is connected to the shuttle; and
a locking element, wherein the locking element is configured to releasably couple the shuttle to the elongate body and is further configured to release the shuttle from the elongate body, and wherein when the shuttle is released, the first and second ends of the snare are spaced apart.
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Abstract
Described here are closure devices and methods for ligating tissue, such as the left atrial appendage. The closure devices may comprise a snare loop assembly comprising a snare and a suture loop releasably attached thereto. The snare may be releasable from an elongate body of the closure device. In some instances, the closure device may comprise one or more markers to allow a user to determine whether the snare loop assembly is twisted.
370 Citations
24 Claims
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1. A device for closing a target tissue comprising:
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an elongate body; a snare loop assembly extending at least partially from the elongate body, wherein the snare loop assembly comprises a snare comprising a snare loop and a suture loop releasably attached to the snare, wherein the snare comprises a first end and a second end, and wherein advancement of the first end of the snare relative to the elongate body increases the diameter of the snare loop and wherein retraction of the first end of the snare relative to the elongate body decreases the diameter of the snare loop; a shuttle, wherein the second end of the snare is connected to the shuttle; and a locking element, wherein the locking element is configured to releasably couple the shuttle to the elongate body and is further configured to release the shuttle from the elongate body, and wherein when the shuttle is released, the first and second ends of the snare are spaced apart. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 13, 14)
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11. The device of 10 wherein the locking element comprises a lock wire, and wherein the snare release is configured to retract the lock wire.
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15. A device for closing a target tissue comprising:
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an elongate body; a snare loop assembly extending at least partially from the elongate body, wherein the snare loop assembly comprises a snare comprising a snare loop and a suture loop releasably attached to the snare, wherein the snare comprises a proximal snare portion and a distal snare portion, each comprising an engagement portion, and wherein the engagement portion of the proximal snare portion is configured to releasably engage the engagement portion of the distal snare portion; and a restraining sheath positioned to maintain engagement of the proximal and distal snare portions, and wherein when the restraining sheath is withdrawn, the proximal and distal snare portions are spaced apart. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification