Securing element for resheathing an intravascular device and associated systems and methods
First Claim
1. A retrieval device deployable through a delivery sheath, the device comprising:
- an elongated shaft;
a retrieval structure coupled to a distal zone of the elongated shaft, the retrieval structure including a capture structure and a cover having (a) a first portion coupled to the distal zone of the elongated shaft at a location proximal of the capture structure and (b) a free second portion, wherein, in a delivery state, the second portion of the cover extends proximally from the first portion; and
a securing element coupled to the elongated shaft proximal to the first portion of the cover,wherein, when the cover is in the delivery state and at least a portion of the cover and at least a portion of the securing element are positioned within the delivery sheath, moving the retrieval device proximally increases an outward force exerted by the securing element against at least a portion of the cover and an inner surface of the delivery sheath, thereby inhibiting movement of the second portion of the cover relative to the elongated shaft.
1 Assignment
0 Petitions
Accused Products
Abstract
Devices and methods for securing a cover of a retrieval device while the retrieval device is resheathed to a more proximal position within a delivery sheath are disclosed herein. A retrieval device may include, for example, a securing element configured to grip the cover when the retrieval device is pulled proximally, to thereby secure the cover. A method of positioning the retrieval device may include, for example: (a) advancing the retrieval device distally through a delivery sheath to a partially deployed state while the securing element is in a first state, and (b) retracting the clot retrieval proximally from the partially deployed state while the securing element is in a second state that grips the cover to secure the cover.
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Citations
44 Claims
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1. A retrieval device deployable through a delivery sheath, the device comprising:
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an elongated shaft; a retrieval structure coupled to a distal zone of the elongated shaft, the retrieval structure including a capture structure and a cover having (a) a first portion coupled to the distal zone of the elongated shaft at a location proximal of the capture structure and (b) a free second portion, wherein, in a delivery state, the second portion of the cover extends proximally from the first portion; and a securing element coupled to the elongated shaft proximal to the first portion of the cover, wherein, when the cover is in the delivery state and at least a portion of the cover and at least a portion of the securing element are positioned within the delivery sheath, moving the retrieval device proximally increases an outward force exerted by the securing element against at least a portion of the cover and an inner surface of the delivery sheath, thereby inhibiting movement of the second portion of the cover relative to the elongated shaft. - 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)
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27. A system for retrieving vascular material, the system comprising:
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a delivery sheath having a distal portion; a retrieval device including an elongated shaft, a retrieval structure, and a securing element, wherein; the retrieval structure is coupled to a distal zone of the elongated shaft and includes a capture structure and a cover, the cover has a first portion coupled to the distal zone of the elongated shaft and a free second portion, in a partially deployed state, at least a distal portion of the capture structure extends past the distal portion of the delivery sheath, at least the second portion of the cover is within the delivery sheath, and the second portion of the cover extends proximally from the first portion, and the securing element is coupled to the elongated shaft proximal to the first portion of the cover, and the securing element is configured to expand when the device is retracted proximally from the partially deployed state such that the securing element grips at least a portion of the cover between the securing element and an inner surface of the delivery sheath, thereby preventing substantial movement of the second portion of the cover relative to the first portion of the cover while the retrieval device is retracted proximally. - View Dependent Claims (28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44)
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Specification