Delivery system with hooks for resheathability
First Claim
1. A stent delivery system comprising:
- an elongate body having a distal portion, a proximal portion, and an inner surface extending from the distal portion to the proximal portion, the distal portion being configured to extend within a blood vessel of a patient;
a stent expandable from a compressed configuration to an expanded configuration, the stent having a proximal region and a distal region;
a stabilizing member extending into an interior of the proximal region of the stent; and
one or more hook members extending distally from the stabilizing member, each hook member having a proximal section and a distal section, each hook member having a more curved configuration wherein the distal section of each hook member releasably engages the proximal region of the stent radially between the proximal section and the distal section by (i) extending through one or more interstices in the stent and (ii) curving proximally toward a free end of the hook member, and each hook member having a less curved configuration wherein the distal section of each hook member extends distally beyond the corresponding proximal section, each hook member being biased to the less curved configuration when unrestrained, wherein the distal section of each hook member, while in the more curved configuration, engages the inner surface of the elongate body and is held radially between the stent and the inner surface of the elongate body.
3 Assignments
0 Petitions
Accused Products
Abstract
Described herein are flexible implantable devices or stents that can, for example, navigate the tortuous vessels of the neurovasculature. The devices can also conform to the shape of tortuous vessels of the vasculature. In some embodiments, the devices can direct blood flow within a vessel away from an aneurysm or limit blood flow to the aneurysm. Methods and structures are provided for adjusting, along a length of the device, the porosity of the device while maintaining a cross-sectional dimension. In some embodiments, small hooks releasably engage the stent at a proximal end and are able to resheath the stent by retracting a proximal retaining member where the hooks are coupled to. The hooks straighten, unfurl, or otherwise disengage the stent when either unrestrained by a catheter or when coming into contact with an external stimulus found in the patient'"'"'s vasculature.
144 Citations
25 Claims
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1. A stent delivery system comprising:
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an elongate body having a distal portion, a proximal portion, and an inner surface extending from the distal portion to the proximal portion, the distal portion being configured to extend within a blood vessel of a patient; a stent expandable from a compressed configuration to an expanded configuration, the stent having a proximal region and a distal region; a stabilizing member extending into an interior of the proximal region of the stent; and one or more hook members extending distally from the stabilizing member, each hook member having a proximal section and a distal section, each hook member having a more curved configuration wherein the distal section of each hook member releasably engages the proximal region of the stent radially between the proximal section and the distal section by (i) extending through one or more interstices in the stent and (ii) curving proximally toward a free end of the hook member, and each hook member having a less curved configuration wherein the distal section of each hook member extends distally beyond the corresponding proximal section, each hook member being biased to the less curved configuration when unrestrained, wherein the distal section of each hook member, while in the more curved configuration, engages the inner surface of the elongate body and is held radially between the stent and the inner surface of the elongate body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of deploying a stent in a vessel of a patient, comprising:
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extending an elongate body within the vessel, the elongate body having a distal portion, a proximal portion, and an inner surface extending from the distal portion to the proximal portion; advancing, relative to and within the elongate body, a stent in a compressed configuration, the stent being engaged at a proximal region by one or more hook members extending distally from a proximal retaining member, each hook member having a proximal section and a distal section, wherein the distal section of each hook member releasably engages the stent by (a) extending through one or more interstices defined by the stent and (b) curving proximally toward a free end of the hook member, wherein the distal section of each hook member engages the inner surface of the elongate body and is held radially between the stent and the inner surface of the elongate body; expanding a distal region of the stent to an expanded configuration by advancing the distal region out of the distal portion of the elongate body; and releasing engagement of the stent by the one or more hook members by advancing the proximal region and the distal section of each hook member out of the distal portion of the elongate body, thereby permitting the one or more hook members to unfurl and disengage the stent. - View Dependent Claims (14, 15, 16, 17, 18, 19)
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20. A stent delivery system comprising:
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an elongate body having a distal portion, a proximal portion, and an inner surface extending from the distal portion to the proximal portion, the distal portion being configured to extend within a blood vessel of a patient; a stent having a proximal region and a distal region and being expandable from a compressed configuration to an expanded configuration; a proximal retaining member concentrically disposed within the elongate body; and a plurality of hook members extending distally from the proximal retaining member, each hook member having (i) a restrained configuration in which (a) a proximal section releasably engages the stent proximal region by extending through one or more interstices defined by the stent and (b) a distal section extends proximally from the proximal region and is held by the inner surface of the elongate body in a position interposed between the inner surface of the elongate body and an exterior surface of the stent while the stent is in the compressed configuration and (ii) an unrestrained configuration, wherein the distal section of each hook member, while in the restrained configuration, engages the inner surface of the elongate body and is held radially between the stent and the inner surface of the elongate body. - View Dependent Claims (21, 22, 23, 24, 25)
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Specification