System and method for treating ischemic stroke
First Claim
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1. An apparatus for withdrawing thromboembolic material from a blood vessel, the apparatus comprising:
- an elongate member; and
a receiver on a distal portion of the elongate member, the receiver formed of a plurality of structural members arranged to form a sleeve having a central lumen, a first plurality of the structural members comprising longitudinally extending struts, a second plurality of the structural members comprising v-shaped engaging elements, and a third set of structural members comprising a plurality of axially spaced-apart circumferential rings attached to the longitudinal struts, each of said v-shaped engaging elements being disposed between adjacent ones of the longitudinal struts and including a first leg extending into the central lumen from a first longitudinal strut and a second leg extending into the central lumen from a second, adjacent longitudinal strut, said first and second legs attached to one another within the central lumen to define a plurality of longitudinally oriented apexes extending into the central lumen, wherein at least a distal row and a proximal row of the v-shaped engaging elements are disposed between a distal circumferential ring and a proximal circumferential ring and each apex is unattached to any other structure within the central lumen.
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Abstract
A thromboembolic removal system for treating ischemic stroke includes an elongate member and a receiver on a distal portion of the elongate member. The receiver includes structural members arranged to form a sleeve having a central lumen. A plurality of the structural members form engaging elements having apex regions that extend into the central lumen. During use of the thromboembolic removal system, the receiver is advanced over a body of thromboembolic material within a blood vessel, causing the body to be received into the central lumen, and causing the engaging elements to engage the body within the lumen.
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Citations
23 Claims
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1. An apparatus for withdrawing thromboembolic material from a blood vessel, the apparatus comprising:
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an elongate member; and a receiver on a distal portion of the elongate member, the receiver formed of a plurality of structural members arranged to form a sleeve having a central lumen, a first plurality of the structural members comprising longitudinally extending struts, a second plurality of the structural members comprising v-shaped engaging elements, and a third set of structural members comprising a plurality of axially spaced-apart circumferential rings attached to the longitudinal struts, each of said v-shaped engaging elements being disposed between adjacent ones of the longitudinal struts and including a first leg extending into the central lumen from a first longitudinal strut and a second leg extending into the central lumen from a second, adjacent longitudinal strut, said first and second legs attached to one another within the central lumen to define a plurality of longitudinally oriented apexes extending into the central lumen, wherein at least a distal row and a proximal row of the v-shaped engaging elements are disposed between a distal circumferential ring and a proximal circumferential ring and each apex is unattached to any other structure within the central lumen. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. An apparatus for withdrawing thromboembolic material from a blood vessel, the apparatus comprising:
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an elongate member; and a receiver on a distal portion of the elongate member, the receiver formed of a plurality of structural members arranged to form a sleeve having a central lumen, the structural members including longitudinal strut members, v-shaped engaging elements and a plurality of axially spaced-apart circumferential rings attached to the longitudinal struts, each v-shaped engaging element being disposed between adjacent ones of the longitudinal struts and including a first leg extending from a first longitudinal strut member and a second leg extending from a second longitudinal strut member from a fixed position thereon, said second longitudinal strut member adjacent to the first longitudinal strut member, the first leg forming an apex with the second leg, the apex extending into the central lumen, wherein at least a distal row and a proximal row of the v-shaped engaging elements are disposed between a distal circumferential ring and a proximal circumferential ring and wherein the first and second legs extend from a position that is longitudinally fixed relative to the first and second strut members and each apex is unattached to any other structure within the central lumen. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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Specification