Multi-pivot thrombectomy device
First Claim
1. A device for retrieving vascular debris in a vasculature comprising:
- at least three segments radially expandable from a collapsed state to an expanded state, each of the at least three segments having a waist comprising a radially largest region of the segment;
at least one intermediate portion, each of the at least one intermediate portion comprising a pivot that connects adjacent segments, each pivot having a diameter less than a diameter of the waist;
a tether attached to a proximalmost of the at least three segments and configured to position the at least three segments;
wherein each of the at least three segments comprises a proximal end and a distal end that are connected by only struts and sub-struts, the struts and sub-struts extending radially outside the diameter of the pivot, wherein, in each of the at least three segments, at least one strut extends proximally from the distal end and along a first longitudinal region of the segment and divides into at least two sub-struts, the at least two sub-struts being entirely within a second longitudinal region of the segment that is outside the radially largest region of the segment, the struts tapering from the waist radially inwardly toward a longitudinal axis of the device as the struts approach an adjacent intermediate portion;
wherein the at least three segments and the at least one intermediate portion form a single monolithic structure;
wherein a longitudinal length of each intermediate portion is less than a longitudinal length of each of the segments;
wherein each intermediate portion forms a circumferentially continuous hollow cylinder.
1 Assignment
0 Petitions
Accused Products
Abstract
A device may be used for capturing and retrieving vascular debris. The device may comprise: at least two segments radially expandable from a collapsed state to an expanded state, each of the at least two segments having (a) a waist comprising a radially largest region of the segment and (b) two longitudinal ends; at least one intermediate portion, each of the at least one intermediate portion comprising a pivot that connects adjacent segments, each pivot having a diameter less than a diameter of the waist; a tether attached to a proximalmost of the at least two segments and configured to position the at least two segments; wherein each of the at least two segments comprises at least two struts that extend longitudinally from a proximal end to a distal end of the segment, the at least two struts tapering from the waist radially inward toward a longitudinal axis of the device as the at least two struts approach an adjacent intermediate portion.
486 Citations
24 Claims
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1. A device for retrieving vascular debris in a vasculature comprising:
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at least three segments radially expandable from a collapsed state to an expanded state, each of the at least three segments having a waist comprising a radially largest region of the segment; at least one intermediate portion, each of the at least one intermediate portion comprising a pivot that connects adjacent segments, each pivot having a diameter less than a diameter of the waist; a tether attached to a proximalmost of the at least three segments and configured to position the at least three segments; wherein each of the at least three segments comprises a proximal end and a distal end that are connected by only struts and sub-struts, the struts and sub-struts extending radially outside the diameter of the pivot, wherein, in each of the at least three segments, at least one strut extends proximally from the distal end and along a first longitudinal region of the segment and divides into at least two sub-struts, the at least two sub-struts being entirely within a second longitudinal region of the segment that is outside the radially largest region of the segment, the struts tapering from the waist radially inwardly toward a longitudinal axis of the device as the struts approach an adjacent intermediate portion; wherein the at least three segments and the at least one intermediate portion form a single monolithic structure; wherein a longitudinal length of each intermediate portion is less than a longitudinal length of each of the segments; wherein each intermediate portion forms a circumferentially continuous hollow cylinder. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A system for retrieving vascular debris in a vasculature comprising:
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at least three segments expandable from a collapsed state to an expanded state, each of the at least three segments having a waist comprising a radially largest region of the segment; at least two intermediate portions, each of the at least two intermediate portions comprising a pivot that connects adjacent segments, each pivot having a diameter less than a diameter of the waist; a sheath configured to encase the at least three segments in the collapsed state; and a tether attached to a proximalmost of the at least three segments and configured to position the at least three segments relative to the sheath; wherein each of the at least three segments comprises, between a proximal end and a distal end thereof, only struts and sub-struts, the struts and sub-struts extending radially outside the diameter of the pivot, wherein, in each of the at least three segments, at least one strut extends proximally from the distal end and along a first longitudinal region of the segment and divides into at least two sub-struts, the at least two sub-struts being entirely within a second longitudinal region of the segment that is outside the radially largest region of the segment; wherein the at least three segments and the at least two intermediate portions form a single monolithic structure; wherein a longitudinal length of each intermediate portion is less than a longitudinal length of each of the segments; wherein each intermediate portion forms a circumferentially continuous hollow cylinder. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A method of retrieving vascular debris from a vasculature comprising:
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inserting into the vasculature of a patient at least a portion of a sheath comprising a distal opening and encasing at least two segments expandable from a collapsed state to an expanded state, each of the at least two segments having a waist comprising a radially largest region of the segment and at least one intermediate portion comprising a pivot connecting the segment to an axially adjacent segment, wherein the at least two segments and the at least one intermediate portion form a single monolithic structure, wherein each of the at least two segments comprises, between a proximal end and a distal end thereof, only struts and sub-struts, the struts and sub-struts extending radially outside a diameter of the at least one intermediate portion, wherein, in each of the at least two segments, at least one strut extends proximally from the distal end and along a first longitudinal region of the segment and divides into at least two sub-struts, the at least two sub-struts being entirely within a second longitudinal region of the segment that is outside the radially largest region of the segment, wherein a longitudinal length of each intermediate portion is less than a longitudinal length of each of the segments, wherein each intermediate portion forms a circumferentially continuous hollow cylinder; expanding at least a portion of the at least two segments into vascular debris; and retrieving the at least two segments and the vascular debris to within the sheath. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification