Expandable slide and lock stent
First Claim
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1. An expandable slide and lock stent, the stent comprising a tubular member having a circumference and a longitudinal axis, the stent comprising:
- a first backbone and a second backbone, the first and the second backbones each having a reversing helical shape, a first part of the shape extending in a clockwise circumferential direction and reversing into a second part of the shape, the second part extending in a counterclockwise circumferential direction, the first and second backbones extending along at least a portion of the circumference and along the longitudinal axis;
a rail member defining proximal and distal ends, the proximal end of the rail member being coupled to the first backbone, the distal end of the rail member extending from the first backbone in the circumferential direction, the rail member configured to engage with an engagement element in the second backbone; and
wherein the rail member is configured to provide one-way movement of the second backbone away from the first backbone such that the tubular member can be expanded between a collapsed diameter and an expanded diameter.
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Abstract
An expandable slide and lock stent comprises a tubular member that can be expanded from a collapsed state to an expanded state. The tubular member can comprise a reversing helical backbone and at least one rail member extending from the helical backbone in a circumferential direction. The backbone can have at least one engagement element that can be configured to receive a rail member to form the tubular member. In some embodiments, the reversing helical backbone can comprise a plurality of discrete segments having a variable profile and/or wave form.
467 Citations
22 Claims
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1. An expandable slide and lock stent, the stent comprising a tubular member having a circumference and a longitudinal axis, the stent comprising:
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a first backbone and a second backbone, the first and the second backbones each having a reversing helical shape, a first part of the shape extending in a clockwise circumferential direction and reversing into a second part of the shape, the second part extending in a counterclockwise circumferential direction, the first and second backbones extending along at least a portion of the circumference and along the longitudinal axis; a rail member defining proximal and distal ends, the proximal end of the rail member being coupled to the first backbone, the distal end of the rail member extending from the first backbone in the circumferential direction, the rail member configured to engage with an engagement element in the second backbone; and wherein the rail member is configured to provide one-way movement of the second backbone away from the first backbone such that the tubular member can be expanded between a collapsed diameter and an expanded diameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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18. An expandable slide and lock stent, the stent comprising a tubular member having a circumference and a longitudinal axis, the stent comprising:
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a first backbone and a second backbone, the first and the second backbones each having a reversing helical shape in which a part of the shape spirals in a clockwise circumferential direction and another part of the shape spirals in a counterclockwise circumferential direction, the first and second backbones extending along at least a portion of the circumference and along the longitudinal axis; wherein the reversing helical shape of the first and second backbones each comprise a first wave having a first frequency, a first amplitude, a first portion with a positively trending slope, and a second portion with a negatively trending slope; wherein at least one of the first and second portions comprise a plurality of second waves having a second frequency and a second amplitude, the second frequency being greater than the first frequency and the second amplitude being less than the first amplitude; and a rail member defining proximal and distal ends, the proximal end of the rail member being coupled to the first backbone, the distal end of the rail member extending from the first backbone in the circumferential direction, the rail member configured to engage with an engagement element in the second backbone; wherein the rail member is configured to provide one-way movement of the second backbone away from the first backbone such that the tubular member can be expanded between a collapsed diameter and an expanded diameter. - View Dependent Claims (19, 20, 21)
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22. An expandable slide and lock stent, the stent comprising a tubular member having a circumference and a longitudinal axis, the stent comprising:
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a first backbone and a second backbone, the first and the second backbones each having a reversing helical shape, wherein the shape alternatingly reverses from a clockwise circumferential direction to a counterclockwise circumferential direction, and comprising at least one portion having a positively trending slope and at least one portion having a negatively trending slope, the first and second backbones extending along at least a portion of the circumference and along the longitudinal axis; wherein at least one of the portions having a positively trending slope and a negatively trending slope further comprises a plurality of wave forms; wherein each of the portions further comprises a plurality of slots, each of the slots being disposed at a different angle with respect to the longitudinal axis compared to the slots that are adjacent on the same portion; and a rail member defining proximal and distal ends, the proximal end of the rail member being coupled to the first backbone, the distal end of the rail member extending from the first backbone in the circumferential direction, the rail member configured to engage with an engagement element in the second backbone; wherein the rail member is configured to provide one-way movement of the second backbone away from the first backbone such that the tubular member can be expanded between a collapsed diameter and an expanded diameter.
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Specification