Interspinous process implant having deployable wings and method of implantation
First Claim
1. An interspinous-process spacer, comprising:
- an expandable segment with an upper portion and a lower portion;
the upper portion having an upper proximal member and an upper distal member;
the lower portion having a lower proximal member and a lower distal member;
the upper proximal member being in contact with the lower proximal member when the expandable segment is in a collapsed configuration, the upper proximal member being spaced away from the lower proximal member when the expandable segment is in an expanded configuration;
an inner elongate member disposed between the upper and lower portions;
wherein a distal end of the inner elongate member is affixed to the upper distal member and the lower distal member;
wherein displacement of the inner elongate segment in a proximal direction relative to the expandable segment, when the expandable segment is in the collapsed configuration, causes the expandable segment to assume its expanded configuration;
wherein the distance between a proximal tip of the inner elongate member and a most proximal end of the expandable segment is greater in the expanded configuration than in the collapsed configuration.
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Accused Products
Abstract
An embodiment of a system in accordance with the present invention can include an implant having a spacer with a thickness and a wing, wherein a first configuration of the wing has a first height substantially similar to the thickness and wherein the wing is adapted to be selectably arranged in a second configuration such that the wing has a second height greater than the first height. A periphery of the implant has a shape generally conformal with a shape of an inner surface of a cannula and a cross-sectional diameter smaller than an inner diameter of the cannula. The cannula is inserted such that a proximal end of the cannula is arranged between the adjacent spinous processes. The implant is then urged into position between the adjacent spinous processes by way of the cannula, and subsequently arranged in a second configuration to fix the implant in position.
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Citations
11 Claims
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1. An interspinous-process spacer, comprising:
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an expandable segment with an upper portion and a lower portion;
the upper portion having an upper proximal member and an upper distal member;
the lower portion having a lower proximal member and a lower distal member;the upper proximal member being in contact with the lower proximal member when the expandable segment is in a collapsed configuration, the upper proximal member being spaced away from the lower proximal member when the expandable segment is in an expanded configuration; an inner elongate member disposed between the upper and lower portions; wherein a distal end of the inner elongate member is affixed to the upper distal member and the lower distal member; wherein displacement of the inner elongate segment in a proximal direction relative to the expandable segment, when the expandable segment is in the collapsed configuration, causes the expandable segment to assume its expanded configuration; wherein the distance between a proximal tip of the inner elongate member and a most proximal end of the expandable segment is greater in the expanded configuration than in the collapsed configuration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification