INTERSPINOUS PROCESS IMPLANTS AND METHODS OF USE
Systems and method in accordance with an embodiment of the present invention can includes an implant comprising a first wing, a spacer extending from the first wing, and a distraction guide. The distraction guide is arranged in a first configuration to pierce and/or distract tissue associated with adjacent spinous processes extending from vertebrae of a targeted motion segment. The implant can be positioned between the adjacent spinous processes and once positioned, the implant can be arranged in a second configuration. When arranged in a second configuration, the distraction guide can act as a second wing. The first wing and the second wing can limit or block movement of the implant along a longitudinal axis of the implant.
1 . An apparatus, comprising:
an implant member having a central portion configured to be disposed between a pair of adjacent spinous processes;
a retention member movably coupled to the implant member, the retention member configured to move relative to the implant member between a first position and a second position, the retention member configured to limit lateral movement of the implant member relative to the pair of adjacent spinous processes when in the second position; and
an actuator having a rotatable member, at least a portion of the rotatable member disposed within the implant member, the actuator configured to move the retention member between the first position and the second position when the central portion is disposed between the pair of adjacent spinous processes.
2 . The apparatus of claim 1 , wherein the retention member is movably coupled to a distal end portion of the implant member, the distal end portion of the implant member configured to dilate a bodily tissue when the retention member is in the first position.
3 . The apparatus of claim 1 , wherein a portion of the retention member is disposed within the implant member when in the first position, the portion of the retention is disposed outside of the implant member when in the second position.
4 . The apparatus of claim 1 , wherein the rotatable member of the actuator is movably coupled to the retention member.
5 . The apparatus of claim 1 , wherein the actuator includes a translatable member movably coupled to the rotatable member and the retention member, the translatable member configured to move within the implant member.
6 . The apparatus of claim 1 , wherein the actuator includes a translatable member threadedly coupled to the rotatable member, the rotatable member configured to move the translatable member within the implant member such that the retention member is moved between the first position and the second position.
7 . The apparatus of claim 1 , wherein the actuator includes an engagement portion configured to matingly receive a portion of a deployment tool, the actuator configured to move the retention member between the first position and the second position via the deployment tool when the central portion is disposed between the pair of adjacent spinous processes.
8 . The apparatus of claim 1 , wherein:
the rotatable member is a screw having a threaded portion disposed within the implant member and an engagement portion disposed outside of the implant member, the engagement portion configured to matingly receive a portion of a deployment tool; and
the actuator includes a collar defining a threaded opening movably coupled to the threaded portion of the screw such that the collar translates within the implant member when the screw is rotated, the collar pivotably coupled to the retention member.
9 . An apparatus, comprising:
an implant member having a central portion and a distal end portion, at least a portion of the central portion configured to be disposed between a pair of adjacent spinous processes, the distal end portion of the implant having a first configuration and a second configuration, the distal end portion of the implant configured to dilate a bodily tissue when in the first configuration, the distal end portion of the implant configured to limit lateral movement of the implant relative to the pair of adjacent spinous processes when in the second configuration; and
an actuator having at least a portion disposed within the distal end portion of the implant member, the actuator configured to move the distal end portion of the implant member between the first configuration and the second configuration when the portion of the central portion is disposed between the pair of adjacent spinous processes.
10 . The apparatus of claim 9 , wherein the distal end portion of the implant member includes a retention member rotatably coupled to the implant member such that a portion of the retention member is disposed within an interior of the implant member when the distal end portion of the implant is in the first configuration, the portion of the retention is disposed outside of the interior of the implant member when the distal end portion of the implant is in the second configuration.
11 . The apparatus of claim 9 , wherein the actuator includes a rotatable member configured to engage a portion of the distal end portion of the implant, the rotatable member configured to rotate about an axis non-parallel to a lateral axis defined by the pair of adjacent spinous processes.
12 . The apparatus of claim 9 , wherein the actuator includes a translatable member movably coupled to the distal end portion of the implant member, the translatable member is configured to translate within the implant member along an axis non-parallel to a lateral axis defined by the pair of adjacent spinous processes.
13 . The apparatus of claim 9 , wherein the actuator includes a rotatable member and a translatable member threadedly coupled to the rotatable member, the rotatable member configured to move the translatable member within the implant member such that the distal end portion of the implant member is moved between the first configuration and the second configuration.
14 . The apparatus of claim 9 , wherein the actuator includes an engagement portion configured to matingly receive a portion of a deployment tool, the actuator configured to move the distal end portion of the implant between the first configuration and the second configuration via the deployment tool when the portion of the central portion is disposed between the pair of adjacent spinous processes.
15 . The apparatus of claim 9 , wherein the actuator includes a biasing member configured to bias the distal end portion of the implant in at least one of the first configuration or the second configuration.
16 . An apparatus, comprising:
an implant member having a central portion and a distal end portion, at least a portion of the central portion configured to be disposed between a pair of adjacent spinous processes;
a retention member coupled to the distal end portion and configured to rotate about a first axis, the retention member configured to selectively limit lateral movement of the implant relative to the pair of adjacent spinous processes; and
an actuator coupled to the implant member and configured to rotate about a second axis substantially normal to the first axis such that the retention member is rotated when the actuator is rotated about the second axis.
17 . The apparatus of claim 16 , wherein the retention member is configured to rotate about the first axis between a first position and a second position, the retention member configured to limit lateral movement of the implant relative to the pair of adjacent spinous processes when in the second position.
18 . The apparatus of claim 16 , wherein the retention member is configured to rotate about the first axis between a first position and a second position, the retention member configured to dilate a bodily tissue when in the first position.
19 . The apparatus of claim 16 , wherein the second axis is substantially parallel to a lateral axis defined by the pair of adjacent spinous processes.
20 . The apparatus of claim 16 , wherein the first axis is substantially parallel to a posterior-anterior axis defined by a body.
21 . The apparatus of claim 16 , wherein the actuator includes a translatable member movably coupled to the retention member, the translatable member configured to translate within the implant member along the second axis.
22 . The apparatus of claim 16 , wherein the actuator includes:
a screw having a threaded portion disposed within the distal end portion of the implant member and an engagement portion disposed outside of the distal end portion of the implant member, the engagement portion configured to matingly receive a portion of a deployment tool; and
a collar defining a threaded opening movably coupled to the threaded portion of the screw such that the collar translates within the implant member along the second axis when the screw is rotated about the second axis, the collar pivotably coupled to the retention member.
23 . The apparatus of claim 16 , wherein the actuator includes an engagement portion configured to matingly receive a portion of a deployment tool, the actuator configured to move the retention member when the portion of the central portion is disposed between the pair of adjacent spinous processes.
24 . An apparatus, comprising:
an implant member having a central portion configured to be disposed between a pair of adjacent spinous processes;
a retention member movably coupled to the implant member, the retention member configured to move relative to the implant member between a first position and a second position, the retention member configured to limit lateral movement of the implant member relative to the pair of adjacent spinous processes when in the second position; and
an actuator having a translatable member disposed within the implant member, the translatable member configured to translate in along an axis non-parallel to a lateral axis defined by the pair of adjacent spinous processes when the central portion is disposed between the pair of adjacent spinous processes to move the retention member between the first position and the second position.
25 . The apparatus of claim 24 , wherein the axis is substantially normal to the lateral axis defined by the pair of adjacent spinous processes.
26 . The apparatus of claim 24 , wherein the axis is substantially parallel to a posterior-anterior axis defined by a body.
27 . The apparatus of claim 24 , wherein the retention member is movably coupled to a distal end portion of the implant member, the distal end portion of the implant member configured to dilate a bodily tissue when the retention member is in the first position.
28 . The apparatus of claim 24 , wherein a portion of the retention member is disposed within the implant member when in the first position, the portion of the retention is disposed outside of the implant member when in the second position.
29 . The apparatus of claim 24 , wherein the translatable member is pivotably coupled to the retention member.
30 . The apparatus of claim 24 , wherein the actuator includes a rotatable member threadedly coupled to the translatable member, the rotatable member configured to move the translatable member within the implant member such that the retention member is moved between the first position and the second position.
31 . The apparatus of claim 24 , wherein:
the translatable member is a collar defining a threaded opening, the collar pivotably coupled to the retention member; and
the actuator includes a screw having a threaded portion disposed within the implant member and an engagement portion disposed outside of the implant member, the threaded portion movably disposed within the threaded opening of the collar such that the collar translates within the implant member when the screw is rotated, the engagement portion configured to matingly receive a portion of a deployment tool.
32 . A method, comprising:
inserting into a body an implant having a central portion and a distal end portion, the distal end portion having a retention member movable between a first position and a second position;
disposing at least a portion of the central portion between a pair of adjacent spinous processes when the retention member is in the first position; and
actuating an actuator having at least a portion disposed within the distal end portion of the implant such that the retention member is moved from the first position to the second position.
33 . The method of claim 32 , wherein the retention member is configured to limit lateral movement of the implant relative to the pair of adjacent spinous processes.
34 . The method of claim 32 , wherein the inserting includes inserting percutaneously the implant via a lateral incision.
35 . The method of claim 32 , wherein the disposing includes disposing the implant such that the distal end portion of the implant dilates a bodily tissue.
36 . The method of claim 32 , wherein:
the actuator includes a rotatable member and a translatable member; and
the actuating includes rotating the rotatable member to move the translatable member within the implant such that the retention member is moved between the first position and the second position.
37 . The method of claim 32 , wherein the actuating includes rotating a portion of the actuator about an axis non-parallel to a lateral axis defined by the pair of adjacent spinous processes.
38 . The method of claim 32 , wherein the actuating includes inserting percutaneously a portion of a deployment tool into an engagement portion of the actuator.
39 . A method, comprising:
inserting into a body an implant having a central portion and a distal end portion, the distal end portion including a retention member configured to rotate about a first axis;
disposing at least a portion of the central portion between a pair of adjacent spinous processes; and
rotating an actuator about a second axis different than the first axis such that the retention member is rotated about the first axis in response to the rotating.
40 . The method of claim 39 , wherein the retention member is rotated from a first position and a second position in response to the rotating, the retention member configured to limit lateral movement of the implant relative to the pair of adjacent spinous processes when in the second position.
41 . The method of claim 39 , wherein the second axis is substantially normal to the first axis.
42 . The method of claim 39 , wherein the second axis is substantially parallel to a lateral axis defined by the pair of adjacent spinous processes.
43 . The method of claim 39 , wherein the first axis is substantially parallel to a posterior-anterior axis defined by a body.
44 . The method of claim 39 , wherein a translatable member pivotably coupled to the retention member translates within the implant member along the second axis in response to the rotating.
45 . The method of claim 39 , further comprising:
inserting a portion of a deployment tool into an engagement portion of the actuator before the rotating, the rotating being performed via the deployment tool.