Devices and methods for cervical lateral fixation
First Claim
1. An implantable spinal fixation device, comprising:
- a continuous, unitary elongate rod member having a main body extending from a proximal terminal end to a distal terminal end to constitute a length of the rod member, the main body having a substantially circular or ovoid cross sectional shape;
a first mounting eyelet formed on the elongate rod member in proximity to the distal end of the rod member and having an opening formed therein, the opening having a first central axis extending therethrough, the first central axis intersecting the length and a longitudinal axis that extends between the proximal and distal terminal ends of the rod member; and
a second mounting eyelet formed on the elongate rod member remote from the first mounting eyelet and distal of the proximal terminal end, the second mounting eyelet having an opening formed therein that has a second central axis extending therethrough, the second central axis being offset from each of the length, the proximal terminal end, and the longitudinal axis that extends between the proximal and distal terminal ends of the rod member, the first and second mounting eyelets being configured to be fixedly located with respect to each other at all times, wherein top surfaces of the first and second mounting eyelets are not collinear,wherein the main body of the rod member is curved in at least one plane along its length such that one side of the main body of the rod member has a concave portion and an opposed side of the main body of the rod member has a concurrent convex portion when viewed from a plane that is perpendicular to a central axis that extends through the opening of the second mounting eyelet without contacting a body of the second mounting eyelet and which is parallel to a plane extending through a substantial length of the main body of the rod member,wherein the second mounting eyelet comprises an extension formed laterally offset from the main body of the elongate rod member; and
wherein the direction of curvature of the concave and convex portions is towards the second mounting eyelet.
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Accused Products
Abstract
Devices and methods are provided for treatment of the cervical spine. The devices and methods allow for treatment to be delivered from a lateral or posterior-lateral location of a subject, proximate to the cervical region of the spine. One exemplary embodiment of a spinal implant includes an elongate cage member and a plate member appended to a proximal end of the cage member. The plate member can be oriented in a manner such that it is asymmetric with respect to a long axis of the cage member. In another exemplary embodiment, an implant includes a cage member having a distal end that has an asymmetrical, bulleted shape such that the distal end is biased towards a superior or cranial direction. In a third exemplary embodiment, an implant includes a spinal fixation element and at least two mounting eyelets formed thereon. Exemplary methods related to implanting spinal implants from a lateral or posterior-lateral location are also provided.
214 Citations
21 Claims
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1. An implantable spinal fixation device, comprising:
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a continuous, unitary elongate rod member having a main body extending from a proximal terminal end to a distal terminal end to constitute a length of the rod member, the main body having a substantially circular or ovoid cross sectional shape; a first mounting eyelet formed on the elongate rod member in proximity to the distal end of the rod member and having an opening formed therein, the opening having a first central axis extending therethrough, the first central axis intersecting the length and a longitudinal axis that extends between the proximal and distal terminal ends of the rod member; and a second mounting eyelet formed on the elongate rod member remote from the first mounting eyelet and distal of the proximal terminal end, the second mounting eyelet having an opening formed therein that has a second central axis extending therethrough, the second central axis being offset from each of the length, the proximal terminal end, and the longitudinal axis that extends between the proximal and distal terminal ends of the rod member, the first and second mounting eyelets being configured to be fixedly located with respect to each other at all times, wherein top surfaces of the first and second mounting eyelets are not collinear, wherein the main body of the rod member is curved in at least one plane along its length such that one side of the main body of the rod member has a concave portion and an opposed side of the main body of the rod member has a concurrent convex portion when viewed from a plane that is perpendicular to a central axis that extends through the opening of the second mounting eyelet without contacting a body of the second mounting eyelet and which is parallel to a plane extending through a substantial length of the main body of the rod member, wherein the second mounting eyelet comprises an extension formed laterally offset from the main body of the elongate rod member; and wherein the direction of curvature of the concave and convex portions is towards the second mounting eyelet. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An implantable spinal fixation device, comprising:
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a continuous, unitary elongate rod member extending from a proximal terminal end to a distal terminal end to constitute a length of the rod member; a first mounting eyelet formed on the elongate rod member in proximity to the distal terminal end of the rod member and having a central lumen extending therethrough, the central lumen having a first central axis extending therethrough, the first central axis intersecting the length and a longitudinal axis that extends between the proximal and distal terminal ends of the rod member; and a second mounting eyelet formed on the elongate rod member in proximity to the proximal. terminal end of the rod member and having an central lumen extending therethrough, the central lumen having a second central axis extending therethrough, the second central axis being offset from the length and the central longitudinal axis that extends along the rod member between the proximal and distal terminal ends of the rod member, the first and second mounting eyelets being configured to be fixedly located with respect to each other at all times, wherein top surfaces of the first and second mounting eyelets are not collinear, wherein, when viewed from a plane that is perpendicular to a central axis that extends through the opening of the second mounting eyelet without contacting a body of the second mounting eyelet, and which is parallel to a plane extending through a substantial length of the rod member, the rod member is curved along its length such that one side of the rod member has a concave portion extending along a majority of the length of the rod and an opposed side of the rod member has a concurrent convex portion extending along a majority of the length of the rod, with the direction of curvature of the concave and convex portions being towards the second mounting eyelet. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification