Surgical positioning assembly and associated spinal implant device and surgical methods
View Patent ↗The present invention provides a surgical positioning assembly that is used to place a spinal implant device or the like within an intervertebral space or the like of a patient and associated surgical methods. Advantageously, the surgical positioning assembly allows access to the implantation site to be gained along a first axis, with the implant device subsequently being placed along a second axis that is disposed at an angle or substantially perpendicular to the first axis via the actuation of the surgical positioning assembly. Thus, for example, a surgeon may use an anterior or posterior approach to place an implant device laterally, or vice versa.
1. A surgical positioning assembly operable for positioning a surgical implant device within an implantation site in the body of a patient through an incision and/or portal, comprising:
a grip operable for holding the surgical positioning assembly along a first axis through an incision and/or portal;
a retention mechanism operable for selectively coupling the surgical implant device to the grip and holding the surgical implant device substantially along the first axis; and
a pivot/rotation mechanism operable for one or more of selectively pivoting and selectively rotating the surgical implant device relative to the grip until it is substantially along a second axis that is rotated relative to the first axis, the pivot/rotation mechanism comprising:
a knob comprising a threaded channel;
a rod comprising a hook structure and a threaded portion, the rod configured to be received in the threaded channel, the rod extending between the knob and the retention mechanism; and
wherein the pivot/rotation mechanism is actuated by selectively bringing the knob into contact with the grip by rotating the knob, the contact between the knob and the grip causing the hook structure to move along the first axis with respect to the knob.
2. The surgical positioning assembly of claim 1 , wherein the retention mechanism comprises a saddle structure.
3. The surgical positioning assembly of claim 2 , wherein the surgical implant device comprises one or more bar structures that selectively engage the one or more rod structures via the one or more hook structures and saddle structures.
4. The surgical positioning assembly of claim 1 , wherein the pivot/rotation mechanism comprises one or more rod structures comprising one or more of a hook structure and a saddle structure.
5. The surgical positioning assembly of claim 4 , wherein the surgical implant device comprises one or more bar structures that selectively engage the one or more rod structures via the one or more hook structures and saddle structures.
6. The surgical positioning assembly of claim 1 , wherein the surgical implant device comprises an intervertebral cage.
7. A surgical positioning assembly for positioning a surgical implant device within an implantation site in the body of a patient through an incision and/or portal, comprising:
a knob;
a grip comprising a threaded channel, a proximal end, and a distal end, the grip operable for holding the surgical positioning assembly along a first axis through an incision and/or portal;
a saddle structure fixedly attached to the distal end of the grip for selectively coupling with a first bar structure of the implant device;
a rod comprising a threaded portion and a hook structure, the rod configured to be received in a threaded channel in the grip, the rod extending between the knob and a hook structure extending beyond the distal end of the grip, the hook structure for selectively coupling with a second bar structure on of the implant device;
wherein actuation of the knob causes the rod to recede into the grip and to rotate the surgical implant device relative to the grip until it is substantially along a second axis that is rotated relative to the first axis.
8. A surgical method for positioning a surgical implant device within an implantation site in the body of a patient through an incision and/or portal using a surgical positioning assembly, comprising:
disposing the surgical positioning assembly and surgical implant device through the incision and/or portal and adjacent to the implantation site along a first axis;
actuating the surgical positioning assembly to rotate the surgical implant device relative to the surgical positioning assembly until the surgical implant device is positioned substantially along a second axis that is rotated with respect to the first axis by rotating the knob in a first direction to selectively bring the knob into contact with the grip, the contact between the knob and the grip causing the hook structure to move along the first axis with respect to the knob; and
actuating the surgical positioning assembly by rotating the knob in a second direction to disengage the surgical implant device from the surgical positioning assembly.
9. The surgical positioning assembly of claim 7 , wherein the surgical implant device comprises an intervertebral cage.