Minimal incision maximal access MIS spine instrumentation and method
A surgical access device includes a frame defining an aperture, first and second support members mounted on the frame, and first and second retractor blades releasably coupled with the first and second support members, respectively. The first and second retractor blades each include a distal portion defining a recess having an arcuate profile, wherein the first and second retractor blades are movable between a close cooperative position and a spaced apart position with respect to each other.
1. A surgical access device comprising: a frame defining an aperture, wherein the aperture of the frame defines a four-sided window; the frame includes first and second portions pivotably associated with each other; first and second support members mounted on the frame, wherein the first and second support members are disposed within the first and second portions of the frame, respectively; the first support member is translatably mounted within the first portion of the frame, the second support member is pivotably coupled with the second portion of the frame; and first and second retractor blades releasably coupled with the first and second support members, respectively, the first and second retractor blades each including a distal portion defining a recess having an arcuate profile, wherein the recess defines a concavity between a lateral side and a distal end of the respective first and second retractor blades, wherein the first and second retractor blades are movable between a close cooperative position and a spaced apart position with respect to each other.
2. The surgical access device according to claim 1 , wherein the first support member includes a first linkage having a threaded portion threadably engaging the first portion of the frame and rotatably engaging the first support member, whereby rotation of the first linkage imparts translation of the first support member within the first portion of the frame.
3. The surgical access device according to claim 1 , wherein the second support member includes a second linkage having a threaded portion threadably engaging the second portion of the frame and slidably engaging the second support member, whereby rotation of the second linkage causes pivotal movement of the second support member with respect to the second portion of the frame.
4. The surgical access device according to claim 3 , wherein the second support member is pivotable with the second portion of the frame independent of the first support member.
5. The surgical access device according to claim 3 , wherein the first support member is translatable within the first portion of the frame independent of the second support member.
6. The surgical access device according to claim 3 , wherein the first and second retractor blades are hemispherical, whereby when the first and second retractor blades are in the close cooperative position, the first and second retractor blades define a tubular passage.
7. The surgical access device according to claim 1 , wherein the first and second retractor blades each define an arched cutout portion between a distal end and a side of the respective first and second retractor blades.
8. The surgical access device according to claim 1 , wherein the first and second retractor blades define a channel when disposed in the close cooperative position.
9. The surgical access device according to claim 8 , wherein the channel is configured and dimensioned to receive therethrough a surgical instrument.
10. The surgical access device according to claim 1 , wherein the first and second retractor blades each have a non-circular cross-section.