Method for delivering and positioning implants in the intervertebral disc environment
The present invention relates generally to devices and methods for delivering medical devices, such as implants, to desired tissue sites, such as the intervertebral disc. In one aspect, an intervertebral disc repair and diagnostic device that is minimally invasive and that provides precise access to the desired site is provided. In some aspects, the device and method are adapted to deliver, position and expand implants that are initially oriented and compressed for minimally invasive, yet precise and effective implantation.
1. A method of delivering and positioning an implant within or adjacent to intervertebral disc tissue comprising:
providing a delivery device comprising a proximal end for handling by a user and a distal end comprising a restraining member or sleeve for restraining a compressed implant;
wherein said delivery device further comprises an advancer for advancing said implant relative to said sleeve wherein said advancer travels within, concentrically over, or alongside said sleeve;
providing a compressible implant having one or more limiting dimensions;
compressing said implant along said one or more limiting dimensions;
constraining said implant with said restraining member;
inserting the distal end of said delivery device within intervertebral disc tissue beyond an innermost surface of an anulus lamella,
wherein said implant is rotatable relative to the limiting dimension to achieve a diminished profile;
rotating said implant beyond the innermost surface of an anulus lamella to a desired orientation;
advancing said implant out of said sleeve, wherein said implant is folded;
allowing said implant to partially expand;
causing relative motion between the advancer and sleeve such that said sleeve contacts one or more surfaces of the folded implant thereby causing further expansion of said implant;
retracting said advancer and implant toward said innermost lamella of the anulus, thereby causing the implant to advance laterally along said surface and fully expand;
releasing the restraining member;
positioning the implant beyond the innermost lamella of an anulus; and
removing the delivery device.
2. The method of claim 1 , wherein the step of compressing the implant comprises folding of the implant along one or more axes.
3. The method of claim 1 , wherein expansion of the implant is achieved through unfolding of the implant along one or more axes.
4. The method of claim 1 , wherein the step of compressing the implant comprises a step selected from the group consisting of one or more of the following: deflating, compacting, compressing, closing and condensing the implant.
5. The method of claim 1 , wherein the implant expansion comprises a step selected from the group consisting of one or more of the following: inflating, enlarging, swelling, and opening the implant.
6. The method of claim 1 , wherein the advancer is releaseably coupled to the implant.
7. The method of claim 1 , wherein the restraining member partially restrains the implant.
8. The method of claim 1 , wherein said implant expands due to inherent resiliency.
9. The method of claim 1 , wherein said implant is substantially rectangular.
10. The method of claim 1 , wherein said implant is selected from a group of materials consisting of one or more of the following materials: nitinol, steel, and polymer.
11. The method of claim 1 , wherein said implant comprises collagen or small intestine submucosa.
12. The method of claim 1 , wherein said implant comprises seeded tissue.
13. The method of claim 1 , wherein said implant comprises unseeded tissue.
14. The method of claim 1 , wherein said implant comprises a barrier.
15. The method of claim 1 , further comprising anchoring said implant to said intervertebral tissue.
16. The method of claim 1 , further comprising activating an anchoring mechanism within said implant, thereby anchoring said implant to the disc.