Adjustable anchor systems and methods
An adjustable anchor system provides for securing tissue to bone and includes an anchor with a collapsible suture loop affixed thereto and a tissue suture connected to the collapsible suture loop. After the tissue suture is loaded into the tissue and the anchor implanted into the bone the collapsible loop is collapsed to tension the tissue suture.
1. A suture anchor system comprising:
a suture anchor having a central axial cannulation;
a collapsible suture loop affixed to the anchor, the loop being defined by a sliding knot;
a fixed tail and a collapsing tail extending from the sliding knot from a side of the sliding knot that is opposite of a side of the sliding knot from which the collapsible suture loop extends; and
a suture grasper that is received through the cannulation to facilitate threading the fixed tail through the cannulation after the fixed tail is loaded into a soft tissue.
2. The suture anchor system of claim 1 wherein the fixed tail is looped through the collapsible loop.
3. The suture anchor system of claim 1 wherein a portion of the suture loop is configured to be drawn through the sliding knot to collapse itself.
4. The suture anchor system of claim 1 wherein an attachment member on the anchor passes through the collapsible suture loop to affix the collapsible loop to the anchor.
5. The suture anchor system of claim 1 wherein the anchor has a central axial cannulation, tension upon the collapsing tail collapses the loop, and the collapsible loop and the collapsing tail extend proximally out of the cannulation.
6. The suture anchor system of claim 5 wherein a post in the anchor passes through the collapsible loop to affix the collapsible loop to the anchor.
7. The suture anchor system according to claim 6 wherein the sliding knot is disposed proximal of the post.
8. The suture anchor system of claim 1 and further comprising bone engaging protrusions about the suture anchor.
9. The suture anchor system of claim 1 wherein the suture anchor, collapsible loop, fixed tail, and collapsing tail are sterile and packaged in a bacteria proof enclosure.
10. The suture anchor system of claim 1 wherein the anchor has an elongated cylindrical shape whereby to be fixedly received within a hole drilled into a bone.
11. The suture anchor system of claim 1 wherein the collapsible suture loop has a lower coefficient of friction than the fixed tail.
12. The suture anchor system of claim 1 and further comprising a suture receiver on the suture anchor for receiving the fixed tail.
13. The suture anchor system of claim 12 wherein the suture receiver comprises an eyelet at a distal end of the suture anchor.
14. The suture anchor system of claim 13 wherein the eyelet is formed of overlapping arms whereby to allow suture to be loaded into the eyelet between the arms.
15. The suture anchor system of claim 13 wherein the eyelet is formed of a sidewall and wherein a funnel shaped slot passes through the sidewall whereby to allow suture to be loaded into the eyelet through the slot.
16. The suture anchor system of claim 12 wherein the suture receiver comprises a notch at the distal end of the anchor, the notch being separate from the collapsible loop such that tissue suture in the notch does not abut any moving portion of the collapsible loop.
17. The suture anchor system of claim 1 wherein the suture grasper comprises an elongated body passing through the cannulation with a suture capture mechanism distal of the suture anchor.
18. The suture anchor system of claim 17 wherein the suture capture mechanism is a loop of flexible material through which the fixed tail can be threaded.
19. The suture anchor system of claim 18 , wherein the fixed tail extends from the knot, around an outside of one side of the anchor, and through the loop of the suture capture mechanism.
20. A suture anchor system comprising:
a cannulated suture anchor having a post disposed at a distal end thereof;
a collapsible suture loop disposed around the post, the collapsible loop having a sliding knot and a fixed tail extending from the knot; and
a suture grasper having an elongate flexible threading wire, the elongate flexible threading wire being disposed through the cannulated portion of the cannulated suture anchor such that a proximal end of the wire extends out of a proximal end of the cannulated suture anchor and a distal end of the wire includes a suture capture loop formed from the wire that is disposed distal of the suture anchor.
21. The suture anchor system of claim 20 , wherein the fixed tail is looped through the collapsible loop.
22. The suture anchor system of claim 20 , wherein the fixed tail extends from the knot, around an outside of one side of the anchor, and through the distal suture capture loop.
23. The suture anchor system of claim 20 , wherein the collapsible suture loop is defined by the sliding knot, the system further comprising a collapsing tail extending from the knot.
24. The suture anchor system of claim 23 , wherein the collapsing tail is configured such that tension applied thereto collapses the loop and the collapsible loop and the collapsing tail extend proximally out of the cannulation.
25. The suture anchor system of claim 20 , wherein the sliding knot is disposed proximal of the post.
26. The suture anchor system of claim 20 , further comprising bone engaging protrusions about the suture anchor.
27. The suture anchor system of claim 20 , wherein the anchor has an elongated cylindrical shape whereby to be fixedly received within a hole drilled into a bone.
28. The suture anchor system of claim 20 wherein the collapsible suture loop has a lower coefficient of friction than the fixed tail.