Methods and devices for repairing meniscal tissue
Methods and devices are provided for repairing a tear in a meniscus. A pair of fixation member each entailing a preformed knot configuration coupled together by a suture length. The fixation members are placed on the meniscal tissue with the suture length spanning the tear, the knot configurations are expanded to form anchoring knots and the suture length is shortened to close the tear.
1. A method of repairing a tear in a meniscus comprising the steps of:
selecting a suture length, wherein the suture length comprises a first preformed knot, a second preformed knot, and a bridge extending therebetween;
placing the first preformed knot at a first location adjacent the tear in the meniscus;
placing the second preformed knot at a second location adjacent the tear in the meniscus with the bridge passing through the meniscus and across the tear;
expanding the first preformed knot configuration into a first anchoring knot;
expanding the second preformed knot configuration into a second anchoring knot; and
shortening the length of the bridge to close the tear.
2. The method of claim 1 wherein the bridge between the first preformed knot and the second preformed knot comprises a loop having a slip knot and wherein the step of shortening the length of suture between the first preformed knot and the second preformed knot comprising sliding the slip knot so as to at least partially close the loop.
3. The method of claim 2 wherein the slip knot is located at one of the first preformed knot and the second preformed knot and does not move from that location during the step of sliding the slip knot.
4. The method of claim 1 wherein the meniscus has a first surface facing a femur and a second surface facing laterally or medially and away from the femur and wherein the first location and the second location are chosen on the second surface.
5. The method of claim 4 wherein the length of suture is passed over a portion of the first surface.
6. The method of claim 5 wherein the step of placing the first preformed knot at the first location comprises passing a cannulated needle through the meniscus from the first surface to the second surface and ejecting the first preformed knot at the first location.
7. The method of claim 6 wherein the step of expanding the first preformed knot configuration comprises tensioning a suture tail extending therefrom with respect to the first preformed knot.
8. The method of claim 7 and further comprising placing an abutment associated with the cannulated needle against the first preformed knot while tensioning the suture tail.
9. The method of claim 7 wherein the suture tail comprises the suture length.