Knotted suture end effector
A suture including a knotted end effector is provided. The suture includes a body portion defining a longitudinal axis and an end effector formed from the body portion. The end effector includes first and second extensions which extend outwardly from the longitudinal axis in opposite directions when the end effector is in a permanent configuration. The extensions of the end effector extend substantially along the longitudinal axis when the end effector is in a temporary position. In embodiments, at least a portion of the end effector includes a shape memory material.
1. A method of forming an end effector, the method comprising the steps of:
providing a length of suture and a fixture;
crossing a first end of the suture over a second end of a suture to form a first loop;
wrapping the first end of the suture around the suture within the first loop “n” number of times to form an “n” number of throws;
positioning the suture adjacent the fixture such that the fixture is positioned between the first loop and the first end;
wrapping the first end of the suture around the fixture to form a second loop;
wrapping the first end of the suture around the suture within the first loop “m” number of times to form an “m” number of throws;
pulling the first and second ends in opposite directions to tighten the first and second loops about the fixture;
threading the first end of the suture through the second loop to form a third loop;
threading the second end of the suture through the second loop to form a fourth loop;
removing the suture from the fixture;
pulling the third and fourth loops in opposite directions to tighten the first and second loops; and
pulling the first and second ends of the suture in opposite directions to tighten the third and fourth loops.
2. The method of claim 1 , further including the step of trimming the first end of the suture.
3. The method of claim 1 , wherein the fixture includes a channel for receiving the first and second ends of the suture.
4. The method of claim 1 , wherein the step of threading the first end of the suture through the second loop is performed from a top of the second loop down.
5. The method of claim 1 , wherein the step of threading the first end of the suture through the second loop is performed from a bottom of the second loop up.
6. The method of claim 1 , wherein the step of threading the second end of the suture through the second loop is performed from a top of the second loop down.
7. The method of claim 1 , wherein the step of threading the second end of the suture through the second loop is performed from a bottom of the second loop up.
8. The method of claim 1 , wherein “n” and “m” are equal.
9. The method of claim 1 , wherein “n” and “m” are not equal.
10. The method of claim 1 , wherein “n” equals three (3).
11. The method of claim 1 , wherein “m” equals three (3).
12. The method of claim 1 , wherein the suture is formed of a degradable material.
13. The method of claim 1 , wherein the suture includes a needle on one of the first or second ends.
14. The method of claim 1 , wherein the step of positioning the suture adjacent the fixture includes positioning the fixture within a V-shaped notch located between the first loop and the first end.
15. The method of claim 1 , wherein the fixture includes a channel for facilitating the steps of threading the first and second ends of the suture through the second loop to form the third and fourth loops.