Tissue fixation system and method
A tissue fixation system is provided for dynamic and rigid fixation of tissue. A fastener connected with an elongate fastening member, such as a cable, wire, suture, rod, or tube, is moved through a passage between opposite sides of tissue. A medical device is used to secure the fastener to the elongate fastening member. The medical device includes a tensioning mechanism for tensioning the elongate fastening member. As crimping mechanism is used to secure the fastener to the elongated member, where a cutting mechanism cut the excess portion of the elongated member.
1. A tensioning device comprising:
a cannulated tube having opposite proximal and distal ends, and a longitudinal passage configured to enable an elongate member to be passed through the longitudinal passage;
a handle attached to the proximal end of the cannulated tube; and
a rotatable shaft incorporated into the handle having an axis extending generally transverse to the longitudinal passage and having an open ended slot, wherein the rotatable shaft is rotatably coupled to the cannulated tube and configured to be selectively rotatable about its axis relative to the cannulated tube,
wherein the slot in the rotatable shaft is configured to receive the elongate member such that the elongate member wraps around the rotatable shaft as the rotatable shaft rotates about its axis to apply tension to the elongate member.
2. The tensioning device of claim 1 , further comprising a locking assembly, wherein the locking assembly is configured to at least one of maintain the tension applied to the elongate member and prevent reversal of the rotatable shaft.
3. The tensioning device of claim 1 , wherein the elongate member is comprised at least in part of polyethylene.
4. The tensioning device of claim 1 , wherein the elongate member is at least one of a suture, a thread, a cable, and a tape; and at least one of threadlike, multifilament, braided, and interlaced.
5. The tensioning device of claim 1 , wherein the device is configured to be operated with a surgical robotic mechanism.
6. The tensioning device of claim 1 , further comprising a tension limiting mechanism configured to restrict tensioning of the elongate member beyond a predetermined tension limit.
7. The tensioning device of claim 1 , wherein the tensioning device is configured to secure a graft using the elongate member during anterior cruciate ligament surgery.
8. The tensioning device of claim 1 , further comprising a knob attached to the rotatable shaft.
9. The tensioning device of claim 1 , further comprising a tension indicator configured to indicate the tension being applied to the elongate member.
10. The tensioning device of claim 9 , wherein the tension indicator displays the tension measured by at least one of a sensor and a spring.
11. The tensioning device of claim 1 , further comprising a crimping mechanism positionable in the distal end of the cannulated tube, the crimping mechanism having at least one force application member configured to apply at least one external compressive force to reduce the aperture of a malleable fastener positionable in the crimping mechanism to secure the fastener to the elongate member.
12. The tensioning device of claim 1 , wherein the elongate member is configured to be secured to an anterior cruciate ligament and the tension applied to the elongate member is configured to tension the anterior cruciate ligament.
13. The tensioning device of claim 1 , wherein the elongate member is secured to an anterior cruciate ligament graft and the tension applied to the elongate member tensions the anterior cruciate ligament graft.
14. The tensioning device of claim 1 , wherein the elongate member is configured to be secured to a ligament and the tension applied to the elongate member is configured to tension the ligament.
15. The tensioning device of claim 1 , wherein the elongate member is configured to be secured to a rotator cuff tendon and the tension applied to the elongate member is configured to tension the rotator cuff tendon.
16. The tensioning device of claim 1 , wherein the elongate member is configured to be secured to a tendon and the tension applied to the elongate member is configured to tension the tendon.
17. The tensioning device of claim 1 , wherein the elongate member is secured to a graft and the tension applied to the elongate member tensions the graft.
18. The tensioning device of claim 1 , wherein the elongate member is secured to at least one of a fastener and an anchor and the tension applied to the elongate member applies a tension to the at least one fastener and anchor.
19. The tensioning device of claim 1 , wherein the tensioning device is configured to apply a tension to the elongate member secured between at least one of a first fastener and a first anchor and at least one of a second fastener and a second anchor.
20. The tensioning device of claim 1 , further comprising a cutting mechanism configured to remove an excess of the elongate member.