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 medical device for securing a fastener to an elongate member, comprising:
a handle;
a tubular member including first and second ends and defining a longitudinal passage along a central longitudinal axis, wherein the first end is slidably disposed in the handle;
a tensioning mechanism disposed on the handle for tensioning the elongate member; and
a crimp mechanism disposed in the second end of the tubular member for crimping the fastener about the elongate member.
2. A medical device as set for the in claim 1 , wherein the crimp mechanism comprises:
a collet positioned in the first end of the tubular member and defining a collet passage longitudinally aligned with the central longitudinal axis, wherein an end portion of the collet is configured to receive the fastener.
3. A medical device as set forth in claim 2 , wherein the collet includes first and second collet arms each having a force application end portions combining to form a fastener aperture, the fastener aperture being configured to receive the fastener therein.
4. A medical device as set forth in claim 3 , wherein the crimping mechanism comprises a collet closer affixed to the second end of the tubular member, about the collet, the tubular member and the collet closer being moveable from a first tube position to a second tube position such that the collet closer compresses the force application end portions of the first and second collet arms about the fastener aperture.
5. A medical device as set forth in claim 4 , further comprising a trigger operably connected to the tubular member, the trigger positionable from a first trigger position to a second trigger position with respect to the handle, such that the collet closer is moved from the first tubular position to the second tubular position.
6. A medical device as set forth in claim 5 , further comprising a trigger bias member interposed between the trigger and the handle, wherein the trigger bias member biases the trigger into the first trigger position.
7. A medical device as set forth in claim 6 , further comprising a cutting mechanism disposed in the second end of the tubular member, proximal to the collet, and operably connect to the trigger, such that movement of the trigger from the second trigger position to a third trigger position actuates the cutting mechanism.
8. A medical device as set forth in claim 5 , wherein the tensioning mechanism further including a torque controller.
9. A medical device as set forth in claim 1 , the tensioning mechanism comprising a locking assembly and a rotation assembly.