Clamping device for bone fixation elements
View Patent ↗A device for clamping fixation elements, which have been inserted into bone, for manipulating fragments of a fractured bone. The device incorporating a hollow body with a cavity having a wall, a clamping body moveable within the cavity between a first position and a second position, and a clamping device operably connected to the clamping body for moving the clamping body between the first position and the second position. The device being sized and configured so that when the clamping body is in the first position a free end of the fixation element(s) may be positioned between the clamping body and the wall of the cavity. Once the fixation element(s) is properly positioned within the cavity, the clamping device may be used to move the clamping body into the cavity, thereby wedging the fixation element(s) between the clamping body and the wall of the cavity. A bone fragment may then be manipulated using the device.
1. A method for manipulating a fragment of a bone, comprising:
inserting a distal end of a bone fixation element into a fragment of a fractured bone, the bone fixation element extending longitudinally from the distal end to a proximal end;
inserting the proximal end of the bone fixation element into a distal end of a clamping device in a first position, the clamping device including a hollow body and a clamping body movable therein, the hollow body extending longitudinally from the distal end to a proximal end and including a cavity extending proximally from the distal end such that the proximal end of the bone fixation element is received between an inner wall of the cavity and an exterior surface of the clamping body; and
moving the clamping body from the first position, in which the external surface of the clamping body is separated from the inner wall of the cavity by a first distance, to a second position, in which the external surface of the clamping body is separated from the inner wall of the cavity by a second distance smaller than the first distance such that the bone fixation element is held therein.
2. The method of claim 1 , wherein the clamping body is moved from the first position to the second position by rotating a sleeve that is threadedly engaged to a proximal portion of the hollow body and connected to the clamping body via a connecting member.
3. The method of claim 1 , wherein the clamping body is moved from the first position to the second position by rotating a lever coupled to the proximal end of the hollow body and connected to the clamping body via a connecting member.
4. The method of claim 1 , further comprising moving the clamping body from the second position to a third position in which the external surface of the clamping body is separated from the inner wall of the cavity by a third distance smaller than the second distance such that the bone fixation element is firmly wedged between the inner wall and the clamping body.
5. The method of claim 4 , wherein the clamping body is moved from the first position to the second position by rotating a lever coupled to the proximal end of the hollow body and connected to the clamping body via a connecting member.
6. The method of claim 1 , wherein the exterior surface of the clamping body is rounded.
7. The method of claim 1 , wherein the inner wall of the cavity is angled relative to a longitudinal axis of the clamping device.
8. The method of claim 1 , wherein the external surface of the clamping body includes grooves for gripping the bone fixation element.
9. The method of claim 1 , wherein the bone fixation element is a Kirschner wire.