Bone fracture fixation clamp
View Patent ↗A bone fixation clamp includes a first arcuate clamp member conforming to a shape of a bone and extending between a first connection end and a first free end, a second arcuate clamp member conforming to a shape of the bone, a second connection end of the second clamp member being pivotally attached to the first clamp member, the second clamp member extending between the second connection end and a second free end and a driving member received in the first clamp member passing out of the first clamp member to abut an abutment portion of the second member so that, as the driving member is extended further out of the first member, the driving member pivots the second clamp member relative to the first clamp member to draw the first and second free ends toward one another to apply a radially compressive force to the bone.
1. A bone fixation clamp for implantation in a living body, comprising:
a first arcuate clamp member configured to clamp, the first arcuate clamp member conforming to a shape of a target portion of a bone and extending between a first connection end and a first free end;
a second arcuate clamp member configured to clamp bone, the second arcuate clamp member conforming to a shape of the target portion of the bone, a second connection end of the second clamp member being pivotally attached to the first connection end of the first clamp member, the second clamp member extending between the second connection end and a second free end; and
a driving member including a first end received in the first clamp member and passing out of the first clamp member to abut an abutment portion on an outer surface of the second member so that, as the first end of the driving member is extended further out of the first member, the driving member applies force to the abutment portion pivoting the second clamp member relative to the first clamp member to draw the first and second free ends toward one another to apply a radially compressive force to the bone.
2. The bone fixation clamp of claim 1 , wherein the first and second clamp members are pivotally attached to one another by a pin so that the first and second clamp members are pivotable about a pin axis of the pin.
3. The bone fixation clamp of claim 2 , wherein the pin is laser welded to the first and second clamp members.
4. The bone fixation clamp of claim 1 , wherein the driving member is received within a channel extending through the first clamp member along a channel axis extending substantially orthogonal to a longitudinal axis of the bone.
5. The bone fixation clamp of claim 4 , wherein a portion of the channel is threaded to threadedly engage threads of the driving member.
6. The bone fixation clamp of claim 4 , wherein the abutment portion extends out of the second clamp member to intersect the channel axis.
7. The bone fixation clamp of claim 6 , wherein a free end of the driving member is substantially blunt.
8. The bone fixation clamp of claim 4 , wherein a first portion of the channel has a diameter selected to slidably receive an enlarged diameter portion of the driving member, a second portion of the channel having a diameter reduced with respect to the first portion of the channel to prevent insertion of the enlarged diameter portion of the driving member into the second portion of the channel.
9. The bone fixation clamp of claim 1 , further comprising a relief recess formed on one of the first and second clamp members, the relief recess being configured to receive a bone plate therein such that, when the first and second clamp members are secured to the bone, the bone plate is fictionally held against the bone.
10. The bone fixation clamp of claim 9 , wherein the relief recess includes an opening extending therethrough, the opening aligning with a bone plate hole extending through the bone plate to permit insertion of a bone fixation element therethrough and into the bone.
11. The bone fixation clamp of claim 1 , wherein the first and second clamp members are biased to a radially expanded configuration.