Apparatus and methods for bone repair preparation
Apparatus and methods for preparing a fractured bone for repair. Preparing the bone may include fracture reduction. Preparing the bone may include holding a fracture in reduction. Preparing the bone may include identifying locations for obtaining access to an interior region of the bone. The apparatus may include structures outside the bone that interact with fragments of the bone. The structures may participate in the reduction. The structures may participate in holding the reduction. The structures may participate in identifying the locations.
1. Apparatus for reducing a fracture of a bone, the apparatus comprising:
a bridging member that defines a first receptacle and a second receptacle, the bridging member spanning from the first receptacle to the second receptacle;
a channel within the bridging member;
a pressure distribution member that is slidable in the channel between an unlock position and a lock position; and
a base rigidly affixed to the bridging member, the base comprising a collar that defines a third receptacle;
wherein:
the first receptacle is configured to receive a first bone penetrating element at a position, operatively external to the bone, on the first bone penetrating element;
the second receptacle is configured to receive a second bone penetrating element at a position, operatively external to the bone, on the second bone penetrating element;
the third receptacle is configured to receive a third bone penetrating element at a position, operatively external to the bone, on the third bone penetrating element;
in the unlock position, the bridging member is moveable relative to the first and the second bone penetrating elements, and
in the lock position;
the pressure distribution member is configured to fix the bridging member relative to the first and the second bone penetrating elements; and,
the base is configured to move along the third bone penetrating element and bend the third bone penetrating element along a length of the third bone penetrating element, the length extending between the bone and the base.
2. The apparatus of claim 1 , wherein, the base is configured to move along the third bone penetrating element and adjust an angle of the first bone penetrating element relative to a segment of the third bone penetrating element.
3. The apparatus of claim 2 wherein, the length of the third bone penetrating element is a first length;
the base is configured to bend the third bone penetrating element along the first length; and
the collar is configured to maintain a second length of the third bone penetrating element substantially parallel to the first and the second bone penetrating elements.
4. The apparatus of claim 1 wherein:
the first receptacle comprises a first pass-through and a second pass-through; and
the second receptacle comprises a first pass-through and a second pass-through;
wherein the first pass-throughs are spaced apart from the second pass-throughs by a depth of the channel.
5. The apparatus of claim 1 wherein the pressure distribution member is configured to slide within the channel from the unlock position to the lock position and simultaneously apply pressure to:
the first bone penetrating element when the first bone penetrating element is within the first receptacle; and
the second penetrating element when the second bone penetrating element is within the second receptacle.
6. The apparatus of claim 1 further comprising a set screw that is configured to maintain the pressure distribution member in the lock position.
7. The apparatus of claim 1 wherein the pressure distribution member defines a first pass-through that corresponds to the first receptacle and defines a second pass-through that corresponds to the second receptacle.
8. The apparatus of claim 7 wherein:
the first pass-through of the pressure distribution member comprises a wide end that has a diameter greater than or equal to a diameter of the first receptacle; and
the second pass-through of the pressure distribution member comprises a wide end that has a diameter greater than or equal to a diameter of the second receptacle.
9. The apparatus of claim 7 wherein:
the first pass-through of the pressure distribution member comprises a narrow end that has a diameter less than the diameter of the first receptacle; and
the second pass-through of the pressure distribution member comprises a narrow end that has a diameter less than the diameter of the second receptacle.
10. The apparatus of claim 9 wherein, in the unlock position:
the wide end of the first pass-through of the pressure distribution member is aligned with the first receptacle; and
the wide end of the second pass-through of the pressure distribution member is aligned with the second receptacle.
11. The apparatus of claim 10 wherein:
the first bone penetrating element defines a first longitudinal axis;
the second bone penetrating element defines a second longitudinal axis; and,
in the unlock position, the first bone penetrating element is moveable along the first longitudinal axis and the second bone penetrating element is moveable along the second longitudinal axis.
12. The apparatus of claim 11 wherein, in the unlock position, the first bone penetrating element is rotatable about the first longitudinal axis and the second bone penetrating element is rotatable about the second longitudinal axis.
13. The apparatus of claim 12 wherein, in the lock position, the pressure distribution member is configured to fix each of the first and second bone penetrating elements longitudinally and rotationally relative to the bridging member.
14. The apparatus of claim 9 wherein, in the lock position:
the narrow end of the first pass-through of the pressure distribution member is configured to apply pressure to the first bone penetrating element in the first receptacle; and
the narrow end of the second pass-through of the pressure distribution member is configured to apply pressure to the second bone penetrating element in the second receptacle.
15. The apparatus of claim 14 wherein, the pressure applied to the first and the second bone penetrating elements is configured to fix the first and the second bone penetrating elements relative to the bridging member.
16. The apparatus of claim 1 wherein, the channel is a first channel, the apparatus further comprising a second channel and the collar is slidably mounted in the second channel.
17. The apparatus of claim 16 further comprising a length lock configured to fix a position of the collar along the second channel.
18. The apparatus of claim 1 further comprising an elevation lock configured to fix the base along the third bone penetrating element.
19. The apparatus of claim 18 , the base further comprising a third channel and the elevation lock is configured to slide in the third channel in response to movement of the collar in the second channel.
20. The apparatus of claim 1 further comprising a support that rigidly fixes the base to the bridging member.
21. The apparatus of claim 20 wherein the support defines a recess that is configured to provide unobstructed imaging of the fracture.
22. Apparatus for reducing a fracture of a bone, the bone comprising a first segment, a second segment and a third segment, the apparatus comprising:
a bridging member:
defining a first receptacle that is configured to receive a first bone penetrating element at a position, operatively external to the first segment, on the first bone penetrating element when the first bone penetrating element is inserted into the first segment;
defining a second receptacle that is configured to receive a second bone penetrating element at a position, operatively external to the second segment, on the second bone penetrating element when the second bone penetrating element is inserted into the second segment; and
comprising a pressure source that is configured to fix a position of the bridging member relative to the first and the second bone penetrating elements;
a base rigidly joined to the bridging member, the base comprising a channel extending along a longitudinal axis of the base;
a collar that is slidable in the channel, the collar defining a third receptacle that is configured to receive a third bone penetrating element at a first position, operatively external to the third segment, on the third bone penetrating element when the third bone penetrating element is inserted into the third segment; and
a length lock that is configured to fix a position of the collar along the channel;
wherein, in operation, when the bridging member is fixed with respect to the first and the second bone penetrating elements and the collar is fixed at the position along the channel, the collar is configured to move along the third bone penetrating element and bend the third bone penetrating element at a second position, operatively external to the third segment, on the third bone penetrating element.
23. The apparatus of claim 22 wherein the channel is a first channel, the base comprising:
a second channel that extends along the longitudinal axis and is substantially perpendicular to the first channel; and
an elevation lock that is configured to:
slide in the second channel when the collar slides in the first channel; and
fix a position of the collar on the third bone penetrating element.
24. The apparatus of claim 22 wherein the length lock comprises a set screw that is in mechanical communication with the collar, and rotation of the set screw is configured to move the collar along the first channel.
25. The apparatus of claim 22 , wherein, the bone is a first bone, a support that rigidly joins the base to the bridging member defines a fourth receptacle that is configured to:
receive a fourth bone penetrating element; and
direct the fourth bone penetrating element into a second bone.
26. The apparatus of claim 25 wherein the first bone is a radius and the second bone is an ulna.