Guiding device and method of using thereof
A bone drill guiding device including a drill entry part comprising a cannula having a distal end portion and sized to receive a bone drill, a drill exit part comprising a fixation tip portion and a coupling that rigidly couples the drill entry part and the drill exit part so that longitudinal axes of the cannula distal portion and the fixation tip portion are arranged on a single mutual axis. In some embodiments, the coupling is a linear sliding coupling that parallels the single mutual axis.
1. A bone drill guiding device, comprising:
a drill entry part comprising at least one curved cannula having a distal end portion having a longitudinal axis and a cannula tip and sized to receive a bone drill;
a drill exit part comprising a fixation tip portion comprising a fixation tip having a longitudinal axis; and
a coupling that rigidly couples said drill entry part and said drill exit part so that said longitudinal axis of said cannula distal end portion of each said at least one curved cannula and said longitudinal axis of said fixation tip portion are arranged along a single mutual axis extending between said cannula tip and said fixation tip,
wherein said coupling comprises a drill entrance side part linear connecting portion and a drill exit side part connecting portion,
wherein said drill exit side part connecting portion comprises an opening sized and fitted to slidingly receive said drill entrance side part linear connecting portion.
2. The bone drill guiding device according to claim 1 , wherein said coupling includes a locking mechanism to selectively lock said drill entry part to said drill exit part.
3. The bone drill guiding device according to claim 2 , wherein said locking mechanism is adjustable.
4. The bone drill guiding device according to claim 3 , wherein said adjustable locking mechanism includes a stopper that engages with one or more cooperating teeth positioned on one of:
said drill entry part; and
said drill exit part.
5. The bone drill guiding device according to claim 1 , wherein said coupling includes a ratchet-type coupling.
6. The bone drill guiding device according to claim 1 , wherein said linear connecting portion slides within said opening along an axis parallel to said single mutual axis.
7. The bone drill guiding device according to claim 1 , wherein said cannula distal end portion is configured to be placed on a surface of a bone and said fixation tip portion is configured to be placed on skin.
8. The bone drill guiding device according to claim 1 , wherein said fixation tip portion comprises at least one marker that marks an expected drill exit point, wherein said at least one marker has a ring geometry which is coaxial with said single mutual axis.
9. The bone drill guiding device according to claim 8 , wherein said ring defines a perimeter within which the drill is expected to exit.
10. The bone drill guiding device according to claim 8 , wherein a diameter of said ring depends on a bending tolerance of said drill.
11. The bone drill guiding device of claim 8 wherein a said marker comprises a sharp end adapted for positioning at a patient's bone.
12. The bone drill guiding device according to claim 1 , wherein said drill guiding device comprises an indicator that indicates the spatial relationship between said longitudinal axes of said cannula distal end portion and said fixation tip portion.
13. The bone drill guiding device according to claim 12 , wherein a portion of at least one of the drill entry part and the drill exit part comprises said indicator.
14. The bone drill guiding device according to claim 12 , wherein said drill entry part comprises a linear connecting portion including said indicator.