Intramedullary fracture fixation devices and methods
View Patent ↗An intramedullary bone fixation device is provided with an elongate body having a longitudinal axis and an actuator to deploy at least one gripper to engage an inner surface of the intramedullary space to anchor the fixation device to the bone. Methods of repairing a fracture of a bone are also disclosed. One such method comprises inserting a fixation device into an intramedullary space of the bone to place at least a portion of the fixation device on one side of the fracture, providing rigidity across the fracture, and operating an actuator to deploy at least one gripper to engage an inner surface of the intramedullary space to anchor the fixation device to the bone. Various configurations allow a segmented device body to lock in the intramedullary space before and/or after fixation of the bone.
1. A system comprising:
an elongate body comprising at least a first aperture, a second aperture and a third aperture, the elongate body sized to be inserted within a fibula;
a first fastener configured to be inserted through the first aperture in a lateral-medial direction;
a second fastener configured to be inserted through the second aperture, the second aperture angled from the first aperture by angle alpha;
a third fastener configured to be inserted through the third aperture, the third aperture angled from the first aperture by angle beta, the third fastener having a longer length than the first fastener and the second fastener;
an actuator configured to actuate a portion of the elongate body to grip an intramedullary canal of the fibula; and
a screw clip configured to surround a portion of the first fastener, the second fastener, or the third fastener.
2. The system of claim 1 , wherein angle alpha is between 40 and 80 degrees.
3. The system of claim 1 , wherein angle beta is between 5 and 45degrees.
4. The system of claim 1 , wherein the first aperture is oblong, wherein the first fastener is configured to translate within the first aperture toward the actuator.
5. The system of claim 1 , wherein the portion comprises between one and six members configured to deflect towards the intramedullary canal.
6. The system of claim 1 , wherein the first fastener and the second fastener are sized to be contained within the fibula.
7. The system of claim 1 , wherein the third fastener is sized to extend into the tibia.
8. The system of claim 1 , wherein the third fastener is a screw or suture fixation device.
9. The system of claim 1 , further comprising a tool comprising at least a fourth aperture aligned with the first aperture, a fifth aperture aligned with the second aperture and a sixth aperture aligned with the third aperture.
10. The system of claim 9 , wherein the tool is configured to facilitate translation of the first fastener within the first aperture to reduce a distance between a first bone segment and a second bone segment.
11. The system of claim 1 , further comprising a reamer comprising a shank and a cutting head, the reamer having a smaller shank than the cutting head to increase flexibility.
12. A system comprising:
an elongate body comprising at least a first aperture, a second aperture and a third aperture, the elongate body sized to be inserted within a fibula;
a first fastener configured to be inserted through the first aperture in a lateral-medial direction;
a second fastener configured to be inserted through the second aperture, the second aperture angled from the first aperture by angle alpha;
a third fastener configured to be inserted through the third aperture, the third aperture angled from the first aperture by angle beta, the third fastener having a longer length than the first fastener and the second fastener; and
an actuator configured to actuate a portion of the elongate body to grip an intramedullary canal of the fibula;
a screw clip configured to surround a portion of the first fastener, the second fastener, or the third fastener, wherein the system is configured such that as a fastener is driven into a bone, the head of the fastener tilts the screw clip away from the bone.
13. A system comprising:
an elongate body comprising at least a first aperture and a second aperture, the elongate body sized to be inserted within a fibula, the elongate body comprising a distal end and a proximal end;
a first fastener configured to be inserted through the first aperture, wherein the first fastener is configured to be inserted into the first aperture near the proximal end of the elongate body and wherein the first fastener is configured to be translated toward the distal end of the elongate body while within the first aperture;
a second fastener configured to be inserted through the second aperture, the second fastener angled from the first fastener by angle alpha when the first fastener is inserted through the first aperture and the second fastener is inserted through the second aperture; and
a portion of the elongate body configured to grip an intramedullary canal of the fibula;
wherein the system comprises a third fastener, wherein the third fastener is configured for syndesmosis fixation; and
a screw clip configured to surround a portion of the first fastener, the second fastener, or the third fastener.
14. The system of claim 13 , wherein the third fastener is angled from the first fastener by angle beta, wherein angle beta is between 5 and 45 degrees.
15. The system of claim 13 , wherein angle alpha is between 40 and 80 degrees.
16. The system of claim 13 , further comprising an actuator configured to actuate the portion of the elongate body configured to grip the intramedullary canal.