Straight intramedullary fracture fixation devices and methods
First Claim
Patent Images
1. A bone fixation device comprising:
- an elongate body having a distal threaded fixation region, a proximal hub, a tubular surface, a longitudinal inner lumen, and a wall extending between the tubular surface and the longitudinal inner lumen,the tubular surface being sized to fit within an intramedullary space within a bone,a first cannula thread extending along at least a portion of the longitudinal inner lumen;
an actuatable bone engaging mechanism disposed within the elongate body, wherein the bone engaging mechanism comprises a gripper having at least one bendable member such that as the gripper is actuated, the bendable member pivots away from the longitudinal axis of the elongate body and the gripper is deployed from a retracted configuration to an engaged configuration;
an actuator operably connected to the bone engaging mechanism to actuate the bone engaging mechanism from a disengaged configuration to the engaged configuration, wherein the actuator comprises a first ramped surface that is slideably coupled to an interior surface of the bendable member of the gripper, wherein proximally moving the first ramped surface of the actuator causes the first ramped surface to slideably engage the interior surface of said bendable member at an angle thereby pivoting the bendable member of the gripper away from the longitudinal axis away from the elongate body to deploy the bone engaging mechanism into the engaged configuration; and
a compression screw rotationally engageable with the first cannula thread, the compression screw configured to apply an axial compression to the body.
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Abstract
A straight intramedullary bone fracture fixation device is provided with an elongate body having a longitudinal axis for deployment in a long bone, such as a clavicle. Methods of repairing a fracture of a bone are also disclosed. One such method comprises inserting a bone fixation device into an intramedullary space of the bone to place at least a portion of an elongate body of the fixation device on one side of the fracture and at least a portion of a hub on another side of the fracture, and engaging an inner surface of the intramedullary space to anchor the fixation device to the bone. Various configurations and designs may be used in combination with other fixation device components.
771 Citations
19 Claims
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1. A bone fixation device comprising:
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an elongate body having a distal threaded fixation region, a proximal hub, a tubular surface, a longitudinal inner lumen, and a wall extending between the tubular surface and the longitudinal inner lumen, the tubular surface being sized to fit within an intramedullary space within a bone, a first cannula thread extending along at least a portion of the longitudinal inner lumen; an actuatable bone engaging mechanism disposed within the elongate body, wherein the bone engaging mechanism comprises a gripper having at least one bendable member such that as the gripper is actuated, the bendable member pivots away from the longitudinal axis of the elongate body and the gripper is deployed from a retracted configuration to an engaged configuration; an actuator operably connected to the bone engaging mechanism to actuate the bone engaging mechanism from a disengaged configuration to the engaged configuration, wherein the actuator comprises a first ramped surface that is slideably coupled to an interior surface of the bendable member of the gripper, wherein proximally moving the first ramped surface of the actuator causes the first ramped surface to slideably engage the interior surface of said bendable member at an angle thereby pivoting the bendable member of the gripper away from the longitudinal axis away from the elongate body to deploy the bone engaging mechanism into the engaged configuration; and a compression screw rotationally engageable with the first cannula thread, the compression screw configured to apply an axial compression to the body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A bone fixation device comprising:
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an elongate body having a distal threaded fixation region, a proximal hub, a tubular surface, a longitudinal inner lumen, and a wall extending between the tubular surface and the longitudinal inner lumen, the tubular surface being sized to fit within an intramedullary space within a bone, a first cannula thread extending along at least a portion of the longitudinal inner lumen; an actuatable bone engaging mechanism disposed within the elongate body, wherein the bone engaging mechanism comprises a gripper having at least one bendable member such that as the gripper is actuated, the bendable member pivots away from the longitudinal axis of the elongate body and the gripper is deployed from a retracted configuration to an engaged configuration; an actuator operably connected to the bone engaging mechanism to actuate the bone engaging mechanism from a disengaged configuration to the engaged configuration, wherein the actuator comprises a first ramped surface that is slideably coupled to an interior surface of the bendable member of the gripper, wherein proximally moving the first ramped surface of the actuator causes the first ramped surface to slideably engage the interior surface of said bendable member at an angle thereby pivoting the bendable member of the gripper away from the longitudinal axis away from the elongate body to deploy the bone engaging mechanism into the engaged configuration, wherein the actuator is a guidewire; and a compression screw rotationally engageable with the first cannula thread, the compression screw configured to apply an axial compression to the body. - View Dependent Claims (17, 18, 19)
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Specification