Expandable intramedullary rod
First Claim
Patent Images
1. An expandable rod sized for insertion into a patient'"'"'s bone, the expandable rod comprising:
- a shaft having a first end and a second end, wherein a portion of the shaft comprises a flat surface and a plurality of teeth comprising blocking faces oriented towards the first end of the shaft;
an expansion member coupled to and adjustable along the shaft between a first, contracted state and a second, expanded state, the expansion member configured to expand radially outwardly from the contracted state to the expanded state, the expansion member including a first expansion segment and a second expansion segment, the first expansion segment having a higher slenderness ratio than the second expansion segment; and
an actuator coupled to one end of the expansion member, wherein the actuator comprises;
a central channel that receives the shaft such that the actuator is moveable along the shaft to adjust the expansion member between the contracted state and the expanded state;
a cam biased toward the shaft and configured to slide over the plurality of teeth as the actuator moves along the shaft toward the first end and to catch on the blocking faces to prevent the actuator from moving toward the second end of the shaft;
a release button configured to, when pressed, cause the cam to disengage from one of the blocking faces of the plurality of teeth to allow the actuator to move toward the second end of the shaft; and
first and second circular surfaces connected by a cylindrical surface,wherein the central channel is aligned with and passes through a center of the first circular surface and a center of the second circular surface,wherein the release button is arranged in a slot in and protrudes radially outward from the cylindrical surface, andwherein the central channel comprises a flat wall that cooperates with the flat surface of the shaft to prevent the actuator and the shaft from rotating relative to one another.
1 Assignment
0 Petitions
Accused Products
Abstract
An expandable rod is provided that is sized for insertion into a patient'"'"'s bone. A method for using the expandable rod to prepare the patient'"'"'s bone to receive an orthopedic implant is also provided. The expandable rod is adjustable between a first, contracted state and a second, expanded state, the expansion member expanding radially outwardly from the contracted state to the expanded state.
-
Citations
19 Claims
-
1. An expandable rod sized for insertion into a patient'"'"'s bone, the expandable rod comprising:
-
a shaft having a first end and a second end, wherein a portion of the shaft comprises a flat surface and a plurality of teeth comprising blocking faces oriented towards the first end of the shaft; an expansion member coupled to and adjustable along the shaft between a first, contracted state and a second, expanded state, the expansion member configured to expand radially outwardly from the contracted state to the expanded state, the expansion member including a first expansion segment and a second expansion segment, the first expansion segment having a higher slenderness ratio than the second expansion segment; and an actuator coupled to one end of the expansion member, wherein the actuator comprises; a central channel that receives the shaft such that the actuator is moveable along the shaft to adjust the expansion member between the contracted state and the expanded state; a cam biased toward the shaft and configured to slide over the plurality of teeth as the actuator moves along the shaft toward the first end and to catch on the blocking faces to prevent the actuator from moving toward the second end of the shaft; a release button configured to, when pressed, cause the cam to disengage from one of the blocking faces of the plurality of teeth to allow the actuator to move toward the second end of the shaft; and first and second circular surfaces connected by a cylindrical surface, wherein the central channel is aligned with and passes through a center of the first circular surface and a center of the second circular surface, wherein the release button is arranged in a slot in and protrudes radially outward from the cylindrical surface, and wherein the central channel comprises a flat wall that cooperates with the flat surface of the shaft to prevent the actuator and the shaft from rotating relative to one another. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. An expandable rod sized for insertion into a patient'"'"'s bone, the expandable rod comprising:
-
a shaft having a first end and a second end, wherein a portion of the shaft comprises a flat surface and a plurality of teeth comprising blocking faces oriented towards the first end of the shaft; an expansion member coupled to and adjustable along the shaft between a first, contracted state and a second, expanded state, the expansion member configured to expand radially outwardly from the contracted state to the expanded state, the expansion member including a first expansion segment and a second expansion segment, the first expansion segment having a higher slenderness ratio than the second expansion segment; and an actuator coupled to one end of the expansion member, wherein the actuator comprises; a central channel that receives the shaft such that the actuator is moveable along the shaft to adjust the expansion member between the contracted state and the expanded state, wherein the central channel comprises a flat wall that cooperates with the flat surface of the shaft to prevent the actuator and the shaft from rotating relative to one another; and a cam biased toward the shaft and configured to slide over the plurality of teeth as the actuator moves along the shaft toward the first end and to catch on the blocking faces to prevent the actuator from moving toward the second end of the shaft; and a guide component coupled to the expandable rod, the guide component configured to reference an exterior surface of the patient'"'"'s bone when the expandable rod is positioned within an intramedullary canal of the patient'"'"'s bone.
-
-
12. An expandable rod sized for insertion into a patient'"'"'s bone, the expandable rod comprising:
-
an expansion member having a first end and a second end; a shaft coupled to the expansion member, wherein a portion of the shaft comprises a flat surface and a plurality of teeth comprising blocking faces oriented towards the first end of the expansion member; and an actuator moveably coupled to the shaft and to the second end of the expansion member, the actuator configured to move the second end of the expansion member axially toward the first end of the expansion along the shaft member to compress the expansion member axially and to expand the expansion member radially outwardly, the first end of the expansion member configured to expand before the second end of the expansion member expands, wherein the actuator comprises; a central channel that receives the shaft; and a cam biased toward the shaft and configured to slide over the plurality of teeth as the actuator moves along the shaft toward the first end of the expansion member and to catch on the blocking faces to prevent the actuator from moving toward the second end of the expansion member; a release button configured to, when pressed, cause the cam to disengage from one of the blocking faces of the plurality of teeth to allow the actuator to move toward the second end of the shaft; and first and second circular surfaces connected by a cylindrical surface, wherein the central channel is aligned with and passes through a center of the first circular surface and a center of the second circular surface, wherein the release button is arranged in a slot in and protrudes radially outward from the cylindrical surface, and wherein the central channel comprises a flat wall that cooperates with the flat surface of the shaft to prevent the actuator and the shaft from rotating relative to one another. - View Dependent Claims (13, 14, 15, 16)
-
-
17. An expandable rod sized for insertion into a patient'"'"'s bone, the expandable rod comprising:
-
a shaft having a first end and a second end, wherein a portion of the shaft comprises a flat surface and a plurality of teeth comprising blocking faces oriented towards the first end of the shaft; a braided construct expansion member coupled to the shaft and adjustable between a first, contracted state and a second, expanded state, the expansion member configured to expand radially outwardly from the contracted state to the expanded state, the expansion member including a first expansion segment and a second expansion segment, the first expansion segment having a higher slenderness ratio than the second expansion segment; an intermediate segment located axially between the first and second expansion segments configured to restrict expansion of the expansion member between the first and second expansion segments; and an actuator coupled to one end of the expansion member, wherein the actuator comprises; a central channel that receives the shaft such that the actuator is moveable along the shaft to move the actuator from the second end toward the first end to compress the expansion member axially toward the first end of the shaft to adjust the expansion member between the contracted state and the expanded state, the first expansion segment configured to expand before the second expansion segment expands; a cam biased toward the shaft and configured to slide over the plurality of teeth as the actuator moves along the shaft toward the first end and to catch on the blocking faces to prevent the actuator from moving toward the second end of the shaft; a release button configured to, when pressed, cause the cam to disengage from one of the blocking faces of the plurality of teeth to allow the actuator to move toward the second end of the shaft; and first and second circular surfaces connected by a cylindrical surface, wherein the central channel is aligned with and passes through a center of the first circular surface and a center of the second circular surface, wherein the release button is arranged in a slot in and protrudes radially outward from the cylindrical surface, and wherein the central channel comprises a flat wall that cooperates with the flat surface of the shaft to prevent the actuator and the shaft from rotating relative to one another. - View Dependent Claims (18, 19)
-
Specification