Dynamic knee balancer with pressure sensing
First Claim
1. A system for sizing a prosthetic implant within a knee joint, the system comprising:
- a femoral portion couplable to a distal end of a femur, the femoral portion including a plurality of apertures configured to guide a drill bit to form one or more holes in the distal end of the femur;
a tibial portion couplable to a proximal end of a tibia;
a sensor housing couplable to or integrated with the femoral portion or the tibial portion and including one or more force or pressure sensors, the one or more sensors configured to measure a force or a pressure produced within the knee joint, the force or pressure generated, at least in part, by soft tissue adjacent to the knee joint; and
a plurality of shims configured to engage the femoral portion or the tibial portion and adjust the force or pressure produced, at least in part, by the soft tissue adjacent to the knee joint.
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Accused Products
Abstract
A device for performing a surgical procedure on a knee includes an adjustable femoral portion, a tibial portion and at least one sensor coupled with the femoral and/or tibial portions to sense pressure exerted by the a moral and tibial portions against one another. The femoral portion is adapted for removably coupling with a distal end of a femur to adjust tension in soft tissue adjacent the knee and has at least one positioning feature adapted to move relative to the distal end of the femur as the femoral portion is adjusted, thus helping position a femoral prosthetic on the distal end of the femur. The sensor(s) may be adapted to sense pressure at medial and lateral sides of the knee, and relative pressures may be displayed as data on a visual display. Adjustments to the femoral member may be made to balance pressure at flexion and extension of the knee.
128 Citations
12 Claims
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1. A system for sizing a prosthetic implant within a knee joint, the system comprising:
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a femoral portion couplable to a distal end of a femur, the femoral portion including a plurality of apertures configured to guide a drill bit to form one or more holes in the distal end of the femur; a tibial portion couplable to a proximal end of a tibia; a sensor housing couplable to or integrated with the femoral portion or the tibial portion and including one or more force or pressure sensors, the one or more sensors configured to measure a force or a pressure produced within the knee joint, the force or pressure generated, at least in part, by soft tissue adjacent to the knee joint; and a plurality of shims configured to engage the femoral portion or the tibial portion and adjust the force or pressure produced, at least in part, by the soft tissue adjacent to the knee joint. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A trial prosthetic device comprising:
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a femoral component configured to couple to a distal end of a femur, the femoral portion including a plurality of apertures configured to guide a drill bit to form one or more holes in the distal end of the femur; a tibial component configured to couple to a proximal end of a tibia; a sensor component integrated with the tibial component and including an articular surface for movable contact with an articular surface of the femoral component, the sensor component including one or more force or pressure sensors configured to measure a force or a pressure produced within a knee joint, the force or pressure generated, at least in part, by soft tissue adjacent to the knee joint; and a plurality of shims configured to engage the femoral component or the tibial component and adjust the force or pressure produced, at least in part, by the soft tissue adjacent to the knee joint.
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Specification