Dynamic knee balancer with pressure sensing
First Claim
1. A method for sensing pressure in a knee during a surgical procedure on the knee, the method comprising:
- engaging femoral and tibial portions of a knee adjustment device with the knee;
sensing pressure exerted by the femoral and tibial portions against one another using at least one sensor coupled with at least one of the femoral or tibial portion;
displaying data describing the sensed force; and
adjusting at least one of the rotational orientation or anterior/posterior orientation of the femoral portion of the knee adjustment device to separately adjust dynamic tension in the lateral and medial collateral ligaments adjacent the knee,wherein adjusting affects the force exerted by the femoral and tibial portions against one another,wherein a stationary femoral member of the femoral portion of the knee adjustment device engages a distal femur of the knee and a mobile femoral member of the knee adjustment device is moveably coupled to the stationary femoral member, andwherein adjusting at least one of the rotational orientation or anterior/posterior orientation of the femoral portion of the knee adjustment device comprises moving the mobile femoral member relative to the stationary femoral member.
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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 femoral 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.
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Citations
23 Claims
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1. A method for sensing pressure in a knee during a surgical procedure on the knee, the method comprising:
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engaging femoral and tibial portions of a knee adjustment device with the knee; sensing pressure exerted by the femoral and tibial portions against one another using at least one sensor coupled with at least one of the femoral or tibial portion; displaying data describing the sensed force; and adjusting at least one of the rotational orientation or anterior/posterior orientation of the femoral portion of the knee adjustment device to separately adjust dynamic tension in the lateral and medial collateral ligaments adjacent the knee, wherein adjusting affects the force exerted by the femoral and tibial portions against one another, wherein a stationary femoral member of the femoral portion of the knee adjustment device engages a distal femur of the knee and a mobile femoral member of the knee adjustment device is moveably coupled to the stationary femoral member, and wherein adjusting at least one of the rotational orientation or anterior/posterior orientation of the femoral portion of the knee adjustment device comprises moving the mobile femoral member relative to the stationary femoral member. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification