Dynamic knee balancer with opposing adjustment mechanism
First Claim
1. A device for performing a minimally invasive procedure on a knee, the device comprising a femoral assembly engageable with a distal femur, the femoral assembly comprising:
- a stationary femoral member removably attachable to a distal femur;
an adjustable femoral member movably coupled with the stationary member to adjust tension in at least one ligament of or adjacent the knee, the adjustable femoral member including a medial portion and a lateral portion and at least one positioning feature that moves relative to the distal femur as the adjustable femoral member is adjusted and thus identifies at least one position on the distal femur for facilitating completion of the surgical procedure to enhance at least one of range of motion, stability or patella tracking of the knee, wherein the adjustable femoral member is configured to be movably couplable with a tibial member engaged with a proximal tibia to allow the knee to be moved through a range of motion without removing the femoral and tibial members; and
an adjustment mechanism coupled to the femoral assembly, the mechanism including an actuator, the actuator positioned proximate the medial or the lateral portion of the adjustable femoral member, the actuator configured to adjust an opposite portion of the adjustable member to adjust tension in the at least one ligament, wherein the stationary member and the adjustable member are pivotally coupled.
1 Assignment
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Accused Products
Abstract
A device for performing a surgical procedure on a knee comprises a femoral assembly comprising a stationary femoral member attachable to the distal femur, an adjustable femoral member movably coupled with the stationary member to adjust tension in at least one ligament of or adjacent the knee and an adjustment mechanism coupled to the assembly. The adjustable member includes at least one positioning feature that moves relative to the distal femur as the adjustable member is adjusted and identifies at least one position on the distal femur. The adjustable member is movably couplable with a tibial member engaged with a proximal tibia to allow the knee to be moved through a range of motion without removing the femoral and tibial members. The mechanism includes an actuator positioned proximate a medial or lateral portion of the adjustable member. The actuator is configured to adjust an opposite portion of the adjustable member.
158 Citations
60 Claims
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1. A device for performing a minimally invasive procedure on a knee, the device comprising a femoral assembly engageable with a distal femur, the femoral assembly comprising:
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a stationary femoral member removably attachable to a distal femur; an adjustable femoral member movably coupled with the stationary member to adjust tension in at least one ligament of or adjacent the knee, the adjustable femoral member including a medial portion and a lateral portion and at least one positioning feature that moves relative to the distal femur as the adjustable femoral member is adjusted and thus identifies at least one position on the distal femur for facilitating completion of the surgical procedure to enhance at least one of range of motion, stability or patella tracking of the knee, wherein the adjustable femoral member is configured to be movably couplable with a tibial member engaged with a proximal tibia to allow the knee to be moved through a range of motion without removing the femoral and tibial members; and an adjustment mechanism coupled to the femoral assembly, the mechanism including an actuator, the actuator positioned proximate the medial or the lateral portion of the adjustable femoral member, the actuator configured to adjust an opposite portion of the adjustable member to adjust tension in the at least one ligament, wherein the stationary member and the adjustable member are pivotally coupled. - 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, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53)
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54. A device for performing a minimally invasive procedure on a knee, the device comprising a femoral assembly, the femoral assembly comprising:
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a stationary femoral member for removably attachable to a distal femur; and an adjustable femoral member movably coupled with the stationary member to adjust tension in at least one ligament of or adjacent the knee, the adjustable femoral member comprising a medial portion and lateral portion and at least one positioning feature that moves relative to the distal femur as the adjustable femoral member is adjusted and thus identifies at least one position on the distal femur for facilitating completion of the surgical procedure to enhance at least one of range of motion, stability or patella tracking of the knee; and a self adjustment mechanism coupled to the femoral assembly, the adjustment means configured to adjust the adjustable femoral member responsive to a tension of the at least one ligament; wherein the adjustable femoral member is configured to be movably couplable with a tibial member engaged with a proximal tibia to allow the knee to be moved through a range of motion without removing the femoral and tibial members and wherein the self-adjustment mechanism comprises a plurality of pre-adjusted femoral members, each having a different asymmetry relative to the stationary member, wherein one of the pre-adjusted members is selected to provide a desired range of motion when the surgical procedure is completed. - View Dependent Claims (55, 56, 57, 58, 59, 60)
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Specification