Knee ligament balancer
First Claim
1. An orthopaedic surgical device, comprisinga first sensor component comprising (i) a first paddle set having a first tibial paddle and a first femoral paddle that extend from the first sensor component in a general direction of extension to respectively contact a proximal tibia and a distal femur of a patient the first femoral paddle is moveable with respect to the first tibial paddle to determine a first displacement between the proximal tibia and the distal femur, (ii) a first tensor to apply a selected first force between the proximal tibia and the distal femur via the first paddle set, (iii) a first displacement scale to indicate the first displacement between the proximal tibia and the distal femur determined by the first paddle set, (iv) a housing having an upper end to which the first tibial paddle is coupled, (v) a first displacement cylinder having an upper end to which the first femoral paddle is coupled and a lower end telescopically coupled with the upper end of the housing, and (vi) a tensor cylinder having an upper end telescopically coupled with a lower end of the housing and the lower end of the first displacement cylinder, anda second sensor component coupled to the first sensor component, the second sensor component comprising a second paddle set having a second tibial paddle and a second femoral paddle that extend from the second sensor component in the general direction of extension to respectively contact the proximal tibia and the distal femur of the patient, the second femoral paddle moveable with respect to the second tibial paddle to determine a second displacement between the proximal tibia and the distal femur,wherein the first paddle set and second paddle set are moveable with respect to each other in the general direction of extension to permit selectively extending one of the paddle sets beyond the other paddle set in the general direction of extension.
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Accused Products
Abstract
An orthopaedic surgical device comprises a first sensor component and a second sensor component. Each sensor component includes a paddle set to contact a proximal tibia and a distal femur of a patient. The first sensor component and the second sensor component being movable with respect to one another to extend one paddle set beyond the other paddle set, and each paddle set includes cutouts for the clearance of the patellar tendon to avoid the need to avert the patella during use.
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Citations
18 Claims
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1. An orthopaedic surgical device, comprising
a first sensor component comprising (i) a first paddle set having a first tibial paddle and a first femoral paddle that extend from the first sensor component in a general direction of extension to respectively contact a proximal tibia and a distal femur of a patient the first femoral paddle is moveable with respect to the first tibial paddle to determine a first displacement between the proximal tibia and the distal femur, (ii) a first tensor to apply a selected first force between the proximal tibia and the distal femur via the first paddle set, (iii) a first displacement scale to indicate the first displacement between the proximal tibia and the distal femur determined by the first paddle set, (iv) a housing having an upper end to which the first tibial paddle is coupled, (v) a first displacement cylinder having an upper end to which the first femoral paddle is coupled and a lower end telescopically coupled with the upper end of the housing, and (vi) a tensor cylinder having an upper end telescopically coupled with a lower end of the housing and the lower end of the first displacement cylinder, and a second sensor component coupled to the first sensor component, the second sensor component comprising a second paddle set having a second tibial paddle and a second femoral paddle that extend from the second sensor component in the general direction of extension to respectively contact the proximal tibia and the distal femur of the patient, the second femoral paddle moveable with respect to the second tibial paddle to determine a second displacement between the proximal tibia and the distal femur, wherein the first paddle set and second paddle set are moveable with respect to each other in the general direction of extension to permit selectively extending one of the paddle sets beyond the other paddle set in the general direction of extension.
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11. An orthopaedic surgical device, comprising
a first sensor component comprising (i) a first tibial paddle and a first femoral paddle that extend from the first sensor component to respectively contact a first portion of a proximal tibia and a first condyle of a distal femur, the first femoral paddle moveable with respect to the first tibial paddle to determine a first displacement between the first portion of the proximal tibia and the first condyle of the distal femur, (ii) first tensor to apply a selected first force between the first portion of the proximal tibia and the first condyle of the distal femur via the first tibial and femoral paddles, (iii) a first displacement scale to indicate the first displacement between the first portion of the proximal tibia and the first condyle of the distal femur determined by the first tibial and femoral paddles, (iv) a first housing having an upper end to which the first tibial paddle is coupled, (v) a first displacement cylinder having an upper end to which the first femoral paddle is coupled and a lower end telescopically coupled with the upper end of the first housing, and (vi) a first tensor cylinder having an upper end telescopically coupled with a lower end of the first housing and the lower end of the first displacement cylinder, a second sensor component comprising (i) a second tibial paddle and a second femoral paddle that extend from the second sensor component to respectively contact a second portion of the proximal tibia and a second condyle of the distal femur, the second femoral paddle moveable with respect to the second tibial paddle to determine a second displacement between the second portion of the proximal tibia and the second condyle of the distal femur, (ii) a second tensor to apply a selected second force between the second portion of the proximal tibia and the second condyle of the distal femur via the second tibial and femoral paddles, (iii) a second displacement scale to indicate the second displacement between the second portion of proximal tibia and the second condyle of the distal femur determined by the second tibial and femoral paddles, (iv) a second housing having an upper end to which the second tibial paddle is coupled, (v) a second displacement cylinder having an upper end to which the second femoral paddle is coupled and a lower end telescopically coupled with the upper end of the second housing, and (vi) a second tensor cylinder having an upper end telescopically coupled with a lower end of the second housing and the lower end of the second displacement cylinder, a sliding mechanism to slideably couple the first sensor component to the second sensor component to permit selectively extending the first tibial and femoral paddles beyond the second tibial and femoral paddles.
Specification