Device and method for determining force of a knee joint
First Claim
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1. A joint distractor for distracting a patient'"'"'s knee joint, the joint distractor comprising:
- a cradle extending in a longitudinal direction, the cradle being configured to receive and secure a sensor module;
a first distractor component including a first body movably coupled to a first side of the cradle and a first tibial paddle and a first femoral paddle that extend from the first body the longitudinal direction, the first tibial paddle being configured to contact a tibial paddle of the sensor module when the sensor module is positioned in the cradle and the first femoral paddle being configured to contact a distal end of a femur of a patient when the joint distractor is positioned in the patient'"'"'s knee joint between the patient'"'"'s tibia and femur;
the first femoral paddle being movable with respect to the first tibial paddle to define a first displacement between the patient'"'"'s tibia and femur; and
a second distractor component including a second body movably coupled to a second side of the cradle and a second tibial paddle and a second femoral paddle that extend from the second body the longitudinal direction, the second tibial paddle being configured to contact the tibial paddle of the sensor module when the sensor module is positioned in the cradle and the second femoral paddle being configured to contact the distal end of the femur of the patient when the joint distractor is positioned in the patient'"'"'s knee joint between the patient'"'"'s tibia and femur, the second femoral paddle being movable with respect to the second tibial paddle to define a second displacement between the patient'"'"'s tibia and femur;
wherein the first distractor component and the second distractor component are movable with respect to the cradle in the longitudinal direction to permit selectively extending one of the distractor components beyond the other distractor component in the longitudinal direction.
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Abstract
An orthopaedic surgical device for determining the joint force of a patient'"'"'s knee joint includes a tibial paddle shaped to be positioned in the patient'"'"'s knee joint and a handle extending from the tibial paddle. The tibial paddle includes a sensor array positioned therein and configured to generate sensor signals indicative of the joint force of the patient'"'"'s knee joint. The orthopaedic surgical device also includes a control circuit configured to control a display located on the handle to provide a visual indication of the medial and lateral balance of the joint force.
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Citations
20 Claims
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1. A joint distractor for distracting a patient'"'"'s knee joint, the joint distractor comprising:
- a cradle extending in a longitudinal direction, the cradle being configured to receive and secure a sensor module;
a first distractor component including a first body movably coupled to a first side of the cradle and a first tibial paddle and a first femoral paddle that extend from the first body the longitudinal direction, the first tibial paddle being configured to contact a tibial paddle of the sensor module when the sensor module is positioned in the cradle and the first femoral paddle being configured to contact a distal end of a femur of a patient when the joint distractor is positioned in the patient'"'"'s knee joint between the patient'"'"'s tibia and femur;
the first femoral paddle being movable with respect to the first tibial paddle to define a first displacement between the patient'"'"'s tibia and femur; anda second distractor component including a second body movably coupled to a second side of the cradle and a second tibial paddle and a second femoral paddle that extend from the second body the longitudinal direction, the second tibial paddle being configured to contact the tibial paddle of the sensor module when the sensor module is positioned in the cradle and the second femoral paddle being configured to contact the distal end of the femur of the patient when the joint distractor is positioned in the patient'"'"'s knee joint between the patient'"'"'s tibia and femur, the second femoral paddle being movable with respect to the second tibial paddle to define a second displacement between the patient'"'"'s tibia and femur; wherein the first distractor component and the second distractor component are movable with respect to the cradle in the longitudinal direction to permit selectively extending one of the distractor components beyond the other distractor component in the longitudinal direction. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
- a cradle extending in a longitudinal direction, the cradle being configured to receive and secure a sensor module;
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10. An orthopaedic surgical instrument for distracting a patient'"'"'s knee joint, the orthopaedic surgical instrument comprising:
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a first distractor component including a first body and a first tibial paddle and a first femoral paddle that extend from the first body in an outwardly direction along a longitudinal axis, the first femoral paddle being movable with respect to the first tibial paddle to define a first displacement between the first femoral paddle and the first tibial paddle, a second distractor component coupled to the first distractor component and including a second body and a second tibial paddle and a second femoral paddle that extend from the second body in the outwardly direction, the second femoral paddle being movable with respect to the second tibial paddle to define a second displacement between the second femoral paddle and the second tibial paddle, and a cradle positioned between the first distractor and the second distractor, the cradle extending parallel to the longitudinal axis and being configured to receive a sensor module, wherein the first distractor component and the second distractor component are movable with respect to one another along the longitudinal axis to permit selective extension of one of the first distractor component and the second distractor component beyond the other of the first distractor component and the second distractor component in the outwardly direction. - View Dependent Claims (11, 12, 13, 14, 15, 16)
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17. A joint distractor for distracting a patient'"'"'s joint, the joint distractor comprising:
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a first distractor component including a first body and a first inferior paddle and a first superior paddle that extend from the first body in an outwardly direction along a longitudinal axis, the first superior paddle being movable with respect to the first inferior paddle to define a first displacement between the first superior paddle and the first inferior paddle, a second distractor component coupled to the first distractor component and including a second body and a second inferior paddle and a second superior paddle that extend from the second body in the outwardly direction, the second superior paddle being movable with respect to the second inferior paddle to define a second displacement between the second superior paddle and the second inferior paddle, and a sensor module configured to indicate a force applied to the sensor module, the sensor module including a handle positioned between the first distractor component and the second distractor component, wherein the first distractor component and the second distractor component are movable with respect to one another along the longitudinal axis to permit selectively extending one of the distractor components beyond the other distractor component along the longitudinal axis. - View Dependent Claims (18, 19, 20)
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Specification