Device and method for determining force of a knee joint

摘要

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.

主权项

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.