Patent ID: 8597210
Filing Date: 2013-12-03
Classification: A61B,G16H

Abstract:
1. A system comprising: a sensor module comprising a (i) tibial paddle configured to be inserted between a patient's tibia and femur; (ii) a rigid handle secured to and extending from the tibial paddle along a common plane at an angle acute to an anterior-posterior midline of the tibial paddle such that the tibial paddle is positionable in a patient's knee joint with the rigid handle without eversion or subluxation of the patient's patella, (iii) a sensor array positioned in the tibial paddle and comprising a plurality of pressure sensors configured to generate sensor signals indicative of the joint force of a patient's knee joint, and (iv) a circuit positioned in the handle and configured to receive the sensor signals from the sensor array and to transmit joint force data based on the sensor signals; a computer assisted orthopaedic surgery system comprising a display and a receiver circuit configured to receive the joint force data from the sensor module, the computer assisted orthopaedic surgery system configured to: determine position data indicative of a position of the patient's femur and a patient's tibia; display an image of the patient's femur and the patient's tibia based on the position data; determine a medial force value indicative of a medial component of the joint force based on the joint force data received from the sensor module; determine a lateral force value indicative of a lateral component of the joint force based on the joint force data received from the sensor module; determine a total force value as a sum of the medial force value and the lateral force value; determine a medial percentage value as a function of the medial force value and the total force value; determine a lateral percentage value as a function of the lateral force value and the total force value; and display (i) the medial percentage value, (ii) the lateral percentage value, and (iii) an icon indicative of the relative medial-lateral balance of the joint force based the medial percentage value and the lateral percentage value.