Historically, surgeons have applied subjective feel and judgment when determining whether or not the knee is balance during TKA. The traditional techniques used by surgeons to determine the state of balance of the knee during surgery did not make use of quantified load data, nor did they have the ability to judge balance dynamically throughout the range of motion, including mid-flexion.

When using the VERASENSE sensor device in TKA, the surgeon performs the surgery in their usual way – the use of the sensor technology does not change the surgeon’s workflow in the operating room. Once the surgeon has employed his or her usual techniques and feels the knee is balanced, the operating room staff activates the sensor using the magnet on the LinkStation MINI. The surgeon then places VERASENSE into the tibial tray and examines the mediolateral loading values and contact point rotation* at 10°, 45° and 90° of flexion. Based on this real-time data, the surgeon makes adjustments to arrive at a better balanced knee. The current definition of balance, as applied to various knee designs, is a load differential between the medial and lateral compartments of ≤ 15 lbf through the range of motion.^23,24,26

* for reference only