Knee Alignment Device

Sold as a pair of devices, the Knee Alignment Device (KAD) is used during static motion capture trials to define the the knee flexion/extension axis of the subjects knee prior to a series of walking trials. This eliminates a varus/valgus error that may result from minor marker placement errors of the thigh and shank markers during gait testing. In addition, the use of the KAD based knee model enables the subject marker set to eliminate the use of medial knee markers, which are prone to being knocked off during testing when the subject knees cross or pass closely during swing. This is primarily a problem during gait trials. Two KAD sizes are available - the standard Adult KAD and a much smaller Kiddy-KAD designed to be a fully functional KAD with small children. The KAD is a spring-loaded metal jig that fits gently over the subjects knee while a static calibration data collection is performed. The design of the KAD is such that the absolute distance between all three of the markers on t