VELYS — Injury report filed with FDA (MAUDE). A MAUDE report does not establish that the device caused the outcome. Reported narrative: SURGEON STARTED VELYS RAS ATTUNE PS PRIMARY KNEE AFTER COMPLETION OF ALL INITIALIZATION, CALIBRATION AND DRAPING AS PER THE IFU. NATURAL JOINT ASSESSMENT AND PLANNING WAS THEN COMPLETED AND THE SURGEON CHOSE TO PERFORM A 2 DEGREE VARUS CUT ON THE TIBIA. THE KNEE WAS POSITIONED WITH 'Z' RETRACTORS PLACED MEDIAL AND LATERAL TO PROTECT THE COLLATERAL LIGAMENTS. AFTER FINISHING THE CUT WITH AN OSTEOTOME THE SENSOR TENSOR WAS THEN USED TO CHECK BALANCE WITH THE ACCUBALANCE GRAPH. IT WAS THEN NOTED AN UNEXPECTED INCREASE IN MEDIAL LAXITY RELATIVE TO THE LATERAL COMPARTMENT. AFTER FURTHER ASSESSMENT IT WAS IDENTIFIED THAT THE MCL WAS DAMAGED AND NEED REPAIR WITH FIBREWIRE. THIS WAS COMPLETED AND THE FEMORAL CUTS WERE COMPLETED WITH NAVIGATION. THE REST OF THE CASE PROCEEDED WITHOUT FURTHER DELAY OR INCIDENT. DOE: (B)(6) 2022.