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During the initial implantation procedure of an optimizer lite ipg, the physician reported the v2 setscrew could not be engaged.Physician made numerous attempts to reengage the setscrew but was unsuccessful.After many attempts to reengage the setscrew, the physician stated that the ipg was defective and requested another ipg.A backup ipg was implanted without incident.The original ipg was decontaminated at an approved decontamination facility before being returned to impulse dynamics usa for evaluation.Damage was observed on one of the v2 setscrews consistent with the reported issue.The hexagonal edges of the setscrew were fully stripped.The remaining five setscrews were successfully tightened to full depth and backed out without any issues.To proceed with electronic controls testing, the damaged setscrew was replaced.The device then passed all functional checks.The reported issue occurred when the v2 setscrew on the ipg could not be engaged during the implant procedure.Based on the evaluation of the returned device, the setscrew was found to be completely stripped, preventing proper engagement with the torque tool.This damage is consistent with repeated attempts to engage the screw after initial misalignment or improper tool insertion.It is likely that the setscrew was damaged during these early attempts, rendering it non-functional for the remainder of the procedure.The root cause of the failure is mechanical damage to the setscrew, likely resulting from repeated unsuccessful engagement attempts, possibly initiated by initial tool misalignment or excessive force.
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