It was reported that during the pre-inspection of the handpiece, the stabilizing rubber component that interfaces with the snaplock and worm screw had disassociated from the snaplock.The handpiece was replaced in order to start with the case.The device was not being used with a patient during the event.Results of the investigation have concluded that the snaplock assembly was broken, which makes it a reportable event.
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H10: the navio handpiece (part number 110137 / serial number (b)(6)), intended for use in treatment, had an issue with lead screw nut separating from the snap lock prior to a procedure on (b)(6) 2017.The navio handpiece was returned for further evaluation and the initial visual/functional inspection was performed, which confirmed the reported event.The lead screw nut was broken at the threads indicating an attempt to move the nut independent of the snap lock body (aka drill carrier).This is most likely caused by outside forces (user/scrub tech/cpd personnel) attempting to "move the gears" and mistaking the lead screw nut for the portion they want to exercise.The root cause of this issue was found to be user error.A device history record review found the device met all manufacturing specifications during release for distribution.A complaint history review found similar reports and this issue will continue to be monitored.To prevent a recurrence of the issue, and for proper care/maintenance and usage of the device, refer to the navio surgical system instrument kit guide to cleaning and sterilization and navio surgical system for unicondylar knee replacement and patellofemoral arthoplasty user's manual.
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