H3, h6: the device was used during treatment and was not returned for evaluation of the difficult disengagement of the speed guard.The dhr was reviewed and found that the product met manufacturing specifications prior to being released for distribution.A complaint history review found similar complaints of the reported issue.The failure has been identified in the risk file.The surgical technique guide released at the time of the complaint has recovery procedure guidelines in the case of a navio surgical system failure at any point during the surgical case.A failure can consist of, but is not limited to, a system software crash, unrecoverable hardware failure, handpiece failure with no back up available, tracker array failure or loss of contact with bone that is unrecoverable, etc (p.38).There is no indication that the instructions for use contributed to the reported event.The relationship of the device and the reported event has not been established.A factor that could have contributed to reported event was that the guards were sticking to the handpiece around the drill guide support.After cleaning and disinfecting the handpiece, the reportable was able to attach and detach the guards with no problem.However, without the actual device for evaluation, this is unable to be confirmed.Therefore, the root cause of the reported event could not be determined.
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