Medtronic received information regarding a functional endoscopic sinus surgery (fess).It was reported that the power automatically shut down.After that, the instrument tracker had recognition failure.The electromagnetic (em) blade was recognized.There was a delay of less than one hour and no impact to the patient.Additional information was received.The system was plugged in to a known, functional outlet when it shut down.The recognition failure of the tracker was clarified to mean that the tracker could not be verified and this could not be resolved through troubleshooting.It was noted that this was an issue with the system and not the tracker although the exact cause of the recognition failure was unknown.The cause of the system shutting down was not known.
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