(b)(4).The results of the investigation are as follows: review of the most recent repair record determined the unit was found to rpms out of specification on the high end, the control bar was not in the correct position, and the calibration was out at the zero reading.The motor, eccentric shaft, plug harness, switch, vespel, and semi-bearings, and various other parts were replaced and resolved the reported issue.A definitive root cause cannot be determined.The event is confirmed.If any further information is found which would change or alter any conclusions or information, a supplemental will be filed accordingly.Zimmer biomet will continue to monitor for trends.
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It was reported upon inspection during preventative maintenance, the unit was found in need of repair.There were no known issues with this dermatome when it was sent it.During device evaluation, it was discovered that the rpms were out of specification on the high end.There was no patient involvement.No further event information available at the time of this report.
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