It was reported the length read on the calibration of the depth gauge did not correspond with the length of the measuring tip.There was an estimated difference of around 10 mm.No screw length mistakes were made because of this as it was remarked quickly as this could obviously be seen.The surgeon used another depth gauge from their own to measure the screw length right.It was reported that although the device was in contact with the patient, no patient injury occurred.The event did not lead to an increase of surgery time.
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