There was no patient involvement.Unknown when device broke.Device is an instrument and is not implanted/explanted.Part: 319.006; synthes lot: 9848895; supplier lot: na; release to warehouse date: july 14, 2015; manufactured by synthes (b)(4).The raw material was confirmed to be correct per the specification with no (relevant) non-conformance noted.No nonconformance reports (ncr's) were generated during production.Review of the device history record(s) showed that there were no issues during the manufacture of this product, and any sub-components, which would contribute to this complaint condition.Customer quality investigation: investigation flow: broken.Visual inspection: visual inspection performed at customer quality (cq) observed broken needle on the returned depth gauge.The broken needle portion was not returned.No new issues were identified on the returned portions of the device.The received condition of the device agrees with the reported condition and this complaint is confirmed.Document/specification review: below design drawing from date of manufacture to current was reviewed during this investigation and no issues were identified.Depth gauge top level drawing.Needle drawing.Dimensional inspection on the relevant portions were not performed as the broken portions were not returned.The device history record reviewed showed that there were no issues during the manufacture of this product, and any sub-components, which would contribute to this complaint condition.Material review performed, showed no issues with material that would have contributed to complaint condition.Conclusion: no root cause could be determined with the available information.However, it is possible that any unintended forces encountered by the device which is consistent with repeated usage for over 3 years could have contributed to complaint condition.This complaint is confirmed, however, no unidentified product design issues or manufacturing discrepancies that would contribute to the reported complaint condition were identified during this investigation.Therefore, based on the investigation findings, it has been determined that no corrective and/or preventative action is proposed.Device was used for treatment, not diagnosis.If information is obtained that was not available for the initial medwatch, a follow-up medwatch will be filed as appropriate.
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