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(b)(4).Device evaluation: the device related to the reported event of rupture, was received on aug 30, 2021 with lot number 2991146.Visual analysis of the returned device identified: overweight, a curved opening on radius, wear abrasion, and flat creases.A microscopic analysis was performed which identified: a sharp opening with wear abrasion near of the opening site, this condition was called surgical impact.A dimension measurement in the shell was performed which identify the thickness within specification.Based on the device analysis the final assessment is: a sharp opening on radius assessed as surgical impact.A review of the device history record has been completed.No deviations or non-conformances noted.Further information from the reporter regarding event, product, or patient details has been requested.No additional information is available at this time.Reason for reoperation: rupture.
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