There is one (1) malfunctioned units/events associated with a fractured collar.A review of the device history record is performed for any reported event with a valid and confirmed lot number.No nonconformances were noted.Therefore, the conclusion of the device records review concluded the product was manufactured to specifications.The complete device was not returned.The evaluation was performed on various pieces of the device.Because the device was returned in pieces, the root cause that contributed to the failure could not be determined.
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