Product was not returned for evaluation.This report is based on the information provided by the customer.Multiple attempts were made requesting additional complaint information.Without the return of the device nor additional information regarding the event, the root cause could not be determined.The lot number was provided and there appear to be no anomalies or nonconformances which could have contributed to this event noted in the device history record for this lot.Historical complaint data was reviewed and found no other similar complaints for this part.No other complaints were received in relation to this lot number.The instructions for use were reviewed and appear to be adequate for the use of this product.Therefore, no additional corrective or preventative actions are necessary at present.All complaints are trended and reviewed by management on a monthly cadence.As part of this monthly review, any excursion above the control limits for this failure mode will be assessed, documented, and acted upon as appropriate.Manufacturer reference file # (b)(4).
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