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Investigation ¿ evaluation: a review of the complaints history, device history records, documentation, drawing, manufacturing instructions, instructions for use, and quality control data were conducted during the investigation.The complaint device was not returned; therefore, no physical examinations could be performed.However, a document based investigation evaluation was performed.There is no evidence to suggest the product was not made to specifications.A review of the device history record shows no nonconforming events which could contribute to this failure mode.It should be noted there were no other reported complaints for this lot number.Based on the information provided, the results of our investigation, a definitive root cause could not be determined.We will continue to monitor for similar complaints and will notify appropriate personnel.Per the quality engineering risk assessment no further action is required.
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