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Investigation - evaluation: a review of the complaint history, device history record, instructions for use (ifu), specifications and visual inspection of the returned device was conducted during the investigation.The customer returned only the hub of the device for evaluation.Visual examination of the returned piece indicated that the tubing was severed at the hub.A document based investigation evaluation was also performed.There is no evidence to suggest the product was not made to specifications.Review of 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, examination of the returned product and the results of our investigation, a definitive root cause could not be determined.Measures have been initiated to address this failure mode.
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