(b)(4).Investigation - evaluation: a review of the complaint history, device history record, documentation, instructions for use (ifu), specifications, trends, quality control and visual inspection of the returned device was conducted during the investigation.The device is shipped with an instruction for use (ifu) that describes the intended use, specific items are addressed such as: the proper warnings, precautions, and instructions for use.Visual inspection of the returned product confirms circumferential separation approximately 3mm distal of the bond joint.Microscopic examination of the returned product shows no signs of elongation indicative of material degradation.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.We will continue to monitor for similar complaints.
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