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Investigation ¿ evaluation: a review of the complaint history, device history record, quality control, specifications, and a visual inspection of the returned device were conducted during the investigation.One open package was received; the stent and positioner were only returned.The tether was not returned with the stent.Stent was split on the proximal coil starting at last sideport, the split extended through the end of the coil.Additionally, 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 showed no nonconforming events which could contribute to this failure mode.It should be noted there were no other reported complaints for this lot number that is associated with the defect described in this complaint.Based on the information provided, the examination of the returned product, and the results of our investigation, the root cause of this event is product use or handling related as the event occurred when the operator was removing the tether during the prepping process prior to insertion into the patient.The quality engineering risk assessment for this failure mode was reviewed and it was determined that no additional risk mitigating activity is required at this time.The appropriate personnel will be notified and we will continue to monitor for similar complaints.
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