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(b)(4).Evaluation summary: the device was returned for analysis.Visual and dimensional inspections were performed on the returned device.The stent damage was confirmed.The failure to advance and difficulty removing the device could not be replicated in a testing environment as it was based on operational circumstances.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history of the reported lot did not indicate a lot specific quality issue.The investigation determined the reported difficulties were likely due to interactions with the anatomy.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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