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(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.Evaluation summary: the device was returned for analysis.The reported missing component (stent) was confirmed as the stent was not returned; however, there were crimp marks on the balloon between the markers, suggesting the stent was originally positioned correctly and securely at the time of manufacture.The reported missing component (protective sheath) was not returned.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 identified no other incidents.Based on the information reviewed, there is no indication of a product quality issue with respect to manufacture, design or labeling of the device.The investigation determined the reported difficulties appear to be related to operational context.
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