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(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.Visual inspection was performed on the returned device.The unstable stent was unable to be confirmed as the stent was returned dislodged.A review of the lot history record revealed no manufacturing nonconformities that would have contributed to this complaint.Additionally, a review of the complaint history of the reported revealed no other incidents.The investigation was unable to determine a cause for the reported difficulty of the stent being unstable on the balloon.The noted stent damage and dislodgment was the result of inadvertent mishandling during packaging for return.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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