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The device was not returned for analysis.Production record and corrective and preventative actions (capa) reviews were performed and revealed no indication of a product quality issue.Additionally, a query of the complaint handling database for the reported lot revealed there are no other similar complaints in this lot.As there was no damage noted to the device during the inspection prior to use, it is possible that interaction with the anatomy and/or inadvertent mishandling contributed to a build-up of tension within the shaft lumens of the delivery system; thus resulting in a spring like release of the stent resulting in the reported stent migration; however, this could not be confirmed.The investigation determined a conclusive cause for the reported difficulties cannot be determined.Based on the reported information and results of the complaint investigation there is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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