The device was not returned for analysis.An exception review was performed and revealed no indication of a product quality issue.Additionally, an electronic lot history record (lhr) review and review of the complaint handling database could not be conducted because the part and lot number were not provided it is possible that during deployment, prior to unlocking the deployment lock, the delivery system was inadvertently pulled back slightly resulting in full deployment of the stent; 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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