(b)(4).The cine of the event was received and reviewed by an abbott clinical specialist who concluded the following: the reported inability to fully deflate the balloon of the stent delivery system cannot be confirmed via these images.The inflated balloon is not shown post removal from the proximal stent in the left anterior descending coronary artery (lad), left main, or the right femoral artery.The stent that is deployed in the proximal lad has a good appearance and does not exhibit signs of damage that can be detected through the images provided.The device was returned for analysis.The deflation issue and difficulty removing the stent delivery system (sds) were unable to be confirmed however the wrinkled balloon was able to be confirmed.Based on a visual, dimensional, and functional inspection of the returned device, there is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.The investigation was unable to determine a conclusive cause for the reported deflation issue however the difficulty removing the sds and wrinkled balloon appear to be related to circumstances of the procedure.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 reported from this lot.Based on the information reviewed, there is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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