The device was returned for analysis.The reported resistance/sticking of the thumbwheel was able to be confirmed.The reported difficult or delayed activation and the reported stretched stent was unable to be replicated in a testing environment due to the condition of the returned device (stent previously deployed and 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 did not indicate a lot specific quality issue.As there was no damage noted to the device during the inspection prior to use, the investigation determined the reported difficulties appear to be related to circumstances of the procedure as it is likely that during advancement interactions with the totally occluded anatomy and/or inadvertent mishandling resulted in the noted device damages (kinked inner member, multiple distal sheath kinks/chatter marks) thus preventing the shaft lumens from moving freely, resulting in the reported resistance with the thumbwheel and the reported difficulty deploying the stent.The reported difficulties deploying the stent likely resulted in the reported stretched stent.There is no indication of a product quality issue with respect to manufacture, design or labeling.A cine was received and reviewed by an abbott vascular clinical specialist.In summary, the media attached to this complaint does reflect multiple stents placed in the popliteal and superficial femoral artery (sfa).It is unknown the type of balloons used in this procedure pre and post stent deployment, the size, the inflation pressure, inflation times, and inflation frequency due to the information provided in this report.We do not know if the stent delivery systems were prepped and handled per the instructions for use.The media does reflect a stent in the popliteal and part of the distal superficial femoral artery (sfa) is deployed first.Afterwards another stent is deployed overlapping this stent in the distal sfa only, where it looks like this stent is elongated.Furthermore, two more stents are placed in the mid sfa and proximal sfa all overlapping the edge of each previous stent without issue.With the information provided per report and media, i cannot conclude a probable cause.
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