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(b)(4).The device was not returned for analysis.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 lot revealed no other incidents.It should be noted that the omnilink elite instruction for use instructs: pre-dilate the lesion with an appropriate size balloon dilatation catheter to closely match the lumen diameter proximal and distal to the lesion.Additionally, it states: should unusual resistance be felt at any time during either lesion access or removal of the delivery system post-stent implantation, the entire system should be removed as a single unit.Failure to follow these steps and / or applying excessive force to the delivery system can potentially result in loss or damage to the stent and / or delivery system components.The investigation determined that the reported difficulties are related to circumstances of the procedure and use technique.The failure to cross was the result of interaction with the chronic total occlusion due to direct stenting.During the failed attempt to advance against resistance, the stent dislodged within the lesion.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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