The device was returned for analysis.The reported missing component was confirmed as a stent dislodgement.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 similar incidents from this lot.The investigation determined the reported difficulties appear to be related to circumstances of the procedure.It is likely the stent dislodgement identified during return evaluation is due to inadvertent mishandling during sheath removal.There is no indication of a product quality issue with respect to manufacture, design or labeling.Na.
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It was reported that during preparation of a 3.50x33mm xience sierra, the hoop coil was removed as was the protective sheath.After removal, it was noted that the stent implant was not on the balloon, however, crimp marks were visible.No resistance reported during removal of the hoop or protective sheath.The stent implant was never found.The device was not used and another sierra was used to successfully complete the procedure.There were no adverse patient effects and no clinically significant delay in the procedure.No additional information was provided.
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