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(b)(4).The device was returned for analysis.The reported dislodged stent was able to be confirmed.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 similar incidents from this lot.Based on the information reviewed, there is no indication of a product quality issue with respect to manufacture, design or labeling.The xience alpine instructions for use (ifu) states to remove the product mandrel and protective stent sheath prior to removing air from the system.The investigation determined the reported difficulties appear to be related to circumstances of the procedure as the violation of the ifu of not removing the protective sheath and mandrel prior to preparing the device in conjunction with inadvertent mishandling during sheath removal resulted in the reported dislodged stent.
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