It was reported that the procedure was to treat a lesion located in the right coronary artery that was moderately-severely tortuous, 60-70% stenotic and 60% calcified.A xience alpine 2.75x28 was implanted, but the stent balloon only partially deflated after implantation.The system was retrieved as a unit with resistance.There were no reported adverse patient effects and no clinically significant delay in the procedure.No additional information was provided.
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The device was not returned for analysis.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 from this lot.The investigation was unable to determine a conclusive cause for the reported difficulty to remove the protective sheath; however, factors that may contribute to difficulty removing the protective sheath include, but are not limited to, sheath sizing, mishandling during sheath removal of sheath and stent damage.Additionally, the investigation was unable to determine a conclusive cause for the reported deflation issues; however, factors that may contribute to deflation issues include, but are not limited to, contamination in the inflation lumen, patient anatomical morphology, patient disease state, deflation technique, contrast dilution, and inadequate connection to the deflation device.The reported difficulty to remove from anatomy appears to be related to operational context as it is likely the partially deflated balloon met resistance with anatomy and device accessories during removal.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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