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The device was returned for analysis.The reported material rupture was confirmed.The reported difficult/delayed activation could not be confirmed as the stent was not returned for evaluation.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 was unable to determine a conclusive cause for the reported material ruptures; however, factors that may contribute to material ruptures include, but are not limited to, material damage, interactions with other devices or interaction with lesion calcification and tortuosity.The reported difficult/delayed activation appears to be related to operational context of the procedure as it is likely the reported material rupture caused the reported difficult/delayed activation.There is no indication of a product quality issue with respect to manufacture, design or labeling of the device.
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