(b)(4).Internal file number - (b)(4): during processing of this complaint, attempts were made to obtain complete event, patient and device information.Evaluation summary: the device was returned for analysis.The reported stent dislodgment was able to be confirmed.The reported physical resistance was unable to be replicated in a testing environment as it was based on operational circumstances.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.As there were crimped marks were visible on the balloon and in between markers suggesting the stent was originally positioned correctly and securely at the time of manufacture, the investigation determined the reported difficulties appear to be related to circumstances of the procedure.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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It was reported that the procedure was to treat a mildly tortuous and mildly calcified proximal right coronary artery.A 3.5 x 33 mm xience alpine stent was used.However, it met initial resistance with the anatomy and the stent dislodged from the balloon in the lesion.Therefore, another unspecified stent was implanted to crush and embed the alpine stent in the lesion.There was no adverse patient sequela reported.No additional information was provided.
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