(b)(4).Evaluation summary: visual, functional and scanning electron microscopy (sem) analysis was performed on the returned device.The reported balloon rupture was confirmed.Sem analysis noted that the balloon failure may be attributed to mechanical damage to the outer surface.It is likely that the balloon rupture occurred due to interaction with the lesion or associated devices.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.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 the design, manufacture, or labeling of the device.
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