(b)(4).During processing of this complaint, attempts were made to obtain complete event, patient and device information.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 similar incidents from this lot.The investigation determined the reported physical resistance appears to be related to circumstances of the procedure as it is likely the stent delivery system interacted with the difficult anatomy during advancement causing the reported physical resistance.Additionally, the investigation was unable to determine a conclusive cause for the reported inflation issues.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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