The product was not returned to abbott vascular 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 similar incidents reported from this lot.The investigation was unable to determine a conclusive cause for the reported difficulties.It may be possible that the distal sheath was entrapped or restricted within the lesion causing resistance between the shaft lumens and preventing the thumbwheel from rotating and as a result the physician decided to open the device in order to deploy the stent; however, without having the device to examine, this could not be confirmed.There is no indication of a product quality issue with respect to manufacture, design or labeling.
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