The device was not returned for analysis.The product risk assessment identifies this as a foreseeable event; as such, design and manufacturing controls and mitigations have been established for potential causes.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 definitive cause for the difficulties.According to the reported information, it may be possible that the distal shaft was restricted in the anatomy preventing the shaft lumens from moving freely preventing deployment and causing the thumbwheel to have resistance.Ultimately, the stent was deployed successfully with the reported absolute device.There is no indication of a product quality issue with respect to the design, manufacture, or labeling of the device.
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