Blank fields on this form indicate the information is unknown or unavailable.Investigation - evaluation a review of manufacturing instructions, trends, complaint history, device history record, specifications, quality control data, and visual inspection / functional testing of four unopened devices from the same lot as the device alleged in this report was conducted during the investigation.There is no evidence to suggest the finished product was not made to specifications.Review of the device history record of the finished product shows no nonconforming events that would contribute to this failure mode.There were no other reported complaints for this lot number.The used device was not returned.Four sealed (unused) aurous centimeter vessel sizing catheter (n5.0-35-100-p-10s-pig-csc-20) were returned from lot 6922581(same lot as used device).Twenty-one marker bands were present on each of the devices.A portion of catheter discoloration is noted on device 1.Portion of catheter under label is not discolored.All four catheters were tested for visualization of tip using fluoroscopy.Three separate test were performed on all four devices.First test was a direct image of the device.The second test used a plexiglass model with each of the devices, this mimics in patient use.The third test used aluminum slab model, which also mimics in patient use.All four devices passed all three tests.Based on the information provided and the results of our investigation, a definitive root cause could not be determined.Per the quality engineering risk assessment, no further action is warranted.Monitoring will continue to be performed for similar complaints.
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