(b)(4) the customer returned one hemodialysis catheter with "cannon ii plus" printed on the juncture hub.The catheter showed evidence of use.Visual inspection with the naked eye and under magnification did not reveal any defects of anomalies.The catheter was leak tested according to chronic hemodialysis catheter module requirements.The venous extension line was pressurized with water to 45psi with the venous tip occluded.As soon as the line was pressurized, water was seen leaking from the arterial tip.When the test was repeated for the arterial extension line, water was seen leaking from the venous tip.The hub connection assembly was then removed from the catheter body and reseated.The compression sleeve and compression cap where then threaded as described in the instructions-for-use (ifu).After reseating the leak test was repeated and no leaks were observed from either lumen.Therefore, it is believed the catheter was returned with the hub connection assembly seated incorrectly.A device history record review was performed on the catheter and no relevant manufacturing issues were identified.The ifu provided with this kit describes the technique for seating the hub connection assembly into the catheter body.It cautions to ensure that the compression sleeve is securely positioned inside the threaded compression cap and to avoid attempts to place compression sleeve onto hub connection assembly cannula and then apply threaded compression cap.The ifu also notes the green compression sleeve must be present when threading compression cap onto hub connection assembly.Failure to do so may result in air embolism, blood loss or catheter separation.The reported complaint of air being allowed into the arterial arm of the catheter was confirmed through functional testing of the returned complaint sample.It was determined through catheter leak testing that there was inter lumen crossover between the arterial and venous arms of the catheter.The catheter hub assembly was removed and then reseated according to the ifu and then retested.No leaking/crossover was observed during functional testing after the hub assembly was reseated.Based on the testing performed, it is believed the catheter was returned with the hub connector assembly incorrectly seated; therefore, it was determined that the probable cause for the complaint issue is operational context.
|