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(b)(4) the serial number on the returned sample is (b)(6).Returned for investigation was a 40cc 8.0fr rediguard intra-aortic balloon catheter (iabc) without the original packaging.The sample was returned in a cardboard box and was in a sealed ziploc bag.Returned with the sample was supplied 40cc inflation driveline tubing; no damage or abnormalities were noted to the returned inflation driveline tubing.Upon return, the peel away sheath was noted on the iabc.The one-way valve was tethered to the short driveline tubing.The iabc bladder was fully unwrapped.Multiple kinks to the iabc central lumen were noted at approximately 68.9cm, 70.6cm and 73.7cm from the iabc distal tip.Spots of dried blood were noted on the exterior surfaces of the returned sample.No blood was noted within the helium pathway.No other visual damage or abnormalities were noted to the returned sample.The sample was likely cleaned prior to the return.The bladder thickness was measured at six points with measurements ranging from 0.0072in-0.0079in and was within specification of pro-cess document.The one-way valve was tested and passed.A vacuum was pulled on the one-way valve, and it held for at least 1 minute according to quality system document.The iabc central lumen was aspirated and flushed using a 60cc lab-inventory syringe.No abnormalities or debris were noted.The iabc was connected to an iabp with the returned 40cc inflation driveline tubing.The iabc was inserted into the "t" tube and 75mmhg backpressure was applied.The iabc was pumped for a minimum of 15 minutes.There were no alarms triggered.The bladder inflated and deflated completely with each beat.The iabc was leak tested in accordance with testing methods from manufacturing procedure.No leaks were detected.Full inflation was achieved.The device passed the leak test.A lab inventory 0.025in guidewire was back loaded through the iabc distal tip.Resistance was noted at approximately 68.9cm, 70.7cm and 73.9cm from the iabc distal tip, which are the lo-cations of the previously noted kinks.The guidewire was able to advance through the central lumen.No blood or debris was noted.A device history record (dhr) review was conducted for the lot number with no relevant findings.The device passed all manufacturing specifications prior to release.The reported complaint that the "inflation and pressurization effect was not achieved after catheter inserted" is not confirmed.The returned iabc bladder was fully intact with no abnormalities noted.During the investigation, the iabc fully inflated, and no leaks/alarms were noted.The returned device passed visual and functional test specifications.Based on a review of the device history record (dhr), the product met specification upon release.The root cause of the complaint is undeter-mined.No further action required at this time.
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