The reported complaint of the catheter being difficult to retract through the concomitant device could not be confirmed.The partial 30 cm portion of the triox catheter, which appears to have been cut, was visually examined and no surface anomalies, stretch marks or indentations were observed across the catheter.The investigation found no evidence the partially returned device components, features and or functions caused or contributed to the event.The catheter was measured length wise and there was no indication that it was stretched during use.The outer diameter of both the balloon and the catheter were measured and both meet product specifications.The remaining 80 cm of catheter, the hub and the proximal tubing connectors were not returned for investigation.The returned cordis device was also examined and no visually anomalies were observed that could have prevented extracting the catheter.The 30 cm portion of the catheter was pushed into the introducer and was able to be retracted without difficulty.The reported complaint could not be replicated with the indentured partial catheter and introducer.Additionally, the event describes what appears to be a ¿knotting¿ condition which is a known inherent risk associated with this procedure.Knotting can occur with any flow-directed pulmonary artery catheter.The directions for use (dfu) addresses this condition and provides instructions, recommendations and clinical references that would address this occurrence.
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