(b)(4) the customer returned one 7fr ptd catheter for evaluation.Visual examination revealed the black pebax tip was partially separated and not returned.The orange inner lumen was also severely twisted protruding from the tip.R & d was contacted about this failure mode and stated that due to the damage observed with the orange lumen, a guidewire was likely not used during the procedure, which allowed the lumen to twist tightly.Once the tip broke, it allowed the orange lumen to twist up as seen with the returned sample.The remaining pebax tip measured to be 0.08" in length, which indicates that at least 0.51" was separated and not returned per product drawing.The ptd basket was able to advance and retract within the ptd sheath with significant resistance encountered at the twisted orange inner lumen.The ptd catheter was connected to a lab inventory rotator.When the button was depressed, the catheter rotated as expected.A device history record review was performed with no relevant findings.The ifu provided with this kit cautions the user, "during native fistula de-clotting, it is strongly recommended that an appropriate guidewire should be used with the otw device.Excessive vessel tortuosity (i.E., tight stenosis alternate with broader segments of vessel or sharp angle of anastomosis) may significantly complicate the thrombectomy procedure.Due to tortuosity, if a guidewire cannot be advanced in the vessel or guidewire cannot cross the clot, then an alternative thrombectomy device or procedure should be explored." the customer report of a separated ptd tip was confirmed by complaint investigation of the returned sample.The pebax tip was separated and the orange inner lumen was severely twisted.R & d was consulted and indicated that a guidewire was likely not used during the procedure, which allowed the damage to occur to the orange lumen.A device history record review was performed with no relevant findings.Based on the customer report and the condition of the returned sample, unintentional use error caused or contributed to this event.Teleflex will continue to monitor and trend for complaints of this nature.
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