(b)(4).Associated mdr#s 3006425876-2023-00768 and 3006425876-2023-00767.The customer report of a blocked catheter was confirmed through investigation of the returned sample.The customer returned one 2-l hemodialysis catheter and product lidstock for analysis.Signs-of-use in the form of biological material were observed inside the catheter extension lines.Initial visual analysis did not reveal any relevant defects or anomalies.After performing functional testing, large quantities of congealed biological material were observed the catheter.The catheter body length from the juncture hub to the distal tip measured 215mm which is within the specification limits of 207mm - 227mm per the catheter manufacturing product drawing.The catheter body outer diameter measured 4.05mm, which is within the specification limits of 3.96mm - 4.06mm per the catheter extrusion manufacturing product drawing.The catheter was functionally tested per the ifu, which states " check lumen patency by attaching a syringe to each extension line and aspirate until free flow of venous blood is observed." a lab inventory arrow raulerson syringe (ars) filled with water was attached to both extension lines and flushed.Both extension lines were flushed, and minor resistance was experienced, but the lines were able to flush as intended.Large amounts of congealed biomaterial were observed when flushing both extension lines, which likely contributed to the blockage experienced by the customer.The ifu provided with this kit informs the user, "check lumen patency by attaching a syringe to each extension line and aspirate until free flow of venous blood is observed." the ifu also instructs the user "maintain catheter patency according to institutional policies, procedures and practice guidelines.All personnel who care for patients with central venous catheters must be knowledgeable about effective management to prolong catheter's dwell time and prevent injury." the catheter passed all relevant dimensional and functional requirements.A device history record review was performed, and no relev ant findings were identified.Based on the customer report and the sample received, unintentional use error likely caused or contributed to this event.Teleflex will continue to monitor and trend on reports of this nature.
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