(b)(4).The customer returned one connector assembly from a hemodialysis kit for analysis.Signs of use in the form of biological material were observed on the juncture hub.After failing functional testing, a small crack was observed on the arterial luer hub.Visual analysis revealed that the crack was adjacent to the threads.Microscopic examination confirmed the damage and revealed that the cracks are consistent with damage due to repeated over-tightening on the luer hubs.The returned sample was functionally tested in accordance with the instructions for use (ifu).The ifu provided with this kit instructs the user, "establish and maintain catheter patency.Solution and frequency of flushing a venous access catheter should be established in hospital/institutional policy".Water was observed leaking out of the crack on the arterial luer hub.No leaks were observed on the venous luer hub.A manual tug test confirmed both luer hubs were secure to their respective extension lines.A device history record review was performed, and no relevant findings were identified.The ifu provided with the kit informs the user, "repeated over tightening of bloodlines, syringes and caps will reduce connector life and could lead to potential connector failure".The customer report of a cracked luer hub was confirmed by complaint investigation of the returned sample.The arterial (red) luer hub was cracked.The appearance of the crack is consistent with over-tightening on the luer.Based on the customer report and the condition of the sample received, 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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