Qn# (b)(4).The customer returned one hemodialysis connector assembly and product packaging for evaluation.Signs of use in the form of biological material were observed inside both extension lines.Visual inspection of the luer hubs revealed a small crack at the threading of the venous luer hub.The damage appeared consistent with repeated tightening on the luer.The instructions for use (ifu) provided with this kit states, "flush both lumens of catheter with saline and clamp irrigation tube with catheter pinch clamp".The connector assembly was functionally tested by injecting both lumens using a water-filled lab inventory arrow raulerson syringe (ars).No leaking was observed when injecting either extension line.Water did not leak from the damage to the venous luer hub as the cracks likely did not travel completely through the hub.A device history record review was performed, and a potentially relevant finding was identified: for material c-30101-001, a non-conformance was initiated for lot 13p20h0058 in regards to an extension line separated/torn during use.This finding is not relevant to this complaint investigation.The instructions for use (ifu) provided with this kit warns 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.Visual analysis revealed that the venous luer hub was cracked.The appearance of the crack was consistent with over-tightening on the luer hub.A device history record review was performed and one finding was discovered; however, this finding is not relevant to this complaint investigation.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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