Qn#: (b)(4).The customer returned a guide wire assembly, introducer needle, and product lidstock for evaluation.Definite signs of use were observed on the returned components.Visual analysis revealed that the guide wire was unraveled from the distal weld.The guide wire was additionally kinked.The distal j-bend of the core wire was slightly misshapen.Microscopic examination confirmed that the core wire was broken adjacent to the distal weld.Both welds were present and appeared full and spherical.Visual and microscopic examination revealed no obvious defects or anomalies on the introducer needle.The kink in the guide wire measured 571mm from the proximal end.The overall length of the guide wire core wire measured 603mm which is within the specification limits of 596mm - 604mm per the guide wire product drawing; therefore, no pieces of the core wire appear to be missing.The outer diameter of the guide wire measured 0.803mm which is within the specification limits of 0.788mm - 0.826mm per the guide wire product drawing.The outer diameter of the needle cannula measured 0.04980" which is within the specification limits of 0.0495" - 0.0505" the cannula drawing.The inner diameter of the needle cannula measured 0.041" which is within the specification limits of 0.041" - 0.043" the cannula drawing.The undam aged portion of the guide wire was threaded through the returned introducer needle and was able to pass with little to no resistance.Performed per the instructions for use statement, "advance guidewire into arrow raulerson syringe approximately 10 cm until it pas ses through syringe valves or into introducer needle.".A manual tug test confirmed that the proximal weld was secure and intact.A device history record review was performed, and there were no relevant findings.The ifu provided with this kit informs the user, "warning: do not withdraw guidewire against needle bevel to reduce risk of possible severing or damaging of guidewire.".The report that the guide wire unraveled due to needle resistance was confirmed through examination of the returned sample.The core wire was broken adjacent to the distal weld.The guide wire and needle met all functional and dimensional requirements.No manufacturing defects were found during this investigation.Arrow guide wires of this size are designed and manufactured to withstand a tensile force of 2.75 pounds force.The selected insertion site and patient anatomy may present a tortuous path that could contribute to the possibility of guide wire kinking.Guide wire breakage may occur if a force greater than the design specification is applied during removal.Based on these circumstances, unintentional use error likely caused or contributed to this event.Teleflex will continue to monitor and trend for reports of this nature.
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