(b)(4).The customer returned one guide wire and one catheter for analysis.Signs of use were observed on the returned components.The guide wire was unraveled.Visual examination revealed the guide wire was unraveled from the proximal weld and was kinked in several locations along the body.The distal j-bend was misshapen but intact.Microscopic examination of the guide wire confirmed the core wire was broken adjacent to the proximal weld.The exposed proximal core wire tip is tapered and discolored at the point of separation.Both welds were present and appeared full and spherical.The major kinks in the guide wire measured 25mm and 380mm from the distal end.The broken core wire length measured 682mm which is within the specifications of 678-688mm per product drawing.Therefore, no pieces of the core wire appear to be missing.The guide wire outer diameter measured 0.85mm, which is within the specifications of 0.838-0.877mm per product drawing.Functional inspection of the guide wire was performed per the instructions for use (ifu) provided with the kit which states, "advance guidewire into arrow raulerson syringe approximately 10 cm until it passes through syringe valves or into introducer needle." the undamaged portions of the guide wire were threaded through a lab inventory ars and 18 ga introducer needle with no resistance.A manual tug test confirmed the distal weld was intact.A device history record review was performed, and no relevant findings were identified.The instructions for use (ifu) provided with this kit warns the user , "do not apply excessive force in placing or removing catheter or guidewire.Excessive force can cause component damage or breakage.If damage is suspected or withdrawal cannot be easily accomplished , radiographic visualization should be obtained and further consultation requested." the report that the guide wire unraveled was confirmed through examination of the returned sample.The core wire was broken adjacent to the proximal weld.The guide wire met all functional/dimensional requirements during investigation testing.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 caused or contributed to this event.Teleflex will continue to monitor and trend for reports of this nature.
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