Qn#(b)(4).The customer returned one swg for analysis.The customer also provided two photos for analysis.Visual analysis revealed that the core wire was separated into two parts.The distal j-bend did not appear misshapen.Microscopic examination revealed that the core wire point of separation ends was slightly tapered, indicating undue force contributed to the breakage.The distal and proximal welds appeared to be full and spherical.The separation points of the core wire measured 20mm from the distal tip and 433mm from the proximal tip.The total length of the returned core wire measured to be 453mm which is within the specification limits of 449.2mm-458.8mm per the swg graphic drawing.The guide wire outer diameter measured 0.518mm , which is within the specification limits of 0.508mm-0.533mm per the swg graphic drawing.Functional inspection could not be performed due to the severity of the damage observed.A manual tug test confirmed that both welds were secure and 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 20 mm from the distal weld.No manufacturing defects were found during this investigation.Arrow guide wires of this size are designed and manufactured to withstand a tensile force of 2.0 pounds force when tested in accordance with iso 11070 test configuration.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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