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(b)(4).The customer returned one guide wire, a dilator, and the product lidstock for analysis.The guide wire was advanced through the dilator was unraveled.The components showed evidence of use in the form of dried blood.Visual examination revealed the guide wire was unraveled from the distal weld and is kinked/distorted towards the distal end of the body.The core wire distal j-bend was deformed and exposed out of the coil wire.Microscopic examination of the guide wire confirmed the core wire was broken adjacent to the distal weld.The exposed distal core wire tip was tapered at the point of separation.Both welds were present and appeared full and spherical.Examination of the dilator did not reveal any defects or anomalies.The major kinks in the guide wire body were measured at 40 mm and 72 mm from the distal tip.The broken core wire measured 455 mm in length, which is within the specification limits of 450-458 mm per guide wire product drawing; therefore, no pieces of the core wire appear to be missing.The outer diameter of the guide wire measured 0.838 mm, which is within the specification limits of 0.838-0.877 mm per guide wire product drawing.The dilator length from the distal end of the juncture hub to the distal tip measured 8 2/16" which is within the specification limits of 8 1/32"-8 9/32" per dilator product drawing.The distal tip of the dilator measured 0.036", which is within the specification limits of 0.036"-0.038" per dilator product drawing.Functional inspection of the guide wire could not be performed for this complaint investigation due to the damage to the returned guide wire.Simulated use of the dilator was performed per the instructions-for-use (ifu).A lab inventory 0.035" guide wire (measured 0.846 mm) was threaded through the returned dilator and was able to advance through with little to no resistance.A manual tug test confirmed that the proximal weld was intact.A device history record review was performed, and no relevant findings were identified.The instructions-for-use (ifu) provided with this product warns the user , "do not apply excessive force in placing or removing guidewire, dilator, or access device.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 complaint investigation of the returned sample.The core wire was broken adjacent to the distal weld.The guide wire and dilator 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.This internal specification is higher than the bs en iso 11070:2014 standard of 2.2 pounds force for this size wire.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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