(b)(6) the report that the guide wire unraveled was confirmed through examination of the returned sample.The customer returned a guide wire a 21ga introducer needle for evaluation.There were no obvious signs-of-use observed on the returned components.Visual examination revealed the guide wire was unraveled from the distal weld and was bent in multiple locations along the body.The bill of materials showed that the guide wire included in this kit was supposed to be straight.The returned introducer needle did not show obvious defects or anomalies.The separation point of the core wire was towards the distal end of the guide 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 and discoloured at the point of separation.Both welds were present and appeared full and spherical.The bends in the guide wire measured approximately 19mm and 31mm from the proximal tip.The broken core wire measured 35.2cm which was within the specification limits of 34.4cm-35.6cm per the guide wire product drawing; therefore, no pieces of the core wire appeared to be missing.The bends and the b roken core wire length were measured via calibrated ruler.The outer diameter (od) of the guide wire measured 0.020" which was within the specification limits of 0.020"-0.021" per the guide wire product drawing.The outer diameter (od) of the needle cannula measured 0.0321", which was within the specification limits of 0.0320"-0.0325" per the needle cannula product drawing.The outer diameter of the guidewire and needle cannula were measured via calibrated micrometer.The inner diameter (id) of the needle cannula measured 0.023" via calibrated pin gauge which was within the specification limits of 0.0225"-0.0240" per the needle cannula product drawing.The guide wire was functionally tested per the instructions for use (ifu) provided with this kit, which states "insert desired tip of spring-wire guide through introducer needle or catheter into vein.The spring-wire guide should then be advanced in the routine fashion to the desired depth." the undamaged proximal end of the guide wire was advanced through the returned 21ga introduce.The undamaged portions of the guide wire passed through the needle cannula with little to no difficulty.A manual tug test confirmed that the proximal weld was secure and intact.The instructions-for-use (ifu) provided with the kit warns the user, "warning: although the incidence of spring wire guide failure is extremely low, practitioner should be aware of the potential for breakage if undue force is applied to the wire." in addition, "do not withdraw spring-wire guide against needle bevel to minimize the risk of possible severing or damaging of spring-wire guide." a device history record review was performed, and there were no relevant findings.Arrow guide wires of this size were designed and manufactured to withstand a tensile force of 2.0 pounds force.The selected insertion site and patient anatomy might present a tortuous path that could contribute to the possibility of guide wire kinking.Guide wire breakage might occur if a force greater than the design specification was 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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