Qn#(b)(4).The customer returned one spring wire guide (swg) and lidstock for evaluation.Visual inspection of the swg revealed the swg was unraveled and had multiple bends in its body.Microscopic examination of the swg confirmed that the distal weld separated from the core wire but was still attached to the coil wire.No defects were observed with the proximal weld.The kinks in the guide wire measured 25mm, 240mm, 330mm, 370mm, 458mm, and 520mm from the proximal weld.The guide wire total length measured 680mm, which is within the specification limits of 678mm-688mm per the guide wire graphic.The guide wire outer diameter measured.845mm, which is within the specification limits of.838mm-.877mm per the guide wire graphic.Functional inspection was performed to recreate the product's intended use.The ifu provided with this kit states: "advance spring-wire guide into the syringe approximately 10 cm until it passes through syringe valves".The guide wire was inserted through a lab inventory ars and introducer needle.Resistance was observed at the damaged portions of the guidewire.A manual tug test confirmed the proximal weld was fully intact.A device history record review was performed, and no relevant findings were identified.The ifu provided with the kit informs the user "warning: do not apply excessive force in removing guide wire or catheters.If withdrawal cannot be easily accomplished, a chest x-ray should be obtained and further consultation requested." the report that the guide wire was unraveled was confirmed through examination of the returned sample.Dimensional inspection and a device history record review did not reveal any evidence of a manufacturing related issue.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 (b)(4) 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 caused or contributed to this event.Teleflex will continue to monitor and trend for reports of this nature.
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