Visual inspection of the returned device confirms the complaint.Approximately 0.02cm of the core wire is sticking out from the coiled section at the "j" portion.The device was forwarded to the contract manufacturer for further evaluation.The contract manufacturer conducted an evaluation of the returned device.A magnification evaluation showed the guidewire welds are intact.However, the fracture occurred on the core straight section ~ 2.5 cm from the distal tip.It was noted that both sides of the core were slightly bent, which could indicate that some force was applied to this point leading to the fracture.No other damage was present on the returned guidewire.When viewed under an electron microscope it was confirmed that the field fracture was not a typical fracture.One of most probable root causes is that an excessive external force was applied to the wire and repeated several times, which could exceed the limits of this high strength material.A review of the manufacture records for the device showed it was manufactured according to specification with no non-conformances or abnormalities.A root cause cannot be determined but is not likely to be manufacture related.
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