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A visual and dimensional inspection was performed on the returned device.The reported irregular appearance/texture, difficult to advance, and difficult to remove could not be tested due to the device condition.A review of the lot history record identified no manufacturing nonconformities issued to the reported lot that would have contributed to this event.Additionally, a review of the complaint history of the reported lot did not indicate a lot specific quality issue.The investigation was unable to determine a conclusive cause for the reported difficulties.Factors that may contribute to difficulty advancing and removing the catheter over the guide wire include, but are not limited to, inner diameter of the catheter, outer diameter of the guide wire, device support, user technique, and/or damage to the catheter or guide wire.Factors that may contribute to irregular texture or appearance of the welds include, but are not limited to, manufacturing, material properties, damage to the welds, or exposure to the elements during storage.In this case, return device analysis discovered the guide coils were bunched/misaligned and stretched distally.This type of damage is consistent with guide wire interaction with the patient¿s anatomy during advancement or an accessory device during removal.Additionally, the shaping ribbon was noted to be bent, further indicating a possible interaction with the anatomy or an accessory device.It is possible that interaction between the guide wire and anatomy/accessories contributed to the noted damages and subsequently resulted in the difficulty advancing and removing the catheter; however, this cannot be confirmed.Additionally, irregularities in the distal welds appearance and texture were unable to be tested by return analysis due to the noted coil damage.There is no indication of a product quality issue with respect to manufacture, design, or labeling.
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