A guidewire, cook brand 4f catheter, and pieces of a guidewire were returned and evaluated.The proximal end of the guidewire was intact, but the distal end had unraveled.The wire was found in three pieces: one inside the 4f catheter, one in a separate bag (unraveled) and the third section through the filter.This damage could be a result of handling in the user environment or a result of a manufacturing issue (however the manufacturer of the guidewire is unknown).The portion of the wire in the filter, which had unraveled, was free to move within the lumen of the filter.The returned filter appeared correct with a regular shape and no burrs.The delivery system was not returned for evaluation.The guidewire breakage could not be confirmed to be related to the filter or delivery system.
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