(b)(4).Similar to device under 510(k) k090140.(b)(4).Summary of investigational findings: investigation is based on description of event and returned product.No imaging was provided.One complete set (except filter) was returned together with one extra femoral introducer system.Both femoral introducers were used; one of them with no damages and the other severely curved.The pistons could not be moved when pushing the release buttons, why introducers were cut and after placed in water the adherence was dissolved and the pistons moved freely.Investigation revealed no failure/damage to them.At distal tip of sheath ~11 cm were partly squeezed and the tip was flat/oval-shaped - the reason for these damages cannot be determined.The filter was not returned and no imaging was provided, why the exact reason for the un-expanded primary filter legs cannot be determined, but the filter may have been somehow obstructed from fully expanding, either due to a clot turning into fibrin formation or due to other biochemical mechanism during the procedure.The spring effect of all filters is verified by advancing the filter through a sheath before measuring the distances between the filter legs.No evidence to suggest that this device was not manufactured according to specifications.Cook medical will continue to monitor for similar events.
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