(b)(4).Similar to device under 510(k) (b)(4).(b)(4).Summary of investigational findings: long dilator, blue sheath, jugular introducer, and femoral introducer with loaded filter returned.Secondary filter legs/wires are deformed and pulled upwards against filter hook.Also, marks were noted on the tip of the introducer sheath.Both observations confirming, that attempts had been made to reposition the pre-exposed filter as reported.The exact reason for the straightened filter hook cannot be determined, but after retrieval, attempts may have been made to pull the filter from the piston/cup without advancing the introducer.Ifu, warning: the slightly expanded filter can be repositioned proximally or distally, but not pulled back into the sheath; doing so will most likely damage the filter.No evidence to suggest that device was not manufactured according to specifications.Cook medical will continue to monitor for similar events.
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