(b)(4).Similar to device under 510(k) k090140.(b)(4).Summary of investigational findings: jugular introducer with filter withdrawn into protection sheath is returned together with blue sheath and long dilator.A 3 cm penetration is found approx.18-21 cm from distal tip of sheath and a minor kink is found approx.18 cm from proximal end.Red locking mechanism is not pushed, but when activated the filter could be moved as intended.The exact reason for the filter to penetrate the sheath cannot be determined.It is reported that sheath passed easily, but it may have been somehow kinked during advancement via left internal jugular vein.Under normal conditions the sheath is strong enough to accomplish the procedure, but the sheath may kink if somehow exposed to excessive force during advancement.If filter is advanced through a kinked sheath, the filter may be prone to exceed the sheath wall.Cook medical will continue to monitor for similar events.
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