Manufacturers ref#: (b)(4).Summary of investigational findings: the investigation is based on the event description and an evaluation of the returned product.It was reported that the filter stuck inside the sheath, why the sheath and the filter were removed and replaced without any harm to the patient.The proximal 11cm of the sheath was returned with the valve still attached and with the filter sticking inside.A kink was noted in the sheath approx.2cm from the hub and since the filter could not pass the kink, the hub was opened and the filter was removed from the sheath.After opening the hub the cup of the femoral introducer with the primary filter legs loaded inside was found placed inside the valve, but could easily be advanced and therefore, it is suggested that the kink in the sheath caused the reported difficulties in advancing the filter.Under normal conditions the sheath is strong enough to accomplish the procedure, but it may kink if advanced through tortuous anatomy and according to the instructions for use excessive force should not be used to place the filter.There are adequate controls in place to ensure the device was manufactured to specifications.It was assessed that because no non-conformances were detected, there is evidence that the dhr was fully executed.In addition, no other lot related complaints have been received from the field.It is therefore concluded that there is no evidence that nonconforming product exists in house or in field.Cook medical will continue to monitor for similar events.This report is required by the fda under 21 cfr part 803.This report is based on unconfirmed information submitted by others.Neither the submission of this report nor any statement made in it is intended to be an admission that any cook device is defective or malfunctioned; that a death or serious injury occurred; or that any cook device caused or contributed to; or is likely to cause or contribute to a death or serious injury if a malfunction occurred.
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