(b)(4).This case was reviewed and investigated according to volcano policy.Visual inspection was performed on the returned device.During the pre-decontamination inspection, it was observed there was an overall curvature to the delivery system.There was a kink in the inner shaft at 147mm from the distal tip as well as bunching at this location.There was also blood present on the outside of the inner shaft.All hub components were present.The adhesive between the luer knob and the handle body was broken and the luer knob was able to freely rotate.The delivery system was functional and the outer shaft was able to be retracted.The filter was no longer in the delivery system.Both the cw and ccw wireforms of the filter were intact.The caudal retrieval tail was slightly bent in the clockwise direction.No damage to the ptfe tubing was observed.All anchors were also present and no deformities were observed.All crimps, both plasma balls, and both marker bands were present and intact.The filter web was also intact.Efforts to gain additional information on the procedure were unsuccessful.The customer reported the filter would not deploy.Device analysis of the returned device found the filter was deployed upon receipt.Volcano found no evidence of malfunction or that the filter would have difficulty deploying.There was a slight bend to the caudal retrieval tail, but his was not significant enough to have any impact on deployment.The kink in the inner shaft could cause a filter to become stuck; however, from what was reported it appears the kink was caused during removal.As the filter was deployed upon receipt, we were unable to conclusively determine whether the filter was difficult to deploy or if it was a user issue.The manufacturing documentation for this device was reviewed and the device met all quality and manufacturing release criteria.To date, no other complaints were reported for this same failure mode within this lot.We will continue to monitor these types of complaints.
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