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Manufacturing review: a manufacturing review was not requested as the lot number reported is unknown.Investigation summary: the device was not returned for evaluation.Medical records were provided and reviewed.Bard simon nitinol filter was deployed in the inferior vena cava, inferior to the renal veins for a patient with pulmonary embolism.An inferior vena cavogram confirmed the appropriate placement of the filter.Approximately, four months and twenty-six days of post-deployment, computed tomography of the chest confirmed no evidence of pulmonary embolism.Around, twenty-two days later, computed tomography of the abdomen was conducted.There was cephalad migration of the apex of the filter which was at or just above the level of the left renal vein.A lateral tilt was noted at 13 degrees, but the apex of the filter did not touch the inferior vena cava wall.Perforation was noted of 2 medial struts of 8 millimeters and 6 millimeters.The top of the strut that perforated by 8 millimeters extended into the lower body of the pancreas.There was a 6-millimeter posterolateral strut perforation.A 2.1-centimeter metallic linear foreign body in the right hepatic lobe was noted, which most likely represented strut migration post-fracture.Therefore, the investigation is confirmed for the perforation of the inferior vena cava (ivc) and filter migration.The definitive root cause could not be determined based upon available information.It is unknown whether patient and/or procedural factors contributed to the event.Labeling review: a review of product labeling documentation (e.G., procedural instructions, indications, warnings, precautions, cautions, possible complications, contraindications, nursing guide, and unit label) did not find any product labeling inadequacy.
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