Manufacturing review: the device history records have been reviewed and this lot met all release criteria.There was nothing found to indicate there was a manufacturing related cause for this event.Investigation summary: the device was not returned for evaluation.Medical records were provided and reviewed.After sometimes post deployment, computed tomography of abdomen without contrast was performed which revealed an infra renal inferior vena cava filter without significant tilt.The apex of the filter was not touching the inferior vena cava wall.The inferior vena cava filter was however malpositioned as the tip of the filter was located 5 cm below the lowest renal vein.No perforation beyond the inferior vena cava wall was seen.The struts do not appear fractured or bent.There was mild focal narrowing of the inferior vena cava along the inferior aspect of the filter as the inferior vena cava measures 1.2 cm greatest diameter at that point and 1.5 cm proximal to the point of narrowing.Therefore, the investigation is confirmed for the alleged filter migration.The definitive root cause could not be determined based upon available information.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.(expiry date: 01/2017).Device not returned.
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It was reported through the litigation process that a vena cava filter was placed in a patient for unknown reason.At some time, post filter deployment, it was alleged that the filter had migrated.The device has not been removed and there were no reported attempts made to retrieve the filter.The current status of the patient is unknown.
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