Manufacturing review: the device history records have been reviewed with special attention to the (b)(4) materials, subassemblies, manufacturing process, and quality control testing.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.Approximately six years four months post filter deployment, computerized tomography revealed inferior vena cava filter that had fractured with 2 struts had migrated.Patient was subsequently taken to the operating room and emergently had the strut removed from the heart.A second strut was seen that had embolized into the pulmonary artery.Approximately three days later, fractured inferior vena cava filter with embolization to right ventricle and lungs resulting in pericardial effusion and retroperitoneal bleed.On the computerized tomography patient was noted to have embolized filter legs in the pericardial sac and in the rul pulmonary artery in conjunction with a juxta renal filter that appeared to be missing 2 legs.Cardiac surgery believed the filter leg penetrated the ventricular wall causing tamponade.Bent linear metallic foreign body within the ventral pericardial sac concerning for a fractured strut from the patient's inferior vena cava filter that has embolized and penetrated through the cardiac wall.Portable supine view of abdomen showed inferior vena cava filter overlies the upper lumbar spine.Approximately two days later, complex filter retrieval was scheduled.Filter tilted, but not tip embedded inferior vena cava filter with otherwise normal inferior vena cava, no clot in filter.Initial attempts at removing the filter with a snare were unsuccessful, as the filter hook could not be completely engaged by the snare.The snare was removed, and the retrieval sheath was upsized to a 16 f sheath.The filter hook was then engaged with endobronchial forceps in the jaws of life technique.It was removed successfully.Right pulmonary arteriogram demonstrated fractured inferior vena cava filter strut in an inferior right upper lobe segmental pulmonary artery branch.Therefore, the investigation is confirmed for filter tilt, filter limb detachment and retrieval difficulties.Per medical records, attempts were made to engage the filter using snare but were unsuccessful due to filter tilt.This could have contributed to the retrieval difficulties.However, the definitive root cause is unknown.Labeling review: a review of product labeling documents (e.G.Procedural instructions, indications, warnings, precautions, cautions, possible complications, contraindications, and unit label) showed that the product labeling is adequate.Expiry date: 01/2013, (b)(4).
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It was reported through the litigation process that a vena cava filter was placed in a patient after being diagnosed with deep vein thrombosis.At some time post filter deployment, it was alleged that the filter tilted, struts detached and patient reportedly diagnosed with cardiac tamponade, cardiac perforation, pericardial effusion, retroperitoneal bleeding and embolized strut retained in the pulmonary artery.The device was removed after an attempted but unsuccessful percutaneous removal procedure.The current status of the patient is unknown.
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