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.Bard denali filter was implanted just below the renal vein.On the next day, a portable chest x-ray revealed the inferior vena cava filter was noted in the right atrium previously pointed cranially and to the right was rotated clockwise approximately 100-degrees.The apex of the inferior vena cava filter protruded into the tricuspid valve region with the legs projected within the right atrium and attempt was made to dislodged inferior vena cava filter from the right atrium and tricuspid valve.Using the seldinger technique left subclavian trauma line was placed and the right subclavian indwelling central line was removed as it freely migrated in and out of the tissues.A standard median sternotomy was performed.The inspection of the heart revealed that the filter was easily palpable within the right atrium.In addition, at the inferior vena cava region, there appeared to be a near perforation of the cava at that level.Cardiopulmonary bypass was then instituted after heparinization was adequate and the aorta was cross clamped.A right atriotomy was performed and the filter was easily visualized, grasped with forceps, dislodged from its hooks, and dislodged from the surrounding tissues.The retrieval hook had been entangled in the tricuspid valve and this was gently removed, preserved the valve, which was competent after removal of the filter.The right atriotomy was then closed in a 2-layer fashion.Approximately one week five days later, an angel catheter inferior cava filter was placed at l1-l2 disc interspace.Subsequently, twelve days later, angel catheter inferior vena cava filter and right femoral central venous catheter were removed as a unit.Therefore, the investigation is confirmed for filter tilt, filter migration, and perforation of the inferior vena cava (ivc).Based on the available information, 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: 09/2018).
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