Manufacturing review: a device history record review could not be performed as the lot number is unknown.Investigation summary: the device was not returned for evaluation.The medical records included images.The image review was documented in the medical records.Medical records were provided and reviewed.Approximately six months later post filter deployment, a computed tomography of abdomen and pelvis was performed for evaluation of inferior vena cava filter.The study showed an inferior vena cava filter posteriorly displaced with the filter tip abutted or embedded in the posterior wall of the inferior vena cava and the filter appeared to be meridian type.On the same day, the bard meridian inferior vena cava filter was attempted for removal.The right internal jugular vein was accessed and a 5-french coaxial dilator along with the 6-french long sheath was placed.Then a 6-french straight multi-side hole catheter was advanced through the patient¿s existing inferior vena cava filter.Then a 10-french delivery system was advanced above the level of the inferior vena cava.Multiple attempts at a 20mm gooseneck snare were attempted to remove the patient¿s inferior vena cava filter.Then a reversed curve catheter was reformed in the patient¿s iliac veins and a guidewire was advanced and snared from above the level of the filter but, the meridian inferior vena cava filter could not be removed.An inferior vena cavagram was performed which demonstrated the filter hook to be embedded within the inferior vena cava wall.At this time, it was felt that the risk versus benefit at attempting more aggressive removal techniques were not warranted.As the patient had no contraindication to inferior vena cava filter removal.Finally, the removal attempt was unsuccessful, and it was concluded that the filter hook was embedded within the inferior vena cava wall and the risk for removing this filter was not felt to be warranted at the time.After four years and ten months, previously performed computed tomographic images, were reviewed and the study demonstrated the filter was at the l1-l2 to l3 interspace and it was found that the migration was unlikely based on the imaging study.The study also showed that there was a posterior tilt of 11-degrees demonstrated in the sagittal plane was identified and this showed negative for tilt.Also, a grade 3 perforation was noted with a ventral strut extended 5mm outside the cava wall abutted the duodenum.At the same time, the images during the retrieval attempt were also reviewed and the study showed that the filter was at the l1 to l2-l3 interspace.There was no significant tilt noted and there was probable mild left extravasation indicated.Therefore, the investigation is confirmed for the alleged perforation of the inferior vena cava and retrieval difficulties.However, the investigation is unconfirmed for the alleged filter tilt as medical records states "there was a posterior tilt of 11-degrees demonstrated in the sagittal plane was identified and this showed negative for tilt".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.
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