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.Medical records were provided and reviewed.Post filter deployment, a computed tomography abdomen and pelvis showed an indwelling inferior vena cava filter.The distal legs of the filter were contracted together and the inferior vena cava appeared to be scarred down around it.This looked like a type filter.The inferior vena cava above the filter was partially flattened, but looked patent.Two years and three months later, the patient presented with abdominal pain.On the same day, a computed tomography abdomen and pelvis showed that an inferior vena cava filter was present, with the surrounding vasculature partially collapsed; however, unchanged from two years ago.Next day, an x-ray abdomen anteroposterior demonstrated that an inferior vena cava filter was observed.After 2 days, an ultrasound venous lower extremity bilateral with compression showed no evidence of acute deep venous thrombosis or venous occlusion.Around 3 years and 10 months later, multiple axial images using computed tomography abdomen showed that an inferior vena cava filter was in place.It had a vertical orientation.The apex did not appear to touch the inferior vena cava wall.The tip of the inferior vena cava filter was 1.5 cm below the level of the right renal vein.The struts were patent proximally and extended outside of the inferior vena cava with the maximum amount of perforation being 5 mm.They did not appear to involve any adjacent structures.Therefore, the investigation is confirmed for perforation of the inferior vena cava and material deformation.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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It was reported through the litigation process that a vena cava filter was placed in a patient after being diagnosed with unknown medical complication.At some time post filter deployment, a computed tomography (ct) abdomen and pelvis without contrast revealed that the distal legs of the filter were contracted together and struts extended outside of the inferior vena cava.The device has not been removed and there were no reported attempts made to retrieve the filter.The patient reportedly experienced abdominal pain; however, the current status of the patient is unknown.
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