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.Approximately three weeks later, computed tomography of abdomen and pelvis was performed which revealed an inferior vena cava filter was present.After eight months, patient had abdominal pain with consistent heart burn.After three months, computed tomography of pancreas with contrast was performed which revealed an inferior vena cava filter was present with tip below the level of the renal veins.After four months, the patient had abdominal pain and gastroesophageal reflux disease.After three weeks, abdominal series was performed for abdominal pain and which also revealed an inferior vena cava filter.After five months, patient had abdominal pain, computed tomography of abdomen and pelvis with contrast was performed which revealed an inferior vena cava filter.After one year and one-month, computed tomography of abdomen and pelvis with contrast was performed which revealed an inferior vena cava filter with some of the struts extending beyond the inferior vena cava margin.After three years and four months, computed tomography of abdomen without contrast was performed and inferior vena cava filter was present with its cranial tip approximately 1.9cm below the right renal vein.This tip abuts the lateral wall of the inferior vena cava.It was angled 19 degree rightward in the coronal plane.Its struts appear intact.However, several struts partially perforate through the posterior and medial walls of the inferior vena cava.The majority of these perforated segments reside within retroperitoneal fat (with greatest perforation 17mm) although one strut appears to perforate the right lateral wall of the aorta (approximately 13mm).No obvious inferior vena cava stenosis was noted.Therefore, the investigation is confirmed for the alleged filter tilt and perforation of the inferior vena cava.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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