Abstract
Following percutaneous insertion of the Greenfield inferior vena cava filter via the femoral route, patients were evaluated for femoral vein thrombosis by real-time ultrasound or Duplex sonography. In 23 patients (24 veins) the femoral vein was dilated with an 8-mm (24 F) angioplasty balloon catheter. Eight of 24 common femoral veins were thrombosed (33%). These findings indicate that thrombosis is a significant complication of percutaneous filter insertion. Dilation was performed in 20 patients (22 veins) with a 9-mm (27 F) balloon catheter; only three veins were thrombosed (14%). Over-dilation of the femoral vein to 27 F to accommodate the 24 F sheath/dilator set may decrease the incidence of thrombosis.
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