Clinical Application of Color Doppler Ultrasound Guided Inferior Vena Cava Filter Placement Through Femoral Vein

Objective To evaluate the clinical application of inferior vena cava filter (IVCF) guided by color Doppler flow imaging (CDFI) in patients with lower extremity deep vein thrombosis (DVT). Methods Thirty three patients with deep vein thrombosis of lower extremities were treated with CDFI guided IVCF implantation through femoral vein. The shape and position of IVCF were monitored by color ultrasound and X-ray, and PE and filter complications were followed up. Results 33 patients were examined by CDFI before operation. The femoral vein, common iliac vein bifurcation, inferior vena cava, left and right deep vein openings were clearly displayed. All veins had no variation and thrombosis. Under the guidance of CDFI, convertible filters were implanted through femoral vein, with a success rate of 100%. After operation, CDFI and X - ray confirmed that the filter was placed in the correct position, fully unfolded, without displacement or inclination. Among them, 29 cases were converted under X-ray guidance, and 8 cases were captured thrombus, with the capture rate of 24.2%. The filter did not tilt, shift, break or puncture the blood vessel wall, and there was no pulmonary embolism.