Clinical significance ofinferior vena cava filter implantation for preventing pulmonary embolism

：Objective To evaluatethe clinical significance of implanting an inferior vena cava filter to prevent pulmonaryembolism.Methods Reviewed the causality of 180 cases,which was undertaken the ultrasoundexamination,patients were diagnosed as the deep vein thrombosis,male patients were 128cases, female patients were 52 cases,median age was 65 years old,all received thetransfemora] implantation of inferior vena cava filter implantation.Results All theoperations were successfully conducted,filters were placed into inferior vena cava at 1-3cm inferior of renal vein,without hematoma in the puncture position and thrombosis.Onehundred and forty-nine cases (82.8%) were followed up at 1,6,12 months respectively, 55cases(30.6%)were followed up more than 36 months, no filter drift,deformation and inferiorvena perforation complications was observed.There was no fatal pulmonary embolism occurredfor all the cases,the inferior vena unobstructed rate was 95.6%.Conclusion Vena cavafilter is an effective and safe method which can prevent and cure pulmonary embolism.