The DENALI filter is indicated for the prevention of recurrent pulmonary emboli after being implanted permanently in the vena cava, in the following situations: • pulmonary thromboembolism when anticoagulants are contraindicated. • Failure of anticoagulant treatment for thromboembolism. • Emergency treatment after pulmonary embolism in which no major benefits are expected with conventional treatment. • Chronic and recurrent pulmonary embolism in which the anticoagulant treatment has failed or is contraindicated.