1. We recommend against routine use of inferior vena cava filters (permanent or temporary) in conjunction with catheter-directed pharmacologic thrombolysis of the iliofemoral venous segments (Grade 1, Level C).
2. We suggest that the relative risks vs benefits of periprocedural retrievable inferior vena cava placement be considered in patients undergoing pharmacomechanical thrombolysis and in those with thrombus extending into the inferior vena cava or who have markedly limited cardiopulmonary reserve (Grade 2, Level C).