Methods and devices for venous occlusion for the treatment of venous insufficiency

摘要

#$%^&*AU2019200639B220200507.pdf#####METHODS AND DEVICES FOR VENOUS OCCLUSION FOR THE TREATMENT OF VENOUS INSUFFICIENCY ABSTRACT A method of treating a vein, the method comprising the steps of: advancing a catheter (200) distally across a treatment zone in a vein; creating a first occlusion in the vein at a distal end of the treatment zone; introducing a first bolus of media into the vein out of a distal tip of the catheter (200) in a direction towards and directly against a proximal side of the first occlusion when the distal tip of the catheter (200) is at a first position in the vein defining a first volume within the vein between the first occlusion and the distal tip of the catheter (200) at the first position, wherein the first bolus has a second volume that is greater than the first volume; creating at least a second occlusion in the vein, spaced proximally apart from the first occlusion; introducing a second bolus of media into the vein out of the distal tip of the catheter (200) in the direction towards and directly against a proximal side of the second occlusion when the distal tip of the catheter (200) is at a second position in the vein defining a third volume within the vein between the second occlusion and the distal tip of the catheter at the second position, wherein the second bolus has a fourth volume that is greater than the third volume; and withdrawing the catheter (200) from the vein.