Patent ID: 8034023
Filing Date: 2011-10-11
Classification: A61B,A61F

Abstract:
1. A method of treating a lesion within a blood vessel that supplies blood to the heart, comprising: advancing an evacuation sheath assembly to a region of interest within a blood vessel, the evacuation sheath assembly comprising a multi-lumen tube having a proximal end, a distal end, a proximal opening, a distal opening, first and second lumens, and at least one sealing surface mounted on the distal end of the multi-lumen tube, wherein the first lumen is configured to be placed in fluid communication with a bloodstream and is sized to accept a therapeutic catheter, wherein the second lumen is an inflation lumen in fluid communication with the at least one sealing surface, and wherein the at least one sealing surface is adapted to form a fluid tight seal between the at least one sealing surface and an inner surface of the blood vessel; deploying the at least one sealing surface within the blood vessel upstream of the region of interest to occlude normal antegrade flow within the blood vessel adjacent to a lesion to be treated; advancing a guide wire through the evacuation sheath assembly to a position distal to the lesion to be treated after deploying the at least one sealing surface; advancing a dilation catheter having a dilation balloon through the evacuation sheath into the blood vessel after advancing the guide wire such that the dilation balloon is positioned across the lesion; dilating the lesion to be treated with the dilation balloon; and applying suction to induce retrograde flow within the blood vessel after advancing the guide wire and before advancing the dilation catheter.